EXHIBIT 1


                         REGISTRATION RIGHTS AGREEMENT



                            Dated November 14, 2001



                                    between



                            IPALCO ENTERPRISES, INC.



                                      and



                              LEHMAN BROTHERS INC.
                             ABN AMRO INCORPORATED
                         CIBC WORLD MARKETS CORPORATION
                        SG COWEN SECURITIES CORPORATION
                      MERRILL LYNCH PIERCE FENNER & SMITH
                                  INCORPORATED
                                UBS WARBURG LLC










                         REGISTRATION RIGHTS AGREEMENT


     THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is made and entered
into November 14, 2001, between IPALCO ENTERPRISES, INC., a company
incorporated under the laws of Indiana (the "Company"), and Lehman Brothers
Inc., ABN AMRO Incorporated, CIBC World Markets Corporation, SG Cowen
Securities Corporation, Merrill Lynch, Peirce, Fenner & Smith Incorporated and
UBS Warburg LLC (collectively, the "Placement Agents").

     This Agreement is made pursuant to the Placement Agreement dated November
8, 2001, between the Company and the Placement Agents (the "Placement
Agreement"), which provides for the sale by the Company to the Placement Agents
of an aggregate of $375,000,000,000 principal amount of the Company's 7.375%
senior secured notes due 2008 and an aggregate of $375,000,000,000 principal
amount of the Company's 7.625% senior secured notes due 2011 (collectively, the
"Securities"). In order to induce the Placement Agents to enter into the
Placement Agreement, the Company has agreed to provide to the Placement Agents
and their direct and indirect transferees the registration rights set forth in
this Agreement. The execution of this Agreement is a condition to the closing
under the Placement Agreement.

     In consideration of the foregoing, the parties hereto agree as follows:

     1. Definitions.

     As used in this Agreement, the following capitalized defined terms shall
have the following meanings:

          "1933 Act" shall mean the Securities Act of 1933, as amended from
     time to time.

          "1934 Act" shall mean the Securities Exchange Act of 1934, as amended
     from time to time.

          "Closing Date" shall mean the Closing Date as defined in the
     Placement Agreement.

          "Company" shall have the meaning set forth in the preamble and shall
     also include the Company's successors.

          "Effectiveness Deadline" shall have the meaning set forth in Section
     2(d).

          "Exchange Offer" shall mean the exchange offer by the Company of
     Exchange Securities for Registrable Securities pursuant to Section 2(a)
     hereof.

          "Exchange Offer Registration" shall mean a registration under the
     1933 Act effected pursuant to Section 2(a) hereof.


                                       1



          "Exchange Offer Registration Statement" shall mean an exchange offer
     registration statement on Form S-4 (or, if applicable, on another
     appropriate form) and all amendments and supplements to such registration
     statement, in each case including the Prospectus contained therein, all
     exhibits thereto and all material incorporated by reference therein.

          "Exchange Securities" shall mean securities issued by the Company
     under the Indenture containing terms identical to the Securities (except
     that the Exchange Securities will not contain restrictions on transfer)
     and to be offered to Holders of Securities in exchange for Securities
     pursuant to the Exchange Offer.

          "Holder" shall mean the Placement Agents, for so long as they own any
     Registrable Securities, and each of their successors, assigns and direct
     and indirect transferees who become registered owners of Registrable
     Securities under the Indenture; provided that for purposes of Sections 4
     and 5 of this Agreement, the term "Holder" shall include Participating
     Broker-Dealers (as defined in Section 4(a)).

          "Indenture" shall mean the Indenture relating to the Securities dated
     as of November 14, 2001 between the Company and Bank One, National
     Association, as trustee, and as the same may be amended from time to time
     in accordance with the terms thereof.

          "Majority Holders" shall mean the Holders of a majority of the
     aggregate principal amount of outstanding Registrable Securities; provided
     that whenever the consent or approval of Holders of a specified percentage
     of Registrable Securities is required hereunder, Registrable Securities
     held by the Company or any of its affiliates (as such term is defined in
     Rule 405 under the 1933 Act) (other than the Placement Agents or
     subsequent Holders of Registrable Securities if such subsequent holders
     are deemed to be such affiliates solely by reason of their holding of such
     Registrable Securities) shall not be counted in determining whether such
     consent or approval was given by the Holders of such required percentage
     or amount.

          "Person" shall mean an individual, partnership, limited liability
     company, corporation, trust or unincorporated organization, or a
     government or agency or political subdivision thereof.

          "Placement Agents" shall have the meaning set forth in the preamble.

          "Placement Agreement" shall have the meaning set forth in the
     preamble.

          "Prospectus" shall mean the prospectus included in a Registration
     Statement, including any preliminary prospectus, and any such prospectus
     as amended or supplemented by any prospectus supplement, including a
     prospectus supplement with respect to the terms of the offering of any
     portion of the Registrable Securities covered by a Shelf Registration
     Statement, and by all other amendments and supplements to such prospectus,
     and in each case including all material incorporated by reference therein.


                                       2



          "Registrable Securities" shall mean the Securities; provided,
     however, that the Securities shall cease to be Registrable Securities (i)
     when a Registration Statement with respect to such Securities shall have
     been declared effective under the 1933 Act and such Securities shall have
     been disposed of pursuant to such Registration Statement, (ii) when such
     Securities have been sold to the public pursuant to Rule 144 or is
     saleable pursuant to Rule 144(k) under the Act (or any similar provision
     then in force, but not Rule 144A) under the 1933 Act or (iii) when such
     Securities shall have ceased to be outstanding.

