Document:

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                                                                    EXHIBIT 4.13

                       LIMITED LIABILITY COMPANY AGREEMENT

                                       OF

                       RELIANT ENERGY RETAIL HOLDINGS, LLC

                        Effective as of September 1, 2000

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                       LIMITED LIABILITY COMPANY AGREEMENT

         This Limited Liability Company Agreement (this "Agreement") is made and
executed to be effective as of September 1, 2000, by Reliant Energy Unregco,
Inc. a Delaware corporation.

         WHEREAS, a certificate of formation of Reliant Energy Retail Holdings,
LLC (the "Company"), has been filed with the Secretary of State of the State of
Delaware; and

         WHEREAS, it is desired that the orderly management of the affairs of
the Company be provided for;

         NOW, THEREFORE, it is agreed as follows:

                                    ARTICLE I

                                   DEFINITIONS

         The following terms used in this Agreement shall have the following
meanings (unless otherwise expressly provided herein):

         "Additional Member" shall mean any Person admitted to the Company as an
Additional Member pursuant to Section 4.3 of this Agreement.

         "Affiliate," with respect to a specified Person, shall mean a Person
that directly, or indirectly through one or more intermediaries, controls or is
controlled by, or is under common control with, the Person specified. For
purposes of this definition, "control" shall mean the possession, directly or
indirectly, of the power to direct or cause the direction of the management and
policies of a Person, whether through the ownership of voting securities, by
contract or otherwise.

         "Agreement" shall mean this Agreement as originally executed and as it
may be amended from time to time hereafter.

         "Capital Contribution" shall mean any contribution to the capital of
the Company in cash or property by a Member whenever made.

         "Capital Percentage" shall mean a Member's ownership interest in the
Company expressed as a percentage of the total Common Shares issued and
outstanding.

         "Certificate of Formation" shall mean the Certificate of Formation of
the Company filed with and endorsed by the Secretary of State of the State of
Delaware, as such certificate may be amended from time to time hereafter.

         "Code" shall mean the Internal Revenue Code of 1986, as amended, or
corresponding

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provisions of subsequent superseding federal revenue laws.

         "Common Share" shall mean an undivided portion of all of the rights,
duties, obligations and ownership interests in the Company.

         "Delaware Act" shall mean the Delaware Limited Liability Company Act,
as the same may be amended from time to time hereafter.

         "Entity" shall mean any foreign or domestic general partnership,
limited partnership, limited liability company, corporation, joint enterprise,
trust, business trust, employee benefit plan, cooperative or association.

         "Fiscal Year" shall mean the Company's fiscal year, which shall be
determined by the Managers in accordance with Section 706(b) of the Code.

         "Initial Capital Contribution" shall mean the initial Capital
Contribution by a Member pursuant to Section 4.1(b) of this Agreement.

         "Manager" shall mean any of the managers of the Company duly appointed
or elected to serve in such capacity under Delaware law and this Agreement.

         "Member" shall mean each Person who executes a counterpart of this
Agreement as a Member and each Person who may hereafter become an Additional
Member pursuant to Section 4.3 or a Substituted Member pursuant to Section 13.3;
but shall not include any Member that ceases to be a Member.

         "Person" shall mean any individual or Entity, and any heir, executor,
administrator, legal representative, successor or assign of such "Person" where
the context so admits.

         "Requisite Interest" shall mean the Members holding more than 50% of
the issued and outstanding Common Shares held by Members at any given time.

         "Substituted Member" shall mean any transferee or assignee of Common
Shares that is admitted to the Company as a Member pursuant to Section 13.3.

                                   ARTICLE II
                            FORMATION OF THE COMPANY

         2.1      Formation. On August 25, 2000, the Certificate of Formation of
the Company was filed with the Secretary of State of the State of Delaware
pursuant to the Delaware Act.

         2.2      Name. The name of the Company is Reliant Energy Retail
Holdings, LLC. If the Company shall conduct business in any jurisdiction other
than the State of Delaware, it shall register the Company or its trade name with
the appropriate authorities in such state in order to have the legal existence
of the Company recognized.

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         2.3      Place of Business. The Company may locate its places of
business and registered office at any place or places as the Managers may from
time to time deem advisable.

         2.4      Registered Office and Registered Agent. The Company's
registered office shall be at the office of its registered agent at 1209 Orange
Street, Wilmington, Delaware 19801, and the name of its initial registered agent
at such address shall be The Corporation Trust Company.

         2.5      Term. The Company and this Agreement shall continue until the
earliest of (a) such time as all of the Company's assets have been sold or
otherwise disposed of, or (b) such time as the Company's existence has been
terminated as otherwise provided herein or in the Delaware Act.

         2.6      Purpose of the Company. The purpose of the Company shall be to
do any or all things that may lawfully be done by a limited liability company
pursuant to the Delaware Act. The Company shall have any and all powers
necessary or desirable to carry out the purpose and business of the Company to
the extent the same may be legally exercised by limited liability companies
under the Delaware Act. The Company shall carry out the foregoing activities
pursuant to the Certificate of Formation and this Agreement.

                                   ARTICLE III
                                 INITIAL MEMBER

         The name and place of business of the initial Member (the "Initial
Member") is as follows:

                              Reliant Energy Unregco, Inc.
                              1111 Louisiana
                              Houston, Texas 77002

                                   ARTICLE IV
                             CAPITAL OF THE COMPANY

         4.1      Common Shares and Initial Contributions.

                  (a)      A class of equity interests denominated the "Common
Shares" is hereby designated as the sole class of equity interests of the
Company. Each issued and outstanding Common Share shall at any time represent
that undivided portion of all of the rights, duties, obligations and ownership
interests in the Company in proportion to the total number of Common Shares
outstanding at such time.

                  (b)      The Company will issue to the Initial Member 1,000
Common Shares upon payment of $1,000 to the Company from the Initial Member,
which shall be deemed to be the "Initial Capital Contribution" of the Initial
Member. Upon receipt of the Initial Capital

                  Contribution and issuance of said 1,000 Common Shares, such
Common Shares shall be validly issued and outstanding, fully paid and
nonassessable.

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         4.2      Additional Contributions. No Member shall be required to make
additional Capital Contributions unless, and except on such terms as, the
Managers and Members unanimously agree.

         4.3      Additional Issuances of Common Shares.

                  (a)      In the event of any additional Capital Contributions,
and in order to raise additional capital or to acquire assets, to redeem or
retire Company debt or for any other purpose, the Company is authorized to issue
Common Shares from time to time to Members or to other Persons, subject to the
approval of the Requisite Interest. The Company may assume liabilities in
connection with any such issuance. The Managers shall determine the
consideration and terms and conditions with respect to any such issuance of
Common Shares. The Managers shall do all things necessary or advisable in
connection with any such issuance, including, without limitation, compliance
with any statute, rule, regulation or guideline of any federal, state or other
governmental agency.

