PUBLIC SERVICE COMPANY OF NEW MEXICO

                     MASTER DECOMMISSIONING TRUST AGREEMENT

                                       FOR

                      PALO VERDE NUCLEAR GENERATING STATION





                                                         Dated:  March ___, 1996

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                                TABLE OF CONTENTS


ARTICLE                                     TITLE                          PAGE

I        DEFINITIONS AND PURPOSE............................................  4

         1.01     Definitions...............................................  4
         1.02     Authorization............................................. 11
         1.03     Purposes.................................................. 11
         1.04     Establishment of the Fund................................. 11
         1.05     Acceptance of Appointment................................. 12
         1.06     Name of Master Trust...................................... 12
         1.07     Segregation of Master Trust............................... 12

II       DISPOSITIVE PROVISIONS............................................. 13

         2.01     Payment of Nuclear Decommissioning Costs.................. 13
         2.02     Additions to the Funds.................................... 15
         2.03     Adjustments for Excess Contributions...................... 15
         2.04     Transfers Between Funds................................... 16
         2.05     Designation of Funds...................................... 16
         2.06     Distribution of Income.................................... 16
         2.07     No Transferability of Interest in Trust................... 17
         2.08     Revocation and Termination of Agreement................... 18
         2.09     Termination of Qualified Funds............................ 19
         2.10     Distribution of Assets Upon Termination................... 19
         2.11     Alterations and Amendments................................ 20
         2.12     No Authority to Conduct Business.......................... 20

III      TRUSTEES........................................................... 21

         3.01     Designation and Qualification of Successor
                  Trustee(s)................................................ 21
         3.02     Resignation............................................... 22
         3.03     Compensation.............................................. 22
         3.04     Accounts.................................................. 22
         3.05     Tax Returns and Other Reports............................. 23
         3.06     Liability................................................. 24
         3.07     Indemnity of Trustee...................................... 26

IV       INVESTMENTS........................................................ 26

         4.01     Appointment of Investment Manager(s)...................... 26
         4.02     Direction by Investment Managers.......................... 27

V        TRUSTEE'S GENERAL POWERS........................................... 29

         5.01     Payment of Expenses of Administration..................... 29
         5.02     Extension of Obligations and Negotiation of
                  Claims.................................................... 30
         5.03     Registration of Securities................................ 30
         5.04     Location of Assets........................................ 30
         5.05     Retention of Professional Services........................ 30
         5.06     Delegation of Ministerial Powers.......................... 30

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         5.07     Powers of Trustee to Continue Until Final
                  Distribution.............................................. 31
         5.08     Voting.................................................... 31
         5.09     Power to Join in or Dissent From Certain Events........... 31
         5.10     Prohibition Against Real Estate Investment................ 32
         5.11     Discretion in Exercise of Powers.......................... 32

VI       TRUSTEE'S INVESTMENT POWERS........................................ 33

         6.01     Investment Standards...................................... 33
         6.02     Investment of Funds....................................... 34
         6.03     Management of Master Trust................................ 34
         6.04     Disposition of Investments................................ 35
         6.05     Power to Hold Uninvested Cash............................. 35
         6.06     Cash Sweep Provision...................................... 35

VII      MISCELLANEOUS...................................................... 36

         7.01     Headings.................................................. 36
         7.02     Particular Words.......................................... 36
         7.03     Parties Interested Herein................................. 36
         7.04     Severability of Provisions................................ 36
         7.05     Form and Content of Communications........................ 37
         7.06     Delivery of Notices Under Agreement....................... 37
         7.07     Successors and Assigns.................................... 38
         7.08     Governing Jurisdiction.................................... 38
         7.09     Accounting Year........................................... 38
         7.10     Counterparts.............................................. 39
         7.11     Disbursement Withdrawal Certificate....................... 39



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                      PUBLIC SERVICE COMPANY OF NEW MEXICO

                     MASTER DECOMMISSIONING TRUST AGREEMENT

                                       FOR

                      PALO VERDE NUCLEAR GENERATING STATION






                                       04/22/96/BSD/05043/003/AGREE-11//50628.2



                      PUBLIC SERVICE COMPANY OF NEW MEXICO
                     MASTER DECOMMISSIONING TRUST AGREEMENT
                                       FOR
                      PALO VERDE NUCLEAR GENERATING STATION


         AGREEMENT  made the 15th day of  March,  1996,  by and  between  Public
Service Company of New Mexico, a New Mexico corporation ("Company"),  and Mellon
Bank, N.A., a national banking association,
having trust powers ("Trustee").

         WHEREAS,  the Company is the:  (1) lessee of a 10.2  percent  undivided
interest in Unit One of the Palo Verde Nuclear Generating Station; (2) lessee of
a 10.2  percent  undivided  interest  in  Unit  Two of the  Palo  Verde  Nuclear
Generating  Station;  and (3) owner of a 10.2 percent undivided interest in Unit
Three of the Palo Verde Nuclear Generating Station; and

         WHEREAS,  an  affiliate  of the  Trustee is an owner  participant  with
respect to: (1) the Company's  leasehold interest in 1.36 percent of Unit One of
the Palo Verde  Nuclear  Generating  Station;  and (2) the  Company's  leasehold
interest in  approximately  2.49  percent of Unit Two of the Palo Verde  Nuclear
Generating Station;

         WHEREAS,  the Company is subject to regulation by the New Mexico Public
Utility Commission ("NMPUC"),  an agency of the State of New Mexico, the Nuclear
Regulatory Commission ("NRC"), an agency of the United States government created
and existing  pursuant to 42 U.S.C. ss. 5841, and the Federal Energy  Regulatory
Commission  ("FERC"),  an agency of the United  States  government  created  and
existing pursuant to 42 U.S.C. ss.ss.7134 and 7171; and

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         WHEREAS,  the Company has elected to satisfy certain regulations of the
NRC found at 10 C.F.R.  ss.50.75(e) by the  establishment of an external sinking
fund,  consisting of the Funds described herein, to provide financial  assurance
for the  decommissioning  of Palo Verde Unit 1, Palo Verde Unit 2 and Palo Verde
Unit 3; and

         WHEREAS,  the NMPUC has permitted the Company to include in its cost of
service for ratemaking  purposes  certain amounts in order to provide monies for
the  Company's  share of  decommissioning  costs with  respect to the Palo Verde
Nuclear Generating Station ("Station"); and

         WHEREAS,  the Funds  established  herein are  intended  to satisfy  the
Company's  obligation  to  accumulate  funds  for the  payment  of its  share of
Termination  Costs for Palo  Verde Unit 1, Palo Verde Unit 2 and Palo Verde Unit
3,  in  accordance  with  the   requirements  of  Section  8A.7.2  of  the  ANPP
Participation Agreement; and

         WHEREAS, pursuant to Section 468A of the Internal Revenue Code of 1986,
26 U.S.C.  ss. 1 et seq.,  certain  Federal income tax benefits are available to
the  Company  by  creating  and   contributing   monies  to  qualified   nuclear
decommissioning reserve funds associated with the Station; and

