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                                                                     EXHIBIT 4.5

                                   $50,000,000

                     The Peoples Gas Light and Coke Company

                 First and Refunding Mortgage Bonds, Series MM-1

                                Due March 1, 2010

                          REGISTRATION RIGHTS AGREEMENT

                                                               February 19, 2003


Banc One Capital Markets, Inc.
1 Bank One Plaza
Suite IL1-0595
Chicago, IL  60670

Ladies and Gentlemen:

     The Peoples Gas Light and Coke Company, an Illinois corporation (the
"COMPANY"), proposes to issue and sell to Banc One Capital Markets, Inc. (the
"INITIAL PURCHASER"), upon the terms set forth in a purchase agreement of even
date herewith (the "PURCHASE AGREEMENT"), $50,000,000 aggregate principal amount
of its First and Refunding Mortgage Bonds, Series MM-I due March 1, 2010 (the
"INITIAL SECURITIES"). The Initial Securities will be issued under the Mortgage,
dated January 2, 1926, from Chicago By-Product Coke Company to Illinois
Merchants Trust Company (succeeded through consolidation, merger or sale by U.S.
Bank, National Association), as Trustee (the "TRUSTEE"), which Mortgage was
assumed by the Company by Indenture, dated March 1, 1928, and has heretofore
been amended and supplemented by various supplemental indentures thereto,
including the Supplemental Indenture dated as of February 15, 2003 providing for
the issuance of the Initial Securities (the "SUPPLEMENTAL INDENTURE"). As used
herein, "MORTGAGE" shall mean such Mortgage as heretofore amended and
supplemented, including the Supplemental Indenture. As an inducement to the
Initial Purchaser to enter into the Purchase Agreement, the Company agrees with
the Initial Purchaser, for the benefit of the Initial Purchaser and the holders
of the Securities (as defined below) (collectively the "HOLDERS"), as follows:

     1.  REGISTERED EXCHANGE OFFER. Unless not permitted by applicable law
(after the Company has complied with the ultimate paragraph of this Section 1)
or the policy of the Securities and Exchange Commission (the "COMMISSION"), the
Company shall prepare and, not later than 60 days (such 60th day being a "FILING
DEADLINE") after the date on which the Initial Purchaser purchases the Initial
Securities pursuant to the Purchase Agreement (the "CLOSING

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DATE"), file with the Commission a registration statement (the "EXCHANGE OFFER
REGISTRATION STATEMENT") on an appropriate form under the Securities Act of
1933, as amended (the "SECURITIES ACT"), with respect to a proposed offer (the
"REGISTERED EXCHANGE OFFER") to the Holders of Transfer Restricted Securities
(as defined in Section 6 hereof), who are not prohibited by any law or policy of
the Commission from participating in the Registered Exchange Offer, to issue and
deliver to such Holders, in exchange for the Initial Securities, a like
aggregate principal amount of debt securities of the Company issued under the
Mortgage, identical in all material respects to the Initial Securities and
registered under the Securities Act (the "EXCHANGE SECURITIES"). The Company
shall use its reasonable best efforts to (i) cause such Exchange Offer
Registration Statement to become effective under the Securities Act within 200
days after the Closing Date (such 200th day being an "EFFECTIVENESS DEADLINE")
and (ii) keep the Exchange Offer Registration Statement effective for not less
than 30 days (or longer, if required by applicable law) after the date notice of
the Registered Exchange Offer is mailed to the Holders (such period being called
the "EXCHANGE OFFER REGISTRATION PERIOD").

     If the Company commences the Registered Exchange Offer, the Company (i)
will be entitled to consummate the Registered Exchange Offer 30 days after such
commencement (PROVIDED that the Company has accepted all the Initial Securities
theretofore validly tendered in accordance with the terms of the Registered
Exchange Offer) and (ii) will be required to consummate the Registered Exchange
Offer no later than 40 days after the date on which the Exchange Offer
Registration Statement is declared effective (such 40th day being the
"CONSUMMATION DEADLINE").

     Following the declaration of the effectiveness of the Exchange Offer
Registration Statement, the Company shall promptly commence the Registered
Exchange Offer, it being the objective of such Registered Exchange Offer to
enable each Holder of Transfer Restricted Securities electing to exchange the
Initial Securities for Exchange Securities (assuming that such Holder is not an
affiliate of the Company within the meaning of the Securities Act, acquires the
Exchange Securities in the ordinary course of such Holder's business and has no
arrangements with any person to participate in the distribution of the Exchange
Securities and is not prohibited by any law or policy of the Commission from
participating in the Registered Exchange Offer) to trade such Exchange
Securities from and after their receipt without any limitations or restrictions
under the Securities Act and without material restrictions under the securities
laws of the several states of the United States.

     The Company acknowledges that, pursuant to current interpretations by the
Commission's staff of Section 5 of the Securities Act, in the absence of an
applicable exemption therefrom, (i) each Holder which is a broker-dealer
electing to exchange Initial Securities, acquired for its own account as a
result of market making activities or other trading activities, for Exchange
Securities (an "EXCHANGING DEALER"), is required to deliver a prospectus
containing the information set forth in (a) Annex A hereto on the cover, (b)
Annex B hereto in the "Exchange Offer Procedures" section and the "Purpose of
the Exchange Offer" section, and (c) Annex C hereto in the "Plan of
Distribution" section of such prospectus in connection with a sale of any such
Exchange Securities received by such Exchanging Dealer pursuant to the
Registered Exchange Offer and (ii) the Initial Purchaser that elects to sell
Securities (as defined below) acquired in exchange for Initial Securities
constituting any portion of an unsold

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allotment, is required to deliver a prospectus containing the information
required by Items 507 or 508 of Regulation S-K under the Securities Act, as
applicable, in connection with such sale.

     The Company shall use its reasonable best efforts to keep the Exchange
Offer Registration Statement effective and to amend and supplement the
prospectus contained therein, in order to permit such prospectus to be lawfully
delivered by all persons subject to the prospectus delivery requirements of the
Securities Act for such period of time as such persons must comply with such
requirements in order to resell the Exchange Securities; PROVIDED, HOWEVER, that
(i) in the case where such prospectus and any amendment or supplement thereto
must be delivered by an Exchanging Dealer or the Initial Purchaser, such period
shall be the lesser of 180 days and the date on which all Exchanging Dealers and
the Initial Purchaser have sold all Exchange Securities held by them (unless
such period is extended pursuant to Section 3(j) below) and (ii) the Company
shall make such prospectus and any amendment or supplement thereto available to
any broker-dealer for use in connection with any resale of any Exchange
Securities for a period of not less than 180 days after the consummation of the
Registered Exchange Offer.