                  (b)      Upon (i) the execution and delivery to the Company of
this Agreement, as it may be amended, by any Person who is issued any Common
Shares, (ii) receipt by the Company of any Capital Contribution required of such
Person made in connection with the issuance of Common Shares, (iii) consent by
all other Members to such Person being admitted as an Additional Member and (iv)
any other action required by Delaware law, such Person shall be admitted as an
Additional Member of the Company.

         4.4      Record of Contributions. The books and records of the Company
shall include true and full information regarding the amount of cash and cash
equivalents and designation and statement of the value of any other property
contributed by each Member to the Company.

         4.5      No Fractional Common Shares. No fractional Common Shares shall
be issued by the Company unless otherwise determined by the Managers; instead,
each fractional Common Share shall be rounded to the nearest whole Common Share.

         4.6      Interest. No interest shall be paid by the Company on Capital
Contributions.

         4.7      Loans from Members. Loans by a Member to the Company shall not
be considered Capital Contributions.

         4.8      Withdrawal or Reduction of Members' Capital Contributions.

                  (a)      A Member shall not be entitled to withdraw any part
of his Capital Contribution or to receive any distribution from the Company,
except as otherwise provided in this Agreement.

                  (b)      A Member shall not receive out of the Company's
property any part of his Capital Contributions until all liabilities of the
Company, except liabilities to Members on account of their Capital
Contributions, have been paid or there remains property of the Company

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sufficient to pay them.

                  (c)      A Member, irrespective of the nature of his Capital
Contribution, has only the right to demand and receive cash in return for his
Capital Contribution.

         4.9      Loans to Company. Nothing in this Agreement shall prevent any
Member from making secured or unsecured loans to the Company by agreement with
the Company.

         4.10     Borrowing. In the event that the Company, in order to
discharge costs, expenses or indebtedness, requires funds in excess of the funds
provided by Capital Contributions of the Members and by revenues, the Managers
shall be authorized, at any time and from time to time, to cause the Company to
borrow additional funds, as shall in the judgment of the Managers be sufficient
for such purposes and upon such terms as the Managers may deem advisable.

         4.11     No Further Obligation. Except as expressly provided for in or
contemplated by this Article IV, no Member shall have any obligation to provide
funds to the Company, whether by Capital Contributions, loans, return of monies
received pursuant to the terms of this Agreement or otherwise.

                                    ARTICLE V

                        RIGHTS AND OBLIGATIONS OF MEMBERS

         5.1      Limitation of Members' Responsibility, Liability. The Members
shall not perform any act on behalf of the Company, incur any expense,
obligation or indebtedness of any nature on behalf of the Company, or in any
manner participate in the management of the Company or receive or be credited
with any amounts, except as specifically contemplated hereunder. The Members
shall not be personally liable for any amount in excess of their respective
Capital Contributions, and shall not be liable for any of the debts or losses of
the Company, except to the extent that a liability of the Company is founded
upon or results from an unauthorized act or activity of such Member. In
addition, each Member's liability shall be limited as set forth in the Delaware
Act and other applicable law hereafter in effect.

         5.2      Return of Distributions. In accordance with Section 18-607 of
the Delaware Act, a Member will be obligated to return any distribution from the
Company only as provided by applicable law.

         5.3      Priority and Return of Capital. Except as may be provided in
this Agreement, no Member shall have priority over any other Member, either as
to the return of Capital Contributions or as to profits, losses or
distributions; provided that this Section shall not apply to loans (as
distinguished from Capital Contributions) that a Member has made to the Company.

                                   ARTICLE VI

                         MEETINGS OF MEMBERS; AMENDMENTS

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         6.1      Meetings. Meetings of the Members, for any purpose or
purposes, unless otherwise prescribed by statute, may be called by any Manager
or by any Member or group of Members holding, in the aggregate, 25% or more of
the Capital Percentage.

         6.2      Place of Meetings. The Members may designate any place as the
place of meeting for any meeting of the Members. If no designation is made, the
meeting shall be held at the principal offices of the Company.

         6.3      Notice of Meetings. Except as provided in Section 6.4, written
notice stating the place, day and hour of the meeting and the purpose or
purposes for which the meeting is called shall be delivered not less than ten
nor more than 60 days before the date of the meeting, either personally or by
mail, by or at the direction of the Manager or Person calling the meeting, to
each Member entitled to vote at such meeting. If mailed, such notice shall be
deemed to be delivered when deposited in the United States mail, addressed to
the Member at his address as it appears on the books of the Company, with
postage thereon prepaid. If transmitted by way of facsimile, such notice shall
be deemed to be delivered on the date of such facsimile transmission to the fax
number, if any, for the respective Member that has been supplied by such Member
to the Manager and identified as such Member's facsimile number.

         6.4      Meeting of All Members. If all of the Members shall meet at
any time and place and consent to the holding of a meeting at such time and
place, such meeting shall be valid without call or notice, and at such meeting
lawful action may be taken.

         6.5      Record Date. For the purpose of determining Members entitled
to notice of or to vote at any meeting of Members, the Managers may set a record
date. When a determination of Members entitled to vote at any meeting of Members
has been made as provided in this Section, such determination shall apply to any
adjournment thereof.

         6.6      Quorum. Members holding at least a majority of Common Shares
entitled to vote, represented in person or by proxy, shall constitute a quorum
at any meeting of Members. In the absence of a quorum at any such meeting,
Members holding a majority of such Common Shares so represented may adjourn the
meeting from time to time for a period not to exceed 60 days without further
notice. However, if the adjournment is for more than 60 days, or if after the
adjournment a new record date is fixed for the adjourned meeting, a notice of
the adjourned meeting shall be given to each Member of record entitled to vote
at the meeting.

         At such adjourned meeting at which a quorum shall be present or
represented, any business may be transacted that might have been transacted at
the meeting as originally noticed. The Members present at a duly organized
meeting may continue to transact business until adjournment, notwithstanding the
withdrawal during such meeting of Members holding that number of Common Shares
whose absence would cause less than a quorum.

         6.7      Manner of Acting. If a quorum is present, the affirmative vote
of the Requisite Interest on the subject matter shall be the act of the Members,
unless the vote of a greater or lesser proportion or number is otherwise
required by the Delaware Act, by the Certificate of Formation or by this
Agreement.

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         6.8      Proxies. At all meetings of Members, a Member may vote in
person or by proxy executed in writing by the Member or by a duly authorized
attorney-in-fact. Such proxy shall be filed with the Managers of the Company
before or at the time of the meeting. No proxy shall be valid after 11 months
from the date of its execution, unless otherwise provided in the proxy.

