Document:

<PAGE>   1
                                                               EXHIBIT 10(CC)(1)

                          RELIANT ENERGY, INCORPORATED
                                  SAVINGS PLAN

                (As Amended and Restated Effective April 1, 1999)

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                          RELIANT ENERGY, INCORPORATED
                                  SAVINGS PLAN

                (As Amended and Restated Effective April 1, 1999)

                                    I N D E X

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ARTICLE I    DEFINITIONS..............................................................3
     1.1     Account..................................................................3
     1.2     Affiliate................................................................3
     1.3     After-Tax Contributions..................................................3
     1.4     After-Tax Contribution Account...........................................3
     1.5     Anniversary Date.........................................................3
     1.6     Beneficiary..............................................................3
     1.7     Code.....................................................................3
     1.8     Committee................................................................3
     1.9     Company..................................................................3
     1.10    Company Stock............................................................4
     1.11    Compensation.............................................................4
     1.12    Contribution.............................................................4
     1.13    Defined Benefit Plan.....................................................4
     1.14    Disability...............................................................4
     1.15    Effective Date...........................................................4
     1.16    Employee.................................................................4
     1.17    Employer.................................................................5
     1.18    Employer Contributions...................................................5
     1.19    Employer Matching Account................................................5
     1.20    Employer Matching Contributions..........................................5
     1.21    ERISA....................................................................5
     1.22    ESOP Account.............................................................5
     1.23    ESOP Contributions.......................................................5
     1.24    ESOP Fund................................................................5
     1.25    Exempt Loan..............................................................5
     1.26    Fiduciaries..............................................................5
     1.27    Financed Stock...........................................................5
     1.28    HII Participant..........................................................6
     1.29    Investment Fund..........................................................6
     1.30    Investment Manager.......................................................6
     1.31    Leave for Business and Civic Reasons.....................................6
     1.32    Minnegasco Participant...................................................6
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     1.33    Minnegasco Plan...........................................................6
     1.34    NorAm Participant.........................................................6
     1.35    NorAm Plan................................................................6
     1.36    Participant...............................................................6
     1.37    Plan......................................................................6
     1.38    Plan Year.................................................................7
     1.39    Pre-Tax Contributions.....................................................7
     1.40    Pre-Tax Contribution Account..............................................7
     1.41    Prior HII Plan............................................................7
     1.42    Prior Plan................................................................7
     1.43    Prior Plan Accounts.......................................................7
     1.44    Prior Plan Participant....................................................7
     1.45    Qualified Military Service................................................7
     1.46    Retirement................................................................7
     1.47    Retirement Date...........................................................7
     1.48    Rollover Account..........................................................7
     1.49    Service...................................................................8
     1.50    Stock Suspense Account....................................................8
     1.51    Trust Agreement...........................................................8
     1.52    Trust Fund................................................................8
     1.53    Trustee...................................................................8
     1.54    Valuation Date............................................................8
     1.55    Vesting Service...........................................................8

ARTICLE II   ADMINISTRATION OF THE PLAN................................................9
     2.1     Appointment of Committee..................................................9
     2.2     Records of Committee......................................................9
     2.3     Committee Action..........................................................9
     2.4     Committee Disqualification................................................9
     2.5     Committee Compensation and Expenses.......................................9
     2.6     Committee Liability.......................................................9
     2.7     Committee Determinations.................................................10
     2.8     Information from Employer................................................11
     2.9     Uniform Administration...................................................11
     2.10    Reporting Responsibilities...............................................12
     2.11    Disclosure Responsibilities..............................................12
     2.12    Quarterly Statements.....................................................12
     2.13    Allocation of Responsibility Among Fiduciaries for Plan and
             Trust Administration.....................................................12
     2.14    Annual Audit.............................................................13
     2.15    Presenting Claims for Benefits...........................................13
</TABLE>

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     2.16    Claims Review Procedure.................................................14
     2.17    Disputed Benefits.......................................................14

ARTICLE III       PARTICIPATION IN THE PLAN..........................................15
     3.1     Eligibility of Employees................................................15
     3.2     Employee Information....................................................15
     3.3     Notification of Eligible Employees......................................15
     3.4     Application by Participants.............................................15
     3.5     Service Defined.........................................................15
     3.6     Commencement and Termination of Service.................................17
     3.7     Break In Service........................................................17
     3.8     Effect of Re-employment Prior to a Break In Service.....................18
     3.9     Effect of Re-employment After a Break In Service........................18
     3.10    Vesting Service.........................................................19
     3.11    Transferred Participants................................................19

ARTICLE IV        CONTRIBUTIONS TO THE PLAN..........................................22
     4.1     Employer Contributions..................................................22
     4.2     Pre-Tax Contributions...................................................22
     4.3     After-Tax Contributions.................................................23
     4.4     Actual Deferral Percentage..............................................24
     4.5     Actual Deferral Percentage Limits.......................................25
     4.6     Reduction of Pre-Tax Contribution Rates by Leveling Method..............26
     4.7     Increase in Pre-Tax Contribution Rates..................................26
     4.8     Excess Pre-Tax Contributions............................................26
     4.9     Contribution Percentage and ESOP Percentage.............................28
     4.10    Contribution Percentage and ESOP Percentage Limits......................29
     4.11    Treatment of Excess Aggregate Contributions or ESOP Contributions.......30
     4.12    Multiple Use of Alternative Limitation..................................31
     4.13    ESOP Contributions, Employer Matching Contributions and
             Pre-Tax Contributions to be Tax Deductible..............................32
     4.14    Maximum Allocations.....................................................32
     4.15    Refunds to Employer.....................................................32
     4.16    Rollover Contributions..................................................32

ARTICLE V    PARTICIPANTS' ACCOUNTS..................................................35
     5.1     Trust Accounts..........................................................35
     5.2     Valuation of Trust Fund.................................................36
     5.3     Allocation to Accounts..................................................37
     5.4     Treatment of Company Stock Purchased with an Exempt Loan................38
     5.5     Maximum Annual Additions................................................40
     5.6     Certain Conditions Applicable to Company Stock..........................48
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ARTICLE VI   PARTICIPANTS' BENEFITS.........................................................51
     6.1     Termination of Service.........................................................51
     6.2     Disability of Participants.....................................................51
     6.3     Death of Participants..........................................................51
     6.4     Retirement of Participants on or After Retirement Date.........................53
     6.5     In-Service Distributions.......................................................53
     6.6     Payments of Benefits...........................................................53
     6.7     Payment of Distribution Directly to Eligible Retirement Plan...................56
     6.8     Participation Rights Determined as of Valuation Date Coinciding
             with or Preceding Termination of Employment....................................57
     6.9     Treatment of Non-Vested Account Balances Upon Termination of Service...........57
     6.10    Required Minimum Distributions.................................................58
     6.11    Unclaimed Benefits.............................................................59
     6.12    Optional Forms of Benefits.....................................................59

ARTICLE VII  WITHDRAWALS AND LOANS..........................................................60
     7.1     Withdrawal of After-Tax Contributions:.........................................60
     7.2     Withdrawal of After-Tax and Pre-Tax Contributions On and After Age 59 1/2......60
     7.3     Withdrawal from Prior Plan Accounts and Rollover Account.......................60
     7.4     Conditions of Withdrawals......................................................61
     7.5     Loans..........................................................................61

ARTICLE VIII INVESTMENT DIRECTIONS..........................................................63
     8.1     Investment of Trust Fund.......................................................63
     8.2     Diversification Election.......................................................64
     8.3     Voting of Company Stock; Exercise of Other Rights..............................65

ARTICLE IX   TRUST AGREEMENT AND TRUST FUND.................................................67
     9.1     Trust Agreement................................................................67
     9.2     Benefits Paid Solely from Trust Fund...........................................67
     9.3     Committee Directions to Trustee................................................67
     9.4     Trustee's Reliance on Committee Instructions...................................67
     9.5     Authority of Trustee in Absence of Instructions from the Committee.............67
     9.6     Compliance with Exchange Act Rule 10(b)(18)....................................68

ARTICLE X    ADOPTION OF PLAN BY OTHER CORPORATIONS,
             AMENDMENT AND TERMINATION OF THE PLAN, AND
             DISCONTINUANCE OF CONTRIBUTIONS TO THE TRUST FUND..............................69
     10.1    Adoption by Employers..........................................................69
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     10.2    Continuous Service.............................................................69
     10.3    Amendment of the Plan..........................................................70
     10.4    Termination of the Plan........................................................70
     10.5    Distribution of Trust Fund on Termination......................................70
     10.6    Effect of Discontinuance of Contributions......................................71
     10.7    Merger of Plan with Another Plan...............................................71

ARTICLE XI   TOP-HEAVY PLAN REQUIREMENTS....................................................73
     11.1    General Rule...................................................................73
     11.2    Vesting Provisions.............................................................73
     11.3    Minimum Contribution Provisions................................................73
     11.4    Limitation on Compensation.....................................................74
     11.5    Limitation on Contributions....................................................74
     11.6    Coordination with Other Plans..................................................75
     11.7    Distributions to Certain Key Employees.........................................75
     11.8    Determination of Top-Heavy Status..............................................75

ARTICLE XII  MISCELLANEOUS PROVISIONS.......................................................80
     12.1    Terms of Employment............................................................80
     12.2    Controlling Law................................................................80
     12.3    Invalidity of Particular Provisions............................................80
     12.4    Non-Alienability of Rights of Participants.....................................80
     12.5    Payments in Satisfaction of Claims of Participants.............................81
     12.6    Payments Due Minors and Incompetents...........................................81
     12.7    Acceptance of Terms and Conditions of Plan by Participants.....................81
     12.8    Impossibility of Diversion of Trust Fund.......................................81
     12.9    Transition Period..............................................................81
     10.3    Amendment of the Plan..........................................................70
     10.4    Termination of the Plan........................................................70
</TABLE>

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                    RELIANT ENERGY, INCORPORATED SAVINGS PLAN

                (As Amended and Restated Effective April 1, 1999)

                                    Recitals

         Houston Industries Incorporated, a Texas corporation doing business as
Reliant Energy, Incorporated, with its principal place of business in Houston,
Harris County, Texas (the "Company"), established a tax-qualified defined
contribution plan, effective July 1, 1973, for the benefit of its eligible
Employees and retained the right to amend such Savings Plan under Section 10.3
thereof (the "Savings Plan").

         Effective January 1, 1989, the Savings Plan was amended to comply with
the provisions of the Tax Reform Act of 1986 and to make certain other changes
therein. Effective October 5, 1990, the Savings Plan was amended and restated to
include an employee stock ownership plan which is a stock bonus plan intended to
qualify under Sections 401(a) and 4975(e)(7) of the Internal Revenue Code of
1986, as amended (the "Code"), and as such is designed to invest primarily in
Company Stock. Effective July 1, 1995, the Savings Plan was again amended and
restated to make certain additional changes (the Savings Plan, as amended and
restated effective July 1, 1995, and as thereafter amended and in effect on
March 31, 1999, being herein referred to as the "Prior HII Plan").

         Effective July 1, 1995, both the Houston Industries Incorporated Master
Savings Trust and Houston Industries Incorporated ESOP Trust were amended,
restated and continued in the form of a single trust known as the Houston
Industries Incorporated Savings Trust (the "Savings Trust"), with The Northern
Trust Company as trustee. The Savings Trust was intended to form a part of the
Prior Plan.

         As a result of the merger by and among NorAm Energy Corp. ("NorAm"),
Houston Industries Incorporated, Houston Lighting & Power Company and HI Merger
Inc., NorAm became a wholly owned subsidiary of the Company and the Company (1)
assumed the sponsorship of the NorAm Employee Savings & Investment Plan (the
"NorAm Plan") and the Minnegasco Division Employees' Retirement Savings Plan
(the "Minnegasco Plan"), and (2) adopted (x) the NorAm Plan trust, known as the
NorAm Employee Savings & Investment Plan Trust (the "NorAm Trust"), (y) the
Minnegasco Plan trust, known as the Employees' Retirement Savings Plan Trust
Agreement (the "Minnegasco Trust"), and (z) the Pooled Investment Trust
Agreement for the Arkla, Inc. Common Stock Pooled Trust (the "Pooled Investment
Trust"), a pooled investment trust holding commingled assets of the NorAm Trust
and Minnegasco Trust, and the Company assumed all duties, rights and
responsibilities thereto as a party to the respective trust agreements in the
place and stead of NorAm and the Minnegasco division of NorAm, as applicable,
effective August 6, 1997.

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         Effective April 1, 1999, the Committee authorized and directed that (i)
the NorAm Plan and Minnegasco Plan be consolidated with, merged into, and
continued in the form of the Prior Plan, (ii) the Prior HII Plan be amended,
restated and continued in order to incorporate all prior amendments to the Prior
HII Plan, including the amendments incorporating certain changes required by the
Retirement Protection Act of 1994 under the General Agreement on Tariffs and
Trades, the Uniformed Services Employment and Reemployment Rights Act, the Small
Business Job Protection Act of 1996 and the Tax Reform Act of 1997, and to
provide for a continuation of at least substantially identical benefits for the
former participants of each of the NorAm Plan, the Minnegasco Plan and the Prior
HII Plan, respectively, (iii) all assets held under the NorAm Trust, the
Minnegasco Trust and the Pooled Investment Trust for the benefit of the
participants in the NorAm Plan and the Minnegasco Plan be merged with all the
assets held under the Savings Trust for the benefit of the participants in the
Prior HII Plan, (iv) the amended and restated Prior HII Plan reflect the change
in the name of the Plan sponsor from Houston Industries Incorporated to Reliant
Energy, Incorporated, and (v) certain other changes be made to the Prior HII
Plan so that, from and after April 1, 1999, the NorAm Plan, the Minnegasco Plan
and the Prior HII Plan shall constitute a "single plan" within the meaning and
purview of Section 414(l) of the Code, with the amended and restated Prior Plan,
named the Reliant Energy, Incorporated Savings Plan (hereinafter referred to as
the "Plan"), being the surviving plan for all legal purposes, including
reporting and disclosure under the Employee Retirement Income Security Act of
1974, as amended ("ERISA").

         The Plan and Savings Trust are intended to meet the requirements of
Sections 401(a), 401(k), 501(a) and 4975(e)(7) of the Code and ERISA, as either
may be amended from time to time.

         The provisions of the Plan shall apply to a Participant who continues
his Service after the Effective Date, and, except as otherwise expressly set
forth herein, the rights and benefits, if any, of a Prior Plan Participant (as
herein defined) who terminated his Service prior to the Effective Date shall be
determined under the provisions of the applicable Prior Plan (as herein defined)
in effect on the date his Service terminated.

         NOW, THEREFORE, the Committee hereby merges the NorAm Plan and
Minnegasco Plan into the Prior HII Plan and amends, restates, and continues the
Prior HII Plan in the form of, and by the adoption of, the Plan as herein set
forth, effective April 1, 1999, except as otherwise indicated herein, to read as
follows:

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                                    ARTICLE I

                                   DEFINITIONS

         As used in the Plan, the following words and phrases shall have the
following meanings unless the context clearly requires a different meaning:

         1.1 ACCOUNT: Any of the accounts maintained for a Participant pursuant
to Section 5.1, or all such accounts collectively, as the context requires.

         1.2 AFFILIATE: A corporation or other trade or business which, together
with an Employer, is "under common control" within the meaning of Section 414(b)
or (c), as modified by Section 415(h) of the Code; any organization (whether or
not incorporated) which is a member of an "affiliated service group" (within the
meaning of Section 414(m) of the Code) which includes the Employer; and any
other entity required to be aggregated with the Employer pursuant to regulations
under Section 414(o) of the Code.

         1.3 AFTER-TAX CONTRIBUTIONS: Any amount contributed by a Participant to
the Trust Fund from his Compensation as "After-Tax Matched Contributions"
(formerly referred to as "After-Tax Basic Contributions") and "After-Tax
Unmatched Contributions" (formerly referred to as "After-Tax Excess
Contributions") pursuant to Section 4.3.

         1.4 AFTER-TAX CONTRIBUTION ACCOUNT: The account or accounts maintained
for each Participant to reflect his After-Tax Matched Contributions and
After-Tax Unmatched Contributions, and adjustments relating thereto.

         1.5 ANNIVERSARY DATE: January 1.

         1.6 BENEFICIARY: Such natural person or persons, or the trustee of an
inter vivos trust for the benefit of natural persons, entitled to receive a
Participant's death benefits under the Plan, as provided in Section 6.3 hereof.

         1.7 CODE: The Internal Revenue Code of 1986, as amended.

         1.8 COMMITTEE: The Benefits Committee as described in Article II and,
in regard to any provision of this Plan under which an agent has been appointed
by the Benefits Committee pursuant to Article II to administer such provision of
this Plan, such agent.

         1.9 COMPANY: Prior to May 5, 1999, Houston Industries Incorporated, a
Texas corporation doing business as Reliant Energy, Incorporated, and on and
after May 5, 1999, Reliant Energy, Incorporated or a successor to Reliant
Energy, Incorporated in the ownership of substantially all of its assets.

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         1.10 COMPANY STOCK: Common stock or convertible preferred stock of the
Company which is readily tradeable on an established securities market.

         1.11 COMPENSATION: The total cash compensation actually paid for
personal services to the respective Participant by the Employer during the
applicable payroll period plus any amounts contributed by an Employer pursuant
to a salary reduction agreement under Code Section 401(k) and any amounts not
includable in gross income of the Participant under Code Section 125.
Compensation specifically includes salaries, wages, commissions, overtime pay,
performance-based bonuses paid in cash, and any other payments of compensation
which would be subject to tax under Code Section 3101(a), without the dollar
limitations of Code Section 3121(a)(1). Compensation specifically excludes (i)
expense allowances; (ii) benefits received under the Long-Term Disability Plan
of an Employer; (iii) contributions of the Employer to or benefits under this
Plan or any other welfare or deferred compensation plan not expressly included
above; (iv) any payments made in connection with a Participant's termination of
employment or severance pay; and (v) Compensation taken into account under the
Plan for any Participant during a given Plan Year exceeding $160,000, or such
other dollar amount as may be prescribed by the Secretary of the Treasury or his
delegate from time to time. The Compensation of the respective Participants as
reflected by the books and records of the Employer shall be conclusive.

         1.12 CONTRIBUTION: Any amount contributed to the Trust Fund pursuant to
the provisions of this Plan by the Employer or by a Participant from his
Compensation, including ESOP Contributions, Employer Matching Contributions,
Pre-Tax Matched Contributions, Pre-Tax Unmatched Contributions, After-Tax
Matched Contributions, and After-Tax Unmatched Contributions.

         1.13 DEFINED BENEFIT PLAN: The Reliant Energy, Incorporated Retirement
Plan (formerly the Houston Industries Incorporated Retirement Plan) and/or any
other defined benefit plan (as defined in Section 415(k) of the Code) maintained
by the Company or by any Affiliate.

         1.14 DISABILITY: A disability incurred by a Participant that satisfies
the requirements of Section 6.2.

         1.15 EFFECTIVE DATE: April 1, 1999, except (A) as otherwise provided in
specific provisions of the Plan and (B) that provisions of the Plan required to
have an earlier effective date by application of statute and/or regulation shall
be effective as of the required effective date in such statute and/or
regulation.

         1.16 EMPLOYEE: Any person employed by an Employer, and including (i)
any disabled individual on "Initial LTD Status" or inactive status under the
Long-Term Disability Plan of an Employer and (ii) any "leased employee" (as
defined in Section 414 of the Code, subject to Section 414(n)(5)) performing
services for an Employer. In addition to the above, the term "Employee" shall
include any person receiving remuneration for personal services (or would be
receiving such remuneration except for an authorized leave of absence) rendered
as an employee of

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a foreign affiliate (as defined in Code Section 3121(l)(6)) of an Employer to
which an agreement extending coverage under the Federal Social Security Act
entered into by an Employer under Section 3121(l) of said Code applies, provided
that such person is a citizen or resident of the United States.

         1.17 EMPLOYER: The Company (including its successors) and any other
eligible organization that shall adopt this Plan pursuant to the provisions of
Article X, and the successors, if any, to such organization.

         1.18 EMPLOYER CONTRIBUTIONS: Collectively, the Employer Matching
Contributions and ESOP Contributions.

         1.19 EMPLOYER MATCHING ACCOUNT: The account maintained to reflect the
Employer Matching Contributions to the Plan for each Participant and any
adjustments thereto made pursuant to the provisions of the Plan.

         1.20 EMPLOYER MATCHING CONTRIBUTIONS: Any amount, with the exception of
ESOP Contributions, contributed to the Trust Fund by the Employer pursuant to
Section 4.1.

         1.21 ERISA: Public Law No. 93-406, the Employee Retirement Income
Security Act of 1974, as amended from time to time.

         1.22 ESOP ACCOUNT: The account maintained for each Participant to
reflect the interest in the ESOP Fund allocated to each Participant.

         1.23 ESOP CONTRIBUTIONS: The Employer Contributions to the Trust on
behalf of the ESOP Fund for the purpose of repayment of an Exempt Loan, as
described in Section 4.1.

         1.24 ESOP FUND: The investment fund held by the Trustee which shall be
primarily invested and reinvested in shares of Company Stock.

         1.25 EXEMPT LOAN: Any loan or other extension of credit made or
guaranteed by a disqualified person as defined in Code Section 4975(e)(2) that
is used to finance the purchase of Company Stock by the Trustee and that meets
the requirements of Section 5.6.

         1.26 FIDUCIARIES: The Employer, the Committee, the Trustee, and any
other person designated as a Fiduciary with respect to the Plan or the Trust
Agreement, but only with respect to the specific responsibilities of each as
described in Section 2.13 hereof. Any person or group of persons may serve in
more than one fiduciary capacity with respect to the Plan.

         1.27 FINANCED STOCK: Company Stock acquired with the proceeds of an
Exempt Loan; provided, however, that the number of shares of Financed Stock
shall be proportionately adjusted to

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<PAGE>   12

reflect any share split, share dividend or combination of outstanding shares of
the Company Stock that were acquired with the proceeds of an Exempt Loan.

         1.28 HII PARTICIPANT: A Participant who was participating in the Prior
HII Plan immediately prior to April 1, 1999.

         1.29 INVESTMENT FUND: One of the Investment Funds held under the Trust
Fund, as described in Section 8.1, of which the ESOP Fund is not a part.

         1.30 INVESTMENT MANAGER: The Investment Manager, if any, appointed by
the Committee under the Trust Agreement, as such term is defined by Section
3(38) of ERISA.

         1.31 LEAVE FOR BUSINESS AND CIVIC REASONS: The period of an "Authorized
Absence" (as defined in Section 3.5) taken in order to hold an office or
position in a business or civic organization which has been approved by the
Committee.

         1.32 MINNEGASCO PARTICIPANT: A Participant who was participating in the
Minnegasco Plan immediately prior to April 1, 1999.

         1.33 MINNEGASCO PLAN: The Minnegasco Division Employees' Retirement
Savings Plan as in effect immediately prior to April 1, 1999.

         1.34 NORAM PARTICIPANT: A Participant who was participating in the
NorAm Plan immediately prior to April 1, 1999.

         1.35 NORAM PLAN: The NorAm Employee Savings & Investment Plan as in
effect immediately prior to April 1, 1999.

         1.36 PARTICIPANT: A current or former eligible Employee who, pursuant
to the provisions of Article III hereof, has elected to participate in the Plan,
and who at any relevant time is either making, or has made, Pre-Tax Matched
Contributions and/or After-Tax Matched Contributions to the Plan, and for whom
contribution accounts continue to be held under the Plan. A former Employee
shall be deemed a Participant under the Plan as long as he has an Account in the
Trust Fund which has not been forfeited under Section 6.1 hereof and thus will
be entitled to exercise all the rights and privileges granted active Employees
who are Participants except as otherwise specifically provided in the case of
Participant loans under Section 7.5 hereof.

         1.37 PLAN: The Reliant Energy, Incorporated Savings Plan set forth
herein, which is intended to constitute a profit-sharing plan under Section
401(a)(27) of the Code and an employee stock ownership plan under Section
4975(e)(7) of the Code, including all subsequent amendments hereto.

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         1.38 PLAN YEAR: The 12-month period commencing on January 1 and ending
on December 31.

         1.39 PRE-TAX CONTRIBUTIONS: Any amount deferred by a Participant from
his Compensation as "Pre-Tax Matched Contributions" (formerly referred to as
"Pre-Tax Basic Contributions") and "Pre-Tax Unmatched Contributions" (formerly
referred to as "Pre-Tax Excess Contributions") pursuant to Section 4.2.

         1.40 PRE-TAX CONTRIBUTION ACCOUNT: The account or accounts maintained
for each Participant to reflect his Pre-Tax Matched Contributions and Pre-Tax
Unmatched Contributions to the Plan, and any adjustments thereto made pursuant
to the provisions of the Plan.

         1.41 PRIOR HII PLAN: The Houston Industries Incorporated Savings Plan,
as amended and restated effective July 1, 1995 and as thereafter amended and in
effect on March 31, 1999.

         1.42 PRIOR PLAN: The applicable of (i) the Minnegasco Plan, (ii) the
NorAm Plan and (iii) the Prior HII Plan.

         1.43 PRIOR PLAN ACCOUNTS: The (i) "Prior Plan Matching Account," (ii)
"Prior Plan ESOP Account," (iii) "Cengas Account," and (iv) "Prior Plan 1999
Matching Account," as each such Prior Plan Account is defined in Section 5.1(a).