     If, upon consummation of the Registered Exchange Offer, the Initial
Purchaser holds Initial Securities acquired by it as part of its initial
distribution, the Company, simultaneously with the delivery of the Exchange
Securities pursuant to the Registered Exchange Offer, shall issue and deliver to
the Initial Purchaser upon the written request of the Initial Purchaser, in
exchange (the "PRIVATE EXCHANGE") for the Initial Securities held by the Initial
Purchaser, a like principal amount of debt securities of the Company issued
under the Mortgage and identical in all material respects to the Initial
Securities (the "PRIVATE EXCHANGE SECURITIES"). The Initial Securities, the
Exchange Securities and the Private Exchange Securities are herein collectively
called the "SECURITIES."

     In connection with the Registered Exchange Offer, the Company shall:

          (a)  mail to each Holder a copy of the prospectus forming part of the
     Exchange Offer Registration Statement, together with an appropriate letter
     of transmittal and related documents;

          (b)  keep the Registered Exchange Offer open for not less than 30 days
     (or longer, if required by applicable law) after the date notice thereof is
     mailed to the Holders;

          (c)  utilize the services of a depositary for the Registered Exchange
     Offer with an address in the Borough of Manhattan, The City of New York,
     which may be the Trustee or an affiliate of the Trustee;

          (d)  permit Holders to withdraw tendered Securities at any time prior
     to the close of business, New York time, on the last business day on which
     the Registered Exchange Offer shall remain open; and

          (e)  otherwise comply with all applicable laws.

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     As soon as practicable after the close of the Registered Exchange Offer or
the Private Exchange, as the case may be, the Company shall:

          (x)  accept for exchange all the Securities validly tendered and not
     withdrawn pursuant to the Registered Exchange Offer and the Private
     Exchange;

          (y)  deliver to the Trustee for cancellation all the Initial
     Securities so accepted for exchange; and

          (z)  cause the Trustee to authenticate and deliver promptly to each
     Holder of the Initial Securities, Exchange Securities or Private Exchange
     Securities, as the case may be, equal in principal amount to the Initial
     Securities of such Holder so accepted for exchange.

     The Mortgage will provide that the Exchange Securities will not be subject
to the transfer restrictions set forth in the Mortgage and that all the
Securities will vote and consent together on all matters as one class and that
none of the Securities will have the right to vote or consent as a class
separate from one another on any matter.

     Interest on each Exchange Security and Private Exchange Security issued
pursuant to the Registered Exchange Offer and in the Private Exchange will
accrue from the last interest payment date on which interest was paid on the
Initial Securities surrendered in exchange therefor or, if no interest has been
paid on the Initial Securities, from the date of original issue of the Initial
Securities.

     Each Holder participating in the Registered Exchange Offer shall be
required to represent to the Company that at the time of the consummation of the
Registered Exchange Offer (i) any Exchange Securities received by such Holder
will be acquired in the ordinary course of business, (ii) such Holder will have
no arrangements or understanding with any person to participate in the
distribution of the Securities or the Exchange Securities within the meaning of
the Securities Act, (iii) such Holder is not an "affiliate," as defined in Rule
405 of the Securities Act, of the Company or if it is an affiliate, such Holder
will comply with the registration and prospectus delivery requirements of the
Securities Act to the extent applicable, (iv) if such Holder is not a
broker-dealer, that it is not engaged in, and does not intend to engage in, the
distribution of the Exchange Securities and (v) if such Holder is a
broker-dealer, that it will receive Exchange Securities for its own account in
exchange for Initial Securities that were acquired as a result of market-making
activities or other trading activities and that it will be required to
acknowledge that it will deliver a prospectus in connection with any resale of
such Exchange Securities.

     Notwithstanding any other provisions hereof, the Company will ensure that
(i) any Exchange Offer Registration Statement and any amendment thereto and any
prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations
thereunder, (ii) any Exchange Offer Registration Statement and any amendment
thereto does not, when it becomes effective, contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading and (iii) any prospectus
forming part of any Exchange Offer

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Registration Statement, and any supplement to such prospectus, does not include
an untrue statement of a material fact or omit to state a material fact required
to be stated therein or necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading.

     If following the date hereof there has been announced a change in
Commission policy with respect to exchange offers that in the reasonable opinion
of counsel to the Company raises a substantial question as to whether the
Registered Exchange Offer is permitted by applicable federal law, the Company
will seek a no-action letter or other favorable decision from the Commission
allowing the Company to consummate the Registered Exchange Offer. The Company
will pursue the issuance of such a decision to the Commission staff level. In
connection with the foregoing, the Company will take all such other actions as
may be requested by the Commission or otherwise required in connection with the
issuance of such decision, including without limitation (i) participating in
telephonic conferences with the Commission, (ii) delivering to the Commission
staff an analysis prepared by counsel to the Company setting forth the legal
bases, if any, upon which such counsel has concluded that the Registered
Exchange Offer should be permitted and (iii) diligently pursuing a resolution
(which need not be favorable) by the Commission staff.

     2.  SHELF REGISTRATION. If, (i) because of any change in law or in
applicable interpretations thereof by the staff of the Commission, the Company
is not permitted to effect a Registered Exchange Offer, as contemplated by
Section 1 hereof, (ii) the Registered Exchange Offer is not consummated by the
240th day after the Closing Date, (iii) the Initial Purchaser so requests with
respect to the Initial Securities (or the Private Exchange Securities) not
eligible to be exchanged for Exchange Securities in the Registered Exchange
Offer and held by it following consummation of the Registered Exchange Offer or
(iv) any Holder (other than an Exchanging Dealer) is not eligible to participate
in the Registered Exchange Offer or, in the case of any Holder (other than an
Exchanging Dealer) that participates in the Registered Exchange Offer, such
Holder does not receive freely tradeable Exchange Securities on the date of the
exchange and any such Holder so requests, the Company shall take the following
actions (the date on which any of the conditions described in the foregoing
clauses (i) through (iv) occur, including in the case of clauses (iii) or (iv)
the receipt of the required notice, being a "TRIGGER DATE"):

          (a)  The Company shall promptly (but in no event more than 60 days
     after the Trigger Date (such 60th day being a "FILING DEADLINE")) file with
     the Commission and thereafter use its reasonable best efforts to cause to
     be declared effective no later than 180 days after the Trigger Date (such
     180th day being an "EFFECTIVENESS DEADLINE") a registration statement (the
     "SHELF REGISTRATION STATEMENT" and, together with the Exchange Offer
     Registration Statement, a "REGISTRATION STATEMENT") on an appropriate form
     under the Securities Act relating to the offer and sale of the Transfer
     Restricted Securities by the Holders thereof from time to time in
     accordance with the methods of distribution set forth in the Shelf
     Registration Statement and Rule 415 under the Securities Act (hereinafter,
     the "SHELF REGISTRATION"); PROVIDED, HOWEVER, that no Holder (other than
     the Initial Purchaser) shall be entitled to have the Securities held by it
     covered by such Shelf Registration Statement unless such Holder agrees in
     writing to be bound by all the provisions of this Agreement applicable to
     such Holder.