          "Registration Expenses" shall mean any and all expenses incident to
     performance of or compliance by the Company with this Agreement, including
     without limitation: (i) all SEC, stock exchange or National Association of
     Securities Dealers, Inc. registration and filing fees, (ii) all fees and
     expenses incurred in connection with compliance with state securities or
     blue sky laws (including reasonable fees and disbursements of counsel for
     the Placement Agents in connection with blue sky qualification of any of
     the Exchange Securities or Registrable Securities), (iii) all expenses of
     any Persons in preparing or assisting in preparing, word processing,
     printing and distributing any Registration Statement, any Prospectus, any
     amendments or supplements thereto, any underwriting agreements, securities
     sales agreements and other documents relating to the performance of and
     compliance with this Agreement, (iv) all rating agency fees, (v) all fees
     and disbursements relating to the qualification of the Indenture under
     applicable securities laws, (vi) the fees and disbursements of the Trustee
     and its counsel, (vii) the fees and disbursements of counsel for the
     Company and, in the case of a Shelf Registration Statement, the fees and
     disbursements of one counsel for the Holders (which counsel shall be
     selected by the Majority Holders and which counsel may also be counsel for
     the Placement Agents) and (viii) the fees and disbursements of the
     independent public accountants of the Company, including the expenses of
     any special audits or "cold comfort" letters required by or incident to
     such performance and compliance, but excluding fees and expenses of
     counsel to the underwriters (other than fees and expenses set forth in
     clause (ii) above) or the Holders and underwriting discounts and
     commissions and transfer taxes, if any, relating to the sale or
     disposition of Registrable Securities by a Holder.

          "Registration Statement" shall mean any registration statement of the
     Company that covers any of the Exchange Securities or Registrable
     Securities pursuant to the provisions of this Agreement and all amendments
     and supplements to any such Registration Statement, including
     post-effective amendments, in each case including the Prospectus contained
     therein, all exhibits thereto and all material incorporated by reference
     therein.

          "SEC" shall mean the Securities and Exchange Commission.

          "Shelf Registration" shall mean a registration effected pursuant to
     Section 2(b) hereof.

          "Shelf Registration Statement" shall mean a "shelf" registration
     statement of the Company pursuant to the provisions of Section 2(b) of
     this Agreement which covers all of the Registrable Securities (but no
     other securities unless approved by the Holders whose Registrable


                                       3



     Securities are covered by such Shelf Registration Statement) on an
     appropriate form under Rule 415 under the 1933 Act, or any similar rule
     that may be adopted by the SEC, and all amendments and supplements to such
     registration statement, including post-effective amendments, in each case
     including the Prospectus contained therein, all exhibits thereto and all
     material incorporated by reference therein.

          "Trustee" shall mean the trustee with respect to the Securities under
     the Indenture.

          "Underwriter" shall have the meaning set forth in Section 3 hereof.

          "Underwritten Registration" or "Underwritten Offering" shall mean a
     registration in which Registrable Securities are sold to an Underwriter
     for reoffering to the public.

     2. Registration Under the 1933 Act.

     (a) To the extent not prohibited by any applicable law or applicable
interpretation of the Staff of the SEC, the Company shall use its reasonable
best efforts to cause to be filed an Exchange Offer Registration Statement
covering the offer by the Company to the Holders to exchange all of the
Registrable Securities for Exchange Securities and to have such Registration
Statement remain effective until the closing of the Exchange Offer. The Company
shall commence the Exchange Offer promptly after the Exchange Offer
Registration Statement has been declared effective by the SEC, and use its
reasonable best efforts to have the Exchange Offer consummated not later than
60 days after such effective date. The Company shall commence the Exchange
Offer by mailing the related exchange offer Prospectus and accompanying
documents to each Holder stating, in addition to such other disclosures as are
required by applicable law:

          (i) that the Exchange Offer is being made pursuant to this
     Registration Rights Agreement and that all Registrable Securities validly
     tendered will be accepted for exchange;

          (ii) the dates of acceptance for exchange (which shall be a period of
     at least 20 business days from the date such notice is mailed) (the
     "Exchange Dates");

          (iii) that any Registrable Security not tendered will remain
     outstanding and continue to accrue interest, but will not retain any
     rights under this Registration Rights Agreement;

          (iv) that Holders electing to have a Registrable Security exchanged
     pursuant to the Exchange Offer will be required to (a) surrender such
     Registrable Security, together with the enclosed letters of transmittal,
     to the institution and at the address (located in the Borough of
     Manhattan, The City of New York) specified in the notice prior to the
     close of business on the last Exchange Date and (b) at the time of
     consummation of the Exchange Offer, (A) any Exchange Securities received
     by such Holder will be acquired on the ordinary course of its business,
     (B) such Holder will have no arrangement or understanding with any person
     to participate in the distribution of the Securities within the meaning of
     the Act, (C) if the Holder is not a Broker-Dealer or is a Broker-Dealer
     but will not receive Exchange Securities for its own account in exchange


                                       4


     for Securities, neither the Holder nor any such other Person is engaged in
     or intends to participate in a distribution of the Exchange Securities and
     (D) that such Holder is not an Affiliate of the Issuer. If the Holder is a
     Broker-Dealer that will receive Exchanger Securities for its own account
     in exchange for Securities, it will represent that the Securities to be
     exchanged for the Exchange Securities were acquired by it as a result of
     its market-making activities or other trading activities, and will
     acknowledge that it will deliver a prospectus meeting the requirements of
     the Act in connection with any resale of such Exchange Securities. It is
     understood that, by acknowledging that it will deliver, and by delivering,
     a prospectus meeting the requirements of the Act in connection with any
     resale of such Exchange Securities, the Holder is not admitting that it is
     an "underwriter" within the meaning of the Act; and

          (v) that Holders will be entitled to withdraw their election, not
     later than the close of business on the last Exchange Date, by sending to
     the institution and at the address (located in the Borough of Manhattan,
     The City of New York) specified in the notice a telegram, telex, facsimile
     transmission or letter setting forth the name of such Holder, the
     principal amount of Registrable Securities delivered for exchange and a
     statement that such Holder is withdrawing his election to have such
     Securities exchanged.