         1.44 PRIOR PLAN PARTICIPANT: Any person who is in the employment of an
Employer or Affiliate on the Effective Date and was included in and covered by a
Prior Plan immediately prior thereto, or who is the alternate payee,
beneficiary, spouse or estate representative of such a person who died or was
receiving or entitled to receive benefits under a Prior Plan.

         1.45 QUALIFIED MILITARY SERVICE: Any service in the uniformed services
(as defined in Chapter 43 of Title 38 of the United States Code or its
successor) by an Employee who is entitled to reemployment rights under such
chapter with respect to such service.

         1.46 RETIREMENT: Termination of Service on or after the Retirement Date
of a Participant.

         1.47 RETIREMENT DATE: With respect to Participants in the Houston
Industries Incorporated Savings Plan employed prior to January 1, 1988, the term
"Retirement Date" shall mean the first day of the calendar month coincident with
or next following the 65th birthday of a Participant; and, with respect to all
other Participants hired on or after January 1, 1988, such term shall mean the
later of (i) the Participant's attainment of age 65 or (ii) the fifth
anniversary of the Participant's commencement of participation in the Plan.

         1.48 ROLLOVER ACCOUNT: An account maintained for an Employee or
Participant to record rollover contributions to this Plan pursuant to Section
4.16, and any allocations and adjustments thereto.

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<PAGE>   14

         1.49 SERVICE: An Employee's or Participant's period of employment with
an Employer or Affiliate, as determined in accordance with Article III.

         1.50 STOCK SUSPENSE ACCOUNT: The suspense account maintained by the
Trustee in accordance with Section 5.1 and to which will be credited all shares
of Financed Stock prior to the allocation of such shares to the ESOP Accounts in
accordance with Section 5.3.

         1.51 TRUST AGREEMENT: The Reliant Energy, Incorporated Savings Trust,
as amended and restated effective April 1, 1999, as it may hereafter be amended
from time to time.

         1.52 TRUST FUND: All contributions of Employers and Participants, and
the investments and reinvestments thereof, held by the Trustee under the Trust
Agreement, together with all income, profits or increments thereon.

         1.53 TRUSTEE: The Northern Trust Company, an Illinois corporation, or
any successor Trustee or Trustees under the relevant Trust Agreement.

         1.54 VALUATION DATE: Any date on which the New York Stock Exchange is
open for trading and any date on which the value of the assets of the Trust Fund
is determined by the Trustee pursuant to Section 5.2. The last business day of
each March, June, September and December of each Plan Year shall be the
"quarterly Valuation Date" and the last business day of each December of each
Plan Year shall be the "annual Valuation Date."

         1.55 VESTING SERVICE: The period of a Participant's Service considered
in the determination of his eligibility for benefits under the Plan, in
accordance with Article III.

         Words used in this Plan and in the Trust Agreement in the singular
shall include the plural and in the plural the singular, and the gender of words
used shall be construed to include whichever may be appropriate under any
particular circumstances of the masculine, feminine or neuter genders.

                                       -8-
<PAGE>   15

                                   ARTICLE II

                           ADMINISTRATION OF THE PLAN

         2.1 Appointment of Committee: The Board of Directors of the Company
shall appoint a Committee of not less than three persons, who may be Employees
of the Company, to perform the administrative duties set forth herein. The
Committee shall be the administrator of the Plan for the purposes of ERISA. Each
member of the Committee shall serve for such term as the Board of Directors of
the Company may designate or until his death, resignation or removal by the
Board. The Board of Directors of the Company shall promptly appoint successors
to fill any vacancies in the Committee.

         2.2 Records of Committee: The Committee shall keep appropriate records
of its proceedings and the administration of the Plan. The Committee shall make
available to Participants and their Beneficiaries for examination, during
business hours, such records of the Plan as pertain to the examining person and
such documents relating to the Plan as are required by any applicable disclosure
acts.

         2.3 Committee Action: The Committee may act through the concurrence of
a majority of its members expressed either at a meeting of the Committee, or in
writing without a meeting. Any member of the Committee, or the Secretary or
Assistant Secretary of the Committee (who need not be members of the Committee),
may execute on behalf of the Committee any certificate or other written
instrument evidencing or carrying out any action approved by the Committee. The
Committee may delegate any of its rights, powers and duties to any one or more
of its members or to an agent. The Chairman of the Committee shall be agent of
the Plan and the Committee for the service of legal process at the principal
office of the Company in Houston, Texas.

         2.4 Committee Disqualification: A member of the Committee who may be a
Participant shall not vote on any question relating specifically to himself.

         2.5 Committee Compensation and Expenses: The members of the Committee
shall serve without bond (unless otherwise required by law) and without
compensation for their services as such. The Committee may select and authorize
the Trustee to suitably compensate such attorneys, agents and representatives as
it may deem necessary or advisable to the performance of its duties. Expenses of
the Committee that shall arise in connection with the administration of the Plan
shall be paid by the Company or, if not paid by the Company, by the Trustee out
of the Trust Fund.

         2.6 Committee Liability: Except to the extent that such liability is
created by ERISA, no member of the Committee shall be liable for any act or
omission of any other member of the Committee, nor for any act or omission on
his own part except for his gross negligence or willful misconduct, nor for the
exercise of any power or discretion in the performance of any duty assumed by
him hereunder. The Company shall indemnify and hold harmless each member of the
Committee from any and all claims, losses, damages, expenses (including counsel
fees approved by the

                                       -9-
<PAGE>   16

Committee) and liabilities (including any amounts paid in settlement with the
Committee's approval, but excluding any excise tax assessed against any member
or members of the Committee pursuant to the provisions of Section 4975 of the
Code) arising from any act or omission of such member in connection with duties
and responsibilities under the Plan, except where the same is judicially
determined to be due to the gross negligence or willful misconduct of such
member.

         2.7 Committee Determinations: The Committee shall enforce this Plan in
accordance with its terms and shall have all powers necessary for the
accomplishment of that purpose, including, but not by way of limitation, the
following powers:

                  (a) To employ such agents and assistants, such counsel (who
         may be of counsel to the Company) and such clerical, accounting,
         administrative, and investment services as the Committee may require in
         carrying out the provisions of the Plan;

                  (b) To authorize one or more of their number, or any agent, to
         make payment, or to execute or deliver any instrument, on behalf of the
         Committee, except that all requisitions for funds from, and requests,
         directions, notifications, certifications, and instructions to, the
         Trustee (except as provided in (i) below) or to the Company shall be
         signed either by a member of the Committee or by the Secretary or
         Assistant Secretary of the Committee;

                  (c) To determine from the records of the Company the
         considered Compensation, Service and other pertinent facts regarding
         Employees and Participants for the purpose of the Plan;

                  (d) To construe and interpret the Plan, decide all questions
         of eligibility and determine the amount, manner and time of payment of
         any benefits hereunder;

                  (e) To prescribe forms and procedures to be followed by
         Employees for participation in the Plan, by Participants or
         Beneficiaries filing applications for benefits, by Participants
         applying for withdrawals or loans, and for other occurrences in the
         administration of the Plan;

                  (f) To prepare and distribute, in such manner as the Committee
         determines to be appropriate, information explaining the Plan;

                  (g) To furnish the Company and the Participants, upon request,
         such annual reports with respect to the administration of the Plan as
         are reasonable and appropriate;

                  (h) To certify to the Trustee the amount and kind of benefits
         payable to Participants and their Beneficiaries;

                                      -10-
<PAGE>   17

                  (i) To authorize all disbursements by the Trustee from the
         Trust Fund by a written authorization signed either by a member of the
         Committee or by the Secretary or Assistant Secretary of the Committee;
         provided, however, that disbursements for ordinary expenses incurred in
         the administration of the Trust Fund and disbursements to Participants
         need not be authorized by the Committee;

                  (j) In the event of any share split, share dividend or
         combination of outstanding shares of Company Stock, to determine the
         appropriate allocation of shares of Company Stock to the Stock Suspense
         Account and the Accounts maintained for the Participants and to
         determine the appropriate number of shares distributable to a
         Participant under Section 6.6 hereof immediately following such share
         split, share dividend or combination so as to effectuate the intent and
         purpose of the Plan;

                  (k) To interpret and construe all terms, provisions,
         conditions and limitations of this Plan and to reconcile any
         inconsistency or supply any omitted detail that may appear in this Plan
         in such manner and to such extent, consistent with the general terms of
         this Plan, as the Committee shall deem necessary and proper to
         effectuate the Plan for the greatest benefit of all parties interested
         in the Plan;

                  (l) To make and enforce such rules and regulations for the
         administration of the Plan as are not inconsistent with the terms set
         forth herein; and

                  (m) In addition to all other powers herein granted, and in
         general consistent with provisions hereof, the Committee shall have all
         other rights and powers reasonably necessary to supervise and control
         the administration of this Plan.

         2.8 Information from Employer: To enable the Committee to perform its
functions, the Employer shall supply full and timely information to the
Committee of all matters relating to the dates of employment of its Employees
for purposes of determining eligibility of Employees to participate hereunder,
the Compensation of all Participants, their Retirement, death or other cause for
termination of employment, and such other pertinent facts as the Committee may
require; and the Committee shall advise the Trustee of such of the foregoing
facts as may be pertinent to the Trustee's administration of the Trust Fund.

         2.9 Uniform Administration: Whenever in the administration of the Plan
any action is required by the Employer or the Committee, including, but not by
way of limitation, action with respect to eligibility of Employees,
Contributions, and benefits, such action shall be uniform in nature as applied
to all persons similarly situated, and no action shall be taken which will
discriminate in favor of Participants who are officers or shareholders of the
Employer, highly compensated Employees, or persons whose principal duties
consist of supervising the work of others.

                                      -11-
<PAGE>   18

         2.10 Reporting Responsibilities: As administrator of the Plan under
ERISA, the Committee shall file or distribute all reports, returns and notices
required under ERISA or other applicable law.

         2.11 Disclosure Responsibilities: The Committee shall make available to
each Participant and Beneficiary such records, documents and other data as may
be required under ERISA, and Participants or Beneficiaries shall have the right
to examine such records at reasonable times during business hours. Nothing
contained in this Plan shall give any Participant or Beneficiary the right to
examine any data or records reflecting the Compensation paid to, or relating to
any Account of, any other Participant or Beneficiary, except as may be required
under ERISA.

         2.12 Quarterly Statements: As soon as practicable after each quarterly
Valuation Date, the Committee shall prepare and deliver to each Participant a
written statement reflecting as of that quarterly Valuation Date:

                  (a) Such information applicable to contributions by and for
         each such Participant and the increase or decrease thereof as a
         consequence of valuation adjustments as may be pertinent in the
         premises; and

                  (b) The balance in his Account as of that quarterly Valuation
         Date.

         2.13 Allocation of Responsibility Among Fiduciaries for Plan and Trust
Administration: The Fiduciaries shall have only those specific powers, duties,
responsibilities and obligations as are specifically given them under this Plan
or the Trust Agreement. In general, the Employer shall have the sole
responsibility for making the Contributions provided for under Sections 4.1, 4.2
and 4.3. The Company shall have the sole authority to appoint and remove the
Trustee and members of the Committee. The Company may amend or terminate, in
whole or in part, this Plan or the Trust Agreement. The Committee shall have the
sole responsibility for the administration of the Plan and the sole authority to
appoint and remove any Investment Manager which may be provided for under the
Trust. The Trustee shall have the sole responsibility for the administration of
the Trust Fund and shall have exclusive authority and discretion to manage and
control the assets held under the Trust Fund, except to the extent that the
authority to manage, acquire and dispose of the assets of the Trust Fund is
delegated to an Investment Manager, all as specifically provided in the Trust
Agreement. Each Fiduciary warrants that any directions given, information
furnished, or action taken by it shall be in accordance with the provisions of
the Plan or the Trust Agreement, as the case may be, authorizing or providing
for such direction, information or action. Furthermore, each Fiduciary may rely
upon any such direction, information or action of another Fiduciary as being
proper under this Plan or the Trust Agreement and is not required under this
Plan or the Trust Agreement to inquire into the propriety of any such direction,
information or action. It is intended under this Plan and the Trust Agreement
that each Fiduciary shall be responsible for the proper exercise of its own
powers, duties, responsibilities and obligations under this Plan and the Trust
Agreement and shall not be responsible for any act or failure to act of another
Fiduciary. No Fiduciary guarantees the Trust Fund in any manner against
investment loss or depreciation in asset value.

                                      -12-
<PAGE>   19

         2.14 Annual Audit: The Committee shall engage, on behalf of all
Participants, an independent Certified Public Accountant who shall conduct an
annual examination of any financial statements of the Plan and Trust Fund and of
other books and records of the Plan and Trust Fund as the Certified Public
Accountant may deem necessary to enable him to form and provide a written
opinion as to whether the financial statements and related schedules required to
be filed with the Internal Revenue Service, Securities and Exchange Commission,
or Department of Labor or furnished to each Participant are presented fairly and
in conformity with generally accepted accounting principles applied on a basis
consistent with that of the preceding Plan Year. If, however, the statements
required to be submitted as part of the reports to the Department of Labor are
prepared by a bank or similar institution or insurance carrier regulated and
supervised and subject to periodic examination by a state or federal agency and
if such statements are, in fact, made a part of the annual report to the
Department of Labor and no such audit is required by ERISA, then the audit
required by the foregoing provisions of this Section shall be optional with the
Committee.

         2.15 Presenting Claims for Benefits: Any Participant or any other
person claiming under any deceased Participant may submit written application to
the Committee for the payment of any benefit asserted to be due him under the
Plan. Such application shall set forth the nature of the claim and such other
information as the Committee may reasonably request. Promptly upon the receipt
of any application required by this Section, the Committee shall determine
whether or not the Participant or Beneficiary involved is entitled to a benefit
hereunder and, if so, the amount thereof and shall notify the applicant of its
findings.

                  The Committee shall notify the applicant of the benefits
determination within a reasonable time after receipt of the claim, such time not
to exceed 90 days unless special circumstances require an extension of time for
processing the application. If such an extension of time for processing is
required, written notice of the extension shall be furnished to the applicant
prior to the end of the initial 90-day period. In no event shall such extension
exceed a period of 90 days from the end of such initial period. The extension
notice shall indicate the special circumstances requiring an extension of time
and the date by which the Committee expects to render its final decision. Notice
of the Committee's decision to deny a claim in whole or in part shall be set
forth in a manner calculated to be understood by the applicant and shall contain
the following:

                  (a) the specific reason or reasons for the denial;

                  (b) specific reference to the pertinent Plan provisions on
         which the denial is based;

                  (c) a description of any additional material or information
         necessary for the applicant to perfect the claim and an explanation of
         why such material or information is necessary; and

                                      -13-
<PAGE>   20

                  (d) an explanation of the claims review procedures set forth
         in Section 2.16 hereof.

If notice of denial is not furnished and if the claim is not granted within the
period of time set forth above, the claim shall be deemed denied for purposes of
proceeding to the review stage described in Section 2.16. Participants shall be
given timely written notice of the time limits set forth herein for
determination on claims, appeal of claim denial and decisions on appeal.

         2.16 Claims Review Procedure: If an application filed by a Participant
or Beneficiary under Section 2.15 above shall result in a denial by the
Committee of the benefit applied for, either in whole or in part, such applicant
shall have the right, to be exercised by written request filed with the
Committee within 60 days after receipt of notice of the denial of his
application or, if no such notice has been given, within 60 days after the
application is deemed denied under Section 2.15, for the review of his
application and of his entitlement to the benefit for which he applied. Such
request for review may contain such additional information and comments as the
applicant may wish to present. The Committee shall reconsider the application in
light of such additional information and comments as the applicant may have
presented and, if the applicant shall have so requested, may grant the applicant
a formal hearing before the Committee in its discretion. The Committee shall
also permit the applicant or his designated representative to review pertinent
documents in its possession, including copies of the Plan document and
information provided by the Employer relating to the applicant's entitlement to
such benefit. The Committee shall render a decision no later than the date of
the Committee meeting next following receipt of the request for review, except
that (i) a decision may be rendered no later than the second following Committee
meeting if the request is received within 30 days of the first meeting and (ii)
under special circumstances which require an extension of time for rendering a
decision (including but not limited to the need to hold a hearing), the decision
may be rendered not later than the date of the third Committee meeting following
the receipt of the request for review. If such an extension of time for review
is required because of special circumstances, written notice of the extension
shall be furnished to the applicant prior to the commencement of the extension.
Notice of such final determination of the Committee shall be furnished to the
applicant in writing, in a manner calculated to be understood by him, and shall
set forth the specific reasons for the decision and specific references to the
pertinent provisions of the Plan upon which the decision is based. If the
decision on review is not furnished within the time period set forth above, the
claim shall be deemed denied on review.

         2.17 Disputed Benefits: If any dispute shall arise between a
Participant or other person claiming under a Participant and the Committee after
review of a claim for benefits, or in the event any dispute shall develop as to
the person to whom the payment of any benefit under the Plan shall be made, the
Trustee may withhold the payment of all or any part of the benefits payable
hereunder to the Participant or other person claiming under the Participant
until such dispute has been resolved by a court of competent jurisdiction or
settled by the parties involved.

                                      -14-
<PAGE>   21

                                   ARTICLE III

                            PARTICIPATION IN THE PLAN

         3.1 Eligibility of Employees: An Employee eligible to participate under
the applicable Prior Plan immediately preceding the Effective Date shall be
eligible to become a Participant in this Plan as of the Effective Date. From and
after the Effective Date, each Employee who is eligible and who is not a
Participant and who began Service with an Employer on or after April 1, 1999
shall be initially eligible to participate in the Plan as soon as practicable
following the later of (i) the Effective Date or (ii) the date he first began
Service with such Employer. Notwithstanding the foregoing, each of the following
individuals shall be ineligible to participate in this Plan: (i) an Employee who
is employed as a building trades worker under a construction industry collective
bargaining agreement providing specifically for retirement benefit payments to
be made thereunder for such building trades worker; (ii) an Employee who is a
"leased employee" as defined in Section 414(n) of the Code; (iii) an individual
who is designated, compensated, or otherwise classified or treated as an
independent contractor by an Employer or an Affiliate; and (iv) an individual
who is a non-resident alien and who receives no United States source earned
income from the Employer.

         3.2 Employee Information: The Committee shall maintain records which
shall reflect as to each Employee his date of birth, all dates reflecting when
he entered into or left the employment of any Employer, and his years of Vesting
Service. The Employer shall make available to the Committee all such information
as may be required by the Committee for the purposes of maintaining such
information as to each Employee.

         3.3 Notification of Eligible Employees: Each eligible Employee shall be
notified that he is eligible to participate in the Plan upon commencement of his
Service as soon as administratively practicable.

         3.4 Application by Participants: Each Employee who shall become
eligible to participate in the Plan and who shall desire to become a Participant
shall complete an application in such form as may be prescribed by the Committee
in which the Participant shall elect to make and designate the amount of his
Contributions, as contemplated under Sections 4.2 and 4.3 hereof, and his choice
of investment options under Section 8.1 hereof.

         3.5 Service Defined: For purposes of the Plan, the term "Service" shall
mean the following:

                  (a) With respect to Service prior to April 1, 1999, (i) for
         Minnegasco Participants and NorAm Participants, all service determined
         in accordance with the provisions of the Minnegasco Plan and NorAm
         Plan, respectively, as of March 31, 1999; and (ii) for HII
         Participants, all service determined based on each HII Participant's
         service under the Reliant Energy, Incorporated Retirement Plan

                                      -15-
<PAGE>   22

         (formerly) the Houston Industries Incorporated Retirement Plan) as of
         October 31, 1998, with such service increased by one year.

                  (b) With respect to Service after March 31, 1999, all years,
         months and days of active employment with an Employer or an Affiliate
         from and after April 1, 1999 as an Employee, a Participant or a
         Participant on inactive status, as described in Section 3.11
         ("Transferred Participant"), including periods includable under
         Sections 3.8 and 3.9, and the following periods of "Authorized Absence"
         during which a Participant or Transferred Participant is:

                           (i) Absent due to Qualified Military Service,
                  provided that such Employee or Participant complies with all
                  prerequisites of applicable Federal law and applied for
                  reinstatement of employment pursuant to the procedures and
                  requirements of the Employer and, if applicable, the
                  Committee, to the extent consistent with applicable Federal
                  law; or

                           (ii) Absent due to accident or sickness as long as
                  the Employee or Participant is continued on the employment
                  rolls of the Employer and remains eligible to work upon his
                  recovery, provided that such Employee or Participant timely
                  applied for reinstatement of employment following his date of
                  recovery in accordance with the procedures and requirements of
                  the Employer and, if applicable, the Committee; or

                           (iii) Absent due to an authorized leave of absence,
                  including periods of Leave for Business and Civic Reasons,
                  subject to such conditions as may be approved by the Committee
                  consistently applied in a uniform and non-discriminatory
                  manner to all employees similarly situated.

                  (c) An Employee's or Participant's Service shall also include
         any period required to be included as Service by federal law other than
         ERISA or the Code, but only under the conditions and to the extent so
         required by such federal law. In addition, the Committee, in its
         discretion, may credit an individual with Service based on employment
         with an entity other than the Employer, but only if and when such
         individual becomes an Employee eligible to participate in the Plan
         under this Article III and only if such crediting of Service (i) has a
         legitimate business reason, (ii) does not by design or operation
         discriminate significantly in favor of "highly compensated employees"
         (as defined in Code Section 414(q)), and (iii) is applied to all
         similarly-situated Employees eligible to participate in the Plan under
         this Article III. Furthermore, in the event that the Plan constitutes a
         plan of a predecessor employer within the meaning of section 414(a) of
         the Code, service for such

                                      -16-
<PAGE>   23

         predecessor employer shall be treated as Service to the extent required
         by Section 414(a) of the Code.

         3.6 Commencement and Termination of Service:

                  (a) From and after April 1, 1999, an Employee's or
         Participant's Service shall commence (or recommence) on the date he
         first performs an "hour of service" within the meaning of Department of
         Labor Regulation Section 2530.200b-2(a)(1) for an Employer or
         Affiliate. All periods of Service shall be aggregated so that a
         one-year period of Service shall be completed as of the date the
         Employee or Participant completes 365 days of Service. Hours of service
         and Service will be credited for employment with other members of an
         affiliated service group (under Code Section 414(m)), a controlled
         group of corporations (under Code Section 414(b)), or a group of trades
         or businesses under common control (under Code Section 414(c)), of
         which the Employer is a member.

                  (b) Except as otherwise provided in this Article III, a period
         of Service of an Employee or Participant shall terminate on the date of
         the first to occur of:

                           (i)      His Retirement or death;

                           (ii)     His quitting or discharge;

                           (iii) His deemed date of termination of employment
                  pursuant to his failure to return to work upon the expiration
                  of such an Authorized Absence; or

                           (iv) One year from the date the Employee or
                  Participant is absent from active employment for any reason
                  other than Retirement, quitting, discharge, Authorized Absence
                  or death.

         For purposes of clause (iii) immediately above, an Employee's or
         Participant's deemed date of termination shall be the earlier of (1)
         the expiration date of such Authorized Absence or (2) one year from the
         date such Authorized Absence commenced. Notwithstanding any provision
         of this Plan to the contrary, contributions, benefits and service
         credit with respect to Qualified Military Service will be provided in
         accordance with Section 414(u) of the Code.

         3.7       Break In Service:

                  (a) With respect to a termination of Service occurring prior
         to April 1, 1999, a Break in Service shall be determined in accordance
         with the "break in service" provisions of the applicable Prior Plan.
         For purposes of eligibility and vesting, any

                                      -17-
<PAGE>   24

         Employee or Participant who has a Break In Service commencing prior to
         April 1, 1999 shall have his rights surrounding such Break In Service
         determined in accordance with the provisions of the applicable Prior
         Plan in which he participated.

                  (b) With respect to a termination of Service occurring from
         and after April 1, 1999, a Break In Service shall occur upon the
         expiration of the 12 consecutive month period next following an
         Employee's or a Participant's termination of Service, as determined in
         accordance with the provisions of Section 3.6(b), unless such Employee
         or Participant sooner recommences Service with an Employer or
         Affiliate. In the event an Employee or Participant recommences Service
         with an Employer or Affiliate prior to incurring a Break In Service,
         the period of his interim absence shall constitute Service for all
         purposes of the Plan, as provided under Section 3.8 below.

                  (c) Solely for purposes of determining whether a Break In
         Service has occurred under this Plan, the Service of an individual who
         is absent from work for maternity or paternity reasons shall not
         terminate until the expiration of two years after the date such absence
         commenced. For purposes of this paragraph, an absence from work for
         maternity or paternity reasons means an absence (i) by reason of the
         pregnancy of the Employee or Participant, (ii) by reason of the birth
         of a child of the Employee or Participant, (iii) by reason of the
         placement of a child with the Employee or Participant in connection
         with the adoption of such child by such Employee or Participant or (iv)
         for purposes of caring for such child for a period beginning
         immediately following such birth or placement. In order for the absence
         of a Participant or an Employee to qualify as a maternity/paternity
         leave, the Participant must furnish the Committee in a timely manner,
         with such information and documentation as the Committee shall
         reasonably require to establish that the absence from work is for the
         reasons referred to above and the number of days for which there was
         such absence.