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          (b)  The Company shall use its reasonable best efforts to keep the
     Shelf Registration Statement continuously effective in order to permit the
     prospectus included therein to be lawfully delivered by the Holders of the
     relevant Securities, for a period (the "SHELF REGISTRATION PERIOD") of two
     years (or for such longer period if extended pursuant to Section 3(j)
     below) from the date of its effectiveness or such shorter period that will
     terminate when all the Securities covered by the Shelf Registration
     Statement (i) have been sold pursuant thereto or (ii) are no longer
     restricted securities (as defined in Rule 144 under the Securities Act, or
     any successor rule thereof). The Company shall be deemed not to have used
     its reasonable best efforts to keep the Shelf Registration Statement
     effective during the requisite period if it voluntarily takes any action
     that would result in Holders of Securities covered thereby not being able
     to offer and sell such Securities during that period, unless such action is
     required by applicable law, rules, regulations or administrative or
     judicial order.

          (c)  Notwithstanding any other provisions of this Agreement to the
     contrary, the Company shall cause the Shelf Registration Statement and the
     related prospectus and any amendment or supplement thereto, as of the
     effective date of the Shelf Registration Statement, amendment or
     supplement, (i) to comply in all material respects with the applicable
     requirements of the Securities Act and the rules and regulations of the
     Commission and (ii) not to contain any untrue statement of a material fact
     or omit to state a material fact required to be stated therein or necessary
     in order to make the statements therein, in light of the circumstances
     under which they were made, not misleading.

     3.  REGISTRATION PROCEDURES. In connection with any Shelf Registration
contemplated by Section 2 hereof and, to the extent applicable, any Registered
Exchange Offer contemplated by Section 1 hereof, the following provisions shall
apply:

          (a)  The Company shall (i) furnish to the Initial Purchaser, prior to
     the filing thereof with the Commission, a copy of the Registration
     Statement and each amendment thereof and each supplement, if any, to the
     prospectus included therein and, in the event that the Initial Purchaser
     (with respect to any portion of an unsold allotment from the original
     offering) is participating in the Registered Exchange Offer or the Shelf
     Registration Statement, the Company shall use its reasonable best efforts
     to reflect in each such document, when so filed with the Commission, such
     comments as the Initial Purchaser reasonably may propose; (ii) include the
     information set forth in Annex A hereto on the cover, in Annex B hereto in
     the "Exchange Offer Procedures" section and the "Purpose of the Exchange
     Offer" section and in Annex C hereto in the "Plan of Distribution" section
     of the prospectus forming a part of the Exchange Offer Registration
     Statement and include the information set forth in Annex D hereto in the
     Letter of Transmittal delivered pursuant to the Registered Exchange Offer;
     (iii) if requested by the Initial Purchaser, include the information
     required by Item 507 or 508 of Regulation S-K under the Securities Act, as
     applicable, in the prospectus forming a part of the Exchange Offer
     Registration Statement; (iv) include within the prospectus contained in the
     Exchange Offer Registration Statement a section entitled "Plan of
     Distribution," reasonably acceptable to the Initial Purchaser, which shall
     contain a summary statement of the positions taken or policies made by the
     staff of the Commission with respect to the

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     potential "underwriter" status of any broker-dealer that is the beneficial
     owner (as defined in Rule 13d-3 under the Securities Exchange Act of 1934,
     as amended (the "EXCHANGE ACT")) of Exchange Securities received by such
     broker-dealer in the Registered Exchange Offer (a "PARTICIPATING
     BROKER-DEALER"), whether such positions or policies have been publicly
     disseminated by the staff of the Commission or such positions or policies,
     in the reasonable judgment of the Initial Purchaser based upon advice of
     counsel (which may be in-house counsel), represent the prevailing views of
     the staff of the Commission; and (v) in the case of a Shelf Registration
     Statement, include the names of the Holders who propose to sell Securities
     pursuant to the Shelf Registration Statement as selling securityholders.

          (b)  The Company shall give written notice to the Initial Purchaser,
     the Holders of the Securities and any Participating Broker-Dealer from whom
     the Company has received prior written notice that it will be a
     Participating Broker-Dealer in the Registered Exchange Offer (which notice
     pursuant to clauses (ii)-(v) hereof shall be accompanied by an instruction
     to suspend the use of the prospectus until the requisite changes have been
     made):

                (i)   when the Registration Statement or any amendment thereto
          has been filed with the Commission and when the Registration Statement
          or any post-effective amendment thereto has become effective;

               (ii)   of any request by the Commission for amendments or
          supplements to the Registration Statement or the prospectus included
          therein or for additional information;

              (iii)   of the issuance by the Commission of any stop order
          suspending the effectiveness of the Registration Statement or the
          initiation 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 of
          the Securities for sale in any jurisdiction or the initiation or
          threatening of any proceeding for such purpose; and

                (v)   of the happening of any event that requires the Company to
          make changes in the Registration Statement or the prospectus in order
          that the Registration Statement or the prospectus do not contain an
          untrue statement of a material fact nor omit to state a material fact
          required to be stated therein or necessary to make the statements
          therein (in the case of the prospectus, in light of the circumstances
          under which they were made) not misleading.

          (c)  The Company shall use its reasonable best efforts to obtain the
     withdrawal at the earliest possible time, of any order suspending the
     effectiveness of the Registration Statement.

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          (d)  The Company shall furnish to each Holder of Securities included
     within the coverage of the Shelf Registration, without charge, at least one
     copy of the Shelf Registration Statement and any post-effective amendment
     thereto, including financial statements and schedules, and, if the Holder
     so requests in writing, all exhibits thereto (including those, if any,
     incorporated by reference).

          (e)  The Company shall deliver to each Exchanging Dealer and the
     Initial Purchaser, and to any other Holder who so requests, without charge,
     at least one copy of the Exchange Offer Registration Statement and any
     post-effective amendment thereto, including financial statements and
     schedules, and, if the Initial Purchaser or any such Holder requests, all
     exhibits thereto (including those incorporated by reference).

          (f)  The Company shall, during the Shelf Registration Period, deliver
     to each Holder of Securities included within the coverage of the Shelf
     Registration, without charge, as many copies of the prospectus (including
     each preliminary prospectus) included in the Shelf Registration Statement
     and any amendment or supplement thereto as such person may reasonably
     request. The Company consents, subject to the provisions of this Agreement,
     to the use of the prospectus or any amendment or supplement thereto by each
     of the selling Holders of the Securities in connection with the offering
     and sale of the Securities covered by the prospectus, or any amendment or
     supplement thereto, included in the Shelf Registration Statement.