     As soon as practicable after the last Exchange Date, the Company shall:

          (i) accept for exchange Registrable Securities or portions thereof
     validly tendered and not validly withdrawn pursuant to the Exchange Offer;
     and

          (ii) deliver, or cause to be delivered, to the Trustee for
     cancellation all Registrable Securities or portions thereof so accepted
     for exchange by the Company and issue, and cause the Trustee to promptly
     authenticate and mail to each Holder, an Exchange Security equal in
     principal amount to the principal amount of the Registrable Securities
     surrendered by such Holder.

The Company shall use its reasonable best efforts to complete the Exchange
Offer as provided above and shall comply with the applicable requirements of
the 1933 Act, the 1934 Act and other applicable laws and regulations in
connection with the Exchange Offer. The Exchange Offer shall not be subject to
any conditions, other than that the Exchange Offer does not violate applicable
law or any applicable interpretation of the Staff of the SEC. The Company shall
inform the Placement Agents of the names and addresses of the Holders to whom
the Exchange Offer is made, and the Placement Agents shall have the right,
subject to applicable law, to contact such Holders and otherwise facilitate the
tender of Registrable Securities in the Exchange Offer.

     (b) In the event that (i) the Company determines that the Exchange Offer
Registration provided for in Section 2(a) above is not available or may not be
consummated as soon as practicable after the last Exchange Date because it
would violate applicable law or the applicable interpretations of the Staff of
the SEC, (ii) the Exchange Offer is not for any other reason consummated by
July 11, 2002 or (iii) the Exchange Offer has been completed and in the opinion
of counsel for the Placement Agents a Registration Statement must be filed and
a Prospectus must be delivered by the Placement Agents in connection with any


                                       5



offering or sale of Registrable Securities, the Company shall use its
reasonable best efforts to cause to be filed as soon as practicable after such
determination, date or notice of such opinion of counsel is given to the
Company, as the case may be, a Shelf Registration Statement providing for the
sale by the Holders of all of the Registrable Securities and to have such Shelf
Registration Statement declared effective by the SEC. In the event the Company
is required to file a Shelf Registration Statement solely as a result of the
matters referred to in clause (iii) of the preceding sentence, the Company
shall use its reasonable best efforts to file and have declared effective by
the SEC both an Exchange Offer Registration Statement pursuant to Section 2(a)
with respect to all Registrable Securities and a Shelf Registration Statement
(which may be a combined Registration Statement with the Exchange Offer
Registration Statement) with respect to offers and sales of Registrable
Securities held by the Placement Agents after completion of the Exchange Offer.
The Company agrees to use its reasonable best efforts to keep the Shelf
Registration Statement continuously effective until the expiration of the
period referred to in Rule 144(k) with respect to the Registrable Securities or
such shorter period that will terminate (a) when all of the Registrable
Securities covered by the Shelf Registration Statement have been sold pursuant
to the Shelf Registration Statement or (b), in the case of clause (ii) of the
first sentence of this section 2(b), when the Exchange Offer is consummated.
The Company further agrees to supplement or amend the Shelf Registration
Statement if required by the rules, regulations or instructions applicable to
the registration form used by the Company for such Shelf Registration Statement
or by the 1933 Act or by any other rules and regulations thereunder for shelf
registration or if reasonably requested by a Holder with respect to information
relating to such Holder, and to use its reasonable best efforts to cause any
such amendment to become effective and such Shelf Registration Statement to
become usable as soon as thereafter practicable. The Company agrees to furnish
to the Holders of Registrable Securities copies of any such supplement or
amendment promptly after its being used or filed with the SEC.

     (c) The Company shall pay all Registration Expenses in connection with the
registration pursuant to Section 2(a) or Section 2(b). Each Holder shall pay
all underwriting discounts and commissions and transfer taxes, if any, relating
to the sale or disposition of such Holder's Registrable Securities pursuant to
the Shelf Registration Statement.

     (d) An Exchange Offer Registration Statement pursuant to Section 2(a)
hereof or a Shelf Registration Statement pursuant to Section 2(b) hereof will
not be deemed to have become effective unless it has been declared effective by
the SEC; provided, however, that, if, after it has been declared effective, the
offering of Registrable Securities pursuant to a Shelf Registration Statement
is interfered with by any stop order, injunction or other order or requirement
of the SEC or any other governmental agency or court, such Registration
Statement will be deemed not to have become effective during the period of such
interference until the offering of Registrable Securities pursuant to such
Registration Statement may legally resume. As provided for in the Indenture, in
the event that (i) the Exchange Offer Registration Statement or Shelf
Registration Statement is not declared effective on or prior to 210 days after
the date the Securities are originally issued (the "Effectiveness Deadline"),
the annual interest rate on each series of the Securities will be increased by
0.50% from the Effectiveness Deadline until the Exchange Offer Registration
Statement or the Shelf Registration Statement is declared effective by the SEC;
or, (ii) the Exchange Offer is not consummated on or prior to the earlier of 30
business days after the date of effectiveness of the Exchange Offer
Registration Statement or 30 days after the Effectiveness Deadline, the annual
interest rate on the Securities will be increased by 0.50% until the Exchange


                                       6


Offer is consummated. The annual interest rate on each series of the Securities
will not increase by more than 0.50% notwithstanding the Company's failure to
meet more than one of these requirements. If the Company requests Holders of
Registrable Securities to provide the information as described in Section 3(q),
the Securities held by Holders who do not deliver such information to the
Company when so requested will not be entitled to any such increase in the
interest rate. The additional interest payable on the Securities described in
this clause (d) shall be payable on the regular interest payment dates for the
Securities.

