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                                                                    Exhibit 3.21

                                   SCHEDULE A

                            MEMORANDUM OF ASSOCIATION

                                       OF

                          3003969 NOVA SCOTIA LIMITED.

1.    The name of the Company is 3003969 Nova Scotia Limited.

2.    There are no restrictions the objects and powers of the Company and the
Company shag expressly have the following powers:

      (a)   To sell or dispose of its undertaking, or a substantial part
            thereof;

      (b)   To distribute any of its property in specie among its members; and

      (c)   To amalgamate with any company or other body of persons.

3.    The liability of the members is limited.

4.    The capital of the Company is:

      (a)   10,000 Class A common shares without par value;

      (b)   10,000 Class B common shares without par value; and

      (c)   100,000 preferred shares without par value;

with power to divide the shares in the capital for the dm being into several
classes and to attach thereto respectively any preferred, deferred or qualified
rights, privileges or conditions, including Restrictions on voting rights and
including redemption and purchase of such shares, subject, however, to the
provisions of the Companies Act of Nova Scotia.

The rights, privileges, restrictions and conditions attaching to the Class A
common shares, Class B common shares and preferred shares as are set out in
Schedule A attached hereto.


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                                          Registrar of Joint Stock Companies

                                          Dated 17th day of November, 1997

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                                  SCHEDULE "A"

                         SPECIAL RIGHTS AND RESTRICTIONS

PART 26                 SPECIAL RIGHTS AND RESTRICTIONS
                        ATTACHED TO CLASS A COMMON SHARES

            26.1. The holders of the Class A Common shares shall be entitled to
receive notice of and to attend and vote at all meetings of the shareholders of
the Company and each Class A Common share shall confer upon the holder thereof
the right to one vote in person or by proxy at all meetings of shareholders of
the Company.

            26.2. The Directors may, in their discretion, declare non-cumulative
dividends to any one or more class of shareholders to the exclusion of one or
more of the others. The holders of the Class A Common shares shall be entitled
to such dividends as may be declared upon the Class A Common shares.

            26.3. in the event of the liquidation, dissolution or winding-up of
the Company, whether voluntary or involuntary, the holders of the Class A Common
shares shall, after the holders of the Preferred shares shall have received an
amount equal to the Redemption Amount thereof together with any dividends
declared thereon and unpaid, be entitled to participate pro rata with the
holders of the Class a Common shares in the distribution of the remainder of the
property and assets of the Company.

PART 28                 SPECIAL RIGHTS AND RESTRICTIONS
                        ATTACHED TO CLASS B COMMON SHARES

            28.1. The holders of the Class B Common shares shall be

entitled' to receive notice of and to attend and vote at all meetings of the
shareholders of the Company and each Class B Common share shall confer upon the
holder thereof the right to one vote in person or by proxy at all meetings of
shareholders of the Company.

            28.2. The Directors may, in their discretion, declare non-cumulative
dividends to any one or more class of shareholders to the exclusion of one or
more of the others. The holders of the Class B Common shares shall be entitled
to such dividends as may be declared upon the Class B Common shares.

            28.3. In the event of the liquidation, dissolution or winding-up of
the Company, whether voluntary or involuntary, the holders of the Class B Common
shares shall, after the holders of the Preferred shares shall have received an
amount equal to the Redemption Amount thereof together with any dividends
declared thereon and unpaid, be entitled to participate pro rata with the
holders of the Class A Common shares in the distribution of the remainder of the
property and assets of the Company.


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                         SPECIAL RIGHTS AND RESTRICTIONS
                          ATTACHED TO PREFERRED SHARES

            27.1. The holders of the Preferred shares shall not, as such, have
any voting rights for the election of Directors or for any other purpose, nor
shall they be entitled to attend shareholders' meetings or to receive notice of
shareholders' meetings.

            27.2. The Directors may, in their discretion, declare non-cumulative
dividends to any one or more class of shareholders to the exclusion of one or
more of the others. The holders of the Preferred shares shall be entitled to
non-cumulative dividends not exceeding the rate of eight per cent (8%) per annum
on the Redemption Amount of the Preferred shares.

            27.3. (a) subject to the provisions of the Companies Act, the
Company may, by resolution of the Directors, redeem at any time the whole or
from time to time any part of the then outstanding Preferred shares on payment
for each share of the Redemption Amount thereof as hereinafter defined, together
with any dividends declared thereon and unpaid. In exercising the powers
conferred by this clause, notice shall be given as hereinafter provided, and the
Directors by resolution may discriminate between shareholders of the Preferred
shares and may redeem any part or all of the Preferred shares of one or more
holder or holders without taking similar action with respect to the Preferred
shares of other holders. Not less than fifteen (l5) days' notice in writing of
such redemption shall be given by mailing to the registered holder of the share
or shares to be redeemed specifying the date and place or places of redemption.
If notice of any such redemption be given by the Company in mariner aforesaid
and an amount sufficient to redeem the shares to be redeemed be deposited with
any trust company or chartered bank (as specified in the notice) on or before
the date fixed for redemption, the holders thereof shall thereafter have no
rights against the Company in respect thereof except upon surrender of
certificates for the shares being redeemed to receive payment therefor out of
the moneys so deposited.

                  (b) The Redemption Amount in respect of the Preferred shares
shall be determined by the Directors of the Company at the time of the issuance
of the shares, and shall be equal to the fair market value of the consideration
received by the Company as consideration for the issuance of the Preferred
shares. The amount determined by the Directors (hereinafter called the
"Determined Value") shall be determined by resolutions of the Directors upon the
issuance of any Preferred shares. On determining the Determined Value the
Directors may act on whatever advice or evidence they in their absolute
discretion deem necessary or advisable.