                  (d) Notwithstanding any provision of this Article III to the
         contrary, for purposes of determining eligibility to participate and
         vesting under the Plan, Service shall be continued during any leave
         taken pursuant to the Family and Medical Leave Act of 1993 and no Break
         In Service shall occur due, in whole or in part, to such leave.

         3.8 Effect of Re-employment Prior to a Break In Service: In the event
an Employee or Participant is re-employed by an Employer or Affiliate prior to a
Break In Service, the period of his interim absence shall constitute Service for
eligibility and vesting purposes under the Plan.

         3.9 Effect of Re-employment After a Break In Service: In the event an
Employee or Participant is re-employed by an Employer or Affiliate after a Break
In Service, the following rules

                                      -18-
<PAGE>   25

shall apply in determining his participation in the Plan under Section 3.1 and
his Vesting Service under Section 3.10:

                  (a) Participation: If the re-employed person was not a
         Participant during his prior period of Service, he shall be eligible to
         commence participation in the Plan on the date of his re-employment if
         he otherwise meets the requirements of Section 3.1. If the re-employed
         Employee was a Participant during his prior period of Service, he shall
         recommence participation in the Plan on the date of his re- employment
         if he otherwise meets the requirements of Section 3.1, and any
         forfeitures from his Employer Matching Account and ESOP Account shall
         be reinstated to the extent provided in Section 6.9.

                  (b) Vesting Service: Any Vesting Service attributable to the
         re-employed Employee's prior period of Service shall be reinstated as
         of the date of his recommencement of participation in the Plan.

                  3.10 Vesting Service: Subject to the Break In Service
         provisions of this Article III, a Participant's Vesting Service shall
         equal the sum of the following:

                  (a) Vesting Service prior to April 1, 1999, which shall be (i)
         for a Minnegasco or NorAm Participant, his Vesting Service as defined
         under the Minnegasco Plan or NorAm Plan, as applicable, with respect to
         Service earned prior to April 1, 1999, and (ii) for an HII Participant,
         his Vesting Service determined under the Prior HII Plan, with respect
         to Service earned prior to April 1, 1999, as determined under Section
         3.5(a); and

                  (b) Vesting Service on and after April 1, 1999, which shall be
         earned for each day of Service after the Participant's employment date
         with an Employer or Affiliate.

         3.11 Transferred Participants:

                  (a) For purposes of determining eligibility to participate in
         the Plan and Vesting Service under this Article III, a Participant's
         Service shall include his employment with an Affiliate after it becomes
         an Affiliate; provided, however, that all such employment is determined
         in accordance with the re-employment provisions of Section 3.8 and 3.9.
         If an individual is transferred from an employment classification with
         an Employer that is not covered by the Plan to an employment
         classification that is so covered, or from an Affiliate that is not an
         Employer to an employment classification with an Employer that is so
         covered, his period of Service prior to the date of transfer shall be
         considered for purposes of determining his eligibility to become a
         Participant under Section 3.1 and for purposes of vesting under Section
         6.1. In addition, if such transferred Participant had an account in a
         qualified defined

                                      -19-
<PAGE>   26

         contribution plan maintained by such Affiliate, such account shall be
         transferred to the Trust Fund under this Plan if the transfer is
         permitted by the terms of said plan and if the Committee determines
         that the transferred account will not fail to satisfy Section 401(a) or
         411(d)(6) of the Code. Any transferred account shall be subject to the
         provisions of this Plan; provided, however, that the vesting provisions
         of the transferor plan shall continue to apply.

                  (b) If a Participant is transferred to employment with an
         Employer or Affiliate which is not eligible employment covered by the
         Plan, his participation in the Plan shall be suspended; provided,
         however, that during the period of his employment in such ineligible
         position:

                           (i) Subject to the re-employment provisions of
                  Sections 3.8 and 3.9, he shall be credited with Service in
                  accordance with this Article III;

                           (ii) He shall cease to have any right to make
                  Contributions pursuant to Sections 4.2 and 4.3;

                           (iii) His Employer Matching Account and ESOP Account
                  shall receive no Employer Matching Contribution or ESOP
                  Contribution allocations under Section 4.1;

                           (iv) He shall continue to participate in income
                  allocations of the earnings and/or losses of the Trust Fund
                  pursuant to Section 5.3;

                           (v) No distribution event shall be deemed to have
                  occurred under Section 6.1; and

                           (vi) The loan privileges under Article VII and the
                  provisions of Article VIII shall continue to apply.

                           In addition, the Committee may, at its discretion,
         authorize the transfer of his Accounts under this Plan to the Trust
         Fund funding the qualified defined contribution plan, if any, of the
         Affiliate to which the Participant was transferred. In such event, the
         provisions of the transferee plan shall govern.

                  (c) In addition and with respect to only those Participants
         who previously had an account established under the STP Nuclear
         Operating Company Savings Plan as of October 1, 1997, prior to their
         employment after such date by an Employer covered by this Plan, the
         period of employment of such Participant by STP Nuclear Operating
         Company, a Texas nonprofit corporation, shall be deemed to be

                                      -20-
<PAGE>   27

         employment by an Affiliate hereunder for purposes of eligibility and
         vesting and shall be calculated as provided in Section 3.11(a) above.

                                      -21-
<PAGE>   28

                                   ARTICLE IV

                            CONTRIBUTIONS TO THE PLAN

         4.1 Employer Contributions: For each Plan Year during which an Exempt
Loan is outstanding, the Employer shall make an ESOP Contribution to the Trust
Fund in such amount and at such times as shall be determined by the Company.

                  The Employer shall also make an Employer Matching Contribution
(subject to adjustments for forfeitures and limitations on annual additions as
elsewhere specified in the Plan) in the amount, if any, necessary to result in a
total allocation under Article V to each Participant's ESOP Account of not less
than 75% of the total of his Pre-Tax Matched Contribution and After-Tax Matched
Contribution for the Plan Year. Further, the Employer shall make an additional
ESOP Contribution and/or Employer Matching Contribution, if necessary, to make
the allocation required under Section 5.3(d)(ii) with respect to dividends used
to repay an Exempt Loan.

                  In addition, for any Plan Year, the Employer, in its
discretion, may make an additional Employer Matching Contribution in an amount
(1) determined by the Chairman of the Committee on behalf of (i) Participants
who are in active Service as of the last day of the applicable Plan Year and
(ii) Participants (A) whose Service terminates during the applicable Plan Year
and who are age 55 or older with five years of Service as of such termination
date or (B) whose Service terminates during the applicable Plan Year due to
death or Disability, and (2) communicated to such eligible Participants within
90 days following the close of the applicable Plan Year.

                  To the extent specified in Section 5.3(d)(iii), any amounts
attributable to forfeitures will be applied to reduce, to the extent of such
forfeitures, the Employer Matching Contributions required to be made next
following the determination of any such forfeiture amounts and/or pay incident
expenses of the Plan.

                  In the event that a forfeiture arising under Section 6.1 is
reinstated under Section 6.9 because of the return to the employment of the
terminated Participant, or in the event that a forfeiture arising under Section
6.11 is reinstated in accordance with the provisions of Section 6.11 because of
an appropriate claim of forfeited unclaimed benefit by the Participant,
Beneficiary or other distributee, the Employer shall contribute, within a
reasonable time following such re-employment or claim, an amount equal to the
forfeiture to be reinstated.

        4.2 Pre-Tax Contributions: Each Participant who has elected to defer a
portion of his salary as a Pre-Tax Matched Contribution to the Plan pursuant to
Section 3.4 shall defer as his Pre-Tax Matched Contribution to the Trust Fund
1%, 2%, 3%, 4%, 5% or 6%, as he may designate, of his Compensation. In addition,
each Participant may also elect to defer any whole percent, up to a maximum of
10%, of his Compensation as a Pre-Tax Unmatched Contribution. Each Participant's
Pre-Tax Matched Contribution and Pre-Tax Unmatched Contribution, if any, shall
be contributed to the Trust Fund by the Employer as soon as practicable. A
Participant's Pre-Tax Contributions

                                      -22-
<PAGE>   29

under this Plan and all other plans, contracts or arrangements of the Employer
shall not exceed a maximum contribution of $10,000, as adjusted by the Secretary
of the Treasury or his delegate, for each calendar year. In the event a
Participant's Pre-Tax Contributions exceed the applicable limit described in the
preceding sentence, or in the event the Participant submits a written claim
under the Plan, at the time and in the manner prescribed by the Committee,
specifying an amount of Pre-Tax Contributions that will exceed the applicable
limit of Section 402(g) of the Code when added to the amounts deferred by the
Participant in other plans or arrangements, such excess (the "Excess
Deferrals"), plus any income and minus any loss allocable to such amount, shall
be returned to the Participant by the April 15 of the following year. Excess
Deferrals shall be treated as Annual Additions under Section 5.5 of the Plan.
Each Participant's Pre-Tax Contribution Account shall be fully vested and
non-forfeitable at all times.

                  When first electing to participate in the Plan, each
Participant shall give advance notification by electronic, telephonic, written
or other such manner as may be prescribed from time to time by the Committee, of
the amount he elects to defer as a Pre-Tax Matched Contribution and as a Pre-Tax
Unmatched Contribution. Each such election shall continue in effect during
subsequent Plan Years unless the Participant shall give timely notice of his
election to change or discontinue his Pre-Tax Matched Contribution or his
Pre-Tax Unmatched Contribution in accordance with procedures established from
time to time by the Committee.

                  A Participant may change the rate of his Pre-Tax Matched
Contribution and/or Pre-Tax Unmatched Contribution, with no restrictions on
frequency, by electronic, telephonic, written or other such manner as may be
prescribed from time to time by the Committee. A Participant may discontinue his
Pre-Tax Matched Contribution and/or Pre-Tax Unmatched Contribution, with no
restrictions on frequency, by electronic, telephonic, written or other such
manner as may be prescribed from time to time by the Committee. Any such change
or discontinuance in the rate of Pre-Tax Matched and/or Unmatched Contributions
shall be effective as soon as reasonably practicable following receipt of the
change or discontinuance of elections.

        4.3 After-Tax Contributions: Each Participant who has elected to make a
Pre-Tax Matched Contribution of less than 6% of his Compensation may elect to
make an After-Tax Matched Contribution to the Plan pursuant to Section 3.4 of
1%, 2%, 3%, 4%, 5% or 6%, as he may designate, of his Compensation, provided
that the total of his Pre-Tax Matched Contribution, if any, and his After-Tax
Matched Contribution does not exceed 6% of his Compensation. In addition, each
Participant who has elected to make a Pre-Tax Unmatched Contribution of less
than 10% of his Compensation may elect to contribute to the Plan any whole
percent, up to a maximum of 10%, of his Compensation as an After-Tax Unmatched
Contribution; provided, however, that the total of his Pre-Tax Unmatched
Contribution, if any, and his After-Tax Unmatched Contribution does not exceed
10% of his Compensation. Each Participant's After-Tax Matched Contribution and
After-Tax Unmatched Contribution, if any, shall be withheld from each of his
paychecks and contributed to the Trust Fund by the Employer as soon as
practicable. Each Participant's After-Tax Contribution Account shall be fully
vested and non-forfeitable at all times.

                                      -23-
<PAGE>   30

                  When first electing to participate in the Plan, each
Participant shall give advance notification by electronic, telephonic, written
or other such manner as may be prescribed from time to time by the Committee, of
the amount he elects to contribute as an After-Tax Matched Contribution and as
an After-Tax Unmatched Contribution. Each such election shall continue in effect
during subsequent Plan Years unless the Participant shall give timely notice of
his election to change or discontinue his After-Tax Matched Contribution or his
After-Tax Unmatched Contribution in accordance with procedures established from
time to time by the Committee.

                  A Participant may change the amount of his After-Tax Matched
Contribution and/or After-Tax Unmatched Contribution, with no restrictions on
frequency, by electronic, telephonic, written or other such manner as may be
prescribed from time to time by the Committee. A Participant may discontinue his
After-Tax Matched Contribution and/or After-Tax Unmatched Contribution, with no
restrictions on frequency, by electronic, telephonic, written or other such
manner as may be prescribed from time to time by the Committee. Any such change
or discontinuance in the amount of After-Tax Matched or Unmatched Contributions
shall be effective as soon as reasonably practicable following receipt of the
change or discontinuance of elections.

        4.4 Actual Deferral Percentage: The Actual Deferral Percentage for a
specified group of Employees for a Plan Year shall be the average of the ratios
(calculated separately for each Employee in such group) of:

                  (a) the amount of Pre-Tax Contributions (i) allocated to each
         such Employee's Account under the Plan as of a date during the Plan
         Year, without contingency on future participation in the Plan or
         performance of future services, (ii) actually paid to the Plan on
         behalf of each such Employee for such Plan Year no later than the end
         of the 12-month period immediately following such Plan Year and (iii)
         that relate to Compensation that either would have been received by the
         Employee in such Plan Year (but for the deferral election) or are
         attributable to services performed by the Employee in the Plan Year and
         would have been received by the Employee within 2 1/2 months after the
         close of the Plan Year (but for the deferral election); over

                  (b) the Employee's Compensation (as defined in Treasury
         Regulation Section 1.414(s)-1(c)) for such Plan Year.

                  The Plan uses the Actual Deferral Percentage for Participants
who are Highly Compensated Employees (as defined in Section 4.5) for the current
Plan Year and the Actual Deferral Percentage for Participants who are non-Highly
Compensated Employees (1) for the current Plan Year, effective January 1, 1997
through December 31, 1998, and (2) for the preceding Plan Year, effective from
and after January 1, 1999, in performing the nondiscrimination testing required
under this Section IV. Notwithstanding any provision in this Plan to the
contrary, an Employer may, to the extent permitted by the Code and applicable
regulations, elect to include as Compensation pre-tax or after-tax contributions
made under this Plan or any other plan of the Employer, and may

                                      -24-
<PAGE>   31

elect to exclude as Compensation any Compensation received by a Participant
during the Plan Year while such Participant was not eligible to be a Participant
in the Plan.

                  An eligible Employee for the purpose of computing the Actual
Deferral Percentage is defined in Treasury Regulation Section 1.401(k)-1(g)(4).
The Actual Deferral Percentage of an eligible Employee who makes no Pre-Tax
Contributions is zero. The individual ratios and Actual Deferral Percentages
shall be calculated to the nearest 1/100 of 1% of an Employee's Compensation.

        4.5 Actual Deferral Percentage Limits: The Actual Deferral Percentage
for the eligible Highly Compensated Employees for any Plan Year shall not exceed
the greater of (a) or (b), as follows:

                  (a) the Actual Deferral Percentage of Compensation for the
         eligible non-Highly Compensated Employees times 1.25; or

                  (b) the lesser of (i) the Actual Deferral Percentage of
         Compensation for the eligible non-Highly Compensated Employees times
         2.0 or (ii) the Actual Deferral Percentage of Compensation for the
         eligible non-Highly Compensated Employees plus two percentage points or
         such lesser amount as the Secretary of the Treasury shall prescribe to
         prevent the multiple use of this alternative limitation with respect to
         any Highly Compensated Employee.

                  "Highly Compensated Employee" shall mean any Employee and any
employee of an Affiliate who is a highly compensated employee under Section
414(q) of the Code, including any Employee and any employee of an Affiliate who:

                           (i) was a "5% owner" (as defined in Code Section
                  416(i)) during the current Plan Year or prior Plan Year; or

                           (ii) received Compensation during the prior Plan Year
                  (as defined in Section 5.5(d)(6)) in excess of $80,000, or
                  such other amount as determined by the Secretary of the
                  Treasury or his delegate, and, if elected by the Employer, was
                  in the "top-paid group" (the top 20% of payroll) for the Plan
                  Year, excluding Employees described in Code Section 414(q)(8).

                  In determining an Employee's status as a Highly Compensated
Employee within the meaning of Section 414(q), the entities set forth in
Treasury Regulation Section 1.414(q)-1T Q&A-6(a)(1) through (4) must be taken
into account as a single employer.

                  A former Employee shall be treated as a Highly Compensated
Employee if (1) such former Employee was a Highly Compensated Employee when he
separated from Service or (2) such former Employee was a Highly Compensated
Employee in Service at any time after attaining age 55.

                                      -25-
<PAGE>   32

                  The Actual Deferral Percentage for any Highly Compensated
Employee who is eligible to have deferred contributions allocated to his account
under one or more plans described in Section 401(k) of the Code that are
maintained by an Employer or an Affiliate in addition to this Plan shall be
determined as if all such contributions were made to this Plan. For purposes of
determining whether the Actual Deferral Percentage limits of this Section are
satisfied, all Pre-Tax Contributions that are made under two or more plans that
are aggregated for purposes of Code Section 401(a)(4) or 410(b) (other than Code
Section 410(b)(2)(A)(ii)) are to be treated as made under a single plan, and if
two or more plans are permissively aggregated for purposes of Code Section
401(k), the aggregated plans must also satisfy Code Sections 401(a)(4) and
410(b) as though they were a single plan.

        4.6 Reduction of Pre-Tax Contribution Rates by Leveling Method: If, on
the basis of the Pre-Tax Contribution rates elected by Participants for any Plan
Year, the Committee determines, in its sole discretion, that neither of the
tests contained in (a) or (b) of Section 4.5 will be satisfied, the Committee
may reduce the Pre-Tax Contribution rate of any Participant who is among the
eligible Highly Compensated Employees to the extent necessary to reduce the
overall Actual Deferral Percentage for eligible Highly Compensated Employees to
a level which will satisfy either (a) or (b) of Section 4.5. The reductions in
Pre-Tax Contribution rates shall be made in a manner so that the Actual Deferral
Percentage of the affected Participants who elected the highest Actual Deferral
Percentage shall be first lowered to the level of the affected Participants who
elected the next to the highest Actual Deferral Percentage. If further overall
reductions are required to achieve compliance with (a) or (b) of Section 4.5,
both of the above-described groups of Participants will be lowered to the level
of Participants with the next highest Actual Deferral Percentage, and so on,
until sufficient total reductions in Pre-Tax Contribution rates have occurred to
achieve compliance with (a) or (b) of Section 4.5. The Committee may, in its
discretion, permit a Participant whose Pre-Tax Contributions are reduced under
this paragraph to contribute a like amount to his After-Tax Contribution
Account.

        4.7 Increase in Pre-Tax Contribution Rates: If a Participant's Pre-Tax
Contribution is reduced below the level necessary to satisfy either (a) or (b)
of Section 4.5 for the Plan Year, such Participant may be eligible to increase
his Pre-Tax Contribution rate for the remainder of the Plan Year to a level not
in excess of that level which will satisfy the greater of (a) or (b) of Section
4.5. Such an increase in the Pre-Tax Contribution rate shall be made by
Participants on a uniform and non-discriminatory basis, pursuant to such rules
and procedures as the Committee may prescribe.

        4.8 Excess Pre-Tax Contributions: As soon as possible following the end
of the Plan Year, the Committee shall determine whether either of the tests
contained in Section 4.5 were satisfied as of the end of the Plan Year, and any
excess Pre-Tax Contributions, plus any income and minus any loss attributable
thereto, of those Participants who are among the Highly Compensated Employees
shall be distributed to such Participants in the manner provided below based on
the amount of Pre-Tax Contributions. In addition, the Employer Contribution made
with respect to such excess Pre-Tax Contributions shall be forfeited and applied
to reduce future Employer Contributions

                                      -26-
<PAGE>   33

otherwise required under Section 4.1. Such income shall include the allocable
gain or loss for the Plan Year only.

                  The amount of any excess Pre-Tax Contributions to be
distributed to a Participant shall be reduced by Excess Deferrals previously
distributed to him pursuant to Section 4.2 for the taxable year ending in the
same Plan Year. All excess Pre-Tax Contributions shall be returned to the
Participants no later than the last day of the following Plan Year. The excess
Pre-Tax Contributions, if any, of each Participant who is among the Highly
Compensated Employees shall be determined by computing the maximum Actual
Deferral Percentage which each such Participant may defer under (a) or (b) of
Section 4.5 and then reducing the Actual Deferral Percentage of some or all of
such Participants through the distribution of such excess Pre-Tax Contributions,
on the basis of the amount of Pre-Tax Contributions of such Participants, as
necessary to reduce the overall Actual Deferral Percentage for eligible
Participants who are among the Highly Compensated Employees to a level which
satisfies either (a) or (b) of Section 4.5, according to the following
procedures:

                  (a) the Pre-Tax Contributions of the Highly Compensated
         Employee or Employees with the highest dollar amount of Pre-Tax
         Contributions shall be reduced to equal the dollar amount of the
         Pre-Tax Contributions of the Highly Compensated Employee or Employees
         with the next highest dollar amount of Pre-Tax Contributions;

                  (b) the reduction amount determined in clause (a) shall be
         distributed to the Highly Compensated Employee or Employees who had the
         highest dollar amount of Pre-Tax Contributions prior to such reduction;
         and

                  (c) the procedures in clauses (a) and (b) shall be repeated
         until the total excess Pre-Tax Contributions are distributed and
         compliance is achieved with (a) or (b) of Section 4.5.

If these distributions are made, the Actual Deferral Percentage is treated as
meeting the nondiscrimination test of Section 401(k)(3) of the Code regardless
of whether the Actual Deferral Percentage, if recalculated after distributions,
would satisfy Section 401(k)(3) of the Code. The above procedures are used for
purposes of recharacterizing excess Pre-Tax Contributions under Section
401(k)(8)(A)(ii) of the Code. For purposes of Section 401(m)(9) of the Code, if
a corrective distribution of excess Pre-Tax Contributions has been made, or a
recharacterization has occurred, the Actual Deferral Percentage for Highly
Compensated Employees is deemed to be the largest amount permitted under Section
401(k)(3) of the Code.

                  The income or loss attributable to the Participant's excess
Pre-Tax Contributions for the Plan Year shall be determined by multiplying the
income or loss attributable to the Participant's Pre-Tax Contribution Account
balance for the Plan Year by a fraction, the numerator of which is the excess
Pre-Tax Contribution and the denominator of which is the Participant's total
Pre-Tax

                                      -27-
<PAGE>   34

Contribution Account balance. Excess Pre-Tax Contributions shall be treated as
Annual Additions under Section 5.5 of the Plan.

         4.9 Contribution Percentage and ESOP Percentage:

         A. Contribution Percentage: The Contribution Percentage for a specified
group of Employees for a Plan Year shall be the average of the ratios
(calculated separately for each Employee in such group) of:

                  (a) the total of the Employer Matching Contributions and the
         After-Tax Contributions (the "Aggregate Contributions") paid under the
         Plan on behalf of each such Employee for such Plan Year; to

                  (b) the Employee's Compensation (as defined in Section
         4.4(b)).

The Plan uses the Contribution Percentage for Participants who are Highly
Compensated Employees for the current year and the Contribution Percentage for
Participants who are non-Highly Compensated Employees (1) for the current Plan
Year, effective January 1, 1997 through December 31, 1998, and (2) for the
preceding Plan Year, effective from and after January 1, 1999, in performing the
non-discrimination testing required under this Section IV. In computing the
Contribution Percentage, the Employer may elect to take into account After-Tax
and Pre-Tax Contributions made under this Plan or any other plan of the Employer
to the extent that the following requirements are satisfied:

                           (i) the amount of non-elective contributions,
                  including those qualified non-elective contributions treated
                  as Employer Matching Contributions for purposes of calculating
                  the Contribution Percentage, satisfies the requirements of
                  Section 401(a)(4) of the Code;

                           (ii) the amount of non-elective contributions,
                  excluding those qualified non-elective contributions treated
                  as Employer Matching Contributions for purposes of calculating
                  the Contribution Percentage and those qualified non-elective
                  contributions treated as elective contributions under Treasury
                  Regulation Section 1.401(k)-1(b)(5) for purposes of
                  calculating the Actual Deferral Percentage, satisfies the
                  requirements of Section 401(a)(4) of the Code;

                           (iii) the elective contributions, including those
                  treated as Employer Matching Contributions for purposes of
                  calculating the Contribution Percentage, satisfy the
                  requirements of Code Section 401(k)(3);

                                      -28-
<PAGE>   35

                           (iv) the qualified non-elective contributions are
                  allocated to the Employee under the Plan as of a date within
                  the Plan Year and the elective contributions satisfy Treasury
                  Regulation Section 1.401(k)-1(b)(i) for the Plan Year; and, if
                  applicable, the Plan and the plans to which the qualified
                  non-elective contributions and elective contributions are
                  made, are or could be aggregated for purposes of Code Section
                  410(b).

A Participant's Contribution Percentage shall be determined after determining
the Participant's Excess Deferrals, if any, pursuant to Section 4.2, and after
determining the Participant's excess Pre-Tax Contributions pursuant to Section
4.8.

                  An eligible Employee for purposes of computing the
Contribution Percentage is defined in Treasury Regulation Section
1.401(m)-1(f)(4). The Contribution Percentage will be zero for an eligible
Employee who received no allocation of Aggregate Contributions.

         B. ESOP Percentage: The ESOP Percentage for a specified group of
Employees for a Plan Year shall be the average of the ratios (calculated
separately for each Employee in such group) of:

                  (a) The total of the ESOP Contributions paid under the Plan on
         behalf of each such Employee for such Plan Year; to

                  (b) The Employee's Compensation (as defined in Section
         4.4(b)).