         WHEREAS,  the  Company  wishes  to  establish  both  qualified  nuclear
decommissioning reserve funds and nonqualified nuclear decommissioning reserve
funds to hold monies for decommissioning the Station; and

                                        2

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         WHEREAS,  the  Company  wishes  to  establish  a Master  Trust  for the
collective  investment of the assets of the qualified and  nonqualified  nuclear
decommissioning  reserve  funds  for  the  Station,   wherein  each  Fund  shall
constitute a separate trust under the Master Trust; and

         WHEREAS,  the assets of each of the qualified and nonqualified  nuclear
decommissioning  reserve  funds  shall be deemed to have been  transferred  to a
Master Trust to be held hereunder for the benefit of such Funds; and

         WHEREAS,  pursuant  to the ANPP  Participation  Agreement,  any trustee
hereunder shall be: (1) a corporation organized and existing under and by virtue
of the laws of the United States or of any State; (2) authorized under such laws
to  exercise   corporate  trust  powers;  and  (3)  subject  to  supervision  or
examination  by federal or state banking or trust  authorities  and shall not be
owned by or subject to the control,  except as provided therein,  of the Company
or any other direct or indirect  participant in the Station or any parent or any
other  subsidiary of any parent of the Company or any other  participant  in the
Station.

         NOW,  THEREFORE,   in  consideration  of  the  mutual  promises  herein
contained, the Company hereby agrees to deliver to the Trustee and the Trustee

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hereby agrees to receive the initial contribution of assets pursuant to this
Agreement on or before March 15, 1996; and

         TO HAVE AND HOLD,  such assets and such assets as may from time to time
be  added   thereto  as  provided   herein,   together  with  the  proceeds  and
reinvestments thereof unto the Trustee;

         IN TRUST NEVERTHELESS, for the uses and purposes and upon the terms and
conditions hereinafter set forth:

                                        I

                             DEFINITIONS AND PURPOSE

         1.01 Definitions.  As used in this Agreement, the following terms shall
have the following meanings:

         (1)    "Agreement"  shall mean and include this Master  Decommissioning
                Trust  Agreement,  as the same may from time to time be amended,
                modified, or supplemented.

         (2)    "ANPP  Participation  Agreement"  shall mean the Arizona Nuclear
                Power Project  Participation  Agreement,  dated as of August 23,
                1973, among the Company,  Arizona Public Service  Company,  Salt
                River  Project,  Southern  California  Edison  Company,  El Paso
                Electric Company,  the Los Angeles Department of Water and Power
                and  the  Southern   California   Public  Power  Authority,   as
                heretofore and hereafter amended pursuant to the terms thereof.

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         (3)    "Authorized  Representative"  shall  mean  the  Chief  Executive
                Officer,  President,  Treasurer,  or any Vice  President  of the
                Company,  or  any  other  person  designated  as  an  Authorized
                Representative of the Company.

         (4)    "Board of  Directors"  shall mean the Board of  Directors of the
                Company,  or the Executive  Committee  thereof,  as duly elected
                from time to time.

         (5)    "Certificate"   or   "Certification"   shall   mean  a   written
                certificate  signed  by two  Authorized  Representatives  of the
                Company for a certificate of the Company.

         (6)    "Code" shall mean the Internal Revenue Code of 1986, as the same
                may be amended from time to time.

         (7)    "Company"  shall  have  the  meaning  set  forth  in  the  first
                paragraph of this Agreement.

         (8)    "Decommissioning   Costs"  shall  mean  the  costs  incurred  in
                decommissioning  the Plants and shall include  Termination Costs
                as defined in the ANPP Participation Agreement.

         (9)    "Disbursement   Certificate"  shall  mean  a  document  properly
                completed and executed by two Authorized  Representatives of the
                Company and substantially in the form of Exhibit A hereto.

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         (10)   "Excess  Contribution"  shall  have  the  meaning  set  forth in
                Section 2.03 hereof.

         (11)   "Fund"  shall  mean  any one of the  Qualified  or  Nonqualified
                Funds.

         (12)   "Funds"  shall  mean the  Qualified  Funds and the  Nonqualified
                Funds, collectively.

         (13)   "Investment  Manager(s)"  shall mean the fiduciary  specified in
                the Investment Manager Agreement(s):

                (a)  Which has been retained by the Company to manage,  acquire,
                     or dispose of any asset belonging to any Fund; and

                (b)  Which is:

                     (i)    registered  as  an  investment   adviser  under  the
                            Investment Advisers Act of 1940, or

                     (ii)   a bank, as defined in that Act, or

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                     (iii)  an insurance  company  qualified   to   perform,  as
                            described in subsection (a) above, under the laws of
                            more than one state, and

                (c)  Which has acknowledged,  in writing, that it is a fiduciary
                     with  respect to the  Funds,  that it is  qualified  to act
                     under  subsection (b) above,  and has agreed to be bound by
                     all  of  the  terms,  provisions,  and  covenants  of  this
                     Agreement.

         (14)   "Investment  Manager  Agreement(s)"  shall mean the agreement(s)
                between the Company and an investment manager(s) selected by the
                Company which agreement  governs the management of the assets of
                the Funds.

         (15)   "Master Trust" shall be used merely to refer to the Funds in the
                aggregate  and is not  intended  nor should it be  construed  to
                constitute a separate entity.

         (16)   "Nonqualified   Funds"   shall   mean  the  Palo  Verde  Unit  1
                Nonqualified  Fund, Palo Verde Unit 2 Nonqualified Fund and Palo
                Verde Unit 3 Nonqualified Fund, collectively.

         (17)   "NMPUC" shall mean the New Mexico Public Utility Commission,  as
                defined  and set forth in the New  Mexico  Public  Utility  Act,
                Sections 62-3-1 et seq., New Mexico Statutes Annotated (1978).

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         (18)   "Palo  Verde  Unit 1" shall  mean  Unit  One of the  Palo  Verde
                Nuclear Generating Station.

         (19)   "Palo  Verde  Unit  1  Qualified   Fund"  shall  mean  the  Fund
                established   and   maintained    under   this   Agreement   for
                decommissioning   Palo  Verde   Unit  1  to  which   monies  are
                contributed subject to the conditions and limitations of Section
                468A of the Code, plus earnings and appreciation thereon.

         (20)   "Palo  Verde  Unit  1   Nonqualified   Fund"  shall  consist  of
                contributions by the Company for decommissioning Palo Verde Unit
                1 (but only to the extent such  Contributions  are not deposited
                and  maintained  in the Palo Verde Unit 1  Qualified  Fund) plus
                earnings and appreciation thereon.

         (21)   "Palo  Verde  Unit 2" shall  mean  Unit  Two of the  Palo  Verde
                Nuclear Generating Station.

         (22)   "Palo  Verde  Unit  2  Qualified   Fund"  shall  mean  the  Fund
                established   and   maintained    under   this   Agreement   for
                decommissioning   Palo  Verde   Unit  2  to  which   monies  are
                contributed subject to the conditions and limitations of Section
                468A of the Code, plus earnings and appreciation thereon.