     (e) Without limiting the remedies available to the Placement Agents and
the Holders, the Company acknowledges that any failure by the Company to comply
with its obligations under Section 2(a) and Section 2(b) hereof may result in
material irreparable injury to the Placement Agents or 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,
the Placement Agents or any Holder may obtain such relief as may be required to
specifically enforce the Company's obligations under Section 2(a) and Section
2(b) hereof.

     3. Registration Procedures.

     In connection with the obligations of the Company with respect to the
Registration Statements pursuant to Section 2(a) and Section 2(b) hereof, the
Company shall as expeditiously as possible:

          (a) prepare and file with the SEC a Registration Statement on the
     appropriate form under the 1933 Act, which form (x) shall be selected by
     the Company and (y) shall, in the case of a Shelf Registration, be
     available for the sale of the Registrable Securities by the selling
     Holders thereof and (z) shall comply as to form in all material respects
     with the requirements of the applicable form and include all financial
     statements required by the SEC to be filed therewith, and use its
     reasonable best efforts to cause such Registration Statement to become
     effective and remain effective in accordance with Section 2 hereof;

          (b) prepare and file with the SEC such amendments and post-effective
     amendments to each Registration Statement as may be necessary to keep such
     Registration Statement effective for the applicable period and cause each
     Prospectus to be supplemented by any required prospectus supplement and,
     as so supplemented, to be filed pursuant to Rule 424 under the 1933 Act;
     to keep each Prospectus current during the period described under Section
     4(3) and Rule 174 under the 1933 Act that is applicable to transactions by
     brokers or dealers with respect to the Registrable Securities or Exchange
     Securities;

          (c) in the case of a Shelf Registration, furnish to each Holder of
     Registrable Securities, to counsel for the Placement Agents, to counsel
     for the Holders and to each Underwriter of an Underwritten Offering of
     Registrable Securities, if any, without charge, as many copies of each
     Prospectus, including each preliminary Prospectus, and any amendment or
     supplement thereto and such other documents as such Holder or Underwriter
     may reasonably request, in order to facilitate the public sale or other
     disposition of the Registrable Securities; and the Company consents to the


                                       7



     use of such Prospectus and any amendment or supplement thereto in
     accordance with applicable law by each of the selling Holders of
     Registrable Securities and any such Underwriters in connection with the
     offering and sale of the Registrable Securities covered by and in the
     manner described in such Prospectus or any amendment or supplement thereto
     in accordance with applicable law;

          (d) use its reasonable best efforts to register or qualify the
     Registrable Securities under all applicable state securities or "blue sky"
     laws of such jurisdictions as any Holder of Registrable Securities covered
     by a Registration Statement shall reasonably request in writing by the
     time the applicable Registration Statement is declared effective by the
     SEC, to cooperate with such Holders in connection with any filings
     required to be made with the National Association of Securities Dealers,
     Inc. and do any and all other acts and things which may be reasonably
     necessary or advisable to enable such Holder to consummate the disposition
     in each such jurisdiction of such Registrable Securities owned by such
     Holder; provided, however, that the Company shall not be required to (i)
     qualify as a foreign corporation or as a dealer in securities in any
     jurisdiction where it would not otherwise be required to qualify but for
     this Section 3(d), (ii) file any general consent to service of process or
     (iii) subject itself to taxation in any such jurisdiction if it is not so
     subject;

          (e) in the case of a Shelf Registration, notify each Holder of
     Registrable Securities, counsel for the Holders and counsel for the
     Placement Agents promptly and, if requested by any such Holder or counsel,
     confirm such advice in writing (i) when a Registration Statement has
     become effective and when any post-effective amendment thereto has been
     filed and becomes effective, (ii) of any request by the SEC or any state
     securities authority for amendments and supplements to a Registration
     Statement and Prospectus or for additional information after the
     Registration Statement has become effective, (iii) of the issuance by the
     SEC or any state securities authority of any stop order suspending the
     effectiveness of a Registration Statement or the initiation of any
     proceedings for that purpose, (iv) if, between the effective date of a
     Registration Statement and the closing of any sale of Registrable
     Securities covered thereby, the representations and warranties of the
     Company contained in any underwriting agreement, securities sales
     agreement or other similar agreement, if any, relating to the offering
     cease to be true and correct in all material respects or if the Company
     receives any notification with respect to the suspension of the
     qualification of the Registrable Securities for sale in any jurisdiction
     or the initiation of any proceeding for such purpose, (v) of the happening
     of any event during the period a Shelf Registration Statement is effective
     which makes any statement made in such Registration Statement or the
     related Prospectus untrue in any material respect or which requires the
     making of any changes in such Registration Statement or Prospectus in
     order to make the statements therein not misleading and (vi) of any
     determination by the Company that a post-effective amendment to a
     Registration Statement would be appropriate;

          (f) make every reasonable effort to obtain the withdrawal of any
     order suspending the effectiveness of a Registration Statement at the
     earliest possible moment and provide immediate notice to each Holder of
     the withdrawal of any such order;


                                       8



          (g) in the case of a Shelf Registration, furnish to each Holder of
     Registrable Securities, without charge, at least one conformed copy of
     each Registration Statement and any post-effective amendment thereto
     (without documents incorporated therein by reference or exhibits thereto,
     unless requested);

          (h) in the case of a Shelf Registration, cooperate with the selling
     Holders of Registrable Securities to facilitate the timely preparation and
     delivery of certificates representing Registrable Securities to be sold
     and not bearing any restrictive legends and enable such Registrable
     Securities to be in such denominations (consistent with the provisions of
     the Indenture) and registered in such names as the selling Holders may
     reasonably request at least one business day prior to the closing of any
     sale of Registrable Securities;