         6.9      Action by Members Without a Meeting. Action required or
permitted to be taken at a meeting of Members may be taken without a meeting if
the action is evidenced by one or more written consents describing the action
taken, signed by Members entitled to vote thereon holding not less than the
number of Common Shares required to approve such action and delivered to the
Managers of the Company for inclusion in the minutes or for filing with the
Company records. Action taken under this Section is effective when all Members
entitled to vote thereon holding not less than the number of Common Shares
required to approve such action have signed the consent, unless the consent
specifies a different effective date. The record date for determining Members
entitled to take action without a meeting shall be the date the first Member
signs a written consent.

         6.10     Waiver of Notice. When any notice is required to be given to
any Member, a waiver thereof in writing signed by the Person entitled to such
notice, whether before, at or after the time stated therein, shall be equivalent
to the giving of such notice.

         6.11     Special Prohibitions and Limitations. Without the prior
approval of the Requisite Interest, the Company shall not (i) sell, exchange or
otherwise dispose of all or substantially all of the assets of the Company
outside the ordinary course of business of the Company (provided, however, that
this provision shall not be interpreted to preclude or limit the mortgage,
pledge, hypothecation or grant of a security interest in all or substantially
all of the assets of the Company and shall not apply to any forced sale of any
or all of the assets of the Company pursuant to the foreclosure of (or in lieu
of foreclosure), or other realization upon, any such encumbrance), (ii) merge,
consolidate or combine with any other Person, or (iii) issue additional Common
Shares.

         6.12     Amendments to be Adopted Solely by the Managers. The Managers,
without the consent at the time of any Member, may amend any provision of this
Agreement and execute, swear to, acknowledge, deliver, file and record whatever
documents may be required in connection therewith, to reflect:

                  (a)      a change in the name of the Company or the location
of the principal place of business of the Company;

                  (b)      the admission, substitution or withdrawal of Members
in accordance with this Agreement;

                  (c)      a change that is necessary or advisable in the
opinion of the Managers to qualify the Company as a company in which members
have limited liability under the laws of any state or other jurisdiction or to
ensure that the Company will not be treated as an association taxable as a
corporation for federal income tax purposes;

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                  (d)      a change that (i) in the sole discretion of the
Managers does not adversely affect the Members in any material respect, (ii) is
necessary or desirable to satisfy any requirements, conditions or guidelines
contained in any opinion, directive, order , ruling or regulation of any federal
or state agency or contained in any federal or state statute or (iii) is
required or contemplated by this Agreement;

                  (e)      a change in any provision of this Agreement that
requires any action to be taken by or on behalf of the Company or the Members
pursuant to the requirements of Delaware law if the provisions of Delaware law
are amended, modified or revoked so that the taking of such action is no longer
required; provided that this Section 6.12(e) shall be applicable only if such
changes are not materially adverse to the Members;

                  (f)      a change that is necessary or desirable in connection
with the issuance of Common Shares pursuant to Section 4.3; or

                  (g)      any other amendments similar to the foregoing.

         Each Member hereby appoints each Manager as its attorney-in-fact to
execute any amendment permitted by this Section 6.12.

         6.13     Amendments. A proposed amendment to this Agreement (other than
one permitted by Section 6.12) shall be effective upon its adoption by Members
holding in excess of 80% of the issued and outstanding Common Shares at such
time. The Company shall notify all Members upon final adoption or rejection of
any proposed amendment to this Agreement.

                                   ARTICLE VII

                          RIGHTS AND DUTIES OF MANAGERS

         7.1      Management. The powers of the Company shall be exercised by or
under the authority of, and the business and affairs of the Company shall be
managed under, its Managers. In addition to the powers and authorities expressly
conferred by this Agreement upon the Managers, the Managers may exercise all
such powers of the Company and do all such lawful acts and things as are not
directed or required to be exercised or done by the Members by the Delaware Act,
the Certificate of Formation of the Company or this Agreement.

         7.2      Number and Qualifications. The number of Managers of the
Company shall initially be one; but the number of Managers may be changed by
unanimous agreement of the Members. Managers need not be residents of the State
of Delaware or Members of the Company. The Managers, in their discretion, may
elect a chairman of the Managers who shall preside at any meetings of the
Managers.

         7.3      Powers of the Managers. Without limiting the generality of
Section 7.1, the Managers shall have power and authority, acting in concert in
accordance with this Agreement, to cause the Company to do and perform all acts
as may be necessary or appropriate to the

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conduct of the Company's business.

         7.4      Initial Manager. The initial Manager shall be Robert W.
Harvey. The Members shall have the right to take action pursuant to a meeting of
the Members or unanimous written consent of the Members to designate one or more
Managers and to remove, replace or fill any vacancy occurring for any reason of
any Manager.

         7.5      Place of Meetings. All meetings of the Managers of the Company
or committees thereof may be held either within or without the State of
Delaware. Any Manager may participate in a meeting by means of conference
telephone or similar equipment, and participation by such means shall constitute
presence in person at the meeting.

         7.6      Meetings of Managers. Meetings of the Managers may be called
by any Manager on two days' notice to each Manager, either personally or by
mail, telephone or telegram.

         7.7      Quorum. At all meetings of the Managers, the presence of a
majority of the Managers shall be necessary and sufficient to constitute a
quorum for the transaction of business unless a greater number is required by
law. The act of a majority of the Managers present at a meeting at which a
quorum is present shall be the act of the Managers, except as otherwise provided
by law, Certificate of Formation or this Agreement. If a quorum shall not be
present at any meeting of the Managers, the Managers present at the meeting may
adjourn the meeting from time to time, without notice other than announcement at
the meeting, until a quorum shall be present.

         7.8      Attendance and Waiver of Notice. Attendance of a Manager at
any meeting shall constitute a waiver of notice of such meeting, except where a
Manager attends a meeting for the express purpose of objecting to the
transaction of any business on the ground that the meeting is not lawfully
called or convened. Neither the business to be transacted at, nor the purpose
of, any regular or special meeting of the Managers need be specified in the
notice or waiver of notice of such meeting.

         7.9      Action by Managers Without a Meeting. Action required or
permitted to be taken at a meeting of Managers may be taken without a meeting if
the action is evidenced by one or more written consents describing the action
taken, signed by a majority of the Managers and included in the Company minutes
or records. Action taken under this Section is effective when a majority of the
Managers have signed the consent, unless the consent specifies a different
effective date. The record date for determining Managers entitled to take action
without a meeting shall be the date the first Manager signs a written consent.

         7.10     Compensation of Managers. Managers, as such, shall not receive
any stated salary for their services, but shall receive such compensation for
their services as may be from time to time approved by the Members, provided
that nothing contained in this Agreement shall preclude any Manager from serving
the Company in any other capacity and receiving compensation for service. In
addition, a fixed sum and expenses of attendance, if any, may be allowed for
attendance at each meeting of the Managers.

