PUBLIC SERVICE CO OF OKLAHOMA
424B2, 2000-11-17
ELECTRIC SERVICES
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PROSPECTUS SUPPLEMENT
(To Prospectus dated March 31, 2000)

                                  $106,000,000

                       Public Service Company of Oklahoma

                    Floating Rate Notes, Series A, Due 2002


      Interest  on the  Notes  will  accrue  at a rate  per  annum  equal to the
floating  interest rate called LIBOR,  which we describe under  "DESCRIPTION  OF
NOTES"  beginning  on  page  S-4 of this  prospectus  supplement,  plus  0.625%.
Interest will accrue from November 21, 2000 until  November 21, 2002 or the date
of earlier redemption. We will pay interest on the Notes quarterly in arrears on
February 21, May 21, August 21 and November 21 of each year,  beginning February
21, 2001.

      We may redeem some or all of the Notes on any interest  payment date on or
after November 21, 2001, at a redemption  price equal to the principal amount of
the Notes to be redeemed plus interest  accrued to the redemption date. There is
no sinking fund for the Notes.

      The Notes are unsecured,  rank equally with all of our other unsecured and
unsubordinated  indebtedness and will be effectively  subordinated to all of our
secured debt,  including  $340 million  outstanding  first  mortgage bonds as of
November 1, 2000.

      Neither the  Securities and Exchange  Commission nor any other  regulatory
body has approved or disapproved of these securities or passed upon the accuracy
or adequacy of this prospectus  supplement or the accompanying  prospectus.  Any
representation to the contrary is a criminal offense.


                                          Per Note      Total

      Initial public offering price         100%    $106,000,000
      Underwriting discount                 0.25%   $    265,000
      Proceeds, before expenses, to us     99.75%   $105,735,000

      The initial public offering price set forth above does not include accrued
interest, if any.

      The  underwriters  expect to deliver the Notes in book-entry  form through
the facilities of The Depository  Trust Company against payment in New York, New
York on November 21, 2000.
                            ----------------------

UBS Warburg LLC
                     ABN AMRO Incorporated
                                               TD Securities

Prospectus Supplement dated November 16, 2000


      You should rely only on the  information  contained in this document or to
which we have  referred you. We have not  authorized  anyone to provide you with
information that is different.  This document may only be used where it is legal
to sell these securities.  The information in this document may only be accurate
on the date of this document.

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


                                TABLE OF CONTENTS

Prospectus Supplement                                        Page


DOCUMENTS INCORPORATED BY REFERENCE...........................S-3
THE COMPANY...................................................S-3
USE OF PROCEEDS...............................................S-3
DESCRIPTION OF NOTES..........................................S-4
    General...................................................S-4
    Interest..................................................S-4
    Optional Redemption.......................................S-7
    Global Securities.........................................S-7
    Events of Default.........................................S-8
    Certain Notices...........................................S-8
UNDERWRITING..................................................S-9
LEGAL OPINIONS................................................S-10

Prospectus

WHERE YOU CAN FIND MORE INFORMATION ABOUT THIS PROSPECTUS......  2
DOCUMENTS INCORPORATED BY REFERENCE............................  2
REPORTS TO HOLDERS OF SENIOR NOTES.............................  3
FORWARD-LOOKING STATEMENTS.....................................  3
PROSPECTUS SUMMARY.............................................  5
SELECTED FINANCIAL INFORMATION.................................  6
PUBLIC SERVICE COMPANY OF OKLAHOMA.............................  7
RATIOS OF EARNINGS TO FIXED CHARGES............................  7
USE OF PROCEEDS................................................  7
DESCRIPTION OF THE SENIOR NOTES................................  7
     General...................................................  7
     Registration, Transfer, Exchange and Form.................  9
     Book-Entry Only System....................................  9
     Paying Agents............................................. 11
     Consolidation, Merger, Conveyance, Sale or Transfer....... 11
     Limitation on Liens....................................... 11
     Modification of the Senior Note Indenture................. 13
     Events of Default......................................... 13
     Defeasance................................................ 14
     Resignation or Removal of Senior Note Trustee............. 16
     No Recourse Against Others................................ 16
     Concerning the Senior Note Trustee........................ 16
LEGAL OPINIONS................................................. 16
EXPERTS........................................................ 17
PLAN OF DISTRIBUTION........................................... 17


