UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    Form 6-K

                    REPORT OF FOREIGN PRIVATE ISSUER PURSUANT
                         TO RULE 13a-16 OR 15d-16 UNDER
                       THE SECURITIES EXCHANGE ACT OF 1934

For the month of:  November, 2006

Commission File Number:  000-50393



                                 NEUROCHEM INC.

                          275 Armand-Frappier Boulevard
                                  Laval, Quebec
                                     H7V 4A7


Indicate by check mark whether the registrant  files or will file annual reports
under cover of Form 20-F or Form 40 F. Form 20-F [ ] Form 40-F [X]

Indicate by check mark if the  registrant is submitting the Form 6-K in paper as
permitted by Regulation S-T Rule 101(b)(1):
                                                               Yes [ ] No [X]

Indicate by check mark if the  registrant is submitting the Form 6-K in paper as
permitted by Regulation S-T Rule 101(b)(7):
                                                               Yes [ ] No [X]

Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g-3 under the Securities Exchange Act of 1934.
                                                               Yes [ ] No [X]

If "Yes" is marked, indicate below the file number assigned to the registrant in
connection with Rule 12g3-2(b):

                                   SIGNATURES:

       Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                                   NEUROCHEM INC.
November 13, 2006

                                   By:    /s/ David Skinner
                                         ---------------------------------------
                                         David Skinner, Vice President,
                                         General Counsel and Corporate Secretary


                                  FORM 51-102F3

                             MATERIAL CHANGE REPORT

1.   NAME AND ADDRESS OF ISSUER

Neurochem Inc. ("NEUROCHEM")
275 Armand-Frappier Blvd
Laval, Quebec
H7V 4A7 Canada

2.   DATE OF MATERIAL CHANGE

November 9, 2006

3.   NEWS RELEASE

A news release was issued on November 9, 2006 in Laval, Quebec.

4.   SUMMARY OF MATERIAL CHANGE

On November 3, 2006, Neurochem announced a private placement (the "PRIVATE
PLACEMENT") of US$40 million aggregate principal amount of 6% senior convertible
notes (the "NOTES") due 2026, with a conversion premium of 20%. On November 9,
2006, Neurochem announced the closing of the Private Placement.

5.   FULL DESCRIPTION OF MATERIAL CHANGE

On November 9, 2006, Neurochem announced the closing of its Private Placement
(previously announced on November 3, 2006) with UBS Securities LLC, as initial
purchaser of US$40 million aggregate principal amount of Notes. Neurochem has
granted the initial purchaser a 30-day option to purchase up to an additional
US$2.085 million aggregate principal amount of Notes. Neurochem will pay
interest on the Notes until maturity on November 15, 2026, subject to earlier
repurchase, redemption or conversion.

Neurochem has been advised that the FMRC Family Trust (of which Dr. Francesco
Bellini, the Chairman, President and CEO of Neurochem, is a beneficiary) and
Power Technology Investment Corporation (a subsidiary of Power Corporation of
Canada), the shareholders of Picchio Pharma Inc., the indirect principal
shareholder of Neurochem, and certain officers and directors of Neurochem and/or
such entities have purchased approximately US$17.585 million aggregate principal
amount of the Notes.

The issuance of securities to insiders may be considered a related-party
transaction within the meaning of Regulation Q-27 Respecting Protection of
Minority Securityholders in the Course of Certain Transactions of the Autorite
des marches financiers and Ontario Securities Commission Rule 61-501 - Insider
Bids, Issuer Bids, Business Combination and Related Party Transactions.



                                       -2-


However, this transaction is exempt from the valuation and minority approval
requirements provided under such regulation and rule since the fair market value
of the private placement to insiders is less than 25 percent of the market
capitalization of Neurochem. The Board of Directors of Neurochem has approved
the Private Placement. Directors purchasing Notes, directly or indirectly, in
the Private Placement, declared their interest prior to the approval by the
Board of Directors of the Private Placement, and abstained from voting on such
approval. A Material Change Report could not be filed earlier as the announced
Private Placement had not yet been completed and was subject to the satisfaction
of certain closing conditions.

Pursuant to registration rights granted to the initial purchaser of the Notes in
favour of holders of the Notes, Neurochem has agreed to file a prospectus and
registration statement to qualify the resale of the Notes and the common shares
issuable upon conversion of the Notes, to become effective within 180 days of
the closing of the Private Placement.

Neurochem will use the net proceeds from the Private Placement for general
corporate purposes, which may include, but are not limited to, advancing its
current clinical development programs or initiating new ones, research for new
or existing products and capital expenditures.

The terms and conditions of the Notes are described in a trust indenture (the
"TRUST INDENTURE") dated as of November 9, 2006, between the Bank of New York,
as trustee, and Neurochem, while the registration rights described above are set
forth in a registration rights agreement (the "REGISTRATION RIGHTS AGREEMENT")
also dated as of November 9, 2006. A copy of each of the Trust Indenture and of
the Registration Rights Agreement are being filed by Neurochem as a material
agreement.

6.   CONFIDENTIALITY

Not applicable.

7.   OMITTED INFORMATION

None.

8.   EXECUTIVE OFFICER

For further information, please contact David Skinner, Vice President, General
Counsel and Secretary, at 450-680-4580.

9.   DATE OF THIS REPORT

November 10, 2006.



                                 NEUROCHEM INC.

                          REGISTRATION RIGHTS AGREEMENT

November 9, 2006



                          REGISTRATION RIGHTS AGREEMENT

          THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is made and
entered into as of November 9, 2006, by and between Neurochem Inc., a
corporation organized under the Canada Business Corporations Act (the
"Company"), and UBS Securities LLC (the "Initial Purchaser") pursuant to that
certain Purchase Agreement, dated November 3, 2006 (the "Purchase Agreement"),
between the Company and the Initial Purchaser.

          As an inducement to the Initial Purchaser entering into the Purchase
Agreement, the Company has agreed to provide the registration rights set forth
in this Agreement. The execution and delivery of this Agreement is a condition
to the closing under the Purchase Agreement. The terms "herein," "hereof,"
"hereto," "hereinafter" and similar terms, as used in this Agreement, shall in
each case refer to this Agreement as a whole and not to any particular section,
paragraph, sentence or other subdivision of this Agreement.

          The Company agrees with the Initial Purchaser (i) for its benefit as
Initial Purchaser and (ii) for the benefit of the beneficial owners (including
the Initial Purchaser) from time to time of the Covered Securities (as defined
herein) (each of the foregoing a "Holder" and, together, the "Holders"), as
follows:

     1. Definitions. Capitalized terms used herein without definition shall have
the respective meanings set forth in the Purchase Agreement. As used in this
Agreement, the following terms shall have the following meanings:

          (a) "Additional Filing Deadline Date" has the meaning set forth in
     Section 2(e) hereof.

          (b) "Additional Amounts" has the meaning ascribed to it in the
     Indenture.

          (c) "additional interest" has the meaning set forth in Section 2(e)
     hereof.

          (d) "Additional Interest Accrual Period" has the meaning set forth in
     Section 2(e) hereof.

          (e) "Additional Interest Amount" has the meaning set forth in Section
     2(e) hereof.

          (f) "Additional Interest Payment Date" means each May 15 and November
     15 of each year.

          (g) "Affiliate" means, with respect to any specified person, an
     "affiliate," as defined in Rule 144, of such person.

          (h) "Amendment Effectiveness Deadline Date" has the meaning set forth
     in Section 2(d) hereof.


                                       -1-



          (i) "Automatic Shelf Registration Statement" has the meaning ascribed
     to it in Rule 405.

          (j) "Business Day" means each day on which each of the New York Stock
     Exchange and the TSX is open for trading.

          (k) "Canadian Securities Laws" means the applicable securities
     legislation of each of the provinces of Canada and the rules, regulations,
     blanket rulings, orders and notices made thereunder and the local, uniform
     and national policies adopted by the securities commissions (the
     "Commissions") of each of such provinces.

          (l) "Claim" has the meaning set forth in Section 10(n) hereof.

          (m) "Commissions" has the meaning set forth in Section 1(k) hereof.

          (n) "Common Shares" means the common shares, without nominal or par
     value, of the Company and any other share capital as may constitute "Common
     Shares" for purposes of the Indenture, including the Underlying Common
     Shares.

          (o) "Company Indemnified Party" has the meaning set forth in Section
     6(b) hereof.

          (p) "Conversion Rate" has the meaning ascribed to it in the Indenture.

          (q) "Covered Security" has the meaning set forth in Section 1(yy)
     hereof.

          (r) "Effectiveness Deadline Date" has the meaning set forth in Section
     2(a) hereof.

          (s) "Effectiveness Period" means a period that terminates when there
     are no Registrable Securities outstanding.

          (t) "Event" has the meaning set forth in Section 2(e) hereof.

          (u) "Event Date" has the meaning set forth in Section 2(e) hereof.

          (v) "Exchange Act" means the Securities Exchange Act of 1934, as
     amended, and the rules and regulations of the SEC promulgated thereunder.

          (w) "Excluded Holder" has the meaning ascribed to it in the Indenture.

          (x) "Filing Deadline Date" has the meaning set forth in Section 2(a)
     hereof.

          (y) "Form F-3" means Form F-3 under the Securities Act.

          (z) "Form F-10" means Form F-10 under the Securities Act.


                                      -2-



          (aa) "Form S-3" means Form S-3 under the Securities Act.

          (bb) "Holder" has the meaning set forth in the preamble hereto.

          (cc) "Holder Indemnified Party" has the meaning set forth in Section
     6(a) hereof.

          (dd) "Holder Information" has the meaning set forth in Section 6(b)
     hereof.

          (ee) "Indemnified Party" has the meaning set forth in Section 6(c)
     hereof.

          (ff) "Indemnifying Party" has the meaning set forth in Section 6(c)
     hereof.

          (gg) "Indenture" means the Indenture, dated as of November 9, 2006,
     between the Company and the Trustee, pursuant to which the Notes are being
     issued.

          (hh) "Initial Purchaser" has the meaning set forth in the preamble
     hereto.

          (ii) "Initial Shelf Registration Statement" has the meaning set forth
     in Section 2(a) hereof.

          (jj) "Issue Date" means November 9, 2006.

          (kk) "Managing Underwriters" has the meaning set forth in Section 8(a)
     hereof.

          (ll) "Material Event" has the meaning set forth in Section 3(j)
     hereof.

          (mm) "NASD Rules" has the meaning set forth in Section 3(t) hereof.

          (nn) "Notes" means the 6% Convertible Senior Notes due 2026 of the
     Company to be purchased pursuant to the Purchase Agreement.

          (oo) "Notice and Questionnaire" means a written questionnaire
     containing substantially the information called for by the Selling
     Securityholder Notice and Questionnaire attached as Annex A to the Offering
     Memorandum of the Company, dated November 3, 2006, relating to the Notes.

          (pp) "Notice Holder" means, on a given date, any Holder that has
     delivered a Notice and Questionnaire to the Company on or prior to such
     date, provided not all of such Holder's Registrable Securities that have
     been registered for resale pursuant to a Notice and Questionnaire have been
     sold in accordance with a Shelf Registration Statement.

          (qq) "Option Purchase Date" has the meaning ascribed to it in the
     Indenture.


                                      -3-



          (rr) "Proceeding" has the meaning set forth in Section 6(c) hereof.

          (ss) "Prospectus" means the prospectus included in each Registration
     Statement (including, without limitation, a prospectus that includes any
     information previously omitted from a prospectus filed under applicable
     Canadian Securities Laws), as amended or supplemented by any prospectus
     supplement, with respect to the terms of the offering of any Registrable
     Securities covered by a Registration Statement, and all other amendments
     and supplements to the Prospectus and all material incorporated or deemed
     incorporated by reference in such Prospectus.

          (tt) "Purchase Agreement" has the meaning set forth in the preamble
     hereof.

          (uu) "Record Date" means, (i) May 1, with respect to an Additional
     Interest Payment Date that occurs on May 15 and (ii) November 1, with
     respect to an Additional Interest Payment Date that occurs on November 15.

          (vv) "Record Holder" means, with respect to an Additional Interest
     Payment Date relating to a Registrable Security for which any Additional
     Interest Amount has accrued, a Notice Holder that was the holder of record
     of such Registrable Security at the close of business on the Record Date
     relating to such Additional Interest Payment Date.

          (ww) "Redemption" has the meaning ascribed to it in the Indenture.

          (xx) "Redemption Date" has the meaning ascribed to it in the
     Indenture.

          (yy) "Registrable Securities" means the Notes, until such Notes have
     been converted into the Underlying Common Shares, and, at all times, the
     Underlying Common Shares and any securities into or for which such
     Underlying Common Shares has been converted or exchanged, and any security
     issued with respect thereto upon any stock dividend, split or similar event
     (each of the foregoing, a "Covered Security") until, in the case of any
     such security, the earliest of:

               (i) the date on which such security has been effectively
          registered under Canadian Securities Laws and the Securities Act and
          disposed of in accordance with the Registration Statement relating
          thereto;

               (ii) the date on which such security may be resold without
          restriction pursuant to Rule 144(k) or any successor provision
          thereto; or

               (iii) the date on which such security has been publicly sold
          pursuant to Rule 144 or any successor provision thereto.

          (zz) "Registration Expenses" has the meaning set forth in Section 5
     hereof.

          (aaa) "Registration Statement" means each registration statement,
     under the Securities Act, of the Company that covers any of the Registrable
     Securities pursuant to


                                      -4-



     this Agreement, including amendments and supplements to such registration
     statement and all exhibits of, and all materials incorporated by reference
     or deemed to be incorporated by reference in, such registration statement,
     amendment or supplement under the Securities Act.

          (bbb) "Repurchase at Holder's Option" has the meaning ascribed to it
     in the Indenture.

          (ccc) "Repurchase Date" has the meaning ascribed to it in the
     Indenture.

          (ddd) "Repurchase Upon Change in Control" has the meaning ascribed to
     it in the Indenture.

          (eee) "Rule 144" means Rule 144 under the Securities Act, as such Rule
     may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (fff) "Rule 144A" means Rule 144A under the Securities Act, as such
     Rule may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (ggg) "Rule 405" means Rule 405 under the Securities Act, as such Rule
     may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (hhh) "Rule 415" means Rule 415 under the Securities Act, as such Rule
     may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (iii) "Rule 424" means Rule 424 under the Securities Act, as such Rule
     may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (jjj) "Rule 430B" means Rule 430B under the Securities Act, as such
     Rule may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (kkk) "Rule 456" means Rule 456 under the Securities Act, as such Rule
     may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (lll) "Rule 457" means Rule 457 under the Securities Act, as such Rule
     may be amended from time to time, or any similar rule or regulation
     hereafter adopted by the SEC.

          (mmm) "SEC" means the Securities and Exchange Commission.


                                      -5-



          (nnn) "Securities Act" means the Securities Act of 1933, as amended,
     and the rules and regulations promulgated by the SEC thereunder.

          (ooo) "Shelf Registration Statement" means the Initial Shelf
     Registration Statement and any Subsequent Shelf Registration Statement.

          (ppp) "Subsequent Shelf Registration Statement" has the meaning set
     forth in Section 2(b) hereof.

          (qqq) "Subsequent Shelf Registration Statement Effectiveness Deadline
     Date" has the meaning set forth in Section 2(d) hereof.

          (rrr) "Suspension Notice" has the meaning set forth in Section 3(j)
     hereof.

          (sss) "Suspension Period" has the meaning set forth in Section 3(j)
     hereof.

          (ttt) "Tax Redemption" has the meaning ascribed to it in the
     Indenture.

          (uuu) "Tax Redemption Date" has the meaning ascribed to it in the
     Indenture.

          (vvv) "TIA" means the Trust Indenture Act of 1939, as amended.

          (www) "Trustee" means The Bank of New York, the trustee under the
     Indenture.

          (xxx) "TSX" means the Toronto Stock Exchange.

          (yyy) "Underlying Common Shares" means the Common Shares, if any,
     issuable upon conversion of the Notes.

     2. Shelf Registration.

     (a) The Company shall prepare and file, or cause to be prepared and filed,
with the Commissions and the SEC, as soon as practicable but in any event by the
date (the "Filing Deadline Date") that is ninety (90) days after the Issue Date,
a Registration Statement (the "Initial Shelf Registration Statement") that shall
be prepared in accordance with applicable Canadian Securities Laws under the
Multi-Jurisdictional Disclosure System on Form F-10 (or, if the Company is not
then eligible to register Registrable Securities for resale on Form F-10, on
another appropriate form that is then available to the Company for the purposes
contemplated by this Agreement) under Canadian shelf prospectus procedures,
registering the resale from time to time by Holders thereof of all of the
Registrable Securities. The Initial Shelf Registration Statement shall provide
for the registration of such Registrable Securities for resale by such Holders
in accordance with any reasonable method of distribution elected by the Holders.
In no event shall the Initial Shelf Registration Statement be filed with any
Commission or the SEC prior to completion of the offering of the Notes
contemplated by the Purchase


                                      -6-



Agreement. The Company shall use its reasonable best efforts to (i) cause the
Initial Shelf Registration Statement to become effective under the Securities
Act as promptly as practicable but in any event by the date (the "Effectiveness
Deadline Date") that is one hundred eighty (180) days after the Issue Date and
(ii) continuously keep a Shelf Registration Statement continuously effective
under the Securities Act and Canadian Securities Laws until the expiration of
the Effectiveness Period. At the time the Initial Shelf Registration Statement
becomes effective under the Securities Act, each Holder that became a Notice
Holder prior to the date of such effectiveness shall be named as a selling
securityholder in the Initial Shelf Registration Statement and the related
Prospectus in such a manner as to permit such Holder to deliver such Prospectus
to purchasers of Registrable Securities in accordance with applicable law.

     (b) If, for any reason, at any time during the Effectiveness Period any
Shelf Registration Statement ceases to be effective under the Securities Act, or
ceases to be usable for the purposes contemplated hereunder, the Company shall
use its reasonable best efforts to promptly cause such Shelf Registration
Statement to become effective under the Securities Act (including obtaining the
prompt withdrawal of any order suspending the effectiveness of such Shelf
Registration Statement), and in any event shall, within fifteen (15) days of
such cessation of effectiveness, (i) amend such Shelf Registration Statement in
a manner reasonably expected to obtain the withdrawal of any order suspending
the effectiveness of such Shelf Registration Statement or (ii) file an
additional Registration Statement (a "Subsequent Shelf Registration Statement")
that shall be prepared in accordance with applicable Canadian Securities Laws
under the Multi-Jurisdictional Disclosure System on Form F-10 (or, if the
Company is not then eligible to register Registrable Securities for resale on
Form F-10, on another appropriate form that is then available to the Company for
the purposes contemplated by this Agreement) for an offering to be made on a
delayed or continuous basis pursuant to Canadian shelf prospectus offering
procedures registering the resale from time to time by Holders thereof of all
securities that are Registrable Securities as of the time of such filing (or, if
registration of Registrable Securities not held by Notice Holders is not
permitted by the rules and regulations of the SEC, then registering the resale
from time to time by Notice Holders of their securities that are Registrable
Securities as of the time of such filing). If a Subsequent Shelf Registration
Statement is filed, the Company shall use its reasonable best efforts to (A)
cause such Subsequent Shelf Registration Statement to become effective under the
Securities Act as promptly as practicable after such filing, but in no event
later than the Subsequent Shelf Registration Statement Effectiveness Deadline
Date and (B) keep such Subsequent Shelf Registration Statement (or another
Subsequent Shelf Registration Statement) continuously effective until the end of
the Effectiveness Period. Each such Subsequent Shelf Registration Statement, if
any, shall provide for the registration of such Registrable Securities for
resale by such Holders in accordance with any reasonable method of distribution
elected by the Holders.

     (c) The Company shall give due consideration to any comments to a
Registration Statement or Prospectus, or any supplement thereto, that the
Initial Purchaser, a Holder or the Trustee shall reasonably provide, and make
appropriate amendments or supplements to the Registration Statement or
Prospectus to the extent


                                      -7-



such comments relate to the Initial Purchaser, a Holder, the number of
Registrable Securities held by any such person or the intended plan of
distribution thereof by any such person.

     (d)

          (i) Each Holder of Registrable Securities agrees that, if such Holder
     wishes to sell Registrable Securities pursuant to a Shelf Registration
     Statement and related Prospectus, it will do so only in accordance with
     this Section 2(d) and Section 3(j). Each Holder of Registrable Securities
     wishing to sell Registrable Securities pursuant to a Shelf Registration
     Statement and related Prospectus agrees to deliver a completed and executed
     Notice and Questionnaire to the Company prior to any attempted or actual
     distribution of Registrable Securities under a Shelf Registration
     Statement. If a Holder becomes a Notice Holder on or after the date the
     Initial Shelf Registration Statement becomes effective under the Securities
     Act, the Company shall, as promptly as practicable after the date such
     Holder became a Notice Holder, and in any event, subject to clause (B)
     below, within the later of (x) five (5) Business Days after such date or
     (y) five (5) Business Days after the expiration of any Suspension Period
     that either (I) is in effect when such Holder became a Notice Holder or
     (II) is put into effect within five (5) Business Days after the date such
     Holder became a Notice Holder,

               (A) file with the Commissions and the SEC a supplement to the
          related Prospectus (or, if required by law, a post-effective amendment
          to the Shelf Registration Statement or a Subsequent Shelf Registration
          Statement), and all other document(s), in each case as is required or
          desirable so that such Notice Holder is named as a selling
          securityholder in a Shelf Registration Statement and the related
          Prospectus in such a manner as to permit such Notice Holder to deliver
          a Prospectus to purchasers of the Registrable Securities in accordance
          with applicable law; provided, however, that, if a post-effective
          amendment or a Subsequent Shelf Registration Statement is required
          under the rules and regulations of the SEC in order to permit resales
          by such Notice Holder, the Company shall not be required to file more
          than one (1) post-effective amendment or Subsequent Shelf Registration
          Statement for such purpose in any thirty (30) day period;

               (B) if, pursuant to Section 2(d)(i)(A), the Company shall have
          filed a post-effective amendment to the Shelf Registration Statement
          or filed a Subsequent Shelf Registration Statement, the Company shall
          use its reasonable best efforts to cause such post-effective amendment
          or Subsequent Shelf Registration Statement, as the case may be, to
          become effective under the Securities Act as promptly as practicable,
          but in any event by the date (the "Amendment Effectiveness Deadline
          Date," in the case of a post-effective amendment, and the "Subsequent
          Shelf Registration Statement Effectiveness Deadline Date," in the case
          of a


                                      -8-



          Subsequent Shelf Registration Statement) that is thirty (30) days
          after the date such post-effective amendment or Subsequent Shelf
          Registration Statement, as the case may be, is required by this
          Section 2(d) to be filed with the SEC;

               (C) the Company shall provide such Notice Holder a reasonable
          number of copies of any documents filed pursuant to clause (A) above;

               (D) the Company shall notify such Notice Holder as promptly as
          practicable after the effectiveness under the Securities Act of any
          post-effective amendment or Subsequent Shelf Registration Statement
          filed pursuant to clause (A) above;

               (E) if such Holder became a Notice Holder during a Suspension
          Period, or a Suspension Period is put into effect within five (5)
          Business Days after the date such Holder became a Notice Holder, the
          Company shall so inform such Notice Holder and shall take the actions
          set forth in clauses (A), (B), (C) and (D) above within five (5)
          Business Days after expiration of such Suspension Period in accordance
          with Section 3(j); and

               (F) if, under applicable law, the Company has more than one
          option as to the type or manner of making any such filing, the Company
          shall make the required filing or filings in the manner or of a type
          that is reasonably expected to result in the earliest availability of
          a Prospectus for effecting resales of Registrable Securities.

          (ii) Notwithstanding anything contained herein to the contrary, the
     Company shall be under no obligation to name any Holder that is not a
     Notice Holder as a selling securityholder in any Shelf Registration
     Statement or related Prospectus; provided, however, that any Holder that
     becomes a Notice Holder (regardless of when such Holder became a Notice
     Holder) shall be named as a selling securityholder in a Shelf Registration
     Statement or related Prospectus in accordance with the requirements of this
     Section 2(d) or Section 2(a), as applicable.

     (e) The parties hereto agree that the Holders of Registrable Securities
will suffer damages, and that it would not be feasible to ascertain the extent
of such damages with precision, if:

          (i) the Initial Shelf Registration Statement has not been filed with
     the SEC on or prior to the Filing Deadline Date;

          (ii) the Initial Shelf Registration Statement has not become effective
     under the Securities Act on or prior to the Effectiveness Deadline Date;


                                      -9-



          (iii) either a supplement to a Prospectus, a post-effective amendment
     or a Subsequent Shelf Registration Statement is required to be filed with
     the SEC and fails to be filed therewith within the prescribed period and in
     the manner set forth in Section 2(d) (the date such filing is required to
     be made being an "Additional Filing Deadline Date") or, in the case of a
     post-effective amendment or a Subsequent Shelf Registration Statement, such
     post-effective amendment or Subsequent Registration Statement does not
     become effective under the Securities Act by the Amendment Effectiveness
     Deadline Date or the Subsequent Shelf Registration Statement Effectiveness
     Deadline Date, as the case may be;

          (iv) the Initial Shelf Registration Statement or any Subsequent
     Registration Statement is filed with the SEC and becomes effective under
     the Securities Act but shall thereafter cease to be effective (without
     being succeeded immediately by a new Registration Statement that is filed
     and immediately becomes effective under the Securities Act) or usable for
     the offer and sale of Registrable Securities in the manner contemplated by
     this Agreement for a period of time (including any Suspension Period) which
     shall exceed thirty (30) days in the aggregate in any three (3) month
     period or sixty (60) days in the aggregate in any twelve (12) month period;
     or

          (v) any Registration Statement or amendment thereto, at the time it
     becomes effective under the Securities Act, or any Prospectus relating
     thereto, at the time it is filed with the SEC or, if later, at the time the
     Registration Statement to which such Prospectus relates becomes effective
     under the Securities Act, shall fail to name each Notice Holder as a
     selling securityholder in such a manner as to permit such Notice Holder to
     sell its Registrable Securities pursuant to such Registration Statement and
     Prospectus in accordance with applicable law, which Notice Holder was
     entitled, pursuant to the terms of this Agreement, to be so named (it being
     understood that, without limitation, naming such Notice Holder in a manner
     that permits such Notice Holder to sell only a portion of such Notice
     Holder's Registrable Securities referenced in such Notice Holder's Notice
     and Questionnaire shall be deemed to be an "Event" (as defined below) for
     purposes of this clause (v)).

Each of the events of a type described in any of the foregoing clauses (i)
through (v) are individually referred to herein as an "Event," and

          (V) the Filing Deadline Date, in the case of clause (i) above,

          (W) the Effectiveness Deadline Date, in the case of clause (ii) above,

          (X) the Additional Filing Deadline Date, the Amendment Effectiveness
     Deadline Date or the Subsequent Shelf Registration Statement Effectiveness
     Deadline Date, as the case may be, in the case of clause (iii) above,


                                      -10-



          (Y) the first date on which the duration of the ineffectiveness or
     unusability of the Shelf Registration Statement exceeds the number of days
     permitted by clause (iv) above, in the case of clause (iv) above, and

          (Z) the date the applicable Registration Statement or amendment
     thereto shall become effective under the Securities Act, or the date the
     applicable Prospectus is filed with the Commissions and the SEC or, if
     later, the time the Registration Statement to which such Prospectus relates
     becomes effective under the Securities Act, as the case may be, in the case
     of clause (v) above,

are each herein referred to as an "Event Date." Events shall be deemed to
continue until the following dates with respect to the respective types of
Events:

          (A) the date the Initial Shelf Registration Statement is filed with
     the Commissions and the SEC, in the case of an Event of the type described
     in clause (i) above;

          (B) the date the Initial Shelf Registration Statement becomes
     effective under the Securities Act, in the case of an Event of the type
     described in clause (ii) above;

          (C) the date a supplement to a Prospectus is filed with the SEC or, in
     the event an amendment or a Subsequent Shelf Registration Statement is
     filed with the SEC, the date the same becomes effective under the
     Securities Act, in the case of an Event of the type described in clause
     (iii) above;

          (D) the date the Initial Shelf Registration Statement or the
     Subsequent Shelf Registration Statement, as the case may be, becomes
     effective and usable again, or the date another Subsequent Shelf
     Registration Statement is filed with the SEC pursuant to Section 2(b) and
     becomes effective, in the case of an Event of the type described in clause
     (iv) above; or

          (E) the date a supplement to the Prospectus is filed with the SEC, or
     the date an amendment to the Registration Statement becomes effective under
     the Securities Act, or the date a Subsequent Shelf Registration Statement
     becomes effective under the Securities Act, which supplement,
     post-effective amendment or Subsequent Shelf Registration Statement, as the
     case may be, names as selling securityholders, in such a manner as to
     permit them to sell their Registrable Securities pursuant to the
     Registration Statement and Prospectus supplement in accordance with
     applicable law, all Notice Holders entitled as herein provided to be so
     named, in the case of an Event of the type described in clause (v) above.

Accordingly, commencing on (and including) any Event Date and ending on (but
excluding) the next date on which there are no Events that have occurred and are
continuing (an "Additional Interest Accrual Period"), the Company agrees to pay,
as additional interest ("additional interest") and not as a penalty, an amount
(the "Additional


                                      -11-



Interest Amount") at the rate described below, payable periodically on each
Additional Interest Payment Date to Record Holders, to the extent of, for each
such Additional Interest Payment Date, the unpaid Additional Interest Amount
that has accrued to (but excluding) such Additional Interest Payment Date (or,
if the Additional Interest Accrual Period shall have ended prior to such
Additional Interest Payment Date, the day immediately after the last day of such
Additional Interest Accrual Period); provided, however, that any unpaid
Additional Interest Amount that has accrued with respect to any Note, or portion
thereof, called for Redemption on a Redemption Date or Tax Redemption on a Tax
Redemption Date, or purchased by the Company pursuant to a Repurchase at
Holder's Option or Repurchase Upon Change in Control on an Option Purchase Date
or Repurchase Date, as the case may be, that is after the close of business on
the Record Date relating to such Additional Interest Payment Date and before
such Additional Interest Payment Date, shall, in each case, be instead paid, on
such Redemption Date, Tax Redemption Date, Option Purchase Date or Repurchase
Date, as the case may be, to the Holder who submitted such Note or portion
thereof for Redemption, Tax Redemption Repurchase at Holder's Option or
Repurchase Upon Change in Control, as the case may be.

The Additional Interest Amount shall accrue at a rate per annum equal to one
quarter of one percent (0.25%) for the ninety (90) day period beginning on, and
including, the Event Date and thereafter at a rate per annum equal to one half
of one percent (0.50%) of the aggregate principal amount of the Notes of which
such Record Holders were holders of record at the close of business on the
applicable Record Date; provided, however, that:

          (I) unless there shall be a default in the payment of any Additional
     Interest Amount, no Additional Interest Amounts shall accrue as to any Note
     from and after the earlier of (x) the date such Note is no longer a
     Registrable Security, (y) the date, and to the extent, such Note is
     converted into cash and/or shares of Common Shares in accordance with the
     Indenture and (z) the expiration of the Effectiveness Period;

          (II) only those Holders (or their subsequent transferees) failing to
     be named as selling securityholders in the manner prescribed in Section
     2(e)(v) above shall be entitled to receive any Additional Interest Amounts
     that have accrued solely with respect to an Event of the type described in
     Section 2(e)(v) above (it being understood that this clause (II) shall not
     impair any right of any Holder to receive Additional Interest Amounts that
     have accrued with respect to an Event other than an Event of the type
     described in Section 2(e)(v) above);

          (III) only those Holders (or their subsequent transferees) whose
     delivery of a Notice and Questionnaire gave rise to the obligation of the
     Company, pursuant to Section 2(d)(i), to file and, if applicable, make
     effective under the Securities Act the supplement, post-effective amendment
     or Subsequent Shelf Registration Statement referred to in Section 2(e)(iii)
     above shall be entitled to receive any Additional Interest Amounts that
     have accrued solely with respect to an Event of the type described in
     Section 2(e)(iii) above (it being understood that


                                      -12-



     this clause (III) shall not impair any right of any Holder to receive
     Additional Interest Amounts that have accrued with respect to an Event
     other than an Event of the type described in Section 2(e)(iii) above); and

          (IV) if a Note ceases to be outstanding during an Additional Interest
     Accrual Period for which an Additional Interest Amount would be payable
     with respect to such Note, then the Additional Interest Amount payable
     hereunder with respect to such Note shall be prorated on the basis of the
     number of full days such Note is outstanding during such Additional
     Interest Accrual Period.

Except as provided in the final paragraph of this Section 2(e), (i) the rate of
accrual of the Additional Interest Amount with respect to any period shall not
exceed the rate provided for in this Section 2(e) notwithstanding the occurrence
of multiple concurrent Events and (ii) following the cure of all Events
requiring the payment by the Company of Additional Interest Amounts to the
Holders pursuant to this Section, the accrual of Additional Interest Amounts
shall cease (without in any way limiting the effect of any subsequent Event
requiring the payment of Additional Interest Amounts by the Company). All
installments of additional interest shall be paid by wire transfer of
immediately available funds to the account specified by the Notice Holder or, if
no such account is specified, by mailing a check to such Notice Holder's address
shown in the register of the registrar for the Notes or for the Underlying
Common Shares, as the case may be.

All of the Company's obligations set forth in this Section 2(e) that are
outstanding with respect to any Registrable Security at the time such
Registrable Security ceases to be a Registrable Security shall survive until
such time as all such obligations with respect to such security have been
satisfied in full (notwithstanding termination of this Agreement pursuant to
Section 10(m)).

The parties hereto agree that the additional interest provided for in this
Section 2(e) constitutes a reasonable estimate of the damages in respect of the
Notes that may be incurred by Holders of the Notes by reason of an Event
relating to such Notes, including, without limitation, the failure of a Shelf
Registration Statement to be filed, become effective under the Securities Act,
amended or replaced to include the names of all Notice Holders or available for
effecting resales of Registrable Securities in accordance with the provisions
hereof.

If any Additional Interest Amounts are not paid when due, then, to the extent
permitted by law, such overdue Additional Interest Amounts, if any, shall bear
interest, compounded semi-annually, until paid at the rate of interest payable
with respect to overdue amounts on the Notes pursuant to Section 2.12 of the
Indenture.

     (f) The Trustee shall be entitled, on behalf of Holders, to seek any
available remedy for the enforcement of this Agreement, including for the
payment of any Additional Interest Amount.

3. Registration Procedures. In connection with the registration obligations of
the


                                      -13-



Company under Section 2 hereof, the Company shall:

          (a) Prepare and file a Prospectus with the Commissions and a Shelf
     Registration Statement or Shelf Registration Statements with the SEC in the
     manner provided in this Agreement and use its reasonable best efforts to
     cause each such Shelf Registration Statement to become effective under the
     Securities Act and remain effective under the Securities Act as provided
     herein; provided, that, before filing any Shelf Registration Statement or
     Prospectus or any amendments or supplements thereto with the SEC, the
     Company shall furnish to the Initial Purchaser and counsel for the Holders
     and for the Initial Purchaser (or, if applicable, separate counsel for the
     Holders) copies of all such documents proposed to be filed, give due
     consideration to any comments thereto as the Initial Purchaser or such
     counsel reasonably shall propose within three (3) Business Days of the
     delivery of such copies to the Initial Purchaser and such counsel, and
     reflect in each such document when so filed with any Commission or the SEC
     any of such comments that relate to the Initial Purchaser, a Holder, the
     number of Registrable Securities held by any such person or the intended
     plan of distribution thereof by any such person. Each Registration
     Statement that is or is required by this Agreement to be filed with any
     Commission or the SEC shall be filed on Form F-10 under the
     Multi-Jurisdictional Disclosure System, if the Company is then eligible to
     use Form F-10 for the purposes contemplated by this Agreement, or, if the
     Company is not then so eligible to use Form F-10, shall be on another
     appropriate form that is then available to the Company for the purposes
     contemplated by this Agreement. Each such Registration Statement that is
     filed on Form S-3 or Form F-3 shall constitute an Automatic Shelf
     Registration Statement if the Company is then eligible to file an Automatic
     Shelf Registration Statement on Form S-3 or Form F-3 for the purposes
     contemplated by this Agreement. If, at the time any Registration Statement
     is filed with the SEC, the Company is eligible, pursuant to Rule 430B(b),
     to omit, from the prospectus that is filed as part of such Registration
     Statement, the identities of selling securityholders and amounts of
     securities to be registered on their behalf, then the Company shall prepare
     and file such Registration Statement in a manner as to permit such omission
     and to allow for the subsequent filing of such information in a prospectus
     pursuant to Rule 424(b) in the manner contemplated by Rule 430B(d).

          (b) Prepare and file with the SEC such amendments and post-effective
     amendments to each Shelf Registration Statement as may be necessary to keep
     such Shelf Registration Statement or Subsequent Shelf Registration
     Statement continuously effective until the expiration of the Effectiveness
     Period; cause the related Prospectus to be supplemented by any required
     Prospectus supplement and, as so supplemented, to be filed with the
     Commissions and the SEC; and comply with the provisions of the Canadian
     Securities Laws and the Securities Act applicable to it with respect to the
     disposition of all securities covered by each Shelf Registration Statement
     during the Effectiveness Period in accordance with the intended methods of
     disposition by the sellers thereof set forth in such Shelf Registration
     Statement as so amended or such Prospectus as so supplemented.

          (c) If the third anniversary of the initial effective date of any
     Registration


                                      -14-



     Statement (within the meaning of Rule 415(a)(5) under the Act) shall occur
     at any time during the Effectiveness Period, and if offers or sales
     pursuant to such Registration Statement are thereafter prohibited by Rule
     415(a)(5), file with the Commissions and the SEC, prior to such third
     anniversary, a new Registration Statement covering the Registrable
     Securities, in the manner contemplated by, and in compliance with, Rule
     415(a)(6), and use its reasonable best efforts to cause such new
     Registration Statement to become effective under the Securities Act as soon
     as practicable, but in any event within 180 days after such third
     anniversary. If the twenty fifth (25) month anniversary of the initial
     effective date of any Registration Statement shall occur during the
     Effectiveness period, the Company shall file with the SEC, prior to such
     anniversary, a new Registration Statement covering the Registrable
     Securities and use its reasonable best efforts to cause such new
     Registration Statement to become effective under the Securities Act as soon
     as practicable. Each such new Registration Statement referred to in this
     Section 3(c), if any, shall be deemed, for purposes of this Agreement, to
     be a Subsequent Shelf Registration Statement.

          (d) If, at any time during the Effectiveness Period, any Registration
     Statement shall cease to comply with the requirements of the Securities Act
     with respect to eligibility for the use of the form on which such
     Registration Statement was filed with the SEC (or if such Registration
     Statement constituted an Automatic Shelf Registration Statement at the time
     it was filed with the SEC and shall thereafter cease to constitute an
     Automatic Shelf Registration Statement, or if the Company shall have
     received, from the SEC, pursuant to Rule 401(g)(2) under the Securities
     Act, or from any Commission, a notice of objection to the use of the form
     on which such Registration Statement was filed with any Commission or the
     SEC), (i) promptly give notice to the Notice Holders and counsel for the
     Holders and for the Initial Purchasers (or, if applicable, separate counsel
     for the Holders) and to the Initial Purchasers and (ii) promptly file with
     the SEC a new Registration Statement under the Securities Act, or a
     post-effective amendment to such Registration Statement, to effect
     compliance with the Securities Act. The Company shall use its reasonable
     best efforts to cause such new Registration Statement or post-effective
     amendment to become effective under the Securities Act as soon as
     practicable and shall promptly give notice of such effectiveness to the
     Notice Holders and counsel for the Holders and for the Initial Purchasers
     (or, if applicable, separate counsel for the Holders) and to the Initial
     Purchasers. Each such new Registration Statement, if any, shall be deemed,
     for purposes of this Agreement, to be a Subsequent Shelf Registration
     Statement.

          (e) As promptly as practicable, give notice to the Notice Holders, the
     Initial Purchaser and counsel for the Holders and for the Initial Purchaser
     (or, if applicable, separate counsel for the Holders):

               (i) when any Prospectus, Prospectus supplement, Shelf
          Registration Statement or post-effective amendment to a Shelf
          Registration Statement has been filed with the SEC and, with respect
          to a Shelf Registration Statement or any post-effective amendment,
          when the same has become effective under the Securities Act,


                                      -15-



               (ii) of any request, following the effectiveness of a Shelf
          Registration Statement under the Securities Act, by any Commission or
          the SEC or any other governmental authority for amendments or
          supplements to such Shelf Registration Statement or the related
          Prospectus or for additional information,

               (iii) of the issuance by the SEC or any other governmental
          authority of any stop order suspending the effectiveness of any Shelf
          Registration Statement or the initiation or threatening of any
          proceedings for that purpose,

               (iv) of the receipt by the Company or its legal counsel of any
          notification with respect to the suspension of the qualification or
          exemption from qualification of any of the Registrable Securities for
          sale in any jurisdiction or the initiation or threatening of any
          proceeding for such purpose,

               (v) of the determination by the Company that a post-effective
          amendment to a Shelf Registration Statement or a Subsequent Shelf
          Registration Statement will be filed with the SEC, which notice may,
          at the discretion of the Company (or as required pursuant to Section
          3(j)), state that it constitutes a Suspension Notice, in which event
          the provisions of Section 3(j) shall apply.

          (f) Use its reasonable best efforts to (i) prevent the issuance of,
     and, if issued, to obtain the withdrawal of, any order suspending the
     effectiveness of a Shelf Registration Statement and (ii) obtain the lifting
     of any suspension of the qualification (or exemption from qualification) of
     any of the Registrable Securities for sale in any jurisdiction in which
     they have been qualified for sale, in either case at the earliest possible
     moment, and provide prompt notice to each Notice Holder and the Initial
     Purchaser, and counsel for the Holders and for the Initial Purchaser (or,
     if applicable, separate counsel for the Holders), of the withdrawal or
     lifting of any such order or suspension.

          (g) As promptly as practicable, furnish to each Notice Holder, counsel
     for the Holders and for the Initial Purchaser (or, if applicable, separate
     counsel for the Holders) and the Initial Purchaser, without charge, at
     least one (1) conformed copy of each Shelf Registration Statement and each
     amendment thereto, including financial statements but excluding schedules,
     all documents incorporated or deemed to be incorporated therein by
     reference and all exhibits (unless requested in writing to the Company by
     such Notice Holder, such counsel or the Initial Purchaser).

          (h) During the Effectiveness Period, deliver to each Notice Holder,
     counsel for the Holders and for the Initial Purchaser (or, if applicable,
     separate counsel for the Holders) and the Initial Purchaser, in connection
     with any sale of Registrable Securities pursuant to a Shelf Registration
     Statement, without charge, as many copies of the Prospectus or Prospectuses
     relating to such Registrable Securities (including each preliminary
     prospectus) and any amendment or supplement thereto as such Notice Holder
     or the Initial Purchaser may reasonably request; and the Company hereby
     consents


                                      -16-



     (except during such periods that a Suspension Notice is outstanding and has
     not been revoked) to the use of such Prospectus and each amendment or
     supplement thereto by each Notice Holder, in connection with any offering
     and sale of the Registrable Securities covered by such Prospectus or any
     amendment or supplement thereto in the manner set forth therein.

          (i) Prior to any public offering of the Registrable Securities
     pursuant to a Shelf Registration Statement, use its reasonable best efforts
     to register or qualify or cooperate with the Notice Holders in connection
     with the registration or qualification (or exemption from such registration
     or qualification) of such Registrable Securities for offer and sale under
     Canadian Securities Laws or the securities or Blue Sky laws of such
     jurisdictions within the United States or Canada as any Notice Holder
     reasonably requests in writing (which request may be included in the Notice
     and Questionnaire); use its reasonable best efforts to keep each such
     registration or qualification (or exemption therefrom) effective during the
     Effectiveness Period in connection with such Notice Holder's offer and sale
     of Registrable Securities pursuant to such registration or qualification
     (or exemption therefrom) and do any and all other acts or things reasonably
     necessary or advisable to enable the disposition in such jurisdictions of
     such Registrable Securities in the manner set forth in the relevant Shelf
     Registration Statement and the related Prospectus; provided, however, that
     the Company will not be required to qualify generally to do business in any
     jurisdiction where it is not then so qualified.

          (j) Upon: (A) the occurrence or existence of any pending corporate
     development (a "Material Event") that, in the reasonable discretion of the
     Company, makes it appropriate to suspend the availability of any Shelf
     Registration Statement and the related Prospectus; (B) the issuance by any
     Commission or the SEC of a stop order suspending the effectiveness of any
     Shelf Registration Statement or the initiation of proceedings with respect
     to any Shelf Registration Statement under Canadian Securities Laws or other
     applicable Canadian law or under Section 8(d) or 8(e) of the Securities
     Act; or (C) the occurrence of any event or the existence of any fact as a
     result of which any Shelf Registration Statement shall contain any untrue
     statement of a material fact or omit to state any material fact required to
     be stated therein or necessary to make the statements therein not
     misleading, or any Prospectus shall contain any untrue statement of a
     material fact or omit to state any material fact necessary in order to make
     the statements therein, in the light of the circumstances under which they
     were made, not misleading,

               (i) in the case of clause (A) or (C) above, subject to the
          immediately following two sentences, as promptly as practicable,
          prepare and file, if necessary pursuant to applicable law, a
          post-effective amendment to such Shelf Registration Statement or a
          supplement to such Prospectus or any document incorporated therein by
          reference or file any other required document that would be
          incorporated by reference into such Shelf Registration Statement and
          Prospectus so that such Shelf Registration Statement does not contain
          any untrue statement of a material fact or omit to state any material
          fact required to be stated therein or necessary to make the statements
          therein not misleading, and so that such


                                      -17-



          Prospectus does not contain any untrue statement of a material fact or
          omit to state any material fact necessary in order to make the
          statements therein, in the light of the circumstances under which they
          were made, not misleading, as thereafter delivered to the purchasers
          of the Registrable Securities being sold thereunder, and, in the case
          of a post-effective amendment to a Shelf Registration Statement,
          subject to the next sentence, use its reasonable best efforts to cause
          it to become effective under the Securities Act as promptly as
          practicable, and

               (ii) give notice to the Notice Holders and counsel for the
          Holders and for the Initial Purchaser (or, if applicable, separate
          counsel for the Holders) and to the Initial Purchaser that the
          availability of the Shelf Registration Statement is suspended (a
          "Suspension Notice") (and, upon receipt of any Suspension Notice, each
          Notice Holder agrees not to sell any Registrable Securities pursuant
          to such Shelf Registration Statement until such Notice Holder's
          receipt of copies of the supplemented or amended Prospectus provided
          for in clause (i) above or until such Notice Holder is advised in
          writing by the Company that the Prospectus may be used).