The Plan uses the ESOP Percentage for Participants who are Highly Compensated
Employees for the current year and the ESOP Percentage for Participants who are
non-Highly Compensated Employees (1) for the current Plan Year, effective
January 1, 1997 through December 31, 1998, and (2) for the preceding Plan Year,
effective from and after January 1, 1999, in performing the non-discrimination
testing required under this Section IV.

                  A Participant's ESOP Percentage shall be determined after
determining the Participant's Excess Deferrals, if any, pursuant to Section 4.2
and after determining the Participant's excess Pre-Tax Contributions pursuant to
Section 4.8.

                  An eligible Employee for purposes of computing the ESOP
Percentage is defined in Treasury Regulation Section 1.401(m)-1(f)(4). The ESOP
Percentage will be zero for an eligible Employee who received no allocation of
Aggregate Contributions.

        4.10 Contribution Percentage and ESOP Percentage Limits: Each of the
Contribution Percentage and ESOP Percentage (with respect to each, the
"Applicable Percentage") for the eligible Employees for any Plan Year who are
Highly Compensated Employees shall not exceed the greater of (a) or (b), as
follows:

                                      -29-
<PAGE>   36

                  (a) the Applicable Percentage for the eligible Employees who
         are not Highly Compensated Employees times 1.25; or

                  (b) the lesser of (i) the Applicable Percentage for the
         eligible Employees who are not Highly Compensated Employees times 2.0
         or (ii) the Applicable Percentage for the eligible Employees who are
         not Highly Compensated Employees plus two percentage points or such
         lesser amount as the Secretary of the Treasury shall prescribe to
         prevent the multiple use of this alternative limitation with respect to
         any Highly Compensated Employee.

                  The Applicable Percentage for any Highly Compensated Employee
for any Plan Year who is eligible to have matching employer contributions made
on his behalf or to make after-tax contributions under one or more plans
described in Section 401(a) of the Code that are maintained by an Employer or an
Affiliate in addition to this Plan shall be determined as if all such
contributions were made to this Plan.

                  In the event that this Plan must be combined with one or more
other plans in order to satisfy the requirements of Code Section 410(b), then
the Applicable Percentage shall be determined as if all such plans were a single
plan. If two or more plans are permissively aggregated for the purposes of Code
Section 410(b) (other than the average benefit percentage test), then the
Applicable Percentage shall be determined as if all such plans were a single
plan.

         4.11 Treatment of Excess Aggregate Contributions or ESOP Contributions:
If neither of the tests described above in Section 4.10 are satisfied with
respect to either Aggregate Contributions or ESOP Contributions, the excess
Aggregate Contributions or ESOP Contributions (as applicable), plus any income
and minus any loss attributable thereto, shall be forfeited or, if not
forfeitable, shall be distributed no later than the last day of the Plan Year
following the Plan Year in which such excess Aggregate Contributions or ESOP
Contributions (as applicable) were made. Such income shall include the allocable
gain or loss for the Plan Year only. The income or loss attributable to the
Participant's excess Aggregate Contributions or ESOP Contributions (as
applicable) for the Plan Year shall be determined by multiplying the income or
loss attributable to the Participant's Account for the Plan Year by a fraction,
the numerator of which is the excess Aggregate Contribution or ESOP
Contributions (as applicable), and the denominator of which is the Participant's
total Account balance. Excess Aggregate Contributions or ESOP Contributions
shall be treated as Annual Additions under Section 5.5 of the Plan.

                  The excess Aggregate Contributions or ESOP Contributions (as
applicable), if any, of each Participant who is among the Highly Compensated
Employees shall be determined by computing the maximum Contribution or ESOP
Percentage under (a) or (b) of Section 4.10 (as applicable) and then reducing
the Contribution or ESOP Percentage of some or all of such Participants whose
Contribution or ESOP Percentage exceeds the maximum through the distribution or
forfeiture of the excess Aggregate Contributions or ESOP Contributions (as
applicable), on the basis of the amount of such excess contributions
attributable to such Participants, as necessary to

                                      -30-
<PAGE>   37

reduce the overall Contribution or ESOP Percentage for eligible Participants who
are among the Highly Compensated Employees to a level which satisfies either (a)
or (b) of Section 4.10, according to the following procedures:

                  (a) the Aggregate Contributions or ESOP Contributions (as
         applicable) of the Highly Compensated Employee or Employees with the
         highest dollar amount of such contributions shall be reduced to equal
         the dollar amount of the Aggregate Contributions or ESOP Contributions
         (as applicable) of the Highly Compensated Employee or Employees with
         the next highest dollar amount of such contributions;

                  (b) the reduction amount determined in clause (a) shall be
         forfeited by or, if not forfeitable, distributed to the Highly
         Compensated Employee or Employees who had the highest dollar amount of
         Aggregate Contributions or ESOP Contributions (as applicable) prior to
         such reduction; and

                  (c) the procedures in clause (a) and (b) shall be repeated
         until the total excess Aggregate Contributions or ESOP Contributions
         (as applicable) are forfeited and/or distributed and compliance is
         achieved with (a) or (b) of Section 4.10.

If these forfeitures and/or distributions are made, the Contribution or ESOP
Percentage is treated as meeting the nondiscrimination test of Section 401(m)(2)
of the Code regardless of whether the Contribution or ESOP Percentage, if
recalculated after such forfeitures and/or distributions would satisfy Section
401(m)(2) of the Code. For purposes of Section 401(m)(9) of the Code, if a
corrective distribution of excess Aggregate Contributions or ESOP Contributions
(as applicable) has been made, the Contribution or ESOP Percentage (as
applicable) for Highly Compensated Employees is deemed to be the largest amount
under Section 401(m)(2) of the Code.

                  For each Participant who is a Highly Compensated Employee, the
amount of excess Aggregate Contributions or ESOP Contributions (as applicable)
is equal to the total Employer Contributions and After-Tax Contributions on
behalf of the Participant (determined prior to the application of this
paragraph) minus the amount determined by multiplying the Participant's actual
contribution ratio (determined after application of this paragraph) by his
Compensation used in determining such ratio. The individual ratios and
Contribution and ESOP Percentages shall be calculated to the nearest 1/100 of 1%
of the Employee's Compensation, as such term is used in paragraph (b) of Section
4.10.

        4.12 Multiple Use of Alternative Limitation: The rules set forth in
Treasury Regulation Section 1.401(m)-2(b) for determination of multiple use of
the alternative methods of compliance with respect to Sections 4.5(b) and
4.10(b) are hereby incorporated into the Plan. If a multiple use of the
alternative limitation occurs with respect to two or more plans or arrangements
maintained by an Employer, it shall be treated as an excess Aggregate
Contribution and must be corrected by reducing the actual contribution ratio of
Highly Compensated Employees eligible both to make elective contributions to
receive matching contributions under the 401(k) arrangement or to make

                                      -31-
<PAGE>   38

contributions under the 401(m) plan. Such reduction shall be by the leveling
process set forth in Section 4.11.

        4.13 ESOP Contributions, Employer Matching Contributions and Pre-Tax
Contributions to be Tax Deductible: ESOP Contributions, Employer Matching
Contributions and Pre-Tax Contributions shall not be made in excess of the
amount deductible under applicable Federal law now or hereafter in effect
limiting the allowable deduction for contributions to profit-sharing plans. The
ESOP Contributions, Employer Matching Contributions and Pre-Tax Contributions to
this Plan when taken together with all other contributions made by the Employer
to other qualified retirement plans shall not exceed the maximum amount
deductible under Section 404 of the Code.

        4.14 Maximum Allocations: Notwithstanding the above, the total Annual
Additions made to the Account of any Participant shall not exceed the limits
prescribed in Section 5.5.

        4.15 Refunds to Employer: Once Contributions are made to the Plan by the
Employer on behalf of the Participants, they are not refundable to the Employer
unless a Contribution:

             (a) was made by mistake of fact; or

             (b) was made conditioned upon the contribution being allowed
         as a deduction and such deduction was disallowed.

Any Contribution made by the Employer during any Plan Year in excess of the
amount deductible or any Contribution attributable to a good faith mistake of
fact shall be refunded to the Employer. The amount which may be returned to the
Employer is the excess of the amount contributed over the amount that would have
been contributed had there not occurred a mistake of fact or the excess of the
amount contributed over the amount deductible, as applicable. A Contribution
made by reason of a mistake of fact may be refunded only within one year
following the date of payment. Any Contribution to be refunded because it was
not deductible under Section 404 of the Code may be refunded only within one
year following the date the deduction was disallowed. Earnings attributable to
any such excess Contribution may not be withdrawn, but losses attributable
thereto must reduce the amount to be returned. In no event may a refund be due
which would cause the Account balance of any Participant to be reduced to less
than the Participant's Account balance would have been had the mistaken amount,
or the amount determined to be non-deductible, not been contributed.

        4.16 Rollover Contributions: Notwithstanding any other provision of the
Plan, the Trustee shall be authorized to accept an "eligible rollover
distribution" within the meaning of Code Section 402(c)(4) on behalf of or from
a person who is (or who will be entitled under Section 3.1 to become) a
Participant in this Plan, provided that the transfer of the assets to this Plan
is one described in Section 402(c)(4), 403(a)(4) or 408(d)(3)(A)(ii) of the
Code. Such a transferred distribution is referred to herein as a "rollover
contribution."

                                      -32-
<PAGE>   39

                  The acceptance of rollover contributions under this Section
4.16 shall be subject to the following conditions:

                  (a) No rollover contribution shall be in an amount less than
         $500.

                  (b) Rollover contributions shall be in cash only.

                  (c) No rollover contribution may be transferred to the Plan
         without the prior approval of the Committee. The Committee shall
         develop such procedures and may require such information from an
         Employee desiring to make such a transfer as it deems necessary or
         desirable. The Committee may act in its sole discretion in determining
         whether to accept the transfer, and shall act in a uniform,
         non-discriminatory manner in this regard.

                  (d) Upon approval by the Committee, a rollover contribution
         shall be paid to the Trustee to be held in the Trust Fund.

                  (e) A separate Rollover Account shall be established and
         maintained for each Employee who has made a rollover contribution. A
         Rollover Account shall share in the earnings and/or losses of the Trust
         Fund (and component Investment Funds in which such account may be
         invested) commencing on the Valuation Date coincident with or next
         following the date on which the transferred amount is placed in the
         Trust Fund. The Employee's interest in his Rollover Account shall be
         fully vested and non-forfeitable. If an Employee who is otherwise
         eligible to participate in the Plan but who has not yet begun
         participation under Section 3.1 of the Plan makes a rollover
         contribution to the Plan, his Rollover Account shall represent his sole
         interest in the Plan until he becomes a Participant.

                  (f) The Committee shall be entitled to rely on the
         representation of the Employee that the rollover contribution is an
         eligible rollover distribution. If, however, it is determined that a
         transfer received from or on behalf of a Employee failed to qualify as
         an eligible rollover distribution within the meaning of Code Section
         402(c)(4), then the balance in the Employee's Rollover Account
         attributable to the ineligible transfer shall, along with any earnings
         thereon, as soon as is administratively practicable, be:

                           (1) segregated from all other Plan assets;

                           (2) treated as a non-qualified trust established by
                  and for the benefit of the Participant; and

                                      -33-
<PAGE>   40

                           (3) distributed to the Employee.

Such an ineligible transfer shall be deemed never to have been a part of the
Plan or Trust.

                                      -34-
<PAGE>   41

                                    ARTICLE V

                             PARTICIPANTS' ACCOUNTS

         5.1 Trust Accounts: The Committee shall create and maintain adequate
records to reflect all transactions of the Trust Fund and to disclose the
interest in the Trust Fund of each Participant (whether on active or inactive
status), former Participant and Beneficiary.

                  (a) Accounts for Participants: Accounts shall be maintained
         for each Participant as may be appropriate from time to time to reflect
         his interest in the ESOP Fund and each Investment Fund in which he may
         be participating at any time as contemplated under Section 8.1. The
         interest in each Investment Fund attributable to the Contributions made
         by or on behalf of each Participant under the Plan and Prior Plans
         shall be reflected in a Pre-Tax Contribution Account and/or an
         After-Tax Contribution Account for each Participant. The interest in
         the Reliant Energy Common Stock Fund of each Participant attributable
         to the Employer Matching Contributions made to the Plan shall be
         reflected in an Employer Matching Account for each Participant. The
         interest in the ESOP Fund of each Participant shall be reflected in an
         ESOP Account for each Participant as described in Section 5.3. An
         Employee or Participant also may have a Rollover Account.

                  The foregoing to the contrary notwithstanding, with respect to
         certain amounts transferred to the Plan as of the Effective Date from
         the Minnegasco and NorAm Plans, the following Prior Plan Accounts shall
         be maintained:

                           (i) Prior Plan Matching Account: The interest in each
                  Investment Fund attributable to employer matching
                  contributions to the Minnegasco and NorAm Plans prior to
                  January 1, 1999 for Minnegasco and NorAm Participants,
                  respectively, shall be reflected in a Prior Plan Matching
                  Account;

                           (ii) Prior Plan ESOP Account: The interest in each
                  Investment Fund attributable to ESOP contributions to the
                  Minnegasco and NorAm Plans prior to January 1, 1999 for
                  Minnegasco and NorAm Participants, respectively, shall be
                  reflected in a Prior Plan ESOP Account;

                           (iii) Cengas Account: The interest in each Investment
                  Fund attributable to the after-tax contributions of certain
                  Minnegasco Participants under the Minnegasco, Inc. Retirement
                  Plan for Employees of the Former Cengas Division shall be
                  reflected in a Cengas Account; and

                                      -35-
<PAGE>   42

                           (iv) Prior Plan 1999 Matching Account: The interest
                  in the Reliant Energy Common Stock Fund attributable to
                  employer matching contributions to the Minnegasco and NorAm
                  Plans for the period commencing on January 1, 1999 and ending
                  on March 31, 1999 for Minnegasco and NorAm Participants,
                  respectively, shall be reflected in a Prior Plan 1999 Matching
                  Account.

                  (b) Stock Suspense Account: There shall also be established
         and maintained under the Trust a suspense account to be known as the
         Stock Suspense Account.

                  (c) Rights in Trust Fund: The maintenance of individual
         Accounts is only for accounting purposes, and a segregation of the
         assets of the Trust Fund to each Account shall not be required.
         Distribution and withdrawals made from an Account shall be charged to
         the Account as of the date paid.

        5.2 Valuation of Trust Fund: A valuation of the Trust Fund shall be made
as of each Valuation Date of each Plan Year. For the purposes of each such
valuation, the assets of each Investment Fund shall be valued at their
respective current market values, and the amount of any obligations for which
the Investment Fund may be liable, as shown on the books of the Trustee, shall
be deducted from the total value of the assets. For the purposes of maintenance
of books of account in respect of properties comprising the Trust Fund, and of
making any such valuation, the Trustee shall account for the transactions of the
Trust Fund on an accrual basis. The current market value shall, for the purposes
hereof, be determined as follows:

                  (a) Where the properties are securities which are listed on a
         securities exchange, or which are actively traded over the counter, the
         value shall be the net asset value, if appropriate, otherwise the last
         recorded sales price. In the event transactions regarding such property
         are recorded over more than one such exchange, the Trustee may select
         the exchange to be used for purposes hereof. Recorded information
         regarding any such securities published in The Wall Street Journal or
         any other publication deemed appropriate may be relied upon by the
         Trustee. If no transactions involving any such securities have been
         recorded as of a particular Valuation Date, then such securities shall
         be valued as provided in paragraph (b) below.

                  (b) Where paragraph (a) hereof shall be inapplicable in the
         valuation of any properties, the Trustee shall obtain from at least two
         qualified persons an opinion as to the value of such properties as of
         the close of business on the particular Valuation Date. The average of
         such estimates shall be used.

                                      -36-
<PAGE>   43

         5.3 Allocation to Accounts:

                  (a) Pre-Tax, After-Tax and Employer Matching Contributions:
         Pre-Tax Contributions and After-Tax Contributions received in the Trust
         Fund since the preceding Valuation Date shall be credited to the
         respective Pre-Tax Contribution Accounts and After-Tax Contribution
         Accounts of the Participants and invested in the Investment Funds in
         accordance with their instructions pursuant to Section 8.1. Employer
         Matching Contributions received in the Trust Fund since the preceding
         Valuation Date shall be allocated to the Participants' Employer
         Matching Accounts in the ratio that the sum of each Participant's
         Pre-Tax Matched Contribution and After-Tax Matched Contribution for the
         period bears to the total Pre-Tax Matched Contributions and After-Tax
         Matched Contributions of all Participants for the period.

                  (b) ESOP Accounts: The ESOP Account of each Participant shall
         be credited with his allocable portion of (i) the Company Stock
         investment in the ESOP Fund purchased and paid for by the Trust (other
         than Financed Stock) or contributed in kind by the Employer, (ii)
         forfeitures from the ESOP Fund, (iii) the Company Stock investment in
         the ESOP Fund released from the Stock Suspense Account and (iv) any
         cash held in the ESOP Fund. Such allocation shall be made in the ratio
         that the sum of each Participant's Pre-Tax Matched Contribution and
         After-Tax Matched Contribution for the period bears to the total
         Pre-Tax Matched Contributions and After-Tax Matched Contributions of
         all Participants for the period. Allocations made pursuant to this
         Section 5.3(b) shall be made as soon as practicable after the close of
         each payroll period in an amount not to exceed 75% of the total of each
         Participant's Pre-Tax Matched Contributions and After-Tax Matched
         Contributions.

                  (c) Stock Suspense Account: The Stock Suspense Account shall
         be credited as of Valuation Date occurring at the end of each payroll
         period with the number of shares of Financed Stock purchased by the
         Trustee since the preceding payroll period Valuation Date. In addition,
         the Stock Suspense Account shall be credited with all ESOP
         Contributions for the Plan Year which are to be used to repay Exempt
         Loans. The Stock Suspense Account shall be debited with amounts used to
         repay Exempt Loans and with the number of shares of Financed Stock that
         are to be released from such Account in accordance with the provisions
         of Section 5.3(b).

                  (d) Allocation Procedures: The Accounts of Participants,
         former Participants and Beneficiaries shall be adjusted in accordance
         with the following:

                           (i) Earnings of the Investment Fund: The earnings (or
                  loss) of the Investment Fund since the preceding Valuation
                  Date (including the appreciation or depreciation in value of
                  the assets of the Investment Fund) shall be allocated to the
                  Accounts of Participants (other than a terminated
                  Participant's Accounts which

                                      -37-
<PAGE>   44

                  have become current obligations of the Investment Fund) in
                  proportion to the balances in such Accounts on the preceding
                  Valuation Date, but after first reducing each such Account
                  balance by any distribution from such Account since the
                  preceding Valuation Date.

                           (ii) Income and Appreciation in Value of Stock
                  Suspense Account and ESOP Accounts in the Trust Fund: The
                  income of the ESOP Fund shall be allocated in proportion to
                  the balances, as of the preceding Valuation Date, in the Stock
                  Suspense Account and the ESOP Accounts, but after first
                  reducing each such Account balance by any distributions or
                  charges from such Accounts since the preceding Valuation Date.
                  Notwithstanding anything to the contrary in the Plan, if and
                  to the extent that dividends credited to Participants' ESOP
                  Accounts are used to amortize an Exempt Loan pursuant to
                  Section 5.6, an interest in the ESOP Fund with a fair market
                  value not less than the amount of such dividends must be
                  allocated to the Participants' ESOP Accounts (resulting from
                  the release of Financed Stock attributable to such use of
                  dividends to amortize the Exempt Loan) for the year of payment
                  of such dividends to the Plan, and the Company shall make such
                  additional Employer Matching Contributions as are necessary to
                  accomplish such result. Any dividends with respect to Financed
                  Stock that are used to amortize an Exempt Loan shall be used
                  first to repay current principal and then to repay current
                  interest with respect to such loan.

                           (iii) Forfeitures: As of each Valuation Date, any
                  amounts in the Employer Matching Accounts which have become
                  forfeitures since the preceding Valuation Date shall first be
                  made available to reinstate previously forfeited Account
                  balances of former Participants, if any, in accordance with
                  Section 6.9 and previous Participants who have unclaimed
                  benefits, if any, in accordance with Section 6.11 and/or to
                  pay incident expenses of the Plan. The remaining forfeitures
                  from the Employer Matching Accounts and all forfeitures from
                  the ESOP Accounts, if any, shall be used to reduce Employer
                  Matching Contributions as specified under Section 4.1.

         5.4 Treatment of Company Stock Purchased with an Exempt Loan:

                  (a) Financed Stock: Any Company Stock purchased by the Trust
         on behalf of the ESOP Fund with the proceeds of an Exempt Loan shall be
         credited initially to the Stock Suspense Account.

                                      -38-
<PAGE>   45

                  (b) Allocation from Stock Suspense Account to ESOP Accounts:
         As of each monthly Valuation Date, and as of any special Valuation Date
         if directed by the Committee, there shall be released an interest in
         the ESOP Fund equal to the excess, if any, of shares of Financed Stock
         determined in (i) over (ii), where (i) and (ii) are as follows: (i) is
         equal to the product of the number of shares of Financed Stock not
         released prior to January 1 of the current Plan Year multiplied by the
         ratio of (y) the amount of principal and interest paid under the Exempt
         Loan during the current Plan Year to (z) the sum of the amount
         determined in clause (y) plus the total of all principal and interest
         to be paid in the future, assuming if the interest rate is variable
         that the interest rate in the future will be the same as that currently
         in effect, and (ii) is equal to the number of shares of Financed Stock
         previously released in the current Plan Year. The Company Stock
         investment in the ESOP Fund released pursuant to the preceding sentence
         shall be allocated to the Participants' ESOP Accounts in accordance
         with the provisions of Section 5.3(b).

                  (c) Payments on Exempt Loans: As of each Valuation Date,
         installment payments, including principal and interest, made by the
         Trustee since the last preceding Valuation Date under Exempt Loans will
         be debited to the Stock Suspense Account and to Participants' ESOP
         Accounts under the provisions of Section 5.3 hereof. Specified income
         shall not include shares of Company Stock attributable to any share
         split or share dividend on outstanding shares.

                  For purposes of determining payments on Exempt Loans, payment
         of principal and interest shall be accounted for substantially in
         accordance with the following: All income ("specified income")
         allocable to the Stock Suspense Account that is attributable to
         collateral for the Exempt Loan or to ESOP Contributions shall be used,
         before any ESOP Contributions are so used, to pay principal amounts due
         under such Exempt Loan; ESOP Contributions shall be first applied to
         repay interest under such Exempt Loan with any excess ESOP Contribution
         used to fund current principal requirements not otherwise funded by the
         specified income; if the specified income exceeds the amount necessary
         to pay principal due on Exempt Loans for the Plan Year, then such
         excess amount shall be first used to pay interest currently due with
         respect to the Exempt Loans and any remaining amount of income may, at
         the direction of the Committee, be used to prepay principal due on
         Exempt Loans in succeeding periods. In the event that there are
         insufficient funds available to make payments of principal or interest
         on Exempt Loans when due, the Committee may direct (i) the Trustee to
         obtain a new Exempt Loan in an amount sufficient to make such payments
         or (ii) the Trustee to sell any Financed Stock which has not yet been
         allocated to ESOP Accounts provided such sale meets the requirements of
         the following sentence. In directing any such sale of Financed Stock,
         the Committee shall consider all of the facts and circumstances
         surrounding the proposed transaction and the reasons therefor and shall
         act in the best interest of Plan Participants in accordance with the
         applicable Treasury Regulations and ERISA.

                                      -39-
<PAGE>   46

        5.5 Maximum Annual Additions: Notwithstanding anything contained herein
to the contrary, the total Annual Additions made to the Account of a Participant
for any Plan Year commencing on or after the Effective Date shall be subject to
the following limitations:

       (a)        Single Defined Contribution Plan

                  1. If an Employer does not maintain any other qualified plan,
         the amount of Annual Additions which may be allocated under this Plan
         on a Participant's behalf for a Limitation Year shall not exceed the
         lesser of the Maximum Permissible Amount or any other limitation
         contained in this Plan.

                  2. Prior to the determination of the Participant's actual
         Compensation for a Limitation Year, the Maximum Permissible Amount may
         be determined on the basis of the Participant's estimated annual
         Compensation for such Limitation Year. Such estimated annual
         Compensation shall be determined on a reasonable basis and shall be
         uniformly determined for all Participants similarly situated. Any
         Employer contributions (including allocation of forfeitures) based on
         estimated annual Compensation shall be reduced by any Excess Amounts
         carried over from prior years.

                  3. As soon as is administratively feasible after the end of
         the Limitation Year, the Maximum Permissible Amount for such Limitation
         Year shall be determined on the basis of the Participant's actual
         Compensation for such Limitation Year.