                       DOCUMENTS INCORPORATED BY REFERENCE

      The SEC allows us to  "incorporate  by reference" the  information we file
with them,  which means that we can  disclose  important  information  to you by
referring  you to those  documents.  Information  incorporated  by  reference is
considered  to be part  of  this  prospectus  supplement  and  the  accompanying
prospectus.  Later  information  that we file  with the SEC  will  automatically
update and supersede this information. We incorporate by reference our documents
listed below and any future filings we make with the SEC under  Sections  13(a),
13(c), 14, or 15(d) of the Securities Exchange Act of 1934 until we sell all the
Notes.

o     Annual Report on Form 10-K for the year ended December 31, 1999;

o     Quarterly Reports on Form 10-Q for the quarters ended March 31, 2000, June
      30, 2000 and September 30, 2000; and

o     Current  Reports on Form 8-K dated  February 14,  2000,  June 15, 2000 and
      July 5, 2000.

      We will provide to each person,  including any beneficial  owner of Notes,
to whom a copy of this prospectus supplement and the accompanying  prospectus is
delivered, a copy of any or all of the information that has been incorporated by
reference in this prospectus supplement and the accompanying  prospectus but not
delivered with this prospectus  supplement and the accompanying  prospectus.  We
will  deliver  this  information  upon  written or oral request and provide this
information at no cost to the requester. You should direct your requests to:

Mr. G. C. Dean
American Electric Power Service Corporation
1 Riverside Plaza
Columbus, Ohio 43215
(614) 223-1000

                                   THE COMPANY

      We are a public utility engaged in the production, purchase, transmission,
distribution and sale of electricity to  approximately  491,000 retail customers
in eastern  and  southwestern  Oklahoma.  Our  principal  executive  offices are
located  at 212  East  6th  Street,  Tulsa,  Oklahoma  74119  (telephone  number
918-599-2000).  We are a subsidiary of American Electric Power Company,  Inc., a
public utility holding company, and we are a part of the American Electric Power
integrated  utility system. The executive offices of American Electric Power are
located  at  1  Riverside  Plaza,   Columbus,   Ohio  43215  (telephone   number
614-223-1000).

                                 USE OF PROCEEDS

      We  estimate  the  net  proceeds  from  the  sale  of the  Notes  will  be
approximately  $105,735,00.  We will use the net proceeds for the repayment of a
portion  of   outstanding   short-term   indebtedness.   At  November  1,  2000,
approximately  $131,300,000 of short-term  indebtedness was outstanding,  with a
blended  interest rate of 6.84%. If we do not use the net proceeds  immediately,
we may temporarily invest them in short-term interest-bearing obligations.

                              DESCRIPTION OF NOTES

      The Notes are a  separate  series of the  Senior  Notes  described  in the
accompanying  prospectus.  You should read the prospectus for a detailed summary
of additional provisions of the Notes and of the Indenture under which the Notes
are issued.  The  description of the Notes below  supplements the description of
the  Senior  Notes  contained  in  the  prospectus.   If  the  descriptions  are
inconsistent, this prospectus supplement controls. The following summary and the
description  set  forth in the  accompanying  prospectus  do not  purport  to be
complete and are subject to, and qualified in their  entirety by, all provisions
of the  Indenture.  Capitalized  terms used but not  defined in this  prospectus
supplement have the meanings given to them in the prospectus.

General

      The Notes  will  constitute  a series of our Senior  Notes,  and are to be
issued under our Indenture dated as of November 1, 2000, between us and The Bank
of New York,  as trustee.  The aggregate  principal  amount of the Notes offered
hereby is limited to  $106,000,000,  but the Indenture does not limit the amount
of other Senior  Notes that we may issue.  The Notes will mature on November 21,
2002,  the  maturity  date.  The Notes are not  entitled  to the  benefit of any
sinking  fund,  and may be redeemed  at our option only under the  circumstances
described  below  under  "--Optional  Redemption."  The  Indenture  permits  the
defeasance of the Notes upon  satisfaction  of the  conditions  described  under
"Description of the Senior Notes--Defeasance" in the accompanying prospectus.

      We will  issue  the Notes in fully  registered  form in  denominations  of
$1,000 and in $1,000 increments above $1,000.  The Bank of New York, the trustee
under the  Indenture,  will  register  transfers  and  exchanges  of the  Notes.
Principal on the Notes will be payable at the Trustee's  corporate  trust office
at 101 Barclay  Street,  New York, New York 10286.  We will initially  issue the
Notes in global form.  Please refer to "--Global  Securities" in this prospectus
supplement and "Description of the Senior  Notes--Book-Entry Only System" in the
accompanying prospectus.