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         (23)   "Palo  Verde  Unit  2   Nonqualified   Fund"  shall  consist  of
                contributions by the Company for decommissioning Palo Verde Unit
                2 (but only to the extent such  Contributions  are not deposited
                and  maintained  in the Palo Verde Unit 2  Qualified  Fund) plus
                earnings and appreciation thereon.

         (24)   "Palo  Verde  Unit 3" shall  mean Unit  Three of the Palo  Verde
                Nuclear Generating Station.

         (25)   "Palo  Verde  Unit  3  Qualified   Fund"  shall  mean  the  Fund
                established   and   maintained    under   this   Agreement   for
                decommissioning   Palo  Verde   Unit  3  to  which   monies  are
                contributed subject to the conditions and limitations of Section
                468A of the Code, plus earnings and appreciation thereon.

         (26)   "Palo  Verde  Unit  3   Nonqualified   Fund"  shall  consist  of
                contributions by the Company for decommissioning Palo Verde Unit
                3 (but only to the extent such  contributions  are not deposited
                and  maintained  in the Palo Verde Unit 3  Qualified  Fund) plus
                earnings and appreciation thereon.


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         (27)   "Qualified  Fund" shall mean a nuclear  decommissioning  reserve
                fund as defined in section 468A(e) of the Code.

         (28)   "Service" shall mean the Internal Revenue Service.

         (29)   "Station" shall mean the Palo Verde Nuclear  Generating  Station
                Units 1, 2 and 3, collectively.

         (30)   "Termination Costs" shall have the meaning set forth in the ANPP
                Participation Agreement.

         (31)   "Trustee"  shall  have  the  meaning  set  forth  in  the  first
                paragraph of this Agreement.

         (32)   "Withdrawal   Certificate"   shall  mean  a  document   properly
                completed and executed by two Authorized  Representatives of the
                Company and substantially in the form of Exhibit B hereto.

         1.02  Authorization.  The Trustee and the Company hereby  represent and
warrant that each has full legal  authority and is duly  empowered to enter into
this Agreement, and has taken all action necessary to authorize the execution of
this Agreement by the officers and persons signing it.

         1.03 Purposes.  The exclusive purposes of this Agreement are to provide
assets  for the  decommissioning  of the  Station  that  are  sufficient  in the
aggregate: (1) to pay the Company's share (determined  pursuant  to Sections

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8A.7.2 and 23.5.1 of the ANPP  Participation  Agreement) of Termination Costs of
Palo Verde Unit 1, Palo Verde Unit 2 and Palo Verde Unit 3; (2) to pay the costs
of  managing,   investing  and  administering  the  Funds,  including,   without
limitation,  legal,  accounting,  actuarial and trustee expenses,  and taxes, if
any, levied on the Funds or on any investment income derived therefrom;  and (3)
to constitute qualified and nonqualified nuclear  decommissioning  funds for the
Units (the  Qualified  Funds being  established  pursuant to Section 468A of the
Code and any applicable  successor  provisions and the regulations  thereunder).
The assets of the  Qualified  Funds may be used only in a manner  authorized  by
Code section 468A and the regulations thereunder.

                1.04 Establishment of the Funds. By execution of this Agreement,
the Company:

                      (a)  establishes the Funds, each of which shall
                           constitute a trust consisting of such
                           contributions as may be delivered to the
                           Trustee by the Company designated for such
                           Fund.  Each Fund also shall include additional
                           contributions (or other contributions as
                           described in Section 2.02) designated for such
                           Fund, together with investments and
                           reinvestments thereon; and

                      (b)  appoints Mellon Bank as Trustee of each of the
                           Funds.

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         1.05  Acceptance of Appointment.  Upon the terms and conditions  herein
set forth,  Mellon Bank,  N.A.  accepts the appointment as Trustee of the Funds.
The Trustee shall receive any contributions deposited with it by the Company and
shall hold,  manage,  invest and administer  such  contributions,  together with
earnings and appreciation thereon, in accordance with this Agreement.

         1.06 Name of Master Trust.  The  contributions  received by the Trustee
from the Company  together with the  proceeds,  reinvestments  and  appreciation
thereof  shall  constitute  the  "Public  Service  Company of New Mexico  Master
Decommissioning Trust."

         1.07  Segregation of Master Trust. The Master Trust shall be divided by
the Trustee into the Funds as follows:

         (a)   Palo Verde Unit 1 Qualified Fund;
         (b)   Palo Verde Unit 1 Nonqualified Fund;
         (c)   Palo Verde Unit 2 Qualified Fund;
         (d)   Palo Verde Unit 2 Nonqualified Fund;
         (e)   Palo Verde Unit 3 Qualified Fund;
         (f)   Palo Verde Unit 3 Nonqualified Fund.

         The Trustee  shall  maintain  such records as are  necessary to reflect
each Fund  separately  on its books from each  other  Fund and shall  create and
maintain such subaccounts (including any subaccounts required to satisfy Federal
Energy Regulatory Commission requirements) within each Fund as the Company shall
direct.

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                                       II

                             DISPOSITIVE PROVISIONS

         After  payment of the expenses  described  in Section 5.01 hereof,  the
Trustee shall distribute the assets of the Funds as follows:

         2.01 Payment of Nuclear  Decommissioning  Costs. The Trustee shall make
payments  of  the  Decommissioning   Costs  in  accordance  with  the  following
procedures:

                (1)  Authorized  Representative.   The  Company  shall  promptly
                     notify the Trustee of the selection and  appointment of any
                     Authorized Representative of the Company. The Trustee shall
                     have no duty to inquire into or  investigate  the continued
                     authority   of  such  person  to  act  as  the   Authorized
                     Representative.  The Company shall provide the Trustee with
                     written  notice  of  the   termination  of  any  Authorized
                     Representative's authority.

                (2)  Disbursements  to Third  Parties.  Requests for payments of
                     Decommissioning   Costs  to  any  person  (other  than  the
                     Company)  for  goods  provided  or labor or other  services
                     rendered   to  the   Company   in   connection   with   the
                     decommissioning  of the Plants  shall be  submitted  by the
                     Company to the Trustee on a Disbursement Certificate.


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                (3)  Reimbursement to the Company.  Requests for payments to the
                     Company in reimbursement of Decommissioning  Costs actually
                     incurred  by the  Company  and paid by the  Company  to any
                     other  person  shall be  submitted  by the  Company  to the
                     Trustee on a Withdrawal Certificate.

                (4)  Payment of  Decommissioning  Costs.  The Trustee  shall pay
                     Decommissioning  Costs when a  Disbursement  Certificate or
                     Withdrawal  Certificate is filed with the Trustee,  showing
                     with respect to each withdrawal of money:

                     (a)  the name and  address  of the person or entity to whom
                          payment is due (which may be the Company);

                     (b)  the amount of money to be paid; and

                     (c)  the  purpose for which the  obligation  to be paid was
                          incurred.

                     Each  Disbursement  Certificate  or Withdrawal  Certificate
                     must   certify   that   the   expenses   paid    constitute
                     Decommissioning   Costs  and  shall  provide   satisfactory
                     evidence  to the  Trustee  that  such  expenses  have  been
                     incurred.