          (g)  The Company shall deliver to the Initial Purchaser, any
     Exchanging Dealer, any Participating Broker-Dealer and such other persons
     required to deliver a prospectus following the Registered Exchange Offer,
     without charge, as many copies of the final prospectus included in the
     Exchange Offer Registration Statement and any amendment or supplement
     thereto as such persons may reasonably request. The Company consents,
     subject to the provisions of this Agreement, to the use of the prospectus
     or any amendment or supplement thereto by the Initial Purchaser, if
     necessary, any Participating Broker-Dealer and such other persons required
     to deliver a prospectus following the Registered Exchange Offer in
     connection with the offering and sale of the Exchange Securities covered by
     the prospectus, or any amendment or supplement thereto, included in such
     Exchange Offer Registration Statement.

          (h)  Prior to any public offering of the Securities pursuant to any
     Registration Statement the Company shall register or qualify or cooperate
     with the Holders of the Securities included therein and their respective
     counsel in connection with the registration or qualification of the
     Securities for offer and sale under the securities or "blue sky" laws of
     such states of the United States as any Holder of the Securities reasonably
     requests in writing and do any and all other acts or things necessary or
     advisable to enable the offer and sale in such jurisdictions of the
     Securities covered by such Registration Statement; PROVIDED, HOWEVER, that
     the Company shall not be required to (i) qualify generally to do business
     in any jurisdiction where it is not then so qualified or (ii) take any
     action which would subject it to general service of process or to taxation
     in any jurisdiction where it is not then so subject.

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          (i)  The Company shall cooperate with the Holders of the Securities to
     facilitate the timely preparation and delivery of certificates representing
     the Securities to be sold pursuant to any Registration Statement free of
     any restrictive legends and in such denominations and registered in such
     names as the Holders may request a reasonable period of time prior to sales
     of the Securities pursuant to such Registration Statement.

          (j)  Upon the occurrence of any event contemplated by paragraphs (ii)
     through (v) of Section 3(b) above during the period for which the Company
     is required to maintain an effective Registration Statement, the Company
     shall promptly prepare and file a post-effective amendment to the
     Registration Statement or a supplement to the related prospectus and any
     other required document so that, as thereafter delivered to Holders of the
     Securities or purchasers of Securities, the prospectus will not contain an
     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,
     in light of the circumstances under which they were made, not misleading.
     If the Company notifies the Initial Purchaser, the Holders of the
     Securities and any known Participating Broker-Dealer in accordance with
     paragraphs (ii) through (v) of Section 3(b) above to suspend the use of the
     prospectus until the requisite changes to the prospectus have been made,
     then the Initial Purchaser, the Holders of the Securities and any such
     Participating Broker-Dealers shall suspend use of such prospectus, and the
     period of effectiveness of the Shelf Registration Statement provided for in
     Section 2(b) above and the Exchange Offer Registration Statement provided
     for in Section 1 above shall each be extended by the number of days from
     and including the date of the giving of such notice to and including the
     date when the Initial Purchaser, the Holders of the Securities and any
     known Participating Broker-Dealer shall have received such amended or
     supplemented prospectus pursuant to this Section 3(j).

          (k)  Not later than the effective date of the applicable Registration
     Statement, the Company will provide a CUSIP number for the Initial
     Securities, the Exchange Securities or the Private Exchange Securities, as
     the case may be, and provide the applicable trustee with printed
     certificates for the Initial Securities, the Exchange Securities or the
     Private Exchange Securities, as the case may be, in a form eligible for
     deposit with The Depository Trust Company.

          (l)  The Company will comply with all rules and regulations of the
     Commission to the extent and so long as they are applicable to the
     Registered Exchange Offer or the Shelf Registration and will make generally
     available to its security holders (or otherwise provide in accordance with
     Section 11(a) of the Securities Act) an earnings statement satisfying the
     provisions of Section 11(a) of the Securities Act, no later than 45 days
     after the end of a 12-month period (or 90 days, if such period is a fiscal
     year) beginning with the first month of the Company's first fiscal quarter
     commencing after the effective date of the Registration Statement, which
     statement shall cover such 12-month period.

          (m)  The Company shall cause the Mortgage to be qualified under the
     Trust Indenture Act of 1939, as amended, in a timely manner and containing
     such changes, if any, as shall be necessary for such qualification. In the
     event that such qualification

                                       -9-
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     would require the appointment of a new trustee under the Mortgage, the
     Company shall appoint a new trustee thereunder pursuant to the applicable
     provisions of the Mortgage.

          (n)  The Company may require each Holder of Securities to be sold
     pursuant to the Shelf Registration Statement to furnish to the Company such
     information regarding the Holder and the distribution of the Securities as
     the Company may from time to time reasonably require for inclusion in the
     Shelf Registration Statement, and the Company may exclude from such
     registration the Securities of any Holder that unreasonably fails to
     furnish such information within a reasonable time after receiving such
     request.

          (o)  The Company shall enter into such customary agreements
     (including, if requested, an underwriting agreement in customary form) and
     take all such other action, if any, as any Holder of the Securities shall
     reasonably request in order to facilitate the disposition of the Securities
     pursuant to any Shelf Registration.

          (p)  In the case of any Shelf Registration, the Company shall (i) make
     reasonably available for inspection by the Holders of the Securities, any
     underwriter participating in any disposition pursuant to the Shelf
     Registration Statement and any attorney, accountant or other agent retained
     by the Holders of the Securities or any such underwriter all relevant
     financial and other records, pertinent corporate documents and properties
     of the Company and (ii) cause the Company's officers, directors, employees,
     accountants and auditors to supply all relevant information reasonably
     requested by the Holders of the Securities or any such underwriter,
     attorney, accountant or agent in connection with the Shelf Registration
     Statement, in each case, as shall be reasonably necessary to enable such
     persons, to conduct a reasonable investigation within the meaning of
     Section 11 of the Securities Act; PROVIDED, HOWEVER, that the foregoing
     inspection and information gathering shall be coordinated by you as the
     Initial Purchaser and on behalf of the other parties, by one counsel
     designated by and on behalf of such other parties as described in Section 4
     hereof.