      Except to the extent otherwise provided below under  "--Interest",  if any
principal, interest or other payment to be made in respect of the Notes would be
due on a day that is not a business day (as defined below),  payment may be made
on the next day that is a business  day, with the same effect as if payment were
made on the due date.

Interest

      The Notes will bear  interest at LIBOR plus  0.625%.  We will pay interest
quarterly in arrears on February  21, May 21,  August 21 and November 21 of each
year (each an "interest payment date"),  beginning February 21, 2001, and on the
maturity date. If any of the quarterly interest payment dates listed above falls
on a day that is not a business day, we will postpone the payment of interest to
the  next  succeeding  business  day  unless  that  business  day is in the next
succeeding  calendar  month,  in  which  case  interest  will  be  paid  on  the
immediately preceding business day. If we pay principal and interest on the next
succeeding business day, we will consider that payment as being made on the date
that the  payment is due to you.  Accordingly,  no  interest  will accrue on the
payment for the period from and after the interest  payment date or the maturity
date to the date we make the payment to you on the next succeeding business day.
Interest  on the Notes will be  computed  on the basis of a 360 day year for the
actual number of days elapsed.

      Interest on the Notes will accrue from, and including,  November 21, 2000,
to, and excluding, the first interest payment date and then from, and including,
the immediately  preceding interest payment date to which interest has been paid
or duly provided for to, but  excluding,  the next interest  payment date or the
maturity  date, as the case may be. We will refer to each of these periods as an
"interest period." You can calculate the amount of accrued interest that we will
pay for any interest  period by multiplying  the face amount of the Notes by the
interest  rate  applicable  for the  interest  period  divided  by 360  days and
multiplied by the number of days in the interest period.

      So long as the  payment of  interest  is not in  arrears,  we will pay the
interest  payable for any interest  payment date to the person in whose name the
note is  registered  at the close of business  on the  fifteenth  calendar  day,
whether or not a business day, immediately  preceding the interest payment date.
However,  we will pay interest on the maturity  date or on a redemption  date to
the person to whom the principal will be payable.

      When we use the term "business day," we mean any day except a Saturday,  a
Sunday or a legal holiday in The City of New York on which banking  institutions
are  authorized  or required by law,  regulation  or  executive  order to close;
provided,  that the day is also a London  business  day.  "London  Business Day"
means a day other than a Saturday or Sunday  that is not a day on which  banking
institutions  in  London,  England  and New  York,  New York are  authorized  or
obligated by law or executive  order to be closed and a day on which dealings in
deposits in U. S. dollars are transacted, or with respect to any future date are
expected to be transacted, in the London interbank market.

      The  calculation  agent  appointed by us,  initially The Bank of New York,
will  calculate the interest rate on the Notes.  The interest rate will be equal
to LIBOR plus 0.625%.  The interest  rate in effect for the period from November
21, 2000 to, but excluding,  February 21, 2001, the initial interest reset date,
will be LIBOR, as determined on November 17, 2000, plus 0.625%.  The calculation
agent will reset the interest rate on each interest  payment date, each of which
we will refer to as an  "interest  reset date." The second  London  business day
preceding an interest reset date will be the "interest  determination  date" for
that interest reset date. The interest rate in effect on each day that is not an
interest  reset date will be the  interest  rate  determined  as of the interest
determination date pertaining to the immediately  preceding interest reset date.
The  interest  rate in effect on any day that is an interest  reset date will be
the interest rate determined as of the interest determination date pertaining to
that interest reset date, except that the interest rate in effect for the period
from and including  November 21, 2000 to the first  interest  reset date will be
the initial interest rate.

      The  calculation  agent  will  determine  "LIBOR" in  accordance  with the
following provisions:

      (i) With respect to any  interest  determination  date,  LIBOR will be the
offered rate for deposits in United States  dollars  having an index maturity of
three months  commencing on the first day of the applicable  interest  period in
amounts of not less than $1,000,000,  as that rate appears on Telerate Page 3750
as of 11:00 A.M., London time, on that interest  determination  date. If no rate
appears,  LIBOR,  in  respect  to  that  interest  determination  date,  will be
determined in accordance with the provisions described in (ii) below.

