EXHIBIT 10.3


          This Amendment No. 2, dated as of November 1, 1994, to the Amended and
Restated Decommissioning Trust Agreement (PVNGS Unit 2), dated as of January 31,
1992,  as amended by Amendment  No. 1 thereto  dated as of November 1, 1992 (the
"Decommissioning  Trust Agreement";  terms used herein as therein  defined),  is
entered into between Arizona Public Service Company ("APS"),  The First National
Bank of Boston,  as Owner  Trustee  and as Lessor,  and Mellon  Bank,  N.A.,  as
Decommissioning Trustee ("Decommissioning Trustee").

                             R E C I T A L S:

          WHEREAS,  the parties hereto wish to amend the  investment  parameters
for the Decommissioning Trust Fund and the Second Fund contained in Exhibits B-1
and B-2 to the Decommissioning Trust Agreement;

          NOW, THEREFORE, in consideration of the premises and of other good and
valuable   consideration,   receipt   and   sufficiency   of  which  are  hereby
acknowledged, the parties hereto agree as follows:

                           A G R E E M E N T S:

          SECTION 1. Amendments.

          (a) Section  9(a) of the  Decommissioning  Trust  Agreement  is hereby
amended by replacing the words "Exhibits B-1 and B-2, respectively" therein with
the words "Exhibit B."

          (b) The definition of the term "Permitted Investments" in Exhibit A to
the  Decommissioning  Trust  Agreement is hereby  amended by replacing the words
"Exhibits B-1 and B-2 hereto, respectively" with the words "Exhibit B."

          (c) Exhibits B-1 and B-2 to the  Decommissioning  Trust  Agreement are
hereby deleted and are replaced in their entirety by Exhibit B hereto.

          SECTION 2.  Effectiveness.

          This Amendment No. 2 shall become effective as of the date hereof upon
the execution and delivery of a counterpart  of this  Amendment No. 2 by each of
the parties hereto.

          SECTION 3.  Miscellaneous

          (a)  Full Force and Effect.

          Except  as  expressly  provided  herein,  the  Decommissioning   Trust
Agreement shall remain unchanged and in full force and effect. Each reference in
the  Decommissioning  Trust Agreement and in any exhibit or schedule  thereto to
"this Agreement," "hereto," "hereof" and terms of similar import shall be deemed
to refer to the Decommissioning Trust Agreement as amended hereby.

          (b)  Counterparts.

          This  Amendment  No. 2 may be executed in any number of  counterparts,
all of which taken together shall  constitute one and the same  instrument,  and
any of the parties  hereto may execute this  Amendment No. 2 by signing any such
counterpart.

          (c)  Arizona Law.

          This  Amendment  No.  2 shall  be  construed  in  accordance  with and
governed by the law of the State of Arizona.

          IN WITNESS WHEREOF,  the parties hereto have caused this Amendment No.
2 to the  Decommissioning  Trust Agreement to be duly executed as of the day and
year first above written.

                              ARIZONA PUBLIC SERVICE COMPANY



                   By    Nancy E. Newquist
                         ----------------------------------
                  Title  Treasurer
                         ----------------------------------


                              MELLON BANK N.A., as
                              Decommissioning Trustee



                   By    Earl Kleckner
                         ----------------------------------
                  Title  Vice President
                         ----------------------------------


                              THE  FIRST  NATIONAL  BANK  OF  BOSTON,  as  Owner
                                   Trustee under a Trust Agreement with Security
                                   Pacific  Capital  Leasing  Corporation and as
                                   Lessor  under a Facility  Lease with  Arizona
                                   Public Service Company



                   By    Donna Germano
                         ----------------------------------
                  Title  Account Manager
                         ----------------------------------


                              THE FIRST NATIONAL BANK OF BOSTON,
                                   as Owner Trustee under a Trust Agreement
                                   with Emerson Finance Co. and as Lessor
                                   under a Facility Lease with Arizona Public
                                   Service Company



                   By    Donna Germano
                         ----------------------------------
                  Title  Account Manager
                         ----------------------------------


STATE OF ARIZONA    )
                    )  ss.
County of Maricopa  )

          The foregoing  instrument was acknowledged  before me this 17th day of
November,  1994, by Nancy E.  Newquist,  the Treasurer of ARIZONA PUBLIC SERVICE
COMPANY, an Arizona corporation, on behalf of said corporation.

