BEFORE THE ARIZONA CORPORATION COMMISSION

CARL J. KUNASEK
         CHAIRMAN
JIM IRVIN
         COMMISSIONER
WILLIAM A. MUNDELL
         COMMISSIONER

IN THE MATTER OF THE APPLICATION OF              DOCKET NO. E-01345A-98-0473
ARIZONA PUBLIC SERVICE COMPANY FOR
APPROVAL OF ITS PLAN FOR STRANDED
COST RECOVERY.
- --------------------------------------------

IN THE MATTER OF THE FILING OF ARIZONA           DOCKET NO. E-01345A-97-0773
PUBLIC SERVICE COMPANY OF UNBUNDLED
TARIFFS PURSUANT TO A.A.C. R14-2-1601 ET
SEQ.

- --------------------------------------------
IN THE MATTER OF COMPETITION IN THE              DOCKET NO. RE-00000C-94-0165
PROVISION OF ELECTRIC SERVICES                   DECISION NO. ______________
THROUGHOUT THE STATE OF ARIZONA.
                                                 OPINION AND ORDER
                                                 -----------------
- --------------------------------------------

DATES OF HEARING:         July 12, 1999 (pre-hearing  conference),  July 14, 15,
                          16, 19, 20, and 21, 1999

PLACE OF HEARING:         Phoenix, Arizona

PRESIDING OFFICER:        Jerry L. Rudibaugh

IN ATTENDANCE:            Carl J. Kunasek, Chairman
                          Jim Irvin, Commissioner

APPEARANCES:              Mr.  Steven  M.  Wheeler,  Mr.  Thomas  Mumaw  and Mr.
                          Jeffrey B. Guldner,  SNELL & WILMER, LLP, on behalf of
                          Arizona Public Service Company;

                          Mr. C. Webb  Crockett and Mr. Jay  Shapiro,  FENNEMORE
                          CRAIG, on behalf of Cyprus Climax Metals, Co., ASARCO,
                          Inc., and Arizonans for Electric Choice & Competition;

                          Mr. Scott S. Wakefield,  Chief Counsel,  and Ms. Karen
                          Nally on behalf of the  Residential  Utility  Consumer
                          Office;

                          Ms.  Betty  Pruitt on behalf of the Arizona  Community
                          Action Association;

                          Mr.  Timothy Hogan on behalf of the Arizona  Consumers
                          Council;

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                                              DOCKET NO. E-01345A-98-0473 ET AL.

                          Mr.   Robert  S.  Lynch  on  behalf  of  the   Arizona
                          Transmission Dependent Utility Group;

                          Mr.  Walter W. Meek on behalf of the  Arizona  Utility
                          Investors Association;

                          Mr.  Douglas C. Nelson,  DOUGLAS C. NELSON,  P.C.,  on
                          behalf of Commonwealth Energy Corporation;

                          Mr. Lawrence V. Robertson, Jr., MUNGER & CHADWICK, and
                          Ms.  Leslie  Lawner,  Director  Government  Affairs on
                          behalf  of Enron  Corporation,  and Mr.  Robertson  on
                          behalf of PG&E Energy Services;

                          Mr. Lex J.  Smith,  BROWN & BAIN,  P.A.,  on behalf of
                          Illinova Energy Partners and Sempra Energy Trading;

                          Mr.  Randall  H.  Werner,  ROSHKA,  HEYMAN  &  DeWULF,
                          P.L.C., on behalf of NEV Southwest;

                          Mr. Norman  Furuta on behalf of the  Department of the
                          Navy;

                          Mr.  Bradley S.  Carroll on behalf of Tucson  Electric
                          Power Company; and

                          Mr.  Christopher C. Kempley,  Assistant  Chief Counsel
                          and  Ms.  Janet  F.  Wagner,  Staff  Attorney,   Legal
                          Division  on behalf of the  Utilities  Division of the
                          Arizona Corporation Commission.

BY THE COMMISSION:

         On December 26, 1996, the Arizona Corporation Commission ("Commission")
in Decision No. 59943 enacted A.A.C.  R14-2-1601 through R14-2-1616  ("Rules" or
"Electric Competition Rules").

         On June 22,  1998,  the  Commission  issued  Decision  No.  60977,  the
Stranded  Cost Order which  required  each  Affected  Utility to file a plan for
stranded cost recovery.

         On August 10, 1998, the Commission issued Decision No. 61071 which made
modifications to the Rules on an emergency basis.

         On August 21, 1998,  Arizona Public Service  Company  ("APS") filed its
Stranded Costs filing.

         On  November 5, 1998,  APS filed a  Settlement  Proposal  that had been
entered into with the Commission's  Utilities  Division Staff ("Staff Settlement
Proposal").  Our November 24, 1998 Procedural  Order set the matter for hearing.

                                       2

                                              DOCKET NO. E-01345A-98-0473 ET AL.

On November 25, 1998, the Commission issued Decision No. 61259 which established
an  expedited   procedural  schedule  for  evidentiary  hearings  on  the  Staff
Settlement Proposal.

         On  November  30,  1998,  the Arizona  Attorney  General's  Office,  in
association with numerous other parties,  filed a Verified  Petition for Special
Action and Writ of Mandamus with the Arizona Supreme Court  ("Court")  regarding
the  Commission's  November 25, 1998 Procedural  Order,  Decision No. 61259. The
Attorney  General sought a Stay of the  Commission's  consideration of the Staff
Settlement Proposal with APS and Tucson Electric Power Company ("TEP").

         On  December 1, 1998,  Vice Chief  Justice  Charles J. Jones  granted a
Motion for Immediate  Stay of the  Procedural  Order.  On December 9, 1998,  the
Commission Staff filed a notice with the Supreme Court that the Staff Settlement
Proposal had been withdrawn from Commission consideration.

         On April 27, 1999,  the  Commission  issued  Decision No. 61677,  which
modified  Decision No. 60977.  On May 17, 1999,  APS filed with the Commission a
Notice of Filing, Application for Approval of Settlement Agreement ("Settlement"
or "Agreement") (1) and Request for Procedural Order.

         Our May 25, 1999 Procedural Order set the matter for hearing commencing
on July 14, 1999.

         This  matter  came  before a duly  authorized  Hearing  Officer  of the
Commission at its offices in Phoenix,  Arizona.  APS, Cyprus Climax Metals, Co.,
ASARCO, Inc., Arizonans for Electric Choice & Competition ("AECC"),  Residential
Utility  Consumer Office  ("RUCO"),  the Arizona  Community  Action  Association
("ACAA"),  the Arizona Consumers  Council,  the Arizona  Transmission  Dependent
Utility Group, the Arizona Utility  Investors  Association,  Enron  Corporation,
PG&E Energy  Services,  Illinova Energy  Partners,  Sempra Energy  Trading,  NEV
Southwest,  the Department of the Navy, Tucson Electric Power Company, and Staff

- --------
(1) The  Parties to the  Proposed  Settlement  are as follows:  the  Residential
Utility  Consumer  Office,  Arizona Public Service  Company,  Arizona  Community
Action  Association and the Arizonans for Electric Choice and Competition  which
is a coalition of companies  and  associations  in support of  competition  that
includes  Cable Systems  International,  BHP Copper,  Motorola,  Chemical  Lime,
Intel,  Honeywell,  Allied Signal,  Cyprus Climax Metals,  Asarco, Phelps Dodge,
Homebuilders  of Central  Arizona,  Arizona  Mining  Industry  Gets Our Support,
Arizona Food Marketing  Alliance,  Arizona  Association  of Industries,  Arizona
Multi-housing Association, Arizona Rock Products Association, Arizona Restaurant
Association,   Arizona  Retailers  Association,  Boeing,  Arizona  School  Board
Association,  National  Federation of  Independent  Business,  Arizona  Hospital
Association,  Lockheed  Martin,  Abbot Labs and Raytheon.

                                       3

                                              DOCKET NO. E-01345A-98-0473 ET AL.

of the Commission  appeared through counsel.  Evidence was presented  concerning
the  Settlement  Agreement,  and after a full  public  hearing,  this matter was
adjourned pending submission of a Recommended Opinion and Order by the Presiding
Officer to the Commission.  In addition,  a post-hearing  briefing  schedule was
established with simultaneous briefs filed on August 5, 1999.

                                   DISCUSSION
                                   ----------

Introduction
- ------------

         The  Settlement  provides  for  rate  reductions  for  residential  and
commercial customers;  sets the amount,  method, and recovery period of stranded
cost that APS can collect in customer charges;  establishes unbundled rates; and
provides that APS will separate its generating facilities, which will operate in
the competitive market, from its distribution  system, which will continue to be
regulated.

         According  to APS,  the  Settlement  was the  product of months of hard
negotiations  with  various  customer  groups.  APS opined  that the  Settlement
provides many clear benefits to customers,  potential competitors, as well as to
APS. Some of those benefits are as follows:

         o        Allowing  competition  to commence in APS'  service  territory
                  months  before  otherwise  possible and  expanding the initial
                  eligible load by 140 MW;

         o        Establishing  both Standard Offer and Direct Access rates, and
                  providing for annual rate reductions  with a cumulative  total
                  of as much as $475 million by 2004;

         o        Ensuring   stability   and  certainty  for  both  bundled  and
                  unbundled rates;

         o        Resolving  the issue of APS'  stranded  costs  and  regulatory
                  asset recovery in a fair and equitable manner;

         o        Providing for the  divestiture of generation  and  competitive
                  services by APS in a cost-effective manner;

         o        Removing  the  specter  of years  of  litigation  and  appeals
                  involving APS and Commission over competition-related issues;

         o        Continuing support for a regional ISO and the AISA;

         o        Continuing support for low income programs; and

         o        Requiring  APS to file an  interim  code of conduct to address
                  affiliate relationships.

                                       4

                                              DOCKET NO. E-01345A-98-0473 ET AL.

         The  Settlement  was  entered  into by RUCO  and  the  ACAA  reflecting
Agreement  by  residential  customers  of  APS  to the  Settlement's  terms  and
conditions. In addition, the Settlement was executed by the AECC, a coalition of
commercial and  industrial  customers and trade  associations.  AECC opined that
since residential and  non-residential  customers have agreed to the Settlement,
the "public  interest" has been served.  AECC  indicated the  Settlement was not
perfect  but was  the  result  of  "give  and  take"  by  each  of the  parties.
Accordingly,  AECC urged the  Commission  to protect  the "public  interest"  by
approving the  Settlement  and not allow Energy  Service  Providers  ("ESPs") to
delay the benefits that competition has to offer.

Legal Issues:
- -------------

         The Arizona  Consumers  Council  ("Consumers  Council") opined that the
Agreement  was not legal  because:  (1) There was no full rate  proceeding;  (2)
Section  2.8  of  the  Agreement  violates  A.R.S.  Section  40-246,   regarding
Commission  initiated rate  reductions;  and (3) The Agreement  illegally  binds
future Commissions.  According to the Consumers Council, the Commission does not
have evidence to support a finding that the rates  proposed in the Agreement are
just and  reasonable;  that the rate base  proposed is proper,  and asserted the
proposed adjustment clause can not be established outside a general rate case.

         Staff argued that the Commission in Decision No. 59601, dated April 26,
1996, has previously  determined just and reasonable rates for APS which must be
charged until changed in a rate  proceedings.  According to Staff,  this case is
not about changing  existing rates, but instead involves the introduction of new
service-direct  access.  The direct access rates have been designed to replicate
the revenue  flow from  existing  rates.  Staff opined that the  Commission  has
routinely, and lawfully, approved rates for new services outside of a rate case.
Further,  Staff  asserted that the rates proposed in the Settlement are directly
related to a complete  financial  review.  Staff  indicated  that the  Consumers
Council  has  provided  no  contrary  information  and  should not be allowed to
collaterally attack Decision No. 59601.

         APS argued that no determination of fair value rate base ("FVRB"), fair
value rate of return ("FVROR"), or other financial analysis is legally necessary
to justify current APS rate levels,  allow the introduction of a new service, or
to evaluate a series of  voluntary  rate  decreases.  In spite of that,  APS did

                                       5

                                              DOCKET NO. E-01345A-98-0473 ET AL.

provide  information  to  support  a FVRB of  $5,195,675,000  and  FVROR of 6.63
percent.  No other party presented evidence in support of a FVRB or FVROR. Staff
supported APS.