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         2.02  Additions  to the  Funds.  From time to time  after  the  initial
contribution  and prior to the  termination of this  Agreement,  the Company may
make,  and the  Trustee  shall  accept,  additional  contributions  of assets to
satisfy  the  purposes of this  Agreement  as set forth in Section  1.03,  which
contributions shall be made to the applicable Fund(s).

         2.03 Adjustments for Excess Contributions.  The Trustee and the Company
understand  and agree that the  contributions  made by the Company to any of the
Qualified  Funds from time to time may exceed  the amount  permitted  to be paid
into such  fund(s)  pursuant  to  Section  468A of the Code and any  regulations
thereunder  based upon changes in  estimates,  subsequent  developments,  or any
other event or occurrence  which could not reasonably  have been foreseen by the
Company  at the time such  contribution  was made  (Excess  Contribution).  Upon
Certification   of  the  Company,   setting  forth  the  amount  of  the  Excess
Contribution,  the amount of any Excess  Contribution  (together with any income
accrued thereon) shall be paid to the person or persons specified by the Company
in a Certification to the Trustee.

         2.04 Transfers Between Funds. The Trustee shall transfer assets between
Funds only upon written instructions from the Company.


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         2.05 Designation of Funds. Upon: (a) the initial contribution;  (b) any
withdrawal from any Fund for  Decommissioning  Costs pursuant to Section 2.01 or
for  administrative  expense  pursuant to Section 5.01;  (c) any addition to any
Fund  pursuant to Section  2.02;  or (d) any  adjustment to any Fund pursuant to
section 2.03, the Company shall designate, by Certificate, the appropriate Funds
which are to be credited or debited by such contribution,  withdrawal, addition,
or adjustment,  and the Trustee shall credit or debit the  appropriate  Funds in
accordance with such designation.

         2.06  Distribution  of Income.  Upon  written  consent of the  Company,
assets of a Qualified Fund established pursuant to this Agreement may be pooled,
but only with the assets of another Qualified Fund established  pursuant to this
Agreement,  and  assets of a  Nonqualified  Fund  established  pursuant  to this
Agreement may be pooled,  but only with the assets of another  Nonqualified Fund
established  pursuant to this Agreement,  provided that the following conditions
are satisfied:  (i) the Trustee must separately  account for the  contributions,
earnings,  expenses,  and  distributions  of such Fund;  (ii) the  earnings  and
expenses must be reasonably  apportioned  among such Funds;  (iii) the books and
records of such Funds must enable the Service to verify that the requirements of
Code section 468A and the  regulations  thereunder  are  satisfied.  Any pooling
arrangement  undertaken  as permitted in this Section 2.06 can be  terminated at
any time by any Fund. No Fund in such a pooling  arrangement  may substitute for
itself  in such  arrangement  any  person  that is not a member  of the  pooling
arrangement. Notwithstanding the foregoing, the provisions of this Section 2.06

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shall not limit  the  Trustee's  authority  to invest in  permissible  common or
collective trust funds.

         2.07 No  Transferability  of  Interest  in Trust.  The  interest of the
Company in the Funds is not transferable by the Company,  whether voluntarily or
involuntarily,  nor subject to the claims of creditors of the Company, provided,
however, that any creditor of the Company as to which a Disbursement Certificate
has been  properly  completed  and  submitted to the Trustee may claim  directly
against the appropriate  Fund in an amount not to exceed the amount specified on
such Disbursement  Certificate.  Nothing herein shall be construed to prohibit a
transfer  of the  Company's  interest  in a Fund upon sale of all or part of the
Company's ownership or leasehold interest in any plant or plants.

         2.08 Revocation and Termination of Agreement.  The Company reserves the
power  to  revoke  this  Agreement,  in  whole  or in  part,  by  instrument  or
instruments  in writing  delivered to the Trustee ninety (90) days in advance of
the proposed  revocation;  provided,  however,  that the assets of the Funds are
transferred to another  decommissioning  trust or otherwise dedicated to payment
of  Decommissioning  Costs  and other  expenses  permitted  hereunder;  provided
further,  however,  that absent  revocation by the Company,  this Agreement will
terminate (in whole or in part) upon the earlier of:

                (1)  Receipt by the  Trustee of a  Certificate  from the Company
                     stating  that   substantial   completion   of  the  nuclear
                     decommissioning  of the Plants has  occurred (as defined in
                     Treasury  Regulations  promulgated  under Code Section 468A
                     and   consistent   with  the   requirements   of  the  ANPP
                     Participation Agreement);


                                       17

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2



                (2)  The twentieth  anniversary  of the date of the death of the
                     survivor  from  among  a  class  consisting  of  all of the
                     descendants of John D.  Rockefeller,  late of New York, New
                     York, born on or prior to January 1, 1996; or

                (3)  At such earlier time as the Company may  terminate all or a
                     portion of the Funds.

         2.09   Termination of Qualified Funds.  One or more of the Qualified
Funds shall terminate upon the earlier of:

                (1)  Its  disqualification  from the application of Section 468A
                     of the Code,  whether pursuant to an administrative  action
                     on the part of the Service or the  decision of any court of
                     competent  jurisdiction,  but in no event  earlier than the
                     date on  which  all  available  appeals  have  been  either
                     prosecuted  or abandoned  and the period of time for taking
                     any further appeals has elapsed; or

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                                        04/22/96/BSD/05043/003/AGREE-11//50628.2



                (2)  The  disposition  by the  Company  of any  interest  in the
                     Plants,  to  the  extent  provided  in  regulations  by the
                     Service promulgated under Code Section 468A.

         2.10 Distribution of Assets Upon  Termination.  Upon termination of any
one or more of the Fund(s),  the Trustee shall assist the Investment  Manager in
liquidating  the  assets  of  the  Fund(s),   and  thereupon   distributing  the
then-existing  assets  of  the  Fund(s)  (including  accrued,  accumulated,  and
undistributed net income) less final  administrative  expense (including accrued
taxes) to the Company.

         2.11 Alterations and Amendments. The Trustee and the Company understand
and agree that  modifications  or amendments  may be required to this  Agreement
from  time  to  time   consistent   with  the   purposes   of  this   Agreement.
Notwithstanding  anything herein to the contrary, no amendment which affects the
specific rights, duties, responsibilities,  or liabilities of the Trustee, shall
be made  without its consent and no amendment  shall be  effective  prior to the
Trustee receiving reasonable notice thereof. No amendment or modification to the
Agreement is permitted that would cause the assets of the Qualified  Funds to be
used in a  manner  contrary  to that  authorized  by Code  section  468A and the
regulations thereunder.

         2.12 No Authority to Conduct Business. The purpose of this Agreement is
limited to the matters set forth in Section 1.03 above, specifically,  and there
is no objective to carry on any business  unrelated to the purposes set forth in
Section 1.03 hereof, or to divide the gains therefrom.