          (q)  In the case of any Shelf Registration, the Company, if requested
     by any Holder of Securities covered thereby, shall cause (i) its counsel to
     deliver an opinion and updates thereof relating to the Securities in
     customary form addressed to such Holders and the managing underwriters, if
     any, thereof and dated, in the case of the initial opinion, the effective
     date of such Shelf Registration Statement (it being agreed that the matters
     to be covered by such opinion shall include, without limitation, the due
     incorporation and good standing of the Company and its subsidiaries; the
     qualification of the Company and its subsidiaries to transact business as
     foreign corporations; the due authorization, execution and delivery of the
     relevant agreement of the type referred to in Section 3(o) hereof; the due
     authorization, execution, authentication and issuance, and the validity and
     enforceability, of the applicable Securities; the absence of material legal
     or governmental proceedings involving the Company and its subsidiaries,
     other than as set forth in the Shelf Registration Statement or the
     documents incorporated by reference therein; the absence of governmental
     approvals required to be obtained in connection with the Shelf Registration
     Statement, the offering and sale of the applicable Securities, or any
     agreement of the type referred to in Section 3(o) hereof; the compliance as
     to form

                                      -10-
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     of such Shelf Registration Statement and any documents incorporated by
     reference therein and of the Mortgage with the requirements of the
     Securities Act and the Trust Indenture Act, respectively; and, as of the
     date of the opinion and as of the effective date of the Shelf Registration
     Statement or most recent post-effective amendment thereto, as the case may
     be, the absence from such Shelf Registration Statement and the prospectus
     included therein, as then amended or supplemented, and from any documents
     incorporated by reference therein of an untrue statement of a material fact
     or the omission to state therein a material fact required to be stated
     therein or necessary to make the statements therein not misleading (in the
     case of any such documents, in the light of the circumstances existing at
     the time that such documents were filed with the Commission under the
     Exchange Act)); (ii) its officers to execute and deliver all customary
     documents and certificates and updates thereof requested by any
     underwriters of the applicable Securities; and (iii) its independent public
     accountants to provide to the selling Holders of the applicable Securities
     and any underwriter therefor a comfort letter in customary form and
     covering matters of the type customarily covered in comfort letters in
     connection with primary underwritten offerings, subject to receipt of
     appropriate documentation as contemplated, and only if permitted, by
     Statement of Auditing Standards No. 72.

          (r)  In the case of the Registered Exchange Offer, if requested by the
     Initial Purchaser or any known Participating Broker-Dealer, the Company
     shall cause (i) its counsel to deliver to the Initial Purchaser or such
     Participating Broker-Dealer a signed opinion in the form set forth in
     Section 6(b) of the Purchase Agreement with such changes as are customary
     in connection with the preparation of a Registration Statement and (ii) its
     independent public accountants to deliver to the Initial Purchaser or such
     Participating Broker-Dealer a comfort letter, in customary form, meeting
     the requirements as to the substance thereof as set forth in Section 6(e)
     of the Purchase Agreement, with appropriate date changes.

          (s)  If a Registered Exchange Offer or a Private Exchange is to be
     consummated, upon delivery of the Initial Securities by Holders to the
     Company (or to such other Person as directed by the Company) in exchange
     for the Exchange Securities or the Private Exchange Securities, as the case
     may be, the Company shall mark, or caused to be marked, on the Initial
     Securities so exchanged that such Initial Securities are being canceled in
     exchange for the Exchange Securities or the Private Exchange Securities, as
     the case may be; in no event shall the Initial Securities be marked as paid
     or otherwise satisfied.

          (t)  The Company will use its reasonable best efforts to (a) if the
     Initial Securities have been rated prior to the initial sale of such
     Initial Securities, confirm such ratings will apply to the Securities
     covered by a Registration Statement, or (b) if the Initial Securities were
     not previously rated, cause the Securities covered by a Registration
     Statement to be rated with the appropriate rating agencies, if so requested
     by Holders of a majority in aggregate principal amount of Securities
     covered by such Registration Statement, or by the managing underwriters, if
     any.

                                      -11-
<Page>

          (u)  In the event that any broker-dealer registered under the Exchange
     Act shall underwrite any Securities or participate as a member of an
     underwriting syndicate or selling group or "assist in the distribution"
     (within the meaning of the Conduct Rules (the "RULES") of the National
     Association of Securities Dealers, Inc. ("NASD")) thereof, whether as a
     Holder of such 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 Rules,
     including, without limitation, by (i) if such Rules, including Rule 2720,
     shall so require, engaging a "qualified independent underwriter" (as
     defined in Rule 2720) to participate in the preparation of the Registration
     Statement relating to such Securities, to exercise usual standards of due
     diligence in respect thereto and, if any portion of the offering
     contemplated by such Registration Statement is an underwritten offering or
     is made through a placement or sales agent, to recommend the yield of such
     Securities, (ii) indemnifying any such qualified independent underwriter to
     the extent of the indemnification of underwriters provided in Section 5
     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 Rules.

          (v)  The Company shall use its reasonable best efforts to take all
     other steps necessary to effect the registration of the Securities covered
     by a Registration Statement contemplated hereby.

     4.  REGISTRATION EXPENSES. (a) All expenses incident to the Company's
performance of and compliance with this Agreement will be borne by the Company,
regardless of whether a Registration Statement is ever filed or becomes
effective, including without limitation;

            (i)   all registration and filing fees and expenses;

           (ii)   all fees and expenses of compliance with federal securities
     and state "blue sky" or securities laws;

          (iii)   all expenses of printing (including printing certificates for
     the Securities to be issued in the Registered Exchange Offer and the
     Private Exchange and printing of Prospectuses), messenger and delivery
     services and telephone;

           (iv)   all fees and disbursements of counsel for the Company;

            (v)   all application and filing fees in connection with listing the
     Exchange Securities on a national securities exchange or automated
     quotation system pursuant to the requirements hereof; and

           (vi)   all fees and disbursements of independent certified public
     accountants of the Company (including the expenses of any special audit and
     comfort letters required by or incident to such performance).

                                      -12-
<Page>

     The Company will bear its internal expenses (including, without limitation,
all salaries and expenses of its officers and employees performing legal or
accounting duties), the expenses of any annual audit and the fees and expenses
of any person, including special experts, retained by the Company.

     (b)  In connection with any Registration Statement required by this
Agreement, the Company will reimburse the Initial Purchaser and the Holders of
Transfer Restricted Securities who are tendering Initial Securities in the
Registered Exchange Offer and/or selling or reselling Securities pursuant to the
"Plan of Distribution" contained in the Exchange Offer Registration Statement or
the Shelf Registration Statement, as applicable, for the reasonable fees and
disbursements of not more than one counsel, who shall be Chapman and Cutler,
unless another firm shall be chosen by the Holders of a majority in principal
amount of the Transfer Restricted Securities for whose benefit such Registration
Statement is being prepared.