         We concur with Staff and APS.  The  Consumers  Council has  provided no
legal  authority  that a full rate  proceeding  is necessary in order to adopt a
rate  reduction  or rates for new  services.  Further,  pursuant  to the Arizona
Constitution,  the Commission has jurisdiction over ratemaking  matters. We also
find that notice of the  application  and hearing was  provided and that APS has
provided  sufficient  financial  information  to  support a finding  of FVRB and
FVROR.  Lastly,  this Commission can clearly bind future Commissions as a result
of its Decision.  However, as later discussed, we agree there are limitations to
such legal authority. Shopping Credit

         One of the most contentious  issues in the hearing was the level of the
"shopping   credit."  The  "shopping  credit"  is  the  difference  between  the
customer's Standard Offer Rate and the Direct Access Rate available to customers
who take  service from ESPs.  The ESPs  generally  argued that the  Settlement's
"shopping  credits" were not sufficient to allow a new entrant to make a profit.
AECC opined that such an  argument  was nothing  more than a request to increase
ESP's profits.

         Staff opined that the "shopping  credit" was too low and recommended it
be  increased  without  impacting  the  stranded  cost  recovery  amount of $350
million. Under Staff's proposal, the increased "shopping credit" would be offset
by  reducing  the  competitive   transition  charge  ("CTCs").   Further,  Staff
recommended  that any stranded costs not collected  could simply be deferred and
collected after 2004.

         The  AECC  expert  testified  that  the  "shopping  credit"  under  the
Agreement was superior to the "Shopping Credit" in the Staff Settlement Proposal
as well as the one offered to SRP's customers. APS argued that artificially high
shopping  credits will likely  increase ESP profits  without  lowering  customer
rates and will  encourage  inefficient  firms to enter the market.  Based on the
analysis of the 40kW to 200 kW customer  group(2),  APS showed an average margin
on the  "shopping  credit"  of over 8 mils per kWh or a 23 percent  markup  over
cost. APS asserted that the test for a reasonable  "shopping credit" "should not
be whether all ESPs can profit on all APS customers all of the time".

- ----------
(2) Represents over 80 percent of the general service  customers for competitive
access in phase one.

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                                              DOCKET NO. E-01345A-98-0473 ET AL.

         Based on the evidence  presented,  the "shopping  credits" appear to be
reasonable to allow ESPs to compete in an efficient manner.  Further,  we do not
find  customer  rates  should  be  increased  simply  to have  higher  "shopping
credits".

Metering and Billing Credits
- ----------------------------

         The metering and billing credits resulting from the Agreement are based
on  decremental  costs.  Several of the ESPs and Staff argued that these credits
should be based upon embedded  costs and not  decremental  costs.  APS responded
that such a result could cause them to lose revenues  since its costs would only
go down by the decremental  amounts.  Staff testified that the Company would not
lose  significant  income  if it used  embedded  costs  since it  would  free up
resources to service new customers.

         We concur.  The  proposed  credits  for  metering,  meter  reading  and
billing(3) will result in a direct access customer paying a portion of APS costs
as well as a portion  of the ESP's  costs.  We  believe  this  would  stymie the
competitive market for these services.  As a result, we find the approval of the
Settlement  should be conditioned  upon the use of Staff's  proposed credits for
metering, meter reading, and billing.

Proposed One-Year Advance Notice Requirement:
- ---------------------------------------------

         Section 2.3 provides that

                  "Customers greater than 3MW who chose a direct access supplier
                  must give APS one year's  advance notice before being eligible
                  to return to Standard Offer service." [emphasis added]

         Several parties expressed concerns that the one-year notice requirement
to return to Standard  Offer service would create a deterrent to load  switching
by large industrial,  institutional and commercial customers. PG&E proposed that
any increased  cost could be charged  directly to the customer as a condition to
its return.

         We agree that APS needs to have some protection from customers  leaving
the system when market  prices are low and jumping back on Standard  Offer rates
when market prices go up. The suggestion by PG&E that the customer be allowed to
go back to the  Standard  Offer if the  customer  pays for  additional  costs it
caused merits consideration and we will order APS to propose substitute language
on this issue.

- ----------------
(3) For example,  the monthly credits for a direct access residential  customers
are  $1.30,   $0.30,  and  $0.30  for  metering,   meter  reading  and  billing,
respectively.

                                       7

                                              DOCKET NO. E-01345A-98-0473 ET AL.

Section 2.8
- -----------

         Several  of the  parties  expressed  concern  that  Section  2.8 of the
Agreement  allows  APS  to  seek  rate  increases  under  specified  conditions.
Additionally, as previously discussed, the Consumers Council opined that Section
2.8 violated A.R.S.  Section 40-246.  Staff recommended the Commission condition
approval of the Agreement on Section 2.8 being amended to include  language that
the Commission or Staff may commence rate change  proceedings  under  conditions
paralleling  those  provided to the  utility,  including  response to  petitions
submitted under A.R.S. ss. 40-246.

         We agree that Section 2.8 is too restrictive on the Commission's future
action. Accordingly, we will condition approval of the Agreement on inclusion of
the following language in Section 2.8:

                  The  Commission  shall not be prevented from  commencing  rate
                  change   proceedings,   including   responding   to  petitions
                  submitted under A.R.S.  ss. 40-246.  However,  any result from
                  such  proceeding  shall not modify the  collection of stranded
                  cost  approved  herein nor result in any reduction in the rate
                  decreases approved herein by customer class.

Section 7.1
- -----------

         The Consumers  Council  opined that there was language in the Agreement
which would  illegally bind future  Commissions.  While Staff disagreed with the
legal opinion of the  Consumers  Council,  Staff was concerned  with some of the
binding language in the Agreement and in particular with the following  language
in Section 7.1:

         7.1.     To the extent any provision of this Agreement is  inconsistent
                  with  any  existing  or  future   Commission  order,  rule  or
                  regulation or is  inconsistent  with the Electric  Competition
                  Rules as now existing or as may be amended in the future,  the
                  provisions of this Agreement shall control and the approval of
                  the Agreement by the Commission  shall be deemed to constitute
                  a   Commission-approved   variation   or   exemption   to  any
                  conflicting provision of the Electric Competition Rules.

Staff recommended the Commission not approve Section 7.1

         We share Staff's  concerns.  We also recognize that the parties want to
preserve  their benefits to their  Agreement.  We agree with the parties that to
the extent any  provision  of the  Agreement is  inconsistent  with the Electric

                                       9

                                              DOCKET NO. E-01345A-98-0473 ET AL.

Competition  Rules  as  finalized  by the  Commission  in  September  1999,  the
provisions of the  Agreement  shall  control.  We want to make it clear that the
Commission  does  not  intend  to  revisit  the  stranded  cost  portion  of the
Agreement. It is also not the Commission's intent to undermine the benefits that
parties have bargained for. With that said, the Commission  must be able to make
rule  changes/other  future  modifications that become necessary over time. As a
result, we will direct the parties to file a revised Section 7.1 consistent with
the Commission's discussions herein.

Generation Affiliate
- --------------------

         Section 4.1 of the Agreement provides the following:

         4.1      The  Commission  will approve the formation of an affiliate or
                  affiliates  of APS to acquire  at book  value the  competitive
                  services   assets  as  currently   required  by  the  Electric
                  Competition  Rules.  In order to facilitate  the separation of
                  such assets  efficiently  and at the lowest possible cost, the
                  Commission shall grant APS a two-year  extension of time until
                  December 31, 2002, to accomplish  such  separation.  A similar
                  two-year  extension  shall be authorized for  compliance  with
                  A.A.C. R14-2-1606(B).

Related to Section  4.1 is Section  2.6(3)  which  allows APS to defer  costs of
forming the generation affiliate, to be collected beginning July 1, 2004.

         According to NEV Southwest,  APS indicated that it intends to establish
a generation  affiliate  under Pinnacle West, not under APS.  Further,  that APS
intends to procure  generation for standard  offer  customers from the wholesale
generation   market  as  provided  for  in  the  Electric   Competition   Rules.
Additionally, it was NEV Southwest's understanding that the affiliate generation
company  could bid for the APS  standard  offer  load  under an  affiliate  FERC
tariff, but there would be no automatic privilege outside of the market bid. NEV
Southwest  supports  the   aforementioned   concepts  and  recommended  they  be
explicitly stated in the Agreement.

         We concur  with NEV  Southwest.  To the extent that NEV  Southwest  has
properly  stated  the  intent  of APS,  such  language  should  be  added to the
Agreement.  We generally support the request of APS to defer those costs related
to formation of a new generation  affiliate pursuant to the Electric Competition
Rules.  We also recognize the Company is making a business  decision to transfer
the generation  assets to an affiliate instead of an unrelated third party. As a

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                                              DOCKET NO. E-01345A-98-0473 ET AL.

result,  we find the Company's  proposed  mitigation of stranded costs(4) in the
Settlement  should  also  apply  to the  costs  of  forming  the new  generation
affiliate.  Accordingly,  Section 2.6(3) should be modified to reflect that only
67 percent of those costs to transfer generation assets to an affiliate shall be
allowed to be deferred for future collection.

         Some parties were concerned that Sections 4.1 and 4.2 provide in effect
that the  Commission  will have  approved  in  advance  any  proposed  financing
arrangements  associated with future transfers of "competitive  services" assets
to an affiliate.  As a result,  there was a  recommendation  that the Commission
retain  the  right to  review  and  approve  or reject  any  proposed  financing
arrangements.  In  addition,  some  parties  expressed  concern that APS has not
definitely  described the assets it will retain and which it will transfer to an
affiliate.

         We share  the  concerns  that the  non-competitive  portion  of APS not
subsidize  the  spun-off   competitive   assets  through  an  unfair   financial
arrangement.  We  want to  make  it  clear  that  the  Commission  will  closely
scrutinize  the  capital  structure  of APS at its 2004  rate  case and make any
necessary  adjustments.  Further, while the Commission supports and approves the
concept  of  transferring  generation  assets  and  competitive  services  to an
affiliate, the Commission reserves the right to review and approve of the actual
assets and services to be transferred.

Unbundled Rates
- ---------------

         Several parties expressed concern that the Agreement's  unbundled rates
fail to provide the necessary  information  to determine  whether a competitor's
price is lower  than the  Standard  Offer  rate.  Further,  Some of the  parties
asserted that APS has not performed a functional  cost-of-service study and as a
result the Settlement's "shopping credit" is an artificial division of costs. In
response,  APS  indicated  the  Standard  Offer rates can not be  unbundled on a
strict  cost-of-service  basis unless the Standard Offer rates are redesigned to
equal  cost-of-service.   APS  opined  that  such  a  process  would  result  in
significant rate increases for many customers.

         AECC  asserted  that  a full  rate  case  would  result  in  additional
months/years  of delay  with  continued  drain of  resources  by all  interested
entities.

- ---------
(4) Agreement to not recover $183 million out of a claimed $533 million.

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                                              DOCKET NO. E-01345A-98-0473 ET AL.

         The ESPs  asserted  that the bill format  proposed by APS is misleading
and too  complex.  In general,  the ESPs  desired a bill format that would allow
customers to easily compare Standard Offer and Direct Access charges in order to
make an  informal  decision.  As a result,  APS was  directed  to  circulate  an
Informational  Unbundled  Standard  Offer  Bill  ("Bill")  to  the  parties  for
comments.  Subsequent to the hearing,  a Bill was  circulated to the parties for
comments to determine what consensus could be reached on its format. In general,
there  was  little  dispute  with the  format  of the  Bill.  However,  PG&E and
Commonwealth disagreed with the underlying cost allocation methodologies.  Enron
was concerned that Bill portrayed the Standard Offer to be more  simplistic than
the Direct Access  portion of the Bill.  Enron proposed a bill format that would
clearly  identify  those  services  which are  available  from an ESP.  Based on
comments from RUCO and Staff, APS made general revisions to the proposed Bill.

         We find the APS Attachment AP-1R, second revised dated 8/16/99 provides
sufficient  information  in a  concise  manner to  enable  customers  to make an
informed  choice.  (See  Attachment  No. 2 herein).  However,  we find the Enron
breakdown into a Part 1 versus Parts 2 and 3 will further help educate customers
as to choice.  We will direct APS to further revise its Bill to have a Part 1 as
set forth by the Enron  breakdown.  We believe Parts 2 and 3 can be combined for
simplicity.

         We  concur  with  APS  that  it is not  necessary  to  file  a  revised
cost-of-service  study at this time. The proposed Standard Offer rates contained
in the Settlement  are based on existing  tariffs  approved by this  Commission.
Further,   we   concur   with  AECC  that  a  full  rate  case  with  a  revised
cost-of-service  study would result in months/years of additional delay. Lastly,
the Standard Offer rates as proposed in the  Settlement are consistent  with the
Commission's requirement that no customer shall receive a rate increase.
The following was extracted from Decision No. 61677:

                  "No customer or customer  class shall  receive a rate increase
         as a result of stranded cost recovery by an Affected  Utility under any
         of these options."