          (i) in the case of a Shelf Registration, upon the occurrence of any
     event contemplated by Section 3(e)(v) hereof, use its reasonable best
     efforts to prepare and file with the SEC a supplement or post-effective
     amendment to a Registration Statement or the related Prospectus or any
     document incorporated therein by reference or file any other required
     document so that, as thereafter delivered to the purchasers of the
     Registrable Securities, such Prospectus will not contain any untrue
     statement of a material fact or omit to state a material fact necessary to
     make the statements therein, in light of the circumstances under which
     they were made, not misleading. The Company agrees to notify the Holders
     to suspend use of the Prospectus as promptly as practicable after the
     occurrence of such an event, and the Holders hereby agree to suspend use
     of the Prospectus until the Company has amended or supplemented the
     Prospectus to correct such misstatement or omission;

          (j) a reasonable time prior to the filing of any Registration
     Statement, any Prospectus, any amendment to a Registration Statement or
     amendment or supplement to a Prospectus or any document which is to be
     incorporated by reference into a Registration Statement or a Prospectus
     after initial filing of a Registration Statement, provide copies of such
     document to the Placement Agents and their counsel (and, in the case of a
     Shelf Registration Statement, the Holders and their counsel) and make such
     of the representatives of the Company as shall be reasonably requested by
     the Placement Agents or their counsel (and, in the case of a Shelf
     Registration Statement, the Holders or their counsel) available for
     discussion of such document, and shall not at any time file or make any
     amendment to the Registration Statement, any Prospectus or any amendment
     of or supplement to a Registration Statement or a Prospectus or any
     document which is to be incorporated by reference into a Registration
     Statement or a Prospectus, of which the Placement Agents and their counsel
     (and, in the case of a Shelf Registration Statement, the Holders and their
     counsel) shall not have previously been advised and furnished a copy or to
     which the Placement Agent or their counsel (and, in the case of a Shelf
     Registration Statement, the Holders or their counsel) shall object, except
     for any amendment or supplement or document (a copy of which has been
     previously furnished to the Placement Agents and its counsel (and, in the
     case of a Shelf Registration Statement, the Holders and their counsel))
     which counsel to the Company shall advise the Company in writing is
     required in order to comply with applicable law;


                                       9



          (k) obtain a CUSIP number for all Exchange Securities or Registrable
     Securities, as the case may be, not later than the effective date of a
     Registration Statement;

          (l) cause the Indenture to be qualified under the Trust Indenture Act
     of 1939, as amended (the "TIA"), in connection with the registration of
     the Exchange Securities or Registrable Securities, as the case may be,
     cooperate with the Trustee and the Holders 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 the SEC to enable the Indenture to be so qualified in a
     timely manner;

          (m) in the case of a Shelf Registration, make available for
     inspection by a representative of the Holders of the Registrable
     Securities, any Underwriter participating in any disposition pursuant to
     such Shelf Registration Statement, and attorneys and accountants
     designated by the Holders, at reasonable times and in a reasonable manner,
     all financial and other records, pertinent documents and properties of the
     Company, and cause the respective officers, directors and employees of the
     Company to supply all information reasonably requested by any such
     representative, Underwriter, attorney or accountant in connection with a
     Shelf Registration Statement;

          (n) in the case of a Shelf Registration, use its reasonable best
     efforts to cause all Registrable Securities to be listed on any securities
     exchange or any automated quotation system on which similar securities
     issued by the Company are then listed if requested by the Majority
     Holders, to the extent such Registrable Securities satisfy applicable
     listing requirements;

          (o) use its reasonable best efforts to cause the Exchange Securities
     to continue to be rated by two nationally recognized statistical rating
     organizations (as such term is defined in Rule 436(g)(2) under the 1933
     Act), if the Registrable Securities have been rated;

          (p) if reasonably requested by any Holder of Registrable Securities
     covered by a Registration Statement, (i) promptly incorporate in a
     Prospectus supplement or post-effective amendment such information with
     respect to such Holder as such Holder reasonably requests to be included
     therein and (ii) make all required filings of such Prospectus supplement
     or such post-effective amendment as soon as the Company has received
     notification of the matters to be incorporated in such filing; and

          (q) in the case of a Shelf Registration, enter into such customary
     agreements and take all such other actions in connection therewith
     (including those requested by the Holders of a majority of the Registrable
     Securities being sold) in order to expedite or facilitate the disposition
     of such Registrable Securities including, but not limited to, an
     Underwritten Offering and in such connection, (i) to the extent possible,
     make such representations and warranties to the Holders and any
     Underwriters of such Registrable Securities with respect to the business
     of the Company and its subsidiaries, the Registration Statement,


                                      10



     Prospectus and documents incorporated by reference or deemed incorporated
     by reference, if any, in each case, in form, substance and scope as are
     customarily made by issuers to underwriters in underwritten offerings and
     confirm the same if and when requested, (ii) obtain opinions of counsel to
     the Company (which counsel and opinions, in form, scope and substance,
     shall be reasonably satisfactory to the Holders and such Underwriters and
     their respective counsel) addressed to each selling Holder and Underwriter
     of Registrable Securities, covering the matters customarily covered in
     opinions requested in underwritten offerings, (iii) obtain "cold comfort"
     letters from the independent certified public accountants of the Company
     (and, if necessary, any other certified public accountant of any
     subsidiary of the Company, or of any business acquired by the Company for
     which financial statements and financial data are or are required to be
     included in the Registration Statement) addressed to each selling Holder
     and Underwriter of Registrable Securities, such letters to be in customary
     form and covering matters of the type customarily covered in "cold
     comfort" letters in connection with underwritten offerings, and (iv)
     deliver such documents and certificates as may be reasonably requested by
     the Holders of a majority in principal amount of the Registrable
     Securities being sold or the Underwriters, and which are customarily
     delivered in underwritten offerings, to evidence the continued validity of
     the representations and warranties of the Company made pursuant to clause
     (i) above and to evidence compliance with any customary conditions
     contained in an underwriting agreement.