     The Company will use its reasonable best efforts to ensure that the use of
     the Prospectus may be resumed (x) in the case of clause (A) above, as soon
     as, in the reasonable discretion of the Company, such suspension is no
     longer appropriate, (y) in the case of clause (B) above, as promptly as is
     practicable, and (z) in the case of clause (C) above, as soon as, in the
     reasonable judgment of the Company, the Shelf Registration Statement does
     not contain any untrue statement of a material fact or omit to state any
     material fact required to be stated therein or necessary to make the
     statements therein not misleading and the Prospectus does not contain any
     untrue statement of a material fact or omit to state any material fact
     necessary in order to make the statements therein, in the light of the
     circumstances under which they were made, not misleading. The period during
     which the availability of the Shelf Registration Statement and any
     Prospectus may be suspended (the "Suspension Period") without the Company
     incurring any obligation to pay additional interest pursuant to Section
     2(e) shall not exceed thirty (30) days in the aggregate in any three (3)
     month period or sixty (60) days in the aggregate in any twelve (12) month
     period.

          (k) Make available for inspection during normal business hours by
     representatives for the Notice Holders and any underwriters participating
     in any disposition pursuant to any Shelf Registration Statement and any
     broker-dealers, attorneys and accountants retained by such Notice Holders
     or any such underwriters, all relevant financial and other records and
     pertinent corporate documents and properties of the Company and its
     subsidiaries, and cause the appropriate officers, directors and employees
     of the Company and its subsidiaries to make available for inspection during
     normal business hours all relevant information reasonably requested by such
     representatives for the Notice Holders, or any such underwriters,
     broker-dealers, attorneys or accountants in connection with such
     disposition, in each case as is customary for similar "due diligence"
     examinations; provided, however, that such persons shall, at the Company's
     request, first agree in writing with the Company that any information that


                                      -18-



     is designated by the Company in writing as confidential at the time of
     delivery of such information shall be kept confidential by such persons and
     shall be used solely for the purposes of exercising rights under this
     Agreement, unless (i) disclosure of such information is required by court
     or administrative order or is necessary to respond to inquiries of
     governmental or regulatory authorities, (ii) disclosure of such information
     is required by law or necessary to defend or prosecute a claim brought
     against or by any such persons (e.g., to establish a "due diligence"
     defense), (iii) such information becomes generally available to the public
     other than as a result of a disclosure or failure to safeguard by any such
     person or (iv) such information becomes available to any such person from a
     source other than the Company and such source is not bound by a
     confidentiality agreement or is not otherwise under a duty of trust to the
     Company; provided further, that the foregoing inspection and information
     gathering shall, to the greatest extent possible, be coordinated on behalf
     of all the Notice Holders and the other parties entitled thereto by the
     counsel, referred to in Section 5, for the Holders in connection with Shelf
     Registration Statements.

          (l) Comply with all applicable Canadian Securities Laws and the rules
     and regulations of the Commissions and the SEC; and make generally
     available to its securityholders earnings statements (which need not be
     audited) satisfying the provisions of Section 11(a) of the Securities Act
     and Rule 158 thereunder (or any similar rule promulgated under the
     Securities Act), which statements shall cover a period of twelve (12)
     months commencing on the first day of the first fiscal quarter of the
     Company commencing after the effective date of each Shelf Registration
     Statement (within the meaning of Rule 158(c) under the Securities Act), and
     which statements shall be so made generally available to the Company's
     securityholders as follows: (i) with respect to an earnings statement which
     will be contained in one report on Form 40-F (or any other form as may then
     be available for such purpose), such earnings statement shall be made so
     generally available no later than the due date by which the Company is
     required, pursuant to the Exchange Act, to file such report with the SEC;
     and (ii) with respect to an earnings statement which will be contained in
     any combination of reports on Form 40-F or Form 6-K (or any other form(s)
     as may then be available for such purpose), such earnings statement shall
     be made so generally available no later than the due date by which the
     Company is required, pursuant to the Exchange Act, to file the last of such
     reports which together constitute such earnings statement.

          (m) Cooperate with each Notice Holder to facilitate the timely
     preparation and delivery of certificates representing Registrable
     Securities sold pursuant to a Shelf Registration Statement, which
     certificates shall not bear any restrictive legends, and cause such
     Registrable Securities to be in such denominations as are permitted by the
     Indenture and registered in such names as such Notice Holder may request in
     writing at least two (2) Business Days prior to any sale of such
     Registrable Securities.

          (n) Provide a CUSIP number for all Registrable Securities covered by a
     Shelf Registration Statement not later than the effective date of the
     Initial Shelf Registration Statement and provide the Trustee and the
     transfer agent for the Common Shares with certificates for the Registrable
     Securities that are in a form eligible for deposit with The


                                      -19-



     Depository Trust Company.

          (o) Cooperate and assist in any filings required to be made with the
     National Association of Securities Dealers, Inc. and the TSX.

          (p) Upon the filing of the Initial Shelf Registration Statement, and
     upon the effectiveness under the Securities Act of the Initial Shelf
     Registration Statement, announce the same, in each case by release through
     a reputable national newswire service.

          (q) Take all actions and enter into such customary agreements
     (including, if requested, an underwriting agreement in customary form) as
     are necessary, or reasonably requested by the Holders of a majority of the
     Registrable Securities being sold, in order to expedite or facilitate
     disposition of such Registrable Securities; and in such connection, whether
     or not an underwriting agreement is entered into and whether or not the
     registration is an underwritten registration:

               (i) the Company shall make such representations and warranties to
          the Holders of such Registrable Securities and the underwriters, if
          any, in form, substance and scope as would be customarily made by the
          Company to underwriters in similar offerings of securities;

               (ii) the Company shall obtain opinions of counsel of the Company
          and updates thereof (which counsel and opinions (in form, scope and
          substance) shall be reasonably satisfactory to the Managing
          Underwriters, if any, and to the counsel to the Holders of the
          Registrable Securities being sold) addressed to each selling Holder
          and the underwriters, if any, covering the matters that would be
          customarily covered in opinions requested in sales of securities or
          underwritten offerings;

               (iii) the Company shall obtain "comfort letters" and updates
          thereof from the Company's independent certified public accountants
          (and, if necessary, any other independent certified public accountants
          of any subsidiary of the Company or of any business acquired by the
          Company for which financial statements are, or are required to be,
          included in any Shelf Registration Statement) addressed to the
          underwriters, (to the extent consistent with Statement on Auditing
          Standards No. 72 of the American Institute of Certified Public
          Accounts and the relevant standards of the Canadian Institute of
          Chartered Accountants), such letters to be in customary form and
          covering matters of the type that would customarily be covered in
          "comfort letters" to underwriters in connection with similar
          underwritten offerings;

               (iv) the Company shall, if an underwriting agreement is entered
          into, cause any such underwriting agreement to contain indemnification
          provisions and procedures substantially equivalent to the
          indemnification provisions and procedures set forth in Section 6
          hereof with respect to the underwriters and all


                                      -20-



          other parties to be indemnified pursuant to said Section; and

               (v) the Company shall deliver such documents and certificates as
          may be reasonably requested and as are customarily delivered in
          similar offerings to the holders of a majority of the Registrable
          Securities being sold and to the Managing Underwriters, if any;

     the above to be done at (x) the effectiveness of any Shelf Registration
     Statement (and each post-effective amendment thereto) and (y) each closing
     under any underwriting or similar agreement as and to the extent required
     thereunder.

               (r) Cause the Indenture to be qualified under the TIA not later
          than the effective date of the Initial Shelf Registration Statement;
          and, in connection therewith, cooperate with the Trustee to effect
          such changes to the Indenture as may be required for the Indenture to
          be so qualified in accordance with the terms of the TIA and execute,
          and use its reasonable best efforts to cause the Trustee to execute,
          all documents as may be required to effect such changes, and all other
          forms and documents required to be filed with any Commission or the
          SEC to enable the Indenture to be so qualified in a timely manner.

               (s) Cause the Underlying Common Shares to be listed on the NASDAQ
          Global Market and the TSX and make all filings required under
          applicable NASDAQ rules.

               (t) In the event that any broker-dealer registered under the
          Exchange Act shall underwrite any Registrable Securities or
          participate as a member of an underwriting syndicate or selling group
          or "participate in a public offering" (within the meaning of the
          Conduct Rules (the "NASD Rules") of the National Association of
          Securities Dealers, Inc.) thereof, whether as a Holder of such
          Registrable Securities or as an underwriter, a placement or sales
          agent or a broker or dealer in respect thereof, or otherwise, the
          Company will assist such broker-dealer in complying with the
          requirements of such NASD Rules, including, without limitation, by:
          (i) if such NASD Rules, including NASD Rule 2720, shall so require,
          engaging a "qualified independent underwriter" (as defined in NASD
          Rule 2720) to participate in the preparation of the Shelf Registration
          Statement relating to such Registrable Securities, to exercise usual
          standards of due diligence in respect thereof and, if any portion of
          the offering contemplated by such Shelf Registration Statement is an
          underwritten offering or is made through a placement or sales agent,
          to recommend the yield or price, as the case may be, of such
          Registrable Securities; (ii) indemnifying any such qualified
          independent underwriter to the extent of the indemnification of
          underwriters provided in Section 6 hereof; and (iii) providing such
          information to such broker-dealer as may be required in order for such
          broker-dealer to comply with the requirements of the NASD Rules.

     4. Holder's Obligations. Each Holder agrees, by acquisition of the
Registrable Securities, that no Holder of Registrable Securities shall be
entitled to sell any of such Registrable Securities pursuant to a Shelf
Registration Statement or to receive a Prospectus


                                      -21-



relating thereto, unless such Holder has furnished the Company with a Notice and
Questionnaire as required pursuant to Section 2(d) hereof (including the
information required to be included in such Notice and Questionnaire) and the
information set forth in the next sentence. Each Notice Holder agrees promptly
to furnish to the Company all information required to be disclosed in order to
make the information previously furnished to the Company by such Notice Holder
not misleading and any other information regarding such Notice Holder and the
distribution of such Registrable Securities as the Company may from time to time
reasonably request. Any sale of any Registrable Securities by any Holder shall
constitute a representation and warranty by such Holder that the Holder
Information of such Holder furnished in writing by or on behalf of such Holder
to the Company does not include an untrue statement of a material fact or omit
to state a material fact necessary in order to make the statements in such
Holder Information, in the light of the circumstances under which they were
made, not misleading.

     5. Registration Expenses. The Company shall bear all fees and expenses
incurred in connection with the performance by the Company of its obligations
under Section 2 and Section 3 of this Agreement whether or not any of the Shelf
Registration Statements are filed or become effective under Canadian Securities
Laws and the Securities Act. Such fees and expenses ("Registration Expenses")
shall include, without limitation, (i) all registration and filing fees and
expenses (including, without limitation, fees and expenses (x) with respect to
filings required to be made with the National Association of Securities Dealers,
Inc., the NASDAQ Global Market and the TXS and (y) of compliance with Canadian
Securities Laws, U.S. federal securities laws and state securities or Blue Sky
laws (including, without limitation, reasonable fees and disbursements of
counsel for the Holders in connection with Blue Sky qualifications of the
Registrable Securities under the laws of such jurisdictions as the Notice
Holders of a majority of the Registrable Securities being sold pursuant to a
Shelf Registration Statement may designate), (ii) all printing expenses
(including, without limitation, expenses of printing certificates for
Registrable Securities in a form eligible for deposit with The Depository Trust
Company and printing Prospectuses), (iii) all duplication and mailing expenses
relating to copies of any Shelf Registration Statement or Prospectus delivered
to any Holders hereunder, (iv) all fees and disbursements of counsel for the
Company and the fees and disbursements of one counsel for the Holders in
connection with the Shelf Registration Statement, (v) all fees and disbursements
of the Trustee and its counsel and of the registrar and transfer agent for the
Common Shares and (vi) Securities Act liability or other insurance obtained by
the Company in its sole discretion. In addition, the Company shall pay the
internal expenses of the Company (including, without limitation, all salaries
and expenses of officers and employees performing legal or accounting duties),
the expense of any annual audit or quarterly review, the fees and expenses
incurred in connection with the listing by the Company of the Registrable
Securities on any securities exchange or quotation system on which similar
securities of the Company are then listed and the fees and expenses of any
person, including, without limitation, special experts, retained by the Company.
If the Company shall, pursuant to Rule 456(b), defer payment of any registration
fees due under the Securities Act with respect to any Registration Statement,
the Company agrees that it shall pay the fees applicable to such Registration
Statement within the time required by Rule 456(b)(1)(i) (without reliance on the
proviso to Rule 456(b)(1)(i)) and in compliance with Rule 456(b) and Rule
457(r).

     6. Indemnification, Contribution.


                                      -22-



     (a) The Company agrees to indemnify, defend and hold harmless the Initial
Purchaser, each Holder, each person (a "Controlling Person"), if any, who
controls the Initial Purchaser or Holder within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act and the respective officers,
directors, partners, employees, representatives and agents of the Initial
Purchaser, the Holders or any Controlling Person (each, a "Holder Indemnified
Party"), from and against any loss, damage, expense, liability, claim or any
actions in respect thereof (including the reasonable cost of investigation)
which such Holder Indemnified Party may incur or become subject to under
Canadian Securities Laws, the Securities Act, the Exchange Act or otherwise,
insofar as such loss, damage, expense, liability, claim or action arises out of
or is based upon any untrue statement or alleged untrue statement of a material
fact contained in any Shelf Registration Statement or Prospectus, including any
document incorporated by reference therein, or in any amendment or supplement
thereto or in any preliminary prospectus, or arises out of or is based upon any
omission or alleged omission to state a material fact required to be stated in
any Shelf Registration Statement or in any amendment or supplement thereto or
necessary to make the statements therein not misleading, or arises out of or is
based upon any omission or alleged omission to state a material fact necessary
in order to make the statements made in any Prospectus or in any amendment or
supplement thereto or in any preliminary prospectus, in the light of the
circumstances under which such statements were made, not misleading, and the
Company shall reimburse, as incurred, the Holder Indemnified Parties for any
legal or other expenses reasonably incurred by them in connection with
investigating or defending any such loss, damage, expense, liability, claim or
action in respect thereof; provided, however, that the Company shall not be
required to provide any indemnification pursuant to this Section 6(a) in any
such case insofar as any such loss, damage, expense, liability, claim or action
arises out of or is based upon any untrue statement or omission or alleged
untrue statement or omission of a material fact contained in, or omitted from,
and in conformity with information furnished in writing by or on behalf of the
Initial Purchaser or a Holder to the Company expressly for use in, any Shelf
Registration Statement or any Prospectus or furnished to the Company by a Holder
in a duly executed Notice and Questionnaire; provided further, however, that
this indemnity agreement will be in addition to any liability which the Company
may otherwise have to such Holder Indemnified Party.

     (b) Each Holder, severally and not jointly, agrees to indemnify, defend and
hold harmless the Company, its subsidiaries and their respective directors,
officers, employees, representatives and agents and any person who controls the
Company within the meaning of Section 15 of the Securities Act or Section 20 of
the Exchange Act (each, a "Company Indemnified Party") from and against any
loss, damage, expense, liability, claim or any actions in respect thereof
(including the reasonable cost of investigation) which such Company Indemnified
Party may incur or become subject to under Canadian Securities Laws, the
Securities Act, the Exchange Act or otherwise, insofar as such loss, damage,
expense, liability, claim or action arises out of or is based upon any untrue
statement or alleged untrue statement of a material fact contained in, and in
conformity with information (the "Holder Information") furnished in writing by
or on behalf of such


                                      -23-



Holder to the Company expressly for use in, any Shelf Registration Statement or
Prospectus, or arises out of or is based upon any omission or alleged omission
to state a material fact in connection with such Holder Information, which
material fact was not contained in such Holder Information, and which material
fact was either required to be stated in any Shelf Registration Statement or
Prospectus or necessary to make such Holder Information not misleading; and,
subject to the limitation set forth in the immediately preceding clause, each
Holder shall reimburse, as incurred, the Company for any legal or other expenses
reasonably incurred by the Company or any other such person in connection with
investigating or defending any loss, damage, expense, liability, claim or action
in respect thereof. This indemnity agreement will be in addition to any
liability which such Holder may otherwise have to the Company or any other such
persons. In no event shall the liability of any selling Holder of Registrable
Securities hereunder be greater in amount than the dollar amount of the proceeds
received by such Holder upon the sale, pursuant to the Shelf Registration
Statement, of the Registrable Securities giving rise to such indemnification
obligation.

     (c) If any action, suit or proceeding (each, a "Proceeding") is brought
against any person in respect of which indemnity may be sought pursuant to
either Section 6(a) or Section 6(b), such person (the "Indemnified Party") shall
promptly notify the person against whom such indemnity may be sought (the
"Indemnifying Party") in writing of the institution of such Proceeding and the
Indemnifying Party shall assume the defense of such Proceeding; provided,
however, that the omission to so notify such Indemnifying Party shall not
relieve such Indemnifying Party from any liability which it may have to such
Indemnified Party or otherwise except to the extent the failure to so notify
materially prejudices the Indemnifying Party's ability to defend the Proceeding.
Such Indemnified Party shall have the right to employ its own counsel in any
such case, but the fees and expenses of such counsel shall be at the expense of
such Indemnified Party unless the employment of such counsel shall have been
authorized in writing by such Indemnifying Party in connection with the defense
of such Proceeding or such Indemnifying Party shall not have employed counsel to
have charge of the defense of such Proceeding within thirty (30) days of the
receipt of notice thereof or such Indemnified Party shall have reasonably
concluded upon the written advice of counsel that there may be one or more
defenses available to it that are different from, additional to or in conflict
with those available to such Indemnifying Party (in which case such Indemnifying
Party shall not have the right to direct that portion of the defense of such
Proceeding on behalf of the Indemnified Party, but such Indemnifying Party may
employ counsel and participate in the defense thereof but the fees and expenses
of such counsel shall be at the expense of such Indemnifying Party), in any of
which events such reasonable fees and expenses shall be borne by such
Indemnifying Party and paid as incurred (it being understood, however, that such
Indemnifying Party shall not be liable for the expenses of more than one
separate counsel in any one Proceeding or series of related Proceedings together
with reasonably necessary local counsel representing the Indemnified Parties who
are parties to such action). An Indemnifying Party shall not be liable for any
settlement of such Proceeding effected without the written consent of such
Indemnifying Party, but if settled with the written consent of such Indemnifying
Party, such Indemnifying Party agrees to indemnify and hold harmless an
Indemnified Party


                                      -24-



from and against any loss or liability by reason of such settlement.
Notwithstanding the foregoing sentence, if at any time an Indemnified Party
shall have requested an Indemnifying Party to reimburse such Indemnified Party
for fees and expenses of counsel as contemplated by the second sentence of this
paragraph, then such Indemnifying Party agrees that it shall be liable for any
settlement of any Proceeding effected without its written consent if (i) such
settlement is entered into more than sixty (60) Business Days after receipt by
such Indemnifying Party of the aforesaid request, (ii) such Indemnifying Party
shall not have fully reimbursed such Indemnified Party in accordance with such
request prior to the date of such settlement and (iii) such Indemnified Party
shall have given such Indemnifying Party at least thirty (30) days' prior notice
of its intention to settle. No Indemnifying Party shall, without the prior
written consent of any Indemnified Party, effect any settlement of any pending
or threatened Proceeding in respect of which such Indemnified Party is or could
have been a party and indemnity could have been sought hereunder by such
Indemnified Party, unless such settlement includes an unconditional release of
such Indemnified Party from all liability on claims that are the subject matter
of such Proceeding and does not include an admission of fault or culpability or
a failure to act by or on behalf of such Indemnified Party.

     (d) If the indemnification provided for in this Section 6 is unavailable to
an Indemnified Party under Section 6(a) or Section 6(b), or insufficient to hold
such Indemnified Party harmless, in respect of any losses, damages, expenses,
liabilities, claims or actions referred to therein, then each applicable
Indemnifying Party, in lieu of indemnifying such Indemnified Party, shall
contribute to the amount paid or payable by such Indemnified Party as a result
of such losses, damages, expenses, liabilities, claims or actions (i) in such
proportion as is appropriate to reflect the relative benefits received by the
Company, on the one hand, and by the Holders or the Initial Purchaser, on the
other hand, from the offering of the Registrable Securities or (ii) if the
allocation provided by clause (i) above is not permitted by applicable law, in
such proportion as is appropriate to reflect not only the relative benefits
referred to in clause (i) above but also the relative fault of the Company, on
the one hand, and of the Holders or the Initial Purchaser, on the other hand, in
connection with the statements or omissions which resulted in such losses,
damages, expenses, liabilities, claims or actions, as well as any other relevant
equitable considerations. The relative fault of the Company, on the one hand,
and of the Holders or the Initial Purchaser, on the other hand, shall be
determined by reference to, among other things, whether the untrue statement or
alleged untrue statement of a material fact or omission or alleged omission
relates to information supplied by the Company or by the Holders or the Initial
Purchaser and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The amount paid or
payable by a party as a result of the losses, damages, expenses, liabilities,
claims and actions referred to above shall be deemed to include any reasonable
legal or other fees or expenses reasonably incurred by such party in connection
with investigating or defending any Proceeding.

     (e) The Company, the Holders and the Initial Purchaser agree that it would
not be just and equitable if contribution pursuant to this Section 6 were
determined by pro rata allocation or by any other method of allocation which
does not take account of the


                                      -25-



equitable considerations referred to in Section 6(d) above. Notwithstanding the
provisions of this Section 6, no Holder shall be required to contribute any
amount in excess of the amount by which the total price at which the Registrable
Securities giving rise to such contribution obligation and sold by such Holder
were offered to the public exceeds the amount of any damages which it has
otherwise been required to pay by reason of such untrue or alleged untrue
statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation. The Holders' respective obligations to contribute
pursuant to this Section 6 are several in proportion to the respective amount of
Registrable Securities they have sold pursuant to a Shelf Registration
Statement, and not joint. The remedies provided for in this Section 6 are not
exclusive and shall not limit any rights or remedies which may otherwise be
available to any indemnified party at law or in equity.

     (f) The indemnity and contribution provisions contained in this Section 6
shall remain operative and in full force and effect regardless of (i) any
termination of this Agreement, (ii) any investigation made by or on behalf of
any Holder or the Initial Purchaser or any person controlling any Holder or the
Initial Purchaser, or the Company, or the Company's officers or directors or any
person controlling the Company and (iii) the sale of any Registrable Security by
any Holder.

7. Information Requirements.

     (a) The Company covenants that, if at any time before the end of the
Effectiveness Period it is neither subject to the reporting requirements of
Section 13 or Section 15(d) of the Exchange Act nor exempt from registration
under Section 12 of the Exchange Act pursuant to Rule 12g3-2(b), it will
cooperate with any Holder of Registrable Securities and take such further action
as any Holder of Registrable Securities may reasonably request in writing
(including, without limitation, making such representations as any such Holder
may reasonably request), all to the extent required from time to time to enable
such Holder to sell Registrable Securities without registration under the
Securities Act within the limitations of the exemptions provided by Rule 144 and
Rule 144A under the Securities Act and customarily taken in connection with
sales pursuant to such exemptions. Upon the written request of any Holder, the
Company shall deliver to such Holder a written statement as to whether the
Company has complied with the reporting requirements of Canadian Securities Laws
and the Exchange Act, unless such a statement has been included in the Company's
most recent report, for purposes of Rule 144 under the Securities Act, filed
with the SEC pursuant to Section 13 or Section 15(d) of Exchange Act.

8. Underwritten Registrations.

     (a) If any of the Registrable Securities covered by the Shelf Registration
Statement are to be offered and sold in an underwritten offering, the investment
banker or investment bankers and manager or managers that will administer the
offering


                                      -26-



("Managing Underwriters") shall be selected by the holders of a majority of such
Registrable Securities to be included in such offering and shall be reasonably
acceptable to the Company.

     (b) No person may participate in any underwritten registration hereunder
unless such person (i) agrees to sell such person's Registrable Securities on
the basis reasonably provided in any underwriting arrangements approved by the
persons entitled hereunder to approve such arrangements and (ii) completes and
executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents reasonably required under the terms of such
underwriting arrangements.

     9. Additional Amounts. All payments of additional interest hereunder to, or
for the benefit of, a Holder, other than an Excluded Holder, shall be
accompanied by additional payments, in cash, of Additional Amounts.

     10. Miscellaneous.

          (a) Remedies. The Company acknowledges and agrees that any failure by
     the Company to comply with its obligations under this Agreement may result
     in material irreparable injury to the Initial Purchaser and the Holders for
     which there is no adequate remedy at law, that it will not be possible to
     measure damages for such injuries precisely and that, in the event of any
     such failure, any Initial Purchaser or Holder may obtain such relief as may
     be required to specifically enforce the Company's obligations under this
     Agreement. The Company further agrees to waive the defense in any action
     for specific performance that a remedy at law would be adequate.
     Notwithstanding the foregoing two sentences, this Section 10(a) shall not
     apply to the subject matter referred to in and contemplated by Section
     2(e).

          (b) Amendments and Waivers. The provisions of this Agreement,
     including the provisions of this sentence, may not be amended, modified or
     supplemented, and waivers or consents to departures from the provisions
     hereof may not be given, unless the Company has obtained the written
     consent of Holders of a majority of outstanding Registrable Securities;
     provided, however, that, no consent is necessary from any of the Holders in
     the event that this Agreement is amended, modified or supplemented for the
     purpose of curing any ambiguity, defect or inconsistency that does not
     adversely affect the rights of any Holders. Notwithstanding the foregoing,
     a waiver or consent to depart from the provisions hereof with respect to a
     matter that relates exclusively to the rights of Holders of Registrable
     Securities whose securities are being sold pursuant to a Shelf Registration
     Statement and that does not directly or indirectly affect the rights of
     other Holders of Registrable Securities may be given by Holders of at least
     a majority of the Registrable Securities being sold by such Holders
     pursuant to such Shelf Registration Statement; provided, however, that the
     provisions of this sentence may not be amended, modified, or supplemented
     except in accordance with the provisions of the immediately preceding
     sentence. Each Holder of Registrable Securities outstanding at the time of
     any such amendment, modification, supplement, waiver or consent or
     thereafter shall be bound by any such amendment, modification, supplement,
     waiver or consent effected


                                      -27-




     pursuant to this Section 10(b), whether or not any notice, writing or
     marking indicating such amendment, modification, supplement, waiver or
     consent appears on the Registrable Securities or is delivered to such
     Holder.

          (c) Notices. All notices and other communications provided for or
     permitted hereunder shall be made in writing by hand delivery, by
     telecopier, by courier guaranteeing overnight delivery or by first-class
     mail, return receipt requested, and shall be deemed given (A) when made, if
     made by hand delivery, (B) upon confirmation, if made by telecopier, (C)
     one (1) Business Day after being deposited with such courier, if made by
     overnight courier or (D) on the date indicated on the notice of receipt, if
     made by first-class mail, to the parties as follows:

          (i) if to a Holder, at the most current address given by such Holder
     to the Company in a Notice and Questionnaire or any amendment thereto;

          (ii)  if to the Company, to:

                Neurochem Inc.
                275 Armand-Frappier Boulevard
                Laval, Quebec H7V 4A7
                Canada
                Attention: General Counsel
                Telecopy No.: (450) 680-4501

                with copy to:

                Davies Ward Phillips & Vineberg LLP
                1501 McGill College
                26th Floor
                Montreal, Quebec
                H3A 3N1

          (iii) if to the Initial Purchaser, to:

                UBS Securities LLC
                299 Park Avenue
                New York, New York 10171
                Attention: Syndicate Department
                Telecopy No.: (212) 713-1205

                with a copy to (for informational purposes only):

                UBS Securities LLC
                299 Park Avenue


                                      -28-



                New York, New York 10171
                Attention: Legal Department
                Telecopy No.: (212) 821-4042

                and

                UBS Securities LLC
                677 Washington Boulevard
                Stamford, Connecticut 06901
                Attention: Syndicate Department
                Telecopy No.: (203) 719-0683

or to such other address as such person may have furnished to the other persons
identified in this Section 10(c) in writing in accordance herewith.

     (d) Majority of Registrable Securities. For purposes of determining what
constitutes holders of a majority of Registrable Securities, as referred to in
this Agreement, a majority shall constitute a majority in aggregate principal
amount of Registrable Securities, treating each relevant holder of Underlying
Common Shares as a holder of the aggregate principal amount of Notes in respect
of which such Underlying Common Shares were issued.

     (e) Approval of Holders. Whenever the consent or approval of Holders of a
specified percentage of Registrable Securities is required hereunder,
Registrable Securities held by the Company or its "affiliates" (as such term is
defined in Rule 405 under the Securities Act) (other than the Initial Purchaser
or subsequent Holders of Registrable Securities, if the Initial Purchaser or
such subsequent Holders are deemed to be such affiliates solely by reason of
their holdings of such Registrable Securities) shall not be counted in
determining whether such consent or approval was given by the Holders of such
required percentage.

     (f) Third Party Beneficiaries. The Holders shall be third party
beneficiaries to the agreements made hereunder between the Company, on the one
hand, and the Initial Purchaser, on the other hand, and shall have the right to
enforce such agreements directly to the extent they may deem such enforcement
necessary or advisable to protect their rights or the rights of Holders
hereunder and shall be deemed to be bound by the provisions of this Agreement.
The Trustee shall be entitled to the rights granted to it pursuant to this
Agreement.

     (g) Successors and Assigns. Any person who purchases any Covered Security
from the Initial Purchaser or from any Holder shall be deemed, for purposes of
this Agreement, to be an assignee of the Initial Purchaser or such Holder, as
the case may be and shall be deemed to be bound by the provisions of this
Agreement. This Agreement shall inure to the benefit of and be binding upon the
respective successors and assigns of each of the parties hereto and shall inure
to the benefit of and be binding upon each Holder of any Covered Security.


                                      -29-



     (h) Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be original and all of which taken together
shall constitute one and the same agreement.

     (i) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

     (j) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS
OF LAWS PRINCIPLES THEREOF.

     (k) Severability. If any term, provision, covenant or restriction of this
Agreement is held to be invalid, illegal, void or unenforceable, the remainder
of the terms, provisions, covenants and restrictions set forth herein shall
remain in full force and effect and shall in no way be affected, impaired or
invalidated thereby, and the parties hereto shall use their reasonable best
efforts to find and employ an alternative means to achieve the same or
substantially the same result as that contemplated by such term, provision,
covenant or restriction, it being intended that all of the rights and privileges
of the parties shall be enforceable to the fullest extent permitted by law.

     (l) Entire Agreement. This Agreement is intended by the parties hereto as a
final expression of their agreement and is intended to be a complete and
exclusive statement of the agreement and understanding of the parties hereto in
respect of the subject matter contained herein and the registration rights
granted by the Company with respect to the Registrable Securities. Except as
provided in the Purchase Agreement, there are no restrictions, promises,
warranties or undertakings, other than those set forth or referred to herein,
with respect to the registration rights granted by the Company with respect to
the Registrable Securities. This Agreement supersedes all prior agreements and
undertakings among the parties with respect to such registration rights. No
party hereto shall have any rights, duties or obligations other than those
specifically set forth in this Agreement.

     (m) Termination. This Agreement and the obligations of the parties
hereunder shall terminate upon the end of the Effectiveness Period, except for
any liabilities or obligations under Section 4, Section 5 or Section 6 hereof
and the obligations to make payments of and provide for additional interest
under Section 2(e) hereof to the extent such additional interest accrues prior
to the end of the Effectiveness Period and to the extent any overdue additional
interest accrues in accordance with the last paragraph of such Section 2(e),
each of which shall remain in effect in accordance with its terms.

     (n) Submission to Jurisdiction. Except as set forth below, no claim,
counterclaim or dispute of any kind or nature whatsoever arising out of or in
any way relating to this Agreement ("Claim") may be commenced, prosecuted or
continued in any


                                      -30-



court other than the courts of the State of New York located in the City and
County of New York or in the United States District Court for the Southern
District of New York, which courts shall have jurisdiction over the adjudication
of such matters, and the Company hereby consents to the jurisdiction of such
courts and personal service with respect thereto. The Company hereby consents to
personal jurisdiction, service and venue in any court in which any Claim arising
out of or in any way relating to this Agreement is brought by any third party
against the Initial Purchaser. THE COMPANY HEREBY WAIVES ALL RIGHTS TO TRIAL BY
JURY IN ANY PROCEEDING (WHETHER BASED UPON CONTRACT, TORT OR OTHERWISE) IN ANY
WAY ARISING OUT OF OR RELATING TO THIS AGREEMENT. The Company agrees that a
final judgment in any such Proceeding brought in any such court shall be
conclusive and binding upon the Company and may be enforced in any other courts
in the jurisdiction of which the Company is or may be subject, by suit upon such
judgment.

[THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS]


                                      -31-



          IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first written above.

                                        Very truly yours,

                                        NEUROCHEM INC.


                                        By: /s/ David Skinner
                                            ------------------------------------
                                            Name:  David Skinner
                                            Title: Vice President,
                                                   General Counsel and
                                                   Corporate Secretary



Accepted and agreed to as of the date
first above written:

UBS SECURITIES LLC


By: /s/ Sage Kelly
    ---------------------------------
    Name:  Sage Kelly
    Title:
       ------------------------------


By: /s/ Kevin Sheridan
    ---------------------------------
    Name:  Kevin Sheridan
    Title:
       ------------------------------


================================================================================

                                 NEUROCHEM INC.

                                       and

                              THE BANK OF NEW YORK

                                   as Trustee

                                   ----------

                                    INDENTURE

                          Dated as of November 9, 2006

                                   ----------

                       Up to $42,085,000 Principal Amount

                      6% CONVERTIBLE SENIOR NOTES DUE 2026

================================================================================



                              CROSS-REFERENCE TABLE



TIA                                                                Indenture
Section                                                             Section
- -------                                                        -----------------
                                                            
310(a)(1)...................................................   7.10
   (a)(2)...................................................   7.10
   (a)(3)...................................................   N.A.
   (a)(4)...................................................   N.A.
   (a)(5)...................................................   N.A.
   (b)......................................................   7.08; 7.10; 11.02
   (c)......................................................   N.A.
311(a)......................................................   7.11
   (b)......................................................   7.11
   (c)......................................................   N.A.
312(a)......................................................   2.05
   (b)......................................................   11.03
   (c)......................................................   11.03
313(a)......................................................   7.06
   (b)(1)...................................................   N.A.
   (b)(2)...................................................   7.06
   (c)......................................................   7.06; 11.02
   (d)......................................................   7.06
314(a)......................................................   4.03
   (b)......................................................   N.A.
   (c)(1)...................................................   11.04
   (c)(2)...................................................   11.04
   (c)(3)...................................................   N.A.
   (d)......................................................   N.A.
   (e)......................................................   11.05
   (f)......................................................   N.A.
315(a)......................................................   7.01(B)
   (b)......................................................   7.05; 11.02
   (c)......................................................   7.01(A)
   (d)......................................................   7.01(C)
   (e)......................................................   6.11
316(a) (last sentence)......................................   2.09
   (a)(1)(A)................................................   6.05
   (a)(1)(B)................................................   6.04
   (a)(2)...................................................   N.A.
   (b)......................................................   6.07
   (c)......................................................   N.A.
317(a)(1)...................................................   6.08
   (a)(2)...................................................   6.09
   (b)......................................................   2.04
318(a)......................................................   11.01



                                        I



                                TABLE OF CONTENTS



                                                                            Page
                                                                            ----
                                                                         
I.    DEFINITIONS AND INCORPORATION BY REFERENCE ........................     1

      1.01  Definitions .................................................     1
      1.02  Other Definitions ...........................................     6
      1.03  Incorporation by Reference of Trust Indenture Act ...........     8
      1.04  Rules of Construction .......................................     8

II.   THE SECURITIES ....................................................     9

      2.01  Form and Dating .............................................     9
      2.02  Execution and Authentication ................................    10
      2.03  Registrar, Paying Agent and Conversion Agent ................    11
      2.04  Paying Agent to Hold Money in Trust .........................    11
      2.05  Securityholder Lists ........................................    11
      2.06  Transfer and Exchange .......................................    12
      2.07  Replacement Securities ......................................    12
      2.08  Outstanding Securities ......................................    12
      2.09  Securities Held by the Company or an Affiliate ..............    13
      2.10  Temporary Securities ........................................    13
      2.11  Cancellation ................................................    14
      2.12  Defaulted Interest ..........................................    14
      2.13  CUSIP Numbers ...............................................    14
      2.14  Deposit of Moneys ...........................................    14
      2.15  Book-Entry Provisions for Global Securities .................    15
      2.16  Special Transfer Provisions .................................    16
      2.17  Restrictive Legends .........................................    19
      2.18  Ranking .....................................................    20

III.  REDEMPTION AND REPURCHASE .........................................    20

      3.01  Right of Redemption .........................................    20
      3.02  Notices to Trustee ..........................................    21
      3.03  Selection of Securities to Be Redeemed ......................    21
      3.04  Notice of Redemption ........................................    21
      3.05  Effect of Notice of Redemption ..............................    23
      3.06  Deposit of Redemption Price .................................    23
      3.07  Securities Redeemed in Part .................................    23
      3.08  Purchase of Securities at Option of the Holder ..............    24
      3.09  Offer to Repurchase at Option of Holder Upon a Change in
               Control ..................................................    28
      3.10  Redemption of Securities for Tax Reasons ....................    34



                                       -i-




                                                                         
IV.   COVENANTS .........................................................    38

      4.01  Payment of Securities .......................................    38
      4.02  Maintenance of Office or Agency .............................    38
      4.03  Rule 144A Information and Annual Reports ....................    39
      4.04  Compliance Certificate ......................................    39
      4.05  Stay, Extension and Usury Laws ..............................    40
      4.06  Corporate Existence .........................................    40
      4.07  Notice of Default ...........................................    40
      4.08  Payment of Additional Amounts ...............................    40
      4.09  Further Instruments and Acts ................................    42

V.    SUCCESSORS ........................................................    42

      5.01  When Company May Merge, etc. ................................    42
      5.02  Successor Substituted .......................................    43

VI.   DEFAULTS AND REMEDIES .............................................    43

      6.01  Events of Default ...........................................    43
      6.02  Acceleration ................................................    45
      6.03  Other Remedies ..............................................    46
      6.04  Waiver of Past Defaults .....................................    46
      6.05  Control by Majority .........................................    46
      6.06  Limitation on Suits .........................................    46
      6.07  Rights of Holders to Receive Payment ........................    47
      6.08  Collection Suit by Trustee ..................................    47
      6.09  Trustee May File Proofs of Claim ............................    47
      6.10  Priorities ..................................................    48
      6.11  Undertaking for Costs .......................................    48

VII.  TRUSTEE ...........................................................    48

      7.01  Duties of Trustee ...........................................    48
      7.02  Rights of Trustee ...........................................    49
      7.03  Individual Rights of Trustee ................................    51
      7.04  Trustee's Disclaimer ........................................    51
      7.05  Notice of Defaults ..........................................    51
      7.06  Reports by Trustee to Holders ...............................    51
      7.07  Compensation and Indemnity ..................................    51
      7.08  Replacement of Trustee ......................................    52
      7.09  Successor Trustee by Merger, etc. ...........................    53
      7.10  Eligibility; Disqualification ...............................    53
      7.11  Preferential Collection of Claims Against Company ...........    53

VIII. DISCHARGE OF INDENTURE ............................................    53

      8.01  Termination of the Obligations of the Company ...............    53



                                      -ii-




                                                                         
      8.02  Application of Trust Money ..................................    54
      8.03  Repayment to Company ........................................    54
      8.04  Reinstatement ...............................................    54

IX.   AMENDMENTS ........................................................    55

      9.01  Without Consent of Holders ..................................    55
      9.02  With Consent of Holders .....................................    55
      9.03  Compliance with Trust Indenture Act .........................    57
      9.04  Revocation and Effect of Consents ...........................    57
      9.05  Notation on or Exchange of Securities .......................    57
      9.06  Trustee Protected ...........................................    57

X.    CONVERSION ........................................................    58

      10.01 Conversion Privilege; Restrictive Legends ...................    58
      10.02 Conversion Procedure and Payment Upon Conversion ............    61
      10.03 Taxes on Conversion .........................................    67
      10.04 Company to Provide Stock ....................................    67
      10.05 Adjustment of Conversion Rate ...............................    68
      10.06 No Adjustment ...............................................    72
      10.07 Other Adjustments ...........................................    73
      10.08 Adjustments for Tax Purposes ................................    74
      10.09 Notice of Adjustment ........................................    74
      10.10 Notice of Certain Transactions ..............................    74
      10.11 Effect of Reclassifications, Consolidations, Mergers,
               Binding Share Exchanges or Sales on Conversion
               Privilege ................................................    74
      10.12 Trustee's Disclaimer ........................................    77
      10.13 Rights Distributions Pursuant to Shareholders' Rights
               Plans ....................................................    77
      10.14 Increased Conversion Rate Applicable to Certain Notes
               Surrendered in Connection With Make-Whole Fundamental
               Changes ..................................................    78
      10.15 Adjustment to the Conversion Rate from, and including,
               October 15, 2009 to, and including, November 15, 2009 ....    81
      10.16 Mandatory Conversion at the Company's Election ..............    82

XI.   MISCELLANEOUS .....................................................    83

      11.01 Trust Indenture Act Controls ................................    83
      11.02 Notices .....................................................    83
      11.03 Communication by Holders with Other Holders .................    84
      11.04 Certificate and Opinion as to Conditions Precedent ..........    84
      11.05 Statements Required in Certificate or Opinion ...............    85
      11.06 Rules by Trustee and Agents .................................    85
      11.07 Legal Holidays ..............................................    85
      11.08 Duplicate Originals .........................................    85
      11.09 Governing Law ...............................................    86
      11.10 No Adverse Interpretation of Other Agreements ...............    86



                                      -iii-



                                                                         
      11.11 Successors ..................................................    86
      11.12 Separability ................................................    86
      11.13 Table of Contents, Headings, etc ............................    86
      11.14 Calculations in Respect of the Securities ...................    86
      11.15 Agent for Service of Process ................................    86


Exhibit A   - Form of Global Security
Exhibit B-1 - Form of Private Placement Legend
Exhibit B-2 - Form of Legend for Global Security
Exhibit C   - Form of Notice of Transfer Pursuant to Registration Statement
Exhibit D   - Form of Opinion of Counsel in Connection with Registration of
              Securities
Exhibit E   - Form of Certificate in Connection with Transfers to non-QIB
              Investors in the United States
Exhibit F-1 - Form of Transferor Certificate in Connection with Transfers
              Pursuant to Regulation S
Exhibit F-2 - Form of Transferee Certificate in Connection with Transfers
              Pursuant to Regulation S


                                      -iv-



     INDENTURE, dated as of November 9, 2006, between Neurochem Inc., a
corporation organized under the Canada Business Corporations Act (the
"COMPANY"), and The Bank of New York, as trustee (the "TRUSTEE").

     Each party agrees as follows for the benefit of the other party and for the
equal and ratable benefit of the Holders of the Company's 6% Convertible Senior
Notes due 2026 (the "SECURITIES").

                  I. DEFINITIONS AND INCORPORATION BY REFERENCE

1.01 DEFINITIONS.

     "ACCREDITED INVESTOR" means an "accredited investor," as defined in Rule
501 of Regulation D.

     "ACCREDITED INVESTOR CERTIFICATED SECURITY" means a certificated Security
in registered form, duly executed by the Company and authenticated by the
Trustee, and issued in the name of an Accredited Investor.

     The term "ADDITIONAL INTEREST" has the meaning ascribed to it in the
Registration Rights Agreement.

     "AFFILIATE" means any person directly or indirectly controlling or
controlled by or under direct or indirect common control with the Company. For
this purpose, "control" shall mean the power to direct the management and
policies of a person through the ownership of securities, by contract or
otherwise.

     "ASSET SALE MAKE-WHOLE FUNDAMENTAL CHANGE" means a sale, transfer, lease,
conveyance or other disposition of all or substantially all of the property or
assets of the Company, or of the Company and the Subsidiaries on a consolidated
basis, to any "person" or "group" (as such terms are used in Sections 13(d) and
14(d) of the Exchange Act), including any group acting for the purpose of
acquiring, holding, voting or disposing of securities within the meaning of Rule
13d-5(b)(1) under the Exchange Act.

     "BID SOLICITATION AGENT" means a Company-appointed agent that performs
calculations as set forth in ARTICLE X and PARAGRAPH 11 of the Securities.

     "BOARD OF DIRECTORS" means the Board of Directors of the Company or any
committee thereof authorized to act for it hereunder.

     "BOARD RESOLUTION" means a copy of a resolution certified by the Secretary
or an Assistant Secretary of the Company to have been duly adopted by the Board
of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.

     "CAPITAL STOCK" of any Person means any and all shares, interests,
participations or other equivalents (however designated) of capital stock of
such Person and all warrants or options to acquire such capital stock.


                                      -1-



     "CLOSING SALE PRICE" means the price of a Common Share on the relevant
date, determined (a) on the basis of the closing sale price per Common Share (or
if no closing sale price per Common Share is reported, the average of the bid
and ask prices per Common Share or, if more than one in either case, the average
of the average bid and the average ask prices per Common Share) on such date on
the U.S. principal national securities exchange on which the Common Shares are
listed; or (b) if the Common Shares are not listed on a U.S. national securities
exchange, as reported by National Quotation Bureau, Incorporated or a similar
organization. In the absence of a quotation, the Closing Sale Price shall be
such price as the Company shall reasonably determine on the basis of such
quotations as most accurately reflecting the price that a fully informed buyer,
acting on his own accord, would pay to a fully informed seller, acting on his
own accord in an arms-length transaction, for a Common Share.

     "COMMON SHARES" means the common shares, without nominal or par value, of
the Company.

     "COMMON SHARES CHANGE MAKE-WHOLE FUNDAMENTAL CHANGE" means any transaction
or series of related transactions (other than a Listed Stock Business
Combination), in connection with which (whether by means of an exchange offer,
liquidation, tender offer, consolidation, amalgamation, statutory arrangement,
merger, combination, reclassification, recapitalization, asset sale, lease of
assets or otherwise) the Common Shares are exchanged for, converted into,
acquired for or constitute solely the right to receive other securities, other
property, assets or cash.