Code of Conduct
- ---------------

         There were concerns expressed that APS would be writing its own Code of
Conduct. Subsequently, APS did provide a copy of its proposed Code of Conduct to
the parties for comment.

                                       11

                                              DOCKET NO. E-01345A-98-0473 ET AL.

         Based on the above,  we will direct APS to file with the  Commission no
later than 30 days of the date of this  Decision,  its interim  Code of Conduct.
APS should  indicate  which  parties are in agreement  with the proposed Code of
Conduct. Subsequently, within 10 days of filing the Code of Conduct, the Hearing
Division   shall   establish   a   procedural   schedule  to  hear  the  matter.

Analysis/Summary
- ----------------

         Consistent with our  determination in Decision No. 60977, the following
primary  objectives need to be taken into  consideration in deciding the overall
stranded cost issue:

         A.       Provide the  Affected  Utilities a reasonable  opportunity  to
                  collect 100 percent of their unmitigated stranded costs;

         B.       Provide  incentives  for the  Affected  Utilities  to maximize
                  their mitigation effort;

         C.       Accelerate the collection of stranded costs into as short of a
                  transition   period  as   possible   consistent   with   other
                  objectives;

         D.       Minimize  the stranded  cost impact on customers  remaining on
                  the standard offer;

         E.       Don't confuse customers as to the bottom line; and

         F.       Have full generation competition as soon as possible.

The  Commission  also  recognized in Decision No. 60977 that the  aforementioned
objectives were in conflict. Part of that conflict is reflected in the following
language extracted from Decision No. 60977:

                  One of the main  concerns  expressed  over and over by various
         consumer  groups was that the small  consumers would end up with higher
         costs during the  transition  phase and all the benefits  would flow to
         the larger  users.  At the time of the hearing,  there had been minimal
         participation in California by residential customers in the competitive
         electric market place. It is not the Commission's  intent to have small
         consumers pay higher  short-term  costs in order to provide lower costs
         for the larger  consumers.  Accordingly,  we will place  limitations on
         stranded  cost  recovery  that will minimize the impact on the standard
         offer.

         Decision  No.  61677  modified  Decision  No.  60977 and  allowed  each
Affected Utility to chose from five options and also provided the following:

         With the modifications contained herein, we find the overall Settlement
satisfies the objectives set forth in Decision Nos. 60977 and 61677.  We believe
the  Settlement  will  result  in an  orderly  process  that will have real rate

                                       12

                                              DOCKET NO. E-01345A-98-0473 ET AL.

reductions(5)  during the transition period to a competitive  generation market.
The  Settlement  allows every APS customer to have the immediate  opportunity to
benefit from the change in market  structure while  maintaining  reliability and
certainty of delivery.  Further, the Settlement in conjunction with the Electric
Rules will provide  every APS customer  with a choice in a reasonable  timeframe
and in an orderly manner. If anything,  the Proposed Settlement favors customers
over  competitors  in the short run since APS has agreed to  reductions in rates
totaling 7.5 percent.  This  Commission  supports  competition in the generation
market  because of increased  benefits to customers,  including  lower rates and
greater choice. While some of the potential  competitors have argued that higher
"shopping credits" will result in greater choice, we find that a higher shopping
credit would also mean less of a rate reduction for APS customers.  We find that
the  Settlement  strikes the proper  balance  between  competing  objectives  by
allowing   immediate  rate  reductions  while  maintaining  a  relatively  short
transition period for collection of stranded costs,  followed shortly thereafter
with a full rate case. At that point in time the  collection  of stranded  costs
will be completed and unbundled rates can be modified based upon an updated cost
study which should encourage the competitive market.

                               * * * * * * * * * *

         Having  considered  the entire record herein and being fully advised in
the premises, the Commission finds, concludes, and orders that:

                                FINDINGS OF FACT
                                ----------------

         1. APS is certificated to provide  electric service as a public service
corporation in the State of Arizona.

         2.  Decision No. 59943 enacted  R14-2-1601  through  -1616,  the Retail
Electric Competition Rules.

         3. Following a hearing on generic issues related to stranded costs, the
Commission issued Decision No. 60977, dated June 22, 1998.

         4. Decision No. 61071 adopted the Emergency Rules on a permanent basis,
including Staff's additional changes proposed on November 24, 1998.

- -----------------
(5) There have been  instances in other states  where  customers  were told they
would receive rate decreases which were then offset by a stranded cost add-on.

                                       13

                                              DOCKET NO. E-01345A-98-0473 ET AL.

         5. On August 21, 1998, APS docketed the Stranded Costs filing.

         6. On November 5, 1998, APS filed the Staff Settlement Proposal.

         7. Our November 24, 1998 Procedural Order set the matter for hearing.

         8. Decision No. 61259 established an expedited  procedural schedule for
evidentiary hearings on the Staff Settlement Proposal.

         9. The Court  issued a Stay of the  Commission's  consideration  of the
Staff Settlement Proposal.

         10.  Staff  withdrew  the Staff  Settlement  Proposal  from  Commission
consideration.

         11. On May 17, 1999,  APS filed its  Settlement  requesting  Commission
approval.

         12. Our May 25, 1999  Procedural  Order set the  Settlement for hearing
commencing on July 14, 1999.

         13. Decision No. 61311 (January 11, 1999) stayed the  effectiveness  of
the Emergency Rules and related  Decisions,  and ordered the Hearing Division to
conduct further proceedings in this Docket.

         14. In Decision No.  61634 (April 23,  1999),  the  Commission  adopted
modifications  to R14-2-201  through-207,  -210 and 212 and  R14-2-1601  through
- -1617.

         15.  Pursuant  to  Decision  No.  61677,  dated  April  27,  1999,  the
Commission  modified  Decision No. 60977  whereby each  Affected  Utility  could
choose one of the  following  options:  (a) Net Revenues Lost  Methodology;  (b)
Divestiture/Auction   Methodology;  (c)  Financial  Integrity  Methodology;  (d)
Settlement Methodology; and (e) the Alternative Methodology.

         16. APS and other Affected  Utilities  filed with the Arizona  Superior
Court various appeals of Commission  Orders  adopting the Competition  Rules and
regarding Stranded Cost (the "Outstanding Litigation").

         17. Pursuant to Decision No. 61677,  APS, RUCO,  AECC, and ACAA entered
into the Settlement to resolve  numerous  issues,  including  stranded costs and
unbundled tariffs.

         18.  The  difference  between  market  based  prices  and  the  cost of
regulated power has been generally referred to as stranded costs.

                                       14

                                              DOCKET NO. E-01345A-98-0473 ET AL.

         19. Any stranded cost recovery  methodology  must balance the interests
of the Affected Utilities, ratepayers, and the move toward competition.

         20. All current and future  customers of the Affected  Utilities should
pay their fair share of stranded costs.

         21. Pursuant to the terms of the Settlement  Agreement,  APS has agreed
to the modification of its CC&N in order to implement  competitive retail access
in its Service Territory.

         22. The Settlement  Agreement provides for competitive retail access in
APS' Service Territory,  establishes rate reductions for all APS customers, sets
a mechanism for stranded cost recovery,  resolves  contentious  litigation,  and
therefore, is in the public interest and should be approved.

         23. The terms and  conditions of the  Settlement  Agreement as modified
herein are just and reasonable and in the public interest.

         24. The  information  and  formula  for rate  reductions  contained  in
Exhibit  AP-3  Appended  to  APS  Exhibit  No.  2  provides  current   financial
information supporting current rates.

         25.  RUCO,  ACAA,  and  AEC  collectively,  represent  residential  and
non-residential customers.

         26. APS  proposed a second  page to the  Standard  Offer bill that will
enable  customers  to compare  Standard  Offer  rates with those of  competitive
suppliers.

         27. All else being equal,  higher shopping  credits will result in less
of a rate reduction.

         28. According to AECC, the Agreement results in higher shopping credits
than in the Staff Proposal as well as those offered by SRP.

         29. The decremental  approach for metering and billing will not provide
sufficient credits for competitors to compete.

         30. Pursuant to the Settlement, customers will receive substantial rate
reductions without the necessity of a full rate case.

         31. An APS rate case would take a minimum of one year to complete.

         32. The "shopping credit" can be increased by increasing Standard Offer
rates.

         33. All else being equal,  a higher  shopping  credit will increase the
incentive for an ESP to enter the market.

                                       15

                                              DOCKET NO. E-01345A-98-0473 ET AL.

         34.  ESPs that have been  approved  have shown more of an  interest  in
serving larger business customers than residential customers.

         35. It is not in the customers' interests to forego guaranteed Standard
Offer rate reductions in order to maintain a higher shopping credit.

         36. The  Settlement  will  permit  competition  quickly  and insure all
customers benefit during the transition period.

                               CONCLUSIONS OF LAW
                               ------------------

         1. The Affected  Utilities are public service  corporations  within the
meaning of the Arizona  Constitution,  Article XV, under A.R.S.  ss.ss.  40-202,
- -203,  -250,  -321,  -322,  -331,  -336, -361, -365, -367, and under the Arizona
Revised Statutes, Title 40, generally.

         2. The Commission has jurisdiction  over the Affected  Utilities and of
the subject matter contained herein.

         3. Notice of the proceeding has been given in the manner  prescribed by
law.

         4. The Settlement  Agreement as modified  herein is just and reasonable
and in the public interest and should be approved.

         5. APS should be  authorized  to implement  its Stranded  Cost Recovery
Plan as set forth in the Settlement Agreement.

         6. APS' CC&N should be modified in order to permit  competitive  retail
access in APS' CC&N service territory.

         7. APS should be  granted  the  waivers  that it has  requested  in the
Settlement Agreement.

         8. APS' Interim Code of Conduct should be approved  consistent with the
terms of the Settlement Agreement.

                                      ORDER
                                      -----

         IT IS  THEREFORE  ORDERED  that the  Settlement  Agreement  as modified
herein  is  hereby   approved  and  all  Commission   findings,   approvals  and
authorizations requested therein are hereby granted.

                                       16

                                              DOCKET NO. E-01345A-98-0473 ET AL.

         IT IS FURTHER  ORDERED that Arizona  Public  Service  Company's CC&N is
hereby  modified  to  permit  competitive  retail  access  consistent  with this
Decision and the Competition Rules.

         IT IS FURTHER ORDERED that within 30 days of the date of this Decision,
Arizona  Public  Service  Company  shall  file a proposed  Code of  Conduct  for
Commission approval.

         IT IS FURTHER  ORDERED  that  within ten days of the date the  proposed
Code of Conduct is filed,  the Hearing  Division shall issue a Procedural  Order
setting a procedural schedule for consideration of the Code of Conduct.

         IT IS  FURTHER  ORDERED  that  this  Decision  shall  become  effective
immediately.

                BY ORDER OF THE ARIZONA CORPORATION COMMISSION.




- --------------------------------------------------------------------------------
CHAIRMAN                       COMMISSIONER                        COMMISSIONER


                          IN  WITNESS  WHEREOF,  I, BRIAN C.  McNEIL,  Executive
                          Secretary of the Arizona Corporation Commission,  have
                          hereunto set my hand and caused the  official  seal of
                          the  Commission  to be affixed at the Capitol,  in the
                          City of Phoenix, this day of _______, 1999.

                          -------------------------------
                          BRIAN C. McNEIL
                          EXECUTIVE SECRETARY

DISSENT _________________
JLR:dap

                                       17

SERVICE LIST FOR:                   ARIZONA PUBLIC SERVICE COMPANY

DOCKET NOS.:                        E-01345A-98-0473,  E-01345A-97-0773  and RE-
                                    00000C-94-0165

Service List for RE-00000C-94-0165

Paul A. Bullis, Chief Counsel
LEGAL DIVISION
1200 W. Washington Street
Phoenix, Arizona 85007

Utilities Division Director
ARIZONA CORPORATION COMMISSION
1200 W. Washington Street
Phoenix, Arizona 85007


                                  ATTACHMENT 1

                              SETTLEMENT AGREEMENT

                                  May 14, 1999

      This settlement agreement ("Agreement") is entered into as of May 14,
1999, by Arizona Public Service Company ("APS" or the "Company") and the various
signatories to this Agreement (collectively, the "Parties") for the purpose of
establishing terms and conditions for the introduction of competition in
generation and other competitive services that are just, reasonable and in the
public interest.