      (ii)  With  respect  to an  interest  determination  date on which no rate
appears on Telerate Page 3750, as specified in (i) above, the calculation  agent
will request the principal  London offices of each of four major reference banks
in the London interbank market, as selected by the calculation agent, to provide
the calculation  agent with its offered  quotation for deposits in United States
dollars of not less than  $1,000,000 for the period of three months,  commencing
on the first day of the applicable interest period, to prime banks in the London
interbank  market at  approximately  11:00 A.M.,  London time,  on that interest
determination date and in a principal amount that is representative for a single
transaction  in United  States  dollars in that market at that time. If at least
two quotations are provided, then LIBOR on that interest determination date will
be the  arithmetic  mean of those  quotations.  If fewer than two quotations are
provided,  then LIBOR on the interest  determination date will be the arithmetic
mean of the rates quoted at  approximately  11:00 A.M., in The City of New York,
on the interest  determination date by three major banks in The City of New York
selected by the calculation  agent for loans in United States dollars to leading
European banks, having a three-month  maturity and in a principal amount that is
representative  for a single transaction in United States dollars in that market
at that  time;  provided,  however,  that if all of the  banks  selected  by the
calculation  agent are not providing  quotations in the manner described by this
sentence,  LIBOR determined as of that interest determination date will be LIBOR
in effect on that interest determination date.

      "Telerate  Page 3750"  means the  display  designated  on page 3750 on Dow
Jones  Markets  Limited (or such other page as may replace the 3750 page on that
service  or such other  service  as may be  nominated  by the  British  Bankers'
Association for the purpose of displaying  London interbank offered rates for U.
S. dollar deposits).

    The  accrued  interest  for any  period is  calculated  by  multiplying  the
principal amount of a Note by an accrued  interest factor.  The accrued interest
factor is computed by adding the interest factor  calculated for each day in the
period to the date for which accrued interest is being calculated.  The interest
factor  (expressed  as a decimal  rounded  upwards if  necessary) is computed by
dividing the interest rate (expressed as a decimal rounded upwards if necessary)
applicable to such date by 360.

      All  percentages  resulting  from any  calculation of the interest rate on
Notes will be rounded, if necessary,  to the nearest one-hundred thousandth of a
percentage point, with five one-millionths of a percentage point rounded upwards
(e.g.,  9.876545%  (or  .09876545)  being  rounded to 9.87655% (or .0987655) and
9.876544%  (or  .09876544)  being  rounded to 9.87654% (or  .0987654)),  and all
dollar amounts used in or resulting from such calculation will be rounded to the
nearest cent (with one-half cent being rounded upwards).

Optional Redemption

      We may redeem  all or part of the Notes from time to time on any  interest
payment date on or after November 21, 2001 at our option,  upon not less than 30
nor more than 60 days'  notice,  at a  redemption  price equal to the  principal
amount of the Notes to be redeemed plus interest accrued to the redemption date.

Global Securities

      When the Notes are initially  issued,  one or more global  securities (the
"Global Securities") will represent the Notes. These Global Securities will have
an aggregate  principal  amount equal to that of the Notes they represent.  Each
Global Security will be deposited with, or on behalf of, DTC, as depository (the
"Depositary"),  and  registered  in the  name of Cede & Co.,  a  nominee  of the
Depositary.  The Global Securities will bear legends stating the restrictions on
exchanges and  registration of transfer  referred to below and any other matters
provided for by the Indenture.

      The  Depositary  has advised the Company as follows:  The  Depositary is a
limited-purpose  trust company  organized  under the Banking Law of the State of
New York,  a member of the Federal  Reserve  System,  a  "clearing  corporation"
within the  meaning of the New York  Uniform  Commercial  Code,  and a "clearing
agency"  registered  pursuant to the provisions of section 17A of the Securities
Exchange  Act of 1934.  The  Depositary  was created to hold  securities  of its
participants  and to  facilitate  the  clearance  and  settlement  of securities
transactions  among its participants  through  electronic  book-entry changes in
accounts of the participants, thereby eliminating the need for physical movement
of securities  certificates.  The Depositary's  participants  include securities
brokers and dealers (including each of the underwriters set forth below), banks,
trust companies, clearing corporations and certain other organizations,  some of
whom  (and/or  their   representatives)  own  the  Depositary.   Access  to  the
Depositary's  book-entry  system is also  available  to  others,  such as banks,
brokers,  dealers and trust companies that clear through or maintain a custodian
relationship with a participant, either directly or indirectly.