     5.  INDEMNIFICATION. (a) The Company agrees to indemnify and hold harmless
each Holder of the Securities, any Participating Broker-Dealer and each person,
if any, who controls such Holder or such Participating Broker-Dealer within the
meaning of the Securities Act or the Exchange Act (each Holder, any
Participating Broker-Dealer and such controlling persons are referred to
collectively as the "INDEMNIFIED PARTIES") from and against any losses, claims,
damages or liabilities, joint or several, or any actions in respect thereof
(including, but not limited to, any losses, claims, damages, liabilities or
actions relating to purchases and sales of the Securities) to which each
Indemnified Party may become subject under the Securities Act, the Exchange Act
or otherwise, insofar as such losses, claims, damages, liabilities or actions
arise out of or are based upon any untrue statement or alleged untrue statement
of a material fact contained in a Registration Statement or prospectus or in any
amendment or supplement thereto or in any preliminary prospectus relating to a
Shelf Registration, or arise out of, or are based upon, the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, and shall reimburse, as
incurred, the Indemnified Parties for any reasonable legal fees or other
expenses reasonably incurred by them in connection with investigating or
defending any such loss, claim, damage, liability or action in respect thereof;
PROVIDED, HOWEVER, that (i) the Company shall not be liable in any such case to
the extent that such loss, claim, damage or liability arises out of or is based
upon any untrue statement or alleged untrue statement or omission or alleged
omission made in a Registration Statement or prospectus or in any amendment or
supplement thereto or in any preliminary prospectus relating to a Shelf
Registration in reliance upon and in conformity with written information
pertaining to such Holder and furnished to the Company by or on behalf of such
Holder specifically for inclusion therein and (ii) with respect to any untrue
statement or omission or alleged untrue statement or omission made in any
preliminary prospectus relating to a Shelf Registration Statement, the indemnity
agreement contained in this subsection (a) shall not inure to the benefit of any
Holder or Participating Broker-Dealer from whom the person asserting any such
losses, claims, damages or liabilities purchased the Securities concerned, to
the extent that a prospectus relating to such Securities was required to be
delivered by such Holder or Participating Broker-Dealer under the Securities Act
in connection with such purchase and any such loss, claim, damage or liability
of such Holder or Participating Broker-Dealer results from the fact that there
was not sent or given to such person, at or prior to the written confirmation of
the sale of such Securities to such person, a copy of the final prospectus if
the Company had

                                      -13-
<Page>

previously furnished copies thereof to such Holder or Participating
Broker-Dealer; PROVIDED FURTHER, HOWEVER, that this indemnity agreement will be
in addition to any liability which the Company may otherwise have to such
Indemnified Party. The Company shall also indemnify underwriters, their officers
and directors and each person who controls such underwriters within the meaning
of the Securities Act or the Exchange Act to the same extent as provided above
with respect to the indemnification of the Holders of the Securities if
requested by such Holders.

     (b)  Each Holder of the Securities, severally and not jointly, will
indemnify and hold harmless the Company and each person, if any, who controls
the Company within the meaning of the Securities Act or the Exchange Act from
and against any losses, claims, damages or liabilities or any actions in respect
thereof, to which the Company or any such controlling person may become subject
under the Securities Act, the Exchange Act or otherwise, insofar as such losses,
claims, damages, liabilities or actions arise out of or are based upon any
untrue statement or alleged untrue statement of a material fact contained in a
Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to a Shelf Registration, or arise out
of or are based upon the omission or alleged omission to state therein a
material fact necessary to make the statements therein not misleading, but in
each case only to the extent that the untrue statement or omission or alleged
untrue statement or omission was made in reliance upon and in conformity with
written information pertaining to such Holder and furnished to the Company by or
on behalf of such Holder specifically for inclusion therein; and, subject to the
limitation set forth immediately preceding this clause, shall reimburse, as
incurred, the Company for any legal or other expenses reasonably incurred by the
Company or any such controlling person in connection with investigating or
defending any loss, claim, damage, liability 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 of its controlling persons.

     (c)  Promptly after receipt by an indemnified party under this Section 5 of
notice of the commencement of any action or proceeding (including a governmental
investigation), such indemnified party will, if a claim in respect thereof is to
be made against the indemnifying party under this Section 5, notify the
indemnifying party of the commencement thereof; but the omission so to notify
the indemnifying party will not, in any event, relieve the indemnifying party
from any obligations to any indemnified party other than the indemnification
obligation provided in paragraph (a) or (b) above. In case any such action is
brought against any indemnified party, and it notifies the indemnifying party of
the commencement thereof, the indemnifying party will be entitled to participate
therein and, to the extent that it may wish, jointly with any other indemnifying
party similarly notified, to assume the defense thereof, with counsel reasonably
satisfactory to such indemnified party (who shall not, except with the consent
of the indemnified party, be counsel to the indemnifying party), and after
notice from the indemnifying party to such indemnified party of its election so
to assume the defense thereof the indemnifying party will not be liable to such
indemnified party under this Section 5 for any legal or other expenses, other
than reasonable costs of investigation, subsequently incurred by such
indemnified party in connection with the defense thereof. No indemnifying party
shall, without the prior written consent of the indemnified party, effect any
settlement of any pending or threatened action in respect of which any
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 any claims
that

                                      -14-
<Page>

are the subject matter of such action, and does not include a statement as to or
an admission of fault, culpability or a failure to act by or on behalf of any
indemnified party.

     (d)  If the indemnification provided for in this Section 5 is unavailable
or insufficient to hold harmless an indemnified party under subsections (a) or
(b) above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to in subsection (a) or (b)
above in such proportion as is appropriate to reflect the relative fault of the
indemnifying party or parties on the one hand and the indemnified party on the
other in connection with the statements or omissions that resulted in such
losses, claims, damages or liabilities (or actions in respect thereof) as well
as any other relevant equitable considerations. The relative fault of the
parties 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
on the one hand or such Holder or such other indemnified party, as the case may
be, on the other, and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.
The amount paid by an indemnified party as a result of the losses, claims,
damages or liabilities referred to in the first sentence of this subsection (d)
shall be deemed to include any legal or other expenses reasonably incurred by
such indemnified party in connection with investigating or defending any action
or claim which is the subject of this subsection (d). Notwithstanding any other
provision of this Section 5(d), the Holders of the Securities shall not be
required to contribute any amount in excess of the amount by which the net
proceeds received by such Holders from the sale of the Securities pursuant to a
Registration Statement exceeds the amount of damages which such Holders have
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. For purposes of this paragraph (d), each person,
if any, who controls such indemnified party within the meaning of the Securities
Act or the Exchange Act shall have the same rights to contribution as such
indemnified party and each person, if any, who controls the Company within the
meaning of the Securities Act or the Exchange Act shall have the same rights to
contribution as the Company.

     (e)  The agreements contained in this Section 5 shall survive the sale of
the Securities pursuant to a Registration Statement and shall remain in full
force and effect, regardless of any termination or cancellation of this
Agreement or any investigation made by or on behalf of any indemnified party.