                                  INTRODUCTION

      In Decision No. 59943, dated December 26, 1996, the Arizona Corporation
Commission ("ACC" or the "Commission") established a "framework" for
introduction of competitive electric services throughout the territories of
public service corporations in Arizona in the rules adopted in A.A.C. R14-2-1601
ET SEQ. (collectively, "Electric Competition Rules" as they may be amended from
time to time). The Electric Competition Rules established by that order
contemplated future changes to such rules and the possibility of waivers or
amendments for particular companies under appropriate circumstances. Since their
initial issuance, the Electric Competition Rules have been amended several times
and are currently stayed pursuant to Decision No. 61311, dated January 5, 1999.
During this time, APS, Commission Staff and other interested parties have
participated in a number of proceedings, workshops, public comment sessions and
individual negotiations in order to further refine and develop a restructured
utility industry in Arizona that will provide meaningful customer choice in a
manner that is just, reasonable and in the public interest.

      This Agreement establishes the agreed upon transition for APS to a
restructured entity and will provide customers with competitive choices for
generation and certain other retail services. The Parties believe this Agreement
will produce benefits for all customers through implementing customer choice and
providing rate reductions so that the APS service territory may benefit from
economic growth. The Parties also believe this Agreement will fairly treat APS
and its shareholders by providing a reasonable opportunity to recover prudently
incurred investments and costs, including stranded costs and regulatory assets.

      Specifically, the Parties believe the Agreement is in the public interest
for the following reasons. FIRST, customers will receive substantial rate
reductions. SECOND, competition will be promoted through the introduction of
retail access faster than would have been possible without this Agreement and by
the functional separation of APS' power production and delivery functions.
THIRD, economic development and the environment will

benefit through guaranteed rate reductions and the continuation of renewable and
energy efficiency programs. FOURTH, universal service coverage will be
maintained through APS' low income assistance programs and establishment of
"provider of last resort" obligations on APS for customers who do not wish to
participate in retail access. FIFTH, APS will be able to recover its regulatory
assets and stranded costs as provided for in this Agreement without the
necessity of a general rate proceeding. Sixth, substantial litigation and
associated costs will be avoided by amicably resolving a number of important and
contentious issues that have already been raised in the courts and before the
Commission. Absent approval by the Commission of the settlement reflected by
this Agreement, APS would seek full stranded cost recovery and pursue other rate
and competitive restructuring provisions different than provided for herein. The
other Parties would challenge at least portions of APS' requested relief,
including the recovery of all stranded costs. The resulting regulatory hearings
and related court appeals would delay the start of competition and drain the
resources of all Parties.

      NOW, THEREFORE, APS and the Parties agree to the following provisions
which they believe to be just, reasonable and in the public interest:


                               TERMS OF AGREEMENT

                                     ARTICLE I
                         IMPLEMENTATION OF RETAIL ACCESS

      1.1 The APS distribution system shall be open for retail access on July 1,
1999; provided, however, that such retail access to electric generation and
other competitive electric services suppliers will be phased in for customers in
APS' service territory in accordance with the proposed Electric Competition
Rules, as and when such rules become effective, with an additional 140 MW being
made available to eligible non-residential customers. The Parties shall urge the
Commission to approve Electric Competition Rules, at least on an emergency
basis, so that meaningful retail access can begin by July 1, 1999. Unless
subject to judicial or regulatory restraint, APS shall open its distribution
system to retail access for all customers on January 1, 2001.

      1.2 APS will make retail access available to residential customers
pursuant to its December 21, 1998, filing with the Commission.

      1.3 The Parties acknowledge that APS' ability to offer retail access is
contingent upon numerous conditions and circumstances, a number of which are not
within the direct control of the Parties. Accordingly, the Parties agree that it
may become necessary to modify the terms of retail access to account for such
factors, and they further agree to address such matters in good faith and to
cooperate in an effort to propose joint resolutions of any such matters.

                                       2

      1.4. APS agrees to the amendment and modification of its Certificate(s) of
Convenience and Necessity to permit retail access consistent with the terms of
this Agreement. The Commission order adopting this Agreement shall constitute
the necessary Commission Order amending and modifying APS' CC&Ns to permit
retail access consistent with the terms of this Agreement.

                                   ARTICLE II
                                  RATE MATTERS

      2.1. The Company's unbundled rates and charges attached hereto as Exhibit
A will be effective as of July 1, 1999. The Company's presently authorized rates
and charges shall be deemed its standard offer ("Standard Offer") rates for
purposes of this Agreement and the Electric Competition Rules. Bills for
Standard Offer service shall indicate individual unbundled service components to
the extent required by the Electric Competition Rules.

      2.2. Future reductions of standard offer tariff rates of 1.5% for
customers having loads of less than 3 MW shall be effective as of July 1, 1999,
July 1, 2000, July 1, 2001, July 1, 2002, and July 1, 2003, upon the filing and
Commission acceptance of revised tariff sheets reflecting such decreases. For
customers having loads greater than 3 MW served on Rate Schedules E-34 and E-35,
Standard Offer tariff rates will be reduced: 1.5%, effective July 1, 1999; 1.5%
effective July 1, 2000; 1.25% effective July 1, 2001; and .75% effective July 1,
2002. The 1.5% Standard Offer rate reduction to be effective July 1, 1999,
includes the rate reduction otherwise required by Decision No. 59601. Such
decreases shall become effective by the filing with and acceptance by the
Commission of revised tariff sheets reflecting each decrease.

      2.3. Customers greater than 3 MW who choose a direct access supplier must
give APS one year's advance notice before being eligible to return to Standard
Offer service.

      2.4. Unbundled rates shall be reduced in the amounts and at the dates set
forth in Exhibit A attached hereto upon the filing and Commission acceptance of
revised tariff sheets reflecting such decreases.

      2.5. This Agreement shall not preclude APS from requesting, or the
Commission from approving, changes to specific rate schedules or terms and
conditions of service, or the approval of new rates or terms and conditions of
service, that do not significantly affect the overall earnings of the Company or
materially modify the tariffs or increase the rates approved in this Agreement.
Nothing contained in this Agreement shall preclude APS from filing changes to
its tariffs or terms and conditions of service which are not inconsistent with
its obligations under this Agreement.

      2.6. Notwithstanding the rate reduction provisions stated above, the
Commission shall, prior to December 31, 2002, approve an adjustment clause or
clauses which

                                       3

will provide full and timely recovery beginning July 1, 2004, of the reasonable
and prudent costs of the following:

     (1)  APS' "provider of last resort" and Standard Offer obligations for
          service after July 1, 2004, which costs shall be recovered only from
          Standard Offer and "provider of last resort" customers;

     (2)  Standard Offer service to customers who have left Standard Offer
          service or a special contract rate for a competitive generation
          supplier but who desire to return to Standard Offer service, which
          costs shall be recovered only from Standard Offer and "provider of
          last resort" customers;

     (3)  compliance with the Electric Competition Rules or Commission-ordered
          programs or directives related to the implementation of the Electric
          Competition Rules, as they may be amended from time to time, which
          costs shall be recovered from all customers receiving services from
          APS; and

     (4)  Commission-approved system benefit programs or levels not included in
          Standard Offer rates as of June 30, 1999, which costs shall be
          recovered from all customers receiving services from APS.

By June 1, 2002, APS shall file an application for an adjustment clause or
clauses, together with a proposed plan of administration, and supporting
testimony. The Commission shall thereafter issue a procedural order setting such
adjustment clause application for hearing and including reasonable provisions
for participation by other parties. The Commission order approving the
adjustment clauses shall also establish reasonable procedures pursuant to which
the Commission, Commission Staff and interested parties may review the costs to
be recovered. By June 30, 2003, APS will file its request for the specific
adjustment clause factors which shall, after hearing and Commission approval,
become effective July 1, 2004. APS shall be allowed to defer costs covered by
this Section 2.6 when incurred for later full recovery pursuant to such
adjustment clause or clauses, including a reasonable return.

      2.7. By June 30, 2003, APS shall file a general rate case with prefiled
testimony and supporting schedules and exhibits; provided, however, that any
rate changes resulting therefrom shall not become effective prior to July 1,
2004.

      2.8. APS shall not be prevented from seeking a change in unbundled or
Standard Offer rates prior to July 1, 2004, in the event of (a) conditions or
circumstances which constitute an emergency, such as the inability to finance on
reasonable terms, or (b) material changes in APS' cost of service for Commission
regulated services resulting from federal, tribal,

                                       4

state or local laws, regulatory requirements, judicial decision, actions or
orders. Except for the changes otherwise specifically contemplated by this
Agreement, unbundled and Standard Offer rates shall remain unchanged until at
least July 1, 2004.

                                   ARTICLE III
                      REGULATORY ASSETS AND STRANDED COSTS

      3.1. APS currently recovers regulatory assets through July 1, 2004,
pursuant to Commission Decision No. 59601 in accordance with the provisions of
this Agreement.

      3.2. APS has demonstrated that its allowable stranded costs after
mitigation (which result from the impact of retail access), exclusive of
regulatory assets, are at least $533 million net present value.

      3.3. The Parties agree that APS should not be allowed to recover $183
million net present value of the amounts included above. APS shall have a
reasonable opportunity to recover $350 million net present value through a
competitive transition charge ("CTC") set forth in Exhibit A attached hereto.
Such CTC shall remain in effect until December 31, 2004, at which time it will
terminate. If by that date APS has recovered more or less than $350 million net
present value, as calculated in accordance with Exhibit B attached hereto, then
the nominal dollars associated with any excess recovery/under recovery shall be
credited/debited against the costs subject to recovery under the adjustment
clause set forth in Section 2.6(3).

      3.4. The regulatory assets to be recovered under this Agreement, after
giving effect to the adjustments set forth in Section 3.3, shall be amortized in
accordance with Schedule C of Exhibit A attached hereto.

      3.5. Neither the Parties nor the Commission shall take any action that
would diminish the recovery of APS' stranded costs or regulatory assets provided
for herein. The Company's willingness to enter into this Agreement is based upon
the Commission's irrevocable promise to permit recovery of the Company's
regulatory assets and stranded costs as provided herein. Such promise by the
Commission shall survive the expiration of the Agreement and shall be
specifically enforceable against this and any future Commission.

                                   ARTICLE IV
                               CORPORATE STRUCTURE

      4.1. The Commission will approve the formation of an
affiliate or affiliates of APS to acquire at book value the competitive services
assets as currently required by the Electric Competition Rules. In order to
facilitate the separation of such assets efficiently and at the lowest possible
cost, the Commission shall grant APS a two-year extension of time until

                                       5

December 31, 2002, to accomplish such separation. A similar two-year extension
shall be authorized for compliance with A.A.C. R14-2-1606(B).

      4.2. Approval of this Agreement by the Commission shall be deemed to
constitute all requisite Commission approvals for (1) the creation by APS or its
parent of new corporate affiliates to provide competitive services including,
but not limited to, generation sales and power marketing, and the transfer
thereto of APS' generation assets and competitive services, and (2) the full and
timely recovery through the adjustment clause referred to in Section 2.6 above
for all of the reasonable and prudent costs so incurred in separating
competitive generation assets and competitive services as required by proposed
A.A.C. R14-2-1615, exclusive of the costs of transferring the APS power
marketing function to an affiliate. The assets and services to be transferred
shall include the items set forth on Exhibit C attached hereto. Such transfers
may require various regulatory and third party approvals, consents or waivers
from entities not subject to APS' control, including the FERC and the NRC. No
Party to this Agreement (including the Commission) will oppose, or support
opposition to, APS requests to obtain such approvals, consents or waivers.

      4.3. Pursuant to A.R.S. ss. 40-202(L), the Commission's
approval of this Agreement shall exempt any competitive service provided by APS
or its affiliates from the application of various provisions of A.R.S. Title 40,
including A.R.S. ss.ss. 40-203, 40-204(A), 40-204(B), 40-248, 40-250, 40-251,
40-285, 40-301, 40-302, 40-303, 40-321, 40-322, 40-331, 40-332, 40-334, 40-365,
40-366, 40-367 and 40-401.

      4.4. APS' subsidiaries and affiliates (including APS' parent) may take
advantage of competitive business opportunities in both energy and non-energy
related businesses by establishing such unregulated affiliates as they deem
appropriate, which will be free to operate in such places as they may determine.
The APS affiliate or affiliates acquiring APS' generating assets may be a
participant in the energy supply market within and outside of Arizona. Approval
of this Agreement by the Commission shall be deemed to include the following
specific determinations required under Sections 32(c) and (k)(2) of the Public
Utility Holding Company Act of 1935:

         APS or an affiliate is authorized to establish a subsidiary company,
         which will seek exempt wholesale generator ("EWG") status from the
         Federal Energy Regulatory Commission, for the purposes of acquiring and
         owning Generation Assets.