     In the case of a Shelf Registration Statement, the Company may require
each Holder of Registrable Securities to furnish to the Company such
information regarding the Holder and the proposed distribution by such Holder
of such Registrable Securities as the Company may from time to time reasonably
request in writing. The Company will not have any obligation to include in the
Shelf Registration Statement any Holder that does not deliver such information
to the Company.

     In the case of a Shelf Registration Statement, each Holder agrees that,
upon receipt of any notice from the Company of the happening of any event of
the kind described in Section 3(e)(v) hereof, such Holder will forthwith
discontinue disposition of Registrable Securities pursuant to a Registration
Statement until such Holder's receipt of the copies of the supplemented or
amended Prospectus contemplated by Section 3(i) hereof, and, if so directed by
the Company, such Holder will deliver to the Company (at its expense) all
copies in its possession, other than permanent file copies then in such
Holder's possession, of the Prospectus covering such Registrable Securities
current at the time of receipt of such notice. If the Company shall give any
such notice to suspend the disposition of Registrable Securities pursuant to a
Registration Statement, the Company shall extend the period during which the
Registration Statement shall be maintained effective pursuant to this Agreement
by the number of days during the period from and including the date of the
giving of such notice to and including the date when the Holders shall have
received copies of the supplemented or amended Prospectus necessary to resume
such dispositions. The Company may give any such notice only twice during any
365 day period and any such suspensions may not exceed 30 days for each
suspension and there may not be more than two suspensions in effect during any
365 day period.

     The Holders of Registrable Securities covered by a Shelf Registration
Statement who desire to do so may sell such Registrable Securities in an
Underwritten Offering. In any


                                      11



such Underwritten Offering, the investment banker or investment bankers and
manager or managers (the "Underwriters") that will administer the offering will
be selected by the Majority Holders of the Registrable Securities included in
such offering.

     4. Participation of Broker-Dealers in Exchange Offer.

     (a) The Staff of the SEC has taken the position that any broker-dealer
that receives Exchange Securities for its own account in the Exchange Offer in
exchange for Securities that were acquired by such broker-dealer as a result of
market-making or other trading activities (a "Participating Broker-Dealer"),
may be deemed to be an "underwriter" within the meaning of the 1933 Act and
must deliver a prospectus meeting the requirements of the 1933 Act in
connection with any resale of such Exchange Securities.

     The Company understands that it is the Staff's position that if the
Prospectus contained in the Exchange Offer Registration Statement includes a
plan of distribution containing a statement to the above effect and the means
by which Participating Broker-Dealers may resell the Exchange Securities,
without naming the Participating Broker-Dealers or specifying the amount of
Exchange Securities owned by them, such Prospectus may be delivered by
Participating Broker-Dealers to satisfy their prospectus delivery obligation
under the 1933 Act in connection with resales of Exchange Securities for their
own accounts, so long as the Prospectus otherwise meets the requirements of the
1933 Act.

     (b) In light of the above, notwithstanding the other provisions of this
Agreement, the Company agrees that the provisions of this Agreement as they
relate to a Shelf Registration shall also apply to an Exchange Offer
Registration to the extent, and with such reasonable modifications thereto as
may be, reasonably requested by the Placement Agents or by one or more
Participating Broker-Dealers, in each case as provided in clause (ii) below, in
order to expedite or facilitate the disposition of any Exchange Securities by
Participating Broker-Dealers consistent with the positions of the Staff recited
in Section 4(a) above; provided that:

          (i) the Company shall not be required to amend or supplement the
     Prospectus contained in the Exchange Offer Registration Statement, as
     would otherwise be contemplated by Section 3(i), for a period exceeding
     180 days after the last Exchange Date (as such period may be extended
     pursuant to the penultimate paragraph of Section 3 of this Agreement) and
     Participating Broker-Dealers shall not be authorized by the Company to
     deliver and shall not deliver such Prospectus after such period in
     connection with the resales contemplated by this Section 4; and

          (ii) the application of the Shelf Registration procedures set forth
     in Section 3 of this Agreement to an Exchange Offer Registration, to the
     extent not required by the positions of the Staff of the SEC or the 1933
     Act and the rules and regulations thereunder, will be in conformity with
     the reasonable request to the Company by the Placement Agents or with the
     reasonable request in writing to the Company by one or more broker-dealers
     who certify to the Placement Agents and the Company in writing that they
     anticipate that they will be Participating Broker-Dealers; and provided
     further that, in connection with such application of the Shelf
     Registration procedures set forth in Section 3 to an Exchange Offer
     Registration, the Company shall be obligated (x) to deal only with one


                                      13



     entity representing the Participating Broker-Dealers, which shall be
     Lehman Brothers Inc. unless it elects not to act as such representative,
     (y) to pay the fees and expenses of only one counsel representing the
     Participating Broker-Dealers, which shall be counsel to the Placement
     Agents unless such counsel elects not to so act and (z) to cause to be
     delivered only one, if any, "cold comfort" letter with respect to the
     Prospectus in the form existing on the last Exchange Date and with respect
     to each subsequent amendment or supplement, if any, effected during the
     period specified in clause (i) above.

     (c) The Placement Agents shall have no liability to the Company or any
Holder with respect to any request that it may make pursuant to Section 4(b)
above.