     "COMPANY" means the party named as such above until a successor replaces it
pursuant to the applicable provision hereof and thereafter means the successor.
The foregoing sentence shall likewise apply to any such successor or subsequent
successor.

     "COMPANY ORDER" or "COMPANY REQUEST" means a written request or order
signed on behalf of the Company by its Chairman of the Board, its Chief
Executive Officer, its President, its Chief Operating Officer, its Chief
Financial Officer, any Executive Vice President or any Senior Vice President and
by its Secretary or an Assistant Secretary, and delivered to the Trustee.

     "CONVERSION PRICE" means, as of any date of determination, the dollar
amount derived by dividing one thousand dollars ($1,000) by the Conversion Rate
in effect on such date.

     "CONVERSION RATE" shall initially be 50.7181 Common Shares per $1,000
principal amount of Securities, subject to adjustment as provided in ARTICLE X.

     "CORPORATE TRUST OFFICE OF THE TRUSTEE" shall be at the address of the
Trustee specified in SECTION 11.02 or such other address as the Trustee may give
notice of to the Company.

     "DEFAULT" means any event which is, or after notice or passage of time or
both would be, an Event of Default.

     "DEPOSITARY" means The Depository Trust Company, its nominees and
successors.


                                      -2-



     "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended, and
the rules and regulations of the SEC thereunder.

     "FUNDAMENTAL CHANGE" means a Change in Control or a Termination of Trading.

     "GLOBAL SECURITY" means a Security substantially in the form set forth in
EXHIBIT A, deposited with the Trustee, as custodian for the Depository, duly
executed by the Company and authenticated by the Trustee as herein provided, and
which bears the legends required hereby.

     "HOLDER" or "SECURITYHOLDER" means a person in whose name a Security is
registered on the Registrar's books.

     "INDEBTEDNESS" of a person means the principal of, premium, if any, and
interest on, and all other obligations in respect of (a) all indebtedness of
such person for borrowed money (including all indebtedness evidenced by notes,
bonds, debentures or other securities), (b) all obligations (other than trade
payables) incurred by such person in the acquisition (whether by way of
purchase, merger, consolidation or otherwise and whether by such person or
another person) of any business, real property or other assets, (c) all
reimbursement obligations of such person with respect to letters of credit,
bankers' acceptances or similar facilities issued for the account of such
person, (d) all capital lease obligations of such person, (e) all net
obligations of such person under interest rate swap, currency exchange or
similar agreements of such person, (f) all obligations and other liabilities,
contingent or otherwise, under any lease or related document, including a
purchase agreement, conditional sale or other title retention agreement, in
connection with the lease of real property or improvements thereon (or any
personal property included as part of any such lease) which provides that such
person is contractually obligated to purchase or cause a third party to purchase
the leased property or pay an agreed-upon residual value of the leased property,
including such person's obligations under such lease or related document to
purchase or cause a third party to purchase such leased property or pay an
agreed-upon residual value of the leased property to the lessor, (g) guarantees
by such person of indebtedness described in CLAUSES (A) THROUGH (F) of another
person, and (h) all renewals, extensions, refundings, deferrals, restructurings,
amendments and modifications of any indebtedness, obligation, guarantee or
liability of the kind described in CLAUSES (A) THROUGH (G).

     "INDENTURE" means this Indenture as amended or supplemented from time to
time.

     "INITIAL PURCHASER" means UBS Securities LLC.

     "ISSUE DATE" means November 9, 2006.

     "MAKE-WHOLE FUNDAMENTAL CHANGE" means an Asset Sale Make-Whole Fundamental
Change or a Common Shares Change Make-Whole Fundamental Change that occurs
before November 15, 2011.

     "MARKET DISRUPTION EVENT" means either (i) a failure by the primary United
States national securities exchange or market on which the Common Shares are
listed or admitted to trading to open for trading during its regular trading
session; or (ii) the occurrence or existence prior to 1:00 p.m. on any Trading
Day for the Common Shares for an aggregate of at least thirty (30) minutes of
any suspension or limitation imposed on trading (by reason of movements in


                                      -3-



price exceeding limits permitted by the stock exchange or otherwise) in the
Common Shares or in any options, contracts or future contracts relating to the
Common Shares.

     "MATURITY DATE" means November 15, 2026.

     "NOTICE OF ELECTION UPON TAX REDEMPTION" means a Notice of Election Upon
Tax Redemption in the form set forth in the Securities.

     "OFFICER" means the Chairman of the Board, the Chief Executive Officer, the
President, the Chief Operating Officer, the Chief Financial Officer, any
Executive Vice President, any Senior Vice President or the Secretary of the
Company.

     "OFFICERS' CERTIFICATE" means a certificate signed by two (2) Officers or
by an Officer and the Secretary of the Company.

     "OPINION OF COUNSEL" means a written opinion from legal counsel who may be
an employee of or counsel for the Company, or other counsel reasonably
acceptable to the Trustee.

     "OPTION" means the Initial Purchaser's option to acquire up to $2,085,000
aggregate principal amount of additional Securities ("ADDITIONAL SECURITIES") as
provided for in the Purchase Agreement.

     "PERSON" or "PERSON" means any individual, corporation, partnership,
limited liability company, joint venture, association, joint-stock company,
trust, unincorporated organization or government or other agency or political
subdivision thereof.

     "PURCHASE AGREEMENT" means the Purchase Agreement dated November 3, 2006
between the Company and the Initial Purchaser.

     "PURCHASE NOTICE" means a Purchase Notice in the form set forth in the
Securities.

     "QIB" means a "qualified institutional buyer" within the meaning of Rule
144A under the Securities Act.

     "REDEMPTION PRICE" means, with respect to a Security to be redeemed by the
Company in accordance with ARTICLE III, one hundred percent (100%) of the
outstanding principal amount of such Security to be redeemed.

     "REGISTRATION RIGHTS AGREEMENT" means the Registration Rights Agreement
dated as of the date hereof between the Company and the Initial Purchaser.

     "REGULATION D" means Regulation D under the Securities Act.

     "REGULATION S" means Regulation S under the Securities Act.

     "REGULATION S GLOBAL SECURITY" means a Global Security in registered form
representing a Security sold in reliance on Regulation S under the Securities
Act.


                                      -4-



     "RESPONSIBLE OFFICER" shall mean, when used with respect to the Trustee,
any officer within the corporate trust department of the Trustee with direct
responsibility for the administration of this Indenture or any other officer to
whom any corporate trust matter is referred because of such person's knowledge
of and familiarity with the particular subject.

     "RESTRICTED SECURITY" means a Security that constitutes a "restricted
security" within the meaning of Rule 144(a)(3) under the Securities Act;
provided, however, that the Trustee shall be entitled to request and
conclusively rely on an Opinion of Counsel with respect to whether any Security
constitutes a Restricted Security.

     "RULE 144" means Rule 144 under the Securities Act.

     "RULE 144A" means Rule 144A under the Securities Act.

     "RULE 144A GLOBAL SECURITY" means a Global Security in registered form
representing a Security sold in reliance on Rule 144A.

     "SEC" means the Securities and Exchange Commission.

     "SECURITIES" means the 6% Convertible Senior Notes due 2026 issued by the
Company pursuant to this Indenture (and each, a "SECURITY").

     "SECURITIES ACT" means the Securities Act of 1933, as amended, and the
rules and regulations of the SEC thereunder.

     "SECURITIES AGENT" means any Registrar, Paying Agent, Conversion Agent, Bid
Solicitation Agent or co-Registrar or co-agent.

     "SIGNIFICANT SUBSIDIARY" with respect to any person means any subsidiary of
such person that constitutes a "significant subsidiary" within the meaning of
Rule 1-02(w) of Regulation S-X under the Securities Act, as such regulation is
in effect on the date of this Indenture.

     "SUBSIDIARY" means (i) a corporation a majority of whose Capital Stock with
voting power, under ordinary circumstances, to elect directors is at the time,
directly or indirectly, owned by the Company, by one or more subsidiaries of the
Company or by the Company and one or more of its subsidiaries or (ii) any other
person (other than a corporation) in which the Company, one or more of its
subsidiaries, or the Company and one or more of its subsidiaries, directly or
indirectly, at the date of determination thereof, own at least a majority
ownership interest.

     A "TERMINATION OF TRADING" shall be deemed to occur if the Common Shares of
the Company (or other common stock into which the Securities are then
convertible (disregarding any cash payments for the Principal Return due upon
conversion, cash payments permitted to be paid hereunder in lieu of other
property otherwise due upon conversion, and cash due upon conversion in lieu of
fractional shares)) is not listed for trading on a U.S. national securities
exchange.


                                      -5-



     "TIA" means the Trust Indenture Act of 1939 (15 U.S. Code Sections
77aaa-77bbbb) as amended and in effect from time to time.

     "TRADING DAY" means any day during which all of the following conditions
are satisfied: (i) trading in the Common Shares generally occurs; and (ii) there
is no Market Disruption Event.

     "TRADING PRICE" means, on any date, the average of the secondary market bid
quotations for the Securities obtained by the Bid Solicitation Agent on behalf
of the Trustee (and confirmed in good faith in writing by the Company) for five
million dollars ($5,000,000) principal amount of Securities at approximately
4:00 p.m., New York City time, on such date, from three (3) independent,
nationally recognized securities dealers selected by the Company; provided, that
if the Bid Solicitation Agent on behalf of the Trustee can reasonably obtain
only two (2) such bids, then the average of such two (2) bids shall instead be
used; provided further, that if the Bid Solicitation Agent on behalf of the
Trustee can reasonably obtain only one (1) such bid, then such bid shall instead
be used; provided further, that if, on a given date, the Bid Solicitation Agent
on behalf of the Trustee cannot reasonably obtain at least one (1) such bid, or
if, in the reasonable, good faith judgment of the Board of Directors, which
judgment shall be described in a Board Resolution, the bid quotation or
quotations so obtained by the Bid Solicitation Agent on behalf of the Trustee
are not indicative of the secondary market value of the Securities, then, in
each case, the Trading Price per $1,000 principal amount of Securities on such
date shall be deemed to be equal to the product of (I) the Conversion Rate in
effect on such date and (II) 97% of the Closing Sale Price on such date.

     "TRUSTEE" means the party named as such in this Indenture until a successor
replaces it in accordance with the provisions hereof and thereafter means the
successor.

     "U.S. PERSON" means "U.S. person" as defined in Regulation S.

     "VOTING STOCK" of any Person means the total voting power of all classes of
the Capital Stock of such Person entitled to vote generally in the election of
directors of such Person.

1.02 OTHER DEFINITIONS.



                                                              Defined in
Term                                                            Section
- ----                                                          ----------
                                                           
"ACQUISITION OF VOTING CONTROL"............................       3.09
"ADDITIONAL SECURITIES"....................................       1.01
"AGGREGATE AMOUNT".........................................      10.05
"APPLICABLE PRICE".........................................      10.14
"AUTOMATIC CONVERSION".....................................      10.16
"AUTOMATIC CONVERSION DATE"................................      10.16
"AUTOMATIC CONVERSION NOTICE"..............................      10.16
"BANKRUPTCY LAW"...........................................       6.01
"BUSINESS DAY".............................................      11.07
"CANADIAN INCOME TAX ACT"..................................      10.11
"CANADIAN PRIVATE PLACEMENT LEGEND"........................       2.17
"CASH AMOUNT"..............................................      10.02
"CASH ELECTION NOTICE".....................................      10.02



                                      -6-




                                                           
"CASH SETTLEMENT AVERAGING PERIOD".........................      10.02
"CASH SETTLEMENT NOTICE DEADLINE DATE".....................      10.02
"CHANGE IN CANADIAN TAX LAW"...............................       3.10
"CHANGE IN CONTROL"........................................       3.09
"CHANGE IN CONTROL NOTICE".................................       3.09
"CHANGE IN CONTROL OFFER"..................................       3.09
"CHANGE IN CONTROL REPURCHASE DATE"........................       3.09
"CHANGE IN CONTROL REPURCHASE PRICE".......................       3.09
"CHANGE IN CONTROL REPURCHASE RIGHT".......................       3.09
"COLLECTIVE ELECTION"......................................      10.11
"COMMON SHARE CHANGE TRANSACTION"..........................      10.11
"CONVERSION AGENT".........................................       2.03
"CONVERSION CONSIDERATION ELECTION"........................      10.11
"CONVERSION DATE"..........................................      10.02
"CONVERSION RETRACTION DEADLINE DATE"......................      10.02
"CONVERSION VALUE".........................................      10.01
"CUSTODIAN"................................................       6.01
"DAILY CONVERSION VALUE"...................................      10.02
"DAILY NET SHARES".........................................      10.02
"DAILY PRINCIPAL RETURN"...................................      10.02
"DETERMINATION DATE".......................................      10.05
"DISTRIBUTION DATE"........................................      10.05
"EFFECTIVE DATE"...........................................      10.14
"EVENT OF DEFAULT".........................................       6.01
"EXCLUDED HOLDER"..........................................       4.08
"EX DATE"..................................................      10.05
"EXPIRATION DATE"..........................................      10.05
"EXPIRATION TIME"..........................................      10.05
"EXTENSION PERIOD".........................................      10.01
"FINAL NOTICE DATE"........................................      10.02
"INELIGIBLE CONSIDERATION".................................      10.11
"INITIAL SECTION 10.15 CONVERSION RATE"....................      10.15
"IRREVOCABLE NET SHARE SETTLEMENT ELECTION"................      10.02
"LEGAL HOLIDAY"............................................      11.07
"LISTED STOCK BUSINESS COMBINATION"........................       3.09
"MAKE-WHOLE APPLICABLE INCREASE"...........................      10.14
"MAKE-WHOLE CONVERSION PERIOD".............................      10.14
"MAKE-WHOLE CONSIDERATION".................................      10.14
"MANDATORY CONVERSION ELECTION"............................      10.16
"NET SHARE SETTLEMENT ELECTION DATE".......................      10.02
"NET SHARES"...............................................      10.02
"NOTICE OF DEFAULT"........................................       6.01
"NOTE MEASUREMENT PERIOD"..................................      10.01
"OPTION PURCHASE DATE".....................................       3.08
"OPTION PURCHASE NOTICE"...................................       3.08
"OPTION PURCHASE PRICE"....................................       3.08



                                      -7-




                                                           
"PARTICIPANTS".............................................       2.15
"PAYING AGENT".............................................       2.03
"PHYSICAL SECURITIES"......................................       2.01
"PRESCRIBED SECURITIES"....................................      10.11
"PRINCIPAL RETURN".........................................      10.02
"PRIVATE PLACEMENT LEGEND".................................       2.17
"PURCHASE AT HOLDER'S OPTION"..............................       3.01
"PURCHASED SHARES".........................................      10.05
"REDEMPTION"...............................................       3.01
"REDEMPTION DATE"..........................................       3.01
"REFERENCE PROPERTY".......................................      10.11
"REGISTRAR"................................................       2.03
"REPURCHASE UPON CHANGE IN CONTROL"........................       3.01
"RESALE RESTRICTION TERMINATION DATE"......................       2.17
"RIGHTS"...................................................      10.05
"SECTION 10.15 CONVERSION RATE ADJUSTMENT".................      10.15
"TAX REDEMPTION"...........................................       3.01
"TERMINATION OF TRADING"...................................       3.09
"TRADING PRICE CONDITION"..................................      10.01
"UNDERLYING SHARES"........................................      10.05
"VOLUME-WEIGHTED AVERAGE PRICE"............................      10.01


1.03 INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT.

     Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture.

     The following TIA terms used in this Indenture have the following meanings:

     "COMMISSION" means the SEC;
     "INDENTURE SECURITIES" means the Securities;
     "INDENTURE SECURITY HOLDER" means a Securityholder or a Holder;
     "INDENTURE TO BE QUALIFIED" means this Indenture;
     "INDENTURE TRUSTEE" or "INSTITUTIONAL TRUSTEE" means the Trustee; and
     "OBLIGOR" on the indenture securities means the Company or any successor.

     All other terms used in this Indenture that are defined by the TIA, defined
by the TIA by reference to another statute or defined by SEC rule under the TIA
and not otherwise defined herein have the meanings so assigned to them.

1.04 RULES OF CONSTRUCTION.

     Unless the context otherwise requires:

          (i)  a term has the meaning assigned to it;


                                      -8-



          (ii) an accounting term not otherwise defined has the meaning assigned
               to it in accordance with generally accepted accounting principles
               in effect from time to time;

          (iii) "or" is not exclusive;

          (iv) "including" means "including without limitation";

          (v)  words in the singular include the plural and in the plural
               include the singular;

          (vi) provisions apply to successive events and transactions;

          (vii) the term "INTEREST" includes additional interest, unless the
               context otherwise requires or, in the case of additional
               interest, unless the terms of the Registration Rights Agreement
               provide otherwise;

          (viii) "herein," "hereof" and other words of similar import refer to
               this Indenture as a whole and not to any particular Article,
               Section or other subdivision of this Indenture; and

          (ix) references to currency shall mean the lawful currency of the
               United States of America, unless the context requires otherwise.

                               II. THE SECURITIES

2.01 FORM AND DATING.

     The Securities and the Trustee's certificate of authentication shall be
substantially in the form set forth in EXHIBIT A, which is incorporated in and
forms a part of this Indenture. The Securities may have notations, legends or
endorsements required by law, stock exchange rule or usage. Each Security shall
be dated the date of its authentication.

     Securities initially offered and sold in reliance on Rule 144A shall be
issued initially in the form of one or more Rule 144A Global Securities, bearing
the legends set forth in EXHIBITS B-1, B-2 and B-3. Securities initially offered
and sold in reliance on Regulation S shall be issued initially in the form of
one or more Regulation S Global Securities, bearing the legends set forth in
EXHIBITS B-2 and B-3. Each Security initially offered and sold to an Accredited
Investor shall be issued initially in the form of one or more Accredited
Investor Certificated Securities registered in the name of such Accredited
Investor and bearing the legends set forth in EXHIBITS B-1 and B-3. The
aggregate principal amount of the Global Securities and the Accredited Investor
Certificated Securities, if any, may from time to time be increased or decreased
by adjustments made on the records of the Trustee, as custodian for the
Depositary, as hereinafter provided; provided, that in no event shall the
aggregate principal amount of all Global Securities, together with the aggregate
principal amount of all Accredited Investor Certificated Securities, if any,
exceed $40,000,000 (or $42,085,000 if the Initial Purchaser elects to purchase
all of the Additional Securities pursuant to the Option).


                                      -9-



     Securities issued in exchange for interests in a Global Security pursuant
to SECTION 2.15(B) may be issued in the form of permanent certificated
Securities in registered form in substantially the form set forth in EXHIBIT A
(the "PHYSICAL SECURITIES") and, if applicable, bearing any legends required by
SECTION 2.17.

2.02 EXECUTION AND AUTHENTICATION.

     One duly authorized Officer shall sign the Securities for the Company by
manual or facsimile signature.

     A Security's validity shall not be affected by the failure of an Officer
whose signature is on such Security to hold, at the time the Security is
authenticated, the same office at the Company.

     A Security shall not be valid until authenticated by the manual signature
of the Trustee. The signature shall be conclusive evidence that the Security has
been authenticated under this Indenture.

     Upon a written order of the Company signed by one (1) Officer of the
Company, the Trustee shall authenticate Securities for original issue in the
aggregate principal amount of $40,000,000 and such additional principal amount,
if any, as shall be determined pursuant to the next sentence of this SECTION
2.02. Upon receipt by the Trustee of an Officers' Certificate stating that the
Initial Purchaser has elected to purchase from the Company a specified principal
amount of Additional Securities, not to exceed $2,085,000, pursuant to the
Option, the Trustee shall authenticate and deliver such specified principal
amount of Additional Securities to or upon the written order of the Company
signed as provided in the immediately preceding sentence. Such Officers'
Certificate must be received by the Trustee not later than the proposed date for
delivering of such Additional Securities. The aggregate principal amount of
Securities outstanding at any time may not exceed $40,000,000 except as provided
in this SECTION 2.02.

     Upon a written order of the Company signed by two (2) Officers or by an
Officer and a Secretary of the Company, the Trustee shall authenticate
Securities not bearing the Private Placement Legend to be issued to the
transferee when sold pursuant to an effective registration statement under the
Securities Act as set forth in SECTION 2.16(E).

     The Trustee shall act as the initial authenticating agent. Thereafter, the
Trustee may appoint an authenticating agent acceptable to the Company to
authenticate Securities. An authenticating agent may authenticate Securities
whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such authenticating
agent. An authenticating agent has the same rights as a Securities Agent to deal
with the Company and its Affiliates.

     If a written order of the Company pursuant to this SECTION 2.02 has been,
or simultaneously is, delivered, any instructions by the Company to the Trustee
with respect to endorsement, delivery or redelivery of a Security issued in
global form shall be in writing but need not comply with SECTION 11.04 hereof
and need not be accompanied by an Opinion of Counsel.


                                      -10-



     The Securities shall be issuable only in registered form without interest
coupons and only in denominations of $1,000 principal amount and any integral
multiple thereof.

2.03 REGISTRAR, PAYING AGENT AND CONVERSION AGENT.

     The Company shall maintain, or cause to be maintained on its behalf, an
office or agency in the Borough of Manhattan, The City of New York, where
Securities may be presented for registration of transfer or for exchange
("REGISTRAR"), an office or agency in the Borough of Manhattan, The City of New
York, where Securities may be presented for payment ("PAYING AGENT") and an
office or agency in the Borough of Manhattan, The City of New York, where
Securities may be presented for conversion ("CONVERSION AGENT"). The Registrar
shall keep a register of the Securities and of their transfer and exchange. The
Company may appoint or change one or more co-Registrars, one or more additional
paying agents and one or more additional conversion agents without notice and
may act in any such capacity on its own behalf. The term "REGISTRAR" includes
any co-Registrar; the term "PAYING AGENT" includes any additional paying agent;
and the term "CONVERSION AGENT" includes any additional conversion agent.

     The Company shall enter into an appropriate agency agreement with any
Securities Agent not a party to this Indenture. The agreement shall implement
the provisions of this Indenture that relate to such Securities Agent. The
Company shall notify the Trustee of the name and address of any Securities Agent
not a party to this Indenture. If the Company fails to maintain a Registrar,
Paying Agent or Conversion Agent, the Trustee shall act as such.

     The Company initially appoints the Trustee as Paying Agent, Bid
Solicitation Agent, Registrar and Conversion Agent.

2.04 PAYING AGENT TO HOLD MONEY IN TRUST.

     Each Paying Agent shall hold in trust for the benefit of the
Securityholders or the Trustee all moneys held by the Paying Agent for the
payment of the Securities, and shall notify the Trustee of any Default by the
Company in making any such payment. While any such Default continues, the
Trustee may require a Paying Agent to pay all money held by it to the Trustee.
The Company at any time may require a Paying Agent to pay all money held by it
to the Trustee. Upon payment over to the Trustee, the Paying Agent shall have no
further liability for such money. If the Company acts as Paying Agent, it shall
segregate and hold as a separate trust fund all money held by it as Paying
Agent.

2.05 SECURITYHOLDER LISTS.

     The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Securityholders. If the Trustee is not the Registrar, the Company shall furnish
to the Trustee on or before each interest payment date and at such other times
as the Trustee may request in writing a list, in such form and as of such date
as the Trustee may reasonably require, of the names and addresses of
Securityholders.


                                      -11-



2.06 TRANSFER AND EXCHANGE.

Subject to SECTIONS (O) and (P) hereof, where Securities are presented to
the Registrar with a request to register their transfer or to exchange them for
an equal principal amount of Securities of other authorized denominations, the
Registrar shall register the transfer or make the exchange if its requirements
for such transaction are met. To permit registrations of transfer and exchanges,
the Trustee shall authenticate Securities at the Registrar's request. The
Company or the Trustee, as the case may be, shall not be required to register
the transfer of or exchange any Security (i) for a period of fifteen (15) days
before selecting, pursuant to SECTION 13(C), Securities to be redeemed or (ii)
during a period beginning at the opening of business fifteen (15) days before
the mailing of a notice of redemption of the Securities selected for Redemption
under SECTION 13(D) or 13(J) and ending at the close of business on the day of
such mailing or (iii) that has been selected for Redemption or for which a
Purchase Notice has been delivered, and not withdrawn, in accordance with this
Indenture, except the unredeemed or unrepurchased portion of Securities being
redeemed or repurchased in part.

No service charge shall be made for any transfer, exchange or conversion of
Securities, but the Company or the Trustee may require payment of a sum
sufficient to cover any transfer tax or similar governmental charge that may be
imposed in connection with any transfer, exchange or conversion of Securities,
other than exchanges pursuant to SECTIONS (J), (E) or (B), or ARTICLE 13,
not involving any transfer.

2.07 REPLACEMENT SECURITIES.

If the Holder of a Security claims that the Security has been mutilated,
lost, destroyed or wrongfully taken, the Company shall issue and the Trustee
shall authenticate a replacement Security upon surrender to the Trustee of the
mutilated Security, or upon delivery to the Trustee of evidence of the loss,
destruction or theft of the Security satisfactory to the Trustee and the
Company. In the case of a lost, destroyed or wrongfully taken Security, if
required by the Trustee or the Company, an indemnity bond must be provided by
the Holder that is reasonably satisfactory to the Trustee and the Company to
protect the Company, the Trustee or any Securities Agent from any loss which any
of them may suffer if such Security is replaced. The Trustee may charge for its
expenses in replacing a Security.

In case any such mutilated, lost, destroyed or wrongfully taken Security
has become or is about to become due and payable, the Company in its discretion
may, instead of issuing a new Security, pay such Security when due.

Every replacement Security is an additional obligation of the Company only
as provided in SECTION (H).

2.08 OUTSTANDING SECURITIES.

     Securities outstanding at any time are all the Securities authenticated by
the Trustee except for those converted, those cancelled by it, those delivered
to it for cancellation and those described in this SECTION (H) as not
outstanding. Except to the extent provided in SECTION (I), a Security does not
cease to be outstanding because the Company or one of its Subsidiaries or
Affiliates holds the Security.


                                      -12-



     If a Security is replaced pursuant to SECTION 2.07, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it, or a court
holds, that the replaced Security is held by a protected purchaser.

     If the Paying Agent (other than the Company) holds on an Option Purchase
Date, Redemption Date, Tax Redemption Date, Change in Control Repurchase Date or
Maturity Date, money sufficient to pay the aggregate Option Purchase Price,
Redemption Price, Tax Redemption Price, Change in Control Repurchase Price or
principal amount, as the case may be, with respect to all Securities to be
redeemed, purchased or paid upon Purchase at Holder's Option, Redemption, Tax
Redemption, Repurchase Upon Change in Control or maturity, as the case may be,
in each case plus, if applicable, accrued and unpaid interest, if any, payable
as herein provided upon Purchase at Holder's Option, Redemption, Tax Redemption,
Repurchase Upon Change in Control or maturity, then (unless there shall be a
Default in the payment of such aggregate Option Purchase Price, Redemption
Price, Tax Redemption Price, Change in Control Repurchase Price or principal
amount, or of such accrued and unpaid interest), except as otherwise provided
herein, on and after such date such Securities shall be deemed to be no longer
outstanding, interest on such Securities shall cease to accrue, and such
Securities shall be deemed paid whether or not such Securities are delivered to
the Paying Agent. Thereafter, all rights of the Holders of such Securities shall
terminate with respect to such Securities, other than the right to receive the
Option Purchase Price, Redemption Price, Tax Redemption Price, Change in Control
Repurchase Price or principal amount, as the case may be, plus, if applicable,
such accrued and unpaid interest, in accordance with this Indenture.

     If a Security is converted in accordance with ARTICLE X, then, from and
after the time of such conversion on the Conversion Date, such Security shall
cease to be outstanding, and interest, if any, shall cease to accrue on such
Security unless there shall be a Default in the payment or delivery of the
consideration payable hereunder upon such conversion.

2.09 SECURITIES HELD BY THE COMPANY OR AN AFFILIATE.

     In determining whether the Holders of the required aggregate principal
amount of Securities have concurred in any direction, waiver or consent,
Securities owned by the Company or any of its Subsidiaries or Affiliates shall
be considered as though not outstanding, except that, for the purposes of
determining whether the Trustee shall be protected in relying on any such
direction, waiver or consent, only Securities which a Responsible Officer of the
Trustee knows are so owned shall be so disregarded. Securities so owned which
have been pledged in good faith may be considered to be outstanding for purposes
of this SECTION 2.09 if the pledgee establishes, to the satisfaction of the
Trustee, the pledgee's right so to concur with respect to such Securities and
that the pledgee is not, and is not acting at the direction or on behalf of, the
Company, any other obligor on the Securities, an Affiliate of the Company or an
affiliate of any such other obligor. In the event of a dispute as to whether the
pledgee has established the foregoing, the Trustee may rely on the advice of
counsel or on an Officers' Certificate.

2.10 TEMPORARY SECURITIES.

     Until definitive Securities are ready for delivery, the Company may prepare
and the Trustee shall authenticate temporary Securities. Temporary Securities
shall be substantially in


                                      -13-



the form of definitive Securities but may have variations that the Company
considers appropriate for temporary Securities. Without unreasonable delay, the
Company shall prepare and the Trustee shall authenticate definitive Securities
in exchange for temporary Securities. Until so exchanged, each temporary
Security shall in all respects be entitled to the same benefits under this
Indenture as definitive Securities, and such temporary Security shall be
exchangeable for definitive Securities in accordance with the terms of this
Indenture.

2.11 CANCELLATION.

     The Company at any time may deliver Securities to the Trustee for
cancellation. The Registrar, Paying Agent and Conversion Agent shall forward to
the Trustee any Securities surrendered to them for transfer, exchange, payment
or conversion. The Trustee shall promptly cancel all Securities surrendered for
transfer, exchange, payment, conversion or cancellation in accordance with its
customary procedures. The Company may not issue new Securities to replace
Securities that it has paid or delivered to the Trustee for cancellation or that
any Securityholder has converted pursuant to ARTICLE X.

2.12 DEFAULTED INTEREST.

     If and to the extent the Company defaults in a payment of interest on the
Securities, the Company shall pay in cash the defaulted interest in any lawful
manner plus, to the extent not prohibited by applicable statute or case law,
interest on such defaulted interest at the rate provided in the Securities. The
Company may pay the defaulted interest (plus interest on such defaulted
interest) to the persons who are Securityholders on a subsequent special record
date. The Company shall fix such record date and payment date. At least fifteen
(15) calendar days before the record date, the Company shall mail to
Securityholders a notice that states the record date, payment date and amount of
interest to be paid.

2.13 CUSIP NUMBERS.

     The Company in issuing the Securities may use one or more "CUSIP" numbers,
and, if so, the Trustee shall use the CUSIP numbers in notices of redemption or
exchange as a convenience to Holders; provided, however, that no representation
is hereby deemed to be made by the Trustee as to the correctness or accuracy of
the CUSIP numbers printed on the notice or on the Securities; provided further,
that reliance may be placed only on the other identification numbers printed on
the Securities, and the effectiveness of any such notice shall not be affected
by any defect in, or omission of, such CUSIP numbers. The Company shall promptly
notify the Trustee in writing of any change in the CUSIP numbers.

2.14 DEPOSIT OF MONEYS.

     Prior to 10:00 A.M., New York City time, on each interest payment date,
Maturity Date, Redemption Date, Tax Redemption Date, Option Purchase Date or
Change in Control Repurchase Date, the Company shall have deposited with a
Paying Agent (or, if the Company is acting as its own Paying Agent, segregate
and hold in trust in accordance with SECTION 2.04) money, in funds immediately
available on such date, sufficient to make cash payments, if any, due on such
interest payment date, Maturity Date, Redemption Date, Tax Redemption Date,
Option Purchase Date or Change in Control Repurchase Date, as the case may be,
in a timely


                                      -14-



manner which permits the Paying Agent to remit payment to the Holders on such
interest payment date, Maturity Date, Redemption Date, Tax Redemption Date,
Option Purchase Date or Change in Control Repurchase Date, as the case may be.

2.15 BOOK-ENTRY PROVISIONS FOR GLOBAL SECURITIES.

     (A) The Global Securities initially shall (i) be registered in the name of
the Depositary or the nominee of the Depositary, (ii) be delivered to the
Trustee as custodian for the Depositary and (iii) bear legends as set forth in
SECTION 2.17.

     Members of, or participants in, the Depositary ("PARTICIPANTS") shall have
no rights under this Indenture with respect to any Global Security held on their
behalf by the Depositary, or the Trustee as its custodian, or under the Global
Security, and the Depositary may be treated by the Company, the Trustee and any
agent of the Company or the Trustee as the absolute owner of the Global Security
for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall
prevent the Company, the Trustee or any agent of the Company or the Trustee from
giving effect to any written certification, proxy or other authorization
furnished by the Depositary or impair, as between the Depositary and
Participants, the operation of customary practices governing the exercise of the
rights of a Holder of any Security.

     (B) Transfers of Global Securities shall be limited to transfers in whole,
but not in part, to the Depositary, its successors or their respective nominees.
In addition, Physical Securities shall be transferred to all beneficial owners,
as identified by the Depositary, in exchange for their beneficial interests in
Global Securities only if (i) the Depositary notifies the Company that the
Depositary is unwilling or unable to continue as depositary for any Global
Security (or the Depositary ceases to be a "clearing agency" registered under
Section 17A of the Exchange Act) and a successor Depositary is not appointed by
the Company within ninety (90) days of such notice or cessation or (ii) an Event
of Default has occurred and is continuing and the Registrar has received a
written request from the Depositary to issue Physical Securities.

     (C) In connection with the transfer of a Global Security in its entirety to
beneficial owners pursuant to SECTION 2.15(B), such Global Security shall be
deemed to be surrendered to the Trustee for cancellation, and the Company shall
execute, and the Trustee shall upon written instructions from the Company
authenticate and deliver, to each beneficial owner identified by the Depositary
in exchange for its beneficial interest in such Global Security, an equal
aggregate principal amount of Physical Securities of authorized denominations.

     (D) Any Physical Security constituting a Restricted Security delivered in
exchange for an interest in a Global Security pursuant to SECTION 2.15(B) shall,
except as otherwise provided by SECTION 2.16, bear the Private Placement Legend.

     (E) The Holder of any Global Security may grant proxies and otherwise
authorize any Person, including Participants and Persons that may hold interests
through Participants, to take any action which a Holder is entitled to take
under this Indenture or the Securities.


                                      -15-



2.16 SPECIAL TRANSFER PROVISIONS.

     (A) TRANSFERS TO NON-QIB INVESTORS IN THE UNITED STATES. The following
provisions shall apply with respect to the registration of any proposed transfer
of a Security that is a Restricted Security, or of any proposed transfer of a
Security by an Affiliate of the Company, in each case other than pursuant to an
effective registration statement under the Securities Act or pursuant to Rule
144, to a proposed transferee in the United States that is not a QIB:

          (i) The Registrar shall register such proposed transfer if (x) such
     proposed transfer is after the Resale Restriction Termination Date and the
     Registrar and the Company shall have received evidence to their reasonable
     satisfaction confirming the same or (y) there is delivered to the Registrar
     and the Company a certificate substantially in the form of EXHIBIT E (with
     such changes as may be reasonably requested by the Registrar or the
     Company) and any legal opinions and other certifications reasonably
     requested by the Registrar or the Company.

          (ii) The Company shall issue, and the Trustee shall authenticate, an
     Accredited Investor Certificated Security, registered in the name of such
     proposed transferee.

          (iii) If the Security to be transferred is a Global Security, then the
     Registrar shall reduce the principal amount of such Global Security by the
     principal amount to be transferred or, if the principal amount of such
     Global Security is equal to the principal amount to be transferred, the
     Registrar shall cancel such Global Security. If the Security to be
     transferred is an Accredited Investor Certificated Security, then the
     Registrar shall cancel such Accredited Investor Certificated Security and,
     if the principal amount to be transferred is less than the principal amount
     of such Accredited Investor Certificated Security, the Company shall issue,
     and the Trustee shall authenticate, a new Accredited Investor Certificate
     in the name of the transferor having a principal amount equal to the
     remaining principal amount after effecting such proposed transfer.

     (B) TRANSFERS TO QIBS IN THE UNITED STATES. The following provisions shall
apply with respect to the registration of any proposed transfer in the United
States, pursuant to Rule 144A, of a Security that is a Restricted Security to a
proposed transferee that is a QIB:

          (i) The Registrar shall register such proposed transfer if the
     certification contained in the Form of Assignment on such Security with
     respect to a transfer to a QIB is duly completed and delivered to the
     Registrar.

          (ii) If such Security is not a Rule 144A Global Security, then the
     Company shall issue, and the Trustee shall authenticate, a Rule 144A Global
     Security having a principal amount equal to the principal amount to be
     transferred or, alternatively, the Registrar shall increase the principal
     amount of an existing Rule 144A Global Security by the principal amount to
     be transferred.


                                      -16-



          (iii) If the Security to be transferred is an Accredited Investor
     Certificated Security, then the Registrar shall cancel such Accredited
     Investor Certificated Security and, if the principal amount to be
     transferred is less than the principal amount of such Accredited Investor
     Certificated Security, the Company shall issue, and the Trustee shall
     authenticate, a new Accredited Investor Certificated Security in the name
     of the transferor having a principal amount equal to the remaining
     principal amount after effecting such proposed transfer.

     (C) TRANSFERS PURSUANT TO REGULATION S. The following provisions shall
apply with respect to the registration of any proposed transfer of a Security
that is a Restricted Security pursuant to Regulation S:

          (i) The Registrar shall register such proposed transfer if there is
     delivered to the Registrar and the Company a certificate substantially in
     the form of EXHIBIT F-1 (with such changes as may be reasonably requested
     by the Registrar or the Company) and, if reasonably requested by the
     Registrar or the Company in connection with a transfer that is not to be
     executed in, on or through the facilities of a "designated offshore
     securities market" (as defined in Regulation S), a certificate
     substantially in the form of EXHIBIT F-2 (with such changes as may be
     reasonably requested by the Registrar or the Company) and any legal
     opinions and other certifications reasonably requested by the Registrar or
     the Company.

          (ii) If such Security is not a Regulation S Global Security, then the
     Company shall issue, and the Trustee shall authenticate, a Regulation S
     Global Security having a principal amount equal to the principal amount to
     be transferred or, alternatively, the Registrar shall increase the
     principal amount of an existing Regulation S Global Security by the
     principal amount to be transferred.

          (iii) If the Security to be transferred is a Rule 144A Global
     Security, then the Registrar shall reduce the principal amount of such Rule
     144A Global Security by the principal amount to be transferred or, if the
     principal amount of such Rule 144A Global Security is equal to the
     principal amount to be transferred, the Registrar shall cancel such Rule
     144A Global Security. If the Security to be transferred is an Accredited
     Investor Certificated Security, then the Registrar shall cancel such
     Accredited Investor Certificated Security and, if the principal amount to
     be transferred is less than the principal amount of such Accredited
     Investor Certificated Security, the Company shall issue, and the Trustee
     shall authenticate, a new Accredited Investor Certificated Security in the
     name of the transferor having a principal amount equal to the remaining
     principal amount after effecting such proposed transfer.

     (D) RESTRICTIONS ON TRANSFER AND EXCHANGE OF GLOBAL SECURITIES.
Notwithstanding any other provisions of this Indenture, but except as provided
in SECTION 2.15(B), a Global Security may not be transferred except as a whole
by the Depositary to a nominee of the Depositary or by a nominee of the
Depositary to the Depositary or another nominee of the


                                      -17-



Depositary or by the Depositary or any such nominee to a successor Depositary or
a nominee of such successor Depositary.

     (E) PRIVATE PLACEMENT LEGEND AND CANADIAN PRIVATE PLACEMENT LEGEND. Upon
the transfer, exchange or replacement of Securities not bearing the Private
Placement Legend, the Registrar or co-Registrar shall deliver Securities that do
not bear the Private Placement Legend; provided, however, that if the transfer
is being made by an Affiliate of the Company (as indicated in the applicable
Form of Assignment) in the United States (other than pursuant to an effective
registration statement under the Securities Act or pursuant to Rule 144) or is
being made pursuant to Rule 144A, or, if the Company so requests on advice of
counsel, then the Registrar or co-Registrar shall deliver Securities that bear
the Private Placement Legend. Upon the transfer, exchange or replacement of
Securities bearing the Private Placement Legend, the Registrar or co-Registrar
shall deliver only Securities that bear the Private Placement Legend unless (i)
the requested transfer, exchange or replacement is after the Resale Restriction
Termination Date, (ii) there is delivered to the Trustee and the Company an
opinion of counsel reasonably satisfactory to the Company and addressed to the
Company and the Trustee to the effect that neither such legend nor the related
restrictions on transfer are required in order to maintain compliance with the
provisions of the Securities Act, (iii) there is delivered to the Trustee and
the Company a transferor certificate substantially in the form of EXHIBIT F-1
hereto (with such changes as may be reasonably requested by the Trustee or the
Company) and, if reasonably requested by the Trustee or the Company in
connection with a transfer that is not to be executed in, on or through the
facilities of a "designated offshore securities market" (as defined in
Regulation S), a transferee certificate substantially in the form of EXHIBIT F-2
hereto (with such changes as may be reasonably requested by the Trustee or the
Company) and any legal opinions and other certifications reasonably requested by
the Trustee or the Company, or (iv) such Security has been sold pursuant to an
effective registration statement under the Securities Act and the Holder selling
such Securities has delivered to the Registrar or co-Registrar a notice in the
form of EXHIBIT C hereto. Upon the transfer, exchange or replacement of
Securities not bearing the Canadian Private Placement Legend, the Registrar or
co-Registrar shall deliver Securities that do not bear the Canadian Private
Placement Legend. Upon the transfer, exchange or replacement of Securities
bearing the Canadian Private Placement Legend, the Registrar or co-Registrar
shall deliver only Securities that bear the Canadian Private Placement Legend
unless (i) either (A) the requested transfer, exchange or replacement is on or
after the date that is four (4) months and one (1) day from the date of the
issuance of such Securities or (B) a prospectus has been filed with the
appropriate Canadian securities commissions qualifying such Securities in Canada
or (C) such Securities have been sold pursuant to an effective registration
statement under the Securities Act, and (ii) there is delivered, in the case of
(i)(A) and (B), as the case may be, to the Company and the Trustee an opinion of
counsel reasonably satisfactory to the Company and addressed to the Company and
the Trustee to the effect that neither such legend nor the related restrictions
on transfer are required in order to maintain compliance with the provisions of
Canadian securities laws. Upon the effectiveness, under the Securities Act, of
the "Shelf Registration Statement" (as defined in the Registration Rights
Agreement), the Company shall deliver to the Trustee a notice of effectiveness
and an Opinion of Counsel in the form of EXHIBIT D hereto, and, if required by
the Depositary, the Company shall deliver to the Depositary a letter of
representations in a form reasonably acceptable to the Depositary. Upon the
effectiveness of any post-effective amendment to the "Shelf Registration
Statement" (as defined in the Registration Rights Agreement) and upon the


                                      -18-



effectiveness, under the Securities Act, of any "Subsequent Shelf Registration
Statement" (as defined in the Registration Rights Agreement), the Company shall
deliver to the Trustee a notice of effectiveness and an Opinion of Counsel in
the form of EXHIBIT D hereto. Upon any sale, pursuant to a Shelf Registration
Statement, of a beneficial interest in a Global Security that theretofore
constituted a Restricted Security and delivery of appropriate evidence thereof
to the Trustee, and upon any sale or transfer of a beneficial interest in
connection with which the Private Placement Legend will be removed in accordance
with this Indenture, the Trustee shall increase the principal amount of the
Global Security that does not constitute a Restricted Security by the principal
amount of such sale or transfer and likewise reduce the principal amount of the
Global Security that does constitute a Restricted Security.

     (F) GENERAL. By its acceptance of any Security bearing the Private
Placement Legend or the Canadian Private Placement Legend, each Holder of such a
Security acknowledges the restrictions on transfer of such Security set forth in
this Indenture and in such legend or legends and agrees that it will transfer
such Security only as provided in this Indenture and in accordance with such
legend or legends.

     The Registrar shall retain copies of all letters, notices and other written
communications received pursuant to SECTION 2.15 or this SECTION 2.16. The
Company shall have the right to inspect and make copies of all such letters,
notices or other written communications at any reasonable time upon the giving
of reasonable written notice to the Registrar.

     (G) TRANSFERS OF SECURITIES HELD BY AFFILIATES. Any certificate (i)
evidencing a Security that has been transferred to an Affiliate within two (2)
years after the Issue Date, as evidenced by a notation on the assignment form
for such transfer or in the representation letter delivered in respect thereof
or (ii) evidencing a Security that has been acquired from an Affiliate (other
than by an Affiliate) in a transaction or a chain of transactions not involving
any public offering, shall, until two (2) years after the last date on which the
Company or any Affiliate was an owner of such Security (or such longer period of
time as may be required under the Securities Act or applicable state securities
laws), in each case, bear the Private Placement Legend, unless otherwise agreed
by the Company (with written notice thereof to the Trustee).

2.17 RESTRICTIVE LEGENDS.

     Each Security that constitutes a Restricted Security shall bear the legend
(the "PRIVATE PLACEMENT LEGEND") as set forth in EXHIBIT B-1 on the face thereof
(1) until after the second anniversary of the later of (i) the Issue Date and
(ii) the last date on which the Company or any Affiliate was the owner of such
Security (or any predecessor security) (or such shorter period of time as
permitted by Rule 144(k) under the Securities Act or any successor provision
thereunder) (or such longer period of time as may be required under the
Securities Act or applicable state securities laws, as set forth in an Opinion
of Counsel, unless otherwise agreed between the Company and the Holder thereof)
(such date, the "RESALE RESTRICTION TERMINATION DATE"); or (2) as otherwise
provided in or permitted by SECTION 2.16(E). Until March 10, 2007, each Security
shall bear the legend set forth in EXHIBIT B-3 (the "CANADIAN PRIVATE PLACEMENT
LEGEND").

     Each Global Security shall also bear the legend as set forth in EXHIBIT
B-2.