      As long as the Depositary,  or its nominee,  is the registered holder of a
Global  Security,  the  Depositary  or its nominee,  as the case may be, will be
considered  the sole  owner and  holder of such  Global  Security  and the Notes
represented  thereby for all purposes under the Notes and the Indenture.  Except
in limited  circumstances,  owners of beneficial  interests in a Global Security
(1) will not be entitled to have such Global  Security or any Notes  represented
by the Global  Security  registered  in their names,  (2) will not receive or be
entitled to receive physical delivery of certificated  Notes in exchange for the
Global  Security and (3) will not be  considered  to be the owners or holders of
such Global  Security or any Notes  represented  by the Global  Security for any
purpose under the Notes or the Indenture.  Payments of principal of and interest
on a Global Security will be made to the Depositary or its nominee,  as the case
may be, as the  holder  thereof.  The laws of some  jurisdictions  require  that
certain  purchasers of securities  take physical  delivery of such securities in
definitive  form.  These  laws may impair  the  ability  of holders to  transfer
beneficial interests in a Global Security.

      Institutions  that  have  accounts  with  the  Depositary  or its  nominee
("participants")   and  persons  that  may  hold  beneficial  interests  through
participants  are the only holders who may own beneficial  interests in a Global
Security. In connection with the issuance of any Global Security, the Depositary
will credit, on its book-entry  registration and transfer system, the respective
principal amounts of Notes represented by the Global Security to the accounts of
its participants. Ownership of beneficial interests in a Global Security will be
shown only on, and the  transfer of those  ownership  interests  will occur only
through,  records  maintained by the Depositary  (with respect to  participants'
interests) or any such participant (with respect to interests of persons held by
such participants on their behalf). Payments, transfers,  exchanges, notices and
other  matters  relating to  beneficial  interests  in a Global  Security may be
subject to various policies and procedures adopted by the Depositary. Neither we
nor the  trustee,  the  calculation  agent,  any paying  agent,  or the security
registrar  or any of their  respective  agents will have any  responsibility  or
liability (1) for any aspect of the  Depositary's or any  participant's  records
relating to, or for payments or notices on account of, beneficial interests in a
Global  Security or (2) for  maintaining,  supervising  or reviewing any records
relating to such beneficial interests.

Events of Default

      An Event of Default  with respect to any series of Senior Notes is defined
in the Senior Note Indenture as being any one of the following:

      (1) failure to pay interest on the Senior Notes of that series for 30
days after payment is due;

      (2) failure to pay principal or any premium on the Senior Notes of that
series for 3 days after payment is due;

      (3) failure to perform other  covenants in the Senior Note Indenture after
90 days after we are given written notice;

      (4) failure to pay any sinking fund installment for 3 days after payment
is due;

      (5) certain events of bankruptcy, insolvency, reorganization,
receivership or liquidation relating to us.

Certain Notices

      With respect to any Notes represented by a Global Security,  notices to be
given to the  holders of the Notes will be deemed to have been duly given to the
holders when given to DTC, or its nominee, in accordance with DTC's policies and
procedures.  We believe that DTC's practice is to inform its participants of any
such notice it receives in accordance with its policies and procedures.  Persons
who hold beneficial interests in the Notes through DTC or its direct or indirect
participants  may  wish to  consult  with  them  about  how  notices  and  other
communications  relating  to the  Notes may be given and  received  through  the
facilities of DTC. Neither we nor the calculation agent or the trustee will have
any  responsibility  with respect to those  policies and  procedures  or for any
notices or other communications among DTC, its direct and indirect  participants
and the beneficial owners of the Notes in global form.

      With respect to Notes not represented by a Global Security,  other notices
to be given to the  holders  of the Notes will be deemed to have been duly given
to the  holders  upon  the  mailing  of such  notices  to the  holders  at their
respective addresses as they appear on the security register maintained by us or
our agent as of the close of business before the day notice is given.

      Neither the failure to give any notice nor any defect in any notice  given
to a  particular  holder  will  affect the  sufficiency  of any notice  given to
another holder.