                              Maria R. Marrs
                              ------------------------------------------
                              Notary Public

My commission expires:

July 21, 1998
---------------------



STATE OF Pennsylvania    )
                         )  ss.
County of Allegheny      )

          The foregoing  instrument was acknowledged  before me this 23rd day of
November,  1994,  by Earl  Kleckner,  a Trust  Officer of MELLON  BANK,  N.A., a
corporation having trust powers, as Decommissioning  Trustee,  on behalf of said
corporation.


                              Denise A. Fuhrer
                              ------------------------------------------
                              Notary Public

My commission expires:

Notarial Seal
Denise A. Fuhrer, Notary Public
Pittsburgh, Allegheny County
My Commission Expires December 3, 1998
Member, Pennsylvania Association of Notaries
--------------------------------------------



STATE OF Massachusetts   )
                         )  ss.
County of Suffolk        )

          The foregoing  instrument was acknowledged  before me this 22nd day of
November, 1994, by Donna Germano, the Account Manager of THE FIRST NATIONAL BANK
OF BOSTON,  a national  banking  association,  in its capacity as Owner  Trustee
under a Trust Agreement with Security Pacific Capital Leasing  Corporation,  and
as Lessor under a Facility Lease with Arizona Public Service Company,  on behalf
of said association in such capacities.


                              Shawn P. George
                              ------------------------------------------
                              Notary Public

My commission expires:

September 2, 1999
---------------------





STATE OF ___________________  )
                              )  ss.
County of __________________  )

          The foregoing  instrument was acknowledged  before me this ____ day of
______________,  1994, by  ______________________,  the _____________________ of
THE FIRST  NATIONAL  BANK OF BOSTON,  a  national  banking  association,  in its
capacity as Owner Trustee under a Trust  Agreement with Emerson Finance Co., and
as Lessor under a Facility Lease with Arizona Public Service Company,  on behalf
of said association in such capacities.



                              ------------------------------------------
                              Notary Public

My commission expires:

---------------------


                                 Exhibit B

                       PERMITTED INVESTMENTS FOR THE
              DECOMMISSIONING TRUST FUND AND THE SECOND FUND


          The Second Fund must meet all applicable requirements of the Code, and
applicable  rules and  regulations  promulgated by the Internal  Revenue Service
with respect to a Nuclear Decommissioning Reserve Fund.

          Subject  to the  foregoing,  the  Decommissioning  Trust  Fund and the
Second  Fund  may  invest  in any of the  following  obligations  or  securities
maturing  at such time or times as to enable  payments or  transfers  to be made
from the Funds or which shall be readily  marketable prior to the final maturity
thereof:

          (a)  bills,  notes,  bonds  and  savings  bonds of the Treasury of the
               United States of America;

          (b)  obligations  of the United  States of  America  not  included  in
               clause (a) taken into  consideration  for purposes of determining
               the public debt limit of the United States of America;

          (c)  time or demand  deposits  in a bank (as defined in Section 581 of
               the Code) or an  insured  credit  union  (within  the  meaning of
               Section 101(6) of the Federal Credit Union Act, 12 U.S.C. 1752(7)
               (1982))  (for the  purposes  of this  paragraph,  "time or demand
               deposits"  shall include  checking  accounts,  savings  accounts,
               certificates  of deposit,  and other time or demand  deposits but
               shall not include common or collective trust funds);

          (d)  obligations  of  the  Federal  National  Mortgage Association and
               Government National Mortgage Association;

          (e)  AAA  rated  collateralized  mortgage  obligations; interest only,
               principal only, and inverse floaters are specifically prohibited;

          (f)  commercial  paper  maturing  within 60 days and rated the highest
               grade by Moody's Investors Services, Inc. ("Moody's") or Standard
               & Poor's  Corporation  ("S & P"), or if one of such agencies does
               not rate such paper, rated the highest grade by the other;

          (g)  deposit  accounts  (which may be represented by  certificates  of
               deposit)  payable  on  demand or  maturing  within  180 days,  in
               Federally insured national or state banks; provided,  however, if
               the  aggregate  amount  of  such  deposit  accounts  in a bank is
               $100,000  or more,  such bank shall  have  combined  capital  and
               surplus as of its last report of condition exceeding $250,000,000
               and a senior unsecured debt rating of Investment Grade;

          (h)  the Decommissioning Trustee's Short Term Investment Fund ("STIF")
               account;  provided,  however,  that no more than fifteen  percent
               (15%) of the aggregate assets of the Funds may be invested in the
               Decommissioning  Trustee's  STIF account at any one time,  except
               that the full amount of APS' quarterly  contribution to the Funds
               or any portion  thereof  may be  invested in the  Decommissioning
               Trustee's  STIF  account for a period of up to seven (7) business
               days after such contribution is made and, during such period, the
               amount of such  contribution  or portion  thereof that shall have
               been so invested  shall not count  against  the  fifteen  percent
               (15%) limitation in this paragraph (h);