         The Commission has determined that allowing the Generation Assets to
         become "eligible facilities," within the meaning of Section 32 of the
         Public Utility Holding Company Act ("PUHCA"), and owned by an APS EWG
         affiliate (1) will benefit consumers, (2) is in the public interest,
         and (3) does not violate Arizona law.

                                       6

         The Commission has sufficient regulatory authority, resources and
         access to the books and records of APS and any relevant associate,
         affiliate, or subsidiary company to exercise its duties under Section
         32(k) of PUHCA.

         APS will purchase any electric energy from its EWG affiliate at market
         based rates. This Commission has determined that (1) the proposed
         transaction will benefit consumers and does not violate Arizona law;
         (2) the proposed transaction will not provide APS' EWG affiliate an
         unfair competitive advantage by virtue of its affiliation with APS; (3)
         the proposed transaction is in the public interest.

The APS affiliate or affiliates acquiring APS' generating assets will be subject
to regulation by the Commission, to the extent otherwise permitted by law, to no
greater manner or extent than that manner and extent of Commission regulation
imposed upon other owners or operators of generating facilities.

      4.5. The Commission's approval of this Agreement will constitute certain
waivers to APS and its affiliates (including its parent) of the Commission's
existing affiliate interest rules (A.A.C. R14-2-801, ET SEQ.), and the
rescission of all or portions of certain prior Commission decisions, all as set
forth on Exhibit D attached hereto.

      4.6. The Parties reserve their rights under Sections 205 and 206 of the
Federal Power Act with respect to the rates of any APS affiliate formed under
the provisions of this Article IV.

                                    ARTICLE V
                            WITHDRAWAL OF LITIGATION

      5.1. Upon receipt of a final order of the Commission approving this
Agreement that is no longer subject to judicial review, APS and the Parties
shall withdraw with prejudice all of their various court appeals of the
Commission's competition orders.

                                   ARTICLE VI
                           APPROVAL BY THE COMMISSION

      6.1. This Agreement shall not become effective until the issuance of a
final Commission order approving this Agreement without modification on or
before August 1, 1999. In the event that the Commission fails to approve this
Agreement without modification according to its terms on or before August 1,
1999, any Party to this Agreement may withdraw from this Agreement and shall
thereafter not be bound by its provisions; provided, however, that if APS
withdraws from this Agreement, the Agreement shall be null and void and of no
further force and effect. In any event, the rate reduction provisions of this
Agreement shall not take effect until this Agreement is approved. Parties so
withdrawing shall be free to pursue

                                       7

their respective positions without prejudice. Approval of this Agreement by the
Commission shall make the Commission a Party to this Agreement and fully bound
by its provisions.

      6.2. The Parties agree that they shall make all reasonable and good faith
efforts necessary to (1) obtain final approval of this Agreement by the
Commission, and (2) ensure full implementation and enforcement of all the terms
and conditions set forth in this Agreement. Neither the Parties nor the
Commission shall take or propose any action which would be inconsistent with the
provisions of this Agreement. All Parties shall actively defend this Agreement
in the event of any challenge to its validity or implementation.

                                   ARTICLE VII
                              MISCELLANEOUS MATTERS

      7.1. To the extent any provision of this Agreement is inconsistent with
any existing or future Commission order, rule or regulation or is inconsistent
with the Electric Competition Rules as now existing or as may be amended in the
future, the provisions of this Agreement shall control and the approval of this
Agreement by the Commission shall be deemed to constitute a Commission-approved
variation or exemption to any conflicting provision of the Electric Competition
Rules.

      7.2. The provisions of this Agreement shall be implemented and enforceable
notwithstanding the pendency of a legal challenge to the Commission's approval
of this Agreement, unless such implementation and enforcement is stayed or
enjoined by a court having jurisdiction over the matter. If any portion of the
Commission order approving this Agreement or any provision of this Agreement is
declared by a court to be invalid or unlawful in any respect, then (1) APS shall
have no further obligations or liability under this Agreement, including, but
not limited to, any obligation to implement any future rate reductions under
Article II not then in effect, and (2) the modifications to APS' certificates of
convenience and necessity referred to in Section 1.4 shall be automatically
revoked, in which event APS shall use its best efforts to continue to provide
noncompetitive services (as defined in the proposed Electric Competition Rules)
at then current rates with respect to customer contracts then in effect for
competitive generation (for the remainder of their term) to the extent not
prohibited by law and subject to applicable regulatory requirements.

      7.3. The terms and provisions of this Agreement apply solely to and are
binding only in the context of the purposes and results of this Agreement and
none of the positions taken herein by any Party may be referred to, cited or
relied upon by any other Party in any fashion as precedent or otherwise in any
other proceeding before this Commission or any other regulatory agency or before
any court of law for any purpose except in furtherance of the purposes and
results of this Agreement.

      7.4. This Agreement represents an attempt to compromise and settle
disputed claims regarding the prospective just and reasonable rate levels, and
the terms and conditions

                                       8

of competitive retail access, for APS in a manner consistent with the public
interest and applicable legal requirements. Nothing contained in this Agreement
is an admission by APS that its current rate levels or rate design are unjust or
unreasonable.

      7.5. As part of this Agreement, APS commits that it will continue the
APS Community Action Partnership (which includes weatherization, facility repair
and replacement, bill assistance, health and safety programs and energy
education) in an annual amount of at least $500,000 through July 1, 2004.
Additionally, the Company will, subject to Commission approval, continue low
income rates E-3 and E-4 under their current terms and conditions.

      7.6. APS shall actively support the Arizona Independent Scheduling
Administrator ("AISA") and the formation of the Desert Star Independent System
Operator. APS agrees to modify its OATT to be consistent with any FERC approved
AISA protocols. The Parties reserve their rights with respect to any AISA
protocols, including the right to challenge or seek modifications to, or waivers
from, such protocols. APS shall file changes to its existing OATT consistent
with this section within ten (10) days of Commission approval of this Agreement
pursuant to Section 6.1.

      7.7. Within thirty (30) days of Commission approval of this Agreement
pursuant to Section 6.1, APS shall serve on the Parties an Interim Code of
Conduct to address inter-affiliate relationships involving APS as a utility
distribution company. APS shall voluntarily comply with this Interim Code of
Conduct until the Commission approves a code of conduct for APS in accordance
with the Electric Competition Rules that is concurrently effective with codes of
conduct for all other Affected Utilities (as defined in the Electric Competition
Rules). APS shall meet and confer with the Parties prior to serving its Interim
Code of Conduct.

      7.8.  In the event of any  disagreement  over the  interpretation  of this
Agreement or the implementation of any of the provisions of this Agreement,  the
Parties shall  promptly  convene a conference and in good faith shall attempt to
resolve such disagreement.

      7.9. The obligations under this Agreement that apply for a specific term
set forth herein shall expire automatically in accordance with the term
specified and shall require no further action for their expiration.

      7.10. The Parties agree and recommend that the Commission schedule
public meetings and hearings for consideration of this Agreement. The filing of
this Agreement with the Commission shall be deemed to be the filing of a formal
request for the expeditious issuance of a procedural schedule that establishes
such formal hearings and public meetings as may be necessary for the Commission
to approve this Agreement in accordance with

                                       9

Section 6.1 and that afford interested parties adequate opportunity to comment
and be heard on the terms of this Agreement consistent with applicable legal
requirements.

DATED at Phoenix, Arizona, as of this 14th day of May, 1999.

RESIDENTIAL UTILITY                      ARIZONA PUBLIC SERVICE COMPANY
CONSUMER OFFICE

By  Greg Patterson                       By   Jack E. Davis
  -------------------------------             -------------------------------

Title Director                           Title President, Energy
     ----------------------------             -------------------------------
                                               Delivery & Sales
                                              -------------------------------

ARIZONA COMMUNITY ACTION                 (Party)
ASSOCIATION                              ------------------------------------

By  Janet Regner                          By
  -------------------------------             -------------------------------

Title Executive Director                  Title
     ----------------------------              ------------------------------


ARIZONANS FOR ELECTRIC CHOICE AND         (Party)
COMPETITION,* a coalition of companies     ------------------------------------
and associations in support of
competition that includes Cable Systems
International, BHP Copper, Motorola,      By
Chemical Lime, Intel, Honeywell,              -------------------------------
Allied Signal, Cyprus Climax Metals,
Asarco, Phelps Dodge, Homebuilders        Title
of Central Arizona, Arizona Mining             ------------------------------
Industry Gets Our Support, Arizona
Food Marketing Alliance, Arizona
Association of Industries, Arizona
Multi-housing Association, Arizona Rock
Products Association, Arizona Restaurant  (Party)
Association, and Arizona Retailers        ----------------------------------
Association.

By Peter A. Woog                           By
  -------------------------------            -------------------------------

Title Chairman                             Title
     ----------------------------               ----------------------------

* Enron is not a signatory to this Agreement.

* Also included: Boeing, AZ School Board Association, National Federation of
Independent Business (NFIB), AZ Hospital Association, Lockheed Martin, Abbot
Labs, Raytheon
                                       10

(Party)                                    (Party)
- ---------------------------------          ---------------------------------

By                                         By
  -------------------------------            -------------------------------

Title                                      Title
     ----------------------------               ----------------------------


(Party)                                    (Party)
- ---------------------------------          ---------------------------------

By                                         By
  -------------------------------            -------------------------------

Title                                      Title
     ----------------------------               ----------------------------


(Party)                                    (Party)
- ---------------------------------          ---------------------------------

By                                         By
  -------------------------------            -------------------------------

Title                                      Title
     ----------------------------               ----------------------------


(Party)                                    (Party)
- ---------------------------------          ---------------------------------

By                                         By
  -------------------------------            -------------------------------

Title                                      Title
     ----------------------------               ----------------------------

                                       11

                                                                       EXHIBIT A
                                                                         5/10/99
                                                                           DA-R1
                             ELECTRIC DELIVERY RATES


ARIZONA PUBLIC SERVICE COMPANY                      A.C.C. No. XXXX
Phoenix, Arizona                                    Tariff or Schedule No. DA-R1
Filed by:  Alan Propper                             Original Tariff
Title:  Director, Pricing and Regulation            Effective:  XXX  XX, 1999

                                  DIRECT ACCESS
                               RESIDENTIAL SERVICE

AVAILABILITY

         This rate schedule is available in all certificated retail delivery
service territory served by Company and where facilities of adequate capacity
and the required phase and suitable voltage are adjacent to the premises served.

APPLICATION

         This rate schedule is applicable to customers receiving electric energy
on a direct access basis from any certificated Electric Service Provider (ESP)
as defined in A.A.C. R14-2-1603. This rate schedule is applicable only to
electric delivery required for residential purposes in individual private
dwellings and in individually metered apartments when such service is supplied
at one point of delivery and measured through one meter. For those dwellings and
apartments where electric service has historically been measured through two
meters, when one of the meters was installed pursuant to a water heating or
space heating rate schedule no longer in effect, the electric service measured
by such meters shall be combined for billing purposes.

         This rate schedule shall become effective as defined in Company's Terms
and Conditions for Direct Access (Schedule #10.)

TYPE OF SERVICE

         Service shall be single phase, 60 Hertz, at one standard voltage
(120/240 or 120/208 as may be selected by customer subject to availability at
the customer's premise). Three phase service is furnished under the Company's
Conditions Governing Extensions of Electric Distribution Lines and Services
(Schedule #3). Transformation equipment is included in cost of extension. Three
phase service is required for motors of an individual rated capacity of 7 1/2 HP
or more.

METERING REQUIREMENTS

         All customers shall comply with the terms and conditions for load
profiling or hourly metering specified in Schedule #10.

MONTHLY BILL

         The monthly bill shall be the greater of the amount computed under A.
or B. below, including the applicable Adjustments.

         A. RATE

         May - October Billing Cycles (Summer):

                       Basic                              Competitive
                     Delivery                  System     Transition
                      Service   Distribution   Benefits     Charge
                      -------   ------------   --------     ------
          $/month     $10.00

          All kWh                $0.04158    $0.00115    $0.00930

         November - April Billing Cycles (Winter):

                       Basic                              Competitive
                     Delivery                   System     Transition
                      Service   Distribution   Benefits     Charge
                      -------   ------------   --------     ------
          $/month     $10.00

          All kWh                $0.03518    $0.00115    $0.00930

         B.  MINIMUM       $ 10.00 per month


                           (CONTINUED ON REVERSE SIDE)

                                                                           DA-R1
                                                                 A.C.C. No. XXXX
                                                                     Page 2 of 2

      ADJUSTMENTS

      1.    When Metering, Meter Reading or Consolidated Billing are provided by
            the Customer's ESP, the monthly bill will be credited as follows:

                  Meter             $1.30 per month
                  Meter Reading     $0.30 per month
                  Billing           $0.30 per month

      2.    The monthly bill is also subject to the applicable proportionate
            part of any taxes, or governmental impositions which are or may in
            the future be assessed on the basis of gross revenues of the Company
            and/or the price or revenue from the electric service sold and/or
            the volume of energy delivered or purchased for sale and/or sold
            hereunder.