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         7.11     Committees. The Managers may, by resolution, designate from
among the Managers one or more committees, each of which shall be comprised of
one or more Managers, and may designate one or more of the Managers as alternate
members of any committee, who may, subject to any limitations imposed by the
Managers, replace absent or disqualified Managers at any meeting of that
committee. Such committee shall have and may exercise all of the authority of
the Managers, subject to the limitations set forth in this Agreement and under
the Delaware Act.

         7.12     Liability of Managers. A Manager shall not be liable under any
judgment, decree or order of a court, or in any other manner, for any debt,
obligation or liability of the Company by reason of his acting as a Manager of
the Company. A Manager of the Company shall not be personally liable to the
Company or its Members for monetary damages for breach of fiduciary duty as a
Manager, except for liability for any acts or omissions that involve intentional
misconduct, fraud or a knowing violation of law or for a distribution in
violation of Delaware law as a result of the willful or grossly negligent act or
omission of the Manager. If the laws of the State of Delaware are amended after
the date of this Agreement to authorize action further eliminating or limiting
the personal liability of Managers, then the liability of a Manager of the
Company, in addition to the limitation on personal liability provided herein,
shall be limited to the fullest extent permitted by the amended laws of the
State of Delaware. Any repeal or modification of this Section 7.12 by the
Members of the Company shall be prospective only, and shall not adversely affect
any limitation on the personal liability of a Manager of the Company existing at
the time of such repeal or modification or thereafter arising as a result of
acts or omissions prior to the time of such repeal or modification.

         7.13     Officers. The Managers of the Company may elect the officers
of the Company, who shall hold offices specified by the Managers for such terms
and shall exercise such powers and perform such duties as shall be determined
from time to time by the Managers; and each officer of the Company shall hold
office until his successor is chosen and qualified or until his earlier
resignation or removal. Any officer elected by the Managers may be removed at
any time by the affirmative vote of the Managers. Any vacancy occurring in any
office of the Company may be filled by the unanimous agreement of the Managers.
The salaries of all officers of the Company shall be fixed by the Managers but
must be approved by the Members.

                                  ARTICLE VIII

                                 INDEMNIFICATION

         8.1      Indemnification. Each Person who at any time shall be, or
shall have been, a Member, Manager or officer of the Company, or any Person who,
while a Member, Manager, officer, employee or agent of the Company, is or was
serving at the request of the Company as a director, member, manager, officer,
partner, venturer, proprietor, trustee, employee, agent or similar functionary
of an Entity, shall be entitled to indemnification as and to the fullest extent
permitted by the provisions of Delaware law or any successor statutory
provisions, as from time to time amended. The foregoing right of indemnification
shall not be deemed exclusive of any other rights to which one to be indemnified
may be entitled as a matter of law or under this Agreement, any other agreement,
by vote of the Members or disinterested Managers or

<PAGE>

otherwise, both as to any action in an official capacity and as to action in
another capacity while holding such office. Any repeal of this Section 8.1 shall
be prospective only, and shall not adversely affect any right of indemnification
existing at the time of such repeal or modification or thereafter arising as a
result of acts or omissions prior to the time of such repeal or modification.
Any Person entitled to indemnification in accordance with this Section 8.1 shall
hereinafter be referred to as an "Indemnitee." If any provision or provisions of
this Agreement relating to indemnification shall be held to be invalid, illegal
or unenforceable for any reason whatsoever, the validity, legality and
enforceability of the remaining provisions shall not in any way be affected or
impaired thereby; and, to the fullest extent possible, the provisions of this
Agreement shall be construed so as to give effect to the intent manifested by
the provision held invalid, illegal or unenforceable, including, without
limitation, by allowing indemnification by vote of the Members or Managers or
the disinterested minority thereof.

           8.2    Power to Indemnify in Actions, Suits or Proceedings Other Than
         Those by or in the Right of the Company. Without limiting the
         provisions of Section 8.1, the Company may indemnify an Indemnitee who
         was or is a party or is threatened to be made a party to any
         threatened, pending or completed action, suit or proceeding, whether
         civil, criminal, administrative or investigative (other than an action
         by or in the right of the Company) by reason of the fact that the
         Indemnitee is or was a Member or Manager or officer of the Company, or
         is or was serving at the request of the Company as a director, member,
         manager, officer, employee or agent of an Entity, against expenses
         (including attorneys' fees), judgments, fines and amounts paid in
         settlement actually and reasonably incurred by the Indemnitee in
         connection with such action, suit or proceeding, if the Indemnitee
         acted in good faith and in a manner the Indemnitee reasonably believed
         to be in or not opposed to the best interests of the Company, and, with
         respect to any criminal action or proceeding, had no reasonable cause
         to believe the Indemnitee' s conduct was unlawful. The termination of
         any action, suit or proceeding by judgment, order, settlement,
         conviction, or upon a plea of nob contendere or its equivalent, shall
         not, of itself, create a presumption that the Indemnitee did not act in
         good faith and in a manner that the Indemnitee reasonably believed to
         be in or not opposed to the best interest of the Company, and, with
         respect to any criminal action or proceeding, had reasonable cause to
         belive that the Indemnitee's conduct was unlawful.

           8.3    Power to Indemnify in Actions, Suits or Proceedings by or in
         the Right of the Company. Without limiting the provisions of Section
         8.1, the Company may indemnify an Indemnitee who was or is a party or
         is threatened to be made a party to any threatened, pending or
         completed action or suit by or in the right of the Company to procure a
         judgment in its favor by reason of the fact that the Indemnitee is or
         was a Member or Manager or officer of the Company, or is or was serving
         at the request of the Company as a director, member, manager, officer,
         employee or agent of an Entity against expenses (including attorneys'
         fees) actually and reasonably incurred by the Indemnitee in connection
         with the defense or settlement of such action or suit if the Indemnitee
         acted in good faith and in a manner the Indemnitee reasonably believed
         to be in or not opposed to the best interests of the Company; except
         that no indemnification shall be made in respect of any claim, issue or
         matter as to which the Indemnitee shall have been adjudged to be liable
         to the Company unless and only to the extent that the court in which
         such action or suit was brought shall determine upon application that,
         despite the adjudication of liability but in view of all the
         circumstances of the case, the Indemnitee is fairly and reasonably
         entitled to indemnification

<PAGE>

         for such expenses that the court shall deem proper.