                  4. If there is an Excess Amount with respect to a Participant
         for the Limitation Year, such Excess Amount shall be disposed of as
         follows:

                           A. There shall first be returned to the Participant
                  his After-Tax Unmatched Contributions as defined in Section
                  4.3, if any, attributable to that Limitation Year, and then
                  his Pre-Tax Unmatched Contributions as defined in Section 4.2,
                  if any, attributable to that Limitation Year to the extent
                  such returned Contributions would reduce the Excess Amount. If
                  any such Excess Amount shall then remain, the Participant's
                  After-Tax Matched Contributions as defined in Section 4.3, if
                  any, attributable to that Limitation Year shall be returned to
                  the Participant, and the Employer Matching Contributions made
                  with respect to said After-Tax Matched Contributions shall be
                  reduced and allocated to a suspense account in the manner set
                  forth in Paragraph B below, both to the extent such returned
                  and reduced Contributions would reduce the Excess Amount. If
                  any such Excess Amount shall then remain, the Participant's
                  Pre-Tax Matched Contributions as defined in Section 4.2, if
                  any, attributable to that

                                      -40-
<PAGE>   47

                  Limitation Year shall be returned to the Participant, and the
                  Employer Matching Contributions made with respect to said
                  Pre-Tax Matched Contributions shall be reduced and allocated
                  to a suspense account in the manner set forth in Paragraph B
                  below, both to the extent such returned and reduced
                  Contributions would reduce the Excess Amount. All such amounts
                  shall be adjusted for any income or loss allocated thereon.

                           B. The amount of the reduction of the Employer
                  Matching Contributions for the Participant shall be
                  reallocated out of the ESOP Account of such Participant and
                  shall be held in a suspense account which shall be applied as
                  a part of (and to reduce to such extent what would otherwise
                  be) the Employer Matching Contributions for all Participants
                  required to be made to the Plan during the next subsequent
                  calendar quarter or quarters. No portion of such Excess Amount
                  may be distributed to Participants or former Participants. If
                  a suspense account is in existence at any time during the
                  Limitation Year pursuant to this Paragraph B, such suspense
                  account shall not participate in the allocation of investment
                  gains or losses of the Trust Fund.

         (b)      Two or More Defined Contribution Plans

                  1. If, in addition to this Plan, the Employer maintains any
         other qualified defined contribution plan, the amount of Annual
         Additions which may be allocated under this Plan on a Participant's
         behalf for a Limitation Year, shall not exceed the lesser of:

                           A. the Maximum Permissible Amount, reduced by the sum
                  of any Annual Additions allocated to the Participant's
                  accounts for the same Limitation Year under such other defined
                  contribution plan or plans; or

                           B. any other limitation contained in this Plan.

                  2. Prior to the determination of the Participant's actual
         Compensation for the Limitation Year, the amount referred to in
         paragraph 1.A. above may be determined on the basis of the
         Participant's estimated annual Compensation for such Limitation Year.
         Such estimated annual Compensation shall be determined on a reasonable
         basis and shall be uniformly determined for all Participants similarly
         situated. Any Employer Contribution (including allocation of
         forfeitures) based on estimated annual Compensation shall be reduced by
         any Excess Amounts carried over from prior years.

                                      -41-
<PAGE>   48

                  3. As soon as is administratively feasible after the end of
         the Limitation Year, the amounts referred to in paragraph 1.A. above
         shall be determined on the basis of the Participant's actual
         Compensation for such Limitation Year.

                  4. If a Participant's Annual Additions under this Plan and all
         such other defined contribution plans result in an Excess Amount, such
         Excess Amount shall be deemed to consist of the amounts last allocated.

                  5. If an Excess Amount was allocated to a Participant on an
         allocation date of this Plan which coincides with an allocation date of
         another plan, the Excess Amount attributed to this Plan will be the
         product of:

                           A. the total Excess Amount allocated as of such date
                  (including any amount which would have been allocated but for
                  the limitations of Section 415 of the Code); times -----

                           B. the ratio of (i) the amount allocated to the
                  Participant as of such date under this Plan divided by (ii)
                  the total amount allocated as of such date under all qualified
                  defined contribution plans (determined without regard to the
                  limitations of Section 415 of the Code).

                  6. Any Excess Amounts attributed to this Plan shall be
         disposed of as provided in paragraph (a) above.

         (c)      Defined Contribution Plan and Defined Benefit Plan

                  1. General Rule

                  If the Employer maintains (or has ever maintained) one or more
defined contribution plans and one or more defined benefit plans, the sum of the
"defined contribution plan fraction" and the "defined benefit plan fraction," as
defined below, cannot exceed 1.0 for any Limitation Year. For purposes of this
paragraph (c) of Section 5.5, employee contributions to a qualified defined
benefit plan are treated as a separate defined contribution plan, and all
defined contribution plans of an Employer are to be treated as one defined
contribution plan, and all defined benefit plans of an Employer are to be
treated as one defined benefit plan, whether or not such plans have been
terminated.

                  2. Reduction

                  If the sum of the defined contribution plan fraction and
defined benefit plan fraction exceeds 1.0, the annual benefit of the defined
benefit plan or plans will be reduced so that the sum of the fractions will not
exceed 1.0. If additional reductions are required for the sum of the fractions

                                      -42-
<PAGE>   49

to equal 1.0, the reductions will then be made first to the Annual Additions of
the defined contribution plans.

                  3. Defined Contribution Fraction

                           A. General Rule: The defined contribution fraction
                  for any year is (i) divided by (ii), where (i) and (ii) are:

                                    (i) the numerator: the sum of the actual
                           Annual Additions to the Participant's account at the
                           close of the Limitation Year; and

                                    (ii) the denominator: the sum of the lesser
                           of the following amounts determined for such year and
                           for each prior year of service of the Employee:

                                            a.       1.25 times the dollar
                                    limitation in effect for each such year
                                    (without regard to the special dollar
                                    limitations for employee stock
                                    ownership plans); or

                                            b.       1.4 times 25% of the
                                    Participant's Compensation for each such
                                    year.

                           B. Special Adjustment to Defined Contribution Plan
                  Fraction: The numerator of the Defined Contribution Plan
                  Fraction of any Participant in the Plan on December 31, 1982
                  shall be reduced by an amount required to decrease the
                  combined fractions of such Participant to 1.0 as of December
                  31, 1982. The amount to be subtracted is the product of (i)
                  the excess of the sum of the fractions over 1.0 and (ii) the
                  denominator of the Defined Contribution Plan Fraction, as
                  computed through the Limitation Year ending December 31, 1982.

                           If the Employee was a Participant as of the end of
                  the first day of the first Limitation Year beginning after
                  December 31, 1986, in one or more defined contribution plans
                  maintained by the Employer which were in existence on May 6,
                  1986, the numerator of this fraction will be adjusted if the
                  sum of this fraction and the defined benefit fraction would
                  otherwise exceed 1.0 under the terms of this Plan. Under the
                  adjustment, an amount equal to the product of (i) the

                                      -43-
<PAGE>   50

                  excess of the sum of the fractions over 1.0 times (ii) the
                  denominator of this fraction, will be permanently subtracted
                  from the numerator of this fraction. The adjustment is
                  calculated using the fractions as they would be computed as of
                  the end of the last Limitation Year beginning before January
                  1, 1987, and disregarding any changes in the terms and
                  conditions of the Plan made after May 5, 1986, but using the
                  Code Section 415 limitation applicable to the first Limitation
                  Year beginning on or after January 1, 1987.

                           The Annual Addition for any Limitation Year beginning
                  before January 1, 1987, shall not be recomputed to treat all
                  employee contributions as Annual Additions.

                  4. Defined Benefit Plan Fraction

                           A. General Rule: The defined benefit plan fraction
                  for any year is (i) divided by (ii), where:

                                    (i) is the projected annual benefit of the
                           Participant under the Plan (determined as of the
                           close of the Limitation Year); and

                                    (ii)    is the lesser of:

                                            a.       1.25 times the dollar
                                    limitation (adjusted, if necessary) for
                                    such year; or

                                            b.       1.4 times 100% of the
                                    Participant's Average Compensation
                                    for the high three years (adjusted, if
                                    necessary).

                           B. Special Rule for Accrued Benefits on December 31,
                  1982: In the case of an individual who before January 1, 1983
                  was a member in the Retirement Plan for Employees of Houston
                  Industries Incorporated whose current accrued benefit under
                  said Plan on December 31, 1982 exceeded the limitation of
                  Section 415(b) of the Code, as amended by the Tax Equity and
                  Fiscal Responsibility Act of 1982, then, for purposes of
                  subsections (b) and (e) of said Section 415 of the Code, the
                  maximum permissible amount under the limitation described in
                  subsection (b) of Section 415 with respect to such individual
                  shall be equal to such current accrued benefit under

                                      -44-
<PAGE>   51

                  said Plan; and for purposes hereof, the term "current accrued
                  benefit" shall be defined as provided in Section 415(b)(2) of
                  the Code.

                           Notwithstanding the above, if the Participant was a
                  participant as of the first day of the first Limitation Year
                  beginning after December 31, 1986, in one or more defined
                  benefit plans maintained by the Employer which were in
                  existence on May 6, 1986, the denominator of this fraction
                  will not be less than 125% of the sum of the annual benefits
                  accrued by the participant under such plans as of the close of
                  the last Limitation Year beginning before January 1, 1987,
                  disregarding any changes in the terms and conditions of the
                  Plan after May 5, 1986. The preceding sentence applies only if
                  the defined benefit plans individually and in the aggregate
                  satisfied the requirements of Code Section 415 for all
                  Limitation Years beginning before January 1, 1987.

                  5. Termination of Section 5.5(c)

                  From and after January 1, 2000, the provisions of this Section
         5.5(c) shall no longer apply.

         (d)      Definitions

                           1. Employer: The Employer that adopts this Plan. In
                  the case of a group of employers which constitutes a
                  controlled group of corporations (as defined in Section 414(b)
                  of the Code as modified by Section 415(h)) or which
                  constitutes trades and businesses (whether or not
                  incorporated) which are under common control (as defined in
                  Section 414(c) as modified by Section 415(h)) or an affiliated
                  service group (as defined in Section 414(m)), all such
                  employers shall be considered a single Employer for purposes
                  of applying the limitations of this Section.

                           2. Annual Additions: With respect to each Plan Year
                  (Limitation Year), the total of the Employer Matching
                  Contributions, ESOP Contributions (except to the extent herein
                  provided), Pre-Tax Contributions, After-Tax Contributions,
                  forfeitures, and amounts described in Sections 415(e)(1) and
                  419(d)(2) of the Code, which are allocated to the
                  Participant's Account; excluding, however, any amounts
                  contributed to reinstate an amount forfeited or an unclaimed
                  benefit. Provided Code Section 415(c)(6) is satisfied, ESOP
                  Contributions used to repay interest on an Exempt Loan as
                  described in Section 5.6 of the Plan shall not constitute an
                  Annual Addition.

                                      -45-
<PAGE>   52

                  Subject to the provisions of Section 415(c)(6) of the Code,
                  Annual Additions shall not include (i) forfeitures of Financed
                  Stock, or (ii) ESOP Contributions used to pay interest on the
                  Exempt Loan and charged against the Participant's Account.

                           3. Excess Amount: The excess of the Participant's
                  Annual Additions for the Limitation Year over the Maximum
                  Permissible Amount.

                           4. Limitation Year: A 12 consecutive month period
                  ending on December 31.

                           5. Maximum Permissible Amount: For a Limitation Year,
                  the Maximum Permissible Amount with respect to any Participant
                  shall be the lesser of:

                                    A. $30,000, as adjusted by the Secretary of
                           the Treasury or his delegate; or

                                    B. 25% of the Participant's Compensation for
                           the Limitation Year.

                           6. Compensation: For purposes of applying the
                  limitations of Code Section 415, Compensation shall include
                  the Participant's wages, salaries, fees for professional
                  service and other amounts received (without regard to whether
                  or not an amount is paid in cash) for personal services
                  actually rendered in the course of employment with an Employer
                  maintaining the Plan to the extent that the amounts are
                  includable in gross income (including, but not limited to,
                  commissions paid to salesmen, compensation for services on the
                  basis of a percentage of profits, commissions on insurance
                  premiums, tips, bonuses, fringe benefits, reimbursements and
                  expense allowances) and shall exclude the following:

                                    A. (i) Contributions made by the Employer to
                           a plan of deferred compensation to the extent that,
                           before the application of the Code Section 415
                           limitations to the Plan, the contributions are not
                           includable in the gross income of the Employee for
                           the taxable year in which contributed, (ii) Employer
                           contributions made on behalf of an Employee to a
                           simplified employee pension plan described in Code
                           Section 408(k) to the extent such contributions are

                                      -46-
<PAGE>   53

                           excludable from the Employee's gross income and
                           (iii) any distributions from a plan of deferred
                           compensation regardless of whether such amounts are
                           includable in the gross income of the Employee when
                           distributed, except any amounts received by an
                           Employee pursuant to an unfunded non-qualified plan
                           to the extent such amounts are includable in the
                           gross income of the Employee;

                                    B. Amounts realized from the exercise of a
                           non-qualified stock option or when restricted stock
                           (or property) held by an Employee either becomes
                           freely transferable or is no longer subject to a
                           substantial risk of forfeiture;

                                    C. Amounts realized from the sale, exchange
                           or other disposition of stock acquired under a
                           qualified stock option; and

                                    D. Other amounts which receive special tax
                           benefits, such as premiums for group life insurance
                           (but only to the extent that the premiums are not
                           includable in the gross income of the Employee), or
                           contributions made by the Employer (whether or not
                           under a salary reduction agreement) towards the
                           purchase of any annuity contract described in Code
                           Section 403(b) (whether or not the contributions are
                           excludable from the gross income of the Employee).

                           For the purposes of this Section, Compensation shall
                  include any and all items which may be included in
                  Compensation under Code Section 415(c)(3)), including (i) any
                  elective deferral (as defined in Code Section 402(g)(3) and
                  (ii) any amount which is contributed or deferred by the
                  Employer at the election of the Employee and which is not
                  includable in the gross income of the Employee by reason of
                  Code Section 125 or 457, but shall exclude amounts that would
                  otherwise be excluded from an Employee's gross income by
                  reason of the application of Code Section 402(h)(1)(B) and, in
                  the case of Employer contributions made pursuant to a salary
                  reduction agreement, Code Section 403(b). The foregoing
                  notwithstanding, Compensation shall be limited to $160,000
                  (unless adjusted in the same manner as permitted under Code
                  Section 415(d)) for each "Limitation Year."

                                      -47-
<PAGE>   54

                           7. Average Compensation: The average compensation
                  during a Participant's high three years of Service, which
                  period is the three consecutive calendar years (or, the actual
                  number of consecutive years of employment for those Employees
                  who are employed for less than three consecutive years with
                  the Employer) during which the Participant had the greatest
                  aggregate compensation from the Employer.

                           8. Annual Benefit: A benefit payable annually in the
                  form of a straight life annuity (with no ancillary benefits)
                  under a plan to which Employees do not contribute and under
                  which no rollover contributions are made.

        5.6 Certain Conditions Applicable to Company Stock: It is the express
purpose of this Plan and the Trust Agreement to invest substantial sums in
Company Stock for the benefit of Participants in the Plan. Pursuant to this
purpose, the Trustee has borrowed funds either through installment purchase
contract, loan agreement or other instrument of indebtedness in order to
purchase Company Stock (with such indebtedness qualifying as an "Exempt Loan"
within the ambit of Section 54.4975-7(b)(1)(iii) of the Treasury Regulations).
Such loans shall continue to be primarily for the benefit of Participants and
their Beneficiaries within the meaning of Treasury Regulation Section
54.4975-7(b)(3). In addition to other provisions of the Plan as may be
applicable from time to time, the provisions of this Section 5.6 shall be
especially applicable to indebtedness which was incurred to purchase Company
Stock and Company Stock purchased with loan proceeds.

                  (a) Use of Proceeds: All proceeds of such an Exempt Loan shall
         continue to be used within a reasonable time after receipt by the
         Trustee only for any or all of the following purposes: to purchase
         Company Stock, to repay obligations incurred under the loan agreement
         or to repay a prior Exempt Loan.

                  (b) Non-Recourse Loans Only: Any loan must continue to be
         without recourse as against the Plan and the Trust Fund.

                  (c) Collateral: The only assets of the Plan and Trust Fund
         that may be given as collateral for a loan are shares of Company Stock
         acquired with the proceeds of the loan and those shares of Company
         Stock that were used as collateral on a prior Exempt Loan repaid with
         the proceeds of the current Exempt Loan; provided, however, that such
         shares of Company Stock shall be proportionately adjusted upon any
         share split, share dividend or combination of outstanding shares of
         such Company Stock.

                                      -48-
<PAGE>   55

                  (d) Creditor's Rights to Assets: No person entitled to payment
         under the loan agreement shall have any right to assets of the Plan or
         Trust Fund other than collateral given for the loan, contributions
         (other than contributions of Company Stock) that are made under the
         Plan to meet the Plan's obligations under the loan and earnings
         attributable to such collateral and the investment of such
         contributions.

                  (e) Transfers upon Default: In the event of default of the
         Exempt Loan, the value of Plan assets transferred in satisfaction of
         the loan must not exceed the amount of default. If the lender is a
         "disqualified person," the loan must continue to provide for a transfer
         of Plan assets upon default only upon and to the extent of failure of
         the Plan to meet the payment schedule of the loan.

                  (f) Interest: The interest rate of any loan described herein
         must not be in excess of a reasonable rate of interest. In determining
         what is a reasonable rate of interest, all relevant factors will be
         considered, including the amount and duration of the loan, the security
         and guarantee (if any) involved, the credit standing of the Plan and
         Trust Fund and the guarantor (if any), and the interest rate prevailing
         for comparable loans. A variable interest rate is permissible if
         determined to be reasonable.

                  (g) Release from Collateral or Suspense: The instrument
         evidencing indebtedness shall continue to provide for release from
         collateral or suspense in accordance with the provisions of Section
         5.4(b) of the Plan.

                  (h) Limitation on Restrictions on Company Stock: No Company
         Stock acquired with the proceeds of a loan described herein may be
         subject to a put, call, or other option, or buy-sell or similar
         arrangement while held by and when distributed from the Plan or its
         related Trust Fund, whether or not the Plan is then an "ESOP" within
         the ambit of Section 54.4975-7(b)(1) of the Treasury Regulations,
         unless specifically required or permitted by such regulations.

                  (i) Limitations on Payments: The payments made during any Plan
         Year, with respect to a loan described herein, may not exceed an amount
         equal to the sum of the ESOP Contributions and any earnings received
         during or previous to the current Plan Year on Company Stock purchased
         with such loan, less payments previously made with respect to such
         loan; provided, however, that payment may in any event be made from the
         proceeds of the sale of any Company Stock which was purchased with the
         loan and which has not yet been allocated to Participants' ESOP
         Accounts in the event of default, or in the event of termination of the
         Trust Fund, to the extent provided in Section 5.3(c) or Section 10.5,
         or under other circumstances determined appropriate by the Committee
         subject to the requirements of the last sentence of the second
         paragraph of Subsection (c) of Section 5.4 of the Plan. The ESOP
         Contributions and earnings described herein must be accounted for
         separately

                                      -49-
<PAGE>   56

         on the books of account of the Plan and Trust until any Exempt Loan is
         repaid, as is provided in the other provisions of Article V of this
         Plan. For purposes of this Section 5.6(i), Company Stock purchased with
         a loan shall reflect proportionate adjustments attributable to any
         share split, share dividend or combination of outstanding shares of
         Company Stock.

                  (j) Certain Rights with Respect to Financed Stock: Any
         Financed Stock, if it is not publicly traded when distributed or is
         subject to a trading limitation when distributed, must be subject to a
         put option. The put option is to be exercisable only by the
         Participant, the Participant's donees, or by a person (including an
         estate or its distributee) to whom the Company Stock passes by reason
         of a Participant's death. The put option must permit the Participant to
         put the Company Stock to the Employer. The put option must be
         exercisable during the 60 consecutive days beginning on the date that
         the Company Stock subject to the put option is distributed by the Plan,
         and for another 60 consecutive days during the Plan Year next following
         the Plan Year in which the shares were distributed. The put option may
         be exercised by the holder notifying the Employer in writing that the
         put option is being exercised. The period during which a put option is
         exercisable does not include any period when a distributee is unable to
         exercise it because the party bound by the put option is prohibited
         from honoring it by applicable Federal or State law. The price at which
         the put option is exercisable is the fair market value of the Company
         Stock on the date of the transaction determined in good faith based on
         all relevant factors. In the discretion of the Committee, either (i)
         payment under a put option will be in cash within 30 days after the put
         option is exercised or (ii) if the payment in respect of a put option
         is to repurchase Company Stock which is distributed as part of a total
         distribution, then the amount to be paid may be paid in substantially
         equal periodic payments not less frequently than annually over a period
         beginning not later than 30 days after the exercise of the put option
         and not exceeding five years provided that there is adequate security
         provided and a reasonable interest paid on unpaid amounts. For purposes
         of the preceding sentence, a total distribution means the distribution
         within one taxable year to the recipient of the balance of the credit
         of the recipient's Account. The provisions described in this
         subparagraph (j) are non-terminable even if the exempt loan is repaid
         or the Plan ceases to be an ESOP.

                  (k) Term of Exempt Loans: Any Exempt Loan made by the Plan or
         Trust Fund for the purpose of purchasing Company Stock must continue to
         be for a specific term and may not be payable on the demand of any
         person, except in the case of default.

                                      -50-
<PAGE>   57

                                   ARTICLE VI

                             PARTICIPANTS' BENEFITS

        6.1 Termination of Service: In the event of a Participant's termination
of service prior to the Effective Date, the vesting provisions of the applicable
Prior Plan as in effect immediately prior to the Effective Date shall govern. In
the event of termination of Service on or after the Effective Date of any
Participant for any reason other than Disability, Retirement or death, a
Participant shall, subject to the further provisions of the Plan, be entitled to
receive (i) 100% of the values in his Pre-Tax Contribution Account, After-Tax
Contribution Account, Rollover Account and, if applicable, Cengas Account (as
defined in Section 5.1(a)), plus (ii) a portion of his Employer Matching
Account, ESOP Account and Prior Plan Accounts (excluding his Cengas Account)
determined by reference to his number of years of Vesting Service and the
following schedule:

<TABLE>
<CAPTION>
                                                        Vesting
             Years of Vesting Service                  Percentage
             ------------------------                  ----------
             <S>                                       <C>
                    Less than 2                             0%
                    2 but less than 3                      25%
                    3 but less than 4                      50%
                    4 but less than 5                      75%
                    5 and more                            100%
</TABLE>

                  If a Participant terminates Service and, at the time of
termination, the present value of the Participant's vested benefit is zero, the
Participant will be deemed to have then received a distribution of such vested
benefit. Any portion of the Employer Matching Account and ESOP Account of a
terminated Participant in excess of the vested portion specified herein shall be
forfeited to the extent provided in Section 6.9. Payment of benefits due under
this Section shall be made in accordance with Section 6.6.

        6.2 Disability of Participants: If a Participant satisfies the
definition of "Disability" under the Company's Long-Term Disability Plan and
commences to receive disability benefits thereunder, such Participant shall be
fully vested in the entire amount of his Account as of the date of the
Disability and shall be entitled to receive such amount in accordance with
Section 6.6. The determination of whether a Participant has become "Disabled"
under the Company's Long-Term Disability Plan by such disability plan's
administrator shall be final and binding on all parties concerned.

        6.3 Death of Participants: In the event of the death of any Participant,
the entire amount in the Account of such Participant shall be fully vested and
after receipt by the Committee of acceptable proof of death shall be payable as
follows:

                                      -51-
<PAGE>   58

                  (a) The Participant's Account shall be distributed to the
         Participant's surviving spouse, but if there is no surviving spouse, or
         if the surviving spouse has previously consented by a qualified
         election pursuant to Section 6.3(b), to the Beneficiary or
         Beneficiaries designated by the Participant in a written designation
         filed with his Employer. If no such designation shall have been so
         filed, or if no designated Beneficiary survives the Participant or can
         be located by the Committee, using reasonable diligence, within six
         months of the Participant's death, then such Participant's Account
         shall be distributed to the duly appointed and serving personal
         representative of the Participant's estate, but only if that personal
         representative can provide the Committee with what the Committee
         reasonably determines is satisfactory documentary proof of that
         appointment and of the personal representative's identity
         (collectively, "Documentary Proof"); if, within six months of the
         Participant's death, there is no duly appointed and serving personal
         representative of the Participant's estate who has provided the
         Committee with Documentary Proof, or if such decedent left no will,
         then such Participant's Account shall be distributed to the
         Participant's heirs at law, determined in accordance with the laws of
         intestate succession of the state in which the Participant was
         domiciled at the time of the Participant's death, provided that such
         heirs provide the Committee with what the Committee reasonably
         determines is satisfactory Documentary Proof of information the
         Committee believes it needs to make the distribution to such heirs. No
         designation of any Beneficiary other than the Participant's surviving
         spouse shall be effective unless in writing and received by the
         Participant's Employer and in no event shall it be effective as of the
         date prior to such receipt. The former spouse of a Participant shall be
         treated as a surviving spouse to the extent provided under a qualified
         domestic relations order as described in Section 414(p) of the Code.

                  (b) The Participant's spouse may waive the right to be the
         Participant's sole Beneficiary and consent to the Beneficiary
         designation made by the Participant. The waiver must be in writing and
         the spouse must acknowledge the effect of the waiver. The spouse's
         waiver must be witnessed by a Plan representative or a notary public.
         The Beneficiary designated by the Participant may not be changed
         without the spouse's consent, unless the consent of the spouse permits
         designation of Beneficiaries by the Participant without any requirement
         of further consent by the spouse. The Participant may file a waiver
         without the spouse's consent if it is established to the satisfaction
         of the Committee that such written consent may not be obtained because
         there is no spouse or the spouse may not be located. Any consent under
         this Section 6.3(b) will be valid only with respect to the spouse who
         signs the consent. Additionally, a revocation of a prior spousal waiver
         may be made by a Participant without the consent of the spouse at any
         time before the distribution of the Account. The number of revocations
         shall not be limited.