                                      -19-



2.18 RANKING.

     The indebtedness of the Company arising under or in connection with this
Indenture and every outstanding Security issued under this Indenture from time
to time constitutes and will constitute a senior unsecured obligation of the
Company, ranking equally with other existing, if any, and future senior
unsecured indebtedness of the Company and ranking senior to any existing, if
any, or future subordinated indebtedness of the Company.

                         III. REDEMPTION AND REPURCHASE

3.01 RIGHT OF REDEMPTION.

     (A) Redemption of the Securities, as permitted by any provision of this
Indenture, shall be made:

          (i) with respect to a repurchase at the Company's option, in
     accordance with PARAGRAPHS 6 AND 7 or with PARAGRAPH 10 of the Securities
     (a "REDEMPTION") (a Redemption pursuant PARAGRAPH 10 of the Securities is
     herein referred to as a "TAX REDEMPTION"),

          (ii) with respect to a repurchase at the Holder's option, in
     accordance with PARAGRAPH 8 of the Securities (a "PURCHASE AT HOLDER'S
     OPTION") and

          (iii) with respect to any repurchase upon a Change in Control, in
     accordance with PARAGRAPH 9 of the Securities (a "REPURCHASE UPON CHANGE IN
     CONTROL"),

     in each case in accordance with the applicable provisions of this ARTICLE
III.

     (B) The Company will comply with all federal, state and provincial
securities laws, and the applicable laws of any foreign jurisdiction, in
connection with any offer to sell or solicitations of offers to buy Securities
pursuant to this ARTICLE III.

     (C) The Company shall not have the right to redeem any Securities prior to
November 15, 2011, except pursuant to a Tax Redemption. The Company shall have
the right, at the Company's option, at any time, and from time to time, on a
date (a "REDEMPTION DATE") on or after November 15, 2011, to redeem all or any
part of the Securities at a price payable in cash equal to the Redemption Price
plus accrued and unpaid interest, if any, to, but excluding, the Redemption
Date; provided, however, that in no event shall any Redemption Date be a Legal
Holiday; provided further, that if the Redemption Date with respect to a
Security is after a record date for the payment of an installment of interest
and on or before the related interest payment date, then accrued and unpaid
interest to, but excluding, such interest payment date shall be paid, on such
interest payment date, to the Holder of record of such Security at the close of
business on such record date, and the Holder surrendering such Security for
Redemption shall not be entitled to any such interest unless such Holder was
also the Holder of record of such Security at the close of business on such
record date.


                                      -20-



     (D) Securities in denominations larger than $1,000 principal amount may be
redeemed in part but only in integral multiples of $1,000 principal amount.

3.02 NOTICES TO TRUSTEE.

     If the Company elects to redeem Securities pursuant to PARAGRAPH 6 of the
Securities, it shall notify the Trustee of the Redemption Date, the applicable
provision of this Indenture pursuant to which the Redemption is to be made and
the aggregate principal amount of Securities to be redeemed, which notice shall
be provided to the Trustee by the Company at least fifteen (15) days prior to
the mailing, in accordance with SECTION 3.04, of the notice of Redemption
(unless a shorter notice period shall be satisfactory to the Trustee).

3.03 SELECTION OF SECURITIES TO BE REDEEMED.

     If the Company has elected to redeem less than all the Securities pursuant
to PARAGRAPH 6 of the Securities, the Trustee shall, within five (5) Business
Days after receiving the notice specified in SECTION 3.02, select the Securities
to be redeemed by lot, on a pro rata basis or in accordance with any other
method the Trustee considers fair and appropriate. The Trustee shall make such
selection from Securities then outstanding and not already to be redeemed by
virtue of having been previously called for Redemption. The Trustee may select
for Redemption portions of the principal amount of Securities that have
denominations larger than $1,000 principal amount. Securities and portions of
them the Trustee selects for Redemption shall be in amounts of $1,000 principal
amount or integral multiples of $1,000 principal amount. The Trustee shall
promptly notify the Company in writing of the Securities selected for Redemption
and the principal amount thereof to be redeemed.

     The Registrar need not register the transfer of or exchange any Securities
that have been selected for Redemption, except the unredeemed portion of the
Securities being redeemed in part.

3.04 NOTICE OF REDEMPTION.

     At least thirty (30) days but not more than sixty (60) days before a
Redemption Date, the Company shall mail, or cause to be mailed, by first-class
mail a notice of Redemption to each Holder whose Securities are to be redeemed,
at the address of such Holder appearing in the security register.

     The notice shall identify the Securities and the aggregate principal amount
thereof to be redeemed pursuant to the Redemption and shall state:

          (i) the Redemption Date;

          (ii) the Redemption Price plus accrued and unpaid interest, if any,
     to, but excluding, the Redemption Date;

          (iii) the Conversion Rate and the Conversion Price;


                                      -21-



          (iv) the names and addresses of the Paying Agent and the Conversion
     Agent;

          (v) that the right to convert the Securities called for Redemption
     will terminate at the close of business on the Business Day immediately
     preceding the Redemption Date, unless there shall be a Default in the
     payment of the Redemption Price or accrued and unpaid interest, if any,
     payable as herein provided upon Redemption;

          (vi) that Holders who want to convert Securities must satisfy the
     requirements of ARTICLE X;

          (vii) the paragraph of the Securities pursuant to which the Securities
     are to be redeemed;

          (viii) that Securities called for Redemption must be surrendered to
     the Paying Agent to collect the Redemption Price plus accrued and unpaid
     interest, if any, payable as herein provided upon Redemption;

          (ix) that, unless there shall be a Default in the payment of the
     Redemption Price or accrued and unpaid interest, if any, payable as herein
     provided upon Redemption (including, where the Redemption Date is after a
     record date for the payment of an installment of interest and on or before
     the related interest payment date, the payment, on such interest payment
     date, of accrued and unpaid interest to, but excluding, such interest
     payment date to the Holder of record at the close of business on such
     record date), interest on Securities called for Redemption ceases to accrue
     on and after the Redemption Date, except as otherwise provided herein, such
     Securities will cease to be convertible after the close of business on the
     Business Day immediately preceding the Redemption Date, and all rights of
     the Holders of such Securities shall terminate on and after the Redemption
     Date, other than the right to receive, upon surrender of such Securities
     and in accordance with this Indenture, the amounts due hereunder on such
     Securities upon Redemption (and the rights of the Holder(s) of record of
     such Securities to receive, on the applicable interest payment date,
     accrued and unpaid interest in accordance herewith in the event the
     Redemption Date is after a record date for the payment of an installment of
     interest and on or before the related interest payment date); and

          (x) the CUSIP number or numbers, as the case may be, of the
     Securities.

     The right, pursuant to ARTICLE X, to convert Securities called for
Redemption shall terminate at the close of business on the Business Day
immediately preceding the Redemption Date, unless there shall be a Default in
the payment of the Redemption Price or accrued and unpaid interest, if any,
payable as herein provided upon Redemption.

     At the Company's request, upon reasonable prior notice, the Trustee shall
mail the notice of Redemption in the Company's name and at the Company's
expense; provided, however, that the form and content of such notice shall be
prepared by the Company.


                                      -22-



3.05 EFFECT OF NOTICE OF REDEMPTION.

     Once notice of Redemption is mailed, Securities called for Redemption
become due and payable on the Redemption Date at the consideration set forth
herein, and, on and after such Redemption Date (unless there shall be a Default
in the payment of such consideration), except as otherwise provided herein, such
Securities shall cease to bear interest, and all rights of the Holders of such
Securities shall terminate, other than the right to receive such consideration
upon surrender of such Securities to the Paying Agent.

     If any Security shall not be fully and duly paid in accordance herewith
upon Redemption, the principal of, and accrued and unpaid interest on, such
Security shall, until paid, bear interest at the rate borne by such Security on
the principal amount of such Security, and such Security shall continue to be
convertible pursuant to ARTICLE X.

     Notwithstanding anything herein to the contrary, there shall be no purchase
of any Securities pursuant to a Redemption if the principal amount of the
Securities has been accelerated pursuant to SECTION 6.02 and such acceleration
shall not have been rescinded on or before the applicable Redemption Date. The
Paying Agent will promptly return to the respective Holders thereof any
Securities tendered to it for Redemption during the continuance of such an
acceleration.

3.06 DEPOSIT OF REDEMPTION PRICE.

     Prior to 10:00 A.M., New York City time on the Redemption Date, the Company
shall deposit with a Paying Agent (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust in accordance with SECTION 2.04)
money, in funds immediately available on the Redemption Date, sufficient to pay
the consideration payable as herein provided upon Redemption on all Securities
to be redeemed on that date. The Paying Agent shall return to the Company, as
soon as practicable, any money not required for that purpose.

3.07 SECURITIES REDEEMED IN PART.

     Any Security to be submitted for Redemption only in part shall be delivered
pursuant to SECTION 3.05 (with, if the Company or the Trustee so requires, due
endorsement by, or a written instrument of transfer in form satisfactory to the
Company and the Trustee duly executed by, the Holder thereof or its attorney
duly authorized in writing), and the Company shall execute, and the Trustee
shall authenticate and make available for delivery to the Holder of such
Security without service charge, a new Security or Securities, of any authorized
denomination as requested by such Holder, of the same tenor and in aggregate
principal amount equal to the portion of such Security not submitted for
Redemption.

     If any Security selected for partial Redemption is converted in part, the
principal of such Security subject to Redemption shall be reduced by the
principal amount of such Security that is converted.


                                      -23-



3.08 PURCHASE OF SECURITIES AT OPTION OF THE HOLDER.

     (A) At the option of the Holder thereof, Securities (or portions thereof
that are integral multiples of $1,000 in principal amount) shall be purchased by
the Company pursuant to PARAGRAPH 8 of the Securities on November 15, 2011,
November 15, 2016 and November 15, 2021 (each, an "OPTION PURCHASE DATE"), at a
purchase price, payable in cash, equal to one hundred percent (100%) of the
principal amount of the Securities (or such portions thereof) to be so purchased
(the "OPTION PURCHASE PRICE"), plus accrued and unpaid interest, if any, to, but
excluding, the applicable Option Purchase Date (provided, that such accrued and
unpaid interest shall be paid to the Holder of record of such Securities at the
close of business on the record date immediately preceding such Option Purchase
Date), upon:

          (i) delivery to the Company (if it is acting as its own Paying Agent),
     or to a Paying Agent designated by the Company for such purpose in the
     Option Purchase Notice, by such Holder, at any time from the opening of
     business on the date that is twenty (20) Business Days prior to the
     applicable Option Purchase Date until the close of business on the Business
     Day immediately preceding the applicable Option Purchase Date, of a
     Purchase Notice, in the form set forth in the Securities or any other form
     of written notice substantially similar thereto, in each case, duly
     completed and signed, with appropriate signature guarantee, stating:

               (a) the certificate number(s) of the Securities which the Holder
          will deliver to be purchased, if such Securities are in certificated
          form;

               (b) the principal amount of Securities to be purchased, which
          must be $1,000 or an integral multiple thereof; and

               (c) that such principal amount of Securities are to be purchased
          as of the applicable Option Purchase Date pursuant to the terms and
          conditions specified in PARAGRAPH 8 of the Securities and in this
          Indenture; and

          (ii) delivery to the Company (if it is acting as its own Paying
     Agent), or to a Paying Agent designated by the Company for such purpose in
     the Option Purchase Notice, at any time after delivery of such Purchase
     Notice, of such Securities (together with all necessary endorsements), such
     delivery being a condition to receipt by the Holder of the Option Purchase
     Price therefor plus accrued and unpaid interest, if any, payable as herein
     provided upon Purchase at Holder's Option (provided, however, that the
     Holder of record of such Securities on the record date immediately
     preceding such Option Purchase Date need not surrender such Securities in
     order to be entitled to receive, on the Option Purchase Date, the accrued
     and unpaid interest due thereon).

     If such Securities are held in book-entry form through the Depositary, the
Purchase Notice shall comply with applicable procedures of the Depositary.

     Upon such delivery of Securities to the Company (if it is acting as its own
Paying Agent) or such Paying Agent, such Holder shall be entitled to receive
from the Company or such Paying Agent, as the case may be, a nontransferable
receipt of deposit evidencing such delivery.


                                      -24-



     Notwithstanding anything herein to the contrary, any Holder that has
delivered the Purchase Notice contemplated by this SECTION 3.08(A) to the
Company (if it is acting as its own Paying Agent) or to a Paying Agent
designated by the Company for such purpose in the Option Purchase Notice shall
have the right to withdraw such Purchase Notice by delivery, at any time prior
to the close of business on the Business Day immediately preceding the
applicable Option Purchase Date, of a written notice of withdrawal to the
Company (if acting as its own Paying Agent) or the Paying Agent, which notice
shall contain the information specified in SECTION 3.08(B)(VII).

     The Paying Agent shall promptly notify the Company of the receipt by it of
any Purchase Notice or written notice of withdrawal thereof.

     (B) The Company shall give notice (the "OPTION PURCHASE NOTICE") on a date
not less than twenty (20) Business Days prior to each Option Purchase Date to
each Holder at its address shown in the register of the Registrar and to each
beneficial owner as required by applicable law. Such notice shall state:

          (i) the Option Purchase Price plus accrued and unpaid interest, if
     any, to, but excluding, such Option Purchase Date and the Conversion Rate;

          (ii) the names and addresses of the Paying Agent and the Conversion
     Agent;

          (iii) that Securities with respect to which a Purchase Notice is given
     by a Holder may be converted pursuant to ARTICLE X, if otherwise
     convertible in accordance with ARTICLE X, only if such Purchase Notice has
     been withdrawn in accordance with this SECTION 3.08 or if there shall be a
     Default in the payment of such Option Purchase Price or in accrued and
     unpaid interest, if any, payable as herein provided upon Purchase at
     Holder's Option;

          (iv) that Securities must be surrendered to the Paying Agent to
     collect payment of the Option Purchase Price plus (if such Holder was the
     Holder of record of the applicable Security at the close of business on the
     record date immediately preceding the Option Purchase Date) accrued and
     unpaid interest, if any, payable as herein provided upon Purchase at
     Holder's Option;

          (v) that the Option Purchase Price, plus accrued and unpaid interest,
     if any, to, but excluding, such Option Purchase Date, for any Security as
     to which a Purchase Notice has been given and not withdrawn will be paid as
     promptly as practicable, but in no event later than the later of such
     Option Purchase Date or the time of delivery of the Security as described
     in CLAUSE (IV) above; provided, however, that such accrued and unpaid
     interest shall be paid, on the applicable interest payment date, to the
     Holder of record of such Security at the close of business on the record
     date immediately preceding such Option Purchase Date;

          (vi) the procedures the Holder must follow to exercise rights under
     this SECTION 3.08 (including the name and address of the Paying Agent) and
     a brief description of those rights;


                                      -25-



          (vii) that a Holder will be entitled to withdraw its election in the
     Purchase Notice if the Company (if acting as its own Paying Agent) or the
     Paying Agent receives, at any time prior to the close of business on the
     Business Day immediately preceding the applicable Option Purchase Date, or
     such longer period as may be required by law, a letter or telegram, telex
     or facsimile transmission (receipt of which is confirmed and promptly
     followed by a letter) setting forth (I) the name of such Holder, (II) a
     statement that such Holder is withdrawing its election to have Securities
     purchased by the Company on such Option Purchase Date pursuant to a
     Purchase at Holder's Option, (III) the certificate number(s) of such
     Securities to be so withdrawn, if such Securities are in certificated form,
     (IV) the principal amount of the Securities of such Holder to be so
     withdrawn, which amount must be $1,000 or an integral multiple thereof and
     (V) the principal amount, if any, of the Securities of such Holder that
     remain subject to the Purchase Notice delivered by such Holder in
     accordance with this SECTION 3.08, which amount must be $1,000 or an
     integral multiple thereof;

          (viii) that, except as otherwise provided herein, on and after the
     applicable Option Purchase Date (unless there shall be a Default in the
     payment of the consideration payable as herein provided upon a Purchase at
     Holder's Option), interest on Securities subject to Purchase at Holder's
     Option will cease to accrue, and all rights of the Holders of such
     Securities shall terminate, other than the right to receive, in accordance
     herewith, the consideration payable as herein provided upon a Purchase at
     Holder's Option; and

          (ix) the CUSIP number or numbers, as the case may be, of the
     Securities.

     At the Company's request, upon at least ten (10) Business Days' prior
notice, the Trustee shall mail such Option Purchase Notice in the Company's name
and at the Company's expense; provided, however, that the form and content of
such Option Purchase Notice shall be prepared by the Company.

     No failure of the Company to give an Option Purchase Notice shall limit any
Holder's right to exercise its rights to require the Company to purchase such
Holder's Securities pursuant to a Purchase at Holder's Option.

     (C) Subject to the provisions of this SECTION 3.08, the Company shall pay,
or cause to be paid, the Option Purchase Price, plus accrued and unpaid
interest, if any, to, but excluding, the applicable Option Purchase Date, with
respect to each Security subject to Purchase at Holder's Option to the Holder
thereof as promptly as practicable, but in no event later than the later of the
applicable Option Purchase Date and the time such Security (together with all
necessary endorsements) is surrendered to the Paying Agent; provided, however,
that such accrued and unpaid interest shall be paid, on the applicable interest
payment date, to the Holder of record of such Security at the close of business
on the record date immediately preceding such Option Purchase Date.

     (D) Prior to 10:00 A.M., New York City time on the applicable Option
Purchase Date, the Company shall deposit with a Paying Agent (or, if the Company
is acting as its own Paying Agent, segregate and hold in trust in accordance
with SECTION 2.04) money, in funds immediately


                                      -26-



available on the applicable Option Purchase Date, sufficient to pay the Option
Purchase Price, plus accrued and unpaid interest, if any, to, but excluding,
such Option Purchase Date, of all of the Securities that are to be purchased by
the Company on such Option Purchase Date pursuant to a Purchase at Holder's
Option. The Paying Agent shall return to the Company, as soon as practicable,
any money not required for that purpose.

     (E) Once the Purchase Notice has been duly delivered in accordance with
this SECTION 3.08, the Securities to be purchased pursuant to the Purchase at
Holder's Option shall, on the applicable Option Purchase Date, become due and
payable in accordance herewith, and, on and after such date (unless there shall
be a Default in the payment of the consideration payable as herein provided upon
a Purchase at Holder's Option), except as otherwise herein provided, such
Securities shall cease to bear interest, and all rights of the Holders of such
Securities shall terminate, other than the right to receive, in accordance
herewith, the such consideration.

     (F) Securities with respect to which a Purchase Notice has been duly
delivered in accordance with this SECTION 3.08 may be converted pursuant to
ARTICLE X, if otherwise convertible in accordance with ARTICLE X, only if such
Purchase Notice has been withdrawn in accordance with this SECTION 3.08 or if
there shall be a Default in the payment of the consideration payable as herein
provided upon a Purchase at Holder's Option.

     (G) If any Security subject to Purchase at Holder's Option shall not be
paid in accordance herewith, the principal of, and accrued and unpaid interest
on, such Security shall, until paid, bear interest, payable in cash, at the rate
borne by such Security on the principal amount of such Security, and such
Security shall continue to be convertible pursuant to ARTICLE X.

     (H) Any Security which is to be submitted for Purchase at Holder's Option
only in part shall be delivered pursuant to this SECTION 3.08 (with, if the
Company or the Trustee so requires, due endorsement by, or a written instrument
of transfer in form satisfactory to the Company and the Trustee duly executed
by, the Holder thereof or its attorney duly authorized in writing), and the
Company shall execute, and the Trustee shall authenticate and make available for
delivery to the Holder of such Security without service charge, a new Security
or Securities, of any authorized denomination as requested by such Holder, of
the same tenor and in aggregate principal amount equal to the portion of such
Security not submitted for Purchase at Holder's Option.

     (I) Notwithstanding anything herein to the contrary, there shall be no
purchase of any Securities pursuant to this SECTION 3.08 if the principal amount
of the Securities has been accelerated pursuant to SECTION 6.02 and such
acceleration shall not have been rescinded on or before the applicable Option
Purchase Date. The Paying Agent will promptly return to the respective Holders
thereof any Securities tendered to it for Purchase at Holder's Option during the
continuance of such an acceleration.

     (J) Notwithstanding anything herein to the contrary, if the option granted
to Holders to require the purchase of the Securities on the applicable Option
Purchase Date is determined to constitute a tender offer, the Company shall
comply with all applicable tender offer rules under the Exchange Act, including
Rule 13e-4 and Regulation 14E thereunder, and with all other


                                      -27-



applicable laws, and will file a Schedule TO or any other schedules required
under the Exchange Act or any other applicable laws.

3.09 OFFER TO REPURCHASE AT OPTION OF HOLDER UPON A CHANGE IN CONTROL.

     (A) In the event any Change in Control (as defined below) shall occur, the
Company shall make an offer (the "CHANGE IN CONTROL OFFER") to each Holder to
repurchase, and each Holder of Securities shall have the corresponding right
(the "CHANGE IN CONTROL REPURCHASE RIGHT") (and not an obligation) to require
the Company to repurchase, all of such Holder's Securities (or portions thereof
that are integral multiples of $1,000 in principal amount), on a date selected
by the Company (the "CHANGE IN CONTROL REPURCHASE DATE"), which Change in
Control Repurchase Date shall be no later than thirty five (35) days, nor
earlier than twenty (20) days, after the date the Change in Control Notice (as
defined below) is mailed in accordance with SECTION 3.09(B), at a price, payable
in cash, equal to one hundred percent (100%) of the principal amount of the
Securities (or portions thereof) to be so repurchased (the "CHANGE IN CONTROL
REPURCHASE PRICE"), plus accrued and unpaid interest, if any, to, but excluding,
the Change in Control Repurchase Date, upon:

          (i) delivery to the Company (if it is acting as its own Paying Agent),
     or to a Paying Agent designated by the Company for such purpose in the
     Change in Control Notice, no later than the close of business on the
     Business Day immediately preceding the Change in Control Repurchase Date,
     of a Purchase Notice, in the form set forth in the Securities or any other
     form of written notice substantially similar thereto, in each case, duly
     completed and signed, with appropriate signature guarantee, stating:

               (a) the certificate number(s) of the Securities which the Holder
          will deliver to be repurchased, if such Securities are in certificated
          form;

               (b) the principal amount of Securities to be repurchased, which
          must be $1,000 or an integral multiple thereof; and

               (c) that such principal amount of Securities are to be
          repurchased pursuant to the terms and conditions specified in
          PARAGRAPH 9 of the Securities and in this Indenture; and

     (ii) delivery to the Company (if it is acting as its own Paying Agent), or
to a Paying Agent designated by the Company for such purpose in the Change in
Control Notice, at any time after the delivery of such Purchase Notice, of such
Securities (together with all necessary endorsements) with respect to which the
Change in Control Repurchase Right is being exercised;

     provided, however, that if such Change in Control Repurchase Date is after
a record date for the payment of an installment of interest and on or before the
related interest payment date, then the accrued and unpaid interest, if any, to,
but excluding, such interest payment date will be paid on such interest payment
date to the Holder of record of such Securities at the close of business on such
record date (without any surrender of such Securities by such Holder), and the
Holder surrendering such Securities for repurchase will not be entitled to any
such accrued and unpaid


                                      -28-



interest unless such Holder was also the Holder of record of such Securities at
the close of business on such record date.

     If such Securities are held in book-entry form through the Depositary, the
Purchase Notice shall comply with applicable procedures of the Depositary.

     Upon such delivery of Securities to the Company (if it is acting as its own
Paying Agent) or such Paying Agent, such Holder shall be entitled to receive
from the Company or such Paying Agent, as the case may be, a nontransferable
receipt of deposit evidencing such delivery.

     Notwithstanding anything herein to the contrary, any Holder that has
delivered the Purchase Notice contemplated by this SECTION 3.09(A) to the
Company (if it is acting as its own Paying Agent) or to a Paying Agent
designated by the Company for such purpose in the Change in Control Notice shall
have the right to withdraw such Purchase Notice by delivery, at any time prior
to the close of business on the Business Day immediately preceding the Change in
Control Repurchase Date, of a written notice of withdrawal to the Company (if
acting as its own Paying Agent) or the Paying Agent, which notice shall contain
the information specified in SECTION 3.09(B)(XI).

     The Paying Agent shall promptly notify the Company of the receipt by it of
any Purchase Notice or written notice of withdrawal thereof.

     (B) Within five (5) Business Days after the occurrence of a Change in
Control, the Company shall mail, or cause to be mailed, to all Holders of record
of the Securities at their addresses shown in the register of the Registrar, and
to beneficial owners as required by applicable law, a notice (the "CHANGE IN
CONTROL NOTICE") of the occurrence of such Change in Control and the Change in
Control Repurchase Right arising as a result thereof. The Company shall deliver
a copy of the Change in Control Notice to the Trustee and shall cause a copy to
be published at the expense of the Company in THE NEW YORK TIMES or THE WALL
STREET JOURNAL or another newspaper of national circulation in the United
States.

     Each Change in Control Notice shall state:

          (i) the events causing the Change in Control and the corresponding
     Change in Control Offer;

          (ii) the date of such Change in Control;

          (iii) the Change in Control Repurchase Date;

          (iv) the date by which the Change in Control Repurchase Right must be
     exercised;

          (v) the Change in Control Repurchase Price plus accrued and unpaid
     interest, if any, to, but excluding, the Change in Control Repurchase Date;

          (vi) the names and addresses of the Paying Agent and the Conversion
     Agent;


                                      -29-



          (vii) a description of the procedures which a Holder must follow to
     exercise the Change in Control Repurchase Right;

          (viii) that, in order to exercise the Change in Control Repurchase
     Right, the Securities must be surrendered for payment of the Change in
     Control Repurchase Price plus accrued and unpaid interest, if any, payable
     as herein provided upon Repurchase Upon Change in Control;

          (ix) that the Change in Control Repurchase Price, plus accrued and
     unpaid interest, if any, to, but excluding, the Change in Control
     Repurchase Date, for any Security as to which a Purchase Notice has been
     given and not withdrawn will be paid as promptly as practicable, but in no
     event more than the later of such Change in Control Repurchase Date and the
     time of delivery of the Security (together with all necessary endorsements)
     as described in CLAUSE (VIII) above; provided, however, that if such Change
     in Control Repurchase Date is after a record date for the payment of an
     installment of interest and on or before the related interest payment date,
     then the accrued and unpaid interest, if any, to, but excluding, such
     interest payment date will be paid on such interest payment date to the
     Holder of record of such Security at the close of business on such record
     date (without any surrender of such Securities by such Holder), and the
     Holder surrendering such Security for repurchase will not be entitled to
     any such accrued and unpaid interest unless such Holder was also the Holder
     of record of such Security at the close of business on such record date;

          (x) that, except as otherwise provided herein, on and after such
     Change in Control Repurchase Date (unless there shall be a Default in the
     payment of the consideration payable as herein provided upon Repurchase
     Upon Change in Control), interest on Securities subject to Repurchase Upon
     Change in Control will cease to accrue, and all rights of the Holders of
     such Securities shall terminate, other than the right to receive, in
     accordance herewith, the consideration payable as herein provided upon
     Repurchase Upon Change in Control;

          (xi) that a Holder will be entitled to withdraw its election in the
     Purchase Notice if the Company (if acting as its own Paying Agent), or the
     Paying Agent receives, prior to the close of business on the Business Day
     immediately preceding the Change in Control Repurchase Date, or such longer
     period as may be required by law, a letter or telegram, telex or facsimile
     transmission (receipt of which is confirmed and promptly followed by a
     letter) setting forth (I) the name of such Holder, (II) a statement that
     such Holder is withdrawing its election to have Securities purchased by the
     Company on such Change in Control Repurchase Date pursuant to a Repurchase
     Upon Change in Control, (III) the certificate number(s) of such Securities
     to be so withdrawn, if such Securities are in certificated form, (IV) the
     principal amount of the Securities of such Holder to be so withdrawn, which
     amount must be $1,000 or an integral multiple thereof and (V) the principal
     amount, if any, of the Securities of such Holder that remain subject to the
     Purchase Notice delivered by such Holder in accordance with this SECTION
     3.09, which amount must be $1,000 or an integral multiple thereof;


                                      -30-



          (xii) the Conversion Rate and any adjustments to the Conversion Rate
     that will result from such Change in Control;

          (xiii) that Securities with respect to which a Purchase Notice is
     given by a Holder may be converted pursuant to ARTICLE X, if otherwise
     convertible in accordance with ARTICLE X, only if such Purchase Notice has
     been withdrawn in accordance with this SECTION 3.09 or if there shall be a
     Default in the payment of the Change in Control Repurchase Price or in the
     accrued and unpaid interest, if any, payable as herein provided upon
     Repurchase Upon Change in Control; and

          (xiv) the CUSIP number or numbers, as the case may be, of the
     Securities.

     At the Company's request, upon at least ten (10) Business Days' prior
notice, the Trustee shall mail such Change in Control Notice in the Company's
name and at the Company's expense; provided, however, that the form and content
of such Change in Control Notice shall be prepared by the Company.

     No failure of the Company to give a Change in Control Notice shall limit
any Holder's right to exercise a Change in Control Repurchase Right.

     (C) Subject to the provisions of this SECTION 3.09, the Company shall pay,
or cause to be paid, the Change in Control Repurchase Price, plus accrued and
unpaid interest, if any, to, but excluding, the Change in Control Repurchase
Date, with respect to each Security as to which the Change in Control Repurchase
Right shall have been exercised to the Holder thereof as promptly as
practicable, but in no event later than the later of the Change in Control
Repurchase Date and the time such Security is surrendered to the Paying Agent;
provided, however, that if such Change in Control Repurchase Date is after a
record date for the payment of an installment of interest and on or before the
related interest payment date, then the accrued and unpaid interest, if any, to,
but excluding, such interest payment date will be paid on such interest payment
date to the Holder of record of such Security at the close of business on such
record date, and the Holder surrendering such Security for repurchase will not
be entitled to any such accrued and unpaid interest unless such Holder was also
the Holder of record of such Security at the close of business on such record
date.

     (D) Prior to 10:00 A.M., New York City time on a Change in Control
Repurchase Date, the Company shall deposit with a Paying Agent (or, if the
Company is acting as its own Paying Agent, segregate and hold in trust in
accordance with SECTION 2.04) money, in funds immediately available on the
Change in Control Repurchase Date, sufficient to pay the consideration payable
as herein provided upon Repurchase Upon Change in Control for all of the
Securities that are to be repurchased by the Company on such Change in Control
Repurchase Date pursuant to a Repurchase Upon Change in Control. The Paying
Agent shall return to the Company, as soon as practicable, any money not
required for that purpose.

     (E) Once the Change in Control Notice and the Purchase Notice have been
duly given in accordance with this SECTION 3.09, the Securities to be
repurchased pursuant to a Repurchase Upon Change in Control shall, on the Change
in Control Repurchase Date, become due and payable in accordance herewith, and,
on and after such date (unless there shall be a Default in the


                                      -31-



payment of the consideration payable as herein provided upon Repurchase Upon
Change in Control), except as otherwise herein provided, such Securities shall
cease to bear interest, and all rights of the Holders of such Securities shall
terminate, other than the right to receive, in accordance herewith, such
consideration.

     (F) Securities with respect to which a Purchase Notice has been duly
delivered in accordance with this SECTION 3.09 may be converted pursuant to
ARTICLE X, if otherwise convertible in accordance with ARTICLE X, only if such
Purchase Notice has been withdrawn in accordance with this SECTION 3.09 or if
there shall be a Default in the payment of the consideration payable as herein
provided upon Repurchase Upon Change in Control.

     (G) If any Security shall not be paid upon surrender thereof for Repurchase
Upon Change in Control, the principal of, and accrued and unpaid interest on,
such Security shall, until paid, bear interest, payable in cash, at the rate
borne by such Security on the principal amount of such Security, and such
Security shall continue to be convertible pursuant to ARTICLE X.

     (H) Any Security which is to be submitted for Repurchase Upon Change in
Control only in part shall be delivered pursuant to this Section 3.09 (with, if
the Company or the Trustee so requires, due endorsement by, or a written
instrument of transfer in form satisfactory to the Company and the Trustee duly
executed by, the Holder thereof or its attorney duly authorized in writing), and
the Company shall execute, and the Trustee shall authenticate and make available
for delivery to the Holder of such Security without service charge, a new
Security or Securities, of any authorized denomination as requested by such
Holder, of the same tenor and in aggregate principal amount equal to the portion
of such Security not duly submitted for Repurchase Upon Change in Control.

     (I) Notwithstanding anything herein to the contrary, there shall be no
purchase of any Securities pursuant to this SECTION 3.09 if the principal amount
of the Securities has been accelerated pursuant to SECTION 6.02 and such
acceleration shall not have been rescinded on or before the applicable Change in
Control Repurchase Date. The Paying Agent will promptly return to the respective
Holders thereof any Securities tendered to it for Repurchase Upon Change in
Control during the continuance of such an acceleration.

     (J) Notwithstanding anything herein to the contrary, if the option granted
to Holders to require the repurchase of the Securities upon the occurrence of a
Change in Control is determined to constitute a tender offer, the Company shall
comply with all applicable tender offer rules under the Exchange Act, including
Rule 13e-4 and Regulation 14E thereunder, and with all other applicable laws,
including, without limitation, the securities laws of Canada, and will file a
Schedule TO or any other schedules required under the Exchange Act or any other
applicable laws.

     (K) A "CHANGE IN CONTROL" shall be deemed to have occurred at such time as:

          (i) any "person" or "group" (as such terms are used in Sections 13(d)
     and 14(d) of the Exchange Act) becomes the "beneficial owner" (as such term
     is used in Rule 13d-3 under the Exchange Act), directly or indirectly, of
     fifty percent (50%) or more of the total outstanding voting power of all
     classes of the Company's Capital


                                      -32-


     Stock entitled to vote generally in the election of directors (such an
     event, an "ACQUISITION OF VOTING CONTROL"); or

          (ii) there occurs a sale, transfer, lease, conveyance or other
     disposition of all or substantially all of the property or assets of the
     Company, or of the Company and the Subsidiaries on a consolidated basis, to
     any "person" or "group" (as such terms are used in Sections 13(d) and 14(d)
     of the Exchange Act), including any group acting for the purpose of
     acquiring, holding, voting or disposing of securities within the meaning of
     Rule 13d-5(b)(1) under the Exchange Act; or

          (iii) the Company consolidates with, or merges with or into, another
     person or any person consolidates with, or merges with or into, the
     Company, unless either:

               (a) the persons that "beneficially owned" (as such term is used
          in Rule 13d-3 under the Exchange Act), directly or indirectly, the
          shares of the Company's Voting Stock immediately prior to such
          consolidation or merger, "beneficially own," directly or indirectly,
          immediately after such consolidation or merger, shares of the
          surviving or continuing corporation's Voting Stock representing at
          least a majority of the total outstanding voting power of all
          outstanding classes of the Voting Stock of the surviving or continuing
          corporation in substantially the same proportion as such ownership
          immediately prior to such consolidation or merger; or

               (b) at least ninety percent (90%) of the consideration (other
          than cash payments for fractional shares or pursuant to statutory
          appraisal rights) in such consolidation or merger consists of common
          stock and any associated rights traded on a U.S. national securities
          exchange (or which will be so traded when issued or exchanged in
          connection with such consolidation or merger), and, as a result of
          such consolidation or merger, the Securities become convertible solely
          (except as to any cash payments for the Principal Return due upon
          conversion, cash payments permitted to be paid hereunder in lieu of
          Common Shares otherwise due upon conversion, and cash due upon
          conversion in lieu of fractional shares) into such common stock and
          associated rights (such a consolidation or merger that satisfies the
          conditions set forth in this CLAUSE (B), a "LISTED STOCK BUSINESS
          COMBINATION"); or

          (iv) the following persons cease for any reason to constitute a
     majority of the Company's Board of Directors:

               (a) individuals who on the Issue Date constituted the Company's
          Board of Directors; and

               (b) any new directors whose election to the Company's Board of
          Directors or whose nomination for election by the Company's
          shareholders was approved by at least a majority of the directors of
          the Company then still in office either who were directors of the
          Company on the Issue Date or whose election or nomination for election
          was previously so approved; or


                                      -33-



          (v) the Company is liquidated or dissolved or the holders of the
     Company's Capital Stock approve any plan or proposal for the liquidation or
     dissolution of the Company.

3.10 REDEMPTION OF SECURITIES FOR TAX REASONS.

     (A) The Company may, at its option, redeem the Securities, in whole but not
in part, at one hundred percent (100%) of the principal amount of the Securities
(the "TAX REDEMPTION PRICE"), plus accrued and unpaid interest, if any, to, but
excluding, the Tax Redemption Date if:

          (i) the Company has become, or would become, obligated to pay to the
     Holder of any Security Additional Amounts that are more than de minimis as
     a result of any change, announced after November 3, 2006, in the laws or
     any regulations of Canada or any Canadian political subdivision or taxing
     authority or any change occurring after November 3, 2006 in the
     interpretation or application of any such laws or regulations by any
     legislative body, court, governmental agency, taxing authority or
     regulatory authority (including the enactment of any legislation and the
     publication of any judicial decision or regulatory or administrative
     determination) (any such change described in this subsection (i), a "CHANGE
     IN CANADIAN TAX LAW");

          (ii) the Company cannot avoid the obligation to pay such non-de
     minimis Additional Amounts by taking reasonable measures available to it;

          (iii) the Company delivers to the Trustee an opinion of Canadian legal
     counsel specializing in taxation and an Officers' Certificate attesting to
     (I) such change in such laws, regulations, interpretation or application
     and (II) the obligation of the Company to pay such non-de minimis
     Additional Amounts; and

          (iv) at least thirty (30) days but not more than sixty (60) days
     before the date (the "TAX REDEMPTION DATE") the Securities are to be
     redeemed pursuant to this SECTION 3.10, the Company mails, or causes to be
     mailed, by first-class mail to each Holder, at the address of such Holder
     appearing in the security register, a written notice of Tax Redemption
     containing the information specified in SECTION 3.10(E); provided, however,
     that (I) the Company shall not mail, or cause to be mailed, a notice of Tax
     Redemption earlier than sixty (60) Business Days prior to the earliest date
     on or from which the Company would be obligated to pay any such non-de
     minimis Additional Amounts and (II) the Company shall not mail, or cause to
     be mailed, a notice of Tax Redemption unless, at the time of such mailing,
     the circumstances creating the Company's obligation to pay such non-de
     minimis Additional Amounts are in effect.

     (B) Except in respect of Excluded Holders, the Company shall not, and shall
not cause any Paying Agent or the Trustee to, deduct from the Tax Redemption
Price, or from the accrued and unpaid interest payable as herein provided upon
Tax Redemption, any amounts on account of, or in respect of, any Canadian
withholding taxes, unless such deduction is required by law (in which case the
Company shall, to the extent it is required to do so under SECTION 4.08, pay
Additional Amounts with respect thereto, except in respect of Excluded Holders).


                                      -34-



     (C) The right, pursuant to ARTICLE X, to convert Securities called for Tax
Redemption shall terminate at the close of business on the Business Day
immediately preceding the Tax Redemption Date.

     (D) A Holder may elect not to have its Securities, or a portion thereof,
redeemed pursuant to a Tax Redemption by delivering to the Paying Agent, no
later than the close of business on the Business Day immediately preceding the
Tax Redemption Date, a duly completed and signed Notice of Election Upon Tax
Redemption (or any other form of written notice substantially similar thereto);
provided, however, that, after such Tax Redemption Date, no Additional Amounts
shall be payable by the Company on any payment of interest or principal with
respect to Securities for which such a Notice of Election Upon Tax Redemption is
so delivered, and all payments by the Company with respect to such Securities
after such Tax Redemption Date shall be subject to the deduction or withholding
of any Canadian Taxes required to be deducted or withheld. A Holder that has not
so delivered such a Notice of Election Upon Tax Redemption shall have its
Securities redeemed pursuant to the Tax Redemption without further action;
provided, however, that such Holder shall have the right to convert such
Securities in accordance with this Indenture. Notwithstanding anything herein to
the contrary, a Holder may withdraw its Notice of Election Upon Tax Redemption
by delivering to the Paying Agent a letter or telegram, telex or facsimile
transmission (receipt of which is confirmed and promptly followed by a letter)
prior to the close of business on the Business Day immediately preceding the Tax
Redemption Date (or such longer period as may be required by law) containing the
information specified in SECTION 3.10(E)(X). The Paying Agent shall promptly
notify the Company of the receipt by it of any such written notice of withdrawal
thereof.

     (E) The notice of Tax Redemption specified in SECTION 3.10(A)(IV) shall
state:

          (i) the Tax Redemption Date;

          (ii) the Tax Redemption Price plus accrued and unpaid interest, if
     any, to, but excluding, the Tax Redemption Date;

          (iii) a description of any Canadian withholding taxes, if any, that
     shall be deducted from the Tax Redemption Price, or such accrued and unpaid
     interest, to be paid pursuant to the Tax Redemption;

          (iv) that the right to convert the Securities will terminate at the
     close of business on the Business Day immediately preceding the Tax
     Redemption Date;

          (v) the Conversion Rate and the Conversion Price;

          (vi) that Holders who want to convert Securities must satisfy the
     requirements of ARTICLE X;

          (vii) the names and addresses of the Paying Agent and the Conversion
     Agent;

          (viii) that a Holder may elect not to have its Securities, or a
     portion thereof, redeemed pursuant to a Tax Redemption by delivering to the
     Paying Agent, no later


                                      -35-


     than the close of business on the Business Day immediately preceding the
     Tax Redemption Date, a duly completed and signed Notice of Election Upon
     Tax Redemption (or any other form of written notice substantially similar
     thereto); provided, however, that after such Tax Redemption Date, no
     Additional Amounts shall be payable by the Company on any payment of
     interest or principal with respect to Securities for which such a Notice of
     Election Upon Tax Redemption is so delivered, and after such Tax Redemption
     Date, all payments by the Company with respect to such Securities, shall be
     subject to the deduction or withholding of any Canadian Taxes required to
     be deducted or withheld;

          (ix) that a Holder that has not so delivered such a Notice of Election
     Upon Tax Redemption shall have its Securities redeemed pursuant to the Tax
     Redemption without further action; provided, however, that such Holder
     shall have the right to convert such Securities in accordance with this
     Indenture;

          (x) that a Holder will be entitled to withdraw its Notice of Election
     Upon Tax Redemption if the Paying Agent receives, prior to the close of
     business on the Business Day immediately preceding the Tax Redemption Date,
     or such longer period as may be required by law, a letter or telegram,
     telex or facsimile transmission (receipt of which is confirmed and promptly
     followed by a letter) setting forth (I) the name of such Holder, (II) a
     statement that such Holder is withdrawing its Notice of Election Upon Tax
     Redemption, (III) the principal amount of the Securities of such Holder to
     be so withdrawn, which amount must be $1,000 or an integral multiple
     thereof, (IV) the certificate number of such Securities to be so withdrawn,
     (V) the principal amount, if any, of the Securities of such Holder that
     remain subject to the Notice of Election Upon Tax Redemption delivered by
     such Holder in accordance with this SECTION 3.10, which amount must be
     $1,000 or an integral multiple thereof;

          (xi) the paragraph of the Securities pursuant to which the Securities
     are to be redeemed;

          (xii) that Securities called for Tax Redemption must be surrendered to
     the Paying Agent to collect the Tax Redemption Price plus accrued and
     unpaid interest, if any, payable as herein provided upon Tax Redemption;

          (xiii) that, unless there shall be a Default in the payment of the Tax
     Redemption Price, or accrued and unpaid interest, if any, payable as herein
     provided upon Tax Redemption, and except to the extent the Holder of such
     Securities elects, pursuant to SECTION 3.10(D), not to have such
     Securities, or a portion thereof, redeemed pursuant to the Tax Redemption,
     interest on Securities called for Tax Redemption ceases to accrue on and
     after the Tax Redemption Date, such Securities will cease to be convertible
     after the close of business on the Business Day immediately preceding the
     Tax Redemption Date; and

          (xiv) the CUSIP number or numbers, as the case may be, of the
     Securities.


                                      -36-



     At the Company's request, upon reasonable prior written notice, the Trustee
shall give such notice of Tax Redemption in the Company's name and at the
Company's expense; provided that the form and content of such notice shall be
prepared by the Company.

     (F) If the Company elects to redeem Securities pursuant to this SECTION
3.10, it shall notify the Trustee of the Tax Redemption Date at least fifteen
(15) days prior to the mailing of the notice of Tax Redemption specified in
SECTION 3.10(A)(IV) (unless a shorter notice period shall be satisfactory to the
Trustee).

     (G) Except to the extent Holders elect, pursuant to SECTION 3.10(D), not to
have their Securities, or a portion thereof, redeemed pursuant to the Tax
Redemption, once the notice of Tax Redemption specified in SECTION 3.10(A)(IV)
is mailed, the Securities shall become due and payable on the Tax Redemption
Date at the Tax Redemption Price plus accrued and unpaid interest to, but
excluding, the Tax Redemption Date, and, on and after such Tax Redemption Date
(unless there shall be a Default in the payment of the Tax Redemption Price or
such accrued and unpaid interest), the Securities shall cease to bear interest,
and all rights of the Holders of such Securities shall terminate, other than the
right to receive, upon surrender of such Securities and subject to the next
sentence, the Tax Redemption Price and such accrued and unpaid interest. Upon
surrender to the Paying Agent of a Security subject to Tax Redemption, such
Security shall be paid at the Tax Redemption Price plus accrued and unpaid
interest to, but excluding, the Tax Redemption Date, unless the Tax Redemption
Date is after a record date for the payment of an installment of interest and on
or before the related interest payment date, in which case the accrued and
unpaid interest to, but excluding, such interest payment date shall be paid, on
such interest payment date, to the Holder of record of such Security at the
close of business on such record date, and the Holder surrendering such Security
for Tax Redemption shall not be entitled to any such interest unless such Holder
was also the Holder of record of such Security at the close of business on such
record date.

     (H) Prior to 10:00 A.M., New York City time on the Tax Redemption Date, the
Company shall deposit with a Paying Agent (or, if the Company is acting as its
own Paying Agent, segregate and hold in trust in accordance with SECTION 2.04)
money, in funds immediately available on the Tax Redemption Date, sufficient to
pay the Tax Redemption Price, plus accrued and unpaid interest to, but
excluding, the Tax Redemption Date, of all Securities to be redeemed on that
date. The Paying Agent shall return to the Company, as soon as practicable, any
money not required for that purpose.