           8.4      Good Faith Defined. For purposes of any determination under
         this Article VIII, a Person shall be deemed to have acted in good faith
         and in a manner such Person reasonably believed to be in or not opposed
         to the best interests of the Company, or, with respect to any criminal
         action or proceeding, to have had no reasonable cause to believe such
         Person's conduct was unlawful, if such Person's action is based upon
         the records of the Company and upon such information, opinions, reports
         or statements presented to the Company by any of the Members, Managers,
         officers, employees or committees of the Company or by any other Person
         as to matters the Person reasonably believes are within such other
         Person's professional or expert competence and who has been selected
         with reasonable care by or on behalf of the Company, including
         information, opinions, reports or statements as to the value and amount
         of assets, liabilities, profits or losses of the Company or any other
         facts pertinent to the existence and amount of assets from which
         distributions to the Members might properly be paid. The provisions of
         this Section 8.4 shall not be deemed to be exclusive or to limit in any
         way the circumstances in which a Person may be deemed to have met the
         applicable standards of conduct set forth in the provisions of the
         Delaware Act, or in Section 8.2 or Section 8.3, as the case may be.

           8.5      Advancement or Reimbursement of Expenses. The Company may
         pay in advance or reimburse expenses actually or reasonably incurred or
         anticipated by an Indemnitee in connection with an appearance as a
         witness or other participation in a proceeding whether or not such
         Indemnitee is a named defendant or a respondent in the proceeding. To
         obtain reimbursement or an expense advance, the requesting Person shall
         submit to the Company a written request with such information as is
         reasonably available. If the expense advance is to be paid prior to
         final disposition of the proceeding, there shall be included a written
         statement of such Person's good faith belief that such indemnification
         is appropriate under the circumstances and, if such Person is not a
         Member or Manager, that such Person has met the necessary standard of
         conduct under Section 8.2 or Section 8.3 as applicable or otherwise has
         met any applicable standard of conduct under the Delaware Act and an
         undertaking to repay any amount paid if it is ultimately determined
         that those conduct requirements were not met. Upon receipt of the
         request, the Managers and Members (by unanimous agreement), shall
         determine whether such Person is entitled to such reimbursement or an
         expense advance. If the request is rejected, the Company shall notify
         such Person of the reason therefor. If, within sixty days of the
         Company's receipt of the request, the request for payment is not acted
         on, such Person shall have the right to an adjudication in any court of
         competent jurisdiction of such Person's entitlement to such
         indemnification or expense advance.

           8.6      Nonexclusivity and Survival of Indemniifcation. The
         indemnification and advancement of expenses provided by, or granted
         pursuant to, the other subsections of this Article VIII shall not be
         deemed exclusive of any other rights to which one seeking
         indemnification and advancement of expenses may be entitled under this
         Agreement, any other agreement, by vote of the disinterested Members or
         Managers or otherwise, both as to action in an official capacity and as
         to action in any other capacity while holding such office, it being the
         policy of the Company that, if the Managers and Members unanimously
         approve, indemnification specified in this Article VIII shall be made
         to the fullest extent permitted by law. The provisions of this Article
         VIII shall not be deemed to preclude the indemnification

<PAGE>

         of any Person who is not specified in this Article VIII but whom the
         Company has the power or obligation to indemnify under the provisions
         of the Delaware Act or otherwise.

           8.7      Insurance. The Company may purchase and maintain insurance
         on behalf of any Person who is or was a Member, Manager, officer,
         employee or agent of the Company, or is or was serving at the request
         of the Company as a member, manager, director, officer, employee or
         agent of an Entity against any liability asserted against and incurred
         by such Person in any such capacity or arising out of such Person's
         status as such, whether or not the Company would have the power or the
         obligation to indemnify such Person against such liability under the
         provisions of this article VIII.

           8.8      Interested Party Transactions. Without limiting the
         generality of any other provision hereof, the Company may (except as
         otherwise specifically provided for in this Agreement) enter into any
         contract, arrangement or transaction between the Company and one or
         more Members, Managers or officers, or between the Company and an
         Entity that is an Affiliate of one or more Members or officers or in
         which a Member, Manager or officer has an interest or serves as a
         director, member, manager, officer, partner, venturer, proprietor,
         trustee, employee, agent or similar functionary and such contract,
         arrangement or transaction shall not, because of such interest by or
         position of a Member, Manager or officer, be void or voidable nor
         impose on any such Person any burden or obligation to show the fairness
         of the contract, arrangement or transaction, but shall instead be
         accorded the same treatment as a contract, arrangement or understanding
         between the Company and an unrelated party.

                                   ARTICLE IX

                            ISSUANCE OF CERTIFICATES

           9.1      Issuance of Certificates. Upon the issuance of Common
         Shares, the Company shall issue one or more Certificates in the name of
         the Members owning such Common Shares. Upon the transfer of a Common
         Share, the Company shall issue replacement Certificates according to
         such procedures as the Company may reasonably establish.

           9.2      Lost, Stolen or Destroyed Certificates. The Company shall
         issue a new Certificate in place of any Certificate previously issued
         if the registered owner of the Certificate:

                    (a)    makes proof by affidavit, in form and substance
satisfactory to the Company, that a previously issued Certificate has been lost,
destroyed or stolen;

                    (b)    requests the issuance of a new Certificate before the
Company has notice that the Certificate has been acquired by a purchaser for
value in good faith and without notice of an adverse claim;

                    (c)    if requested by the Company, delivers to the Company
a bond, in form and substance satisfactory to the Company, with such surety or
sureties and with fixed or open penalty as the Company may direct to indemnify
the Company against any claim that may be made on account of the alleged loss,
destruction or theft of the Certificate; and

                    (d)    satisfies any other reasonable requirements imposed
by the Company.

<PAGE>

                  When a Certificate has been lost, destroyed or stolen, and the
         Member fails to notify the Company within a reasonable time after he
         has notice of it, and a transfer of the Common Shares represented by
         the Certificate is registered before the Company receives such
         notification, the Member shall be precluded from making any claim
         against the Company for such transfer or for a new Certificate.

                  9.3      Registered Owners. The Company shall be entitled to
         treat the registered owner of any Common Shares as the Person that owns
         such Common Shares and, accordingly, shall not be bound to recognize
         any equitable or other claim to or interest in such Common Shares on
         the part of any other Person, regardless of whether it shall have
         actual or other notice thereof, except as otherwise provided by law.

                                    ARTICLE X

                          ALLOCATIONS AND DISTRIBUTIONS

                  10.1     Allocations. Except as may otherwise be unanimously
         agreed by the Managers with the consent of the Members, all items of
         income, gain, loss, deduction, and credit of the Company shall be
         allocated among the Members in accordance with their Capital
         Percentages.

                  10.2     Distributions. From time to time the Managers by
         unanimous agreement may determine to what extent (if any) the Company's
         cash on hand exceeds its current and anticipated needs, including,
         without limitation, for operating expenses, debt service, acquisitions,
         and a reasonable contingency reserve, and if such an excess exists,
         cause the Company to distribute to the Members, in accordance with
         their Capital Percentages (or such other proportions as all of the
         Managers may agree, with the consent of the Members) an amount in cash
         equal to that excess.