                                      -52-
<PAGE>   59

         6.4 Retirement of Participants on or After Retirement Date: A
Participant's interest in the full balance of his Account shall be fully vested
and non-forfeitable upon reaching his Retirement Date. Any Participant who
terminates his Service on or after his Retirement Date shall attain a fully
vested non-forfeitable interest in the entire amount of his Account and shall be
entitled to receive the entire amount of his Account upon the termination of his
Service.

         6.5 In-Service Distributions: Cash dividends paid with respect to
shares of Company Stock in a Participant's ESOP Account may be distributed at
least annually in the discretion of the Committee. Otherwise, except to the
extent that distribution of a Participant's Account is required prior to
termination of his employment under Section 6.10 hereof (in the case of a
Participant whose required beginning date occurs prior to his termination of
employment) or under Section 10.5 hereof relating to termination of the Plan, or
at the election of the Participant under Article VII hereof relating to certain
withdrawals and loans, no distribution or withdrawal of any benefits under the
Plan shall be permitted prior to the Participant's "separation from service,
death or disability" within the meaning of Code Section 401(k) and the
regulations thereunder other than a distribution authorized under the Plan upon
the occurrence of an event described in, and made in accordance with, Code
Section 401(k)(10) or any successor provision of the Code.

         6.6 Payments of Benefits: Upon a Participant's entitlement to payment
of benefits under either Section 6.1, 6.2 or 6.4, he shall file his written
election on such form or forms, and subject to such conditions, as the Committee
shall prescribe. His election shall specify whether he wishes payment of his
benefits to be made as of such entitlement or to be deferred to the extent
provided below. If payments become due for any reason other than death or
Disability, and if the amounts due from the Participant's Accounts are in excess
of $5,000, payment of such amounts shall be deferred to the extent provided
below unless the Participant consents to earlier payment. If the Participant so
consents to an earlier payment, such payment shall be made as soon as
practicable. If the amounts due from the Participant's Accounts do not exceed
$5,000, payment of such amounts shall automatically be made in a lump-sum cash
payment as soon as possible following termination of employment for any reason.

                  In the case of a distribution under Section 6.3 on account of
the Participant's death, the Committee shall pay the entire amount in the
Participant's Accounts to the party or parties entitled thereto under Section
6.3 within five years after the death of such Participant.

                  Unless a Participant elects otherwise, payment of his benefits
under this Plan shall commence no later than as required under Section 6.10.
Subject to Section 6.10, any distribution to be made to a Participant under the
provisions of this Article VI shall be made within one week of the termination
of employment of such Participant, unless such Participant duly elects in
writing for a deferred distribution as provided above. A Participant or his
designated Beneficiaries (but only by his designated Beneficiaries in the event
of the death of a Participant without having made such an election), may elect
that the benefits payable to the Participant and/or Beneficiary be paid in one
of the following methods:

                                      -53-
<PAGE>   60

                  (a) Lump-Sum Distributions: As a lump-sum distribution in
         cash, provided that no lump-sum distribution may be paid to the
         Participant or Beneficiary unless he has elected such distribution on
         an election form prescribed by the Committee.

                  (b) Installment Payments: As monthly, quarterly, semi-annual
         or annual installment payments over a specified term of ten years or
         less, as elected by the Participant or Beneficiary, in cash
         ("Installment Payments"), provided that no Installment Payments may be
         paid to the Participant unless he has elected such payments on an
         election form prescribed by the Committee. After Installment Payments
         commence, the Participant or Beneficiary shall have the right at any
         time to convert the remaining balance of his Account to a lump-sum
         distribution in cash.

                  (c) In-Kind Distributions: As a distribution in kind of the
         shares held for his Account in the Reliant Energy Common Stock Fund and
         the ESOP Fund as described below. If Company Stock acquired with the
         proceeds of an Exempt Loan and available for distribution consists of
         more than one class, a Participant shall receive substantially the same
         proportion of each such class to the extent the distribution is a
         distribution from the ESOP Fund. A Participant may elect to receive any
         percentage, up to 100%, of the vested portion of his Accounts in the
         Reliant Energy Common Stock Fund and the ESOP Fund in whole shares of
         Company Stock as either: (1) a lump-sum distribution in whole shares,
         with any remaining Reliant Energy Common Stock Fund balance and ESOP
         Fund balance and any other Investment Fund balances distributed in cash
         as a lump-sum distribution; or (2) Installment Payments in whole
         shares, with any remaining Reliant Energy Common Stock Fund balance and
         ESOP Fund balance and any other Investment Fund balances distributed in
         cash as Installment Payments. If a Participant elects to receive the
         entire vested portion of his Accounts in the Reliant Energy Common
         Stock Fund and the ESOP Fund in whole shares of Company Stock, such
         Participant shall be entitled to receive a number of whole shares of
         Company Stock, plus the cash value of any partial shares of Company
         Stock, necessary to equal the sum of (i) the value in the Reliant
         Energy Common Stock Fund held in his Pre-Tax Contribution Account
         and/or his After-Tax Contribution Account as of the Valuation Date
         specified in Section 6.8, and (ii) the vested portion of the value in
         the Reliant Energy Common Stock Fund held in his Employer Matching
         Account and the vested portion of the value in the ESOP Fund held in
         his ESOP Account as of such Valuation Date. If a Participant elects to
         receive a percentage which is less than 100% of the vested portion of
         his Accounts in the Reliant Energy Common Stock Fund and the ESOP Fund
         in whole shares of Company Stock, then the result obtained from the
         preceding formula shall be multiplied by such percentage to obtain the
         number of whole shares of Company Stock and cash for partial shares of
         Company Stock to be distributed to such Participant. The foregoing not
         withstanding, an in-kind distribution may not be

                                      -54-
<PAGE>   61

         paid to the Participant unless he has elected such distribution on an
         election form prescribed by the Committee.

                  (d) Joint and Survivor Annuity: As a joint and survivor
         annuity solely with respect to the amounts in the Prior Plan Accounts
         that represent the Cengas Account of a Minnegasco Participant who, at
         time of distribution under this Section 6.6, is married or dies before
         such distribution commences and his spouse survives him until the time
         such distributions commence. Unless the Participant elects one of the
         distribution options set forth above in (a) through (c) of this Section
         6.6 ("optional forms of benefits"), pursuant to an election form
         prescribed by the Committee, the Participant's benefit provided by
         assets attributable to his Cengas Account shall be applied to the
         purchase of a qualified joint and survivor annuity or, if the
         Participant's death occurs on or before the date payments are to
         commence, a qualified survivor annuity. The Committee shall direct the
         Trustee to purchase an annuity contract based on considerations the
         Committee in its sole discretion deems appropriate. Once an annuity has
         been purchased, all benefits due to those assets shall be determined
         pursuant to the terms of the annuity. In the case of a qualified joint
         and survivor annuity, the applicable election period is the 90-day
         period ending on the date Plan distributions commence.

                  Unless the Participant establishes to the satisfaction of the
         Committee that he has no spouse or his spouse cannot be located, any
         election in favor of an optional form of benefit must be consented to
         by the Participant's spouse, with such consent witnessed by a notary
         public, in order to be valid. The consent will be valid only for the
         spouse who signs the consent, or in the event of a deemed election, the
         designated spouse. A Participant may revoke without limit any prior
         elections of an optional form of payment without the consent of the
         spouse at any time before the commencement of benefits. If revoked, an
         optional form cannot be subsequently elected without the spouse's
         consent as provided above. A Participant may not modify any election
         consented to by a spouse without the spouse's consent as provided
         above. A spouse's consent may not be revoked without the written
         consent of the Participant.

                  In case of a qualified joint and survivor annuity, within a
         reasonable period prior to the commencement of benefits the Committee
         shall provide each Participant with a written explanation of (i) the
         terms and conditions of the qualified joint and survivor annuity; (ii)
         the Participant's right to make the effect of an election to waive the
         qualified joint and survivor annuity; (iii) the rights of a
         Participant's spouse; and (iv) the right to make and the effect of a
         revocation of a previous election to waive the qualified joint and
         survivor annuity.

                  All amounts attributable to (i) any excess of the values
attributable to the interest in his Pre-Tax Contribution Account and/or his
After-Tax Contribution Account, and the vested portion

                                      -55-
<PAGE>   62

of his interest in his Employer Matching Account, ESOP Account and Prior Plan
Accounts that are invested in the Reliant Common Stock Fund and the ESOP Fund,
over the interest therein provided to be distributed to him in kind, plus (ii)
any interest of such Participant in his Pre-Tax Contribution Account and/or his
After-Tax Contribution Account in any other Investment Fund, with the exception
of the Reliant Common Stock Fund shall be distributed in cash.

         6.7 Payment of Distribution Directly to Eligible Retirement Plan:

                  (a) Notwithstanding any provision of the Plan to the contrary
         that would otherwise limit a Distributee's election under this Section
         6.7, a Distributee may elect, at the time and in the manner prescribed
         by the Committee, to have any portion of an Eligible Rollover
         Distribution paid directly to an Eligible Retirement Plan specified by
         the Distributee in a Direct Rollover.

                  (b) The terms used in Section 6.7(a) above shall have the
         following meanings:

                           (i) Eligible Rollover Distribution: An Eligible
                  Rollover Distribution is any distribution of all or any
                  portion of the balance to the credit of the Distributee,
                  except that an Eligible Rollover Distribution does not
                  include: any distribution that is one of a series of
                  substantially equal periodic payments (not less frequently
                  than annually) made for the life (or life expectancy) of the
                  Distributee or the joint lives (or joint life expectancies) of
                  the Distributee and the Distributee's designated Beneficiary,
                  or for a specified period of ten years or more; any
                  distribution to the extent that such distribution is required
                  under Section 401(a)(9) of the Code; and the portion of any
                  distribution that is not includable in gross income
                  (determined without regard to the exclusion for net unrealized
                  appreciation with respect to employer securities).

                           (ii) Eligible Retirement Plan: An Eligible Retirement
                  Plan is an individual retirement account described in Section
                  408(a) of the Code, an individual retirement annuity described
                  in Section 408(b) of the Code, an annuity plan described in
                  Section 403(a) of the Code, or a qualified trust described in
                  Section 401(a) of the Code, that accepts the Distributee's
                  Eligible Rollover Distribution. However, in the case of an
                  Eligible Rollover Distribution to the surviving spouse, an
                  Eligible Retirement Plan is an individual retirement account
                  or individual retirement annuity.

                           (iii) Distributee: A Distributee includes an Employee
                  or former Employee. In addition, the Employee's or former
                  Employee's

                                      -56-
<PAGE>   63

                  surviving spouse and the Employee's or former Employee's
                  spouse or former spouse who is the alternate payee under a
                  qualified domestic relations order, as defined in Section
                  414(p) of the Code, are Distributees with regard to the
                  interest of the spouse or former spouse.

                           (iv) Direct Rollover: A Direct Rollover is a payment
                  by the Plan to an Eligible Retirement Plan specified by the
                  Distributee.

                  (c) In the event that a Distributee, after receiving the
         explanation required by Section 402(f) of the Code, does not
         affirmatively elect a Direct Rollover under Section 6.7(a) above, the
         Distributee shall be deemed to have elected not to have any portion of
         the Eligible Rollover Distribution paid directly to an Eligible
         Retirement Plan.

                  (d) Notwithstanding any provisions of this Section to the
         contrary, a Distributee may not elect a Direct Rollover with respect to
         Eligible Rollover Distributions under this Plan which are reasonably
         expected to total less than $200 during any calendar year.

        6.8 Participation Rights Determined as of Valuation Date Coinciding with
or Preceding Termination of Employment: In the case of any Participant whose
employment shall be terminated for any reason, no further credits or charges
arising from any source shall be made to the Accounts of any such terminating
Participant after the credits or charges made as of the Valuation Date
coinciding with or immediately preceding his termination of employment, except
for:

                  (a) Pre-Tax Contributions, After-Tax Contributions and
         Employer Matching Contributions and ESOP Contributions made subsequent
         to such Valuation Date;

                  (b) Withdrawals or distributions made subsequent to such
         Valuation Date; or

                  (c) In the case of a delayed distribution pursuant to a
         Participant's election as provided in Section 6.6, such subsequent
         adjustments to the values in the Accounts of such Participant up to the
         Valuation Date coinciding with or preceding the receipt of the
         Participant's election for distribution.

        6.9 Treatment of Non-Vested Account Balances Upon Termination of
Service: This Section 6.9 does not apply to Participants who are fully vested at
the time of termination of Service.

                  If a Participant receives an actual or deemed distribution
pursuant to Section 6.1 prior to the close of the second Plan Year following the
Plan Year in which the Participant's Service

                                      -57-
<PAGE>   64

terminates, the non-vested portion of his Employer Matching Account, ESOP
Account and Prior Plan Accounts shall be forfeited and shall become available
for allocation as provided in Section 5.3(d)(iii). If a Participant who has
received an actual distribution as described in this paragraph thereafter
resumes Service under the Plan at any time, he shall be entitled to have the
forfeited amounts reinstated to such Accounts upon his recommencement of
participation in the Plan. If a Participant who has received a deemed
distribution as described in this paragraph thereafter resumes Service under the
Plan before incurring five consecutive one-year Breaks in Service, he shall be
entitled to have the forfeited amounts reinstated to such Accounts upon his
recommencement of participation in the Plan.

                  If a Participant does not receive a distribution of his vested
benefit by the close of the second Plan Year following the Plan Year in which
his Service terminates, but receives such a distribution before incurring five
consecutive one-year Breaks in Service, the non-vested balance in the
Participant's Employer Matching Account, ESOP Account and Prior Plan Accounts
shall be credited to a separate account at the time of distribution of the
vested benefit. If such a Participant is thereafter reemployed prior to
incurring five consecutive one-year Breaks in Service, the Participant's vested
interest in the separate account, including any gains or losses thereon, at any
subsequent relevant time shall be an amount "X" determined by the following
formula: X = P(AB + D) - D. For purposes of applying this formula: P is the
vested percentage at such relevant time; AB is the account balance at the
relevant time; D is the amount of the prior distribution to the Participant. If
the Participant is not reemployed before he has incurred five consecutive
one-year Breaks in Service, his separate account shall then be forfeited and
shall become available for allocation as described in Section 5.3(d)(iii).

                  If a Participant does not receive a distribution of his vested
benefit before incurring five consecutive one-year Breaks in Service, the
non-vested balance in the Participant's Employer Matching Account, ESOP Account
and Prior Plan Accounts shall then be forfeited and shall become available for
allocation as described in Section 5.3(d)(iii).

                  If more than one class of Company Stock acquired with an
Exempt Loan has been allocated to a Participant's ESOP Account and any amounts
are forfeited from such Account pursuant to this Section, the same proportion
shall be forfeited from each class.

        6.10 Required Minimum Distributions: Notwithstanding any provision of
this Plan to the contrary, prior to January 1, 1999, for a Participant attaining
age 70 1/2 prior to January 1, 1999, any benefits to which a Participant is
entitled shall commence not later than the April 1 following the calendar year
in which the Participant attains age 70 1/2, whether or not such Participant's
employment had terminated in such year. Effective January 1, 1999, for a
Participant attaining age 70 1/2 after December 31, 1998, any benefits to which
a Participant is entitled shall commence not later than the April 1 following
the later of (i) the calendar year in which the Participant attains age 70 1/2
or (ii) the calendar year in which the Participant's employment terminates
(provided, however, that clause (ii) of this sentence shall not apply in the
case of a Participant who is a "5% owner" (as defined in Section 416 of the
Code) with respect to the Plan Year ending in the calendar year in

                                      -58-
<PAGE>   65

which such Participant attains age 70 1/2). If a Participant is receiving
distributions from his Account on January 1, 1999 pursuant to this Section 6.10
as in effect prior to January 1, 1999, but would not be required to receive
distributions under this Section 6.10 as in effect on January 1, 1999, then the
Participant may elect to cease distributions from his Account until the April 1
following the end of the calendar year in which such Participant terminates
employment. Distributions under this Section 6.10 shall be at least equal to the
required minimum distributions under Section 401(a)(9) of the Code; provided,
however, that any installment distributions pursuant to this Section 6.10 for
Participants who have not terminated employment shall be made over a period not
to exceed ten (10) years.

        6.11 Unclaimed Benefits: If at, after or during the time when a benefit
hereunder is payable to any Participant, Beneficiary or other distributee, the
Committee, upon request of the Trustee, or at its own instance, shall mail by
registered or certified mail to such distributee, at his last known address, a
written demand for his present address or for satisfactory evidence of his
continued life, or both, and if such distributee shall fail to furnish the same
to the Committee within two years from mailing of such demand, then the
Committee may, in its sole discretion, determine that such Participant,
Beneficiary or other distributee has forfeited his right to such benefit and may
declare such benefit, or any unpaid portion thereof, terminated, as if the death
of the distributee (with no surviving Beneficiary) had occurred on the later of
the date of the last payment made thereon, or the date such Participant,
Beneficiary or other distributee first became entitled to receive benefit
payments. Any such forfeited benefit shall be applied as a part of (and to
reduce to such extent) the Employer Contributions required to be made next
following the date such forfeiture is declared to be forfeited by the Committee.
Notwithstanding the provisions of this Section 6.11, any such forfeited benefit
shall be reinstated if a claim for the same is made by the Participant,
Beneficiary or other distributee at any time thereafter. The reinstatement shall
be made by a mandatory contribution by the Company, allocated solely to such
reinstatement.

        6.12 Optional Forms of Benefits: Notwithstanding anything in the Plan to
the contrary, all optional forms of benefits which are "Section 411(d)(6)
protected benefits," as described in Treasury Regulations Section 1.411(d)-4,
shall continue to be optional forms of benefits for Participants to whom the
optional forms apply, notwithstanding any subsequent amendment of the Plan
purporting to revise or delete any such optional form of benefit and
notwithstanding any contrary provision of this Article VI or Article VII, unless
otherwise permitted by applicable law.

                                      -59-
<PAGE>   66

                                   ARTICLE VII

                              WITHDRAWALS AND LOANS

        7.1 Withdrawal of After-Tax Contributions: Pursuant to advance notice
given in the manner prescribed by the Committee from time to time and subject to
the conditions of Section 7.4, each Participant may elect to withdraw all or any
amounts attributable to his After-Tax Matched and Unmatched Contributions,
determined as of the Valuation Date immediately preceding the withdrawal date;
provided, however, that, to the extent applicable, a Participant must first
withdraw all amounts in his Cengas Account in accordance with Section 7.3 and
subject to written consent of his spouse in a manner prescribed by the
Committee. No amount withdrawn under this Section 7.1 shall be charged to the
After-Tax Matched Contributions of a Participant until the withdrawable amounts
attributable to the Participant's After-Tax Unmatched Contributions have been
withdrawn.

        7.2 Withdrawal of After-Tax and Pre-Tax Contributions On and After Age
59 1/2: Pursuant to advance notice given in the manner prescribed by the
Committee from time to time and subject to the conditions of Section 7.4, in
addition to withdrawals that may be available under Section 7.1 and Section 7.3,
each Participant who is age 59 1/2 or older may elect to withdraw all or any
amounts attributable to his After-Tax Matched and Unmatched Contributions, the
vested portion of his Prior Plan Accounts, his Rollover Account and his Pre-Tax
Matched and Unmatched Contributions, determined as of the Valuation Date
immediately preceding the withdrawal date. Amounts withdrawn under this Section
7.2 shall be charged and withdrawn from a Participant's Accounts, to the extent
applicable, in the following order: (i) Cengas Account; (ii) After-Tax Unmatched
Contributions and then After-Tax Matched Contributions in his After-Tax
Contribution Account; (iii) vested portion of his Prior Plan Matching Account;
(iv) vested portion of his Prior Plan 1999 Matching Account; (v) vested portion
of his Prior Plan ESOP Account; (vi) Rollover Account; and (vii) Pre-Tax
Unmatched Contributions and then Pre-Tax Matched Contributions in his Pre-Tax
Contribution Account. The foregoing notwithstanding, any withdrawal from a
Participant's Cengas Account shall be subject to written consent of his spouse
in a manner prescribed by the Committee.

        7.3 Withdrawal from Prior Plan Accounts and Rollover Account: Pursuant
to advanced notice given in a manner prescribed by the Committee from time to
time and subject to the conditions of Section 7.4, in addition to withdrawals
available under Section 7.1 and Section 7.2, a Participant, to the extent
applicable, may elect to withdraw all or any vested amounts in his Prior Plan
Accounts and his Rollover Account, determined as of the Valuation Date
immediately preceding the withdrawal date. Amounts withdrawn under this Section
7.3 shall be charged and withdrawn from a Participant's Accounts, to the extent
applicable, in the following order: (i) Cengas Account; (ii) vested portion of
his Prior Plan Matching Account; (iii) vested portion of his Prior Plan 1999
Matching Account; (iv) vested portion of his Prior Plan ESOP Account; and (v)
Rollover Account.

                                      -60-
<PAGE>   67

         Moreover, a Minnegasco Participant (1) whose Service terminates prior
to January 1, 2000 and (2) who as of such termination date is fully vested
(100%) in his Accounts and is age 55 or older (a "Minnegasco Retiree") may elect
to withdraw all or any amounts in his After-Tax Contributions Account, Pre-Tax
Contributions Account, Prior Plan Accounts and Rollover Account, determined as
of the Valuation Date immediately preceding the withdrawal date ("Minnegasco
Retiree Withdrawal"). Amounts withdrawn with respect to a Minnegasco Retiree
Withdrawal under this Section 7.3 shall be charged and withdrawn from a
Minnegasco Retiree's Accounts, to the extent applicable, in the following order:
(i) Cengas Account; (ii) After-Tax Contributions Account; (iii) Prior Plan
Matching Account; (iv) Prior Plan 1999 Matching Account; (v) Prior Plan ESOP
Account; (vi) Rollover Account; and (vii) Pre-Tax Contribution Account. The
foregoing notwithstanding, any withdrawal from a Minnegasco Retiree's Cengas
Account shall be subject to written consent of his spouse in a manner prescribed
by the Committee.

        7.4 Conditions of Withdrawals: Each Participant who is under the age of
59 1/2 and who has less than five years of Service at the time he elects to
withdraw all or a portion of his After-Tax Matched Contributions shall be
suspended from participation in the Plan from the Valuation Date preceding the
distribution of the withdrawal until the date following six full months from the
date of such withdrawal provided the Committee or its agent has received prior
to such date the Participant's election (in the form and manner prescribed in
Section 3.4 hereof) to commence participation after such suspension. Moreover,
no withdrawal shall be permitted from the Prior Plan Matching Account or Prior
Plan 1999 Matching Account of a NorAm or Minnegasco Participant who is under the
age of 59 1/2 unless and until he is fully vested (100%) in such Accounts as of
the withdrawal date. Subject to the conditions under this Section 7.4 and under
Section 7.1, Section 7.2 and Section 7.3, as applicable, there shall be no limit
on the number of withdrawals a Participant may make from his Pre- Tax
Contribution Account, After-Tax Contribution Account, Prior Plan Accounts and
Rollover Account within any 12-month period; provided, however, that (i) a
Minnegasco Retiree shall not be permitted to make a Minnegasco Retiree
Withdrawal (as defined in Section 7.3) during the six-month period following the
date of his immediately preceding Minnegasco Retiree Withdrawal and (ii) the
minimum amount that a Participant or Minnegasco Retiree is permitted to withdraw
shall be the lesser of $500 or the entire balance of such Accounts. Except as
provided in Section 7.5 and under Article VI, no withdrawals shall be permitted
from a Participant's Employer Matching Account or ESOP Account. Notwithstanding
any provision in this Article VII to the contrary, to the extent any amounts
attributable to a Participant's Account or Accounts collateralizes a loan under
Section 7.5, such collateralized amounts shall not be eligible for withdrawal
under this Article VII.

        7.5 Loans: Any Participant who is an Employee (including any such
Participant on an Authorized Absence) may make application to borrow from his
vested Accounts in the Trust Fund. In addition to Participants who are Employees
(including any such Participant on an Authorized Absence), loans shall be
available to any former Participant or any Beneficiary or "alternate payee" with
respect to a former Participant, but, if and only if, such person is a "party in
interest" with respect to the Plan within the meaning of ERISA Section 3(14) and
who must be eligible to obtain a Plan loan in order for exemptions set forth in
Department of Labor Regulation

                                      -61-
<PAGE>   68
Section 2550.408b-1 to apply to the Plan (herein, together with Participants who
are Employees and those on Authorized Absence, collectively referred to as
"Borrower"). Upon receipt of a loan application from a Borrower, the Committee
may in its discretion direct the Trustee to make a loan to such Borrower. Such
loans shall be granted in a uniform and non-discriminatory manner pursuant to
the terms and conditions of a written loan procedure that shall be established
by the Committee and subject to amendment from time to time and at any time by
the Committee, with such written procedure hereby incorporated by reference as a
part of the Plan. The amount of the loan when added to the amount of any
outstanding loan or loans to the Borrower from any other plan of the Employer or
an Affiliate which is qualified under Code Section 401(a) shall not exceed the
lesser of (i) $50,000, reduced by the excess, if any, of the highest outstanding
balance of loans from all such plans during the one-year period ending on the
day before the date on which such loan was made over the outstanding balance of
loans from the Plan on the date on which such loan was made or (ii) 50% of the
present value of Borrower's vested Account balances under the Plan.