                                       19

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2


                                       III

                                    TRUSTEES

         3.01 Designation and Qualification of Successor Trustee(s). The Company
by this  Agreement  has  appointed the Trustee named herein having all requisite
corporate power and authority to act as the sole Trustee.  The Trustee shall act
in accordance with the directions  provided to it by the Company under the terms
of this Agreement.  At any time during the term of this Trust, the Company shall
have the right to remove  the  Trustee  acting  hereunder  and  appoint  another
qualified  corporation,  pursuant to the requirements of the ANPP  Participation
Agreement, as a Successor Trustee upon sixty (60) days' notice in writing to the
Trustee, or upon such shorter notice as may be acceptable to the Trustee. In the
event that the Trustee or any Successor  Trustee shall:  (a) become insolvent or
admit in writing its insolvency; (b) be unable or admit in writing its inability
to pay its debts as such debts  mature;  (c) make a general  assignment  for the
benefit of  creditors;  (d) have an  involuntary  petition in  bankruptcy  filed
against it; (e) commence or otherwise seek to take advantage of any  bankruptcy,
reorganization,  insolvency,  readjustment  of debt,  dissolution or liquidation
law, statute,  or proceeding;  or (f) resign,  the Trustees or Successor Trustee
shall  cease to act as a  fiduciary  of the Funds  established  pursuant to this
Agreement and the Company shall appoint a Successor Trustee. In the event of any


                                       20

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2



such removal or  resignation,  the Trustee or Successor  Trustee  shall have the
right to have its  accounts  settled as provided  in Section  3.04  hereof.  Any
successor  to the  Company,  as  provided  herein,  shall have the same right to
remove and to appoint any Trustee or Successor Trustee.

         Any Successor Trustee shall qualify by a duly  acknowledged  acceptance
of  this  Master  Trust,  delivered  to the  Company.  Upon  acceptance  of such
appointment by the Successor Trustee, the Trustee shall assign, transfer and pay
over to such Successor  Trustee the monies and properties then  constituting the
Funds.  Any  Successor  Trustee  shall have all the rights,  powers,  duties and
obligation herein granted to the original Trustee.

         3.02  Resignation.  The  Trustee or any  Successor  Trustee  hereof may
resign and be relieved as Trustee at any time without  prior  application  to or
approval by or order of any court by a duly acknowledged instrument, which shall
be  delivered  to the Company by the Trustee not less than sixty (60) days prior
to the effective  date of the Trustee's  resignation or upon such shorter notice
as may be acceptable to the Company.

         3.03 Compensation. The Trustee shall be entitled to compensation as may
be agreed from time to time by the Company and the  Trustee.  Such  compensation
shall be payable by the Company, shall constitute administrative costs and shall
be reimbursable by the Master Trust.


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                                        04/22/96/BSD/05043/003/AGREE-11//50628.2



         3.04 Accounts.  The Trustee shall present  financial  statements to the
Company on a quarterly basis (within forty-five (45) days following the close of
each quarter), or at such other frequency as the Company shall from time to time
require.  The financial statements shall show the financial condition of each of
the Funds,  including,  without  limitation,  income and expenses of each of the
Funds for the period.  The Trustee  shall assume  responsibility  for  employing
independent  public  accountants  to audit  the  financial  statements  not less
frequently than annually,  subject to the provisions  contained in Section 5.05.
The  Company  shall  have the right to object  to any of the  Trustee's  audited
financial statements.  If the Company desires to object to the Trustee's audited
financial  statements it shall deliver notice of its objection to the Trustee in
writing  within one hundred and eighty (180) days from the day the Trustee shall
mail or deliver such audited financial  statements to the Company. If no written
objection is made within that time, the  presentation  of the audited  financial
statements  to the Company  shall release and discharge the Trustee with respect
to all acts or omissions; provided, however, that nothing contained herein shall
be deemed to relieve the Trustee of any liability which may be imposed  pursuant
to Section 3.06 hereof.

         3.05 Tax Returns and Other  Reports.  The Trustee and the Company shall
cooperate in the preparation of income or franchise tax returns or other reports
as may be required from time to time, including reports required pursuant to the
ANPP  Participation  Agreement,  and,  subject to the  limitations  contained in

                                       22

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2





Section 5.05, may employ  independent  certified public accountants or other tax
counsel to prepare or review such returns and reports. The Trustee shall present
to the  Company  on a  monthly  basis a report  setting  forth  all  investments
purchased by the Investment Manager(s) during the previous month.

         3.06 Liability.  The Trustee shall be liable for the acts, omissions or
defaults of its own officers and employees.  The Trustee shall not be liable for
the acts,  omissions  or defaults of its agents,  provided  any such agents were
selected with  reasonable  care and the  performance  and status of the agent is
monitored  with   reasonable   care   throughout  the  duration  of  the  agency
relationship.  The Trustee shall not be liable for the failure or default of any
bank or  depositary,  provided any such bank or  depositary  was  selected  with
reasonable  care and its  performance  and status is monitored  with  reasonable
care. Except where the Trustee  exercises its investment  discretion as provided
in this Agreement,  the Trustee shall not be liable for the acts or omissions of
any Investment Manager(s) acting hereunder.  Except as provided in Section 3.04,
the Trustee shall not be liable in regard to the exercise or  nonexercise of any
powers and  discretion  properly  delegated  pursuant to the  provisions of this
Agreement.

         Notwithstanding the foregoing,  the Trustee (and not the Funds), to the
extent of its investment  discretion  provided under Article VI, shall be liable
for any  consequences  resulting from investing assets of the Qualified Funds in
other than  permissible  assets or from  self-dealing as defined in Code section
468A(e)(5) and Treasury Regulations section 1.468A-5(b).

                                       23

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2




         The Trustee is prohibited  from doing any act or knowingly  engaging in
any transaction  that would violate the terms and conditions of any instructions
provided by written  Certificate  of the Company that are  consistent  with this
Agreement,  or contravening  any provision of this Agreement.  Upon receipt of a
Certificate of the Company giving the Trustee notice of either (a)  instructions
of the Company to the Trustee,  or (b) acts or transactions the Company believes
constitute a violation by the Trustee of the provisions of this  Agreement,  the
Trustee shall follow the  instructions  of the Company,  and/or cease and desist
from the acts  identified in the Certificate as violating the provisions of this
Agreement.  To the extent the Trustee  fails to follow the  instructions  of the
Company,  or continues with any act  identified in the  Certificate as violating
the provisions of this  Agreement,  from the date of receipt of the  Certificate
providing the instructions  and/or notice of violation of the provisions of this
Agreement,  the Trustee (and not any Fund) shall be liable for all  consequences
flowing from any failure to follow the Company's  instructions,  and/or  flowing
from  any  violation  by  the  Trustee  of the  provisions  of  this  Agreement.
Notwithstanding  the  foregoing,  the Trustee (and not any Fund) shall be liable
for all consequences flowing from any violation by the Trustee of the provisions
of this  Agreement,  regardless  of whether  notice  thereof was provided by the
Company.


                                       24

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2



         3.07  Indemnity of Trustee.  The Company hereby agrees to indemnify the
Trustee for,  and to hold it harmless  against,  any loss,  liability or expense
incurred without gross negligence, willful recklessness or bad faith on the part
of the Trustee,  arising out of or in  connection  with its  entering  into this
Agreement  and  carrying  out its  duties  hereunder,  including  the  costs and
expenses of defending itself against any claim of liability, provided such loss,
liability  or expense  does not result  from  self-dealing  under  Section  3.06
hereof, and provided further that no such costs or expenses shall be paid if the
payment of such costs or expenses is  prohibited  by section 468A of the Code or
regulations thereunder.