                                   ARTICLE XI

                     ACCOUNTING PERIOD, RECORDS AND REPORTS

                  11.1     Accounting Period. The Company's accounting period
         shall be the Fiscal Year.

                  11.2     Records, Audits and Reports. At the expense of the
         Company, the Managers shall maintain records and accounts of all
         operations and expenditures of the Company.

                  11.3     Inspection. The books and records of the Company
         shall be maintained at the principal place of business of the Company
         and shall be open to inspection by the Members at all reasonable times
         during any business day.

                                   TAX MATTERS

                  12.1     Tax Returns and Elections. The Managers or their
designees shall cause the preparation and

<PAGE>

timely filing of all tax returns required to be filed by the Company pursuant to
the Code and all other tax returns that the Managers or their designees deem
necessary and required to be filed by the Company. Copies of such returns, or
pertinent information therefrom, shall be furnished to the Members as promptly
as practicable after filing.

         12.2     State, Local or Foreign Income Taxes. In the event state or
foreign income taxes are applicable, any references to federal income taxes or
to "income taxes" contained herein shall refer to federal, state, local and
foreign income taxes. References to the Code or Treasury Regulations shall be
deemed to refer to corresponding provisions that may become applicable under
state, local or foreign income tax statutes and regulations.

         12.3     Assignments and Issuance of Additional Common Shares. The
Company shall allocate taxable items attributable to a Common Share that is
assigned or newly issued during a Fiscal Year between the assignor and the
assignee of such Common Share or the existing Members and the new Members by
closing the books of the Company as of the end of the day prior to the day in
which such Common Shares are assigned or issued.

                                  ARTICLE XIII

                        RESTRICTIONS ON TRANSFERAIBIL1TY;
                         ADMISSION OF SUBSTITUTE MEMBERS

         13.1     Generally. All Common Shares at any time and from time to time
outstanding shall be held subject to the conditions and restrictions set forth
in this Article XIII, which conditions and restrictions shall apply equally to
the Members and their respective transferees (except as otherwise expressly
stated), and each Member by executing this Agreement or by accepting a
certificate or other indicia of ownership therefor from the Company agrees with
the Company and with each other Member to such conditions and restrictions.
Without limiting the generality of the foregoing, the Company shall require as a
condition to the transfer of record ownership of Common Shares that the
transferee of such Common Shares execute and deliver this Agreement as evidence
that such Common Shares are held subject to the terms, conditions and
restrictions set forth herein.

         13.2     Restriction on Transfer. No Common Shares shall be sold,
assigned, given, transferred, exchanged, devised, bequeathed, pledged or
otherwise disposed of to any Person except in accordance with the terms of this
Agreement. All certificates representing the respective Common Shares shall
contain conspicuous notation on such certificate indicating that the transfer of
such Common Shares is subject to the terms and restrictions of this Agreement,
and each Member consents to the placement of such legend on the certificate or
certificates representing the Common Shares owned by such Member.

         13.3     Substituted Members. Any Person that acquires any Common
Shares that is not already a Member shall not have the right to participate in
the management of the business and affairs of the Company, to vote such Common
Shares, or to become a Member of the Company unless the Members of the Company
unanimously consent to such Person becoming a Member of the Company. If such
Person is not admitted as a Member of the Company, such Person only is entitled
to receive the share of profits, distributions, and allocations of income, gain,
loss, deduction, credit, or similar item to which the Person would be entitled
if such Person were a Member of the Company.

<PAGE>

                                   ARTICLE XIV

                           DISSOLUTION AND TERMINATION

         14.1     Dissolution.

                  (a)      The Company shall dissolve upon the occurrence of any
of the following events:

                           (i)      when the period fixed for the duration of
                  the Company shall expire;

                           (ii)     if the Members so agree in writing;

                           (iii)    if the Requisite Interest votes to dissolve
                  the Company; or

                           (iv)     as otherwise provided under Delaware law.

                  (b)      The personal representative (or other
successor-in-interest) of a deceased Member shall, subject to the provisions of
Article XIII, succeed to the deceased Member's interest in the Company. However,
such personal representative (or other successor in interest) shall not be
entitled to be admitted as a Member unless the conditions specified in Article
XIII are met.

         14.2     Effect of Dissolution. Upon the occurrence of any of the
events specified in this Article XIV effecting the dissolution of the Company,
the Company shall cease to carry on its business, except insofar as may be
necessary for the winding up of its business, but its separate existence shall
continue until a certificate of cancellation has been issued by the Secretary of
State or until a decree dissolving the Company has been entered by a court of
competent jurisdiction.

         14.3     Winding Up, Liquidating and Distribution of Assets.

                  (a)      Upon dissolution, an accounting shall be made of the
accounts of the Company and of the Company's assets, liabilities and operations,
from the date of the last previous accounting until the date of dissolution. The
Managers shall immediately proceed to wind up the affairs of the Company.

                  (b)      If the Company is dissolved and its affairs are to be
wound up, the Managers shall (1) sell or otherwise liquidate all of the
Company's assets as promptly as practicable (except to the extent the Managers
may determine to distribute any assets in kind to the Members), (2) allocate any
income or loss resulting from such sales to the Members in accordance with this
Agreement, (3) discharge all liabilities to creditors in the order of priority
as provided by law, (4) discharge all liabilities of the Members (other than
liabilities to Members or for Capital Contributions to the extent unpaid in
breach of an obligation to do so), including all costs relating to the
dissolution, winding up and liquidation and distribution of assets, (5)
establish such reserves as the Managers may determine to be reasonably necessary
to provide for contingent liabilities of the Company, (6) discharge any
liabilities of the Company to the Members other than on account of their
interests in Company capital or profits and (7) distribute the remaining assets
to the Members, either in cash or in kind, as determined by the Managers, pro
rata according to the relative number of Common Shares held by each. If any
assets of the Company are to be distributed in kind, the net fair market value
of such assets as of the date of dissolution shall be

<PAGE>

determined by independent appraisal or by agreement of the Managers.

                  (c)      Notwithstanding anything to the contrary in this
Agreement, upon a liquidation of the Company no Member shall have any obligation
to make any contribution to the capital of the Company other than any Capital
Contributions such Member agreed to make in accordance with this Agreement.

                  (d)      Upon completion of the winding up, liquidation and
distribution of the assets, the Company shall be deemed terminated.

                  (e)      The Managers shall comply with any applicable
requirements of applicable law pertaining to the winding up of the affairs of
the Company and the final distribution of its assets.

         14.4     Certificate of Cancellation. When all debts, liabilities and
obligations have been paid and discharged or adequate provisions have been made
therefor and all of the remaining property and assets have been distributed to
the Members, a Certificate of Cancellation shall be executed in duplicate, and
verified by the person signing the Certificate of Cancellation and filed with
the Delaware Secretary of State, which Certificate shall set forth the
information required by the Delaware Act.