     5. Indemnification and Contribution.

     (a) The Company agrees to indemnify and hold harmless the Placement
Agents, each Holder and each Person, if any, who controls any Placement Agent
or any Holder within the meaning of either Section 15 of the 1933 Act or
Section 20 of the 1934 Act, or is under common control with, or is controlled
by, any Placement Agent or any Holder, from and against all losses, claims,
damages and liabilities (including, without limitation, any legal or other
expenses reasonably incurred by the Placement Agents, any Holder or any such
controlling or affiliated Person in connection with defending or investigating
any such action or claim) caused by any untrue statement or alleged untrue
statement of a material fact contained in any Registration Statement (or any
amendment thereto) pursuant to which Exchange Securities or Registrable
Securities were registered under the 1933 Act, including all documents
incorporated therein by reference, or caused by any omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, or caused by any
untrue statement or alleged untrue statement of a material fact contained in
any Prospectus (as amended or supplemented if the Company shall have furnished
any amendments or supplements thereto), or caused by any omission or alleged
omission to state therein a material fact necessary to make the statements
therein in light of the circumstances under which they were made not
misleading, except insofar as such losses, claims, damages or liabilities are
caused by any such untrue statement or omission or alleged untrue statement or
omission based upon information relating to the Placement Agents or any Holder
furnished to the Company in writing through Lehman Brothers Inc. or ABN AMRO
Incorporated or any selling Holder expressly for use therein. The foregoing
indemnity with respect to any preliminary prospectus shall not inure to the
benefit of any Person (or to the benefit of any person controlling such
person), from whom the party asserting any such losses, claims, damages and
liabilities purchased Registrable Securities or Exchange Securities if a copy
of the Prospectus (as then amended or supplemented) was not sent or given by or
on behalf of such Person to such party, if required by law so to have been
delivered, at or prior to the written confirmation of the sale of such
Registrable Securities or Exchange Securities, as the case may be, to such
party, and if such Prospectus would have cured the defect giving rise to such
losses, claims, damages or liabilities. In connection with any Underwritten
Offering permitted by Section 3, the Company will also indemnify the
Underwriters, if any, selling brokers, dealers and similar securities industry
professionals participating in the distribution, their officers and directors
and each Person who controls such Persons (within the meaning of the 1933 Act
and the 1934 Act) to the same extent as provided above with respect to the
indemnification of the Holders, if requested in connection with any
Registration Statement.

     (b) Each Holder agrees, severally and not jointly, to indemnify and hold
harmless the Company, the Placement Agents and the other selling Holders, and
each of their respective directors, officers who sign the Registration
Statement and each Person, if any, who controls the Company, any Placement
Agent and any other selling Holder within the meaning of either Section 15 of
the 1933 Act or Section 20 of the 1934 Act to the same extent as the foregoing
indemnity from the Company to the Placement Agents and the Holders, but only
with reference to information relating to such Holder furnished to the Company
in writing by such Holder expressly for use in any Registration Statement (or
any amendment thereto) or any Prospectus (or any amendment or supplement
thereto).

     (c) In case any proceeding (including any governmental investigation)
shall be instituted involving any Person in respect of which indemnity may be
sought pursuant to either paragraph (a) or paragraph (b) above, such Person
(the "indemnified party") shall promptly notify the Person against whom such
indemnity may be sought (the "indemnifying party") in writing and the
indemnifying party, upon request of the indemnified party, shall retain counsel
reasonably satisfactory to the indemnified party to represent the indemnified
party and any others the indemnifying party may designate in such proceeding
and shall pay the fees and disbursements of such counsel related to such
proceeding. In any such proceeding, any indemnified party shall have the right
to retain its own counsel, but the fees and expenses of such counsel shall be
at the expense of such indemnified party unless (i) the indemnifying party and
the indemnified party shall have mutually agreed in writing to the retention of
such counsel or (ii) the named parties to any such proceeding (including any
impleaded parties) include both the indemnifying party and the indemnified
party and representation of both parties by the same counsel would be
inappropriate due to actual or potential differing interests between them. It
is understood that the indemnifying party shall not, in connection with any
proceeding or related proceedings in the same jurisdiction, be liable for (a)
the fees and expenses of more than one separate firm (in addition to any local
counsel) for the Placement Agents and all Persons, if any, who control any
Placement Agent within the meaning of either Section 15 of the 1933 Act or
Section 20 of the 1934 Act, (b) the fees and expenses of more than one separate
firm (in addition to any local counsel) for the Company, its directors, its
officers who sign the Registration Statement and each Person, if any, who
controls the Company within the meaning of either such Section and (c) the fees
and expenses of more than one separate firm (in addition to any local counsel)
for all Holders and all Persons, if any, who control any Holders within the
meaning of either such Section, and that all such fees and expenses shall be
reimbursed as they are incurred. In such case involving the Placement Agents
and Persons who control any Placement Agent, such firm shall be designated in
writing by Lehman Brothers Inc. In such case involving the Holders and such
Persons who control Holders, such firm shall be designated in writing by the
Majority Holders. In all other cases, such firm shall be designated by the
Company. The indemnifying party shall not be liable for any settlement of any
proceeding effected without its written consent but, if settled with such
consent or if there be a final judgment for the plaintiff, the indemnifying
party agrees to indemnify the indemnified party from and against any loss or
liability by reason of such settlement or judgment. Notwithstanding the
foregoing sentence, if at any time an indemnified party shall have requested an
indemnifying party to reimburse the indemnified party for fees and expenses of
counsel as contemplated by the second and third sentences of this paragraph,


                                      14



the 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 30 days after receipt by such indemnifying party of the
aforesaid request and (ii) such indemnifying party shall not have reimbursed
the indemnified party for such fees and expenses of counsel in accordance with
such request prior to the date of such settlement. No indemnifying party shall,
without the prior written consent of the 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.

     (d) If the indemnification provided for in paragraph (a) or paragraph (b)
of this Section 5 is unavailable to an indemnified party or insufficient in
respect of any losses, claims, damages or liabilities, then each indemnifying
party under such paragraph, in lieu of indemnifying such indemnified party
thereunder, shall contribute to the amount paid or payable by such indemnified
party as a result of such losses, claims, damages or liabilities in such
proportion as is appropriate to reflect the relative fault of the indemnifying
party or parties on the one hand and of the indemnified party or parties on the
other hand in connection with the statements or omissions that resulted in such
losses, claims, damages or liabilities, as well as any other relevant equitable
considerations. The relative fault of the Company and the Holders shall be
determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to
state a material fact relates to information supplied by the Company or by the
Holders and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The Holders'
respective obligations to contribute pursuant to this Section 5(d) are several
in proportion to the respective principal amount of Registrable Securities of
such Holder that were registered pursuant to a Registration Statement.