SERVICES ACQUIRED FROM CERTIFICATED ELECTRIC SERVICE PROVIDERS

         Customers served under this rate schedule are responsible for acquiring
their own generation and any other required competitively supplied services from
an ESP. The Company will provide and bill its transmission and ancillary
services on rates approved by the Federal Energy Regulatory Commission to the
Scheduling Coordinator who provides transmission service to the Customer's ESP.
The Customer's ESP must submit a Direct Access Service Request pursuant to the
terms and conditions in Schedule #10.

ON-SITE GENERATION TERMS AND CONDITIONS

         Customers served under this rate schedule who have on-site generation
connected to the Company's electrical delivery grid shall enter into an
Agreement for Interconnection with the Company which shall establish all
pertinent details related to interconnection and other required service
standards. The Customer does not have the option to sell power and energy to the
Company under this tariff.

TERMS AND CONDITIONS

         This rate schedule is subject to the Company's Terms and Conditions for
Standard Offer and Direct Access Services (Schedule #1) and Schedule #10. These
schedules have provisions that may affect customer's monthly bill.

                                                                       EXHIBIT A
                                                                         5/10/99
                                                                          DA-GS1
                             ELECTRIC DELIVERY RATES


ARIZONA PUBLIC SERVICE COMPANY                     A.C.C. No. XXXX
Phoenix, Arizona                                   Tariff or Schedule No. DA-GS1
Filed by:  Alan Propper                            Original Tariff
Title:  Director, Pricing and Regulation           Effective: XXX  XX, 1999

                                  DIRECT ACCESS
                                 GENERAL SERVICE

AVAILABILITY

         This rate schedule is available in all certificated retail delivery
service territory served by Company at all points where facilities of adequate
capacity and the required phase and suitable voltage are adjacent to the
premises served.

APPLICATION

         This rate schedule is applicable to customers receiving electric energy
on a direct access basis from any certificated Electric Service Provider (ESP)
as defined in A.A.C. R14-2-1603. This rate schedule is applicable to all
electric service required when such service is supplied at one point of delivery
and measured through one meter. For those customers whose electricity is
delivered through more than one meter, service for each meter shall be computed
separately under this rate unless conditions in accordance with the Company's
Schedule #4 (Totalized Metering of Multiple Service Entrance Sections At a
Single Premise for Standard Offer and Direct Access Service) are met. For those
service locations where electric service has historically been measured through
two meters, when one of the meters was installed pursuant to a water heating
rate schedule no longer in effect, the electric service measured by such meters
shall be combined for billing purposes.

         This rate schedule shall become effective as defined in Company's Terms
and Conditions for Direct Access (Schedule #10).

         This rate schedule is not applicable to residential service, resale
service or direct access service which qualifies for Rate Schedule DA-GS10.

TYPE OF SERVICE

         Service shall be single or three phase, 60 Hertz, at one standard
voltage as may be selected by customer subject to availability at the customer's
premise. Three phase service is furnished under the Company's Conditions
Governing Extensions of Electric Distribution Lines and Services (Schedule #3).
Transformation equipment is included in cost of extension. Three phase service
is not furnished for motors of an individual rated capacity of less than 7 1/2
HP, except for existing facilities or where total aggregate HP of all connected
three phase motors exceed 12 HP. Three phase service is required for motors of
an individual rated capacity of more than 7 1/2 HP.

METERING REQUIREMENTS

         All customers shall comply with the terms and conditions for load
profiling or hourly metering specified in the Company's Schedule #10.

MONTHLY BILL

         The monthly bill shall be the greater of the amount computed under A.
or B. below, including the applicable Adjustments.

         A.  RATE


         June - October Billing Cycles (Summer):

                              Basic                               Competitive
                             Delivery                   System    Transition
                             Service    Distribution    Benefits    Charge
                             -------    ------------    --------    ------

            $/month           $12.50

            Per kW over 5                 $0.721

            Per kWh for the
            first 2,500 kWh              $0.04255

            Per kWh for the
            next 100 kWh per
            kW over 5                    $0.04255

            Per kWh for the
            next 42,000 kWh              $0.02901

            Per kWh for all
            additional kWh               $0.01811

            Per all kWh                                 $0.00115

            Per all kW                                               $2.43

                           (CONTINUED ON REVERSE SIDE)


                                                                          DA-GS1
                                                                 A.C.C. No. XXXX
                                                                     Page 2 of 3

         A.  RATE (continued)

         November - May Billing Cycles (Winter):

                              Basic                               Competitive
                             Delivery                   System    Transition
                             Service    Distribution    Benefits    Charge
                             -------    ------------    --------    ------

            $/month           $12.50

            Per kW over 5                 $0.652

            Per kWh for the
            first 2,500 kWh              $0.03827

            Per kWh for the
            next 100 kWh per
            kW over 5                    $0.03827

            Per kWh for the
            next 42,000 kWh              $0.02600

            Per kWh for all
            additional kWh               $0.01614

            Per all kWh                                 $0.00115

            Per all kW                                               $2.43


          PRIMARY AND TRANSMISSION LEVEL SERVICE:

          1.   For customers served at primary voltage (12.5kV to below 69kV),
               the Distribution charge will be discounted by 11.6%.
          2.   For customers served at transmission voltage (69kV or higher),
               the Distribution charge will be discounted 52.6%.
          3.   Pursuant to A.A.C. R14-2-1612.K.11, the Company shall retain
               ownership of Current Transformers (CT's) and Potential
               Transformers (PT's) for those customers taking service at voltage
               levels of more than 25kV. For customers whose metering services
               are provided by an ESP, a monthly facilities charge will be
               billed, in addition to all other applicable charges shown above,
               as determined in the service contract based upon the Company's
               cost of CT and PT ownership, maintenance and operation.

          DETERMINATION OF KW

          The kW used for billing purposes shall be the average kW supplied
          during the 15-minute period of maximum use during the month, as
          determined from readings of the delivery meter.

     B. MINIMUM

          $12.50 plus $1.74 for each kW in excess of five of either the highest
          kW established during the 12 months ending with the current month or
          the minimum kW specified in the agreement for service, whichever is
          the greater.

     ADJUSTMENTS

     1.   When Metering, Meter Reading or Consolidated Billing are provided by
          the Customer's ESP, the monthly bill will be credited as follows:
              Meter         $4.00 per month
              Meter Reading $0.30 per month
              Billing       $0.30 per month

     2.   The monthly bill is also subject to the applicable proportionate part
          of any taxes, or governmental impositions which are or may in the
          future be assessed on the basis of gross revenues of the Company
          and/or the price or revenue from the electric service sold and/or the
          volume of energy delivered or purchased for sale and/or sold
          hereunder.

SERVICES ACQUIRED FROM CERTIFICATED ELECTRIC SERVICE PROVIDERS

         Customers served under this rate schedule are responsible for acquiring
their own generation and any other required competitively supplied services from
an ESP or under the Company's Open Access Transmission Tariff. The Company will
provide and bill its transmission and ancillary services on rates approved by
the Federal Energy Regulatory Commission to the Scheduling Coordinator who
provides transmission service to the Customer's ESP. The Customer's ESP must
submit a Direct Access Service Request pursuant to the terms and conditions in
Schedule #10.

                              (CONTINUED ON PAGE 3)

                                                                          DA-GS1
                                                                 A.C.C. No. XXXX
                                                                     Page 3 of 3
ON-SITE GENERATION TERMS AND CONDITIONS

         Customers served under this rate schedule who have on-site generation
connected to the Company's electrical delivery grid shall enter into an
Agreement for Interconnection with the Company which shall establish all
pertinent details related to interconnection and other required service
standards. The Customer does not have the option to sell power and energy to the
Company under this tariff.

CONTRACT PERIOD

    0 - 1,999 kW:       As provided in Company's standard agreement for service.
    2,000 kW and above: Three (3) years, or longer, at Company's option for
                        initial period when construction is required. One
                        (1) year, or longer, at Company's option when
                        construction is not required.

TERMS AND CONDITIONS

         This rate schedule is subject to Company's Terms and Conditions for
Standard Offer and Direct Access Service (Schedule #1) and the Company's
Schedule #10. These Schedules have provisions that may affect customer's monthly
bill.

                                                                       EXHIBIT A
                                                                         5/10/99
                                                                         DA-GS10
                             ELECTRIC DELIVERY RATES


ARIZONA PUBLIC SERVICE COMPANY                    A.C.C. No. XXXX
Phoenix, Arizona                                  Tariff or Schedule No. DA-GS10
Filed by:  Alan Propper                           Original Tariff
Title:  Director, Pricing and Regulation          Effective:  XXX  XX, 1999

                                  DIRECT ACCESS
                           EXTRA LARGE GENERAL SERVICE

AVAILABILITY

         This rate schedule is available in all certificated retail delivery
service territory served by Company at all points where facilities of adequate
capacity and the required phase and suitable voltage are adjacent to the
premises served.

APPLICATION

         This rate schedule is applicable to customers receiving electric energy
on a direct access basis from any certificated Electric Service Provider (ESP)
as defined in A.A.C. R14-2-1603. This rate schedule is applicable only to
customers whose monthly maximum demand is 3,000 kW or more for three (3)
consecutive months in any continuous twelve (12) month period ending with the
current month. Service must be supplied at one point of delivery and measured
through one meter unless otherwise specified by individual customer contract.
For those customers whose electricity is delivered through more than one meter,
service for each meter shall be computed separately under this rate unless
conditions in accordance with the Company's Schedule #4 (Totalized Metering of
Multiple Service Entrance Sections At a Single Premise for Standard Offer and
Direct Access Service) are met.

         This rate schedule is not applicable to resale service.

         This rate schedule shall become effective as defined in Company's Terms
and Conditions for Direct Access (Schedule #10).

TYPE OF SERVICE

         Service shall be three phase, 60 Hertz, at Company's standard voltages
that are available within the vicinity of customer's premise.

METERING REQUIREMENTS

         All customers shall comply with the terms and conditions for hourly
metering specified in Schedule #10.

MONTHLY BILL

         The monthly bill shall be the greater of the amount computed under A.
or B. below, including the applicable Adjustments.

         A. RATE

                      Basic                               Competitive
                    Delivery                    System    Transition
                     Service    Distribution    Benefits     Charge
                     -------    ------------    --------     ------

          $/month   $2,430.00

          per kW                   $3.53                      $2.82

          per kWh                $0.00999       $0.00115

         PRIMARY AND TRANSMISSION LEVEL SERVICE:

            1.    For customers served at primary voltage (12.5kV to below
                  69kV), the Distribution charge will be discounted by 4.8%.

            2.    For customers served at transmission voltage (69kV or higher),
                  the Distribution charge will be discounted 36.7%.

            3.    Pursuant to A.A.C. R14-2-1612.K.11, the Company shall retain
                  ownership of Current Transformers (CT's) and Potential
                  Transformers (PT's) for those customers taking service at
                  voltage levels of more than 25 kV. For customers whose
                  metering services are provided by an ESP, a monthly facilities
                  charge will be billed, in addition to all other applicable
                  charges shown above, as determined in the service contract
                  based upon the Company's cost of CT and PT ownership,
                  maintenance and operation.

         DETERMINATION OF KW

         The kW used for billing purposes shall be the greater of:

            1.    The kW used for billing purposes shall be the average kW
                  supplied during the 15minute period (or other period as
                  specified by individual customer's contract) of maximum use
                  during the month, as determined from readings of the delivery
                  meter.

            2.    The minimum kW specified in the agreement for service or
                  individual customer contract.

                           (CONTINUED ON REVERSE SIDE)


                                                                         DA-GS10
                                                                 A.C.C. No. XXXX
                                                                     Page 2 of 2

         B. MINIMUM

         $2,430.00 per month plus $1.74 per kW per month.