                                       IV

                                   INVESTMENTS

         4.01 Appointment of Investment Manager(s).  The Company may appoint one
or more  Investment  Managers  to direct  the  investment  of all or part of the
assets of the Funds.  The  Company  shall also have the right to remove any such
Investment Manager.  The appointment of the Investment  Manager(s) shall be made
in  accordance  with any procedure  specified by the Company.  The Company shall
provide  notice of any such  appointment by  Certification  to the Trustee which
shall  specify  the  portion of the Funds with  respect to which the  Investment
Manager(s)  has been  designated.  The  Investment  Manager(s)  shall certify in
writing to the Trustee  that it is  qualified  to act in the  capacity  provided
under the Investment  Manager  Agreement,  shall accept its  appointment as such

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                                        04/22/96/BSD/05043/003/AGREE-11//50628.2




Investment  Manager(s),  shall  certify  the  identity  of the person or persons
authorized  to give  instructions  or  directions  to the Trustee on its behalf,
including specimen signatures, and shall undertake to perform the duties imposed
on it under the Investment Manager  Agreement.  The Trustee may continue to rely
upon all such certifications unless otherwise notified in writing by the Company
or the Investment Manager(s), as the case may be.

         4.02 Direction by Investment Managers.  Notwithstanding Article VI, the
Investment  Manager(s)  designated  by the  Company to manage any portion of the
assets of the Funds shall have authority to manage,  acquire, and dispose of the
assets of the Funds,  or a portion  thereof  as the case may be. The  Investment
Manager(s) is authorized to invest in securities  specified in Section 6.02. The
Investment  Manager(s)  shall have the power and  authority,  exercisable in its
sole  discretion  at any time,  and from time to time, to issue and place orders
for the purchase or sale of portfolio securities directly with qualified brokers
or dealers.  The Trustee,  upon proper  notification from an Investment Manager,
shall  execute  and  deliver  in  accordance   with  the   appropriate   trading
authorizations.  Written notification of the issuance of each such authorization
shall be given  promptly to the Trustee by the  Investment  Manager(s),  and the
Investment Manager(s) shall cause the execution of such order to be confirmed in
writing  to the  Trustee by the broker or  dealer.  Such  notification  shall be
proper  authority  for the  Trustee to pay for  portfolio  securities  purchased
against receipt thereof and to deliver portfolio securities sold against payment
therefor, as the case may be.

                                       26

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2




         The authority of the Investment Manager(s) and the terms and conditions
of the  appointment  and  retention of the  Investment  Manager(s)  shall be the
responsibility  solely of the Company, and the Trustee shall not be deemed to be
a party to or to have any  obligations  under any agreement  with the Investment
Manager(s).  Any duty of supervision or review of the acts, omissions or overall
performance of the Investment Manager(s),  shall be the exclusive responsibility
of the Company,  and, except as provided in Section 3.06, the Trustee shall have
no duty to review any  securities  or other assets  purchased by the  Investment
Manager(s) or to the Company with respect to the exercise or  nonexercise of any
power by the Investment Manager(s).

         Unless the Trustee  participates  knowingly in, or knowingly undertakes
to conceal an act or omission of an  Investment  Manager(s)  knowing such act or
omission  to be a  breach  of the  fiduciary  responsibility  of the  Investment
Manager(s), the Trustee shall be under no liability of any kind which may result
by reason of any action  taken by it in  accordance  with any  direction  of the
Investment Manager(s). In any event, the Trustee shall be under no liability for
any loss of any kind by reason of changes in value of the investments purchased,
sold,  or  retained  by  the  Investment   Manager(s),   nor  for  the  risk  or
diversification of the portfolio,  nor for the turnover of the investments,  nor
for any other aspect of a portfolio for which an Investment  Manager(s) has been
appointed.


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                                        V

                            TRUSTEE'S GENERAL POWERS

         The  Trustee  Shall  have,  with  respect to the Funds,  the  following
powers,  all of which powers are fiduciary powers to be exercised in a fiduciary
capacity and in the best interests of the Funds and the  beneficiaries  thereof,
and which are to be exercised as the Trustee, acting in Such fiduciary capacity,
in its discretion, shall determine and, which, except as otherwise provided, are
intended in no way to limit the powers of the office, namely:

         5.01  Payment of Expenses of  Administration.  To pay all  ordinary and
necessary  expense and other  incidental  costs  including,  but not limited to,
Investment  Manager(s) fees and the fees and/or compensation of any professional
advisors, legal counsel or administrative support hired by the Company, expenses
and insurance policy premiums  incurred in connection with this Agreement or the
Funds  in the  discharge  of the  Trustee's  fiduciary  obligations  under  this
Agreement,  but only to the extent that such amount(s):  (1) may be incurred and
paid from the Funds without  causing the Funds to become  disqualified  from the
application of Section 468A of the Code or any applicable successor  provisions;
and (2) are permissible under the ANPP Participation Agreement.

         5.02 Extension of Obligations  and  Negotiation of Claims.  To renew or
extend the time of payment of any obligation,  secured or unsecured,  payable to
or by this  Trust,  for as long a period or periods of time and on such terms as
the Trustee shall determine, and to adjust, settle,  compromise,  and arbitrate

                                       28

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2




claims or demands in favor of or against this Trust, including claims for taxes,
upon such terms as the Trustee may deem  advisable,  subject to the  limitations
contained in Section 6.03 (regarding self-dealing), and the procedures contained
in Section 2.01.

         5.03 Registration of Securities. To hold any stocks, bonds, securities,
and/or other  property in the name of a nominee,  in a street name,  or by other
title-holding device, without indication of trust.

         5.04 Location of Assets. To keep any property  belonging to any Fund at
any place in the United States.

         5.05 Retention of Professional  Services.  To execute any of the powers
hereof and  perform  the  duties  required  of it  hereunder  by or through  its
employees, agents, attorneys, contractors or receivers.

         5.06  Delegation of  Ministerial  Powers.  To delegate to other persons
such ministerial powers and duties as the Trustee may deem to be advisable.

         5.07  Powers of  Trustee  to  Continue  Until  Final  Distribution.  To
exercise any of such powers after the date on which the  principal and income of
the Funds  shall  have  become  distributable  and until such time as the entire
principal of, and income from, the Funds shall have been actually distributed by
the Trustee.  It is intended that  distribution  of the assets of the Funds will
occur as soon as possible upon termination of the Agreement,  subject,  however,
to the limitations contained in Sections 2.08, 2.09 and 2.10 hereof.

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                                        04/22/96/BSD/05043/003/AGREE-11//50628.2



         5.08  Voting.  To vote in person or by proxy  (at the  direction  of an
Investment  Manager  to the extent an asset is being  managed  by an  Investment
Manager) any stocks, bonds or other securities held by the Funds.