     (I) If any Security shall not be paid upon surrender thereof for Tax
Redemption, the principal of, and accrued and unpaid interest on, such Security
shall, until paid, bear interest from the Tax Redemption Date at the rate borne
by such Security on the principal amount of such Security, and such Security
shall continue to be convertible pursuant to ARTICLE X.

     (J) Any Security which is to be redeemed pursuant to a Tax Redemption only
in part shall be delivered pursuant to this SECTION 3.10 (with, if the Company
or the Trustee so requires, due endorsement by, or a written instrument of
transfer in form satisfactory to the Company and the Trustee duly executed by,
the Holder thereof or its attorney duly authorized in writing), and the Company
shall execute, and the Trustee shall authenticate and make available for
delivery to the Holder of such Security without service charge, a new Security
or Securities, of any


                                      -37-



authorized denomination as requested by such Holder, of the same tenor and in
aggregate principal amount equal to the portion of such Security not submitted
for Tax Redemption.

     (K) Notwithstanding anything herein to the contrary, there shall be no
purchase of any Securities pursuant to a Tax Redemption under this SECTION 3.10
if the principal amount of the Securities has been accelerated pursuant to
SECTION 6.02 and such acceleration shall not have been rescinded on or before
the applicable Tax Redemption Date. The Paying Agent will promptly return to the
respective Holders thereof any Securities tendered to it for Tax Redemption
during the continuance of such an acceleration.

                                  IV. COVENANTS

4.01 PAYMENT OF SECURITIES.

     The Company shall pay all amounts due with respect to the Securities on the
dates and in the manner provided in the Securities. All such amounts shall be
considered paid on the date due if the Paying Agent holds (or, if the Company is
acting as Paying Agent, the Company has segregated and holds in trust in
accordance with SECTION 2.04) on that date money (and/or, if applicable as
provided herein and in accordance herewith, other consideration) sufficient to
pay the amount then due with respect to the Securities (unless there shall be a
Default in the payment of such amounts to the respective Holder(s)).

     The Company shall pay, in cash, interest on any overdue amount (including,
to the extent permitted by applicable law, overdue interest) at the rate borne
by the Securities.

4.02 MAINTENANCE OF OFFICE OR AGENCY.

     The Company will maintain, or cause to be maintained on its behalf, in the
Borough of Manhattan, the City of New York, an office or agency (which may be an
office of the Trustee or an affiliate of the Trustee, Registrar or co-Registrar)
where Securities may be surrendered for registration of transfer or exchange,
payment or conversion and where notices and demands to or upon the Company in
respect of the Securities and this Indenture may be served. The Company will
give prompt written notice to the Trustee of the location, and any change in the
location, of such office or agency. If at any time the Company shall fail to
maintain any such required office or agency or shall fail to furnish the Trustee
with the address thereof, such presentations, surrenders, notices and demands
may be made or served at the Corporate Trust Office of the Trustee.

     The Company may also from time to time designate one or more other offices
or agencies where the Securities may be presented or surrendered for any or all
such purposes and may from time to time rescind such designations; provided,
however, that no such designation or rescission shall in any manner relieve the
Company of its obligation to maintain an office or agency in the Borough of
Manhattan, the City of New York for such purposes. The Company will give prompt
written notice to the Trustee of any such designation or rescission and of any
change in the location of any such other office or agency.


                                      -38-



     The Company hereby designates the Corporate Trust Office of the Trustee as
an agency of the Company in accordance with SECTION 2.03.

4.03 RULE 144A INFORMATION AND ANNUAL REPORTS.

     (A) At any time when the Company is not subject to, or is in violation of,
Sections 13 or 15(d) of the Exchange Act, the Company shall promptly provide to
the Trustee and shall, upon request, provide to any Holder, beneficial owner or
prospective purchaser of Securities or Common Shares issued upon conversion of
any Securities, the information required to be delivered pursuant to Rule
144A(d)(4) under the Securities Act to facilitate the resale of such Securities
or Common Shares pursuant to Rule 144A. The Company shall take such further
action as any Holder or beneficial holder of such Securities or Common Shares
may reasonably request to the extent required from time to time to enable such
Holder or beneficial holder to sell its Securities or Common Shares in
accordance with Rule 144A, as such rule may be amended from time to time.

     (B) The Company shall deliver to the Trustee, as soon as reasonably
practicable, but no later than two (2) Business Days after the time such report
is required to be filed with the SEC pursuant to the Exchange Act, a copy of
each report the Company is required to file with the SEC pursuant to Section 13
or 15(d) of the Exchange Act; provided, however, that the Company shall not be
required to deliver to the Trustee any material for which the Company has sought
and received confidential treatment by the SEC; provided further, each such
report will be deemed to be so delivered to the Trustee if the Company files
such report with the SEC through the SEC's EDGAR database no later than the time
such report is required to be filed with the SEC pursuant to the Exchange Act.
In the event the Company is at any time no longer subject to the reporting
requirements of Section 13 or Section 15(d) of the Exchange Act, the Company
shall continue to provide to the Trustee, within thirty (30) calendar days after
the date the Company would have been required to file such reports with the SEC,
annual and quarterly consolidated financial statements substantially equivalent
to financial statements that would have been included in reports filed with the
SEC if the Company were subject to the reporting requirements of Section 13 or
Section 15(d) of the Exchange Act, including, with respect to annual information
only, a report thereon by the Company's certified independent public accountants
as such would be required in such reports filed with the SEC and, in each case,
together with a management's discussion and analysis of financial condition and
results of operations which would be so required. The Company also shall comply
with the other provisions of TIA Section 314(a). Delivery of such reports,
information and documents to the Trustee is for informational purposes only, and
the Trustee's receipt thereof shall not constitute constructive notice of any
information contained therein or determinable from information contained
therein, including the Company's compliance with any of its covenants hereunder
(as to which the Trustee is entitled to rely exclusively on Officers'
Certificates).

4.04 COMPLIANCE CERTIFICATE.

     The Company shall deliver to the Trustee, within ninety (90) calendar days
after the end of each fiscal year of the Company, or, if earlier, by the date
the Company is, or would be, required to file with the SEC the Company's annual
report (whether on Form 10-K under the Exchange Act or another appropriate form)
for such fiscal year, an Officers' Certificate stating


                                      -39-



whether or not the signatories to such Officers' Certificate know of any Default
or Event of Default by the Company in performing any of its obligations under
this Indenture or the Securities. At least one (1) of the Officers executing
such Officers' Certificate shall be the chief executive officer or the chief
financial officer (or persons performing similar functions) of the Company. If
such signatories do know of any such Default or Event of Default, then such
Officers' Certificate shall describe the Default or Event of Default and its
status.

4.05 STAY, EXTENSION AND USURY LAWS.

     The Company covenants (to the extent that it may lawfully do so) that it
will not at any time insist upon, plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay, extension or usury law wherever
enacted, now or at any time hereafter in force, which may affect the covenants
or the performance of this Indenture; and the Company (in each case, to the
extent that it may lawfully do so) hereby expressly waives all benefit or
advantage of any such law, and covenants that it will not, by resort to any such
law, hinder, delay or impede the execution of any power herein granted to the
Trustee, but will suffer and permit the execution of every such power as though
no such law has been enacted.

4.06 CORPORATE EXISTENCE.

     Subject to ARTICLE V, the Company will do or cause to be done all things
necessary to preserve and keep in full force and effect its corporate existence
and the corporate existence of each of its Subsidiaries, in accordance with the
respective organizational documents of the Company and of each Subsidiary, and
the rights (charter and statutory), licenses and franchises of the Company and
its Subsidiaries; provided, however, that the Company shall not be required to
preserve any such right, license or franchise, or the corporate existence of any
Subsidiary, if in the good faith judgment of the Board of Directors (i) such
preservation or existence is not material to the conduct of business of the
Company and (ii) the loss of such right, license or franchise or the dissolution
of such Subsidiary does not have a material adverse impact on the Holders.

4.07 NOTICE OF DEFAULT.

     In the event that any Default or Event of Default shall occur, the Company
shall give prompt written notice of such Default or Event of Default, and any
remedial action proposed to be taken, to the Trustee.

4.08 PAYMENT OF ADDITIONAL AMOUNTS.

     All payments made by or on behalf of the Company under or with respect to
the Securities shall be made free and clear of, and without withholding or
deduction for, or on account of, any present or future tax, duty, levy, impost,
assessment or other governmental charge imposed or levied by or on behalf of the
Government of Canada or of any province, territory or political subdivision
thereof or by any authority or agency therein or thereof having power to tax,
including without limitation any taxes imposed under Part XIII of the Canadian
Income Tax Act ("CANADIAN TAXES"), unless the Company is required to withhold or
deduct any amounts for, or on account of, Canadian Taxes pursuant to any
applicable law or by virtue of the interpretation or administration thereof. If
the Company is, as a result of a Change in Canadian


                                      -40-



Tax Law that occurs after November 9, 2006, so required to withhold or deduct
any amount for, or on account of, Canadian Taxes from any payment made under or
with respect to the Securities, then the Company shall pay, in cash, such
additional amounts (such payments, together with the similar payments to be made
by the Company pursuant to the immediately succeeding sentence, "ADDITIONAL
AMOUNTS") as may be necessary so that the net amount received by each Holder
(including Additional Amounts) after such withholding or deduction (including
any withholding or deduction required to be made in respect of Additional
Amounts) will not be less than the amount the Holder would have received if such
Canadian Taxes had not been withheld or deducted. The Company shall make a
payment similar to an Additional Amount to Holders, other than Excluded Holders
(as defined below) in respect of whom the Company is not required to withhold
Canadian Taxes but who are required, solely as a result of a Change in Canadian
Tax Law, to pay tax under Part XIII of the Canadian Income Tax Act on amounts
otherwise subject to withholding; provided, that no Additional Amounts or
similar payments shall be payable with respect to a payment made to a Holder in
respect of a beneficial owner of Securities (an "EXCLUDED HOLDER") (i) with
which the Company does not deal at arm's length (within the meaning of the
Canadian Income Tax Act) at the time of making such payment, (ii) which is
subject to such Canadian Taxes by reason of its failure to comply with any
certification, identification, information, documentation or other reporting
requirement if compliance is required by law, regulation, administrative
practice or an applicable treaty as a precondition to exemption from, or a
reduction in the rate of deduction or withholding of, such Canadian Taxes, (iii)
which has executed a Notice of Election Upon Tax Redemption, and has not
withdrawn such Notice of Election Upon Tax Redemption, in accordance herewith or
(iv) which is subject to such Canadian Taxes by reason of carrying on business
in Canada or any province or territory thereof other than solely by virtue of
holding Securities. If the Company shall be required to make such withholding or
deduction, the Company shall remit the full amount deducted or withheld to the
relevant tax or receiving authority in accordance with, and within the time
required by, applicable law. The Company shall furnish to the Trustee, within
thirty (30) days after the date the payment of any Canadian Taxes are due
pursuant to applicable law, certified copies of tax receipts evidencing such
payment by the Company. The Company shall indemnify and hold harmless each
Holder (other than Excluded Holders), and, upon written request, reimburse such
Holder, for the amount of (I) any Canadian Taxes not withheld or deducted by the
Company and levied or imposed on and paid by such Holder or beneficial owner as
a result of payments that (A) are made under or with respect to the Securities
and (B) are payable as a result of a Change in Canadian Tax Law, (II) any
liability (including penalties, interest and expenses) arising therefrom or with
respect thereto, (III) any Canadian Taxes imposed with respect to any payment
made under clauses (I) or (II) above and (IV) any amount of tax (including
interest, penalty or expenses) for which a beneficial owner of Securities would
be liable for in its jurisdiction of residence as a result of the payment of
Additional Amounts and for which a foreign tax credit or similar relief or
remission would not be available. Holders shall be required to complete and file
any applicable forms with, or provide certification to, the relevant tax
authorities as reasonably requested by the Company.

     At least thirty (30) days prior to each date on which any payment under or
with respect to the Securities is due and payable, if the Company is aware that
it will be obligated to pay any Additional Amounts with respect to such payment,
the Company shall deliver to the Trustee an Officers' Certificate stating the
fact that such Additional Amounts will be payable and the


                                      -41-



amounts so payable and setting forth such other information necessary to enable
the Trustee to pay such Additional Amounts to Holders on the relevant payment
date.

     Whenever in this Indenture or the Securities there is reference, in any
context, to the payment of principal and interest or any other amount payable
under or with respect to any Security, such reference shall be deemed to include
the payment of Additional Amounts provided for in this SECTION 4.08 to the
extent that, in such context, Additional Amounts are, were or would be payable
in respect of such payment. Without limiting the generality of the foregoing,
references herein to the Option Purchase Price, Redemption Price, Tax Redemption
Price, Change in Control Repurchase Price, Conversion Consideration, Make-Whole
Consideration, principal amount, interest (including, without limitation,
additional interest, interest payable as herein provided on a scheduled interest
payment date and accrued and unpaid interest payable as herein provided upon
Repurchase at Holder's Option, Redemption, Tax Redemption, Repurchase Upon
Change in Control or maturity) shall be deemed to include, in each case,
Additional Amounts to the extent Additional Amounts are or would be payable with
respect thereto.

4.09 FURTHER INSTRUMENTS AND ACTS.

     The Company shall execute and deliver such further instruments and do such
further acts as may be reasonably necessary or proper to carry out more
effectively the purposes of this Indenture.

                                  V. SUCCESSORS

5.01 WHEN COMPANY MAY MERGE, ETC.

     The Company shall not consolidate with, or amalgamate or merge with or
into, or sell, transfer, lease, convey or otherwise dispose of all or
substantially all of the property or assets of the Company, or of the Company
and the Subsidiaries on a consolidated basis, to, another person (including
pursuant to a statutory arrangement), whether in a single transaction or series
of related transactions, unless (i) such other person is a corporation organized
and existing under the laws of the United States, any State thereof or the
District of Columbia or the laws of Canada or any province or territory thereof;
(ii) such person assumes by supplemental indenture all the obligations of the
Company under the Securities and this Indenture; and (iii) immediately after
giving effect to such transaction or series of transactions, no Default or Event
of Default shall exist.

     The Company shall deliver to the Trustee prior to the consummation of the
proposed transaction an Officers' Certificate to the foregoing effect and an
Opinion of Counsel (which may rely upon such Officers' Certificate as to the
absence of Defaults and Events of Default) stating that the proposed transaction
and such supplemental indenture will, upon consummation of the proposed
transaction, comply with this Indenture.


                                      -42-



5.02 SUCCESSOR SUBSTITUTED.

     Upon any consolidation, merger or any sale, transfer, lease, conveyance or
other disposition of all or substantially all of the property or assets of the
Company, or of the Company and the Subsidiaries on a consolidated basis, the
successor person formed by such consolidation or into which the Company is
merged or to which such sale, transfer, lease, conveyance or other disposition
is made shall succeed to, and, except in the case of a lease, be substituted
for, and may exercise every right and power of, and shall assume every duty and
obligation of, the Company under this Indenture with the same effect as if such
successor had been named as the Company herein.

                            VI. DEFAULTS AND REMEDIES

6.01 EVENTS OF DEFAULT.

     An "EVENT OF DEFAULT" occurs if:

          (i) the Company fails to pay the principal of, or premium, if any, on,
     any Security when the same becomes due and payable, whether at maturity,
     upon Redemption, on an Option Purchase Date with respect to a Purchase at
     Holder's Option, on a Change in Control Repurchase Date with respect to a
     Repurchase Upon Change in Control or otherwise;

          (ii) the Company fails to pay an installment of interest or additional
     interest on any Security when due, if such failure continues for thirty
     (30) days after the date when due;

          (iii) the Company fails to satisfy its conversion obligations upon
     exercise of a Holder's conversion rights pursuant hereto;

          (iv) the Company fails to timely provide a Change in Control Notice or
     an Option Purchase Notice, or to make the related offer to purchase the
     Securities, as required by the provisions of this Indenture, or fails to
     timely provide any notice pursuant to, and in accordance with, SECTION
     10.14(F);

          (v) the Company fails to comply with any other term, covenant or
     agreement set forth in the Securities or this Indenture and such failure
     continues for the period, and after the notice, specified below;

          (vi) a Termination of Trading occurs and persists for more than twenty
     (20) Trading Day after notice to the Company by the Trustee or to the
     Company and the Trustee by Holders of at least twenty five percent (25%) in
     aggregate principal amount of the Securities then outstanding, in
     accordance with this Indenture;

          (vii) the Company or any of its Subsidiaries defaults in the payment
     when due, after the expiration of any applicable grace period, of principal
     of, or premium, if any, or interest on, Indebtedness for money borrowed
     (other than Indebtedness between


                                      -43-



     the Company and the Subsidiaries), in the aggregate principal amount then
     outstanding of five million dollars ($5,000,000) or more, or the
     acceleration of Indebtedness of the Company or any of its Subsidiaries for
     money borrowed in such aggregate principal amount or more so that it
     becomes due and payable prior to the date on which it would otherwise
     become due and payable and such default is not cured or waived, or such
     acceleration is not rescinded, within thirty (30) days after notice to the
     Company by the Trustee or to the Company and the Trustee by Holders of at
     least twenty five percent (25%) in aggregate principal amount of the
     Securities then outstanding, each in accordance with this Indenture;

          (viii) the Company or any of its Subsidiaries fails to pay final
     judgments, the aggregate uninsured portion of which is at least five
     million dollars ($5,000,000), and such judgments are not paid or discharged
     within thirty (30) days;

          (ix) the Company or any of its Significant Subsidiaries or any group
     of Subsidiaries that in the aggregate would constitute a Significant
     Subsidiary of the Company, pursuant to, or within the meaning of, any
     Bankruptcy Law, insolvency law, or other similar law now or hereafter in
     effect or otherwise, either:

               (A) commences a voluntary case,

               (B) consents to the entry of an order for relief against it in an
          involuntary case,

               (C) consents to the appointment of a Custodian of it or for all
          or substantially all of its property, or

               (D) makes a general assignment for the benefit of its creditors;
          or

          (x) a court of competent jurisdiction enters an order or decree under
     any Bankruptcy Law that:

               (A) is for relief against the Company or any of its Significant
          Subsidiaries or any group of Subsidiaries that in the aggregate would
          constitute a Significant Subsidiary of the Company in an involuntary
          case or proceeding, or adjudicates the Company or any of its
          Significant Subsidiaries or any group of Subsidiaries that in the
          aggregate would constitute a Significant Subsidiary of the Company
          insolvent or bankrupt,

               (B) appoints a Custodian of the Company or any of its Significant
          Subsidiaries or any group of Subsidiaries that in the aggregate would
          constitute a Significant Subsidiary of the Company for all or
          substantially all of the property of the Company or any such
          Significant Subsidiary or any group of Subsidiaries that in the
          aggregate would constitute a Significant Subsidiary of the Company, as
          the case may be, or


                                      -44-




               (C) orders the winding up or liquidation of the Company or any of
          its Significant Subsidiaries or any group of Subsidiaries that in the
          aggregate would constitute a Significant Subsidiary of the Company,

     and, in the case of each of the foregoing clauses (A), (B) and (C) of this
     SECTION 6.01(X), the order or decree remains unstayed and in effect for at
     least ninety (90) consecutive days.

     The term "BANKRUPTCY LAW" means Title 11, U.S. Code or any similar Federal
or State law for the relief of debtors. The term "CUSTODIAN" means any receiver,
trustee, assignee, liquidator or similar official under any Bankruptcy Law.

     A Default under CLAUSE (V) above is not an Event of Default until (I) the
Trustee notifies the Company, or the Holders of at least twenty five percent
(25%) in aggregate principal amount of the Securities then outstanding notify
the Company and the Trustee, of the Default and (II) the Default is not cured
within sixty (60) days after receipt of such notice. Such notice must specify
the Default, demand that it be remedied and state that the notice is a "NOTICE
OF DEFAULT." If the Holders of at least twenty five percent (25%) in aggregate
principal amount of the outstanding Securities request the Trustee to give such
notice on their behalf, the Trustee shall do so. When a Default is cured, it
ceases.

6.02 ACCELERATION.

     If an Event of Default (excluding an Event of Default specified in SECTION
6.01(IX) or (X) with respect to the Company (but including an Event of Default
specified in SECTION 6.01(IX) or (X) solely with respect to a Significant
Subsidiary of the Company or any group of Subsidiaries that in the aggregate
would constitute a Significant Subsidiary of the Company)) occurs and is
continuing, the Trustee by notice to the Company, or the Holders of at least
twenty five percent (25%) in aggregate principal amount of the Securities then
outstanding by notice to the Company and the Trustee, may declare the Securities
to be immediately due and payable in full. Upon such declaration, the principal
of, and any accrued and unpaid interest (including any additional interest) on,
all Securities shall be due and payable immediately. If an Event of Default
specified in SECTION 6.01(IX) or (X) with respect to the Company (excluding, for
purposes of this sentence, an Event of Default specified in SECTION 6.01(IX) or
(X) solely with respect to a Significant Subsidiary of the Company or any group
of Subsidiaries that in the aggregate would constitute a Significant Subsidiary
of the Company) occurs, the principal of, and accrued and unpaid interest
(including any additional interest) on, all the Securities shall ipso facto
become and be immediately due and payable without any declaration or other act
on the part of the Trustee or any Holder. The Holders of a majority in aggregate
principal amount of the Securities then outstanding by written notice to the
Trustee may rescind or annul an acceleration and its consequences if (A) the
rescission would not conflict with any order or decree, (B) all existing Events
of Default, except the nonpayment of principal or interest (including additional
interest) that has become due solely because of the acceleration, have been
cured or waived and (C) all amounts due to the Trustee under SECTION 7.07 have
been paid.


                                      -45-



6.03 OTHER REMEDIES.

     Notwithstanding any other provision of this Indenture, if an Event of
Default occurs and is continuing, the Trustee may pursue any available remedy by
proceeding at law or in equity to collect the payment of amounts due with
respect to the Securities or to enforce the performance of any provision of the
Securities or this Indenture.

     The Trustee may maintain a proceeding even if it does not possess any of
the Securities or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Holder in exercising any right or remedy accruing
upon an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. All remedies are cumulative.

6.04 WAIVER OF PAST DEFAULTS.

     Subject to SECTIONS 6.02, 6.07 and 9.02, the Holders of a majority in
aggregate principal amount of the Securities then outstanding may, by notice to
the Trustee, waive any past Default or Event of Default and its consequences,
other than (A) a Default or Event of Default in the payment of the principal of,
or premium, if any, or interest or additional interest on, any Security, or in
the payment of the Redemption Price, the Option Purchase Price or the Change in
Control Repurchase Price (or accrued and unpaid interest, if any, payable as
herein provided, upon Redemption, Purchase at Holder's Option or Repurchase Upon
Change in Control), (B) a Default or Event of Default arising from a failure by
the Company to convert any Securities in accordance with this Indenture or (C)
any Default or Event of Default in respect of any provision of this Indenture or
the Securities which, under SECTION 9.02, cannot be modified or amended without
the consent of the Holder of each outstanding Security affected. When a Default
or an Event of Default is waived, it is cured and ceases. This SECTION 6.04
shall be in lieu of TIA Section 316(a)(1)(B), and, as permitted by the TIA, TIA
Section 316(a)(1)(B) is hereby expressly excluded from this Indenture.

6.05 CONTROL BY MAJORITY.

     The Holders of a majority in aggregate principal amount of the Securities
then outstanding may direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee or exercising any trust or
power conferred on it. However, the Trustee may refuse to follow any direction
that conflicts with law or this Indenture, is unduly prejudicial to the rights
of other Holders or would involve the Trustee in personal liability unless the
Trustee is offered indemnity reasonably satisfactory to it; provided, that the
Trustee may take any other action deemed proper by the Trustee which is not
inconsistent with such direction. This SECTION 6.05 shall be in lieu of TIA
Section 316(a)(1)(A), and, as permitted by the TIA, TIA Section 316(a)(1)(A) is
hereby expressly excluded from this Indenture.

6.06 LIMITATION ON SUITS.

     Except as provided in SECTION 6.07, a Securityholder may not institute any
proceeding under this Indenture, or for the appointment of a receiver or a
trustee, or for any other remedy under this Indenture unless:


                                      -46-



          (i) the Holder gives to the Trustee written notice of a continuing
     Event of Default;

          (ii) the Holders of at least twenty five percent (25%) in aggregate
     principal amount of the Securities then outstanding make a written request
     to the Trustee to pursue the remedy;

          (iii) such Holder or Holders offer and, if requested, provide to the
     Trustee indemnity reasonably satisfactory to the Trustee against any loss,
     liability or expense to or of the Trustee in connection with pursuing such
     remedy;

          (iv) the Trustee does not comply with the request within sixty (60)
     days after receipt of such notice, request and offer of indemnity; and

          (v) during such sixty (60) day period, the Holders of a majority in
     aggregate principal amount of the Securities then outstanding do not give
     the Trustee a direction inconsistent with the request.

     A Securityholder may not use this Indenture to prejudice the rights of
another Securityholder or to obtain a preference or priority over another
Securityholder.

6.07 RIGHTS OF HOLDERS TO RECEIVE PAYMENT.

     Notwithstanding any other provision of this Indenture, the right of any
Holder to receive payment of all amounts due with respect to the Securities, on
or after the respective due dates as provided herein, or to bring suit for the
enforcement of any such payment on or after such respective dates, shall not be
impaired or affected without the consent of the Holder.

     Notwithstanding any other provision of this Indenture, the right of any
Holder to convert the Security in accordance with this Indenture, or to bring
suit for the enforcement of such right, shall not be impaired or affected
without the consent of the Holder.

6.08 COLLECTION SUIT BY TRUSTEE.

     If an Event of Default specified in SECTION 6.01(I) or (II) occurs and is
continuing, the Trustee may recover judgment in its own name and as trustee of
an express trust against the Company for the whole amount due with respect to
the Securities, including any unpaid and accrued interest.

6.09 TRUSTEE MAY FILE PROOFS OF CLAIM.

     The Trustee may file such proofs of claim and other papers or documents as
may be necessary or advisable in order to have the claims of the Trustee, any
predecessor Trustee and the Securityholders allowed in any judicial proceedings
relative to the Company or its creditors or properties.

     The Trustee may collect and receive any moneys or other property payable or
deliverable on any such claims and to distribute the same, and any custodian,
receiver, assignee, trustee,


                                      -47-



liquidator, sequestrator or similar official in any judicial proceeding is
hereby authorized by each Holder to make such payments to the Trustee and, in
the event that the Trustee shall consent to the making of such payments directly
to the Holders, to pay the Trustee any amount due it for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, and any other amounts due the Trustee under SECTION 7.07.

     Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights of any Holder thereof, or to authorize the Trustee to vote in
respect of the claim of any Holder in any such proceeding.

6.10 PRIORITIES.

     If the Trustee collects any money pursuant to this ARTICLE VI, it shall pay
out the money in the following order:

     First:  to the Trustee for amounts due under SECTION 7.07;

     Second: to Securityholders for all amounts due and unpaid on the
             Securities, without preference or priority of any kind, according
             to the amounts due and payable on the Securities; and

     Third:  to the Company.

     The Trustee, upon prior written notice to the Company, may fix a record
date and payment date for any payment by it to Securityholders pursuant to this
SECTION 6.10. At least fifteen (15) days before each such record date, the
Trustee shall mail to each Holder and the Company a written notice that states
such record date and payment date and the amount of such payment.

6.11 UNDERTAKING FOR COSTS.

     In any suit for the enforcement of any right or remedy under this Indenture
or in any suit against the Trustee for any action taken or omitted by it as
Trustee, a court in its discretion may require the filing by any party litigant
in the suit other than the Trustee of an undertaking to pay the costs of the
suit, and the court in its discretion may assess reasonable costs, including
reasonable attorneys' fees, against any party litigant in the suit, having due
regard to the merits and good faith of the claims or defenses made by the party
litigant. This SECTION 6.11 does not apply to a suit by the Trustee, a suit by a
Holder pursuant to SECTION 6.07 or a suit by Holders of more than ten percent
(10%) in aggregate principal amount of the outstanding Securities.

                                  VII. TRUSTEE

7.01 DUTIES OF TRUSTEE.

     (A) If an Event of Default has occurred and is continuing, the Trustee
shall exercise such of the rights and powers vested in it by this Indenture, and
use the same degree of care and


                                      -48-



skill in their exercise, as a prudent person would exercise or use under the
circumstances in the conduct of his or her own affairs.

     (B) Except during the continuance of an Event of Default:

          (i) the Trustee need perform only those duties that are specifically
     set forth in this Indenture and no implied covenants or obligations shall
     be read into this Indenture against the Trustee; and

          (ii) in the absence of bad faith, willful misconduct or negligence on
     its part, the Trustee may conclusively rely, as to the truth of the
     statements and the correctness of the opinions expressed therein, upon
     certificates or opinions furnished to the Trustee and conforming to the
     requirements of this Indenture; but in the case of any such certificates or
     opinions which by any provision hereof are specifically required to be
     furnished to the Trustee, the Trustee shall examine the certificates and
     opinions to determine whether or not they conform to the requirements of
     this Indenture (but need not confirm or investigate the accuracy of
     mathematical calculations or other facts stated therein).

     (C) The Trustee may not be relieved from liability for its own negligent
action, its own negligent failure to act or its own willful misconduct, except
that:

          (i) the Trustee shall not be liable for any error of judgment made in
     good faith by a Responsible Officer, unless it is proved that the Trustee
     was negligent in ascertaining the pertinent facts; and

          (ii) the Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to SECTION 6.05.

     (D) Every provision of this Indenture that in any way relates to the
Trustee is subject to the provisions of this SECTION 7.01.

     (E) The Trustee shall not be liable for interest on any money received by
it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law.

7.02 RIGHTS OF TRUSTEE.

     (A) Subject to SECTION 7.01, the Trustee may conclusively rely on any
document believed by it to be genuine and to have been signed or presented by
the proper person. The Trustee need not investigate any fact or matter stated in
the document; if, however, the Trustee shall determine to make such further
inquiry or investigation, it shall be entitled during normal business hours to
examine the relevant books, records and premises of the Company, personally or
by agent or attorney upon reasonable prior notice.


                                      -49-



     (B) Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate and/or an Opinion of Counsel. The Trustee shall not be
liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel.

     (C) Any request or direction of the Company mentioned herein shall be
sufficiently evidenced by a Company Request or Company Order, and any resolution
of the Board of Directors shall be sufficiently evidenced by a Board Resolution.

     (D) The Trustee may consult with counsel (such counsel to be reasonably
acceptable to the Company), and the advice of such counsel or any Opinion of
Counsel shall be full and complete authorization and protection in respect of
any action taken, suffered or omitted by it hereunder in good faith and in
reliance thereon.

     (E) The Trustee may act through agents or attorneys and shall not be
responsible for the misconduct or negligence of any agent or attorney appointed
with due care.

     (F) The Trustee shall not be liable for any action it takes or omits to
take in good faith which it believes to be authorized or within its discretion,
rights or powers conferred upon it by this Indenture.

     (G) Except with respect to SECTION 6.01, the Trustee shall have no duty to
inquire as to the performance of the Company with respect to the covenants
contained in ARTICLE IV. In addition, the Trustee shall not be deemed to have
knowledge of an Event of Default except (i) any Default or Event of Default
occurring pursuant to SECTIONS 6.01(I) or (II) or (ii) any Default or Event of
Default of which a Responsible Officer of the Trustee shall have received
written notification or obtained actual knowledge. Delivery of reports,
information and documents to the Trustee under ARTICLE IV (other than SECTIONS
4.04 and 4.07) is for informational purposes only and the Trustee's receipt of
the foregoing shall not constitute constructive notice of any information
contained therein or determinable from information contained therein, including
the Company's compliance with any of its covenants hereunder (as to which the
Trustee is entitled to rely on Officers' Certificates).

     (H) Subject to Section 7.01(A), the Trustee shall be under no obligation to
exercise any of the rights or powers vested by this Indenture at the request or
direction of any of the Holders pursuant to this Indenture unless such Holders
shall have offered to the Trustee security or indemnity reasonably satisfactory
to the Trustee against the costs, expenses and liabilities which might be
incurred by it in compliance with such request or direction.

     (I) The rights, privileges, protections, immunities and benefits given to
the Trustee, including without limitation, its right to be indemnified, are
extended to, and shall be enforceable by, the Trustee in each of its capacities
hereunder, and each agent, custodian and other Person employed to act hereunder.

     (J) The Trustee may request that the Company deliver an Officers'
Certificate setting forth the names of individuals and/or titles of officers
authorized at such time to take specified actions pursuant to this Indenture,
which Officers' Certificate may be signed by any person authorized to sign an
Officers' Certificate, including any person specified as so authorized in any
such certificate previously delivered and not superseded.


                                      -50-



     (K) The permissive rights of the Trustee enumerated herein shall not be
construed as duties.

7.03 INDIVIDUAL RIGHTS OF TRUSTEE.

     The Trustee in its individual or any other capacity may become the owner or
pledgee of Securities and may otherwise deal with the Company or any of its
Affiliates with the same rights the Trustee would have if it were not Trustee.
Any Securities Agent may do the same with like rights. The Trustee, however,
must comply with SECTIONS 7.10 and 7.11.

7.04 TRUSTEE'S DISCLAIMER.

     The Trustee makes no representation as to the validity or adequacy of this
Indenture or the Securities; the Trustee shall not be accountable for the
Company's use of the proceeds from the Securities; and the Trustee shall not be
responsible for any statement in the Securities other than its certificate of
authentication.

7.05 NOTICE OF DEFAULTS.

     If a Default or Event of Default occurs and is continuing as to which the
Trustee has received notice pursuant to the provisions of this Indenture, or as
to which a Responsible Officer of the Trustee shall have actual knowledge, then
the Trustee shall mail to each Holder a notice of the Default or Event of
Default within thirty (30) days after it occurs unless such Default or Event of
Default has been cured or waived; provided, however, that, except in the case of
a Default or Event of Default in payment of any amounts due with respect to any
Security, the Trustee may withhold such notice if, and so long as it in good
faith determines that, withholding such notice is in the best interests of
Holders.

7.06 REPORTS BY TRUSTEE TO HOLDERS.

     Within sixty (60) days after each May 15, beginning with May 15, 2007, the
Trustee shall mail to each Securityholder if required by TIA Section 313(a) a
brief report dated as of such May 15 that complies with TIA Section 313(c). In
such event, the Trustee also shall comply with TIA Section 313(b).

     A copy of each report at the time of its mailing to Securityholders shall
be mailed by first class mail to the Company and filed by the Trustee with the
SEC and each stock exchange, if any, on which the Securities are listed. The
Company shall promptly notify the Trustee of the listing or delisting of the
Securities on or from any stock exchange.

7.07 COMPENSATION AND INDEMNITY.

     The Company shall pay to the Trustee from time to time such compensation
for its services as shall be agreed upon in writing. The Trustee's compensation
shall not be limited by any law on compensation of a trustee of an express
trust. The Company shall reimburse the Trustee upon request for all reasonable
out-of-pocket expenses incurred by it. Such expenses shall include the
reasonable compensation and out-of-pocket expenses of the Trustee's agents and
counsel.


                                      -51-



     The Company shall indemnify the Trustee against any and all loss,
liability, damage, claim or expense (including the reasonable fees and expenses
of counsel and taxes other than those based upon the income of the Trustee)
incurred by it in connection with the acceptance or administration of this trust
and the performance of its duties hereunder, including the reasonable costs and
expenses of defending itself against any claim (whether asserted by the Company,
any Holder or any other Person) or liability in connection with the exercise or
performance of any of its powers and duties hereunder. The Company need not pay
for any settlement made without its consent. The Trustee shall notify the
Company promptly of any claim for which it may seek indemnification. The Company
need not reimburse any expense or indemnify against any loss or liability
incurred by the Trustee through the Trustee's negligence, bad faith or willful
misconduct.

     To secure the Company's payment obligations in this SECTION 7.07, the
Trustee shall have a lien prior to the Securities on all money or property held
or collected by the Trustee, except that held in trust to pay amounts due on
particular Securities.

     The obligations of the Company with respect to the Trustee provided for in
this SECTION 7.07 shall survive the termination and discharge of this Indenture
and any resignation or removal of the Trustee.

     When the Trustee incurs expenses or renders services after an Event of
Default specified in SECTION 6.01(IX) or (X) occurs, the expenses and the
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.

7.08 REPLACEMENT OF TRUSTEE.

     A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this SECTION 7.08.

     The Trustee may resign by so notifying the Company in writing thirty (30)
Business Days prior to such resignation. The Holders of a majority in aggregate
principal amount of the Securities then outstanding may remove the Trustee by so
notifying the Trustee and the Company in writing and may appoint a successor
Trustee with the Company's consent. The Company may remove the Trustee if:

          (i) the Trustee fails to comply with SECTION 7.10;

          (ii) the Trustee is adjudged a bankrupt or an insolvent;

          (iii) a receiver or other public officer takes charge of the Trustee
     or its property; or

          (iv) the Trustee becomes incapable of acting.

     If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company shall promptly appoint a successor
Trustee.


                                      -52-



     If a successor Trustee does not take office within thirty (30) days after
the retiring Trustee resigns or is removed, the retiring Trustee (at the
Company's expense), the Company or the Holders of at least ten percent (10%) in
aggregate principal amount of the outstanding Securities may petition any court
of competent jurisdiction for the appointment of a successor Trustee.

     If the Trustee fails to comply with SECTION 7.10, any Holder may petition
any court of competent jurisdiction for the removal of the Trustee and the
appointment of a successor Trustee.

     A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company. Thereupon the resignation or removal
of the retiring Trustee shall become effective, and the successor Trustee shall
have all the rights, powers and duties of the Trustee under this Indenture. The
successor Trustee shall mail a notice of its succession to Securityholders. The
retiring Trustee shall promptly transfer all property held by it as Trustee to
the successor Trustee, subject to the lien provided for in SECTION 7.07.

7.09 SUCCESSOR TRUSTEE BY MERGER, ETC.

     If the Trustee consolidates with, merges or converts into, or transfers all
or substantially all of its corporate trust business to, another corporation,
the successor corporation without any further act shall be the successor
Trustee, if such successor corporation is otherwise eligible hereunder.

7.10 ELIGIBILITY; DISQUALIFICATION.

     There shall at all times be a Trustee hereunder that is a corporation
organized and doing business under the laws of the United States of America or
of any state thereof, which Trustee (A) is authorized under such laws to
exercise corporate trustee power, (B) is subject to supervision or examination
by federal or state authorities and (C) has a combined capital and surplus of at
least $50 million as set forth in its most recent published annual report of
condition. The Trustee shall comply with TIA Section 310(b). Nothing in this
Indenture shall prevent the Trustee from filing with the SEC the application
referred to in the penultimate paragraph of TIA Section 310(b).

7.11 PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

     The Trustee shall comply with TIA Section 311(a), excluding any creditor
relationship listed in TIA Section 311(b). A Trustee who has resigned or been
removed shall be subject to TIA Section 311(a) to the extent indicated.

                          VIII. DISCHARGE OF INDENTURE

8.01 TERMINATION OF THE OBLIGATIONS OF THE COMPANY.

     This Indenture shall cease to be of further effect if (a) either (i) all
outstanding Securities (other than Securities replaced pursuant to SECTION 2.07
hereof) have been delivered to the Trustee for cancellation or (ii) all
outstanding Securities have become due and payable at their


                                      -53-



scheduled maturity or upon Purchase at Holder's Option, Redemption or Repurchase
Upon Change in Control, and in either case the Company irrevocably deposits,
prior to the applicable due date, with the Trustee or the Paying Agent (if the
Paying Agent is not the Company or any of its Affiliates) cash sufficient to pay
all amounts due and owing on all outstanding Securities (other than Securities
replaced pursuant to SECTION 2.07 hereof) on the Maturity Date or an Option
Purchase Date, Redemption Date, Tax Redemption Date or Change in Control
Repurchase Date, as the case may be; (b) the Company pays to the Trustee all
other sums payable hereunder by the Company; (c) no Default or Event of Default
with respect to the Securities shall exist on the date of such deposit; (d) such
deposit will not result in a breach or violation of, or constitute a Default or
Event of Default under, this Indenture or any other agreement or instrument to
which the Company is a party or by which it is bound; and (e) the Company has
delivered to the Trustee an Officers' Certificate and an Opinion of Counsel,
each stating that all conditions precedent provided for herein relating to the
satisfaction and discharge of this Indenture have been complied with; provided,
however, that SECTIONS 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 2.15, 2.16,
2.17, 3.05, 3.08, 3.09, 4.01, 4.02, 4.05, 7.07 and 7.08 and ARTICLES VIII and X
shall survive any discharge of this Indenture until such time as the Securities
have been paid in full and there are no Securities outstanding.

8.02 APPLICATION OF TRUST MONEY.

     The Trustee shall hold in trust all money and other consideration deposited
with it pursuant to SECTION 8.01 and shall apply such deposited money and other
consideration through the Paying Agent and in accordance with this Indenture to
the payment of amounts due on the Securities.

8.03 REPAYMENT TO COMPANY.

     The Trustee and the Paying Agent shall promptly notify the Company of, and
pay to the Company upon the request of the Company, any excess money held by
them at any time. The Trustee and the Paying Agent shall pay to the Company upon
the written request of the Company any money held by them for the payment of the
principal of, premium, if any, or any accrued and unpaid interest or additional
interest on, the notes that remains unclaimed for two (2) years; provided,
however, that the Trustee or such Paying Agent, before being required to make
any such repayment, may, at the expense of the Company, cause to be published
once in a newspaper of general circulation in the City of New York or cause to
be mailed to each Holder, notice stating that such money remains unclaimed and
that, after a date specified therein, which shall not be less than thirty (30)
days from the date of such publication or mailing, any unclaimed balance of such
money then remaining will be repaid to the Company. After payment to the
Company, Securityholders entitled to the money must look to the Company for
payment as general creditors, subject to applicable law, and all liability of
the Trustee and the Paying Agent with respect to such money and payment shall,
subject to applicable law, cease.

8.04 REINSTATEMENT.

     If the Trustee or Paying Agent is unable to apply any money or other
consideration in accordance with SECTIONS 8.01 and 8.02 by reason of any legal
proceeding or by reason of any order or judgment of any court or governmental
authority enjoining, restraining or otherwise


                                      -54-



prohibiting such application, the obligations of the Company under this
Indenture and the Securities shall be revived and reinstated as though no
deposit had occurred pursuant to SECTIONS 8.01 and 8.02 until such time as the
Trustee or Paying Agent is permitted to apply all such money or other
consideration in accordance with SECTIONS 8.01 and 8.02; provided, however, that
if the Company has made any payment of amounts due with respect to any
Securities because of the reinstatement of its obligations, then the Company
shall be subrogated to the rights of the Holders of such Securities to receive
such payment from the money held by the Trustee or Paying Agent.

                                 IX. AMENDMENTS

9.01 WITHOUT CONSENT OF HOLDERS.

     The Company, with the consent of the Trustee, may amend or supplement this
Indenture or the Securities without notice to or the consent of any
Securityholder:

          (i) to comply with SECTIONS 5.01 and 10.11;

          (ii) to make any changes or modifications to this Indenture necessary
     in connection with the registration of the public offer and sale of the
     Securities under the Securities Act pursuant to the Registration Rights
     Agreement or the qualification of this Indenture under the TIA;

          (iii) to secure the obligations of the Company in respect of the
     Securities;

          (iv) to add to the covenants of the Company described in this
     Indenture for the benefit of Securityholders or to surrender any right or
     power conferred upon the Company; and

          (v) to make provisions with respect to adjustments to the Conversion
     Rate as required by this Indenture or to increase the Conversion Rate in
     accordance with this Indenture.

     In addition, the Company and the Trustee may enter into a supplemental
indenture without the consent of Holders of the Securities to cure any
ambiguity, defect, omission or inconsistency in this Indenture in a manner that
does not, individually or in the aggregate with all other modifications made or
to be made to the Indenture, adversely affect the rights of any Holder.

9.02 WITH CONSENT OF HOLDERS.

     The Company, with the consent of the Trustee, may amend or supplement this
Indenture or the Securities without notice to any Securityholder but with the
written consent of the Holders of at least a majority in aggregate principal
amount of the outstanding Securities. Subject to SECTIONS 6.04 AND 6.07, the
Holders of a majority in aggregate principal amount of the outstanding
Securities may, by notice to the Trustee, waive compliance by the Company with
any provision of this Indenture or the Securities without notice to any other
Securityholder.


                                      -55-



Notwithstanding anything herein to the contrary, without the consent of each
Holder of each outstanding Security affected, an amendment, supplement or
waiver, including a waiver pursuant to SECTION 6.04, may not:

               (a) change the stated maturity of the principal of, or the
          payment date of any installment of interest or additional interest on,
          any Security;

               (b) reduce the principal amount of, or any premium, interest or
          additional interest on, any Security;

               (c) change the place, manner or currency of payment of principal
          of, or any premium, interest or additional interest on, any Security;

               (d) impair the right to institute suit for the enforcement of any
          payment on, or with respect to, or of the conversion of, any Security;

               (e) modify, in a manner adverse to Holders, the provisions with
          respect to the right of Holders pursuant to ARTICLE III to require the
          Company to purchase Securities on an Option Purchase Date or to
          repurchase Securities upon the occurrence of a Change in Control;

               (f) modify the provisions of SECTION 2.18 in a manner adverse to
          Holders;

               (g) adversely affect the right of Holders to convert Securities
          in accordance with ARTICLE X;

               (h) reduce the percentage of the aggregate principal amount of
          the outstanding Securities whose Holders must consent to a
          modification to or amendment of any provision of this Indenture or the
          Securities;

               (i) reduce the percentage of the aggregate principal amount of
          the outstanding Securities whose Holders must consent to a waiver of
          compliance with any provision of this Indenture or the Securities or a
          waiver of any Default or Event of Default; or

               (j) modify the provisions of this Indenture with respect to
          modification and waiver (including waiver of a Default or an Event of
          Default), except to increase the percentage required for modification
          or waiver or to provide for the consent of each affected Holder.

     Promptly after an amendment, supplement or waiver under SECTION 9.01 or
this SECTION 9.02 becomes effective, the Company shall mail, or cause to be
mailed, to Securityholders a notice briefly describing such amendment,
supplement or waiver. Any failure of the Company to mail such notice shall not
in any way impair or affect the validity of such amendment, supplement or
waiver.


                                      -56-



     It shall not be necessary for the consent of the Holders under this SECTION
9.02 to approve the particular form of any proposed amendment, supplement or
waiver, but it shall be sufficient if such consent approves the substance
thereof.