     (e) The Company and each Holder agree that it would not be just or
equitable if contribution pursuant to this Section 5 were determined by pro
rata allocation or by any other method of allocation that does not take account
of the equitable considerations referred to in paragraph (d) above. The amount
paid or payable by an indemnified party as a result of the losses, claims,
damages and liabilities referred to in paragraph (d) above shall be deemed to
include, subject to the limitations set forth above, any legal or other
expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim. Notwithstanding the
provisions of this Section 5, no Holder shall be required to indemnify or
contribute any amount in excess of the amount by which the total price at which
Registrable Securities were sold by such Holder exceeds the amount of any
damages that such Holder 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 1933 Act) shall be entitled to contribution from any Person who was not
guilty of such fraudulent misrepresentation. The remedies provided for in this
Section 5 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.

     The indemnity and contribution provisions contained in this Section 5
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


                                      15



the Placement Agents, any Holder or any Person controlling any Placement Agent
or any Holder, or by or on behalf of the Company, its officers or directors or
any Person controlling the Company, (iii) acceptance of any of the Exchange
Securities and (iv) any sale of Registrable Securities pursuant to a Shelf
Registration Statement.

     6. Miscellaneous.

     (a) No Inconsistent Agreements. The Company has not entered into, and on
or after the date of this Agreement will not enter into, any agreement which is
inconsistent with the rights granted to the Holders of Registrable Securities
in this Agreement or otherwise conflicts with the provisions hereof. The rights
granted to the Holders hereunder do not in any way conflict with and are not
inconsistent with the rights granted to the holders of the Company's other
issued and outstanding securities under any such agreements.

     (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 at
least a majority in aggregate principal amount of the outstanding Registrable
Securities affected by such amendment, modification, supplement, waiver or
consent; provided, however, that no amendment, modification, supplement, waiver
or consent to any departure from the provisions of Section 5 hereof shall be
effective as against any Holder of Registrable Securities unless consented to
in writing by such Holder.

     (c) Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand-delivery, registered
first-class mail, telex, telecopier, or any courier guaranteeing overnight
delivery (i) if to a Holder, at the most current address given by such Holder
to the Company by means of a notice given in accordance with the provisions of
this Section 6(c), which address initially is, with respect to the Placement
Agents, the address set forth in the Placement Agreement; and (ii) if to the
Company, initially at the Company's address set forth in the Placement
Agreement and thereafter at such other address, notice of which is given in
accordance with the provisions of this Section 6(c).

     All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; five business
days after being deposited in the mail, postage prepaid, if mailed; when
answered back, if telexed; when receipt is acknowledged, if telecopied; and on
the next business day if timely delivered to an air courier guaranteeing
overnight delivery.

     Copies of all such notices, demands, or other communications shall be
concurrently delivered by the Person giving the same to the Trustee, at the
address specified in the Indenture.

     (d) Successors and Assigns. This Agreement shall inure to the benefit of
and be binding upon the successors, assigns and transferees of each of the
parties, including, without limitation and without the need for an express
assignment, subsequent Holders; provided that nothing herein shall be deemed to
permit any assignment, transfer or other disposition of Registrable Securities
in violation of the terms of the Placement Agreement. If any transferee of any


                                      16



Holder shall acquire Registrable Securities, in any manner, whether by
operation of law or otherwise, such Registrable Securities shall be held
subject to all of the terms of this Agreement, and by taking and holding such
Registrable Securities such Person shall be conclusively deemed to have agreed
to be bound by and to perform all of the terms and provisions of this Agreement
and such Person shall be entitled to receive the benefits hereof. The Placement
Agents (in their capacity as Placement Agents) shall have no liability or
obligation to the Company with respect to any failure by a Holder to comply
with, or any breach by any Holder of, any of the obligations of such Holder
under this Agreement.

     (e) Purchases and Sales of Securities. The Company shall not, and shall
use its reasonable best efforts to cause its affiliates (as defined in Rule 405
under the 1933 Act) not to, purchase and then resell or otherwise transfer any
Securities.

     (f) Third Party Beneficiary. The Holders shall be third party
beneficiaries to the agreements made hereunder between the Company, on the one
hand, and the Placement Agents, on the other hand, and shall have the right to
enforce such agreements directly to the extent it deems such enforcement
necessary or advisable to protect its rights or the rights of Holders
hereunder.

     (g) 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 an original and all of which taken
together shall constitute one and the same agreement.

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

     (i) Governing Law. This Agreement shall be governed by the laws of the
State of New York.

     (j) Severability. In the event that any one or more of the provisions
contained herein, or the application thereof in any circumstance, is held
invalid, illegal or unenforceable, the validity, legality and enforceability of
any such provision in every other respect and of the remaining provisions
contained herein shall not be affected or impaired thereby.


                                      17



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


                                            IPALCO ENTERPRISES, INC.


                                            By  /s/ William H. Henley
                                               ---------------------------------
                                                 Name:  William H. Henley
                                                 Title: President


Confirmed and accepted as of
  the date first above written:

LEHMAN BROTHERS INC.
ABN AMRO INCORPORATED
CIBC WORLD MARKETS CORPORATION
SG COWEN SECURITIES CORPORATION
MERRILL LYNCH, PIERCE, FENNER & SMITH
    INCORPORATED
UBS WARBURG LLC


By: LEHMAN BROTHERS INC.


By: /s/ Greg Hall
   ---------------------------
   Name:  Greg Hall
   Title: Managing Director







                                      18