         5.09  Power to Join in or  Dissent  From  Certain  Events.  To join in,
dissent or oppose the reorganization,  recapitalization,  consolidation, sale or
merger of corporations  or properties in which the Funds may hold stocks,  bonds
or other securities or in which the Funds may be interested, upon such terms and
conditions as deemed wise; to pay any assessments or subscriptions in connection
therewith, and to accept any securities or property,  whether or not the Trustee
would be  authorized  to invest in such  securities  or  property,  which may be
issued upon any such reorganization,  recapitalization,  consolidation,  sale or
merger and thereafter to hold the same, without any duty to sell.

         5.10  Prohibition  Against  Real  Estate  Investment.   Notwithstanding
anything else in this Agreement to the contrary,  including, without limitation,
any  specific  or  general  power  granted  to the  Trustee  and the  Investment
Manager(s),  no portion  of the Funds  shall be  invested  in real  estate.  For


                                       30

                                        04/22/96/BSD/05043/003/AGREE-11//50628.2





purposes of this section 5.10,  "real estate"  includes,  but is not limited to,
real property, leaseholds or mineral interests.

         5.11  Discretion  in Exercise  of Powers.  To do any and all other acts
which the  Trustee  shall deem  proper to  effectuate  the  powers  specifically
conferred upon it by this  Agreement,  provided,  however,  that the Trustee may
not, in its discretionary  exercise of powers, do any act or knowingly engage in
any transaction which would:

                (1)  Disqualify  the  Qualified  Funds from the  application  of
                     Section 468A (or any applicable successor provision) of the
                     Code; or

                (2)  Contravene any provision of this Agreement; or

                (3)  Violate any terms or conditions of applicable law.

                                       VI

                           TRUSTEE'S INVESTMENT POWERS

         The Trustee  recognizes the authority of the  Investment  Manager(s) to
manage,  invest, and reinvest the assets of the Funds pursuant to the Investment
Manager  Agreement  and as provided in Section 4.02 of this  Agreement,  and the
Trustee agrees to cooperate with the Investment  Manager(s) as deemed  necessary
to accomplish these tasks;  provided,  however, that to the extent an Investment
Manager is not otherwise appointed by the Company, or to the extent that an 

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                                        04/22/96/BSD/05043/003/AGREE-11//50628.2




Investment  Manager has not invested  Fund monies,  the Trustee shall act in the
capacity of the  Investment  Manager as provided in Article IV. Upon the written
authorization  of the  Company  from time to time,  the  Trustee  shall have the
following investment powers, all of which are fiduciary powers to be executed in
a fiduciary capacity and in the best interest of the Funds and the beneficiaries
thereof, and which are to be exercised by the Trustee,  acting in such fiduciary
capacity, in its discretion,  shall determine and, except as otherwise provided,
which are intended in no way to limit the powers of the office, namely:

         6.01  Investment  Standards.  The Trustee in its exercise of investment
discretion  as  authorized  by the Company and  consistent  with any  investment
standards  of the  NMPUC,  any other  relevant  regulatory  agency  and the ANPP
Participation Agreement, shall hold, manage, and invest the assets of the Funds,
except as provided in Section 6.02;

         6.02  Investment  of Funds.  To invest and  reinvest all or part of the
Funds, including any undistributed income therefrom;  provided, however, that no
such  investment or  reinvestment  of the Funds may be made by the Trustee which
would  contravene  any  instructions  issued by the  Company  or any  applicable
investment  standards.  In all  cases,  however,  the total  investments  by the
Trustee  must be  sufficiently  liquid to enable the Master Trust to fulfill the
purposes of the Master Trust and to satisfy  obligations  of the Master Trust as
such obligations  become due. Nothing in this Section 6.02 shall be construed as
authorizing  the  Trustee  to carry  on any  business  or to  divide  the  gains
therefrom.

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                                        04/22/96/BSD/05043/003/AGREE-11//50628.2



         6.03  Management  of Master Trust.  To sell,  exchange,  partition,  or
otherwise  dispose of all or any part of the  Master  Trust at public or private
sale,  without prior application to, or approval by, or order of any court, upon
such terms and in such manner and at such prices as the Trustee shall determine;
to modify,  renew or extend bonds, notes or other obligations or any installment
of  principal  thereof or any  interest due thereon and to waive any defaults in
the performance of the terms and conditions thereof;  and to execute and deliver
any and all bills of sale, assignments, bonds or other instruments in connection
with these  powers,  all at such  times,  in such manner and upon such terms and
conditions as the Trustee may deem  expedient to accomplish the purposes of this
Master Trust as set forth in Section 1.03.

         Notwithstanding  anything  contained in this Agreement to the contrary,
the  Trustee  may not  authorize  or  carry  out any  sale,  exchange  or  other
transaction which would constitute an act of  "self-dealing"  within the meaning
of Section 4951 of the Code, as such section is made applicable to the Qualified
Funds by Section  468A(e)(5) of the Code, any  regulations  thereunder,  and any
applicable successor provision.

         6.04  Disposition  of  Investments.  When required to make any payments
under  Section  2.01 or 5.01  hereof,  from  monies  over which the  Trustee has
discretion, the Trustee shall sell investments at the best price reasonably

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                                       04/22/96/BSD/05043/003/AGREE-11//50628.2





obtainable,  or  present  investments  for  prepayment,  but only  upon  written
direction from the Company. The Trustee shall have no liability,  except for its
own negligence or willful misconduct,  with respect to any sale or prepayment of
an  investment  directed by the Company or an  Investment  Manager or made by an
Investment Manager through a broker-dealer.

         6.05  Power  to Hold  Uninvested  Cash.  To hold  uninvested  cash in a
commercial  bank of the  Trustee  or  that of an  affiliate,  as it  shall  deem
necessary.

         6.06 Cash  Sweep  Provision.  To invest  in any  collective,  common or
pooled trust fund operated or maintained  exclusively for the commingling of and
collective  investment  of  monies  or other  assets  including  any such  funds
operated or maintained by the Trustee or an affiliate.

                                       VII

                                  MISCELLANEOUS

         7.01 Headings. The section headings set forth in this Agreement and the
Table of Contents are inserted for  convenience  of reference  only and shall be
disregarded in the  construction or  interpretation  of any of the provisions of
this Agreement.

         7.02 Particular Words. Any word contained in the text of this Agreement
shall be read as the  singular  or plural  and as the  masculine,  feminine,  or
neuter as may be applicable or  permissible in the  particular  context.  Unless
otherwise  specifically  stated,  the word  "person"  shall be taken to mean and
include an individual, partnership, association, trust, company, or corporation.

                                       34
                                                                  
                                        04/22/96/BSD/05043/003/AGREE-11//50628.2




         7.03 Parties  Interested  Herein.  Nothing expressed or implied in this
Agreement is intended or shall be  construed to confer upon,  or to give to, any
person or corporation,  other than the Company and the Trustee any right, remedy
or claim under or by reason of this  Agreement,  or any  covenant,  condition or
stipulation  contained herein. The Company shall be entitled to receive payments
for  Decommissioning  Costs and  administrative  expenses of the Funds which the
Company may incur in carrying out the purposes set forth in Section 1.03 of this
Agreement.