         14.5     Return of Contribution Non-recourse to Other Members. Except
as provided by law, upon dissolution, each Member shall look solely to the
assets of the Company for the return of the Member's Capital Contribution. If
the Company property remaining after the payment or discharge of the debts and
liabilities of the Company is insufficient to return the cash or other property
contribution of one or more Members, such Member or Members shall have no
recourse against any other Member.

                            MISCELLANEOUS PROVISIONS

         15.1     Notices. Any notice, demand or communication required or
permitted to be given by any provision of this Agreement shall be deemed to have
been sufficiently given or served for all purposes if delivered personally to
the party or to an executive officer of the party to whom the same is directed
or if sent by registered or certified mail, postage and charges prepaid,
addressed to the Member's and/or Company's address, as appropriate, which is set
forth in this Agreement. If mailed, any such notice shall be deemed to be
delivered two calendar days after being deposited in the United States mail with
postage thereon prepaid, addressed and sent as aforesaid.

         15.2     Books of Account and Records. Proper and complete records and
books of account in which shall be entered fully and accurately all transactions
and other matters relating to the Company's business in such detail and
completeness as is customary and usual for businesses of the type engaged in by
the Company shall be kept or shall be caused to be kept by the Company. Such
books and records shall be maintained as provided in Section 11.3.

         15.3     Application of Delaware Law. This Agreement, and the
application of interpretation hereof, shall be governed exclusively by its terms
and by the laws of the State of Delaware, and specifically the Delaware Act.

         15.4     Waiver of Action for Partition. Each Member irrevocably
waives, during the term of the Company, any right that such Member may have to
maintain any action for partition with respect to the property of the Company.

<PAGE>

         15.5     Execution of Additional Instruments. Each Member hereby agrees
to execute such other and further statements of interest and holdings,
designations, powers of attorney and other instruments necessary to comply with
any laws, rules or regulations.

         15.6     Headings. The headings in this Agreement are inserted for
convenience only and are in no way intended to describe, interpret, define or
limit the scope, extent or intent of this Agreement or any provision hereof.

         15.7     Waivers. No waiver of any right under this Agreement shall be
effective unless evidenced in writing and executed by the Person entitled to the
benefits thereof. The failure of any party to seek redress for violation of or
to insist upon the strict performance of any covenant or condition of this
Agreement shall not prevent another act or omission, which would have originally
constituted a violation, from having the effect of an original violation.

         15.8     Rights and Remedies Cumulative. The rights and remedies
provided by this Agreement are cumulative and the use of any one right or remedy
by any party shall not preclude or waive the right to use any or all other
rights or remedies. Said rights and remedies are given in addition to any other
rights the parties may have by law, statute, ordinance or otherwise.

         15.9     Severability. If any provision of this Agreement or the
application thereof to any person or circumstance shall be invalid, illegal or
unenforceable to any extent, the remainder of this Agreement and the application
thereof shall not be affected and shall be enforceable to the fullest extent
permitted by law.

         15.10    Heirs, Successors and Assigns. Each and all of the covenants,
terms, provisions and agreements herein contained shall be binding upon and
inure to the benefit of the parties hereto and, to the extent permitted by this
Agreement, their respective heirs, legal representatives, successors and
assigns.

         15.11    Creditors. None of the provisions of this Agreement shall be
for the benefit of or enforceable by any creditors of the Company.

         15.12    Counterparts. This Agreement may be executed in counterparts,
each of which shall be deemed an original but all of which shall constitute one
and the same instrument.

             EXECUTED to be effective as of the date first above written.

                                            RELIANT ENERGY UNREGCO, INC.

                                            By: /s/ Rufus Scott
                                               --------------------------------
                                                Rufus Scott
                                                Vice President<PAGE>

                                                                    Exhibit 4.14

                              CERTIFICATE OF MERGER
                                       OF
                RELIANT ENERGY POWER GENERATION MERGER SUB, INC.,
                             A DELAWARE CORPORATION,
                                      INTO
                           ORION POWER HOLDINGS, INC.,
                             A DELAWARE CORPORATION

         ORION POWER HOLDINGS, INC., a Delaware corporation (the "SURVIVING
CORPORATION"), in compliance with the requirements of the General Corporation
Law of the State of Delaware, as amended (the "DGCL"), and desiring to effect a
merger of RELIANT ENERGY POWER GENERATION MERGER SUB, INC., a Delaware
corporation (the "MERGING CORPORATION," and collectively with the Surviving
Corporation, the "CONSTITUENT CORPORATIONS"), with and into the Surviving
Corporation, and acting by its duly authorized officer, DOES HEREBY CERTIFY
that:

         FIRST: The name and state of incorporation of each of the Constituent
Corporations of the merger are as follows:

<TABLE>
<CAPTION>
NAME                                        STATE OF INCORPORATION
----                                        ----------------------
<S>                                         <C>
ORION POWER HOLDINGS, INC.                  Delaware
RELIANT ENERGY POWER GENERATION
MERGER SUB, INC.                            Delaware
</TABLE>

         SECOND: An agreement and plan of merger has been approved, adopted,
certified, executed and acknowledged by each of the Constituent Corporations in
accordance with the requirements of Section 251(c) of the DGCL;

         THIRD: The name of the Surviving Corporation of the merger is ORION
POWER HOLDINGS, INC. At the effective time of the merger, the name of the
Surviving Corporation will be changed to RELIANT ENERGY POWER GENERATION MERGER
SUB, INC.;

         FOURTH: The Certificate of Incorporation of the Surviving Corporation
is hereby amended in its entirety to read as set forth on EXHIBIT A attached
hereto, and as so amended, such Certificate of Incorporation shall be the
Certificate of Incorporation of the Surviving Corporation until such time as it
may be amended in accordance with applicable law and the provisions thereof;

         FIFTH: The executed agreement and plan of merger is on file at an
office of the Surviving Corporation, the address of which is Seven East Redwood
Street, 10th Floor, Baltimore, Maryland 21202;

         SIXTH: A copy of the agreement and plan of merger will be furnished by
the Surviving Corporation, on request and without cost, to any stockholder of
any Constituent Corporation; and

         SEVENTH: This Certificate of Merger shall be effective on its filing
with the Secretary of State of the State of Delaware.

         Dated: February 19, 2002

                                          ORION POWER HOLDINGS, INC.,
                                                a Delaware corporation
                                          By: /s/ W. THADDEUS MILLER
                                              Name: W. THADDEUS MILLER
                                              Title: EXECUTIVE VICE PRESIDENT
                                                     AND CHIEF LEGAL OFFICER

<PAGE>

                                                                       EXHIBIT A

                          CERTIFICATE OF INCORPORATION

                                       OF

                RELIANT ENERGY POWER GENERATION MERGER SUB, INC.