                                      -62-
<PAGE>   69

                                  ARTICLE VIII

                              INVESTMENT DIRECTIONS

        8.1 Investment of Trust Fund: Except as provided in Article VII with
respect to Plan loans and as provided below with respect to the Employer
Matching Account, ESOP Fund, ESOP Account and Prior Plan 1999 Matching Account,
the Trustee shall divide the Trust Fund into Investment Funds, as set forth in
Attachment A hereto, with such attachment hereby incorporated by reference as a
part of the Plan, in accordance with the directions of the Participant and
following such rules and procedures prescribed by the Committee. Notwithstanding
any provision in this Section 8.1 to the contrary, a Participant may not direct
the investment of the amounts in his Employer Matching Account, ESOP Account or
Prior Plan 1999 Matching Account into any Investment Fund other than the Reliant
Energy Common Stock Fund, as described in Attachment A hereto, except as
provided in Section 8.2.

        The Committee from time to time may revise the number and type of
Investment Funds provided in Attachment A. Subject to such rules and procedures
adopted by the Committee, each Participant shall have the right to direct the
Committee or any agent appointed by the Committee to administer the investment
of the Trust Fund to instruct the Trustee to invest his Pre-Tax Contributions,
After-Tax Contributions, and amounts in his Prior Plan Accounts, excluding the
Prior Plan 1999 Matching Account, and Rollover Account, and the earnings and
accretions thereon, in any whole percentages totaling 100% among the Investment
Funds.

        With no restrictions on frequency, each Participant may by electronic,
telephonic, written or other such manner as may be prescribed from time to time
by the Committee and subject to any restrictions or conditions which may be
established by the Committee, direct the investment of his future After-Tax and
Pre-Tax Contributions or the transfer of the current values in his After-Tax
Contribution Account, Pre-Tax Contribution Account, Prior Plan Accounts,
excluding the Prior Plan 1999 Matching Account, and/or Rollover Account among
the various Investment Funds in any whole percentages totaling 100%. Any such
change in Investment Funds shall be effective as soon as reasonably practicable
following receipt of the change of Investment Funds, but in no event shall such
change be effective earlier than the close of business on the Valuation Date on
which such change is received. If a Participant fails to make a proper
designation, then his Account shall be invested as soon as administratively
feasible in the Investment Fund or Funds specified by the Committee from time to
time in a uniform and non-discriminatory manner.

        Except as otherwise expressly provided herein, interest, dividends and
other income and all profits and gains produced by each Investment Fund shall be
paid in such Investment Fund, and such interest, dividends and other income, and
profits or gains without distinction between principal and income, shall be
invested and reinvested, but only in property of the class hereinabove specified
for the particular Investment Fund. However, the Committee may direct that
dividends paid with respect to shares in the ESOP Fund be distributed on an
annual basis or more frequently in order that the deduction under Code Section
404(k) be available to the Company, in which event

                                      -63-
<PAGE>   70
income that constitutes dividends on shares of Company Stock in the ESOP Fund
shall not be invested in Company Stock but shall be temporarily invested in cash
equivalents until distribution to Participants. In making payments in respect of
Exempt Loans, the Trustee shall utilize income and ESOP Contributions as is
specified in Section 5.3 hereof; namely, that income shall be first used to fund
principal payments and ESOP Contributions shall be first used to fund interest
payments. All purchases of Company Stock shall be made at prices which, in the
judgment of the Trustee, do not exceed the fair market value of such Company
Stock. Pending such investment or application of cash, the Trustee may retain
cash uninvested without liability for interest if it is prudent to do so, or may
invest all or any part thereof in Treasury Bills, commercial paper, or like
holdings.

                  It is hereby explicitly provided and expressly acknowledged
that up to 100% of the assets of the Plan held in the Trust Fund may be invested
in Common Stock, as contemplated by the exception provided in Section 407(b) of
ERISA.

         8.2 Diversification Election:

                  (a) Subject to Section 8.2(b), each qualified Participant (as
         defined herein) may elect within 90 days after the close of each Plan
         Year in the initial election period (as defined herein), to direct the
         investment of up to 25% of the sum of the balances in the Participant's
         Employer Matching Account, ESOP Account, and Prior Plan 1999 Matching
         Account (to the extent such portion exceeds the amount to which a prior
         election to diversify under this Section 8.2(a) applies) into any or
         all Investment Funds with the exception of the Reliant Energy Common
         Stock Fund, and such diversification shall be made no later than as
         required under Code Section 401(a)(28). In the Plan Year after the
         initial election period, the percentage shall be 50% instead of 25%. A
         qualified Participant is any Participant who has completed at least ten
         years of participation in the Plan and applicable Prior Plan and who
         has attained age 55. The initial election period means the five Plan
         Year period beginning with the first Plan Year on or after January 1,
         1992 in which the Participant first became a qualified Participant.

                  (b) If implemented by the Committee, effective as of the date
         specified by the Committee, this Section 8.2(b) shall replace,
         supersede and apply in lieu of Section 8.2(a), as follows:

                           (i) Each Participant who has (1) completed at least
                  ten years of participation in the Plan and applicable Prior
                  Plan and (2) attained age 55 (hereinafter, a "Qualified
                  Participant") may elect within 90 days after the close of each
                  Plan Year in the initial election period (as defined herein),
                  to direct the investment of up to 25% of the sum of the
                  balances in such Participant's Employer Matching Account, ESOP
                  Account, and Prior Plan 1999 Matching Account (to the extent
                  such portion exceeds the amount to which a prior election

                                      -64-
<PAGE>   71

                  to diversify under this Section 8.2(a) applies) into any or
                  all Investment Funds with the exception of the Reliant Energy
                  Common Stock Fund, and such diversification shall be made no
                  later than as required under Code Section 401(a)(28). In the
                  Plan Year after the initial election period, the percentage
                  shall be 50% instead of 25%. The initial election period means
                  the five Plan Year period beginning with the first Plan Year
                  in which the Participant first became a Qualified Participant.

                           (ii) Each Participant may elect, once each calendar
                  year in the manner and subject to such rules, procedures and
                  overriding Plan limits as specified by the Committee, to
                  direct the investment of up to 50% of the balance in the
                  Participant's ESOP Account which are attributable to Employer
                  Contributions made to such account on or after the effective
                  date of the implementation of this Section 8.2(b) into any or
                  all Investment Funds with the exception of the Reliant Energy
                  Common Stock Fund; provided, however, that at least 50% of the
                  aggregate sum of the balances in the ESOP Accounts of all
                  Participants must be invested in Company Stock. Such election
                  shall be effective as soon as reasonably practicable following
                  receipt of the election to diversify, but in no event shall
                  the election be effective earlier than the close of business
                  on the Valuation Date on which the election is received. Any
                  amounts so diversified and reinvested may subsequently be
                  directed by the Participant in the same manner as amounts in
                  the Participant's After-Tax and Pre-Tax Contribution Accounts
                  as described in Section 8.1, except that none of the amounts
                  so diversified may be invested in the Reliant Energy Common
                  Stock Fund.

         8.3 Voting of Company Stock; Exercise of Other Rights:

                  (a) Voting rights with respect to shares of Company Stock in
         the ESOP Fund allocated to the ESOP Accounts of Participants and shares
         in the Reliant Energy Common Stock Fund allocated to the Accounts of
         Participants shall be voted by the Trustee in such manner as may be
         directed by the respective Participants, with fractional shares being
         voted on a combined basis to the extent possible to reflect the
         direction of the voting Participants. The Trustee shall vote both
         allocated shares of Company Stock for which they have not received
         direction, as well as shares of Company Stock held in the Stock
         Suspense Account, in the same proportion as directed shares are voted,
         giving effect to all affirmative directions by Participants, including
         directions to vote for or against, to abstain or to withhold the vote,
         and the Trustee shall have no discretion in such matter.

                                      -65-
<PAGE>   72

                  (b) In the event that there is a tender offer or exchange
         offer for outstanding shares of Company Stock, rights with respect to
         the tender offer or exchange offer shall be as with respect to voting
         rights described in Section 8.3(a) above. If the Trustee shall not
         receive timely instruction from a Participant as to the manner in which
         to respond to such a tender offer, the Trustee shall not tender or
         exchange any shares of Company Stock with respect to which such
         Participant has the right to direction, and the Trustee shall have no
         discretion in such matter. With respect to shares of Company Stock held
         in the Stock Suspense Account and fractional shares of Company Stock
         allocated to Participants' ESOP Accounts and Employer Matching
         Accounts, voting rights and rights to tender or exchange in connection
         with a tender offer or exchange offer for the shares of Company Stock
         shall be exercised by the Trustee in the same proportion as they vote,
         tender or exchange shares of Company Stock with respect to shares
         allocated to the Participants' ESOP Accounts and Employer Matching
         Accounts, and the Trustee shall have no discretion in such matter.

                  (c) Solicitation of exercise of Participants' voting rights by
         management of the Company and others under a proxy or consent provision
         applicable to all holders of Company Stock shall be permitted.
         Solicitation of exercise of Participant tender or exchange offer rights
         by management of the Company and others shall be permitted. The Trustee
         shall notify Participants of each occasion for the exercise of voting
         rights or rights with respect to a tender offer or exchange offer
         within a reasonable time before such rights are to be exercised. Such
         notification shall include all information distributed to shareholders
         by the Company regarding the exercise of such rights. Copies of Company
         written communications to Participants relating to each opportunity for
         Participant exercise of rights under this Section 8.3 shall be promptly
         furnished to the Trustee. The instructions received by the Trustee from
         Participants shall be held by the Trustee in confidence and shall not
         be divulged or released to any person, including the Committee or
         officers or employees of the Company or its Affiliates. In the event
         any shares of Company Stock held in the Stock Suspense Account are
         tendered or exchanged pursuant to this Section 8.3, the proceeds shall
         at the direction of the Board of Directors of the Company either (i) if
         and to the extent the proceeds are attributable to unallocated Company
         Stock be used to repay installment purchase or other indebtedness used
         to purchase the Common Stock to which such proceeds are attributable or
         (ii) be reinvested in Company Stock within 90 days, or within such
         longer period as may be approved by the Commissioner of Internal
         Revenue.

                                      -66-
<PAGE>   73

                                   ARTICLE IX

                         TRUST AGREEMENT AND TRUST FUND

         9.1 Trust Agreement: As part of the Plan, the Company has entered into
the Trust Agreement with the Trustee. The provisions of such Trust Agreement are
herein incorporated by reference as fully as if set out herein, and the assets
held under said Trust Agreement on behalf of this Plan shall constitute the
Trust Fund.

         9.2 Benefits Paid Solely from Trust Fund: All of the benefits provided
to be paid under Article VI hereof shall be paid by the Trustee out of the Trust
Fund to be administered under such Trust Agreement. Neither the Employer nor the
Trustee shall be responsible or liable in any manner for payment of any such
benefits, and all Participants hereunder shall look solely to such Trust Fund
and to the adequacy thereof for the payment of any such benefits of any nature
or kind which may at any time be payable hereunder.

         9.3 Committee Directions to Trustee: The Trustee shall make only such
payments out of the Trust Fund as may be directed by the Committee. The Trustee
shall not be required to determine or make any investigation to determine the
identity or mailing address of any person entitled to any payments out of the
Trust Fund and shall have discharged its obligation in that respect when it
shall have sent checks or other papers by ordinary mail to such persons and
addresses as may be certified to it by the Committee.

         9.4 Trustee's Reliance on Committee Instructions: In any case where the
Trustee shall be required hereunder to act upon instructions to be received from
the Committee, the Trustee shall be protected in relying on any such
instructions which shall be in writing and signed by any member of, or Secretary
of, the Committee, and the Trustee shall be protected in relying upon the
authority to act of any person certified to it by the Company as a member of, or
Secretary of, the Committee until a successor to any such person shall be
certified to the Trustee by the Company.

         9.5 Authority of Trustee in Absence of Instructions from the Committee:
If at any time the Committee shall be incapable for any reason of giving any
directions, instructions or authorizations to the Trustee as are herein provided
for and as may be required incidental to the administration of this Plan, the
Trustee may act and shall be completely protected and without liability in so
acting without such directions, instructions and authorizations as it in its
sole discretion deems appropriate and advisable under the circumstances for the
carrying out of the provisions of this Plan. In the event of termination of this
Plan for any reason, the Committee shall be authorized to give all such
instructions to the Trustee, and the Trustee shall be protected in relying on
all such instructions, as may be necessary to make payment to any persons then
interested in the Trust Fund of all such amounts as are specified herein to be
paid under Section 10.5 hereof upon the termination of this Plan and the Trust
Agreement.

                                      -67-
<PAGE>   74

        9.6 Compliance with Exchange Act Rule 10(b)(18): At any time that the
Trustee makes open market purchases of Company Stock, the Trustee will either
(i) be an "agent independent of the issuer" as that term is defined in Rule
10(b)(18) promulgated pursuant to the Securities and Exchange Act of 1934, as
amended (the "Exchange Act") or (ii) make such open market purchases in
accordance with the provisions, and subject to the restrictions, of Rule
10(b)(18) of the Exchange Act.

                                      -68-
<PAGE>   75

                                    ARTICLE X

                     ADOPTION OF PLAN BY OTHER CORPORATIONS,
                   AMENDMENT AND TERMINATION OF THE PLAN, AND
                DISCONTINUANCE OF CONTRIBUTIONS TO THE TRUST FUND

         10.1 Adoption by Employers: Every Employer which shall have adopted the
Plan shall thereby become a participating Employer whose eligible Employees,
subject to the Plan provisions, shall make and receive Contributions and have
established for them Accounts under the Plan. Any corporation or other
organization with employees, now in existence or hereafter formed or acquired
which is not already an Employer under this Plan and which is otherwise legally
eligible may, with the approval of the Company as evidenced by action of the
Committee, adopt and become an Employer by executing and delivering to the
Committee and the Trustee an adoptive instrument specifying the classification
of its Employees who shall be eligible to participate in the Plan and evidencing
the terms of the Plan with respect to its eligible Employees. The adoptive
instrument may contain such changes and amendments in the terms and provisions
of the Plan as adopted by such Employer as may be desired by such Employer and
acceptable to the Committee. Any such Affiliate which shall adopt this Plan
shall designate the Company as its agent to act for it in all transactions
affecting the administration of the Plan and shall designate the Committee to
act for such corporation and its Participants in the same manner in which the
Committee may act for the Company and its Participants hereunder. The adoptive
instrument shall specify the effective date of such adoption of the Plan and
shall become, as to such corporation and its Employees, a part of this Plan.
Upon an Employer's liquidation, bankruptcy, insolvency, sale, consolidation or
merger to or with another organization that is not an Employer hereunder, in
which such Employer is not the surviving company, all obligations of that
Employer hereunder and under the Trust Agreement shall terminate automatically,
and the Trust Fund assets attributable to the Employees of such Employer shall
be held or distributed as herein provided unless, with the approval of the
Company as evidenced by action of the Committee, the successor to that Employer
assumes the duties and responsibilities of such Employer, by adopting this Plan
and the Trust Agreement, or by establishment of a separate plan and trust to
which the assets of the Trust Fund held on behalf of the Employees of such
Employer shall be transferred with the consent and agreement of that Employer.
Upon the consolidation or merger of two or more of the Employers under this Plan
with each other, the surviving Employer or organization shall automatically
succeed to all the rights and duties under the Plan and Trust Agreement of the
Employers involved.

         10.2 Continuous Service: The following special provisions shall apply
to all Employers:

                  (a) An Employee shall be considered in continuous Service
         while regularly employed simultaneously or successively by one or more
         Employers.

                  (b) The transfer of a Participant from one Employer to another
         Employer shall not be deemed a termination of Service.

                                      -69-
<PAGE>   76

         10.3 Amendment of the Plan: Except as otherwise expressly provided in
this Section, (i) the Company shall have the right to amend or modify this Plan
and the Trust Agreement (with the consent of the Trustee, if required) at any
time and from time to time to the extent that it may deem advisable and (ii) the
Committee shall have the right to amend or modify this Plan and the Trust
Agreement (with the consent of the Trustee, if required) to modify the
administrative provisions of the Plan, to change the Investment Funds offered
under the Plan and for any changes required by applicable law or by the Internal
Revenue Service to maintain the qualified status of the Plan and related Trust
at any time and from time to time to the extent that it may deem advisable. Any
such amendment or modification shall be set out in an instrument in writing duly
authorized by the Board of Directors of the Company or the Committee, as the
case may be, and executed by an appropriate officer of the Company or member of
the Committee. Upon delivery by the Company of such an instrument amending the
Plan to the Trustee, this Plan shall be deemed to have been amended or modified
in such manner and to such extent and effective as of the date therein set
forth, and thereupon any and all Participants whether or not they shall have
become such prior to such amendment or modification shall be bound thereby. No
such amendment or modification shall, however, increase the duties or
responsibilities of the Trustee without its consent thereto in writing, or have
the effect of transferring to or vesting in any Employer any interest or
ownership in any properties of the Trust Fund, or of permitting the same to be
used for or diverted to purposes other than for the exclusive benefit of the
Participants and their Beneficiaries. No such amendment shall decrease the
Account of any Participant or shall decrease any Participant's vested interest
in his Account. No amendment shall directly or indirectly reduce a Participant's
non-forfeitable vested percentage in his benefits under Section 6.1 of this
Plan, unless each Participant having not less than three years of Service is
permitted to elect to have his non-forfeitable vested percentage in his benefits
computed under the provisions of Section 6.1 without regard to the amendment.
Such election shall be available during an election period, which shall begin on
the date such amendment is adopted, and shall end on the latest of (i) the date
60 days after such amendment is adopted, (ii) the date 60 days after such
amendment is effective, or (iii) the date 60 days after such Participant is
issued written notice of the amendment by the Committee or the Employer.
Notwithstanding anything herein to the contrary, the Plan or the Trust Agreement
may be amended in such manner as may be required at any time to make it conform
to the requirements of the Code or of any United States statutes with respect to
employees' trusts, or of any amendment thereto, or of any regulations or rulings
issued pursuant thereto, and no such amendment shall be considered prejudicial
to any then existing rights of any Participant or his Beneficiary under the
Plan.

         10.4 Termination of the Plan: The Plan may be terminated pursuant to
the provisions of, and as of any subsequent date specified in, an instrument in
writing executed by the Company, and approved and authorized by the Board of
Directors of the Company, and which said instrument shall be delivered to the
Trustee.

         10.5 Distribution of Trust Fund on Termination: In the event of a
termination of the Plan by the Company, the assets and properties of the Trust
Fund shall be valued and allocated as provided in Sections 5.2 and 5.3, and each
Participant shall be fully vested in all amounts attributable to his Employer
Matching Account, his ESOP Account and his Prior Plan Accounts, and thereafter,
each

                                      -70-
<PAGE>   77

such Participant shall become entitled to distributions in respect of his
Accounts in the Plan in the manner as provided in Section 6.6 herein provided
that no Employer or Affiliate then establishes or maintains another defined
contribution plan (other than an employee stock ownership plan within the
meaning of Code Section 4975(e)(7) or Code Section 409 or a simplified employee
pension within the meaning of Code Section 408(k)). In the event the Plan is
terminated with respect to all Employers, any Company Stock held in the Suspense
Stock Account shall be sold to the extent necessary to pay the outstanding
principal balance and any accrued interest on any installment purchase contracts
and/or loan obligations of the Trust Fund incurred for the purpose of directly
or indirectly funding the purchase of such Stock, and any such installment
purchase contracts and/or loan obligations shall be paid in full prior to
distribution of the assets of the Trust Fund to Participants; provided, however,
that the Board of Directors of the Company may authorize distribution of Trust
Fund assets prior to satisfaction of installment purchase contracts and/or loan
obligations, but only if under applicable federal law such assets or income
attributable thereto cannot be used to repay such installment purchase contracts
or loan obligations.

       10.6 Effect of Discontinuance of Contributions: If the Company shall
discontinue its Contributions to the Trust Fund, or suspend its Contributions to
the Trust Fund under such circumstances so as to constitute a discontinuance of
Contributions within the purview of the reasoning of Treasury Regulations
Section 1.401-6(c), then all amounts theretofore credited to the Accounts of the
Participants shall become fully vested, and throughout any such period of
discontinuance of Contributions, all other provisions of the Plan shall continue
in full force and effect other than the provisions for Contributions by an
Employer or Participants and the forfeiture provisions of Section 6.1.

       10.7 Merger of Plan with Another Plan: In the case of any merger or
consolidation of the Plan with, or transfer in whole or in part of the assets
and liabilities of the Trust Fund to another trust fund held under, any other
plan of deferred compensation maintained or to be established for the benefit of
all or some of the Participants of this Plan, the assets of the Trust Fund
applicable to such Participants shall be transferred to the other trust fund
only if:

                  (a) Each Participant would (if either this Plan or the other
         plan then terminated) receive a benefit immediately after the merger,
         consolidation or transfer which is equal to or greater than the benefit
         he would have been entitled to receive immediately before the merger,
         consolidation or transfer (if this Plan had then terminated);

                  (b) Resolutions of the Board of Directors of the Employer
         under this Plan, and of any new or successor employer of the affected
         Participants, shall authorize such transfer of assets; and, in the case
         of the new or successor employer of the affected Participants, its
         resolutions shall include an assumption of liabilities with respect to
         such Participants' inclusion in the new employer's plan; and

                                      -71-
<PAGE>   78

                  (c) Such other plan and trust are qualified under Sections
         401(a) and 501(a) of the Code.

                                      -72-
<PAGE>   79

                                   ARTICLE XI

                           TOP-HEAVY PLAN REQUIREMENTS

       11.1 General Rule: For any Plan Year for which this Plan is a Top-Heavy
Plan, as defined in Section 11.8, and despite any other provisions of this Plan
to the contrary, this Plan shall be subject to the provisions of this Article
XI.

       11.2 Vesting Provisions: Each Participant who has completed an "Hour of
Service" (as defined in Section 3.6(a) hereof) after the Plan becomes top-heavy
and while the Plan is top-heavy and who has completed the Vesting Service
specified in the following table shall be vested in his Account under this Plan
at least as rapidly as is provided in the following schedule; except that the
vesting provision set forth in Section 6.1 shall be used at any time in which it
provides for more rapid vesting:

<TABLE>
<CAPTION>
                                                        Vesting
             Years of Vesting Service                  Percentage
             ------------------------                  ----------
             <S>                                       <C>
             Less than 2 years                            0%
             2 but less than 3 years                     20%
             3 but less than 4 years                     40%
             4 but less than 5 years                     60%
             5 but less than 6 years                     80%
             6 years or more                            100%
</TABLE>

If an Account becomes vested by reason of the application of the preceding
schedule, it may not therefore be forfeited by reason of re-employment after
retirement pursuant to a suspension of benefits provision, by reason of
withdrawal of any mandatory employee contributions to which employer
contributions were keyed, or for any other reason. If the Plan subsequently
ceases to be top-heavy, the preceding schedule shall continue to apply with
respect to any Participant who had at least three years of service (as defined
in Treasury Regulation Section 1.411(a)-8T(b)(3)) as of the close of the last
year that the Plan was top-heavy. For all other Participants, the
non-forfeitable percentage of their Accounts provided in the preceding schedule
prior to the date the Plan ceases to be top-heavy shall not be reduced.

        11.3 Minimum Contribution Provisions: Each Participant who (i) is a
Non-Key Employee, as defined in Section 11.8 and (ii) is employed on the last
day of the Plan Year will be entitled to have contributions and forfeitures (if
applicable) allocated to his Account of not less than 3% (the "Minimum
Contribution Percentage") of the Participant's Compensation. This minimum
allocation percentage shall be provided without taking Pre-Tax Contributions
into account. A Non-Key Employee may not fail to receive a Minimum Contribution
Percentage because of a failure to receive a specified minimum amount of
Compensation or a failure to make mandatory employee or elective contributions.
This Minimum Contribution Percentage will be reduced for any Plan Year to the
percentage at which contributions (including forfeitures) are made or are
required to be made

                                      -73-
<PAGE>   80

under the Plan for the Plan Year for the Key Employee for whom such percentage
is the highest for such Plan Year. For this purpose, the percentage with respect
to a Key Employee will be determined by dividing the contributions (including
forfeitures) made for such Key Employee by his total compensation (as defined in
Section 415 of the Code) not in excess of $160,000 for the Plan Year. Such
amount will be adjusted in the same manner as the amount set forth in Section
11.4 below.

                  Contributions considered under the first paragraph of this
Section 11.3 will include Employer contributions under this Plan and under all
other defined contribution plans required to be included in an Aggregation Group
(as defined in Section 11.8 below), but will not include Employer contributions
under any plan required to be included in such aggregation group if the plan
enables a defined benefit plan required to be included in such group to meet the
requirements of the Code prohibiting discrimination as to contributions in favor
of employees who are officers, shareholders, or the highly compensated or
prescribing the minimum participation standards. If the highest rate allocated
to a Key Employee for a year in which the Plan is top-heavy is less than 3%,
amounts contributed as a result of a salary reduction agreement must be included
in determining contributions made on behalf of Key Employees.