9.03 COMPLIANCE WITH TRUST INDENTURE ACT.

     Every amendment, waiver or supplement to this Indenture or the Securities
shall comply with the TIA as then in effect.

9.04 REVOCATION AND EFFECT OF CONSENTS.

     Until an amendment, supplement or waiver becomes effective, a consent to it
by a Holder is a continuing consent by the Holder and every subsequent Holder of
a Security or portion of a Security that evidences the same debt as the
consenting Holder's Security, even if notation of the consent is not made on any
Security. However, any such Holder or subsequent Holder may revoke the consent
as to its Security or portion of a Security if the Trustee receives the notice
of revocation before the date the amendment, supplement or waiver becomes
effective. An amendment, supplement or waiver becomes effective in accordance
with its terms and thereafter binds every Holder.

     After an amendment, supplement or waiver becomes effective with respect to
the Securities, it shall bind every Holder unless such amendment, supplement or
waiver makes a change that requires, pursuant to SECTION 9.02, the consent of
each Holder affected. In that case, the amendment, supplement or waiver shall
bind each Holder of a Security who has consented to it and, provided that notice
of such amendment, supplement or waiver is reflected on a Security that
evidences the same debt as the consenting Holder's Security, every subsequent
Holder of a Security or portion of a Security that evidences the same debt as
the consenting Holder's Security.

9.05 NOTATION ON OR EXCHANGE OF SECURITIES.

     If an amendment, supplement or waiver changes the terms of a Security, the
Trustee may require the Holder of the Security to deliver it to the Trustee. The
Trustee may place an appropriate notation on the Security as directed and
prepared by the Company about the changed terms and return it to the Holder.
Alternatively, if the Company so determines, the Company in exchange for the
Security shall issue and the Trustee shall authenticate a new Security that
reflects the changed terms.

9.06 TRUSTEE PROTECTED.

     The Trustee shall sign any amendment, supplemental indenture or waiver
authorized pursuant to this ARTICLE IX; provided, however, that the Trustee need
not sign any amendment, supplement or waiver authorized pursuant to this ARTICLE
IX that adversely affects the Trustee's rights, duties, liabilities or
immunities. The Trustee shall be entitled to receive and conclusively rely upon,
in addition to the documents required by SECTION 11.04, an Opinion of Counsel as
to legal matters and an Officers' Certificate as to factual matters that any
supplemental indenture, amendment or waiver is permitted or authorized pursuant
to this Indenture.


                                      -57-



                                  X. CONVERSION

10.01 CONVERSION PRIVILEGE; RESTRICTIVE LEGENDS.

     (A) Subject to the provisions of ARTICLE III, the Securities shall be
convertible into Common Shares or, at the Company's election in accordance
herewith, cash or a combination of cash and Common Shares, in each case in
accordance with this ARTICLE X and as set forth below if any of the following
conditions are satisfied:

          (i) Conversion Based on Closing Sale Price of Common Shares. The
     Securities may be surrendered for conversion on any Business Day of a
     calendar quarter after the calendar quarter ending December 31, 2006, if
     the Closing Sale Price for each of twenty (20) or more Trading Days in a
     period of thirty (30) consecutive Trading Days ending on the last Trading
     Day of the immediately preceding calendar quarter exceeds one hundred and
     twenty percent (120%) of the Conversion Price in effect on the last Trading
     Day of the immediately preceding calendar quarter. Solely for purposes of
     determining whether the Securities shall have become convertible pursuant
     to this SECTION 10.01(A)(I), the Board of Directors shall, in its good
     faith determination, which shall be described in a Board Resolution, make
     appropriate adjustments to the Closing Sale Prices and/or such Conversion
     Price used to determine whether the Securities shall have become
     convertible pursuant to this SECTION 10.01(A)(I) to account for any
     adjustments to the Conversion Rate which shall have become effective, or
     any event requiring an adjustment to the Conversion Rate where the Ex Date
     of such event occurs, during the period of thirty (30) consecutive Trading
     Days ending on the last Trading Day of the immediately preceding calendar
     quarter.

          (ii) Conversion Upon Satisfaction of Trading Price Condition. The
     Securities may be surrendered for conversion during the five (5)
     consecutive Business Days immediately after any five (5) consecutive
     Trading Day period (such five (5) consecutive Trading Day period, the "NOTE
     MEASUREMENT PERIOD") in which the average Trading Price per $1,000
     principal amount of the Securities was equal to or less than ninety seven
     percent (97%) of the average Conversion Value per $1,000 principal amount
     of Securities (as defined below) during the Note Measurement Period (such
     condition, the "TRADING PRICE CONDITION"). The Bid Solicitation Agent shall
     not have any obligation to determine the Trading Price unless the Company
     has requested such determination, and the Company shall have no obligation
     to make such request unless a Holder provides the Company with reasonable
     evidence that the Trading Price per $1,000 principal amount of the
     Securities would be equal to or less than ninety seven percent (97%) of the
     product of the Closing Sale Price and the Conversion Rate. Upon receipt of
     such evidence, the Company shall instruct the Bid Solicitation Agent to
     determine the Trading Price per $1,000 principal amount of the Securities
     for each of the five (5) successive Trading Days immediately after the
     Company receives such evidence and on each Trading Day thereafter until the
     first Trading Day on which the Trading Price Condition is no longer
     satisfied. For purposes of this paragraph, the "CONVERSION VALUE" per
     $1,000 principal amount of Securities, on a given Trading Day, means the
     product of the Closing Sale Price on such Trading Day and the Conversion
     Rate in effect on such Trading Day.


                                      -58-



          (iii) Conversion Based on Redemption. A Security, or portion of a
     Security, which has been called for Redemption or Tax Redemption may be
     surrendered for conversion; provided, however, that such Security or
     portion thereof may be surrendered for conversion pursuant to this
     paragraph only until the close of business on the Business Day immediately
     preceding the Redemption Date or the Tax Redemption Date, as applicable.

          (iv) Conversion Upon Certain Distributions. If the Company takes any
     action, or becomes aware of any event, that would require an adjustment to
     the Conversion Rate pursuant to SECTIONS 10.05(B), 10.05(C), 10.05(D) or
     10.05(E), the Securities may be surrendered for conversion beginning on the
     date the Company mails the notice to the Holders as provided in SECTION
     10.10 (or, if earlier, the date the Company is required to mail such
     notice) and at any time thereafter until the close of business on the
     Business Day immediately preceding the Ex Date (as defined in SECTION
     10.05(G)) of the applicable transaction or until the Company announces that
     such transaction will not take place.

          (v) Conversion Upon Occurrence of Certain Corporate Transactions. If
     either:

               (a) a Fundamental Change or a Make-Whole Fundamental Change
          occurs; or

               (b) the Company is a party to a consolidation, amalgamation,
          statutory arrangement, merger or binding share exchange pursuant to
          which the Common Shares would be converted into or exchanged for, or
          would constitute solely the right to receive, cash, other securities
          or other property,

     then, in each case, the Securities may be surrendered for conversion at any
     time during the period that begins on, and includes, the date that is
     thirty (30) calendar days prior to the date originally announced by the
     Company as the anticipated effective date of such transaction (which
     anticipated effective date the Company shall disclose, in good faith, in
     the written notice, public announcement and publication referred to in
     SECTION 10.01(D)) and ends on, and includes, the date that is thirty (30)
     calendar days after the actual effective date of such transaction;
     provided, however, that if such transaction is a Make-Whole Fundamental
     Change, then the Securities may also be surrendered for conversion at any
     time during the Make-Whole Conversion Period applicable to such Make-Whole
     Fundamental Change; provided, further, that if such transaction is a Change
     in Control, then the Securities may also be surrendered for conversion at
     any time until, and including, the Change in Control Repurchase Date
     applicable to such Change in Control.

          (vi) Conversion during specified periods. The Securities may be
     surrendered for conversion at any time from, and including, October 15,
     2009 to, and including November 15, 2009, and at any time from, and
     including, October 15, 2011 to, and including, November 15, 2011 and at any
     time on or after November 15, 2021.


                                      -59-



     (B) Notwithstanding anything herein to the contrary, the right to convert
the Securities pursuant to this ARTICLE X shall terminate at the close of
business on the Business Day immediately preceding the Maturity Date.

     (C) The initial Conversion Rate shall be 50.7181 Common Shares per $1,000
principal amount of Securities. The Conversion Rate shall be subject to
adjustment in accordance with SECTIONS 10.05 through 10.14.

     (D) Whenever any event described in SECTION 10.01 shall occur which shall
cause the Securities to become convertible as provided in this ARTICLE X, the
Company shall promptly deliver, in accordance with SECTION 11.02, written notice
of the convertibility of the Securities to the Trustee and each Holder and
shall, as soon practicable, but in no event later than the open of business on
the first date the Securities shall become convertible as provided in this
ARTICLE X as a result of such event, publicly announce, through a reputable
national newswire service, and publish on the Company's website, that the
Securities have become convertible. Such written notice, public announcement and
publication shall include:

          (i) a description of such event;

          (ii) a description of the periods during which the Securities shall be
     convertible as provided in this ARTICLE X as a result of such event;

          (iii) the anticipated effective date of such event, if applicable; and

          (iv) the procedures Holders must follow to convert their notes in
     accordance with this ARTICLE X, including the name and address of the
     Conversion Agent.

          If the Company shall fail to make such public announcement on or
before the open of business on the first date the Securities shall become
convertible as provided in this ARTICLE X as a result of such event, then (1)
the Securities shall remain convertible for an additional Business Day for each
Business Day, on or after such first date the Securities become convertible,
that the Company shall fail to make such public announcement (an "EXTENSION
PERIOD"); and (2) if the event causing the Securities to become convertible
shall be a Make-Whole Fundamental Change, then the increased Conversion Rate
applicable, pursuant to SECTION 10.14, to Securities surrendered within the time
periods specified in SECTION 10.14 shall continue to apply to Securities
surrendered for conversion during any such Extension Period.

     (E) A Holder may convert a portion of the principal amount of a Security if
such portion is $1,000 principal amount or an integral multiple of $1,000
principal amount. Provisions of this Indenture that apply to conversion of all
of a Security also apply to conversion of a portion of such Security.

     (F) Any Common Shares that are issued upon conversion of a Security that
bear the Private Placement Legend shall bear the Private Placement Legend until
the earlier of the second anniversary of the later of the Issue Date and the
last date on which the Company or any Affiliate was the owner of such shares or
the Security (or any predecessor security) from which such shares were converted
(or such shorter period of time as permitted by Rule 144(k) under the


                                      -60-



Securities Act or any successor provision thereunder) (or such longer period of
time as may be required under the Securities Act or applicable state securities
laws, as set forth in an Opinion of Counsel, unless otherwise agreed by the
Company and the Holder thereof) (or, if earlier, the date such Common Shares are
sold pursuant to Rule 144, Regulation S or an effective registration statement
under the Securities Act). Any Common Shares that are issued upon conversion of
a Security that bears the Canadian Private Placement Legend shall bear the
Canadian Private Placement Legend until the earlier of (1) the date that is four
(4) months and one (1) day from the date of the issuance of such Security; (2)
the date on which a prospectus has been filed with the appropriate Canadian
securities commissions qualifying such Common Shares in Canada; and (3) the date
on which such Common Shares are sold pursuant to an effective registration
statement under the Securities Act.

10.02 CONVERSION PROCEDURE AND PAYMENT UPON CONVERSION.

     (A) To convert a Security, a Holder must satisfy the requirements of
PARAGRAPH 11 of the Securities. The date on which the Holder satisfies all those
requirements is herein referred to as the "CONVERSION DATE."

     (B) If the Conversion Date with respect to a Security tendered for
conversion is on or before the Net Share Settlement Election Date and on or
before the Final Notice Date applicable to such Security, then:

          (i) in the event the Company desires to elect, in accordance herewith,
     to pay part or all of the Conversion Consideration (excluding any cash due
     in respect of a fractional Common Share) due with respect to such
     conversion in cash, then:

               (a) the Company shall, on or before the second (2nd) Business Day
          (the "CASH SETTLEMENT NOTICE DEADLINE DATE") after such Conversion
          Date, notify the Conversion Agent in writing (a "CASH ELECTION
          NOTICE"), and the Conversion Agent shall notify the Holder of such
          Security upon such Holder's request, the dollar amount of the
          Conversion Consideration due with respect to such conversion that the
          Company elects to pay in cash (which amount shall be expressed as
          either 100% of such Conversion Consideration or a fixed dollar amount
          (the "CASH AMOUNT"), which shall not be equal to or less than zero
          (0), per $1,000 principal amount); once the Cash Election Notice is
          made with respect to the conversion of such Security, it shall be
          irrevocable as to such conversion;

               (b) such Holder may retract such conversion by delivering to the
          Conversion Agent, at any time on or before the second (2nd) Business
          Day (the "CONVERSION RETRACTION DEADLINE DATE") following such Cash
          Settlement Notice Deadline Date, a written notice of retraction (which
          shall be in a form that is reasonably acceptable to the Conversion
          Agent), in which event the Conversion Agent shall return such Security
          to such Holder and the Conversion Notice with respect to such
          conversion shall be null and void;

               (c) if such Holder shall not have retracted such conversion in
          accordance with SECTION 10.02(B)(I)(B), then the Company shall,
          subject to


                                      -61-



          SECTION 10.02(F), deliver the following to such Holder, through the
          Conversion Agent, no later than the third (3rd) Business Day
          immediately following the last day of the Cash Settlement Averaging
          Period applicable to such conversion:

                    (1) in the event that such Cash Election Notice shall have
               indicated that the Company shall pay 100% of the Conversion
               Consideration due with respect to such conversion in cash, an
               amount in cash equal to the product of (1) the Conversion Rate in
               effect at the close of business on the last Trading Day in such
               Cash Settlement Averaging Period; and (2) the arithmetic average
               of the Applicable Cash Settlement Share Prices on each Trading
               Day in such Cash Settlement Averaging Period; or

                    (2) otherwise, (1) an amount in cash equal to the product of
               the Cash Amount and a fraction whose numerator is the principal
               amount of such Security subject to conversion and whose
               denominator is one thousand dollars ($1,000); and (2) a number of
               Common Shares, which shall not be less than zero (0), equal to
               the product of (I) a fraction whose numerator is the principal
               amount of such Security subject to conversion and whose
               denominator is one thousand dollars ($1,000) and (II) excess of
               (A) the Conversion Rate in effect at the close of business on the
               last Trading Day in such Cash Settlement Averaging Period over
               (B) a fraction whose numerator is such Cash Amount and whose
               denominator is the arithmetic average of the Applicable Cash
               Settlement Share Prices on each Trading Day in such Cash
               Settlement Averaging Period; provided, however, that the Company
               shall not issue fractional Common Shares and shall instead
               deliver cash (in addition to any other consideration payable upon
               such conversion) in an amount equal to the value of such fraction
               computed on the basis of the Volume-Weighted Average Price per
               Common Share on the Trading Day immediately before such
               Conversion Date;

          provided, however, in the event any Make-Whole Consideration is
          payable pursuant to SECTION 10.14, the Company shall, in addition to
          delivering the consideration specified above, deliver such Make-Whole
          Consideration within the time period specified in, and in accordance
          with, SECTION 10.14.

          (ii) in the event the Company shall not have timely delivered to the
     Conversion Agent a Cash Election Notice in accordance with SECTION
     10.02(B)(I)(A) or such Cash Election Notice indicates that the Company will
     solely deliver Common Shares upon such conversion, then the Company shall
     deliver, to such Holder, through the Conversion Agent, no later than the
     third (3rd) Business Day immediately following such Conversion Date, a
     number of Common Shares equal to the product of the Conversion Rate in
     effect at the close of business on such Conversion Date multiplied by a
     fraction whose numerator is the principal amount of such Security subject
     to such conversion and whose denominator is one thousand dollars ($1,000);
     provided, however, that the Company shall not issue fractional Common
     Shares and


                                      -62-


     shall instead deliver cash (in addition to any other consideration payable
     upon such conversion) in an amount equal to the value of such fraction
     computed on the basis of the Volume-Weighted Average Price per Common Share
     on the Trading Day immediately before such Conversion Date.

     If Common Shares shall be due pursuant to SECTION 10.02(B)(I)(C)(2) in
     respect of a Security tendered for conversion, then the person in whose
     name any certificate representing such Common Shares is to be registered
     shall be treated as a shareholder of record of the Company as of the close
     of business on the last Trading Day in the Cash Settlement Averaging Period
     applicable to such conversion. If Common Shares shall be due pursuant to
     SECTION 10.02(B)(II) in respect of a Security tendered for conversion, then
     the person in whose name any certificate representing such Common Shares is
     to be registered shall be treated as a shareholder of record of the Company
     as of the close of business on the Conversion Date with respect to such
     conversion.

     "CONVERSION CONSIDERATION" shall mean, with respect to a Security tendered
     for conversion, the consideration deliverable hereunder in respect of such
     conversion, including, if applicable, any Make-Whole Consideration.

     "CASH SETTLEMENT AVERAGING PERIOD" shall mean, with respect to a Security
     tendered for conversion, either (i) in the event the Conversion Date with
     respect to such conversion is on or before the Net Share Settlement
     Election Date and on or before the Final Notice Date with respect to such
     Security and the Company shall have timely delivered to the Conversion
     Agent a Cash Election Notice in accordance with SECTION 10.02(B)(I)(A), the
     twenty (20) consecutive Trading Days beginning on, and including, the
     Trading Day immediately following the Conversion Retraction Deadline Date;
     or (ii) in the event the Conversion Date with respect to such conversion is
     on or before the Net Share Settlement Election Date and after the Final
     Notice Date with respect to such Security and the Company shall have timely
     made a Cash Election Notice in accordance with SECTION 10.02(C)(I), the
     twenty (20) consecutive Trading Days beginning on, and including, the
     Trading Day immediately following such Conversion Date; or (iii) in the
     event the Conversion Date with respect to such conversion is after the Net
     Share Settlement Election Date, the twenty (20) consecutive Trading Days
     beginning on, and including, the Trading Day immediately following the
     Conversion Date applicable to such conversion.

     "APPLICABLE CASH SETTLEMENT SHARE PRICE" shall mean, with respect to a
     Trading Day in the applicable Cash Settlement Averaging Period, the
     Volume-Weighted Average Price per Common Share on such Trading Day;
     provided, however, that the Board of Directors shall, in its good faith
     determination, which shall be described in a Board Resolution, make
     appropriate adjustments to such Applicable Cash Settlement Share Price to
     account for any adjustments to the Conversion Rate which shall have become
     effective, or any event requiring an adjustment to the Conversion Rate
     where the Ex Date of such event occurs, during such Cash Settlement
     Averaging Period.

     "VOLUME-WEIGHTED AVERAGE PRICE" per Common Share on any Trading Day shall
     mean the volume-weighted average price per Common Share (expressed in U.S.
     dollars) on the NASDAQ Global Market or, if the Common Shares shall not be
     listed on the NASDAQ


                                      -63-



     Global Market, on the principal U.S. exchange or U.S. over-the-counter
     market on which the Common Shares shall then be listed or traded, in each
     case as displayed by Bloomberg (or any successor service) in respect of the
     period from 9:30 a.m. to 4:00 p.m. (New York City time) on such Trading
     Day; provided, however, that if such volume-weighted average price shall
     not be available, then the Volume-Weighted Average Price per Common Share
     for purposes hereof shall be determined by a nationally recognized
     investment banking firm retained by the Company for such purpose.

     "FINAL NOTICE DATE" shall mean, with respect to a security, either (1) if
     such security is to be redeemed pursuant to a Redemption or Tax Redemption,
     the twentieth (20th) day before the applicable Redemption Date or Tax
     Redemption Date, as applicable, or (2) otherwise, the twentieth (20th) day
     before the Maturity Date.

     (C) If the Conversion Date with respect to a Security tendered for
conversion is on or before the Net Share Settlement Election Date and after the
Final Notice Date applicable to such Security, then the Conversion Consideration
with respect to such conversion shall be determined and paid in accordance with
SECTION 10.02(B), except that:

          (i) in the event the Company desires to pay part or all of the
     Conversion Consideration (excluding any cash due in respect of a fractional
     Common Share) due with respect to such conversion in cash, the Cash
     Election Notice shall be made by means of a public announcement, through a
     reputable national newswire service, on or before such Final Notice Date,
     with a written copy thereof to be delivered on such Final Notice Date, to
     the Trustee and the Conversion Agent;

          (ii) in the event such public announcement indicates that the Company
     will solely deliver Common Shares upon conversion after the Final Notice
     Date, then the Conversion Consideration with respect to such conversion
     shall be determined and paid in accordance with SECTION 10.02(B)(II); and

          (iii) the Conversion Retraction Deadline Date shall be the second
     (2nd) Business Day following such Conversion Date.

     (D) If the Conversion Date with respect to a Security tendered for
conversion is after the Net Share Settlement Election Date, then:

          (i) the Company shall, subject to SECTION 10.02(F), deliver, through
     the Conversion Agent, the following to such Holder:

               (1) an amount (the "PRINCIPAL RETURN") in cash equal to the sum
          of the Daily Principal Returns for each Trading Day in the Cash
          Settlement Averaging Period applicable to such conversion; and

               (2) if the sum of the Daily Net Shares for each Trading Day in
          such Cash Settlement Averaging Period is greater than or equal to one
          (1), a certificate for a number of Common Shares (the "NET SHARES")
          equal to such sum; provided, however, that the Company shall not issue
          fractional Common Shares and shall instead deliver cash (in addition
          to any other


                                      -64-



          consideration payable upon such conversion) in an amount equal to the
          value of such fraction computed on the basis of the Volume-Weighted
          Average Price per Common Share on the Trading Day immediately before
          such Conversion Date;

          (ii) the Company shall deliver such Principal Return and, if
     applicable, such Net Shares as soon as practicable following such
     Conversion Date, but in no event later than the Business Day immediately
     after the last Trading Day in the Cash Settlement Averaging Period
     applicable to such conversion; provided, however, that any Make-Whole
     Consideration payable pursuant to SECTION 10.14 shall be delivered by the
     Company within the time period specified in SECTION 10.14(E); and

          (iii) if any Net Shares are due pursuant to SECTION 10.02(D)(I)(2),
     the person in whose name any certificate representing such Net Shares is to
     be registered shall be treated as a shareholder of record of the Company as
     of the close of business on the last Trading Day in the Cash Settlement
     Averaging Period applicable to such conversion.

     "DAILY PRINCIPAL RETURN" shall mean, with respect to a Trading Day, the
     lesser of fifty dollars ($50) and the Daily Conversion Value for such
     Trading Day.

     "DAILY CONVERSION VALUE" shall mean, with respect to a Trading Day,
     one-twentieth (1/20th) of the product of (i) the Conversion Rate in effect
     on such Trading Day and (ii) the Volume-Weighted Average Price per Common
     Share on such Trading Day.

     "DAILY NET SHARES" shall mean, with respect to a Trading Day, an amount
     equal to the following: (i) if the Daily Conversion Value for such Trading
     Day is equal to or lesser than fifty dollars ($50), then the Daily Net
     Shares with respect to such Trading Day shall mean an amount equal to zero
     (0); and (ii) if the Daily Conversion Value for such Trading Day exceeds
     fifty dollars ($50), then the Daily Net Shares with respect to such Trading
     Day shall mean a fraction (a) whose numerator is the excess of such Daily
     Conversion Value over fifty dollars ($50) and (b) whose denominator is the
     Volume-Weighted Average Price per Common Share on such Trading Day;
     provided, however, that the Board of Directors shall, in its good faith
     determination, which shall be described in a Board Resolution, make
     appropriate adjustments to such Daily Net Shares to account for any
     adjustments to the Conversion Rate which shall have become effective, or
     any event requiring an adjustment to the Conversion Rate where the Ex Date
     of such event occurs, during the applicable Cash Settlement Averaging
     Period.

     (E) The Company shall have the right to irrevocably elect (the "IRREVOCABLE
NET SHARE SETTLEMENT ELECTION") that all Securities tendered for conversion,
where the applicable Conversion Date is after the effective date of such
election (the "NET SHARE SETTLEMENT ELECTION DATE"), shall be settled in
accordance with SECTION 10.02(D). The Net Share Settlement Election Date shall
be the later of the date of the public announcement referred to in the
immediately following sentence and November 15, 2011. The Irrevocable Net Share
Settlement Election shall be made by public announcement, through a reputable
national newswire service, that the Company has made an Irrevocable Net Share
Settlement Election, and such public


                                      -65-



announcement must state the effective date of such Irrevocable Net Share
Settlement Election. Once such public announcement is made, such Irrevocable Net
Share Settlement Election shall be irrevocable. Such election shall be at the
sole discretion of the Company and need not require the consent of the Trustee
or of any Holder, and the Company shall cause a written notice of such election
and the effective date thereof to be mailed, on the date of such public
announcement and, if different, also on such effective date, to the Trustee, the
Conversion Agent and each Holder of Securities at such Holder's address as the
same appears on the registry books of the Registrar.

     (F) Notwithstanding anything herein to the contrary, in no event shall the
Company be required to, and in no event shall the Company, issue Common Shares
as payment for Conversion Consideration to the extent, and only to the extent,
such issuance is not permitted by the continued listing standards of the NASDAQ
Global Market or the Toronto Stock Exchange applicable to the Company.
Notwithstanding anything herein to the contrary, in no event shall the Company
be required to issue Common Shares as Conversion Consideration to the extent,
and only to the extent, such issuance will result in the issuance of Common
Shares at an effective conversion price of less than CDN$15.83 per Common Share
(subject to adjustment for stock splits, stock dividends, and similar events)
without shareholder approval in accordance with the rules of the Toronto Stock
Exchange; provided, however, that any failure by the Company to deliver such
Common Shares as Conversion Consideration, where such delivery is otherwise
required by the terms hereof, shall constitute an Event of Default pursuant to
SECTION 6.01(III).

     (G) A Holder of Securities is not entitled, as such, to any rights of a
holder of Common Shares until such Holder has converted its Securities into
Common Shares (to the extent Common Shares are deliverable hereunder upon such
conversion) or is deemed to be a shareholder of record of the Company, as
provided in this SECTION 10.02.

     (H) Except as provided in the Securities or in this ARTICLE X, no payment
or adjustment will be made for accrued interest or additional interest on a
converted Security or for dividends on any Common Shares issued on or prior to
conversion. If any Holder surrenders a Security for conversion after the close
of business on the record date for the payment of an installment of interest and
prior to the related interest payment date, then, notwithstanding such
conversion, the interest payable with respect to such Security on such interest
payment date shall be paid on such interest payment date to the Holder of record
of such Security at the close of business on such record date; provided,
however, that such Security, when surrendered for conversion, must be
accompanied by payment to the Conversion Agent on behalf of the Company of an
amount equal to the interest payable on such interest payment date on the
portion so converted unless either (i) such Security is called for Redemption
pursuant to SECTION 3.04 and PARAGRAPHS 6 AND 7 of the Securities; (ii) the
Company shall have, in respect of a Change in Control, specified a Change in
Control Repurchase Date which is after such record date and on or before such
interest payment date; (iii) such Security is surrendered for conversion after
the close of business on the record date immediately preceding the Maturity Date
or (iv) the Conversion Date for such Security is on or after October 15, 2009
and on or before November 15, 2009; provided further, however, that, if the
Company shall have, prior to the Conversion Date with respect to a Security,
defaulted in a payment of interest on such Security, then in no event shall the
Holder of such Security who surrenders such Security for conversion be required
to pay such defaulted interest or the interest that shall have accrued on such
defaulted interest


                                      -66-



pursuant to SECTION 2.12 or otherwise (it being understood that nothing in this
SECTION 10.02(H) shall affect the Company's obligations under SECTION 2.12).

     (I) If a Holder converts more than one Security at the same time, the
number of full Common Shares issuable upon such conversion, if any, shall be
based on the total principal amount of all Securities converted.

     (J) Upon surrender of a Security that is converted in part, the Trustee
shall authenticate for the Holder a new Security equal in principal amount to
the unconverted portion of the Security surrendered.

     (K) If the last day on which a Security may be converted is a Legal Holiday
in a place where a Conversion Agent is located, the Security may be surrendered
to that Conversion Agent on the next succeeding day that is not a Legal Holiday.

     (L) Notwithstanding anything herein to the contrary, prior to November 16,
2011, no Holder shall have an entitlement to receive consideration, upon
conversion of a Security, that does not consist of Common Shares. For avoidance
of doubt, the foregoing sentence shall in no way affect or limit the ability of
the Company, upon conversion of a Security, to deliver consideration other than
Common Shares in accordance with the provisions of this ARTICLE X.

10.03 TAXES ON CONVERSION.

     If a Holder converts its Security, the Company shall pay any documentary,
stamp or similar issue or transfer tax or duty due on the issue, if any, of
Common Shares upon such conversion. However, such Holder shall pay any such tax
or duty which is due because such shares are issued in a name other than such
Holder's name. The Conversion Agent may refuse to deliver a certificate
representing the Common Shares to be issued in a name other than such Holder's
name until the Conversion Agent receives a sum sufficient to pay any tax or duty
which will be due because such shares are to be issued in a name other than such
Holder's name. Nothing herein shall preclude any tax withholding required by law
or regulation.

10.04 COMPANY TO PROVIDE STOCK.

     The Company shall at all times reserve out of its authorized but unissued
Common Shares or Common Shares held in its treasury enough Common Shares to
permit the conversion, in accordance herewith, of all of the Securities,
assuming that all the Securities then outstanding were to be converted pursuant
to SECTION 10.02(B)(II).

     All Common Shares which may be issued upon conversion of the Securities
shall be validly issued, fully paid and non-assessable and shall be free of
preemptive or similar rights and free of any lien or adverse claim.

     The Company shall comply with all securities laws regulating the offer and
delivery of Common Shares upon conversion of Securities and shall list such
shares on each national securities exchange or automated quotation system on
which the Common Shares are listed.


                                      -67-



10.05 ADJUSTMENT OF CONVERSION RATE.

     The Conversion Rate shall be subject to adjustment from time to time as
     follows:

               (a) In case the Company shall (1) pay a dividend in Common Shares
          to all holders of Common Shares, (2) make a distribution in Common
          Shares to all holders of Common Shares, (3) subdivide the outstanding
          Common Shares into a greater number of Common Shares or (4) combine
          the outstanding Common Shares into a smaller number of Common Shares,
          the Conversion Rate shall be adjusted by multiplying the Conversion
          Rate in effect immediately prior to close of business on the record
          date or effective date, as applicable, of such dividend, distribution,
          subdivision or combination by the number of Common Shares which a
          person who owns only one Common Share immediately before the record
          date or effective date, as applicable, of such dividend, distribution,
          subdivision or combination and who is entitled to participate in such
          dividend, distribution, subdivision or combination would own
          immediately after giving effect to such dividend, distribution,
          subdivision or combination (without giving effect to any arrangement
          pursuant to such dividend, distribution, subdivision or combination
          not to issue fractional Common Shares). Any adjustment made pursuant
          to this SECTION 10.05(A) shall become effective immediately after the
          record date in the case of a dividend or distribution and shall become
          effective immediately after the effective date in the case of a
          subdivision or combination.

               (b) In case the Company shall issue rights or warrants to all or
          substantially all holders of Common Shares, entitling them, for a
          period expiring not more than sixty (60) days immediately following
          the record date for the determination of holders of Common Shares
          entitled to receive such rights or warrants, to subscribe for or
          purchase Common Shares (or securities convertible into or exchangeable
          or exercisable for Common Shares), at a price per share (or having a
          conversion, exchange or exercise price per share) that is less than
          the current market price (as determined pursuant to SECTION 10.05(G))
          per Common Share on the record date for the determination of holders
          of Common Shares entitled to receive such rights or warrants, the
          Conversion Rate shall be increased by multiplying the Conversion Rate
          in effect immediately prior to such record date by a fraction of which
          (A) the numerator shall be the sum of (I) the number of Common Shares
          outstanding at the close of business on such record date and (II) the
          aggregate number of Common Shares (the "UNDERLYING SHARES") underlying
          all such issued rights or warrants (whether by exercise, conversion,
          exchange or otherwise), and (B) the denominator shall be the sum of
          (I) number of Common Shares outstanding at the close of business on
          such record date and (II) the number of Common Shares which the
          aggregate exercise, conversion, exchange or other price at which the
          Underlying Shares may be subscribed for or purchased pursuant to such
          rights or warrants would purchase at such current market price per
          Common Share. Such increase shall become effective immediately prior
          to the opening of business on the day following such record date. In
          no event shall the Conversion Rate be decreased pursuant to this
          SECTION 10.05(B).


                                      -68-



               (c) In case the Company shall dividend or distribute, to all or
          substantially all holders of Common Shares, shares of Capital Stock of
          the Company or any existing or future Subsidiary (other than Common
          Shares), evidences of Indebtedness or other assets (other than
          dividends or distributions requiring an adjustment to the Conversion
          Rate in accordance with SECTIONS 10.05(D) OR 10.05(E)), or shall
          dividend or distribute to all or substantially all holders of Common
          Shares rights or warrants to subscribe for or purchase securities
          (other than dividends or distributions of rights or warrants requiring
          an adjustment to the Conversion Rate in accordance with SECTION
          10.05(B)), then in each such case the Conversion Rate shall be
          increased by multiplying the Conversion Rate in effect immediately
          prior to the close of business on the record date for the
          determination of shareholders entitled to such dividend or
          distribution by a fraction of which (A) the numerator shall be the
          current market price per Common Share (as determined pursuant to
          SECTION 10.05(G)) on such record date and (B) the denominator shall be
          an amount equal to (I) such current market price per Common Share less
          (II) the fair market value (as determined in good faith by the Board
          of Directors, whose determination shall be conclusive and described in
          a Board Resolution), on such record date, of the portion of the shares
          of Capital Stock, evidences of Indebtedness, assets, rights and
          warrants to be dividended or distributed applicable to one Common
          Share, such increase to become effective immediately prior to the
          opening of business on the day following such record date; provided,
          however, that if such denominator is equal to or less than zero, then,
          in lieu of the foregoing adjustment to the Conversion Rate, the
          Conversion Rate shall instead be adjusted to an amount equal to one
          hundredth of a cent ($0.0001); provided, however, that, in lieu of
          adjusting the Conversion Rate pursuant to the immediately preceding
          proviso to an amount equal to one hundredth of a cent ($0.0001), the
          Company may, at its sole discretion, elect to, in lieu of adjusting
          the Conversion Rate pursuant to this SECTION 10.05(C) on account of
          such dividend or distribution, make adequate provision shall be made
          so that each Holder shall have the right to receive upon conversion of
          its Securities, in addition to any consideration otherwise payable as
          herein provided upon such conversion, an amount, per $1,000 principal
          amount of such Securities, of shares of Capital Stock, evidences of
          Indebtedness, assets, rights and/or warrants that a person that owns,
          on such record date, a number of Common Shares equal to the Conversion
          Rate in effect at the close of business on such record date would have
          received as a result of such dividend or distribution. Notwithstanding
          the foregoing, in the event that the Company shall distribute rights
          or warrants (other than distributions of rights or warrants requiring
          an adjustment to the Conversion Rate in accordance with SECTION
          10.05(B)) to acquire Common Shares (collectively, "RIGHTS") pro rata
          to holders of Common Shares, the Company may, in lieu of making any
          adjustment pursuant to this SECTION 10.05(C), make proper provision so
          that each Holder of a Security who converts such Security (or any
          portion thereof) on or after the record date for such distribution and
          prior to the expiration or redemption of the Rights shall be entitled
          to receive upon such conversion, in addition to any consideration
          otherwise payable as herein provided upon such conversion, a number of
          Rights, per $1,000 principal amount of such Security, to


                                      -69-



          be determined as follows: (i) if such conversion occurs on or prior to
          the date for the distribution to the holders of Rights of separate
          certificates evidencing such Rights (the "DISTRIBUTION DATE"), the
          same number of Rights to which a holder of a number of Common Shares
          equal to the Conversion Rate in effect at the close of business on
          such record date (or, in the event such distribution is pursuant to a
          shareholders' rights plan, equal to the number of Common Shares that
          would be issuable upon the conversion of such Security in accordance
          herewith if such Security were surrendered for conversion immediately
          before the close of business on such record date) would be entitled at
          the time of such conversion in accordance with the terms and
          provisions of and applicable to the Rights; and (ii) if such
          conversion occurs after the Distribution Date, the same number of
          Rights to which a holder of a number of Common Shares equal to the
          Conversion Rate in effect immediately prior to the Distribution Date
          (or, in the event such distribution is pursuant to a shareholders'
          rights plan, equal to the number of Common Shares that would be
          issuable upon conversion of such Security in accordance herewith if
          such Security were surrendered for conversion immediately before the
          close of business on the Business Day immediately preceding the
          Distribution Date) would have been entitled on the Distribution Date
          in accordance with the terms and provisions of and applicable to the
          Rights. Any distribution of rights or warrants pursuant to a
          shareholders' rights plan complying with the requirements set forth in
          the preceding sentence of this paragraph and with SECTION 10.13 shall
          not constitute a distribution of rights or warrants pursuant to this
          SECTION 10.05(C). In no event shall the Conversion Rate be decreased
          pursuant to this SECTION 10.05(C).

               (d) In case the Company shall, by dividend or otherwise, at any
          time make a distribution of cash (excluding any cash that is
          distributed as part of a distribution requiring a Conversion Rate
          adjustment pursuant to SECTION 10.05(E)) to all or substantially all
          holders of Common Shares, the Conversion Rate shall be increased by
          multiplying the Conversion Rate in effect immediately prior to the
          open of business on the Ex Date of such dividend or distribution by a
          fraction (A) whose numerator shall be the current market price per
          Common Share (as determined pursuant to SECTION 10.05(G)) on such
          record date and (B) whose denominator shall be an amount equal to (I)
          such current market price per Common Share less (II) the amount of the
          distribution per Common Share; provided, however, that the Conversion
          Rate shall not be adjusted pursuant to this SECTION 10.05(D) to the
          extent, and only to the extent, such adjustment would cause the
          Conversion Price to be less than one hundredth of a cent ($0.0001)
          (which minimum amount shall be subject to appropriate adjustments, in
          the good faith determination of the Board of Directors (whose
          determination shall be described in a Board Resolution), to account
          for stock splits and combinations, stock dividends, reclassifications
          and similar events); provided further that, if the denominator of such
          fraction shall be equal to or less than zero, the Conversion Rate
          shall be instead adjusted so that the Conversion Price is equal to one
          hundredth of a cent ($0.0001) (as adjusted in accordance with the
          immediately preceding proviso); provided further that in no event
          shall the Conversion Rate be adjusted pursuant to this SECTION
          10.05(D) to the extent, and only to the extent,


                                      -70-



          such adjustment shall reduce the Conversion Price below CDN$15.83
          (subject to adjustment for stock splits, stock dividends, and similar
          events) without shareholder approval in accordance with the rules of
          the Toronto Stock Exchange. An adjustment to the Conversion Rate
          pursuant to this SECTION 10.05(D) shall become effective immediately
          prior to the opening of business on the day immediately following such
          record date. In no event shall the Conversion Rate be decreased
          pursuant to this SECTION 10.05(D).

               (e) In case the Company or any Subsidiary shall distribute cash
          or other consideration in respect of a tender offer or exchange offer
          made by the Company or any Subsidiary for all or any portion of the
          Common Shares where the sum of the aggregate amount of such cash
          distributed and the aggregate fair market value (as determined in good
          faith by the Board of Directors, whose determination shall be
          conclusive and set forth in a Board Resolution), as of the Expiration
          Date (as defined below), of such other consideration distributed (such
          sum, the "AGGREGATE AMOUNT") expressed as an amount per Common Share
          validly tendered or exchanged, and not withdrawn, pursuant to such
          tender offer or exchange offer as of the Expiration Time (as defined
          below) (such tendered or exchanged Common Shares, the "PURCHASED
          SHARES") exceeds the Closing Sale Price per Common Share on the first
          Trading Day after last date (such last date, the "EXPIRATION DATE") on
          which tenders or exchanges could have been made pursuant to such
          tender offer or exchange offer (as the same may be amended through the
          Expiration Date), then the Conversion Rate shall be increased by
          multiplying the Conversion Rate in effect immediately prior to the
          close of business on the Expiration Date by a fraction (A) whose
          numerator is equal to the sum of (I) the Aggregate Amount and (II) the
          product of (a) the Closing Sale Price per Common Share on the first
          Trading Day after the Expiration Date and (b) an amount equal to (i)
          the number of Common Shares outstanding as of the last time (the
          "EXPIRATION TIME") at which tenders or exchanges could have been made
          pursuant to such tender offer or exchange offer (including all
          Purchased Shares) less (ii) the Purchased Shares and (B) whose
          denominator is equal to the product of (I) the number of Common Shares
          outstanding as of the Expiration Time (including all Purchased Shares)
          and (II) such Closing Sale Price per Common Share.

                    An increase, if any, to the Conversion Rate pursuant to this
          SECTION 10.05(E) shall become effective immediately prior to the
          opening of business on the second (2nd) Business Day following the
          Expiration Date. In the event that the Company or a Subsidiary is
          obligated to purchase Common Shares pursuant to any such tender offer
          or exchange offer, but the Company or such Subsidiary is permanently
          prevented by applicable law from effecting any such purchases, or all
          such purchases are rescinded, then the Conversion Rate shall again be
          adjusted to be the Conversion Rate which would then be in effect if
          such tender offer or exchange offer had not been made. If the
          application of this SECTION 10.05(E) to any tender offer or exchange
          offer would result in a decrease in the Conversion Rate, no adjustment
          shall be made for such tender offer or exchange offer under this
          SECTION 10.05(E).


                                      -71-



               (f) In addition to the foregoing adjustments in SUBSECTIONS (A),
          (B), (C), (D) and (E) above, the Company, from time to time and to the
          extent permitted by law and by the rules of the NASDAQ Global Market
          and the Toronto Stock Exchange, may increase the Conversion Rate by
          any amount for a period of at least twenty (20) days or such longer
          period as may be required by law, if the Board of Directors has made a
          determination, which determination shall be conclusive, that such
          increase would be in the best interests of the Company. Such
          Conversion Rate increase shall be irrevocable during such period. The
          Company shall give notice to the Trustee and cause notice of such
          increase to be mailed to each Holder of Securities at such Holder's
          address as the same appears on the registry books of the Registrar, at
          least fifteen (15) days prior to the date on which such increase
          commences.

               (g) For the purpose of any computation under SUBSECTIONS (A),
          (B), (C) OR (D) above of this SECTION 10.05, the current market price
          per Common Share on any date shall be deemed to be the average of the
          Closing Sale Prices for the ten (10) consecutive Trading Days ending
          on, but excluding, the earlier of such date and the Ex Date with
          respect to the issuance or distribution requiring such computation;
          provided, however, that such current market price per Common Share
          shall be appropriately adjusted by the Company, in its good faith
          determination, to account for any adjustment, pursuant hereto, to the
          Conversion Rate that shall become effective, or any event requiring,
          pursuant hereto, an adjustment to the Conversion Rate where the Ex
          Date of such event occurs, at any time during the period that begins
          on, and includes, the first day of such ten (10) consecutive Trading
          Days and ends on, and includes, the date when the adjustment to the
          Conversion Rate on account of the event requiring the computation of
          such current market price becomes effective.

                    The term "EX DATE," (i) when used with respect to any
          issuance or distribution, means the first date on which the Common
          Shares trade the regular way on the relevant exchange or in the
          relevant market from which the Closing Sale Price was obtained without
          the right to receive such issuance or distribution, (ii) when used
          with respect to any subdivision or combination of Common Shares, means
          the first date on which the Common Shares trade the regular way on
          such exchange or in such market after the time at which such
          subdivision or combination becomes effective, and (iii) when used with
          respect to any tender offer or exchange offer means the first date on
          which the Common Shares trade the regular way on such exchange or in
          such market after the expiration time of such tender offer or exchange
          offer (as it may be amended or extended).

10.06 NO ADJUSTMENT.

     No adjustment in the Conversion Rate pursuant to SECTION 10.05 shall be
required until cumulative adjustments amount to one percent (1%) or more of the
Conversion Rate as last adjusted (or, if never adjusted, the initial Conversion
Rate); provided, however, that any adjustments to the Conversion Rate which by
reason of this SECTION 10.06 are not required to be made shall be carried
forward and taken into account in any subsequent adjustment to the


                                      -72-



Conversion Rate; provided further, that at the end of each fiscal year of the
Company, beginning with the fiscal year ending on December 31, 2006, any
adjustments to the Conversion Rate that have been, and at such time remain,
deferred pursuant to this SECTION 10.06 shall be given effect, and such
adjustments, if any, shall no longer be carried forward and taken into account
in any subsequent adjustment to the Conversion Rate; provided further, that if
the Company shall mail a notice of Redemption pursuant to SECTION 3.04, or if a
Fundamental Change or Make-Whole Fundamental Change occurs, or if the Securities
shall become convertible pursuant to SECTION 10.01(A)(IV) or SECTION
10.01(A)(V), then, in each case, any adjustments to the Conversion Rate that
have been, and at such time remain, deferred pursuant to this SECTION 10.06
shall be given effect, and such adjustments, if any, shall no longer be carried
forward and taken into account in any subsequent adjustment to the Conversion
Rate. All calculations under this ARTICLE X shall be made to the nearest cent or
to the nearest one-millionth of a share, as the case may be.

     If any rights, options or warrants issued by the Company and requiring an
adjustment to the Conversion Rate in accordance with SECTION 10.05 are only
exercisable upon the occurrence of certain triggering events, then the
Conversion Rate will not be adjusted as provided in SECTION 10.05 until the
earliest of such triggering event occurs. Upon the expiration or termination of
any such rights, options or warrants without the exercise of such rights,
options or warrants, the Conversion Rate then in effect shall be adjusted
immediately to the Conversion Rate which would have been in effect at the time
of such expiration or termination had such rights, options or warrants, to the
extent outstanding immediately prior to such expiration or termination, never
been issued.

     If any dividend or distribution is declared and the Conversion Rate is
adjusted pursuant to SECTION 10.05 on account of such dividend or distribution,
but such dividend or distribution is thereafter not paid or made, the Conversion
Rate shall again be adjusted to the Conversion Rate which would then be in
effect had such dividend or distribution not been declared.

     No adjustment to the Conversion Rate need be made pursuant to SECTION 10.05
for a transaction if Holders are to participate in the transaction without
conversion on a basis and with notice that the Board of Directors determines in
good faith to be fair and appropriate in light of the basis and notice on which
holders of Common Shares participate in the transaction (which determination
shall be described in a Board Resolution).