         FIRST: The name of the Corporation is Reliant Energy Power Generation
Merger Sub, Inc. (hereinafter the "Company").

         SECOND: The address of the registered office of the Company in the
State of Delaware is 9 East Loockerman Street, City of Dover 19901, County of
Kent, and the name of the registered agent of the Company at such address is
National Registered Agents, Inc.

         THIRD: The purpose of the Company is to engage in any lawful act or
activity for which corporations may be organized under the General Corporation
Law of the State of Delaware (the "DGCL").

         FOURTH: The total number of shares of all classes of stock which the
Company shall have authority to issue is 1,000 shares of common stock, par value
$1.00 per share ("Common Stock"). Each share of Common Stock shall entitle the
holder thereof to one vote on each matter voted upon by the stockholders of the
Company. Shares of Common Stock may be issued for such consideration and for
such corporate purposes as the Board of Directors of the Company (the "Board of
Directors") may from time to time determine.

         FIFTH: The following provisions are inserted for the management of the
business and the conduct of the affairs of the Company, and for further
definition, limitation, and regulation of the powers of the Company and of its
directors and stockholders.

         (1)      The business and affairs of the Company shall be managed by or
                  under the direction of the Board of Directors except as
                  otherwise provided by law.

         (2)      The number of directors of the Company shall be as from time
                  to time fixed by, or in the manner provided in, the Bylaws of
                  the Company (the "Bylaws"). Election of directors need not be
                  by written ballot unless the Bylaws so provide.

         (3)      In addition to the powers and authority hereinbefore or by
                  statute expressly conferred upon them, the directors are
                  hereby authorized to exercise all such powers and do all such
                  acts and things as may be exercised or done by the Company,
                  subject, nevertheless, to the provisions of the statutes of
                  the State of Delaware, this Certificate of Incorporation, and
                  any Bylaws adopted by the stockholders; provided, however,
                  that no Bylaws thereafter adopted by the stockholders shall
                  invalidate any prior act of the directors which would have
                  been valid if such Bylaws had not been adopted.

         (4)      In furtherance of, and not in limitation of, the powers
                  conferred by statute, the Board of Directors is expressly
                  authorized to make, alter, amend, change, add to, or repeal
                  the Bylaws of the Company.

         SIXTH: Meetings of the stockholders may be held within or without the
State of Delaware, as the Bylaws may provide. The books of the Company may be
kept (subject to any provision contained in the statutes) outside the State of
Delaware at such place or places as may be designated from time to time by the
Board of Directors or in the Bylaws.

         SEVENTH: No director of the Company shall be personally liable to the

<PAGE>

Company or any of its stockholders for monetary damages for breach of fiduciary
duty as a director of the Company; provided, however, that this Article Seventh
shall not eliminate or limit the liability of such a director

         (1)      for any breach of such director's duty of loyalty to the
                  Company or its stockholders,

         (2)      for acts or omissions not in good faith or which involve
                  intentional misconduct or a knowing violation of law,

         (3)      under Section 174 of the DGCL, as the same exists or as such
                  provision may hereafter be amended, supplemented or replaced,
                  or

         (4)      for any transactions from which such director derived an
                  improper personal benefit.

         If the DGCL is amended after the filing of this Certificate of
Incorporation to authorize corporate action further eliminating or limiting the
personal liability of directors, then the liability of a director of the
Company, in addition to the limitation on personal liability provided herein,
shall be limited to the fullest extent permitted by such law, as so amended. Any
repeal or modification of this Article Seventh by the stockholders of the
Company shall be prospective only, and shall not adversely affect any limitation
on the personal liability of a director of the Company existing at the time of
such repeal or modification.

         EIGHTH: Whenever a compromise or arrangement is proposed between the
Company and its creditors or any class of them and/or between the Company and
its stockholders or any class of them, any court of equitable jurisdiction
within the State of Delaware may, on the application in a summary way of the
Company or of any creditor or stockholder thereof or on the application of any
receiver or receivers appointed for the Company under Section 291 of the DGCL or
on the application of trustees in dissolution or of any receiver or receivers
appointed for the Company under Section 279 of the DGCL order a meeting of the
creditors or class of creditors, and/or of the stockholders or class of
stockholders of the Company, as the case may be, to be summoned in such manner
as the said court directs. If a majority in number representing three fourths in
value of the creditors or class of creditors, and/or of the stockholders or
class of stockholders of the Company, as the case may be, agree to any
compromise or arrangement and to any reorganization of the Company as
consequence of such compromise or arrangement, the said compromise or
arrangement and the said reorganization shall, if sanctioned by the court to
which the said application has been made, be binding on all the creditors or
class of creditors, and/or on all the stockholders or class of stockholders, of
the Company, as the case may be, and also on the Company.

         NINTH: The Company reserves the right to amend, alter, change, or
repeal any provision contained in this Certificate of Incorporation, in the
manner now or hereafter prescribed by the laws of the State of Delaware. All
rights herein conferred are granted subject to this reservation.

<PAGE>

                                    AMENDMENT
                                       OF
                          CERTIFICATE OF INCORPORATION
                                       OF
                RELIANT ENERGY POWER GENERATION MERGER SUB, INC.,
                             A DELAWARE CORPORATION
                   (TO BE RENAMED ORION POWER HOLDINGS, INC.)

         Reliant Energy Power Generation Merger Sub, Inc. ("Company"), a
corporation organized and existing under and by virtue of the General
Corporation Law of the State of Delaware ("DGCL"), acting by its duly authorized
officer does hereby certify that:

         1.       The name of the Company is Reliant Energy Power Generation
                  Merger Sub, Inc.

         2.       The Board of Directors of the Company duly adopted a
                  resolution proposing and declaring advisable the amendment to
                  the Certificate of Incorporation as described herein, and the
                  Company's sole stockholder has duly adopted such amendment,
                  all in accordance with the provisions of Sections 141, 228 and
                  242 of the DGCL.

         3.       The amendment to Certificate of Incorporation effected by this
                  amendment changes the name of the Company to Orion Power
                  Holdings, Inc.

         4.       The Certificate of Incorporation is hereby amended by deleting
                  Article First thereof and replacing it in its entirety with
                  the following Article First:

         FIRST: The name of the Corporation is Orion Power Holdings, Inc.
(hereinafter the "Company").

         IN WITNESS WHEREOF, the Company has caused this certificate to be
executed this 19TH day of February, 2002.

                                  RELIANT ENERGY POWER GENERATION MERGER
                                  SUB, INC.

                                  By: /s/ CURTIS A. MORGAN
                                      -----------------------------------
                                      Name: Curtis A. Morgan
                                      Title: President

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