                  Employer Contributions made on behalf of Non-Key Employees
that are taken into account to satisfy the Minimum Contribution Percentage shall
not be treated as Employer Matching Contributions for purposes of determining
the Actual Contribution Percentage under Article IV and must meet the
non-discrimination requirements of Section 401(a)(4) without regard to Section
401(m).

                  Contributions considered under this Section 11.3 will not
include any contributions under the Social Security Act or any other federal or
state law.

         11.4 Limitation on Compensation: Each Participant's Compensation taken
into account under this Article XI and under Section 1.11 for purposes of
computing benefits under this Plan will not exceed $160,000, as adjusted by the
Secretary of the Treasury or his delegate. Such amount will be adjusted
automatically for each Plan Year to the amount prescribed by the Secretary of
the Treasury or his delegate pursuant to regulations for the calendar year in
which such Plan Year commences.

        11.5 Limitation on Contributions: Prior to January 1, 2000, in the event
that the Company, other Employer or an Affiliate (herein in this Article
collectively referred to as a "Considered Company") also maintains a defined
benefit plan providing benefits on behalf of Participants in this Plan, one of
the two following provisions will apply:

                  (a) If for the Plan Year this Plan would not be a Top-Heavy
          Plan if "90%" were substituted for "60%" in Section 11.8, then the
          percentage of 3% used in Section 11.3 is changed to 4%.

                                      -74-
<PAGE>   81

                  (b) If for the Plan Year this Plan would continue to be a
          Top-Heavy Plan if "90%" were substituted for "60%," in Section 11.8,
          then the denominator of both the defined contribution plan fraction
          and the defined benefit plan fraction will be calculated as set forth
          in Section 5.5 for the limitation year ending in such Plan Year by
          substituting "1.0" for "1.25" in each place such figure appears. This
          subsection (b) will not apply for such Plan Year with respect to any
          individual for whom there are no (i) Employer contributions,
          forfeitures or voluntary non-deductible contributions allocated to
          such individual or (ii) accruals earned under the defined benefit
          plan. Furthermore, the transitional rule set forth in Section
          415(e)(6)(B)(i) of the Code shall be applied by substituting
          "Forty-One Thousand Five Hundred Dollars ($41,500)" for "Fifty-One
          Thousand Eight Hundred Seventy-Five Dollars ($51,875)" where it
          appears therein.

                  From and after January 1, 2000, the provisions of this Section
11.5 shall no longer apply.

        11.6 Coordination with Other Plans: If another defined contribution or
defined benefit plan maintained by a Considered Company provides contributions
or benefits on behalf of a Participant in this Plan, the other plan will be
treated as part of this Plan pursuant to applicable principles prescribed by
U.S. Treasury Regulations or applicable IRS rulings (such as Revenue Ruling
81-202 or any successor ruling) to determine whether this Plan satisfies the
requirements of Sections 11.2, 11.3 and 11.4 and to avoid inappropriate
omissions or inappropriate duplication of minimum contributions. The
determination will be made by the Plan Administrator upon the advice of counsel.

                  In the event a Participant is covered by a defined benefit
plan which is top-heavy pursuant to Section 416 of the Code, a comparability
analysis (as prescribed by Revenue Ruling 81-202 or any successor ruling) shall
be performed in order to establish that the plans are providing benefits at
least equal to the defined benefit minimum.

        11.7 Distributions to Certain Key Employees: Notwithstanding any other
provision of this Plan, the entire interest in this Plan of each Participant who
is a Key Employee, by reason of clause (iii) of subparagraph (c) of Section 11.8
in the calendar year in which the Participant attains age 70 1/2, shall commence
to be distributed to such Participant not later than the April 1 following such
calendar year.

        11.8 Determination of Top-Heavy Status: The Plan will be a Top-Heavy
Plan for any Plan Year if, as of the Determination Date, the aggregate of the
Accounts under the Plan (determined as of the Valuation Date) for Participants
(including former Participants) who are Key Employees exceeds 60% of the
aggregate of the Accounts of all Participants, excluding former Key Employees,
or if this Plan is required to be in an Aggregation Group in any such Plan Year
in which such Group is a Top-Heavy Group. In determining Top-Heavy status if an
individual has not performed one Hour of Service for any Considered Company at
any time during the five-year period ending on the

                                      -75-
<PAGE>   82

Determination Date, any accrued benefit for such individual and the aggregate
Accounts of such individual shall not be taken into account.

                  For purposes of this Section, the capitalized words have the
following meanings:

                  (a) "Aggregation Group" means the group of plans, if any, that
          includes both the group of plans required to be aggregated and the
          group of plans permitted to be aggregated. The group of plans required
          to be aggregated (the "required aggregation group") includes:

                           (i) each plan of a Considered Company in which a Key
                  Employee is a participant; and

                           (ii) each other plan, including collectively
                  bargained plans, of a Considered Company which enables a plan
                  in which a Key Employee is a participant to meet the
                  requirements of Code Section 401(a)(4) or 410.

          The group of plans that are permitted to be aggregated (the
          "permissive aggregation group") includes the required aggregation
          group plus one or more plans of a Considered Company that is not part
          of the required aggregation group and that the Considered Company
          certifies as a plan within the permissive aggregation group. Such plan
          or plans may be added to the permissive aggregation group only if,
          after the addition, the aggregation group as a whole continues to
          satisfy the requirements of Code Sections 401(a)(4) and 410.

                  (b) "Determination Date" means for any Plan Year the last day
          of the immediately preceding Plan Year.

                  (c) "Key Employee" means any Employee or former Employee under
          this Plan who, at any time during the Plan Year in question or during
          any of the four preceding Plan Years, is or was one of the following:

                           (i) An officer of a Considered Company having an
                  annual compensation greater than 50% of the amount in effect
                  under Code Section 415(b)(1)(A) for any such Plan Year.
                  Whether an individual is an officer shall be determined by the
                  Considered Company on the basis of all the facts and
                  circumstances, such as an individual's authority, duties and
                  term of office, not on the mere fact that the individual has
                  the title of an officer. For any such Plan Year, officers
                  considered to be Key Employees will be no more than the fewer
                  of:

                                    (A) 50 employees; or

                                      -76-
<PAGE>   83

                                    (B) 10% of the employees or, if greater than
                           10%, three employees.

                  For this purpose, the highest paid officers shall be selected.

                           (ii) One of the ten employees owning (or considered
                  as owning, within the meaning of the constructive ownership
                  rules of Code Section 416(i)(1)(B)) the largest interests in
                  the Considered Company. An employee who has some ownership
                  interest is considered to be one of the top ten owners unless
                  at least ten other employees own a greater interest than that
                  employee. However, an employee will not be considered a top
                  ten owner for a Plan Year if the employee earns less than the
                  limitation in effect under Code Section 415(c)(1)(A) as in
                  effect for the calendar year in which the Determination Date
                  falls.

                           (iii) Any person who owns (or is considered as
                  owning, within the meaning of the constructive ownership rules
                  of Code Section 416(i)(1)(B)) more than 5% of the outstanding
                  stock of a Considered Company or stock possessing more than 5%
                  of the combined voting power of all stock of the Considered
                  Company.

                           (iv) Any person who has an annual compensation from
                  the Considered Company of more than One Hundred Fifty Thousand
                  Dollars ($150,000) and who owns (or is considered as owning,
                  within the meaning of the constructive ownership rules of Code
                  Section 416(i)(1)(B)) more than 1% of the outstanding stock of
                  the Considered Company or stock possessing more than 1% of the
                  outstanding stock of the Considered Company or stock
                  possessing more than 1% of the combined voting power of all
                  stock of the Considered Company. For purposes of this
                  subsection, Annual Compensation includes all items includable
                  as Compensation within the meaning of Section 11.8(k) and
                  further includes the amount otherwise excludable from an
                  employee's gross income by reason of Code Section 125,
                  402(e)(3) or 402(h)(1)(B).

          For purposes of this subsection (c), a Beneficiary of a Key Employee
          shall be treated as a Key Employee. For purposes of parts (iii) and
          (iv), each Considered Company is treated separately in determining
          ownership percentages; but all such Considered Companies shall be
          considered a single employer in determining the amount of
          compensation.

                                      -77-
<PAGE>   84

                  (d) "Non-Key Employee" means any employee (and any Beneficiary
          of an employee) who is not a Key Employee.

                  (e) "Top-Heavy Group" means the Aggregation Group if, as of
          the applicable Determination Date, the sum of the present value of the
          cumulative accrued benefits for Key Employees under all defined
          benefit plans included in the Aggregation Group plus the aggregate of
          the accounts of Key Employees under all defined contribution plans
          included in the Aggregation Group exceeds 60% of the sum of the
          present value of the cumulative accrued benefits for all employees,
          excluding former Key Employees as provided in paragraph (i) below,
          under all such defined benefit plans plus the aggregate accounts for
          all employees, excluding former Key Employees as provided in paragraph
          (i) below, under all such defined contribution plans. In determining
          Top-Heavy status, if an individual has not performed one Hour of
          Service for any Considered Company at any time during the five-year
          period ending on the Determination Date, any accrued benefit for such
          individual and the aggregate accounts of such individual shall not be
          taken into account. If the Aggregation Group that is a Top-Heavy Group
          is a required aggregation group, each plan in the group will be a
          Top-Heavy Plan. If the Aggregation Group that is a Top-Heavy Group is
          a permissive aggregation group, only those plans that are part of the
          required aggregation group will be treated as Top-Heavy Plans. If the
          Aggregation Group is not a Top-Heavy Group, no plan within such group
          will be a Top-Heavy Plan.

          In determining whether this Plan constitutes a Top-Heavy Plan, the
          Committee (or its agent) will make the following adjustments:

                  (f) When more than one plan is aggregated, the Committee shall
          determine separately for each plan as of each plan's Determination
          Date the present value of the accrued benefits (for this purpose using
          the actuarial assumptions set forth in the applicable plan) or account
          balance. The results shall then be aggregated by adding the results of
          each plan as of the Determination Dates for such plans that fall
          within the same calendar year.

                  (g) In determining the present value of the cumulative accrued
          benefit or the amount of the account of any employee, such present
          value or account will include the amount in dollar value of the
          aggregate distributions made to such employee under the applicable
          plan during the five-year period ending on the Determination Date
          unless reflected in the value of the accrued benefit or account
          balance as of the most recent Valuation Date. The amounts will include
          distributions to employees representing the entire amount credited to
          their accounts under the applicable plan.

                                      -78-
<PAGE>   85

                  (h) Further, in making such determination, such present value
          or such account shall include any rollover contribution (or similar
          transfer), as follows:

                           (i) If the rollover contribution (or similar
                  transfer) is initiated by the employee and made to or from a
                  plan maintained by another Considered Company, the plan
                  providing the distribution shall include such distribution in
                  the present value or such account and the plan accepting the
                  distribution shall not include such distribution in the
                  present value or such account unless the plan accepted it
                  before December 31, 1983.

                           (ii) If the rollover contribution (or similar
                  transfer) is not initiated by the employee or made from a plan
                  maintained by another Considered Company, the plan accepting
                  the distribution shall include such distribution in the
                  present value or such account, whether the plan accepted the
                  distribution before or after December 31, 1983; the plan
                  making the distribution shall not include the distribution in
                  the present value or such account.

                  (i) In any case where an individual is a Non-Key Employee with
          respect to an applicable plan but was a Key Employee with respect to
          such plan for any prior Plan Year, any accrued benefit and any account
          of such employee will be altogether disregarded. For this purpose, to
          the extent that a Key Employee is deemed to be a Key Employee if he or
          she met the definition of Key Employee within any of the four
          preceding Plan Years, this provision will apply following the end of
          such period of time.

                  (j) "Valuation Date" means for purposes for determining the
          present value of an accrued benefit as of the Determination Date the
          date determined as of the most recent valuation date which is within a
          12-month period ending on the Determination Date. For the first plan
          year of a plan, the accrued benefit for a current employee shall be
          determined either (i) as if the individual terminated service as of
          the Determination Date or (ii) as if the individual terminated service
          as of the valuation date, but taking into account the estimated
          accrued benefit as of the Determination Date. The Valuation Date shall
          be determined in accordance with the principles set forth in Q&A-T-25
          of Treasury Regulation Section 1.416-1.

                  (k) For purposes of this Section, "Compensation" shall have
         the meaning given to it in Section 5.5(d)(6) of the Plan.

                                      -79-
<PAGE>   86

                                   ARTICLE XII

                            MISCELLANEOUS PROVISIONS

        12.1 Terms of Employment: The adoption and maintenance of the provisions
of this Plan shall not be deemed to constitute a contract between the Employer
and any Employee, or to be a consideration for, or an inducement or condition
of, the employment of any person. Nothing herein contained shall be deemed to
give to any Employee the right to be retained in the employ of the Employer or
to interfere with the right of the Employer to discharge any Employee at any
time, nor shall it be deemed to give the Employer the right to require any
Employee to remain in its employ, nor shall it interfere with any Employee's
right to terminate his employment at any time.

        12.2 Controlling Law: This Plan and the Trust shall be construed,
regulated and administered under the laws of the State of Texas, subject,
however, to such determinations under the Plan as may be governed by ERISA and
related provisions of the Code.

        12.3 Invalidity of Particular Provisions: In the event any provision of
this Plan shall be held illegal or invalid for any reason, said illegality or
invalidity shall not affect the remaining provisions of this Plan but shall be
fully severable, and this Plan shall be construed and enforced as if said
illegal or invalid provisions had never been inserted herein.

        12.4 Non-Alienability of Rights of Participants: Except as otherwise
provided below and with respect to certain judgments and settlements pursuant to
Section 401(a)(13) of the Code, no interest, right or claim in or to the part of
the Trust Fund attributable to the Account of any Participant, or any
distribution of benefits therefrom, shall be assignable, transferable or subject
to sale, mortgage, pledge, hypothecation, commutation, anticipation,
garnishment, attachment, execution, claim or levy of any kind, voluntary or
involuntary (excluding a levy on an Account, other than the Pre-Tax Contribution
Account, for taxes filed upon the Plan by the Internal Revenue Service to the
extent valid and enforceable under applicable federal law), including without
limitation any claim asserted by a spouse or former spouse of any Participant,
and the Trustee shall not recognize any attempt to assign, transfer, sell,
mortgage, pledge, hypothecate, commute or anticipate the same. The preceding
sentence shall also apply to the creation, assignment or recognition of a right
to any benefit payable with respect to a Participant pursuant to a domestic
relations order, unless such order is determined to be a qualified domestic
relations order, as defined in Section 414(p) of the Code. The Committee shall
establish a written procedure to be used to determine the qualified status of
such orders and to administer distributions under such orders. Further, to the
extent provided under the qualified domestic relations order, a former spouse of
a Participant shall be treated as a spouse for all purposes of the Plan. If the
Committee receives a qualified domestic relations order with respect to a
Participant, the amount assigned to the Participant's former spouse may be
immediately distributed, to the extent permitted by law, from the vested portion
of the Participant's Account.

                                      -80-
<PAGE>   87

        12.5 Payments in Satisfaction of Claims of Participants: Any
distribution to any Participant or his Beneficiary or legal representative, in
accordance with the provisions of the Plan, of the interest in the Trust Fund
attributable to his Pre-Tax Contribution Account and/or After-Tax Contribution
Account, and the vested portion of his Employer Matching Account and ESOP
Account, shall be in full satisfaction of all claims under the Plan against the
Trust Fund, the Trustee, the Company, and the Employer. The Trustee may require
that any distributee execute and deliver to the Trustee a receipt and a full and
complete release of the Employer as a condition precedent to any payment or
distribution under the Plan.

        12.6 Payments Due Minors and Incompetents: If the Committee determines
that any person to whom a payment is due hereunder is a minor or is incompetent
by reason of physical or mental disability, the Committee shall have power to
cause the payments becoming due such person to be made to the guardian of the
minor or the guardian of the estate of the incompetent, or to the County Clerk
as allowed under law without the Committee or the Trustee being responsible to
see to the application of such payment. Payments made pursuant to such power
shall operate as a complete discharge of the Committee, the Trustee and the
Employer.

        12.7 Acceptance of Terms and Conditions of Plan by Participants: Each
Participant, through execution of the application required under the terms of
the Plan as a condition of participation herein, for himself, his heirs,
executors, administrators, legal representatives and assigns, approves and
agrees to be bound by the provisions of this Plan and the Trust Agreement and
any subsequent amendments thereto and all actions of the Committee and the
Trustee hereunder. In consideration of the adoption of this Plan by the Employer
and the Contributions of the Employer to the Trust Fund, each Participant agrees
by the execution of his application to participate herein to release and hold
harmless to the extent permitted by ERISA the Employer, the Committee and the
Trustee from any liability for any act whatsoever, past, present, or future,
performed in good faith in such respective capacities pursuant to the provisions
of this Plan or the Trust Agreement.

        12.8 Impossibility of Diversion of Trust Fund: Notwithstanding any
provision herein to the contrary, no part of the corpus or the income of the
Trust Fund shall ever be used for or diverted to purposes other than for the
exclusive benefit of the Participants or their Beneficiaries or for the payment
of expenses of the Plan. No part of the Trust Fund shall ever revert to the
Employer.

        12.9 Transition Period: Notwithstanding any provision of the Plan to the
contrary, during the period of transition from the provisions of the Prior Plans
to this Plan, commencing March 16, 1999 and ending on or about May 15, 1999 as
determined by the Committee in its sole discretion, the following restrictions
shall apply: (i) Participants may not change their investment directions with
respect to future contributions or existing Account balances; (ii) Participants
may be limited in their ability to make changes in the amount of their Pre-Tax
and After-Tax Contributions; and (iii) loans, withdrawals and distributions
otherwise available under the Plan may be temporarily delayed, all in accordance
with such administrative procedures as may be decided by the Committee and
communicated to Participants during said transition.

                                      -81-
<PAGE>   88

                  IN WITNESS WHEREOF, the BENEFITS COMMITTEE OF RELIANT ENERGY,
INCORPORATED has executed these presents as evidenced by the signatures affixed
hereto of its officers hereunto duly authorized, in a number of copies, all of
which shall constitute but one and the same instrument, which instrument may be
sufficiently evidenced by any such executed copy hereof, this 16th day of
December, 1999, effective as of April 1, 1999.

                                         BENEFITS COMMITTEE OF
                                         RELIANT ENERGY, INCORPORATED

                                         By /s/ LEE W. HOGAN
                                            ------------------------------------
                                              Lee W. Hogan
                                              Chairman

ATTEST:

/s/ LYNNE HARKEL-RUMFORD
----------------------------------
Lynne Harkel-Rumford
Secretary

                                      -82-
<PAGE>   89

                    RELIANT ENERGY, INCORPORATED SAVINGS PLAN

                                  ATTACHMENT A

                  Effective April 1, 1999, the following Investment Funds are
available for investment of amounts in a Participant Account in accordance with
the provisions of Section 8.1 of the Plan:

                  (a) Reliant Energy Common Stock Fund: Contributions are
         primarily invested and reinvested in Company Stock.

                  (b) Capital Appreciation Equity Fund: Contributions are
          primarily invested and reinvested in a pool of stock mutual funds that
          have a goal of long-term growth with little emphasis on current
          income. The mutual funds buy stocks of rapidly growing companies or
          companies with the potential for above average growth, including stock
          of small and international companies.

                  (c) Growth & Income Equity Fund: Contributions are primarily
          invested and reinvested in a pool of stock mutual funds that have a
          goal of long-term growth and current income. The mutual funds buy
          stocks of growing companies and companies that have a history of
          paying dividends.

                  (d) International Equity Fund: Contributions are primarily
          invested and reinvested in a pool of international stock mutual funds
          that have a goal of long-term growth with little emphasis on current
          income. These mutual funds buy stocks of growing and established
          companies that have their principal business activities outside of the
          United States and which show potential for growth.

                  (e) Balanced Fund: Contributions are primarily invested and
         reinvested in both bond mutual funds investing in high-quality bonds
         and stock mutual funds investing in a wide variety of companies.

                  (f) Fixed Income Fund: Contributions are primarily invested
         and reinvested in a fixed income mutual fund. The mutual fund invests
         in high-quality government and corporate bonds and other fixed income
         securities.

                  (g) Money Market Fund: Contributions are primarily invested
         and reinvested in a money market fund. The fund invests in high-quality
         government and corporate fixed income securities with maturities of
         less than one year.

                  (h) S&P 500 Index Fund: Contributions are primarily invested
         and reinvested in a stock mutual fund that seeks to track the
         investment performance of

                                       A-1
<PAGE>   90

         the S&P 500 Composite Index, which emphasizes stocks of large U.S.
         Companies. The fund follows a simple, cost-effective index-matching
         strategy.

                  The Committee reserves the right to add and/or delete
Investment Funds, with the exception of the Reliant Energy Common Stock Fund,
from time to time and at any time.

                  IN WITNESS WHEREOF, the BENEFITS COMMITTEE OF RELIANT ENERGY,
INCORPORATED has executed this Attachment A as evidenced by the signatures
affixed hereto of its officers hereunto duly authorized, in a number of copies,
all of which shall constitute but one and the same instrument, which instrument
may be sufficiently evidenced by any such executed copy hereof, this 16th day
of December, 1999, effective as of April 1, 1999.

                                          BENEFITS COMMITTEE OF
                                          RELIANT ENERGY, INCORPORATED

                                          By /s/ LEE W. HOGAN
                                             -----------------------------------
                                               Lee W. Hogan
                                               Chairman

ATTEST:

/s/ LYNNE HARKEL-RUMFORD
-----------------------------------
Lynne Harkel-Rumford
Secretary

                                       A-2<PAGE>   1
                                                           EXHIBIT 10(cc)(2)

                                                           HI Benefits Committee

                         HOUSTON INDUSTRIES INCORPORATED
                                  SAVINGS PLAN

                (As Amended and Restated Effective July 1, 1995)

                                 Sixth Amendment

                  The Benefits Committee of Houston Industries Incorporated,
having reserved the right under Section 10.3 of the Houston Industries
Incorporated Savings Plan, as amended and restated effective July 1, 1995, and
thereafter amended (the "Plan"), to amend the Plan, does hereby amend the Plan
as follows:
                  1. Effective as of April 1, 1999, or such later date as
prescribed by paragraph 2 hereof, Section 8.2 of the Plan is hereby amended in
its entirety as follows:

                  "8.2 Diversification Election:

                      (a) Each Participant who has (i) completed at least ten
           years of participation in the Plan and the Prior Plan and (ii)
           attained age 55 (hereinafter, a "Qualified Participant") may elect
           within 90 days after the close of each Plan Year in the initial
           election period (as defined herein), to direct the investment of up
           to 25% of the sum of the balances in such Participant's ESOP Account
           and Employer Matching Account (to the extent such portion exceeds the
           amount to which a prior election to diversify under this Section
           8.2(a) applies) into any or all Investment Funds with the exception
           of the HI Common Stock Fund, and such election shall be effective as
           of the last Valuation Date in March. In each Plan Year after the
           initial election period, the percentage shall be 50% instead of 25%.
           The initial election period means the five Plan Year period beginning
           with the first Plan Year in which the Participant first became a
           Qualified Participant.

                      (b) Each Participant may elect, once each calendar year in
           the manner and subject to such rules, procedures and overriding Plan
           limits as specified by the Committee, to direct the investment of up
           to 50% of the sum of the balances in the Participant's ESOP Account
           and Employer Matching Account which are attributable to Employer
           Contributions made with respect to periods on or after April 1, 1999
           into any or all Investment Funds with the exception of the HI Common
           Stock Fund; provided, however, that at least 50% of the aggregate sum
           of the balances in the ESOP Accounts and Employer Matching Accounts
           of all Participants must be invested in Company Stock. Such election
           shall be effective as soon as reasonably practicable following
           receipt of the election to diversify, but in no event

<PAGE>   2

         shall the election be effective earlier than the close of business on
         the Valuation Date on which the election is received. Any amounts so
         diversified and reinvested may subsequently be directed by the
         Participant in the same manner as amounts in the Participant's
         After-Tax and Pre-Tax Contribution Accounts as described in Section
         8.1, except that none of the amounts so diversified may be invested in
         the HI Common Stock Fund."

                  2. This Amendment shall not become effective unless and until
(i) the Internal Revenue Service issues a favorable determination letter
indicating that the Amendment will not adversely affect the Plan's qualification
under Section 401(a) of the Internal Revenue Code of 1986 (the "Code") or the
Plan's classification as an "Employee Stock Ownership Plan," as defined in
Section 4975(e)(7) of the Code, and (ii) the Benefits Committee (by formal
written resolution) elects to implement the terms of the Amendment on or after
April 1, 1999.

                  IN WITNESS WHEREOF, the Company has caused these presents to
be executed by its duly authorized officer in a number of copies, all of which
shall constitute one and the same instrument, which may be sufficiently
evidenced by any executed copy hereof, this 29th day of April, 1999, but
effective as of the date specified herein.

                                                 BENEFITS COMMITTEE OF
                                                 HOUSTON INDUSTRIES INCORPORATED

                                                 By LEE W. HOGAN
                                                 ----------------------------
                                                    Lee W. Hogan, Chairman

ATTEST:

ELIZABETH P. WEYLANDT
--------------------------------
Elizabeth P. Weylandt, Secretary

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