10.07 OTHER ADJUSTMENTS.

     In the event that, as a result of an adjustment made pursuant to this
ARTICLE X, the Holder of any Security thereafter surrendered for conversion is
to receive (assuming such conversion were to be effected pursuant to SECTION
10.02(B)(II)) any shares of Capital Stock other than Common Shares, thereafter
the Conversion Rate of such other shares so receivable upon conversion of any
Security shall be subject to adjustment from time to time in a manner and on
terms as nearly equivalent as practicable to the provisions with respect to
Common Shares contained in this ARTICLE X.


                                      -73-



10.08 ADJUSTMENTS FOR TAX PURPOSES.

     Except as prohibited by law or by the rules of the NASDAQ Global Market,
the Company may make such increases in the Conversion Rate, in addition to those
required by SECTION 10.05 hereof, as it determines to be advisable in order that
any stock dividend, subdivision of shares, distribution of rights to purchase
stock or securities or distribution of securities convertible into or
exchangeable for stock made by the Company or to its shareholders will not be
taxable to the recipients thereof.

10.09 NOTICE OF ADJUSTMENT.

     Whenever the Conversion Rate is adjusted, the Company shall promptly mail
to Holders at the addresses appearing on the Registrar's books a notice of the
adjustment and file with the Trustee an Officers' Certificate briefly stating
the facts requiring the adjustment and the manner of computing it. The
certificate shall be conclusive evidence of the correctness of such adjustment.

10.10 NOTICE OF CERTAIN TRANSACTIONS.

     In the event that:

                    (1) the Company takes any action, or becomes aware of any
               event, which would require an adjustment in the Conversion Rate,

                    (2) the Company takes any action that would require a
               supplemental indenture pursuant to SECTION 10.11, or

                    (3) there is a dissolution or liquidation of the Company,

the Company shall mail to Holders at the addresses appearing on the Registrar's
books and the Trustee a written notice stating the proposed record, effective or
expiration date, as the case may be, of any transaction referred to in CLAUSE
(1), (2) or (3) of this SECTION 10.10. The Company shall mail such notice at
least twenty (20) days before such date; however, failure to mail such notice or
any defect therein shall not affect the validity of any transaction referred to
in CLAUSE (1), (2) or (3) of this SECTION 10.10.

10.11 EFFECT OF RECLASSIFICATIONS, CONSOLIDATIONS, MERGERS, BINDING SHARE
EXCHANGES OR SALES ON CONVERSION PRIVILEGE.

     (A) Except as provided in SECTION 10.11(B), if any of the following shall
occur (each a "COMMON SHARE CHANGE TRANSACTION"), namely: (i) any
reclassification or change in the Common Shares issuable upon conversion of
Securities (other than a change in par value, or from par value to no par value,
or from no par value to par value, or as a result of a subdivision or
combination of Common Shares), (ii) any consolidation, amalgamation, statutory
arrangement, merger or binding share exchange to which the Company is a party
other than a merger in which the Company is the continuing Person and which does
not result in any reclassification of, or change (other than a change in name,
or par value, or from par value to no par value, or from no par value to par
value or as a result of a subdivision or combination) in, the


                                      -74-



Common Shares or (iii) any sale, transfer, lease, conveyance or other
disposition of all or substantially all of the property or assets of the
Company, or of the Company and the Subsidiaries on a consolidated basis, in each
case pursuant to which the Common Shares would be converted into or exchanged
for, or would constitute solely the right to receive, cash, other securities or
other property, then the Company or such successor or purchasing Person, as the
case may be, shall, as a condition precedent to such reclassification, change,
consolidation, amalgamation, statutory arrangement, merger, binding share
exchange, sale, transfer, lease, conveyance or disposition, execute and deliver
to the Trustee a supplemental indenture in form reasonably satisfactory to the
Trustee providing that, at and after the effective time of such
reclassification, change, consolidation, amalgamation, statutory arrangement,
merger, binding share exchange, sale, transfer, lease, conveyance or
disposition, the Holder of each Security then outstanding shall have the right
to convert such Security (if otherwise convertible pursuant to this ARTICLE X)
into the kind and amount of cash, securities or other property (collectively,
"REFERENCE PROPERTY") receivable upon such reclassification, change,
consolidation, amalgamation, statutory arrangement, merger, binding share
exchange, sale, transfer, lease, conveyance or disposition by a holder of a
number of Common Shares equal to a fraction whose denominator is one thousand
(1,000) and whose numerator is the product of the principal amount of such
Security and the Conversion Rate in effect immediately prior to such
reclassification, change, consolidation, amalgamation, statutory arrangement,
merger, binding share exchange, sale, transfer, lease, conveyance or disposition
(assuming, if holders of Common Shares shall have the opportunity to elect the
form of consideration to receive pursuant to such reclassification, change,
consolidation, merger, binding share exchange, sale, transfer, lease, conveyance
or disposition, that the Collective Election shall have been made with respect
to such election); provided, however, that (1) at and after the effective time
of such reclassification, change, consolidation, amalgamation, statutory
arrangement, merger, binding share exchange, sale, transfer, lease, conveyance
or disposition, (a) the Company shall continue to have the right to elect to pay
in cash all or a portion of the Conversion Consideration due upon a conversion
in accordance with SECTIONS 10.02(B) and 10.02(C), provided the Company shall
not have theretofore made an Irrevocable Net Share Settlement Election and (b)
the Company shall continue to have the right to make an Irrevocable Net Share
Settlement Election in accordance with SECTION 10.02, provided the Company shall
not have made such an election prior to such effective time; (2) in the event
the Company shall have made an Irrevocable Net Share Settlement Election and the
Net Share Settlement Election Date shall be at or prior to such effective time,
then such Irrevocable Net Share Settlement Election shall continue to be in
effect following such effective time and shall continue to be irrevocable; and
(3) at and after such effective time, the Volume-Weighted Average Price used to
calculate the amount of cash or Reference Property due upon conversion of a
Security shall be calculated based on the volume-weighted average price (or, if
such price is not available, the fair value) of the Reference Property instead
of the Volume-Weighted Average Price per Common Share. If holders of Common
Shares shall have the opportunity to elect the form of consideration to receive
pursuant to such reclassification, change, consolidation, amalgamation,
statutory arrangement, merger, binding share exchange, sale, transfer, lease,
conveyance or disposition, then the Company shall make adequate provision to
give Holders, treated as a single class, a reasonable opportunity to elect (the
"COLLECTIVE ELECTION") the form of such consideration for purposes of
determining the composition of the Reference Property referred to in the
immediately preceding sentence, and once such election is made, such election
shall apply to all Holders after the effective time of


                                      -75-



such reclassification, change, consolidation, amalgamation, statutory
arrangement, merger, binding share exchange, sale, transfer, lease, conveyance
or disposition. The supplemental indenture referred to in the first sentence of
this paragraph shall provide for adjustments of the Conversion Rate which shall
be as nearly equivalent as may be practicable to the adjustments of the
Conversion Rate provided for in this ARTICLE X. The foregoing, however, shall
not in any way affect the right a Holder of a Security may otherwise have,
pursuant to SECTION 10.05(C), SECTION 10.05(B) or SECTION 10.13, to receive
rights or warrants upon conversion of a Security. If, in the case of any such
consolidation, amalgamation, statutory arrangement, merger, binding share
exchange, sale, transfer, lease, conveyance or disposition, the stock or other
securities and property (including cash) receivable thereupon by a holder of
Common Shares includes shares of stock or other securities and property of a
Person other than the successor or purchasing Person, as the case may be, in
such consolidation, amalgamation, statutory arrangement, merger, binding share
exchange, sale, transfer, lease, conveyance or disposition, then such
supplemental indenture shall also be executed by such other Person and shall
contain such additional provisions to protect the interests of the Holders of
the Securities as the Board of Directors in good faith shall reasonably
determine necessary by reason of the foregoing (which determination shall be
described in a Board Resolution). The provisions of this SECTION 10.11 shall
similarly apply to successive consolidations, amalgamations, statutory
arrangements, mergers, binding share exchanges, sales, transfers, leases,
conveyances or dispositions.

     In the event the Company shall execute a supplemental indenture pursuant to
this SECTION 10.11, the Company shall promptly file with the Trustee an
Officers' Certificate briefly stating the reasons therefor, the kind or amount
of shares of stock or securities or property (including cash) receivable by
Holders of the Securities upon the conversion of their Securities after any such
reclassification, change, consolidation, amalgamation, statutory arrangement,
merger, binding share exchange, sale, transfer, lease, conveyance or disposition
and any adjustment to be made with respect thereto.

     The Company shall not become a party to any such reclassification, change,
consolidation, amalgamation, statutory arrangement, merger, binding share
exchange, sale, transfer, lease, conveyance or disposition unless the terms
thereof are consistent with this SECTION 10.11.

     (B) Notwithstanding SECTION 10.11(A), if, before the date that is five (5)
years and one (1) day after the last date of original issuance of Securities
(which includes any exercise of the Option), a Common Share Change Transaction
shall occur and SECTION 10.11(A) shall, on account of such Common Share Change
Transaction, otherwise entitle Holders to receive, upon conversion of the
Securities, any property (including cash) or securities ("INELIGIBLE
CONSIDERATION") that would not constitute "prescribed securities" ("PRESCRIBED
SECURITIES") for the purpose of clause 212(1)(b)(vii)(E) of the Income Tax Act
(Canada) (the "CANADIAN INCOME TAX ACT"), then SECTION 10.11(A) shall apply to
such Common Share Change Transaction, except that: (1) Holders shall not have
any right to receive such Ineligible Consideration; (2) the Company or the
successor or acquiror, as the case may be, shall have the right (at the sole
option of the Company, such successor or such acquiror, as the case may be) to
elect (the "CONVERSION CONSIDERATION ELECTION") to satisfy the obligation, if
any, pursuant hereto to deliver, as Conversion Consideration, common shares of
the Company by instead delivering either (a) such Ineligible Consideration or
(b) Prescribed Securities with a market value comparable to that of


                                      -76-



the Ineligible Consideration; and (3) the Company shall, at least thirty (30)
calendar days prior to the effective date of such Common Share Change
Transaction, (a) publicly announce, through a reputable national newswire
service, the consideration elected by the Company to be payable upon conversion
of the Securities after such effective date, and (b) cause written notice of the
same to be mailed to each Holder at the address of such Holder appearing in the
security register.

10.12 TRUSTEE'S DISCLAIMER.

     None of the Trustee, the Bid Solicitation Agent or any other conversion
agent shall be at any time under any duty or responsibility to any Holder to
determine or calculate the Conversion Rate or whether any facts exist which may
require any adjustment of the Conversion Rate, or with respect to the nature or
extent or calculation of any such adjustment when made, or with respect to the
method employed, whether herein or in any supplemental indenture. None of the
Trustee, the Bid Solicitation Agent or any other conversion agent shall be
accountable with respect to the validity or value (or the kind or amount) of any
Common Shares, or of any capital stock, other securities or other assets or
property, which may at any time be issued or delivered upon the conversion of
any Securities, and none of the Trustee, the Bid Solicitation Agent or any other
conversion agent makes any representations with respect thereto. Neither the
Trustee, the Bid Solicitation Agent nor any conversion agent shall be
responsible for any failure of the Company to issue, transfer or deliver any
Common Shares or stock certificates or other securities or property or cash upon
the surrender of any Securities for the purpose of conversion or to comply with
any of the duties, responsibilities or covenants of the Company contained in
this ARTICLE X. Without limiting the generality of the foregoing, neither the
Trustee, the Bid Solicitation Agent nor any conversion agent shall be under any
responsibility to determine the correctness of any provisions contained in any
supplemental indenture entered into pursuant to SECTION 10.11 relating either to
the kind or amount of shares of capital stock or other securities or other
assets or property (including cash) receivable by Holders upon the conversion
Securities after any event referred to in such SECTION 10.11 or relating to to
any Conversion Rate adjustment to be made with respect thereto, but may accept
as conclusive evidence of the correctness of any such provisions, and shall be
protected in relying upon, the Officers' Certificate (which the Company shall be
obligated to deliver to the Trustee prior to the execution of any such
supplemental indenture) with respect thereto.

     In connection with the performance of its duties as Conversion Agent, the
Trustee shall open and maintain a special, segregated, non-interest bearing
trust account for the purpose of receiving any amount of shares of capital stock
or other securities or other assets or property (including cash) receivable by
Holders upon the conversion of Securities.

10.13 RIGHTS DISTRIBUTIONS PURSUANT TO SHAREHOLDERS' RIGHTS PLANS.

     For avoidance of doubt, the Company shall make provision for the Holder of
each Security tendered for conversion pursuant hereto to enjoy the rights
described in any shareholders' rights plan the Company may have in effect at
such time (whether or not the rights have been separated from the Common Shares
prior to the time of conversion), but only to the extent such Holder is to
receive Common Shares upon such conversion.


                                      -77-


10.14 INCREASED CONVERSION RATE APPLICABLE TO CERTAIN NOTES SURRENDERED IN
CONNECTION WITH MAKE-WHOLE FUNDAMENTAL CHANGES.

     (A) Notwithstanding anything herein to the contrary, the Conversion Rate
applicable to each Security that is surrendered for conversion, in accordance
with this ARTICLE X, at any time during the period (the "MAKE-WHOLE CONVERSION
PERIOD") that begins on, and includes, the date that is thirty (30) calendar
days prior to the date originally announced by the Company as the anticipated
effective date of a Make-Whole Fundamental Change (which anticipated effective
date the Company shall disclose, in good faith, in the written notice, public
announcement and publication referred to in SECTION 10.14(F)) and ends on, and
includes, the date that is forty (40) Business Days after the actual effective
date of such Make-Whole Fundamental Change (or, if such Make-Whole Fundamental
Change also constitutes a Change in Control, the Change in Control Repurchase
Date applicable to such Change in Control) shall be increased to an amount equal
to the Conversion Rate that would, but for this SECTION 10.14, otherwise apply
to such Security pursuant to this ARTICLE X, plus an amount equal to the
Make-Whole Applicable Increase; provided, however, that such increase to the
Conversion Rate shall not apply if such Make-Whole Fundamental Change is
announced by the Company but shall not be consummated.

          The additional consideration payable hereunder on account of any
increase to the Conversion Rate made pursuant to this SECTION 10.14 with respect
to a Security surrendered for conversion is herein referred to as the
"MAKE-WHOLE CONSIDERATION." For avoidance of doubt, the amount of the Make-Whole
Consideration due upon the conversion of a Security shall be based on the Cash
Settlement Averaging Period and Volume-Weighted Average Prices applicable to
such conversion pursuant to SECTION 10.02.

     (B) As used herein, "MAKE-WHOLE APPLICABLE INCREASE" shall mean, with
respect to a Make-Whole Fundamental Change, the amount, set forth in the
following table, which corresponds to the effective date of such Make-Whole
Fundamental Change (the "EFFECTIVE DATE") and the Applicable Price of such
Make-Whole Fundamental Change:



                                                       EFFECTIVE DATE
                   --------------------------------------------------------------------------------------
                   November 3,   November 15,   November 15,   November 15,   November 15,   November 20,
APPLICABLE PRICE       2006           2007           2008           2009           2010           2011
- ----------------   -----------   ------------   ------------   ------------   ------------   ------------
                                                                           
$16.43..........      10.14          10.14          10.14          10.14          10.14          10.14
$20.00..........      10.14          10.14          10.14           9.67           7.41           0.00
$25.00..........       6.83           7.45           6.53           5.29           3.38           0.00
$30.00..........       4.21           4.75           4.05           3.15           1.85           0.00
$35.00..........       2.64           3.15           2.64           2.01           1.21           0.00
$40.00..........       1.65           2.14           1.78           1.35           0.89           0.00
$45.00..........       1.00           1.48           1.23           0.95           0.69           0.00
$50.00..........       0.57           1.04           0.87           0.70           0.60           0.00
$55.00..........       0.28           0.75           0.64           0.54           0.55           0.00
$60.00..........       0.10           0.55           0.50           0.50           0.50           0.00


          provided, however, that:

          (i) if the actual Applicable Price of such Make-Whole Fundamental
     Change is between two (2) prices listed in the table above under the column
     titled "Applicable Price," or if the actual Effective Date of such
     Make-Whole Fundamental Change is between two dates listed in the table
     above in the row immediately below the title "Effective Date," then the
     Make-Whole Applicable Increase for such Make-


                                      -78-



     Whole Fundamental Change shall be determined by linear interpolation
     between the Make-Whole Applicable Increases set forth for such two prices,
     or for such two dates based on a three hundred and sixty five (365) day
     year, as applicable;

          (ii) if the actual Applicable Price of such Make-Whole Fundamental
     Change is greater than $60.00 per share (subject to adjustment as provided
     in SECTION 10.14(B)(III)), or if the actual Applicable Price of such
     Make-Whole Fundamental Change is less than $16.43 per share (subject to
     adjustment as provided in SECTION 10.14(B)(III)), then the Make-Whole
     Applicable Increase shall be equal to zero (0);

          (iii) if an event occurs that requires, pursuant to this ARTICLE X
     (other than solely pursuant to this SECTION 10.14), an adjustment to the
     Conversion Rate, then, on the date and at the time such adjustment is so
     required to be made, each price set forth in the table above under the
     column titled "Applicable Price" shall be deemed to be adjusted so that
     such price, at and after such time, shall be equal to the product of (1)
     such price as in effect immediately before such adjustment to such price
     and (2) a fraction whose numerator is the Conversion Rate in effect
     immediately before such adjustment to the Conversion Rate and whose
     denominator is the Conversion Rate to be in effect, in accordance with this
     ARTICLE X, immediately after such adjustment to the Conversion Rate;

          (iv) each Make-Whole Applicable Increase amount set forth in the table
     above shall be adjusted in the same manner in which, and for the same
     events for which, the Conversion Rate is to be adjusted pursuant to SECTION
     10.01 through SECTION 10.13; and

          (v) in no event shall the Conversion Rate applicable to any Security
     be increased pursuant to this SECTION 10.14 to the extent, but only to the
     extent, such increase shall not be permitted by the continued listing
     standards of the NASDAQ Global Market or the Toronto Stock Exchange
     applicable to the Company; provided, however, that any reduction, pursuant
     to this SECTION 10.14(B)(V), in such increase to the Conversion Rate shall
     be made by the Company in good faith and, to the extent practical, pro rata
     in accordance with the principal amount of Securities surrendered for
     conversion in connection with the applicable Make-Whole Fundamental Change.

     (C) Notwithstanding anything herein to the contrary, the Make-Whole
Applicable Increase applicable to a Make-Whole Fundamental Change shall be
deemed to be zero (0) if the Closing Sale Price per Common Share for each of the
five (5) consecutive Trading Days immediately preceding the Effective Date of
such Make-Whole Fundamental Change is greater than sixty dollars ($60.00) (which
dollar amount shall be subject to appropriate adjustments, in the good faith
determination of the Board of Directors (whose determination shall be described
in a Board Resolution), to account for stock splits and combinations, stock
dividends, reclassifications and similar events).

     (D) As used herein, "APPLICABLE PRICE" shall have the following meaning
with respect to a Make-Whole Fundamental Change: (a) if such Make-Whole
Fundamental Change constitutes a Common Shares Change Make-Whole Fundamental
Change and the consideration


                                      -79-



(excluding cash payments for fractional shares or pursuant to statutory
appraisal rights) for the Common Shares in such Make-Whole Fundamental Change
consists solely of cash, then the "Applicable Price" with respect to such
Make-Whole Fundamental Change shall be equal to the cash amount paid per Common
Share in such Make-Whole Fundamental Change; (b) if such Make-Whole Fundamental
Change constitutes an Asset Sale Make-Whole Fundamental Change and the
consideration paid for the property and assets of the Company or the
Subsidiaries consists solely of cash, then the "Applicable Price" with respect
to such Make-Whole Fundamental Change shall be equal to the cash amount paid for
the property and assets of the Company, expressed as an amount per Common Share
outstanding on the Effective Date of such Make-Whole Fundamental Change; and (c)
in all other circumstances, the "Applicable Price" with respect to such
Make-Whole Fundamental Change shall be equal to the average of the Closing Sale
Prices per Common Share for the five (5) consecutive Trading Days immediately
preceding the Effective Date of such Make-Whole Fundamental Change, which
average shall be appropriately adjusted by the Board of Directors, in its good
faith determination (which determination shall be described in a Board
Resolution), to account for any adjustment, pursuant hereto, to the Conversion
Rate that shall become effective, or any event requiring, pursuant hereto, an
adjustment to the Conversion Rate where the Ex Date of such event occurs, at any
time during such five (5) consecutive Trading Days.

     (E) The Make-Whole Consideration due upon a conversion of a Security by a
Holder shall be paid as soon as practicable after the Conversion Date of such
conversion, but in no event later than the second (2nd) Business Day after the
later of (1) the date such Holder surrenders such Security for such conversion;
(2) the last Trading Day in the applicable Cash Settlement Averaging Period; and
(3) the Effective Date of the applicable Make-Whole Fundamental Change. The
consideration in which the Make-Whole Consideration is payable shall be
determined in accordance herewith, including, without limitation, in accordance
with SECTION 10.02 and, to the extent applicable, SECTION 10.11. In the event a
conversion of a Security is made on or before the Net Share Settlement Election
Date and the Company shall have duly given or made a Cash Election Notice in
accordance with SECTION 10.02(B)(I)(A) or 10.02(C)(I), as applicable, then, the
amount and composition of the Make-Whole Consideration due upon such conversion
shall be such that the portion of the entire Conversion Consideration (including
the Make-Whole Consideration) to be paid in cash complies with the amount
specified in such Cash Election Notice to be paid in cash.

     (F) At least thirty (30) calendar days before the anticipated effective
date of each proposed Make-Whole Fundamental Change, the Company shall mail to
each Holder, in accordance with SECTION 11.02, written notice of, and shall
publicly announce, through a reputable national newswire service, and publish on
the Company's website, the anticipated effective date of such proposed
Make-Whole Fundamental Change. Each such notice, announcement and publication
shall also state that, in connection with such Make-Whole Fundamental Change,
the Company shall increase, in accordance herewith, the Conversion Rate
applicable to Securities entitled as provided herein to such increase (along
with a description of how such increase shall be calculated and the time periods
during which Securities must be surrendered in order to be entitled to such
increase). No later than the third Business Day after the Effective Date of each
Make-Whole Fundamental Change, the Company shall mail, in accordance with
SECTION 11.02, written notice of, and shall publicly announce, through a


                                      -80-



reputable national newswire service, and publish on the Company's website, such
Effective Date and the Make-Whole Applicable Increase applicable to such
Make-Whole Fundamental Change.

     (G) For avoidance of doubt, the provisions of this SECTION 10.14 shall not
affect or diminish the Company's obligations, if any, pursuant to ARTICLE IV
with respect to a Make-Whole Fundamental Change.

     (H) Nothing in this SECTION 10.14 shall prevent an adjustment to the
Conversion Rate pursuant to SECTION 10.05 in respect of a Make-Whole Fundamental
Change.

10.15 ADJUSTMENT TO THE CONVERSION RATE FROM, AND INCLUDING, OCTOBER 15, 2009
TO, AND INCLUDING, NOVEMBER 15, 2009.

     (A) At the open of business on October 15, 2009 (or, if such date is not a
Business Day, the first Business Day thereafter), the Conversion Rate shall be
adjusted (the "SECTION 10.15 CONVERSION RATE ADJUSTMENT") to an amount (the
"INITIAL SECTION 10.15 CONVERSION RATE") equal to a fraction whose numerator is
one thousand dollars ($1,000) and whose denominator is the arithmetic average of
the Closing Sale Prices per Common Share during the twenty (20) Trading Days
immediately preceding, and including, the third (3rd) Business Day immediately
preceding October 15, 2009, which average shall be appropriately adjusted, by
the Board of Directors, in its good faith determination, which shall be
described in a Board Resolution, to account for any adjustments to the
Conversion Rate which shall have become effective, or any event requiring an
adjustment to the Conversion Rate where the Ex Date of such event occurs, during
such twenty (20) Trading Days; provided, however, that no such Section 10.15
Conversion Rate Adjustment shall be made if both (1) the Initial Section 10.15
Conversion Rate is less than the Conversion Rate that would otherwise be in
effect at the open of business on October 15, 2009 (or, if such date is not a
Business Day, the first Business Day thereafter) after giving effect to any
other adjustments to the Conversion Rate required to be made pursuant to this
ARTICLE X; and (2) at October 15, 2009, the Securities shall be presently
convertible pursuant to SECTION 10.01(A)(I), SECTION 10.01(A)(II), SECTION
10.01(A)(III), SECTION 10.01(A)(IV) or SECTION 10.01(A)(V).

     (B) If the Conversion Rate shall have been adjusted pursuant to SECTION
10.15(A), then:

          (i) at the open of business on the Business Day immediately after
     November 15, 2009, the Conversion Rate will be readjusted back to the
     Conversion Rate that would have been in effect at such time if no Section
     10.15 Conversion Rate Adjustment had occurred (for avoidance of doubt,
     after giving effect to any other adjustments to the Conversion Rate that
     were required to be made pursuant hereto from, and including, the open of
     business on October 15, 2009 (or, if such date is not a Business Day, the
     first Business Day thereafter) to, and including, the open of business on
     the Business Day immediately after November 15, 2009, assuming the Section
     10.15 Conversion Rate Adjustment had not occurred);

          (ii) if the Company decides to seek shareholder approval in connection
     with the issuance of Common Shares due as Conversion Consideration upon any


                                      -81-



     conversion of a Security where the Conversion Date of such conversion on or
     after October 15, 2009 and on or before November 15, 2009, then,
     notwithstanding anything herein to the contrary, the Company shall be
     permitted to delay the due date by which the Conversion Consideration with
     respect to such conversion would otherwise be due pursuant hereto until the
     fifth (5) Business Day after the obtaining of such requisite approval,
     which approval shall be obtained no later than January 15, 2010; provided,
     however, that nothing in this paragraph shall prevent the occurrence of a
     Default or Event of Default if the Company shall fail to deliver such
     Conversion Consideration by the due date permitted by this paragraph and
     the other terms hereof.

     (C) Notwithstanding anything herein to the contrary, a Holder that converts
a Security where the Conversion Date is on or after October 15, 2009 and on or
before November 15, 2009 shall be entitled to receive from the Company, in cash
(in addition to any other Conversion Consideration otherwise due upon such
conversion), unpaid interest that has accrued on the portion of such Security
being converted to, but excluding, such Conversion Date; provided, however, that
if such Conversion Date is after a record date and on or before the related
interest payment date, then unpaid interest that has accrued to, but excluding,
such interest payment date shall be paid, on such interest payment date, to the
Holder of record of such Security at the close of business on such record date,
and the Holder converting such Security shall not be entitled to such accrued
and unpaid interest unless such Holder was also such record holder.
Notwithstanding anything herein to the contrary, a Holder that converts a
Security where the Conversion Date is on or after October 15, 2009 and on or
before November 15, 2009 shall not be required to make any payment to the
Conversion Agent upon such conversion.

10.16 MANDATORY CONVERSION AT THE COMPANY'S ELECTION.

     (A) If a Make-Whole Fundamental Change occurs, then the Company, at its
option, may elect (a "MANDATORY CONVERSION ELECTION") to cause all, but not less
than all, of the outstanding Securities to be automatically converted, in
accordance with ARTICLE X and this SECTION 10.16.

     (B) If the Company shall make a Mandatory Conversion Election in connection
with a Make-Whole Fundamental Change, then, notwithstanding anything herein to
the contrary, the following provisions shall apply:

          (i) The Company shall publicly announce (the "AUTOMATIC CONVERSION
     NOTICE"), through a reputable national newswire service, such election no
     later than the fifth (5th) Business Day after the Effective Date of the
     such Make-Whole Fundamental Change, such public announcement to be
     irrevocable once made and a condition precedent to such Mandatory
     Conversion Election.

          (ii) Each Security outstanding as of the close of business on the
     first Business Day (the "AUTOMATIC CONVERSION DATE") after the Make-Whole
     Conversion Period applicable to such Make-Whole Fundamental Change shall be
     deemed to be converted (the "AUTOMATIC CONVERSION") as follows:


                                      -82-



               (a) the Conversion Date of such Security shall be the Automatic
          Conversion Date;

               (b) the Conversion Consideration shall be determined in
          accordance with SECTION 10.02(B), 10.02(C) or 10.02(D), as applicable,
          except that:

                    (1) if such Conversion Consideration is to be determined in
               accordance with SECTION 10.02(B) or 10.02(C), then, in lieu of
               making the Cash Election Notice with respect to such Automatic
               Conversion in accordance with such Section, such Cash Election
               Notice shall be stated in such Automatic Conversion Notice;

                    (2) if such Conversion Consideration is to be determined in
               accordance with SECTION 10.02(B) or 10.02(C), then the Holder of
               such Security shall not have the right to retract such Automatic
               Conversion;

                    (3) if such Conversion Consideration is to be determined in
               accordance with SECTION 10.02(B), the Conversion Retraction
               Deadline Date shall, solely for purposes of determining the Cash
               Settlement Averaging Period applicable to such Automatic
               Conversion, be deemed to be the Conversion Date;

                    (4) there shall be added, to Conversion Rate(s) used to
               determine the composition and amount of such Conversion
               Consideration, an amount equal to the Make-Whole Applicable
               Increase applicable to such Make-Whole Fundamental Change, which
               Make-Whole Applicable Increase shall be adjusted in the same
               manner in which, and for the same events for which, the
               Conversion Rate is to be adjusted pursuant to SECTION 10.01
               through SECTION 10.13; and

                    (5) the Holder of such Security shall not be entitled to
               receive any Conversion Consideration with respect to such
               Automatic Conversion until such Holder has tendered such Security
               to the Conversion Agent.

                                XI. MISCELLANEOUS

11.01 TRUST INDENTURE ACT CONTROLS.

     If any provision of this Indenture limits, qualifies or conflicts with
another provision which is required to be included in this Indenture by the TIA,
the required provision of the TIA shall control.

11.02 NOTICES.

     Any notice or communication by the Company or the Trustee to the other is
duly given if in writing and delivered in person, mailed by first-class mail or
by express delivery to the other party's address stated in this SECTION 11.02 or
transmitted by facsimile to the other party at the


                                      -83-



facsimile number of such party stated in this SECTION 11.02. The Company or the
Trustee by notice to the other may designate additional or different addresses
or facsimile numbers for subsequent notices or communications.

     Any notice or communication to a Holder shall be mailed to its address
shown on the register kept by the Registrar. Failure to mail a notice or
communication to a Holder or any defect in it shall not affect its sufficiency
with respect to other Holders.

     If a notice or communication is mailed, or transmitted by facsimile with
proof of transmission, in the manner provided above, it is duly given, whether
or not the addressee receives it.

     If the Company mails a notice or communication to Holders, it shall mail or
transmit by facsimile a copy to the Trustee and each Securities Agent at the
same time.

     All notices or communications shall be in writing.

     The Company's address is:

     Neurochem Inc.
     275 Armand-Frappier Boulevard
     Laval, Quebec H7V 4A7
     Canada
     Attention: General Counsel
     Facsimile: 450-680-4501

     The Trustee's address is:

     The Bank of New York
     101 Barclay Street - 21W
     New York, NY 10286
     Attention: Global Trust Services
     Facsimile: 212-815-5802

11.03 COMMUNICATION BY HOLDERS WITH OTHER HOLDERS.

     Holders may communicate pursuant to TIA Section 312(b) with other Holders
with respect to their rights under this Indenture or the Securities. The
Company, the Trustee, the Registrar and anyone else shall have the protection of
TIA Section 312(c).

11.04 CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.

     Upon any request or application by the Company to the Trustee to take any
action under this Indenture, the Company shall furnish to the Trustee:

          (i) an Officers' Certificate stating that, in the opinion of the
     signatories to such Officers' Certificate, all conditions precedent, if
     any, provided for in this Indenture relating to the proposed action have
     been complied with; and


                                      -84-



          (ii) an Opinion of Counsel stating that, in the opinion of such
     counsel, all such conditions precedent have been complied with.

     Each signatory to an Officers' Certificate or an Opinion of Counsel may (if
so stated) rely, effectively, upon an Opinion of Counsel as to legal matters and
an Officers' Certificate or certificates of public officials as to factual
matters if such signatory reasonably and in good faith believes in the accuracy
of the document relied upon.

11.05 STATEMENTS REQUIRED IN CERTIFICATE OR OPINION.

     Each Officers' Certificate or Opinion of Counsel with respect to compliance
with a condition or covenant provided for in this Indenture shall include:

          (i) a statement that the person making such certificate or opinion has
     read such covenant or condition;

          (ii) a brief statement as to the nature and scope of the examination
     or investigation upon which the statements or opinions contained in such
     certificate or opinion are based;

          (iii) a statement that, in the opinion of such person, he or she has
     made such examination or investigation as is necessary to enable him or her
     to express an informed opinion as to whether or not such covenant or
     condition has been complied with; and

          (iv) a statement as to whether or not, in the opinion of such person,
     such condition or covenant has been complied with.

11.06 RULES BY TRUSTEE AND AGENTS.

     The Trustee may make reasonable rules for action by or at a meeting of
Holders. The Registrar, Paying Agent or Conversion Agent may make reasonable
rules and set reasonable requirements for their respective functions.

11.07 LEGAL HOLIDAYS.

     A "LEGAL HOLIDAY" is a Saturday, a Sunday or a day on which banking
institutions are not required to be open in the City of New York, in the State
of New York or in the city in which the Trustee administers its corporate trust
business. If a payment date is a Legal Holiday at a place of payment, payment
may be made at that place on the next succeeding day that is not a Legal
Holiday, and no interest shall accrue on that payment for the intervening
period.

     A "BUSINESS DAY" is a day other than a Legal Holiday.

11.08 DUPLICATE ORIGINALS.

     The parties may sign any number of copies of this Indenture. Each signed
copy shall be an original, but all of them together represent the same
agreement. Delivery of an executed


                                      -85-



counterpart by facsimile shall be effective as delivery of a manually executed
counterpart thereof.

11.09 GOVERNING LAW.

     The laws of the State of New York, without regard to principles of
conflicts of law, shall govern this Indenture and the Securities.

11.10 NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS.

     This Indenture may not be used to interpret another indenture, loan or debt
agreement of the Company or any of its Subsidiaries. Any such indenture, loan or
debt agreement may not be used to interpret this Indenture.

11.11 SUCCESSORS.

     All agreements of the Company in this Indenture and the Securities shall
bind its successors. All agreements of the Trustee in this Indenture shall bind
its successors.

11.12 SEPARABILITY.

     In case any provision in this Indenture or in the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby
and a Holder shall have no claim therefor against any party hereto.

11.13 TABLE OF CONTENTS, HEADINGS, ETC.

     The Table of Contents, Cross-Reference Table and headings of the Articles
and Sections of this Indenture have been inserted for convenience of reference
only, are not to be considered a part hereof and shall in no way modify or
restrict any of the terms or provisions hereof.

11.14 CALCULATIONS IN RESPECT OF THE SECURITIES.

     The Company and its agents shall make all calculations under this Indenture
and the Securities in good faith. In the absence of manifest error, such
calculations shall be final and binding on all Holders. The Company shall
provide a copy of such calculations to the Trustee as required hereunder, and,
absent such manifest error, the Trustee shall be entitled to rely on the
accuracy of any such calculation without independent verification.

11.15 AGENT FOR SERVICE OF PROCESS.

     The Company hereby irrevocably appoints CT Corporation System, 111 Eighth
Avenue, New York, NY 10011, (212) 894-8400, as its agent to accept and
acknowledge on its behalf service of any and all process which may be served in
any action, proceeding or counterclaim in any way relating to or arising out of
this Indenture.

  [THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS]


                                      -86-



     IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed as of the date first above written.

                                        NEUROCHEM INC.


                                        By: /s/ Mariano Rodriguez
                                            ------------------------------------
                                            Name:  Mariano Rodriguez
                                            Title: Vice President of Finance
                                                   and CFO


                                        THE BANK OF NEW YORK, as Trustee


                                        By: /s/ Lici Zhu
                                            ------------------------------------
                                            Name:  Lici Zhu
                                            Title: Assistant Treasurer



                                                                       EXHIBIT A

                               [Face of Security]

                                 NEUROCHEM INC.

Certificate No. _______

    [INSERT PRIVATE PLACEMENT LEGEND AND GLOBAL SECURITY LEGEND AS REQUIRED]

                       6% Convertible Senior Note due 2026

                             CUSIP No. ____________

     Neurochem Inc., a corporation organized under the Canada Business
Corporations Act (the "COMPANY"), for value received, hereby promises to pay to
[Cede & Co., or its registered assigns,] the principal sum of
_____________________ dollars ($__________) on November 15, 2026 and to pay
interest thereon, as provided on the reverse hereof, until the principal and any
unpaid and accrued interest are paid or duly provided for.

     Interest Payment Dates: May 15 and November 15, with the first payment to
be made on May 15, 2007.

     Record Dates: May 1 and November 1.

     The provisions on the back of this certificate are incorporated as if set
forth on the face hereof.

     IN WITNESS WHEREOF, Neurochem Inc. has caused this instrument to be duly
signed.

                                        NEUROCHEM INC.


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------

Dated:
       ----------------


                                       A-1



TRUSTEE'S CERTIFICATE OF
AUTHENTICATION

This is one of the Securities
referred to in the within-mentioned
Indenture.

The Bank of New York, as Trustee


By:
    ---------------------------------
          Authorized Signatory

Dated:
       ----------------


                                       A-2



                              [REVERSE OF SECURITY]

                                 NEUROCHEM INC.

                       6% CONVERTIBLE SENIOR NOTE DUE 2026

     1. INTEREST. Neurochem Inc., a corporation organized under the Canada
Business Corporations Act (the "COMPANY"), promises to pay interest on the
principal amount of this Security at the rate per annum shown above. The Company
will pay interest, payable semi-annually in arrears, on May 15 and November 15
of each year, with the first payment to be made on May 15, 2007. Interest on the
Securities will accrue on the principal amount from, and including, the most
recent date to which interest has been paid or provided for or, if no interest
has been paid, from, and including, November 9, 2006, in each case to, but
excluding, the next interest payment date or Maturity Date, as the case may be.
Interest will be computed on the basis of a 360-day year of twelve 30-day
months.

     2. MATURITY. The Securities will mature on November 15, 2026.

     3. METHOD OF PAYMENT. Except as provided in the Indenture (as defined
below), the Company will pay interest on the Securities to the persons who are
Holders of record of Securities at the close of business on the record date set
forth on the face of this Security next preceding the applicable interest
payment date. Holders must surrender Securities to a Paying Agent to collect the
principal amount, Redemption Price, Option Purchase Price or Change in Control
Repurchase Price of the Securities, plus, if applicable, accrued and unpaid
interest, if any, payable as herein provided upon Redemption, Purchase at
Holder's Option or Repurchase Upon Change in Control, as the case may be. The
Company will pay, in money of the United States that at the time of payment is
legal tender for payment of public and private debts, all amounts due in cash
with respect to the Securities, which amounts shall be paid (A) in the case this
Security is in global form, by wire transfer of immediately available funds to
the account specified by the Holder hereof and (B) in the case this Security is
held in other than global form, by wire transfer of immediately available funds
to the account specified by the Holder hereof or, if no such account is
specified, by mailing a check to such Holder's address shown in the register of
the Registrar.

     4. PAYING AGENT, REGISTRAR, CONVERSION AGENT. Initially, The Bank of New
York (the "TRUSTEE") will act as Paying Agent, Registrar, Bid Solicitation Agent
and Conversion Agent. The Company may change any Paying Agent, Registrar, Bid
Solicitation Agent or Conversion Agent without notice.

     5. INDENTURE. The Company issued the Securities under an Indenture dated as
of November 9, 2006 (the "INDENTURE") between the Company and the Trustee. The
terms of the Securities include those stated in the Indenture and those made
part of the Indenture by reference to the Trust Indenture Act of 1939 (15 U.S.
Code Sections 77aaa-77bbbb) (the "TIA") as amended and in effect from time to
time. The Securities are subject to all such terms, and Holders are referred to
the Indenture and the TIA for a statement of such terms. The Securities are
general unsecured senior obligations of the Company limited to $40,000,000
aggregate principal amount ($42,085,000 if the Initial Purchaser has elected to
exercise in full the Option to purchase up to


                                       A-3



an additional $2,085,000 aggregate principal amount of the Securities), except
as otherwise provided in the Indenture (except for Securities issued in
substitution for destroyed, mutilated, lost or stolen Securities). Terms used
herein without definition and which are defined in the Indenture have the
meanings assigned to them in the Indenture.

     6. OPTIONAL REDEMPTION.

          The Company shall have the right, at the Company's option, at any
time, and from time to time, on a Redemption Date on or after November 15, 2011,
to redeem all or any part of the Securities at a price payable in cash equal to
one hundred percent (100%) of the principal amount of the Securities to be
redeemed, plus accrued and unpaid interest, if any, to, but excluding, the
Redemption Date.

          Upon surrender to the Paying Agent of a Security subject to
Redemption, such Security shall be paid, to the Holder surrendering such
Security, at the Redemption Price plus accrued and unpaid interest to, but
excluding, the Redemption Date, unless the Redemption Date is after a record
date for the payment of an installment of interest and on or before the related
interest payment date, in which case accrued and unpaid interest to, but
excluding, such interest payment date will be paid, on such interest payment
date, to the Holder of record of such Security at the close of business on such
record date, and the Holder surrendering such Security shall not be entitled to
any such interest unless such Holder was also the Holder of record of such
Security at the close of business on such record date.

     7. NOTICE OF REDEMPTION. Notice of Redemption will be mailed at least
thirty (30) days but not more than sixty (60) days before the Redemption Date to
each Holder of Securities to be redeemed at its address appearing in the
security register. Securities in denominations larger than $1,000 principal
amount may be redeemed in part but only in integral multiples of $1,000
principal amount.

     8. PURCHASE BY THE COMPANY AT THE OPTION OF THE HOLDER. Subject to the
terms and conditions of the Indenture, the Company shall become obligated to
purchase, at the option of each Holder, the Securities held by such Holder on
November 15, 2011, November 15, 2016 and November 15, 2021 (each, an "OPTION
PURCHASE DATE") at an Option Purchase Price, payable in cash, equal to one
hundred percent (100%) of the principal amount of the Securities to be
purchased, plus accrued and unpaid interest, if any, to, but excluding, the
applicable Option Purchase Date, upon delivery of a Purchase Notice containing
the information set forth in the Indenture, at any time from the opening of
business on the date that is twenty (20) Business Days prior to the applicable
Option Purchase Date until the close of business on the Business Day immediately
preceding the applicable Option Purchase Date and upon delivery of the
Securities to the Paying Agent by the Holder as set forth in the Indenture;
provided, however, that that such accrued and unpaid interest shall be paid to
the Holder of record of such Securities at the close of business on the record
date immediately preceding such Option Purchase Date

     9. REPURCHASE AT OPTION OF HOLDER UPON A CHANGE IN CONTROL. Subject to the
terms and conditions of the Indenture, in the event of a Change in Control, the
Company shall make an offer (the "CHANGE IN CONTROL OFFER") to each Holder to
repurchase, and each Holder of Securities shall have the corresponding right
(the "CHANGE IN CONTROL REPURCHASE RIGHT")


                                       A-4


(and not an obligation) to require the Company to repurchase, such Holder's
Securities including any portion thereof which is $1,000 in principal amount or
any integral multiple thereof on a date selected by the Company (the "CHANGE IN
CONTROL REPURCHASE DATE"), which date is no later than thirty five (35) days,
nor earlier than twenty (20) days, after the date on which notice of such Change
in Control is mailed in accordance with the Indenture, at a price payable in
cash equal to one hundred percent (100%) of the principal amount of such
Security, plus accrued and unpaid interest to, but excluding, the Change in
Control Repurchase Date; provided, however, that if such Change in Control
Repurchase Date is after a record date for the payment of an installment of
interest and on or before the related interest payment date, then the accrued
and unpaid interest, if any, to, but excluding, such interest payment date will
be paid on such interest payment date to the Holder of record of such Securities
at the close of business on such record date, and the Holder surrendering such
Securities for repurchase will not be entitled to any such accrued and unpaid
interest unless such Holder was also the Holder of record of such Securities at
the close of business on such record date.

     10. REDEMPTION FOR TAX REASONS. The Company may, at its option, redeem the
Securities, in whole but not in part, at one hundred percent (100%) of the
principal amount of the Securities, plus accrued and unpaid interest, if any,
to, but excluding, the Tax Redemption Date if:

          (i) the Company has become, or would become, obligated to pay to the
     Holder of any Security Additional Amounts that are more than de minimis as
     a result of any change, announced after November 3, 2006, in the laws or
     any regulations of Canada or any Canadian political subdivision or taxing
     authority or any change occurring after November 3, 2006 in the
     interpretation or application of any such laws or regulations by any
     legislative body, court, governmental agency, taxing authority or
     regulatory authority (including the enactment of any legislation and the
     publication of any judicial decision or regulatory or administrative
     determination) (any such change described in this subsection (i), a "CHANGE
     IN CANADIAN TAX LAW");

          (ii) the Company cannot avoid the obligation to pay such non-de
     minimis Additional Amounts by taking reasonable measures available to it;

          (iii) the Company delivers to the Trustee an opinion of Canadian legal
     counsel specializing in taxation and an Officers' Certificate attesting to
     (I) such change in such laws, regulations, interpretation or application
     and (II) the obligation of the Company to pay such non-de minimis
     Additional Amounts; and

          (iv) at least thirty (30) days but not more than sixty (60) days
     before the date (the "TAX REDEMPTION DATE") the Securities are to be
     redeemed pursuant a Tax Redemption, the Company mails, or causes to be
     mailed, by first-class mail to each Holder, at the address of such Holder
     appearing in the security register, a notice of Tax Redemption containing
     the information specified in SECTION 3.10(E) of the indenture; provided,
     however, that (I) the Company shall not mail, or cause to be mailed, a
     notice of Tax Redemption earlier than sixty (60) Business Days prior to the
     earliest date on or from which the Company would be obligated to pay any
     such non-de minimis Additional Amounts and (II) the Company shall not mail,
     or cause to be mailed, a


                                      A-5



     notice of Tax Redemption unless, at the time of such mailing, the
     circumstances creating the Company's obligation to pay such non-de minimis
     Additional Amounts are in effect.