                  (c) The Redemption Amount in respect of each Preferred share
shall be determined by dividing the Redemption Amount for all the Preferred
shares by the number of such shares issued. The paid-up capital of each
Preferred share shall be the par value thereof.

                  (d) Dividends shall not be paid on any other class of shares
of the Company if to do so would reduce the value of the net assets of the
Company to less than the total Redemption Amount of all the Preferred shares
then issued and outstanding.

                  (e) Notwithstanding the provisions of sub-articles (b) and (c)
hereof, if the Minister of National Revenue, the Minister of Finance for the
Province of Nova Scotia, 


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their authorized representative or any similar authority shall assess or
reassess the Company or its shareholders to income tax or propose such an
assessment or reassessment on the basis of a determination or assumption that
the fair market value of the consideration received in respect of the issuance
of any Preferred share or shares does not equal the Determined Value, the
following adjustments shall be made:

            1.    for the purposes of the adjustments hereunder the fair market
                  value of the consideration received shall be deemed to be:

                  (i)   subject to clause (iii), the fair market value of the
                        consideration as determined by the authority making or
                        proposing such an assessment or reassessment, provided
                        that the Directors agree that that determination is
                        accurate; or

                  (ii)  subject to clause (iii), where the Directors do not
                        agree that the authority's determination is accurate,
                        the fair market value of the consideration as determined
                        by a qualified person whom the Directors shall appoint
                        to make that determination forthwith following the
                        making or proposing of such an assessment or
                        reassessment; or

                  (iii) where any such assessment or reassessment is the subject
                        of an appeal to a court of competent jurisdiction, the
                        fair market value of the consideration. as determined by
                        that court.

            2.    If the fair market value determined pursuant to clause 1. is
                  less than the Determined Value, the following adjustments
                  shall be made forthwith following such determination to
                  account for that deficiency:

                  (i)   if at the date of adjustment, the share in respect of
                        the consideration transferred is issued and outstanding
                        and still held by the original holder thereof, its
                        Redemption Amount shall be reduced by an amount equal to
                        the lesser of the deficiency and the amount by which the
                        Redemption Amount of the share exceeds its par value and
                        the Redemption Amount so adjusted shall be deemed
                        retroactively to the date of issue of the share to have
                        been its Redemption Amount. If more than one share in
                        respect of the consideration transferred is issued and
                        outstanding and still held by the original holder
                        thereof, the reduction in the Redemption Amount shall be
                        made pro rata; and


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                  (ii)  If the reduction made pursuant to, subclause 2.(i) is
                        less than the total deficiency, the Redemption Amount of
                        such other Preferred shares held by that original holder
                        at the date of adjustment as may be selected by him
                        shall be reduced by an amount equal to such portion of
                        the deficiency as that original holder may determine and
                        the Redemption Amount of such share so adjusted shall be
                        deemed retroactively to the date of issue of that share
                        to have been its Redemption Amount; and

                  (iii) If the aggregate reduction made pursuant to subclasses
                        2.(i) and 2.(ii) is less than the total deficiency, the
                        original holder shall make a contribution of capital to
                        the Company equal to the balance of the deficiency.

            3.    If the fair market value determined pursuant to clause 1. is
                  greater than the Determined Value, the following adjustments
                  shall be made forthwith following such determination to
                  account for that excess:

                        (i)   If at the date of adjustment the share in respect
                              of the consideration transferred remains issued
                              and outstanding and held by the original holder
                              thereof, the Redemption Amount of that share shall
                              be increased by the amount of the excess and the
                              Redemption Amount so adjusted shall be deemed
                              retroactively to the date of issue of the share to
                              have been its Redemption Amount. If more than one
                              share in respect of the consideration transferred
                              is issued and outstanding and still held by the
                              original holder thereof, the increase in the
                              Redemption Amount shall be made pro rata; and

                        (ii)  In any other case, the Redemption Amounts of all
                              other Preferred shares of the same class held by
                              that original holder at the date of adjustment
                              shall be increased by an amount equal to the
                              excess divided by the number of such Preferred
                              shares and the Redemption Amount of each such
                              share shall be deemed retroactively to the date of
                              issue to have been its Redemption Amount; and if
                              no such shares are held by the original holder at
                              the date of adjustment the Directors shall issue
                              to him Preferred shares of the same class having
                              an aggregate 


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                              Redemption Amount equal to the amount of the 
                              excess.

            27.4. Subject to the provisions of the "Company Act", the Company
shall, upon receiving notice as hereinafter provided from a shareholder holding
Preferred shares, redeem the number of Preferred shares registered in the name
of the shareholder which are specified in the notice by paying to such
shareholder for each Preferred share, to be redeemed the Redemption Amount
thereof as defined in Article 27.3. hereof, together with any dividends declared
thereon and unpaid. Not less than twenty-one (21) days notice in writing-of such
redemption shall be given to the Company by the shareholder seeking to have the
Preferred shares redeemed, such notice to be delivered by mailing to the
registered office of the Company specifying the number of Preferred shares to be
redeemed and surrendering the necessary number of share certificates for
cancellation. The Company may waive any notice required to be given under this
paragraph, and such waiver, whether given before or after the redemption, shall
cure any default in giving such notice.

            27.5. In the event of the liquidation, dissolution or winding-up of
the Company, whether voluntary or involuntary, the holders of the. Preferred
shares shall be entitled to receive the Redemption Amount thereof together with
an amount equal to any dividends declared and unpaid thereon, before any amount
shall be paid or any property or assets distributed to the holders of the Common
shares and upon payment of the amount so payable to them, the holders of the
Preferred shares shall not be entitled to participate any further in the
distribution of the remainder of the property and assets of the Company.


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