          (i)  repurchase agreements fully secured (and perfected) by any of the
               foregoing  obligations or securities maturing within 30 days with
               any  Federally   insured   national  or  state  bank   (including
               Decommissioning  Trustee) or any other financial institution that
               is a  nationally  recognized  dealer  that  reports to the Market
               Reports  Division  of the  Federal  Reserve  Bank  of  New  York;
               provided,   however,   if  the  aggregate  face  amount  of  such
               repurchase  agreements  with an issuer is $1,000,000 or more, the
               issuer  shall have  combined  capital  and surplus as of its last
               report of condition exceeding $250,000,000 and a senior unsecured
               debt rating of Investment Grade;

          (j)  obligations  rated  Investment  Grade of a State, a possession of
               the United  States of  America,  the  District of Columbia or any
               political subdivision of the foregoing,  the interest on which is
               exempt from tax under Section 103(a) of the Code;

          (k)  corporate debt obligations rated Investment Grade; and

          (l)  (x) corporate equity securities,  including,  but not limited to,
               investment in units of common or collective trust funds investing
               in corporate equity  securities;  including,  but not limited to,
               the  Decommissioning   Trustee's  Nuclear  Decommissioning  Trust
               Equity   Index  Fund  (the  "NDT  Equity  Index  Fund")  and  (y)
               obligations  not  included  in clauses  (a) through (k) issued or
               guaranteed by a person  controlled or supervised by and acting as
               an  instrumentality  of the United States of America  pursuant to
               authority  granted  by the  Congress  of  the  United  States  of
               America,  including Federal  Intermediate  Credit Bank, Banks for
               Cooperatives,  Federal  Land  Banks,  Federal  Home  Loan  Banks,
               Federal Home Loan Mortgage  Corporation;  provided,  that no more
               than forty percent (40%) of the aggregate assets of the Funds may
               be  invested  in  securities  described  in (x)  and  (y) of this
               subparagraph  (l) during the period from January 31, 1992 through
               January 31, 1998,  no more than thirty  percent  (30%) during the
               period from  February 1, 1998 through  January 31,  2004,  and no
               more than fifteen  percent  (15%) during the period from February
               1, 2004 through January 31, 2010, and provided further that after
               January  31,  2010,  no   investments   shall  be  made  in  such
               securities.

          Notwithstanding the foregoing,  the following  restrictions are placed
on the investment of the assets of the Funds:

          1.   Securities of APS, APS' parent corporation, Pinnacle West Capital
Corporation, or its affiliates, are not permitted.

          2.   Securities  issued by Maricopa County,  Arizona Pollution Control
Corporation in connection  with the financing of certain  facilities at the Palo
Verde Nuclear Generation Station are not permitted.

          3.   Securities  issued by or on behalf of any participant in the Palo
Verde Nuclear Generating Station are not permitted.

          4.  There  shall  be no  short-selling,  securities  lending,  options
trading, financial futures,  over-the-counter derivative transactions,  or other
specialized  investment  activity,  except as specifically allowed in paragraphs
(a) through (l) hereof,  or except as may be effected in the ordinary  course of
operation of the Decommissioning  Trustee's STIF account or its NDT Equity Index
Fund.

          5.  No investment  shall be made which  would cause the holding of any
one issue (excluding obligations of the United States Government and agencies of
or guaranteed by the United States Government and excluding units of a common or
collective trust fund), to exceed ten percent (10%) of the aggregate assets held
under this Decommissioning Trust Agreement,  the Unit 1 Trust Agreement, and the
Unit 3 Trust Agreement, valued at cost.

          6. Bank certificates of deposit must be at banks with a minimum of one
billion  ($1,000,000,000)  in assets as of such  banks'  most  recent  report of
condition.

          7.  Short-term   taxable  and  non-taxable  debt  securities  are  not
permitted  unless such securities have a rating of at least P-1 by Moody's or at
least A-1 by S & P.

          8. Long-term taxable and non-taxable debt securities are not permitted
unless such securities have a rating of at least "A" by Moody's or S&P.

          9. No  investment  shall be made which would cause sixty percent (60%)
or more of the aggregate assets held under this Decommissioning  Trust Agreement
and the Unit 1 Trust  Agreement and the Unit 3 Trust Agreement to be invested in
equity securities.