     Except in respect of Excluded Holders, the Company shall not, and shall not
cause any Paying Agent or the Trustee to, deduct from the Tax Redemption Price,
or from the accrued and unpaid interest payable as herein provided upon Tax
Redemption, any amounts on account of, or in respect of, any Canadian
withholding taxes, unless such deduction is required by law (in which case the
Company shall, to the extent it is required to do so under SECTION 4.08 of the
Indenture, pay Additional Amounts with respect thereto, except in respect of
Excluded Holders).

     The right, pursuant to ARTICLE X, to convert Securities called for Tax
Redemption shall terminate at the close of business on the Business Day
immediately preceding the Tax Redemption Date.

     A Holder may elect not to have its Securities, or a portion thereof,
redeemed pursuant to a Tax Redemption by delivering to the Paying Agent, no
later than the close of business on the Business Day immediately preceding the
Tax Redemption Date, a duly completed and signed Notice of Election Upon Tax
Redemption (or any other form of written notice substantially similar thereto);
provided, however, that, after such Tax Redemption Date, no Additional Amounts
shall be payable by the Company on any payment of interest or principal with
respect to Securities for which such a Notice of Election Upon Tax Redemption is
so delivered, and all payments by the Company with respect to such Securities
after such Tax Redemption Date shall be subject to the deduction or withholding
of any Canadian Taxes required to be deducted or withheld. A Holder that has not
so delivered such a Notice of Election Upon Tax Redemption shall have its
Securities redeemed pursuant to the Tax Redemption without further action;
provided, however, that such Holder shall have the right to convert such
Securities in accordance with this Indenture. Notwithstanding anything herein to
the contrary, a Holder may withdraw its Notice of Election Upon Tax Redemption
by delivering to the Paying Agent a letter or telegram, telex or facsimile
transmission (receipt of which is confirmed and promptly followed by a letter)
prior to the close of business on the Business Day immediately preceding the Tax
Redemption Date (or such longer period as may be required by law) containing the
information specified in SECTION 3.10(E)(X) of the Indenture. The Paying Agent
shall promptly notify the Company of the receipt by it of any such written
notice of withdrawal thereof.

     11. CONVERSION.

          Conversion Based on Closing Sale Price of Common Shares. Subject to
earlier Redemption, Purchase at Holder's Option or Repurchase Upon Change in
Control, Holders may surrender Securities in integral multiples of $1,000
principal amount for conversion on any Business Day of a calendar quarter after
the calendar quarter ending December 31, 2006, if the Closing Sale Price for
each of twenty (20) or more Trading Days in a period of thirty (30) consecutive
Trading Days ending on the last Trading Day of the immediately preceding
calendar quarter exceeds one hundred and twenty percent (120%) of the Conversion
Price in effect on the last Trading Day of the immediately preceding calendar
quarter. Solely for purposes of determining whether the Securities shall have
become convertible pursuant to this paragraph, the Board of Directors shall, in
its good faith determination, which shall be described in a Board


                                      A-6



Resolution, make appropriate adjustments to the Closing Sale Prices and/or such
Conversion Price used to determine whether the Securities shall have become
convertible pursuant to this paragraph to account for any adjustments to the
Conversion Rate which shall have become effective, or any event requiring an
adjustment to the Conversion Rate where the Ex Date of such event occurs, during
the period of thirty (30) consecutive Trading Days ending on the last Trading
Day of the immediately preceding calendar quarter.

          Conversion Upon Satisfaction of Trading Price Condition. Subject to
earlier Redemption, Purchase at Holder's Option or Repurchase Upon Change in
Control, Holders may surrender Securities in integral multiples of $1,000
principal amount for conversion during the five (5) consecutive Business Days
immediately after any five (5) consecutive Trading Day period (such five (5)
consecutive Trading Day period, the "NOTE MEASUREMENT PERIOD") in which the
average Trading Price per $1,000 principal amount of the Securities was equal to
or less than ninety seven percent (97%) of the average Conversion Value per
$1,000 principal amount of Securities (as defined below) during the Note
Measurement Period (such condition, the "TRADING PRICE CONDITION"). The Bid
Solicitation Agent shall not have any obligation to determine the Trading Price
unless the Company has requested such determination, and the Company shall have
no obligation to make such request unless a Holder provides the Company with
reasonable evidence that the Trading Price per $1,000 principal amount of the
Securities would be equal to or less than ninety seven percent (97%) of the
product of the Closing Sale Price and the Conversion Rate. Upon receipt of such
evidence, the Company shall instruct the Bid Solicitation Agent to determine the
Trading Price per $1,000 principal amount of the Securities for each of the five
(5) successive Trading Days immediately after the Company receives such evidence
and on each Trading Day thereafter until the first Trading Day on which the
Trading Price Condition is no longer satisfied. For purposes of this paragraph,
the "CONVERSION VALUE" per $1,000 principal amount of Securities, on a given
Trading Day, means the product of the Closing Sale Price on such Trading Day and
the Conversion Rate in effect on such Trading Day.

          Conversion Based on Redemption. A Security, or portion of a Security,
which has been called for Redemption or Tax Redemption may be surrendered in
integral multiples of $1,000 principal amount for conversion; provided, however,
that such Security or portion thereof may be surrendered for conversion pursuant
to this paragraph only until the close of business on the Business Day
immediately preceding the Redemption Date or the Tax Redemption Date, as
applicable.

          Conversion Upon Certain Distributions. Subject to earlier Redemption,
Purchase at Holder's Option or Repurchase Upon Change in Control, if the Company
takes any action, or becomes aware of any event, that would require an
adjustment to the Conversion Rate pursuant to SECTIONS 10.05(B), 10.05(C),
10.05(D) or 10.05(E) of the Indenture, the Securities may be surrendered for
conversion in integral multiples of $1,000 principal amount beginning on the
date the Company mails the notice to the Holders as provided in SECTION 10.10 of
the Indenture (or, if earlier, the date the Company is required to mail such
notice) and at any time thereafter until the close of business on the Business
Day immediately preceding the Ex Date (as defined in SECTION 10.05(G) of the
Indenture) of the applicable transaction or until the Company announces that
such transaction will not take place.


                                      A-7



          Conversion Upon Occurrence of Certain Corporate Transactions. Subject
to earlier Redemption, Purchase at Holder's Option or Repurchase Upon Change in
Control, if either:

     (i) a Fundamental Change occurs; or

     (ii) the Company is a party to a consolidation, amalgamation, statutory
arrangement, merger or binding share exchange pursuant to which the Common
Shares would be converted into or exchanged for, or would constitute solely the
right to receive, cash, securities or other property,

then, in each case, the Securities may be surrendered for conversion at any time
during the period that begins on, and includes, the date that is thirty (30)
calendar days prior to the date originally announced by the Company as the
anticipated effective date of such Fundamental Change, consolidation,
amalgamation, statutory arrangement, merger or binding share exchange (which
anticipated effective date the Company shall disclose, in good faith, in the
written notice, public announcement and publication referred to in SECTION
10.01(D) of the Indenture) and ends on, and includes, the date that is thirty
(30) calendar days after the actual effective date of such Fundamental Change,
consolidation, amalgamation, statutory arrangement, merger or binding share
exchange; provided, however, that if such Fundamental Change, consolidation,
amalgamation, statutory arrangement, merger or binding share exchange shall also
constitute a Make-Whole Fundamental Change, then the Securities may also be
surrendered for conversion at any time during the Make-Whole Conversion Period
applicable to such Make-Whole Fundamental Change; provided, further, that if
such transaction is a Change in Control, then the Securities may also be
surrendered for conversion at any time until, and including, the Change in
Control Repurchase Date applicable to such Change in Control.

          Conversion during specified periods. The Securities may be surrendered
for conversion at any time from, and including, October 15, 2009 to, and
including November 15, 2009, and at any time from, and including, October 15,
2011 to, and including, November 15, 2011 and at any time on or after November
15, 2021.

          Notwithstanding anything herein to the contrary, the right to convert
the Securities pursuant to ARTICLE X of the Indenture shall terminate at the
close of business on the Business Day immediately preceding the Maturity Date.

          To convert a Security, a Holder must (1) complete and sign the
Conversion Notice, with appropriate signature guarantee, on the back of the
Security, (2) surrender the Security to a Conversion Agent, (3) furnish
appropriate endorsements and transfer documents if required by the Registrar or
Conversion Agent, (4) pay the amount of interest, if any, the Holder must pay in
accordance with the Indenture and (5) pay any tax or duty if required pursuant
to the Indenture. A Holder may convert a portion of a Security if the portion is
$1,000 principal amount or an integral multiple of $1,000 principal amount.

          Upon conversion of a Security, the Holder thereof shall be entitled to
receive cash, Common Shares or a combination of cash and Common Shares in
accordance with ARTICLE X of the Indenture.


                                      A-8



          The initial Conversion Rate is 50.7181 Common Shares per $1,000
principal amount of Securities (which results in an effective initial Conversion
Price of approximately $19.7168 per share) subject to adjustment in the event of
certain circumstances as specified in the Indenture. The Company will deliver a
check in lieu of any fractional share. On conversion, no payment or adjustment
for any unpaid and accrued interest or additional interest on the Securities
will be made, except as provided otherwise in the Indenture. If any Holder
surrenders a Security for conversion after the close of business on the record
date for the payment of an installment of interest and prior to the related
interest payment date, then, notwithstanding such conversion, the interest
payable with respect to such Security on such interest payment date shall be
paid on such interest payment date to the Holder of record of such Security at
the close of business on such record date; provided, however, that such
Security, when surrendered for conversion, must be accompanied by payment to the
Conversion Agent on behalf of the Company of an amount equal to the interest
payable on such interest payment date on the portion so converted unless either
(i) such Security is called for Redemption pursuant to SECTION 3.04 of the
Indenture and PARAGRAPHS 6 AND 7 hereof; (ii) the Company shall have, in respect
of a Change in Control, specified a Change in Control Repurchase Date which is
after such record date and on or before such interest payment date; (iii) such
Security is surrendered for conversion after the close of business on the record
date immediately preceding the Maturity Date or (iv) the Conversion Date for
such Security is on or after October 15, 2009 and on or before November 15,
2009; provided further, however, that, if the Company shall have, prior to the
Conversion Date with respect to a Security, defaulted in a payment of interest
on such Security, then in no event shall the Holder of such Security who
surrenders such Security for conversion be required to pay such defaulted
interest or the interest that shall have accrued on such defaulted interest
pursuant to SECTION 2.12 of the Indenture or otherwise (it being understood that
nothing in paragraph shall affect the Company's obligations under SECTION 2.12
of the Indenture).

          The Conversion Rate applicable to each Security that is surrendered
for conversion, in accordance with the Securities and ARTICLE X of the
Indenture, at any time during the Make-Whole Conversion Period with respect to a
Make-Whole Fundamental Change shall be increased to an amount equal to the
Conversion Rate that would, but for SECTION 10.14 of the Indenture, otherwise
apply to such Security pursuant to ARTICLE X of the Indenture, plus an amount
equal to the Make-Whole Applicable Increase; provided, however, that such
increase to the Conversion Rate shall not apply if such Make-Whole Fundamental
Change is announced by the Company but shall not be consummated.

          The Conversion Rate will, in certain circumstances, be adjusted during
the period from, and including, October 15, 2009 to, and including, November 15,
2009, in the manner provided in the Indenture.

          If a Make-Whole Fundamental Change occurs, then the Company, at its
option, may elect to cause all, but not less than all, of the outstanding
Securities to be automatically converted, in accordance with ARTICLE X and
SECTION 10.16 of the Indenture, as of the close of business on the first
Business Day after the Make-Whole Conversion Period applicable to such
Make-Whole Fundamental Change.


                                      A-9



     12. DENOMINATIONS, TRANSFER, EXCHANGE. The Securities are in registered
form, without coupons, in denominations of $1,000 principal amount and integral
multiples of $1,000 principal amount. The transfer of Securities may be
registered and Securities may be exchanged as provided in the Indenture. The
Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents. No service charge shall be made for any
such registration of transfer or exchange, but the Company may require payment
of a sum sufficient to cover any tax or similar governmental charge that may be
imposed in connection with certain transfers or exchanges. The Company or the
Trustee, as the case may be, shall not be required to register the transfer of
or exchange any Security (i) during a period beginning at the opening of
business fifteen (15) days before the mailing of a notice of redemption of the
Securities selected for Redemption under SECTION 3.04 or 3.10 of the Indenture
and ending at the close of business on the day of such mailing or (ii) for a
period of fifteen (15) days before selecting, pursuant to SECTION 3.03 of the
Indenture, Securities to be redeemed or (iii) that has been selected for
Redemption or for which a Purchase Notice has been delivered, and not withdrawn,
in accordance with the Indenture, except the unredeemed or unrepurchased portion
of Securities being redeemed or repurchased in part.

     13. PERSONS DEEMED OWNERS. The registered Holder of a Security may be
treated as the owner of such Security for all purposes.

     14. MERGER OR CONSOLIDATION. The Company shall not consolidate with, or
amalgamate or merge with or into, or sell, transfer, lease, convey or otherwise
dispose of all or substantially all of the property or assets of the Company, or
of the Company and the Subsidiaries on a consolidated basis, to, another person
(including pursuant to a statutory arrangement), whether in a single transaction
or series of related transactions, unless (i) such other person is a corporation
organized and existing under the laws of the United States, any State thereof or
the District of Columbia or the laws of Canada or any province or territory
thereof; (ii) such person assumes by supplemental indenture all the obligations
of the Company under the Securities and the Indenture; and (iii) immediately
after giving effect to the transaction, no Default or Event of Default shall
exist.

     15. AMENDMENTS, SUPPLEMENTS AND WAIVERS. Subject to certain exceptions, the
Indenture or the Securities may be amended or supplemented with the consent of
the Holders of at least a majority in aggregate principal amount of the
outstanding Securities, and certain existing Defaults or Events of Default may
be waived with the consent of the Holders of a majority in aggregate principal
amount of the Securities then outstanding. In accordance with the terms of the
Indenture, the Company, with the consent of the Trustee, may amend or supplement
this Indenture or the Securities without notice to or the consent of any
Securityholder: (i) to comply with SECTIONS 5.01 and 10.11 of the Indenture;
(ii) to make any changes or modifications to the Indenture necessary in
connection with the registration of the Securities under the Securities Act
pursuant to the Registration Rights Agreement or the qualification of the
Indenture under the TIA; (iii) to secure the obligations of the Company in
respect of the Securities; (iv) to add to the covenants of the Company described
in the Indenture for the benefit of Securityholders or to surrender any right or
power conferred upon the Company; and (v) to make provisions with respect to
adjustments to the Conversion Rate as required by the Indenture or to increase
the Conversion Rate in accordance with the Indenture. In addition, the Company
and the Trustee may enter into a supplemental indenture without the


                                      A-10



consent of Holders of the Securities to cure any ambiguity, defect, omission or
inconsistency in the Indenture in a manner that does not, individually or in the
aggregate with all other modifications made or to be made to the Indenture,
adversely affect the rights of any Holder.

     16. DEFAULTS AND REMEDIES.

          If an Event of Default (excluding an Event of Default specified in
SECTION 6.01(IX) or (X) of the Indenture with respect to the Company (but
including an Event of Default specified in SECTION 6.01(IX) or (X) of the
Indenture solely with respect to a Significant Subsidiary of the Company or any
group of Subsidiaries that in the aggregate would constitute a Significant
Subsidiary of the Company)) occurs and is continuing, the Trustee by notice to
the Company or the Holders of at least twenty five percent (25%) in principal
amount of the Securities then outstanding by notice to the Company and the
Trustee may declare the Securities to be due and payable. Upon such declaration,
the principal of, and any accrued and unpaid interest (including any additional
interest) on, all Securities shall be due and payable immediately. If an Event
of Default specified in SECTION 6.01(IX) OR (X) of the Indenture with respect to
the Company (excluding, for purposes of this sentence, an Event of Default
specified in SECTION 6.01(IX) or (X) of the Indenture solely with respect to a
Significant Subsidiary of the Company or any group of Subsidiaries that in the
aggregate would constitute a Significant Subsidiary of the Company) occurs, the
principal of, and accrued and unpaid interest (including any additional
interest) on, all the Securities shall ipso facto become and be immediately due
and payable without any declaration or other act on the part of the Trustee or
any Holder. The Holders of a majority in aggregate principal amount of the
Securities then outstanding by written notice to the Trustee may rescind or
annul an acceleration and its consequences if (A) the rescission would not
conflict with any order or decree, (B) all existing Events of Default, except
the nonpayment of principal or interest (including additional interest) that has
become due solely because of the acceleration, have been cured or waived and (C)
all amounts due to the Trustee under SECTION 7.07 of the Indenture have been
paid.

          Holders may not enforce the Indenture or the Securities except as
provided in the Indenture. The Trustee may require indemnity reasonably
satisfactory to it before it enforces the Indenture or the Securities. The
Holders of a majority in aggregate principal amount of the Securities then
outstanding may direct the time, method and place of conducting any proceeding
for any remedy available to the Trustee or exercising any trust or power
conferred on it. However, the Trustee may refuse to follow any direction that
conflicts with law or the Indenture, is unduly prejudicial to the rights of
other Holders or would involve the Trustee in personal liability unless the
Trustee is offered indemnity reasonably satisfactory to it; provided, that the
Trustee may take any other action deemed proper by the Trustee which is not
inconsistent with such direction.

          If a Default or Event of Default occurs and is continuing as to which
the Trustee has received notice pursuant to the provisions of the Indenture, or
as to which a Responsible Officer of the Trustee shall have actual knowledge,
the Trustee shall mail to each Holder a notice of the Default or Event of
Default within thirty (30) days after it occurs unless such Default or Event of
Default has been cured or waived. Except in the case of a Default or Event of
Default in payment of any amounts due with respect to any Security, the Trustee
may withhold the notice


                                      A-11



if, and so long as it in good faith determines that, withholding the notice is
in the best interests of Holders. The Company must deliver to the Trustee an
annual compliance certificate.

     17. REGISTRATION RIGHTS. The Securities, when originally issued, were not
registered under the Securities Act, and the Securities may not be offered or
sold in the United States absent registration under the Securities Act or an
applicable exemption from the registration requirements of the Securities Act.
The Holders are entitled to registration rights as set forth in the Registration
Rights Agreement. The Holders shall be entitled to receive additional interest
in certain circumstances, all as set forth in the Registration Rights Agreement.

     18. TRUSTEE DEALINGS WITH THE COMPANY. The Trustee under the Indenture, or
any banking institution serving as successor Trustee thereunder, in its
individual or any other capacity, may make loans to, accept deposits from, and
perform services for, the Company or its Affiliates, and may otherwise deal with
the Company or its Affiliates, as if it were not Trustee.

     19. NO RECOURSE AGAINST OTHERS. No past, present or future director,
officer, employee or shareholder, as such, of the Company shall have any
liability for any obligations of the Company under the Securities or the
Indenture or for any claim based on, in respect of, or by reason of, such
obligations or their creation. Each Holder, by accepting a Security, waives and
releases all such liability. The waiver and release are part of the
consideration for the issue of the Securities.

     20. AUTHENTICATION. This Security shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent in accordance
with the Indenture.

     21. ABBREVIATIONS. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entirety), JT TEN (= joint tenants with right of survivorship and
not as tenants in common), CUST (= Custodian), and U/G/M/A (Uniform Gifts to
Minors Act).

     THE COMPANY WILL FURNISH TO ANY HOLDER UPON WRITTEN REQUEST AND WITHOUT
CHARGE A COPY OF THE INDENTURE. REQUESTS MAY BE MADE TO:

                                 Neurochem Inc.
                          275 Armand-Frappier Boulevard
                              Laval, Quebec H7V 4A7
                                     Canada
                           Attention: General Counsel


                                      A-12



                               FORM OF ASSIGNMENT

I or we assign to

PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER
_____________________________________

________________________________________________________________________________
(please print or type name and address)
________________________________________________________________________________

________________________________________________________________________________

the within Security and all rights thereunder, and hereby irrevocably constitute
and appoint
________________________________________________________________________________

Attorney to transfer the Security on the books of the Company with full power of
substitution in the premises.


Dated:
       ------------------------------   ----------------------------------------
                                        NOTICE: The signature on this assignment
                                        must correspond with the name as it
                                        appears upon the face of the within
                                        Security in every particular without
                                        alteration or enlargement or any change
                                        whatsoever and be guaranteed by a
                                        guarantor institution participating in
                                        the Securities Transfer Agents Medallion
                                        Program or in such other guarantee
                                        program acceptable to the Trustee.


Signature Guarantee:
                     -----------------------------------------------------------


                                      A-13



In connection with any transfer of this Security occurring prior to the Resale
Restriction Termination Date, the undersigned confirms that it is making, and it
has not utilized any general solicitation or general advertising in connection
with, the transfer:

                                   [Check One]

(1) ____ to the Company or any Subsidiary thereof, or

(2) ____ pursuant to, and in compliance with, the exemption from registration
         provided by Rule 144A under the Securities Act of 1933, as amended, or

(3) ____ pursuant to, and in compliance with, Rule 904 of Regulation S, or

(4) ____ pursuant to, and in compliance with, the exemption from registration
         provided by Rule 144 under the Securities Act of 1933, as amended, or

(5) ____ pursuant to, and in compliance with, another available exemption from
         registration under the Securities Act of 1933, as amended, or

(6) ____ pursuant to an effective registration statement under the Securities
         Act of 1933, as amended,


                                      A-14



and, unless the box below is checked, the undersigned confirms that the
undersigned is not an "affiliate" of the Company (an "Affiliate") as defined in
Rule 144 under the Securities Act of 1933, as amended:

     [ ]  The transferor is an Affiliate of the Company.

Unless one of the items (1) through (6) is checked, the Trustee will refuse to
register any of the Securities evidenced by this certificate in the name of any
person other than the registered Holder thereof; provided, however, that if item
(3), (4) or (5) is checked, the Company or the Trustee may require, prior to
registering any such transfer of the Securities, in their sole discretion, such
written legal opinions, certifications and other information as the Trustee or
the Company have reasonably requested to confirm that such transfer is being
made pursuant to an exemption from, or in a transaction not subject to, the
registration requirements of the Securities Act of 1933, as amended. If item (2)
is checked, the purchaser must complete the certification below.

If none of the foregoing items are checked, the Trustee or Registrar shall not
be obligated to register this Security in the name of any person other than the
Holder hereof unless and until the conditions to any such transfer of
registration set forth herein and in the Indenture shall have been satisfied.


Dated:                                  Signed:
       ------------------------------           --------------------------------
                                                (Sign exactly as name appears on
                                                the other side of this Security)


Signature Guarantee:
                     -----------------------------------------------------------

TO BE COMPLETED BY PURCHASER IF (2) ABOVE IS CHECKED

The undersigned represents and warrants that it is purchasing this Security for
its own account or an account with respect to which it exercises sole investment
discretion and that it and any such account is a "qualified institutional buyer"
within the meaning of Rule 144A under the Securities Act of 1933, as amended,
and is aware that the sale to it is being made in reliance on Rule 144A and
acknowledges that it has received such information regarding the Company as the
undersigned has requested pursuant to Rule 144A and acknowledges that the
transferor is relying upon the undersigned's foregoing representations in order
to claim the exemption from registration provided by Rule 144A.


Dated:
       ------------------------------   ----------------------------------------
                                        NOTICE: To be executed by an executive
                                        officer


                                      A-15



                                CONVERSION NOTICE

To convert this Security in accordance with the Indenture, check the box: [ ]

To convert only part of this Security, state the principal amount to be
converted (must be in multiples of $1,000):

                              $__________________

If you want the stock certificate representing the Common Shares, if any,
issuable upon conversion made out in another person's name, fill in the form
below:
________________________________________________________________________________
(Insert other person's soc. sec. or tax I.D. no.)
________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________
(Print or type other person's name, address and zip code)
________________________________________________________________________________


Date:                                   Signature(s):
      -------------------------------                 --------------------------
                                        (Sign exactly as your name(s) appear(s)
                                        on the other side of this Security)


Signature(s) guaranteed by:
                                        ----------------------------------------
                                        (All signatures must be guaranteed by a
                                        guarantor institution participating in
                                        the Securities Transfer Agents Medallion
                                        Program or in such other guarantee
                                        program acceptable to the Trustee.)


                                      A-16



                                 PURCHASE NOTICE

Certificate No. of Security: ___________

     If you want to elect to have this Security purchased by the Company
pursuant to SECTION 3.08 of the Indenture, check the box: [ ]

     If you want to elect to have this Security purchased by the Company
pursuant to SECTION 3.09 of the Indenture, check the box: [ ]

     If you want to elect to have only part of this Security purchased by the
Company pursuant to SECTIONS 3.08 OR 3.09 of the Indenture, as applicable, state
the principal amount to be so purchased by the Company:

                      $___________________________________
                      (in an integral multiple of $1,000)


Date:                                   Signature(s):
      -------------------------------                 --------------------------


                                        ----------------------------------------
                                        (Sign exactly as your name(s) appear(s)
                                        on the other side of this Security)


Signature(s) guaranteed by:
                                        ----------------------------------------
                                        (All signatures must be guaranteed by a
                                        guarantor institution participating in
                                        the Securities Transfer Agents Medallion
                                        Program or in such other guarantee
                                        program acceptable to the Trustee.)


                                      A-17



                     NOTICE OF ELECTION UPON TAX REDEMPTION

Certificate No. of Security: ___________

     If you want to elect not to have this Security purchased by the Company
pursuant to SECTION 3.10 of the Indenture, check the box: [ ]

     If you want to elect to have only part of this Security purchased by the
Company pursuant to SECTION 3.10 of the Indenture, as applicable, state the
principal amount to be so purchased by the Company:

                      $___________________________________
                       (in an integral multiple of $1,000)

You understand and hereby acknowledge that Additional Amounts (as defined in the
Indenture) shall not be payable by the Company on any payment of interest or
principal with respect to any Securities which you elect not to be purchased by
the Company pursuant to SECTION 3.10 of the Indenture, and all payments by the
Company with respect to such Securities shall be subject to the deduction or
withholding of any Canadian Taxes (as defined in the Indenture) required to be
deducted or withheld.


Date:                                   Signature(s):
      -------------------------------                 --------------------------
                                        (Sign exactly as your name(s) appear(s)
                                        on the other side of this Security)


Signature(s) guaranteed by:
                                        ----------------------------------------
                                        (All signatures must be guaranteed by a
                                        guarantor institution participating in
                                        the Securities Transfer Agents Medallion
                                        Program or in such other guarantee
                                        program acceptable to the Trustee.)


                                      A-18



                                   SCHEDULE A

          SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL SECURITY(1)

     The following exchanges of a part of this Global Security for an interest
in another Global Security or for Securities in certificated form, have been
made:



                                                                 Principal amount of
                    Amount of decrease                               this Global           Signature or
                   in Principal amount   Amount of Increase in    Security following   authorized signatory
                      of this Global      Principal amount of      such decrease or     of Trustee or Note
Date of Exchange         Security         this Global Security         increase              Custodian
- ----------------   -------------------   ---------------------   -------------------   --------------------
                                                                           



- ----------
(1)  This is included in Global Securities only.


                                      A-19


                                                                     EXHIBIT B-1

                        FORM OF PRIVATE PLACEMENT LEGEND

THE SECURITY REPRESENTED HEREBY AND THE COMMON SHARES, IF ANY, ISSUABLE UPON
CONVERSION OF THIS SECURITY HAVE NOT BEEN REGISTERED UNDER THE US SECURITIES ACT
OF 1933, AS AMENDED (THE "US SECURITIES ACT"), AND MAY NOT BE OFFERED, SOLD,
PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE WITH THE FOLLOWING
SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL INTEREST HEREIN, THE
ACQUIRER:

(1) AGREES FOR THE BENEFIT OF NEUROCHEM INC. (THE "COMPANY") THAT IT WILL NOT
OFFER, SELL, PLEDGE OR OTHERWISE TRANSFER THIS SECURITY OR ANY BENEFICIAL
INTEREST HEREIN PRIOR TO THE DATE THAT IS THE LATER OF (X) TWO YEARS AFTER THE
LATER OF THE ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY
OR ANY AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS SECURITY (OR ANY
PREDECESSOR OF THIS SECURITY) OR SUCH SHORTER PERIOD OF TIME AS PERMITTED BY
RULE 144(K) UNDER THE US SECURITIES ACT OR ANY SUCCESSOR PROVISION THEREUNDER,
AND (Y) SUCH LATER DATE, IF ANY, AS MAY BE REQUIRED BY APPLICABLE LAW, EXCEPT
ONLY:

     (A)  TO THE COMPANY OR ANY SUBSIDIARY THEREOF;

     (B)  OUTSIDE THE UNITED STATES IN ACCORDANCE WITH REGULATION S;

     (C)  PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BECOME EFFECTIVE UNDER
          THE US SECURITIES ACT;

     (D)  TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER
          THE US SECURITIES ACT; OR

     (E)  PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER
          THE US SECURITIES ACT OR ANY OTHER AVAILABLE EXEMPTION FROM THE
          REGISTRATION REQUIREMENTS OF THE US SECURITIES ACT, AND, IN EACH CASE,
          IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS OR THE SECURITIES
          LAWS OF ANY OTHER APPLICABLE JURISDICTION.

PRIOR TO THE REGISTRATION OF ANY TRANSFER IN ACCORDANCE WITH (1)(B) OR (E)
ABOVE, THE COMPANY, AND THE TRUSTEE OR TRANSFER AGENT, RESERVE THE RIGHT TO
REQUIRE THE DELIVERY OF SUCH LEGAL OPINIONS, CERTIFICATIONS OR OTHER EVIDENCE AS
MAY REASONABLY BE REQUIRED IN ORDER TO DETERMINE THAT THE PROPOSED TRANSFER IS
BEING MADE IN COMPLIANCE WITH THE US SECURITIES ACT AND APPLICABLE STATE
SECURITIES LAWS. NO REPRESENTATION IS MADE AS TO THE AVAILABILITY OF ANY
EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE US SECURITIES ACT; AND

(2) AGREES THAT IT WILL NOT DIRECTLY OR INDIRECTLY ENGAGE IN ANY HEDGING
TRANSACTIONS INVOLVING THIS SECURITY OR THE COMMON SHARES ISSUABLE UPON
CONVERSION OF THIS SECURITY UNLESS IN COMPLIANCE WITH THE US SECURITIES ACT.


                                      B1-1



THIS SECURITY SHALL BE ENTITLED TO THE BENEFITS OF THAT CERTAIN REGISTRATION
RIGHTS AGREEMENT, DATED NOVEMBER 9, 2006, BETWEEN THE COMPANY AND UBS SECURITIES
LLC.


                                      B1-2



                                                                     EXHIBIT B-2

                       FORM OF LEGEND FOR GLOBAL SECURITY

     Any Global Security authenticated and delivered hereunder shall bear a
legend (which would be in addition to any other legends required in the case of
a Restricted Security) in substantially the following form:

          THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
     HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A
     NOMINEE OF A DEPOSITARY OR A SUCCESSOR DEPOSITARY. THIS SECURITY IS NOT
     EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN
     THE DEPOSITARY OR ITS NOMINEE EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED
     IN THE INDENTURE, AND NO TRANSFER OF THIS SECURITY (OTHER THAN A TRANSFER
     OF THIS SECURITY AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE
     DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER
     NOMINEE OF THE DEPOSITARY) MAY BE REGISTERED EXCEPT IN THE LIMITED
     CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

          UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
     OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE
     COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT,
     AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN
     SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND
     ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED
     BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
     HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS
     THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

          TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN
     WHOLE, BUT NOT IN PART, TO NOMINEES OF CEDE & CO. OR TO A SUCCESSOR THEREOF
     OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL
     SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE
     RESTRICTIONS SET FORTH IN SECTION 2.16 OF THE INDENTURE.


                                      B2-1



                                                                     EXHIBIT B-3

                     FORM OF CANADIAN SECURITIES LAW LEGEND

     UNLESS PERMITTED BY APPLICABLE CANADIAN SECURITIES LEGISLATION, THE
SECURITY REPRESENTED BY THIS CERTIFICATE MAY NOT BE TRADED IN CANADA OR TO OR
FOR THE BENEFIT OF A CANADIAN RESIDENT UNTIL MARCH 10, 2007.


                                      B3-1



                                                                       EXHIBIT C

          Form of Notice of Transfer Pursuant to Registration Statement

Neurochem Inc.
275 Armand-Frappier Boulevard
Laval, Quebec H7V 4A7
Canada
Attention: General Counsel

The Bank of New York
101 Barclay Street - 21W
New York, NY 10286
Attention: Global Trust Services

     Re:  Neurochem Inc. (the "COMPANY") 6% Convertible Senior Notes due 2026
          (the "SECURITIES")

Ladies and Gentlemen:

     Please be advised that _____________ has transferred $___________ aggregate
principal amount of the Securities and ________ Common Shares, without nominal
or par value, of the Company issued on conversion of the Securities ("STOCK")
pursuant to an effective Shelf Registration Statement on Form F-10 (File No.
333-________).

     We hereby certify that the prospectus delivery requirements, if any, of the
Securities Act of 1933 as amended, have been satisfied with respect to the
transfer described above and that the above-named beneficial owner of the
Securities or Stock is named as a "Selling Security Holder" in the Prospectus
dated _________, or in amendments or supplements thereto, and that the aggregate
principal amount of the Securities and the number of shares of Stock transferred
are [a portion of] the Securities and Stock listed in such Prospectus, as
amended or supplemented, opposite such owner's name.

                                        Very truly yours,


                                        ----------------------------------------
                                                         (Name)


                                       C-1



                                                                       EXHIBIT D

    Form of Opinion of Counsel in Connection with Registration of Securities

The Bank of New York
101 Barclay Street - 21W
New York, NY 10286
Attention: Global Trust Services

     Re:  Neurochem Inc. (the "COMPANY") 6% Convertible Senior Notes due 2026
          (the "SECURITIES")

Ladies and Gentlemen:

     Reference is made to the Securities issued pursuant to a certain Indenture
(the "INDENTURE") dated as of November 9, 2006 by and between the Company and
The Bank of New York, as trustee (the "TRUSTEE"). The Company issued $40,000,000
principal amount of Securities on November 9, 2006 [and an additional
$_____________ on ___________ [IF THE INITIAL PURCHASER'S OPTION IS EXERCISED]]
in transactions exempt from registration under the Securities Act of 1933, as
amended (the "SECURITIES ACT"). The Company has filed with the Securities and
Exchange Commission (the "SEC") [a] [Amendment No. [_] to the] Registration
Statement on Form F-10 (File No. 333-______) (the "REGISTRATION STATEMENT")
relating to the registration under the Securities Act of $______________
principal amount of the Securities and the Common Shares of the Company (the
"SHARES") issuable upon conversion of the Securities being registered. The
Registration Statement was declared effective by order of the SEC dated
_____________.

     We have acted as counsel for the Company in connection with the issuance of
the Securities and the preparation and filing of the Registration Statement and
are familiar with the Securities, the Indenture, the Registration Statement, the
above-mentioned SEC order and such other documents as are necessary to render
this opinion.

     Based on the foregoing, it is our opinion that (1) the Registration
Statement has become effective under the Securities Act and, to our knowledge,
no stop order suspending the effectiveness of the Registration Statement has
been issued, (2) assuming that the Securities covered by the Registration
Statement and the Shares issuable upon conversion of such Securities are sold by
a relevant Holder specified in the Registration Statement in a manner specified
in the Registration Statement, then the Securities and underlying Shares then
sold need not bear the Private Placement Legend (as defined in the Indenture)
and (3) the Indenture has been duly qualified under the Trust Indenture Act of
1939, as amended.

Yours truly,


                                       D-1



                                                                       EXHIBIT E

                     Form of Certificate in Connection with
               Transfers to non-QIB Investors in the United States

The Bank of New York
101 Barclay Street - 21W
New York, NY 10286
Attention: Global Trust Services

     Re:  Neurochem Inc. (the "COMPANY") 6% Convertible Senior Notes due 2026
          (the "SECURITIES")

Ladies and Gentlemen:

     In connection with the undersigned's proposed purchase of Securities (the
"PROPOSED PURCHASE"), the undersigned hereby confirms that:

     1. The undersigned has received such information as the undersigned deems
necessary in order to make an investment decision with respect to the
Securities.

     2. The undersigned understands that any subsequent transfer of the
Securities is subject to certain restrictions and conditions set forth in the
Indenture relating to the Securities, and the undersigned agrees to be bound by,
and not to resell, pledge or otherwise transfer the Securities except in
compliance with, such restrictions, the Securities Act of 1933, as amended (the
"SECURITIES ACT") and all applicable state securities laws.

     3. The undersigned understands that, in connection with the Proposed
Purchase or any proposed resale of any Securities, the undersigned will be
required to furnish to the Registrar and the Company such certification, legal
opinions and other information as the Registrar and the Company may reasonably
require to confirm that the proposed transaction complies with the Securities
Act and other applicable law.

     4. The undersigned is an "accredited investor" (as defined in Regulation D
under the Securities Act) (an "ACCREDITED INVESTOR") and has such knowledge and
experience in financial and business matters as to be capable of evaluating the
merits and risks of an investment in the Securities, and the undersigned and
each account, if any, for which the undersigned is acting is able to bear the
economic risk of the investment in the Securities.

     5. The undersigned is acquiring the Securities for its own account and not
with any view to the distribution of the Securities in violation of U.S. federal
or state securities laws.

     6. The undersigned acknowledges that the Securities and the underlying
common shares have not been registered under the Securities Act and may not be
offered or sold within the United States or to, or for the account or benefit
of, US persons unless the Securities and


                                       E-1



common shares are registered under the Securities Act or an exemption from the
registration requirements the Securities Act is available.

     7. The undersigned has not purchased the Securities as a result of any
general solicitation or general advertising, including advertisements, articles,
notices or other communications published in any newspaper, magazine or similar
media, or broadcast over radio or television, or any seminar or meeting whose
attendees have been invited by general solicitation or general advertising.

     8. The undersigned agrees that if the undersigned resells or otherwise
transfers the Securities or the underlying common shares prior to the date that
is the later of (1) the date that is two years after the later of the date of
original issuance of the Securities and the last date that the Company or an
affiliate of the Company was an owner of such Securities or shares (or any
predecessor thereof), or such other period of time as permitted by Rule 144(k)
under the Securities Act or any successor provision thereto, and (2) such later
date, if any, as may be required by applicable law, the undersigned will do so
only:

          a. to Neurochem or any subsidiary thereof;

          b. outside the United States in accordance with Regulation S;

          c. pursuant to an effective registration statement under the
     Securities Act;

          d. to a qualified institutional buyer in compliance with Rule 144A; or

          e. pursuant to the exemption from registration provided by Rule 144
     under the Securities Act (if available) or any other available exemption
     from registration under the Securities Act, and, in each instance, in
     accordance with applicable U.S. state securities laws or the laws of any
     other applicable jurisdiction.

     9. The undersigned understands that any certificates representing the
Securities or the underlying common shares will bear a legend substantially to
the following effect unless otherwise agreed to by the Company:

     THE SECURITY REPRESENTED HEREBY, AND THE COMMON SHARES, IF ANY, ISSUABLE
     UPON CONVERSION OF THIS SECURITY, HAVE NOT BEEN REGISTERED UNDER THE US
     SECURITIES ACT OF 1933, AS AMENDED (THE "US SECURITIES ACT"), AND MAY NOT
     BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE
     WITH THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
     INTEREST HEREIN, THE ACQUIRER:

     (1) AGREES FOR THE BENEFIT OF NEUROCHEM INC. (THE "COMPANY") THAT IT WILL
     NOT OFFER, SELL, PLEDGE OR OTHERWISE TRANSFER THIS SECURITY OR ANY
     BENEFICIAL INTEREST HEREIN PRIOR TO THE DATE THAT IS THE LATER OF (X) TWO
     YEARS AFTER THE LATER OF THE ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE
     ON WHICH THE COMPANY OR ANY AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS
     SECURITY (OR ANY PREDECESSOR OF THIS SECURITY) OR SUCH SHORTER PERIOD OF
     TIME AS PERMITTED BY RULE 144(K) UNDER THE US SECURITIES ACT OR ANY
     SUCCESSOR PROVISION THEREUNDER, AND (Y) SUCH LATER DATE, IF ANY, AS MAY BE
     REQUIRED BY APPLICABLE LAW, EXCEPT ONLY:


                                       E-2



          (A)  TO THE COMPANY OR ANY SUBSIDIARY THEREOF;

          (B)  OUTSIDE THE UNITED STATES IN ACCORDANCE WITH REGULATION S;

          (C)  PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BECOME EFFECTIVE
               UNDER THE US SECURITIES ACT;

          (D)  TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A
               UNDER THE US SECURITIES ACT; OR

          (E)  PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144
               UNDER THE US SECURITIES ACT OR ANY OTHER AVAILABLE EXEMPTION FROM
               THE REGISTRATION REQUIREMENTS OF THE US SECURITIES ACT, AND, IN
               EACH CASE, IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS OR
               THE SECURITIES LAWS OF ANY OTHER APPLICABLE JURISDICTION.

     PRIOR TO THE REGISTRATION OF ANY TRANSFER IN ACCORDANCE WITH (1)(B) OR (E)
     ABOVE, THE COMPANY, AND THE TRUSTEE OR TRANSFER AGENT, RESERVE THE RIGHT TO
     REQUIRE THE DELIVERY OF SUCH LEGAL OPINIONS, CERTIFICATIONS OR OTHER
     EVIDENCE AS MAY REASONABLY BE REQUIRED IN ORDER TO DETERMINE THAT THE
     PROPOSED TRANSFER IS BEING MADE IN COMPLIANCE WITH THE US SECURITIES ACT
     AND APPLICABLE STATE SECURITIES LAWS. NO REPRESENTATION IS MADE AS TO THE
     AVAILABILITY OF ANY EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE US
     SECURITIES ACT; AND

     (2) AGREES THAT IT WILL NOT DIRECTLY OR INDIRECTLY ENGAGE IN ANY HEDGING
     TRANSACTIONS INVOLVING THIS SECURITY OR THE COMMON SHARES ISSUABLE UPON
     CONVERSION OF THIS SECURITY UNLESS IN COMPLIANCE WITH THE US SECURITIES
     ACT.

     You, the Company and others are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceeding or official inquiry with respect
to the matters covered hereby.

                                        Very truly yours,

                                        [Name of Transferee]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                       E-3



                                                                     EXHIBIT F-1

                Form of Transferor Certificate in Connection with
                       Transfers Pursuant to Regulation S

The Bank of New York
101 Barclay Street - 21W
New York, NY 10286
Attention: Global Trust Services

     Re:  Neurochem Inc. (the "COMPANY") 6% Convertible Senior Notes due 2026
          (the "SECURITIES")

Ladies and Gentlemen:

     In connection with the undersigned's proposed sale of Securities (the
"PROPOSED SALE"), the undersigned hereby confirms that:

     1. The offer of the Securities was not made to a person in the United
States.

     2. Either (1) at the time the buy order was originated, the transferee was
outside the United States or the undersigned and any person acting on the
undersigned's behalf reasonably believes that the buyer was outside the United
States or (2) the Proposed Sale is to be executed in, on or through the
facilities of a "designated offshore securities market" (within the meaning of
Regulation S under the Securities Act of 1933, as amended (the "SECURITIES
ACT")) and neither the undersigned nor any person acting on the undersigned's
behalf knows that the transaction has been pre-arranged with a buyer in the
United States.

     3. The offer and sale is not specifically targeted at identifiable groups
of U.S. citizens abroad.

     4. No "directed selling efforts" (within the meaning of Regulation S under
the Securities Act) were or will be made in the United States by the
undersigned, an affiliate of the undersigned or any person acting on their
behalf.

     5. The Proposed Sale is not part of a plan or scheme to evade the
registration requirements of the Securities Act.

     6. If the undersigned is an affiliate of the Company or a distributor of
the Securities solely by virtue of being an officer or director thereof, then
the undersigned confirms that no selling concession, fee or other remuneration
has been or will be paid in connection with the Proposed Sale other than the
usual and customary broker's commission that would be received by a person
executing such transaction as agent.


                                      F1-1



     7. If the Proposed Sale is made before the "distribution compliance period"
(as defined in Regulation S under the Securities Act) has ended, and if the
undersigned is a dealer or a person receiving a selling concession, fee or other
remuneration in respect of the securities offered or resold, then the
undersigned represents that (1) neither the undersigned nor any person acting on
the undersigned's behalf knows that the offeree or buyer of the securities is a
"U.S. person" (as defined in Regulation S under the Securities Act) and (2) if
the undersigned or any person acting on the undersigned's behalf knows that the
purchaser is a dealer or a person receiving a selling concession, fee or other
remuneration in respect of the Securities, then the undersigned or a person
acting on the undersigned's behalf has sent or will send to the purchaser a
confirmation or other notice meeting the requirements of Rule 904(b)(2)(ii) of
Regulation S under the Securities Act.

     8. The undersigned is not a "distributor" (as defined in Regulation S under
the Securities Act) or an affiliate of a distributor or of the Company (except
solely by virtue of being an officer or director thereof) and is not acting on
behalf of any of the foregoing or of the Company.

     You, the Company and others are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceeding or official inquiry with respect
to the matters covered hereby.

                                        Very truly yours,

                                        [Name of Transferor]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                      F1-2



                                                                     EXHIBIT F-2

                Form of Transferee Certificate in Connection with
                       Transfers Pursuant to Regulation S

The Bank of New York
101 Barclay Street - 21W
New York, NY 10286
Attention: Global Trust Services

     Re:  Neurochem Inc. (the "COMPANY") 6% Convertible Senior Notes due 2026
          (the "SECURITIES")

Ladies and Gentlemen:

     In connection with the undersigned's proposed purchase of Securities (the
"PROPOSED PURCHASE"), the undersigned hereby confirms that:

     1. The undersigned was outside the United States at the time the offer of
the Securities was made to the undersigned.

     2. At the time the buy order was originated, the undersigned was outside
the United States.

     3. The Proposed Purchase is not part of a plan or scheme to evade the
registration requirements of the Securities Act of 1933, as amended (the
"SECURITIES ACT").

     You, the Company and others are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceeding or official inquiry with respect
to the matters covered hereby.

                                        Very truly yours,

                                        [Name of Transferee]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                      F2-1