                                  UNDERWRITING

      We and the  underwriters  named below have  entered  into an  underwriting
agreement  with  respect to the  Notes.  Subject  to  certain  conditions,  each
underwriter  has agreed  severally to purchase from us the  principal  amount of
Notes indicated in the following table:

                                                 Principal
                                                  Amount
      Underwriters                               of Notes

      UBS Warburg LLC...................      $56,000,000
      ABN AMRO Incorporated.............       30,000,000
      TD Securities (USA) Inc...........       20,000,000
      Total ............................     $106,000,000

      Notes sold by the  underwriters to the public will initially be offered at
the initial public offering price set forth on the cover of this prospectus. Any
Notes sold by the  underwriters to securities  dealers may be sold at a discount
from the initial public offering price of up to 0.15% of the principal amount of
Notes.  Any such  securities  dealers  may resell any Notes  purchased  from the
underwriters  to certain other brokers or dealers at a discount from the initial
public  offering price of up to 0.10% of the principal  amount of Notes.  If all
the Notes are not sold at the  initial  offering  price,  the  underwriters  may
change the offering price and the other selling terms.

      The  Notes  are a new  issue of  securities  with no  established  trading
market.  The  underwriters  have advised us that they intend to make a market in
the Notes but are not  obligated to do so and may  discontinue  market making at
any time without  notice.  No assurance  can be given as to the liquidity of the
trading market for the Notes.

      In connection with this offering,  the  underwriters may purchase and sell
Notes  in  the  open  market.   These  transactions  may  include  short  sales,
stabilizing  transactions  and  purchases  to cover  positions  created by short
sales.  Short sales involve the sale by the underwriters of a greater  principal
amount of Notes than they are required to purchase in the offering.  Stabilizing
transactions  consist  of  certain  bids or  purchases  made for the  purpose of
preventing  or  retarding  a decline in the market  price of the Notes while the
offering is in progress.

      The  underwriters  also may  impose a  penalty  bid.  This  occurs  when a
particular  underwriter repays to the underwriters a portion of the underwriting
discount  received  by it  because  UBS  Warburg  LLC,  acting  on behalf of the
underwriters,  has  repurchased  Notes  sold  by or  for  the  account  of  such
underwriter in a stabilizing or short covering transaction.

      These activities by the underwriters may stabilize,  maintain or otherwise
affect the market price of the Notes. As a result, the price of the Notes may be
higher than the price that  otherwise  might exist in the open market.  If these
activities are commenced,  they may be discontinued  by the  underwriters at any
time.  These  transactions  may be  effected in the  over-the-counter  market or
otherwise.

      We  estimate  that  our  total   expenses  of  the   offering,   excluding
underwriting discounts and commissions, will be approximately $124,000.

      We have agreed to indemnify the underwriters  against certain liabilities,
including liabilities under the Securities Act of 1933.

      Certain  of  the   underwriters   and  their   affiliates  may  engage  in
transactions  with,  or  perform  services  for,  us and our  affiliates  in the
ordinary course of business.

                                 LEGAL OPINIONS

      Our  counsel,  Simpson  Thacher & Bartlett,  New York,  NY, and one of our
lawyers will each issue an opinion about the legality of the notes for us. Dewey
Ballantine  LLP,  New  York,  NY  will  issue  an  opinion  for  the  agents  or
underwriters.  From time to time,  Dewey  Ballantine  LLP acts as counsel to our
affiliates for some matters.


PROSPECTUS


                       PUBLIC SERVICE COMPANY OF OKLAHOMA

                                  $200,000,000

                                  SENIOR NOTES


     Public  Service  Company  of  Oklahoma  produces,   purchases,   transmits,
distributes and sells  electricity to approximately  491,000 retail customers in
eastern and southwestern  Oklahoma. We are a wholly-owned  subsidiary of Central
and South West Corporation, a Dallas-based diversified utility holding company.

      We  intend  to  offer  from  time  to time  in one or  more  series  up to
$200,000,000  of  debentures,  notes or other  types of  senior  unsecured  debt
securities known as Senior Notes.

     When we offer a  particular  series of Senior  Notes,  we will  prepare and
issue a supplement to this prospectus  setting forth the particular terms of the
offered  Senior  Notes,  including  the  amounts,  prices and other terms of the
series. Each supplement is called a prospectus supplement.  You should read this
prospectus and any prospectus  supplement carefully before you make any decision
to invest in the Senior Notes.

      These  securities  have not been approved or disapproved by the Securities
and Exchange Commission or any state securities commission nor have any of these
organizations  determined  that this  prospectus  is accurate or  complete.  Any
representation to the contrary is a criminal offense.