     6.  ADDITIONAL INTEREST UNDER CERTAIN CIRCUMSTANCES. (a) Additional
interest (the "ADDITIONAL INTEREST") with respect to the Securities shall be
assessed as follows if any of the following events occur (each such event in
clauses (i) through (iv) below being herein called a "REGISTRATION DEFAULT"):

            (i)   any Registration Statement required by this Agreement is not
     filed with the Commission on or prior to the applicable Filing Deadline;

                                      -15-
<Page>

           (ii)   any Registration Statement required by this Agreement is not
     declared effective by the Commission on or prior to the applicable
     Effectiveness Deadline;

          (iii)   the Registered Exchange Offer has not been consummated on or
     prior to the Consummation Deadline; or

           (iv)   any Registration Statement required by this Agreement has been
     declared effective by the Commission but (A) such Registration Statement
     thereafter ceases to be effective or (B) such Registration Statement or the
     related prospectus ceases to be usable in connection with resales of
     Transfer Restricted Securities during the periods specified herein because
     either (1) any event occurs as a result of which the related prospectus
     forming part of such Registration Statement would include any untrue
     statement of a material fact or omit to state any material fact necessary
     to make the statements therein in the light of the circumstances under
     which they were made not misleading, or (2) it shall be necessary to amend
     such Registration Statement or supplement the related prospectus, to comply
     with the Securities Act or the Exchange Act or the respective rules
     thereunder.

     Each of the foregoing will constitute a Registration Default whatever the
reason for any such event and whether it is voluntary or involuntary or is
beyond the control of the Company or pursuant to operation of law or as a result
of any action or inaction by the Commission.

     Additional Interest shall accrue on the Securities over and above the
interest set forth in the title of the Securities from and including the date on
which any such Registration Default shall occur to but excluding the date on
which all such Registration Defaults have been cured, at a rate of 0.25% per
annum (the "ADDITIONAL INTEREST RATE") for the first 90-day period immediately
following the occurrence of such Registration Default. The Additional Interest
Rate shall increase by an additional 0.25% per annum with respect to each
subsequent 90-day period until all Registration Defaults have been cured, up to
a maximum Additional Interest Rate of 1.0% per annum.

     (b)  A Registration Default referred to in Section 6(a)(iv) hereof shall be
deemed not to have occurred and be continuing in relation to a Shelf
Registration Statement or the related prospectus if (i) such Registration
Default has occurred solely as a result of (x) the filing of a post-effective
amendment to such Shelf Registration Statement to incorporate annual audited
financial information with respect to the Company where such post-effective
amendment is not yet effective and needs to be declared effective to permit
Holders to use the related prospectus or (y) other material events, with respect
to the Company that would need to be described in such Shelf Registration
Statement or the related prospectus and (ii) in the case of clause (y), the
Company is proceeding promptly and in good faith to amend or supplement such
Shelf Registration Statement and related prospectus to describe such events;
PROVIDED, HOWEVER, that in any case if such Registration Default occurs for a
continuous period in excess of 30 days, Additional Interest shall be payable in
accordance with the above paragraph from the day such Registration Default
occurs until such Registration Default is cured.

     (c)  Any amounts of Additional Interest due pursuant to Section 6(a) will
be payable in cash on the regular interest payment dates with respect to the
Securities. The amount of

                                      -16-
<Page>

Additional Interest will be determined by multiplying the applicable Additional
Interest Rate by the principal amount of the Securities and further multiplied
by a fraction, the numerator of which is the number of days such Additional
Interest Rate was applicable during such period (determined on the basis of a
360-day year comprised of twelve 30-day months), and the denominator of which is
360.

     (d)  "TRANSFER RESTRICTED SECURITIES" means each Security until (i) the
date on which such Security has been exchanged by a person other than a
broker-dealer for a freely transferable Exchange Security in the Registered
Exchange Offer, (ii) following the exchange by a broker-dealer in the Registered
Exchange Offer of the Initial Security for an Exchange Note, the date on which
such Exchange Note is sold to a purchaser who receives from such broker-dealer
on or prior to the date of such sale a copy of the prospectus contained in the
Exchange Offer Registration Statement, (iii) the date on which such Security has
been effectively registered under the Securities Act and disposed of in
accordance with the Shelf Registration Statement or (iv) the date on which such
Security is distributed to the public pursuant to Rule 144 under the Securities
Act or is saleable pursuant to Rule 144(k) under the Securities Act.

     (e)  The parties hereto agree that the Additional Interest shall constitute
a reasonable estimate of the damages that may be incurred by the Holders (other
than the Initial Purchaser) for a Registration Default and shall constitute
liquidated damages; the actual damages that the Holders might sustain as a
result of a Registration Default would be difficult to ascertain; and the
payment of Additional Interest would be reasonable and just compensation for a
Registration Default.

     7.  RULES 144 AND 144A. The Company shall use its reasonable best efforts
to file the reports required to be filed by it under the Securities Act and the
Exchange Act in a timely manner and, if at any time the Company is not required
to file such reports, it will, upon the request of any Holder of Securities,
make publicly available other information so long as necessary to permit sales
of their securities pursuant to Rules 144 and 144A. The Company covenants that
it will take such further action as any Holder of Securities may reasonably
request, all to the extent required from time to time to enable such Holder to
sell Securities without registration under the Securities Act within the
limitation of the exemptions provided by Rules 144 and 144A (including the
requirements of Rule 144A(d)(4)). The Company will provide a copy of this
Agreement to prospective purchasers of Initial Securities identified to the
Company by the Initial Purchaser upon request. Upon the request of any Holder of
Initial Securities, the Company shall deliver to such Holder a written statement
as to whether it has complied with such requirements. Notwithstanding the
foregoing, nothing in this Section 7 shall be deemed to require the Company to
register any of its securities pursuant to the Exchange Act.

     8.  UNDERWRITTEN REGISTRATIONS. If any of the Transfer Restricted
Securities covered by any Shelf Registration are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("MANAGING UNDERWRITERS") will be selected by
the Holders of a majority in aggregate principal amount of such Transfer
Restricted Securities to be included in such offering.

                                      -17-
<Page>

     No person may participate in any underwritten registration hereunder unless
such person (i) agrees to sell such person's Transfer Restricted 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.   MISCELLANEOUS.

     (a)  NO INCONSISTENT AGREEMENTS. The Company will not on or after the date
of this Agreement enter into any agreement with respect to its securities that
is inconsistent with the rights granted to the Holders 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 securities under any
agreement in effect on the date hereof.

     (b)  AMENDMENTS AND WAIVERS. The provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to departures from
the provisions hereof may not be given, except by the Company and the written
consent of the Holders of a majority in principal amount of the Securities
affected by such amendment, modification, supplement, waiver or consents.

     (c)  NOTICES. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

             (1)  if to a Holder of the Securities, at the most current address
     given by such Holder to the Company.