         7.04 Severability of Provisions.  If any provision of this Agreement or
its application to any person or entity or in any circumstances shall be invalid
and  unenforceable,  the  application  of  such  provision  to  persons  and  in
circumstances  other than those as to which it is invalid or  unenforceable  and
the other provisions of this Agreement, shall not be affected by such invalidity
or unenforceability.

         7.05  Form and  Content  of  Communications.  The  names of any  person
authorized to act on behalf of the Company shall be certified, with the specimen
signature  of such  person,  to the  Trustee by the  Company.  Until it receives
appropriate  written  evidence  to the  contrary,  the  Trustee  shall  be fully
protected in relying upon or acting in accordance with any written notice,

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                                        04/22/96/BSD/05043/003/AGREE-11//50628.2




instruction, direction, certificate, resolution, or other communication believed
by it to be genuine and to be signed and/or certified by any proper person,  and
the Trustee  shall be under no duty to make any  investigation  or inquiry as to
the truth or accuracy of any  statement  contained  therein.  Until  notified in
writing to the  contrary,  the Trustee shall have the right to assume that there
has been no  change  in the  identity  or  authority  of any  person  previously
certified to it hereunder.

         7.06 Delivery of Notices Under  Agreement.  Any notice required by this
Agreement to be given to the Company or the Trustee shall be deemed to have been
properly given when mailed, postage prepaid, by registered or certified mail, to
the person to be notified as set forth below:

If to the Company:

PUBLIC SERVICE  COMPANY OF NEW MEXICO Alvarado  Square  Albuquerque,  New Mexico
87158

Attention:  Robert G. McMahon

If to the Trustee:

Mellon Bank, N.A.
One Mellon Bank Center
Pittsburgh, Pennsylvania  15258-0001

Attention:  Denise A. Fuhrer

The Company or the Trustee may change that address by delivering  notice thereof
in writing to the other party.

         7.07 Successors and Assigns. Subject to the provisions of Sections 2.07
and 3.01,  this Agreement  shall be binding upon and inure to the benefit of the
Company,  the  Trustee  and  their  respective  successors,   assigns,  personal
representatives, executors and heirs.


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         7.08 Governing Jurisdiction.  Each Fund is a Pennsylvania trust and all
questions pertaining to its validity,  construction, and administration shall be
determined in accordance  with the laws of the  Commonwealth  of Pennsylvania to
the extent not preempted by Federal law.

         7.09  Accounting  Year.  Each Fund shall operate on an accounting  year
which coincides with the calendar year, January 1 through December 31.

         7.10  Counterparts.  This  Agreement  may be  executed in any number of
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

         7.11  Disbursement  Withdrawal   Certificate.   No  provision  of  this
Agreement  shall be construed or applied so as to require the  preparation  of a
Disbursement Certificate or a Withdrawal Certificate to authorize the payment of
compensation   to  the  Trustee  under  Section  3.03  or  of  the  expenses  of
administration under Section 5.01.

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         IN WITNESS  WHEREOF,  the Company and the Trustee  have set their hands
and seals to this Agreement as of the day and year first above written.

                                         PUBLIC SERVICE COMPANY OF NEW MEXICO



                                         By: ________________________________
                                                             Title

                                         Attest: ____________________________
                                                             Title



                                         MELLON BANK, N.A.



                                         By: ________________________________
                                                             Title

                                         Attest: ____________________________
                                                             Title


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                                                                      Exhibit A

                            DISBURSEMENT CERTIFICATE


                The  undersigned,  being  Authorized  Representatives  of Public
Service Company of New Mexico  ("Company"),  a New Mexico  corporation,  and, in
such  capacity,  being  authorized  and  empowered  to execute and deliver  this
certificate,  hereby  certify to the  Trustee  pursuant  to Section  2.01 of the
Public Service Company of New Mexico Master  Decommissioning Trust Agreement for
Palo Verde Nuclear Generating Station ("Palo Verde"), dated March ___, 1995:

                (1)  there  is due and  owing  to each  payee  ("Payee")  [all/a
                     portion] of the  invoiced  cost to the Company for goods or
                     services provided in connection with the decommissioning of
                     Unit  [One/Two/Three]  of Palo  Verde as  evidenced  by the
                     Invoice  Schedule (with  supporting  exhibits)  attached as
                     Exhibit 1 hereto;

                (2)  all such  amounts  due and owing to the  Payees  constitute
                     Decommissioning Costs; and

                (3)  all conditions  precedent to the making of this  withdrawal
                     and  disbursement  set forth in any agreement  between such
                     Payee and the Company have been fulfilled.

                Accordingly,  you are hereby authorized to withdraw  $__________
from  the  [Palo   Verde  Unit   1/Palo   Verde  Unit   2/Palo   Verde  Unit  3]
[Qualified/Nonqualified]  Fund in order to permit payment of such sum to be made
to Payees for such  purpose.  You are further  authorized  to disburse such sum,
once  withdrawn,  directly to such Payees in the  following  manner:  [DESCRIBE:
JOINT PAYEE CHECK, WIRE TRANSFER, ETC.] on or before , 19__.

                Executed this       day of           , 19__.



                                          By:
                                          --------------------------------
                                               Authorized Representative



                                          --------------------------------
                                               Authorized Representative

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                                                                      Exhibit B

                             WITHDRAWAL CERTIFICATE


                The  undersigned,  being  Authorized  Representatives  of Public
Service Company of New Mexico ("Company"), a New Mexico corporation, and in such
capacity,  being duly  authorized  and  empowered  to execute and  deliver  this
certificate,  hereby  certify to the  Trustee  pursuant  to Section  2.01 of the
Public Service Company of New Mexico Master  Decommissioning Trust Agreement for
Palo Verde Nuclear Generating Station dated March __, 1995:

                (1)  there is due and owing to the  Company  [all/a  portion] of
                     the  invoiced  cost to the  Company  for goods or  services
                     provided in  connection  with the  decommissioning  of Palo
                     Verde as evidenced by the Invoice  Schedule with supporting
                     exhibits attached as Exhibit 1 hereto;

                (2)  all  such  amounts  have  been  paid  by  the  Company  and
                     constitute Decommissioning Costs; and

                (3)  all conditions  precedent to the making of this  withdrawal
                     and  disbursement  and the  payment  by the  Company of the
                     Decommissioning  Costs set forth in any  agreement  between
                     such  payee of the  Companies  and the  Company  have  been
                     fulfilled.

                Accordingly,  you are hereby authorized to withdraw  $__________
from  the  [Palo   Verde  Unit   1/Palo   Verde  Unit   2/Palo   Verde  Unit  3]
[Qualified/Nonqualified]  Fund in order to permit payment of such sum to be made
to the Company for such  purpose.  You are further  authorized  to disburse such
sum, once withdrawn, directly to such Payees in the following manner: [DESCRIBE:
JOINT PAYEE CHECK, WIRE TRANSFER, ETC.] on or before , 19__.

                Executed this       day of           , 19__.



                                       By:
                                       --------------------------------
                                             Authorized Representative



                                       ---------------------------------
                                             Authorized Representative



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