         ADJUSTMENTS

            1.    When Metering, Meter Reading or Consolidated Billing are
                  provided by the Customer's ESP, the monthly bill will be
                  credited as follows:

                      Meter         $ 55.00 per month
                      Meter Reading $  0.30 per month
                      Billing       $  0.30 per month

            2.    The monthly bill is also subject to the applicable
                  proportionate part of any taxes, or governmental impositions
                  which are or may in the future be assessed on the basis of
                  gross revenues of the Company and/or the price or revenue from
                  the electric service sold and/or the volume of energy
                  delivered or purchased for sale and/or sold hereunder.

SERVICES ACQUIRED FROM CERTIFICATED ELECTRIC SERVICE PROVIDERS

         Customers served under this rate schedule are responsible for acquiring
their own generation and any other required competitively supplied services from
an ESP. T he Company will provide and bill its transmission and ancillary
services on rates approved by the Federal Energy Regulatory Commission to the
Scheduling Coordinator who provides transmission service to the Customer's ESP.
The Customer's ESP must submit a Direct Access Service Request pursuant to the
terms and conditions in Schedule #10.

ON-SITE GENERATION TERMS AND CONDITIONS

         Customers served under this rate schedule who have on-site generation
connected to the Company's electrical delivery grid shall enter into an
Agreement for Interconnection with the Company which shall establish all
pertinent details related to interconnection and other required service
standards. The Customer does not have the option to sell power and energy to the
Company under this tariff.

CONTRACT PERIOD

         For service locations in:

            a)    Isolated Areas: Ten (10) years, or longer, at Company's
                  option, with standard seven (7) year termination period.

            b)    Other Areas: Three (3) years, or longer, at Company's option.

TERMS AND CONDITIONS

         This rate schedule is subject to Company's Terms and Conditions for
Standard Offer and Direct Access Service (Schedule #1) and the Company's
Schedule #10. These schedules have provisions that may affect customer's monthly
bill.

                                                                       EXHIBIT A
                                                                         5/13/99
                                                                         DA-GS11
                             ELECTRIC DELIVERY RATES


ARIZONA PUBLIC SERVICE COMPANY                    A.C.C. No. XXXX
Phoenix, Arizona                                  Tariff or Schedule No. DA-GS11
Filed by:  Alan Propper                           Original Tariff
Title:  Director, Pricing and Regulation          Effective:  XXX XX, 1999

                                  DIRECT ACCESS
                                 RALSTON PURINA

AVAILABILITY

         This rate schedule is available in all certificated retail delivery
service territory served by Company at all points where facilities of adequate
capacity and the required phase and suitable voltage are adjacent to the
premises served.

APPLICATION

         This rate schedule is applicable only to Ralston Purina (Site
#863970289) when it receives electric energy on a direct access basis from any
certificated Electric Service Provider (ESP) as defined in A.A.C. R14-2-1603.
Service must be supplied as specified by individual customer contract and the
Company's Schedule #4 (Totalized Metering of Multiple Service Entrance Sections
At a Single Premise for Standard Offer and Direct Access Service).

         This rate schedule is not applicable to resale service.

         This rate schedule shall become effective as defined in Company's Terms
and Conditions for Direct Access (Schedule #10).

TYPE OF SERVICE

         Service shall be three phase, 60 Hertz, at 12.5 kV.

METERING REQUIREMENTS

         Customer shall comply with the terms and conditions for hourly metering
specified in Schedule #10.

MONTHLY BILL

         The monthly bill shall be the greater of the amount computed under A.
or B. below, including the applicable Adjustments.

      A.    RATE

                          Basic                                  Competitive
                         Delivery                     System     Transition
                         Service     Distribution    Benefits      Charge
                         -------     ------------    --------      ------
              $/month   $2,430.00

              per kW                    $2.58                       $1.86

              per kWh                  $0.00732      $0.00115


                  DETERMINATION OF KW

                  The kW used for billing purposes shall be the greater of:

                  1.    The kW used for billing purposes shall be the average kW
                        supplied during the 15minute period (or other period as
                        specified by individual customer's contract) of maximum
                        use during the month, as determined from readings of the
                        delivery meter.

                  2.    The minimum kW specified in the agreement for service or
                        individual customer contract.

      B.    MINIMUM

         $2,430.00 per month plus $1.74 per kW per month.

      ADJUSTMENTS

      1.    When Metering, Meter Reading or Consolidated Billing are provided by
            the Customer's ESP, the monthly bill will be credited as follows:
                      Meter         $ 55.00 per month
                      Meter Reading $  0.30 per month
                      Billing       $  0.30 per month

      2.    The monthly bill is also subject to the applicable proportionate
            part of any taxes, or governmental impositions which are or may in
            the future be assessed on the basis of gross revenues of the Company
            and/or the price or revenue from the electric service sold and/or
            the volume of energy delivered or purchased for sale and/or sold
            hereunder.

                           (CONTINUED ON REVERSE SIDE)

                                                                         DA-GS11
                                                                 A.C.C. No. XXXX
                                                                     Page 2 of 2

SERVICES ACQUIRED FROM CERTIFICATED ELECTRIC SERVICE PROVIDERS

         Customer is responsible for acquiring its own generation and any other
required competitively supplied services from an ESP. T he Company will provide
and bill its transmission and ancillary services on rates approved by the
Federal Energy Regulatory Commission to the Scheduling Coordinator who provides
transmission service to the Customer's ESP. The Customer's ESP must submit a
Direct Access Service Request pursuant to the terms and conditions in Schedule
#10.

ON-SITE GENERATION TERMS AND CONDITIONS

         If Customer has on-site generation connected to the Company's
electrical delivery grid, it shall enter into an Agreement for Interconnection
with the Company which shall establish all pertinent details related to
interconnection and other required service standards. The Customer does not have
the option to sell power and energy to the Company under this tariff.

TERMS AND CONDITIONS

         This rate schedule is subject to Company's Terms and Conditions for
Standard Offer and Direct Access Service (Schedule #1) and the Company's
Schedule #10. These schedules have provisions that may affect customer's monthly
bill.

                                                                       EXHIBIT A
                                                                         5/13/99
                                                                         DA-GS12
                             ELECTRIC DELIVERY RATES


ARIZONA PUBLIC SERVICE COMPANY                    A.C.C. No. XXXX
Phoenix, Arizona                                  Tariff or Schedule No. DA-GS12
Filed by:  Alan Propper                           Original Tariff
Title:  Director, Pricing and Regulation          Effective:  XXX  XX, 1999

                                  DIRECT ACCESS
                                   BHP COPPER

AVAILABILITY

         This rate schedule is available in all certificated retail delivery
service territory served by Company at all points where facilities of adequate
capacity and the required phase and suitable voltage are adjacent to the
premises served.

APPLICATION

         This rate schedule is applicable only to BHP Copper (Site #774932285)
when it receives electric energy on a direct access basis from any certificated
Electric Service Provider (ESP) as defined in A.A.C. R14-2-1603. Service must be
supplied as specified by individual customer contract and the Company's Schedule
#4 (Totalized Metering of Multiple Service Entrance Sections At a Single Premise
for Standard Offer and Direct Access Service).

         This rate schedule is not applicable to resale service.

         This rate schedule shall become effective as defined in Company's Terms
and Conditions for Direct Access (Schedule #10).

TYPE OF SERVICE

         Service shall be three phase, 60 Hertz, at 12.5 kV or higher.

METERING REQUIREMENTS

         Customer shall comply with the terms and conditions for hourly metering
specified in Schedule #10.

MONTHLY BILL

         The monthly bill shall be the greater of the amount computed under A.
or B. below, including the applicable Adjustments.

         A. RATE


                 Basic    Distribution    Distribution               Competitive
               Delivery   at Primary    at Transmission   System     Transition
                Service     Voltage         Voltage       Benefits     Charge
                -------     -------         -------       --------     ------

     $/month   $2,430.00

     per kW                  $2.35           $1.22                      $1.54

     per kWh               $0.00665        $0.00346       $0.00115


            PRIMARY AND TRANSMISSION LEVEL SERVICE:

                  Pursuant to A.A.C. R14-2-1612.K.11, the Company shall retain
                  ownership of Current Transformers (CT's) and Potential
                  Transformers (PT's) for those customers taking service at
                  voltage levels of more than 25 kV. For customers whose
                  metering services are provided by an ESP, a monthly facilities
                  charge will be billed, in addition to all other applicable
                  charges shown above, as determined in the service contract
                  based upon the Company's cost of CT and PT ownership,
                  maintenance and operation.

            DETERMINATION OF KW

                  The kW used for billing purposes shall be the greater of:

            1.    The kW used for billing purposes shall be the average kW
                  supplied during the 30minute period (or other period as
                  specified by individual customer's contract) of maximum use
                  during the month, as determined from readings of the delivery
                  meter.

            2.    The minimum kW specified in the agreement for service or
                  individual customer contract.

         B. MINIMUM

            $2,430.00 per month plus $1.74 per kW per month.

                           (CONTINUED ON REVERSE SIDE)

                                                                         DA-GS12
                                                                 A.C.C. No. XXXX
                                                                     Page 2 of 2

            ADJUSTMENTS

            1.    When Metering, Meter Reading or Consolidated Billing are
                  provided by the Customer's ESP, the monthly bill will be
                  credited as follows:

                      Meter         $ 55.00 per month
                      Meter Reading $  0.30 per month
                      Billing       $  0.30 per month

            2.    The monthly bill is also subject to the applicable
                  proportionate part of any taxes, or governmental impositions
                  which are or may in the future be assessed on the basis of
                  gross revenues of the Company and/or the price or revenue from
                  the electric service sold and/or the volume of energy
                  delivered or purchased for sale and/or sold hereunder.

SERVICES ACQUIRED FROM CERTIFICATED ELECTRIC SERVICE PROVIDERS

         Customer is responsible for acquiring its own generation and any other
required competitively supplied services from an ESP. T he Company will provide
and bill its transmission and ancillary services on rates approved by the
Federal Energy Regulatory Commission to the Scheduling Coordinator who provides
transmission service to the Customer's ESP. The Customer's ESP must submit a
Direct Access Service Request pursuant to the terms and conditions in Schedule
#10.

ON-SITE GENERATION TERMS AND CONDITIONS

         If Customer has on-site generation connected to the Company's
electrical delivery grid, it shall enter into an Agreement for Interconnection
with the Company which shall establish all pertinent details related to
interconnection and other required service standards. The Customer does not have
the option to sell power and energy to the Company under this tariff.

TERMS AND CONDITIONS

         This rate schedule is subject to Company's Terms and Conditions for
Standard Offer and Direct Access Service (Schedule #1) and the Company's
Schedule #10. These schedules have provisions that may affect customer's monthly
bill.

                                                                       EXHIBIT A
                                                                         5/13/99
                                                                         DA-GS13
                             ELECTRIC DELIVERY RATES


ARIZONA PUBLIC SERVICE COMPANY                    A.C.C. No. XXXX
Phoenix, Arizona                                  Tariff or Schedule No. DA-GS13
Filed by:  Alan Propper                           Original Tariff
Title:  Director, Pricing and Regulation          Effective:  XXX  XX, 1999

                                  DIRECT ACCESS
                                  CYPRUS BAGDAD

AVAILABILITY

         This rate schedule is available in all certificated retail delivery
service territory served by Company at all points where facilities of adequate
capacity and the required phase and suitable voltage are adjacent to the
premises served.

APPLICATION

         This rate schedule is applicable only to Cyprus Bagdad (Site
#120932284) when it receives electric energy on a direct access basis from any
certificated Electric Service Provider (ESP) as defined in A.A.C. R14-2-1603.
Service must be supplied as specified by individual customer contract and the
Company's Schedule #4 (Totalized Metering of Multiple Service Entrance Sections
At a Single Premise for Standard Offer and Direct Access Service).

         This rate schedule is not applicable to resale service.

         This rate schedule shall become effective as defined in Company's Terms
and Conditions for Direct Access (Schedule #10).

TYPE OF SERVICE

         Service shall be three phase, 60 Hertz, at 115 kV or higher.

METERING REQUIREMENTS

         Customer shall comply with the terms and conditions for hourly metering
specified in Schedule #10.

MONTHLY BILL

         The monthly bill shall be the greater of the amount computed under A.
or B. below, including the applicable Adjustments.

         A. RATE

                      Basic                                 Competitive
                    Delivery                      System    Transition
                     Service     Distribution    Benefits     Charge
                     -------     ------------    --------     ------

          $/month   $2,430.00

          per kW                    $1.05                      $1.34

          per kWh                 $0.00298       $0.00115


            PRIMARY AND TRANSMISSION LEVEL SERVICE:

                  Pursuant to A.A.C. R14-2-1612.K.11, the Company shall retain
                  ownership of Current Transformers (CT's) and Potential
                  Transformers (PT's) for those customers taking service at
                  voltage levels of more than 25 kV. For customers whose
                  metering services are provided by an ESP, a monthly facilities
                  charge will be billed, in addition to all other applicable
                  charges shown above, as determined in the service contract
                  based upon the Company's cost of CT and PT ownership,
                  maintenance and operation.