             (2)  if to the Initial Purchaser:

                          Banc One Capital Markets, Inc.
                          1 Bank One Plaza
                          Suite IL1-0595
                          Chicago, IL  60670
                          Fax No.: (312) 732-4773
                          Attention: Structuring & Execution

                  with a copy to:

                          Chapman and Cutler
                          111 West Monroe Street
                          Chicago, IL 60603
                          Fax No.: (312)701-2361
                          Attention: Paul Kosin

                                      -18-
<Page>

             (3)  if to the Company, at its address as follows:

                          The Peoples Gas Light and Coke Company
                          130 East Randolph Drive
                          Chicago, IL 60601
                          Attention: Treasurer

                  with a copy to:

                          The Peoples Gas Light and Coke Company
                          130 East Randolph Drive
                          Chicago, IL 60601
                          Attention: General Counsel

     All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's facsimile machine operator, if sent by facsimile
transmission; and on the day delivered, if sent by overnight air courier
guaranteeing next day delivery.

     (d)  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.

     (e)  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 or assumption, subsequent Holders; PROVIDED that nothing herein shall
be deemed to permit any assignment, transfer or other disposition of the Initial
Securities in violation of the terms of the Purchase Agreement. If any
transferees of any Holder shall acquire Initial Securities, in any manner,
whether by operation of law or otherwise, such Initial Securities, shall be held
subject to all of the terms of this Agreement, and by taking and holding such
Initial 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 Initial
Purchaser 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, the
obligations of such Holder under this Agreement.

     (f)  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.

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

                                      -19-
<Page>

     (h)  GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF ILLINOIS WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAWS.

     (i)  SEVERABILITY. If 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.

     (j)  SECURITIES HELD BY THE COMPANY. Whenever the consent or approval of
Holders of a specified percentage of principal amount of Securities is required
hereunder, Securities held by the Company or its affiliates (other than
subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.

     (k)  SUBMISSION TO JURISDICTION; WAIVER OF IMMUNITIES. By the execution and
delivery of this Agreement, the Company submits to the nonexclusive jurisdiction
of any federal or state court in the State of New York in any suit or proceeding
brought under federal or state securities laws. To the extent that the Company
may acquire any immunity from jurisdiction of any such court or from any legal
process (whether through service of notice, attachment prior to judgment,
attachment in aid of execution, execution or otherwise) with respect to itself
or its property, it hereby irrevocably waives such immunity in respect of this
Agreement, to the fullest extent permitted by law.

                                      -20-
<Page>

     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to the Company a counterpart hereof, whereupon this
instrument, along with all counterparts, will become a binding agreement among
the Initial Purchaser and the Company, in accordance with its terms.

                                Very truly yours,

                                THE PEOPLES GAS LIGHT AND COKE COMPANY


                                By /S/  DOUGLAS M. RASCHAU
                                  ----------------------------------------------
                                   Name: Douglas M. Raschau
                                        ----------------------------------------
                                   Title: Vice President and Assistant Treasurer
                                         ---------------------------------------

                                      -21-
<Page>

The foregoing Registration Rights
Agreement is hereby confirmed and
accepted as of the date first above written.

BANC ONE CAPITAL  MARKETS, INC.


By /S/ C. VICTOR MANNY
  -------------------------------
Name: C. Victor Manny
     ----------------------------
Title: Managing Director
      ---------------------------

                                      -22-
<Page>

                                                                         ANNEX A

     Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities. The Letter
of Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. This Prospectus, as it may be amended or
supplemented from time to time, may be used by a broker-dealer in connection
with resales of Exchange Securities received in exchange for Initial Securities
where such Initial Securities were acquired by such broker-dealer as a result of
market-making activities or other trading activities. The Company has agreed
that, for a period of 180 days after the Expiration Date (as defined herein), it
will make this Prospectus available to any broker-dealer for use in connection
with any such resale. See "Plan of Distribution."

                                      -23-
<Page>

                                                                         ANNEX B

     Each broker-dealer that receives Exchange Securities for its own account in
exchange for Initial Securities, where such Initial Securities were acquired by
such broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such Exchange Securities. See "Plan of Distribution."

                                      -24-
<Page>

                                                                         ANNEX C

                              PLAN OF DISTRIBUTION

     Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities. This
Prospectus, as it may be amended or supplemented from time to time, may be used
by a broker-dealer in connection with resales of Exchange Securities received in
exchange for Initial Securities where such Initial Securities were acquired as a
result of market-making activities or other trading activities. The Company has
agreed that, for a period of 180 days after the Expiration Date, it will make
this prospectus, as amended or supplemented, available to any broker-dealer for
use in connection with any such resale. In addition, until ___________________,
200__, all dealers effecting transactions in the Exchange Securities may be
required to deliver a prospectus.(1)

     The Company will not receive any proceeds from any sale of Exchange
Securities by broker-dealers. Exchange Securities received by broker-dealers for
their own account pursuant to the Exchange Offer may be sold from time to time
in one or more transactions in the over-the-counter market, in negotiated
transactions, through the writing of options on the Exchange Securities or a
combination of such methods of resale, at market prices prevailing at the time
of resale, at prices related to such prevailing market prices or negotiated
prices. Any such resale may be made directly to purchasers or to or through
brokers or dealers who may receive compensation in the form of commissions or
concessions from any such broker-dealer or the purchasers of any such Exchange
Securities. Any broker-dealer that resells Exchange Securities that were
received by it for its own account pursuant to the Exchange Offer and any broker
or dealer that participates in a distribution of such Exchange Securities may be
deemed to be an "underwriter" within the meaning of the Securities Act and any
profit on any such resale of Exchange Securities and any commission or
concessions received by any such persons may be deemed to be underwriting
compensation under the Securities Act. The Letter of Transmittal states that, by
acknowledging that it will deliver and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.

     For a period of 180 days after the Expiration Date the Company will
promptly send additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal. The Company has agreed to pay all expenses
incident to the Exchange Offer (including the expenses of one counsel for the
Holders of the Securities) other than commissions or concessions of any brokers
or dealers and will indemnify the Holders of the Securities (including any
broker-dealers) against certain liabilities, including liabilities under the
Securities Act.

----------
(1)   In addition, the legend required by Item 502(e) of Regulation S-K will
      appear on the back cover page of the Exchange Offer prospectus.

                                      -25-
<Page>

                                                                         ANNEX D

/ /  CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
     COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
     THERETO.

          Name:
               -------------------------------------------------

          Address:
                  ----------------------------------------------

     If the undersigned is not a broker-dealer, the undersigned represents that
it is not engaged in, and does not intend to engage in, a distribution of
Exchange Securities. If the undersigned is a broker-dealer that will receive
Exchange Securities for its own account in exchange for Initial Securities that
were acquired as a result of market-making activities or other trading
activities, it acknowledges that it will deliver a prospectus in connection with
any resale of such Exchange Securities; however, by so acknowledging and by
delivering a prospectus, the undersigned will not be deemed to admit that it is
an "underwriter" within the meaning of the Securities Act.

                                      -26-