            DETERMINATION OF KW

            The kW used for billing purposes shall be the greater of:

            1.    The kW used for billing purposes shall be the average kW
                  supplied during the 30minute period (or other period as
                  specified by individual customer's contract) of maximum use
                  during the month, as determined from readings of the delivery
                  meter.

            2.    The minimum kW specified in the agreement for service or
                  individual customer contract.

         B. MINIMUM

         $2,430.00 per month plus $1.74 per kW per month, until June 30, 2004
when this minimum will no longer be applicable.

                           (CONTINUED ON REVERSE SIDE)

                                                                         DA-GS13
                                                                 A.C.C. No. XXXX
                                                                     Page 2 of 2

            ADJUSTMENTS

            1.    When Metering, Meter Reading or Consolidated Billing are
                  provided by the Customer's ESP, the monthly bill will be
                  credited as follows:

                      Meter         $ 55.00 per month
                      Meter Reading $  0.30 per month
                      Billing       $  0.30 per month

            2.    The monthly bill is also subject to the applicable
                  proportionate part of any taxes, or governmental impositions
                  which are or may in the future be assessed on the basis of
                  gross revenues of the Company and/or the price or revenue from
                  the electric service sold and/or the volume of energy
                  delivered or purchased for sale and/or sold hereunder.

SERVICES ACQUIRED FROM CERTIFICATED ELECTRIC SERVICE PROVIDERS

         Customer is responsible for acquiring its own generation and any other
required competitively supplied services from an ESP. T he Company will provide
and bill its transmission and ancillary services on rates approved by the
Federal Energy Regulatory Commission to the Scheduling Coordinator who provides
transmission service to the Customer's ESP. The Customer's ESP must submit a
Direct Access Service Request pursuant to the terms and conditions in Schedule
#10.

ON-SITE GENERATION TERMS AND CONDITIONS

         If Customer has on-site generation connected to the Company's
electrical delivery grid, it shall enter into an Agreement for Interconnection
with the Company which shall establish all pertinent details related to
interconnection and other required service standards. The Customer does not have
the option to sell power and energy to the Company under this tariff.

TERMS AND CONDITIONS

         This rate schedule is subject to Company's Terms and Conditions for
Standard Offer and Direct Access Service (Schedule #1) and the Company's
Schedule #10. These schedules have provisions that may affect customer's monthly
bill.

ARIZONA PUBLIC SERVICE COMPANY                                        Exhibit A
Competitive Transition Charges                                        5/13/99
By Direct Access Rate Classes                                         Schedule A


Line                                           Competition Transition Charges Effective January 1 of
- ----                                        ------------------------------------------------------------
 #        Direct Access Rate Class          1999       2000        2001       2002       2003       2004
- ----      ------------------------          ----       ----        ----       ----       ----       ----
                                                                              
 1   Residential, DA-R1 (per kWh)          $0.0093    $0.0084    $0.0063    $0.0056    $0.0050    $0.0036
 2   Under 3 mW, DA-GS1, (per kW/mo.)      $  2.43    $  2.20    $  1.66    $  1.46    $  1.30    $  0.94
 3   3 mW and Above, DA-GS10 (per kW/mo.)  $  2.82    $  2.55    $  1.89    $  1.72    $  1.51    $  1.09
 4   BHP Copper (per kW/mo.)               $  1.54    $  1.53    $  1.06    $  0.95    $  0.83    $  0.61
 5   Cyprus Copper (per kW/mo.)            $  1.34    $  1.46    $  1.05    $  0.94    $  0.82    $  0.61
 6   Ralston Purina (per kW/mo.)           $  1.86    $  1.98    $  1.50    $  1.34    $  1.18    $  0.87

 7   Average Retail (per kWh)              $0.0067    $0.0061    $0.0054    $0.0048    $0.0043    $0.0031


Charges are based upon recovery of $350 million NPV derived from APS' Compliance
Filing of 8/21/98 as adjusted to synchronize Direct Access and Standard Offer
revenue decreases.

ARIZONA PUBLIC SERVICE COMPANY                                        Exhibit A
Distribution Charges                                                  5/13/99
By Direct Access Rate Classes                                         Schedule B


                                                                   Distribution Charges Effective January 1 of
 Line                                                     ------------------------------------------------------------
  #           Direct Access Rate Class                    1999       2000       2001      2002        2003      2004a/
 ----         ------------------------                    ----       ----       ----      ----        ----      ------
                                                                                             
       RESIDENTIAL, DA-R1
  1           Summer per kWh                            $0.04158   $0.04041   $0.03934   $0.03837   $0.03748   $0.03689
  2           Winter per kWh                            $0.03518   $0.03419   $0.03329   $0.03247   $0.03172   $0.03122

       DA-GS1 (UNDER 3 MW)
         Summer Rates
  3        per kW for all kW over 5                     $0.721     $0.691     $  0.663   $  0.638    $ 0.615   $  0.600
  4        per kWh for the first 2,500 kWh              $0.04255   $0.04075   $0.03912   $0.03763   $0.03627   $0.03537
  5        per kWh for the next 100 kWh per kW over 5   $0.04255   $0.04075   $0.03912   $0.03763   $0.03627   $0.03537
  6        per kWh for the next 42,000 kWh              $0.02901   $0.02779   $0.02667   $0.02565   $0.02473   $0.02411
  7        per kWh for all additional kWh               $0.01811   $0.01735   $0.01665   $0.01602   $0.01544   $0.01506
         Winter Rates
  8        per kW for all kW over 5                     $0.652     $  0.624   $   0.599  $  0.576    $ 0.555   $  0.541
  9        per kWh for the first 2,500 kWh              $0.03827   $0.03666   $0.03519   $0.03385   $0.03263   $0.03182
  10       per kWh for the next 100 kWh per kW over 5   $0.03827   $0.03666   $0.03519   $0.03385   $0.03263   $0.03182
  11       per kWh for the next 42,000 kWh              $0.02600   $0.02490   $0.02390   $0.02299   $0.02216   $0.02161
  12       per kWh for all additional kWh               $0.01614   $0.01546   $0.01484   $0.01427   $0.01376   $0.01342
         Voltage Discounts
  13       Primary Voltage                                  11.6%      12.1%      12.6%      13.1%      13.6%      13.9%
  14       Transmission Voltage                             52.6%      54.9%      57.2%      59.5%      61.7%      63.3%

       DA-GS10 (3 MW AND ABOVE)
  15       per kW                                       $   3.53   $   3.33   $   3.15   $   2.98   $   2.83   $   2.73
  16       per kWh                                      $0.00999   $0.00943   $0.00892   $0.00845   $0.00802   $0.00774
          Voltage Discounts
  17       Primary Voltage Discount                          4.8%       5.1%       5.3%       5.6%       5.9%       6.2%
  18       Transmission Voltage Discount                    36.7%      38.9%      41.1%      43.4%      45.8%      47.4%

       DA-GS11 (RALSTON PURINA)
  19       per kW                                       $   2.58   $   2.71   $   2.57   $   2.44   $   2.32   $   2.25
  20       per kWh                                      $0.00732   $0.00767   $0.00727   $0.00691   $0.00657   $0.00635

       DA-GS12 (BHP COPPER)
  21      Primary Voltage Delivery  per kW              $   2.35   $   2.30   $   2.16   $   2.07   $   1.99   $   1.93
  22                                per kWh             $0.00665   $0.00651   $0.00611   $0.00585   $0.00561   $0.00546
  23      Transmission Voltage Delivery  per kW         $   1.22   $   1.17   $   1.03   $   0.94   $   0.85   $   0.80
  24                                     per kWh        $0.00346   $0.00332   $0.00292   $0.00266   $0.00242   $0.00227

       DA-GS13 (CYPRUS BAGDAD)
  25          per kW                                    $   1.05   $   1.21   $   1.03   $   0.94   $   0.85   $   0.80
  26          per kWh                                   $0.00297   $0.00343   $0.00292   $0.00266   $0.00242   $0.00227



a/    Transmission voltage customers will not pay Distribution Charges after
      June 30, 2004

                                                                      Exhibit A
                                                                      5/14/99
                                                                      Schedule C

                         ARIZONA PUBLIC SERVICE COMPANY
                     Regulatory Asset Amortization Schedule
                             (Millions of Dollars)


                                                      1/1 - 6/30
   1999       2000       2001       2002      2003      2004 1/       Total 2/
   ----       ----       ----       ----      ----      -------       --------

   164        158         145       115        86         18             686



1/    Amortization ends 6/30/2004

2/    Includes the disallowance from Section 3.3



1999    Residential                                   20                 .93
        General Service less than 3MW                 20                2.43
        General Service greater than 3MW              20                2.82
        BHP Copper                                    20                1.54
        Cyprus Copper                                 20                1.34
        Ralston Purina                                20                1.86

2000    Residential                                   20                 .84
        General Service less than 3MW                 20                2.20
        General Service greater than 3MW              20                2.55
        BHP Copper                                    20                1.53
        Cyprus Copper                                 20                1.46
        Ralston Purina                                20                1.98

2001    Residential                                   100                .63
        General Service less than 3MW                 100               1.66
        General Service greater than 3MW              100               1.89
        BHP Copper                                    100               1.06
        Cyprus Copper                                 100               1.05
        Ralston Purina                                100               1.50

2002    Residential                                   100                .56
        General Service less than 3MW                 100               1.46
        General Service greater than 3MW              100               1.72
        BHP Copper                                    100                .95
        Cyprus Copper                                 100                .94
        Ralston Purina                                100               1.34

2003    Residential                                   100                .50
        General Service less than 3MW                 100               1.30
        General Service greater than 3MW              100               1.51
        BHP Copper                                    100                .83
        Cyprus Copper                                 100                .82
        Ralston Purina                                100               1.18

2004    Residential                                   100                .36
        General Service less than 3MW                 100                .94
        General Service greater than 3MW              100               1.09
        BHP Copper                                    100                .61
        Cyprus Copper                                 100                .61
        Ralston Purina                                100                .87

- ----------
1     This formula assumes no change in APS' distribution service territory. In
      the event of any material change (e.g. by purchase, sale, expansion,
      condemnation, etc.) the formula will be adjusted such that APS receives
      the same opportunity to recover the agreed upon level of costs.

2     General Service unmetered loads will have a demand calculated for CTC
      purposes based on contract energy.

3     At the end of 2004 the net present value will be calculated to compare to
      the $350 million.

                                                                          5/7/99

                                    EXHIBIT C



Generation assets include, but are not limited to, APS' interest in the
following generating stations:

         Palo Verde
         Four Corners
         Navajo
         Cholla
         Saguaro
         Ocotillo
         West Phoenix
         Yucca
         Douglas
         Childs
         Irving

Including allocated common and general plant, support assets, associated land,
fuel supplies and contracts, etc. Generation assets will not include facilities
included in APS' FERC transmission rates.

                                    EXHIBIT D
                             AFFILIATE RULES WAIVERS


R14-2-801(5) and R14-2-803, such that the term "reorganization" does not
include, and no Commission approval is required for, corporate restructuring
that does not directly involve the utility distribution company ("UDC") in the
holding company. For example, the holding company may reorganize, form, buy or
sell non-UDC affiliates, acquire or divest interests in non-UDC affiliates,
etc., without Commission approval.

R14-2-804(A)

R14-2-805(A) shall apply only to the UDC

R14-2-805(A)(2)

R14-2-805(A)(6)

R14-2-805(A)(9), (10), and (11)

                       RECISION OF PRIOR COMMISSION ORDERS

Section X.C of the "Cogeneration and Small Power Production Policy" attached to
Decision No. 52345 (July 27, 1981) regarding reporting requirements for
cogeneration information.

Decision No. 55118 (July 24, 1986) - Page 15, Lines 5-1/2 through 13-1/2;
Finding of Fact No. 24 relating to reporting requirements under the abolished
PPFAC.

Decision No. 55818 (December 14, 1987) in its entirety. This decision related to
APS Schedule 9 (Industrial Development Rate) which was terminated by the
Commission in Decision No. 59329 (October 11, 1995).

9th and 10th Ordering Paragraphs of Decision No. 56450 (April 13, 1989)
regarding reporting requirements under the abolished PPFAC.