     We may offer the Senior Notes directly or through  underwriters,  agents or
dealers.  Each  prospectus  supplement  will  provide  the  terms of the plan of
distribution  relating  to the  respective  series  of  Senior  Notes.  "Plan of
Distribution" below also provides more information on this topic.

                   The date of this prospectus is March 31, 2000.



                         WHERE YOU CAN FIND MORE INFORMATION

                                ABOUT THIS PROSPECTUS


     This prospectus is part of a registration  statement that we filed with the
Securities and Exchange  Commission,  or SEC,  utilizing a "shelf"  registration
process.  Under this shelf  process,  we may sell the Senior Notes  described in
this  prospectus  in one or  more  offerings  up to a  total  dollar  amount  of
$200,000,000. This prospectus provides a general description of the Senior Notes
being  offered.  Each time we sell a series of  Senior  Notes we will  provide a
prospectus  supplement  containing specific  information about the terms of that
series of Senior  Notes and the related  offering.  It is  important  for you to
consider the information contained in this prospectus and the related prospectus
supplement  together with  additional  information  described  under the heading
"Documents Incorporated by Reference" in making your investment decision.

      We are subject to the informational  requirements of the Securities Act of
l934,  and  therefore  we file  annual,  quarterly  and current  reports,  proxy
statements  and  other  information  with  the  SEC.  You may  read and copy the
registration  statement,  with  exhibits,  as  well  as the  reports  and  other
information  we file with the SEC, at the SEC's public  reference  facilities at
its principal  offices at Judiciary  Plaza,  450 Fifth Street,  N.W., Room 1024,
Washington,  D.C. 20549 and its regional offices at Northwest Atrium Center, 500
West Madison Street, Suite 1400, Chicago,  Illinois 60661-2511 and 7 World Trade
Center,  Suite 1300, New York, New York 10048. You may obtain information on the
operation of the SEC's public reference  facilities and how to request documents
by calling  1-800-SEC-0330.  Information  we file is also available at the SEC's
Internet site at http://www.sec.gov.  You can also obtain these materials at set
rates from the Public  Reference  Section of the SEC at its principal  office at
Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549.

     You  should  rely only on the  information  incorporated  by  reference  or
provided in this prospectus or any supplement.  We have not authorized anyone to
provide  you  with  different  information.  You  should  not  assume  that  the
information in this  prospectus or any  prospectus  supplement is accurate as of
any date other than the date on the front of those  documents.  This  prospectus
does not  constitute an offer to sell or a  solicitation  of an offer to buy the
Senior  Notes in any  jurisdiction  to any person to whom it is unlawful to make
such offer or solicitation in such jurisdiction.


                         DOCUMENTS INCORPORATED BY REFERENCE

      The SEC allows us to  "incorporate  by reference" the  information we file
with them,  which means that we can  disclose  important  information  to you by
referring  you to those  documents.  Information  incorporated  by  reference is
considered to be part of this  prospectus.  Later  information that we file with
the SEC will automatically update and supersede this information. We incorporate
by reference the documents listed below and any future filings made with the SEC
under Sections 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934
until we sell all the Senior Notes.

o     Annual Report on Form 10-K for the year ended December 31, 1999; and

o     Current Report on Form 8-K dated February 14, 2000.

      We will provide to each person,  including any beneficial  owner of Senior
Notes, to whom a copy of this  prospectus is delivered,  a copy of any or all of
the information  that has been  incorporated by reference in this prospectus but
not  delivered  with this  prospectus.  We will  deliver this  information  upon
written  or  oral  request  and  provide  this  information  at no  cost  to the
requester. You should direct your requests to:

Ms. Ellen Whalen
Manager of Investment Services
Central and South West Corporation
1616 Woodall Rodgers Freeway
Dallas, Texas 75202
(214) 777-1000

                         REPORTS TO HOLDERS OF SENIOR NOTES

      We are not required to furnish annual and quarterly  reports to holders of
Senior  Notes.  Our  annual  report  on Form  10-K  contains  audited  financial
statements which we will provide to holders of Senior Notes upon request.


                           FORWARD-LOOKING STATEMENTS

      We make statements in this prospectus,  any prospectus  supplement and the
documents  we  incorporate  by  reference  that are  considered  forward-looking
statements  within the meaning of the  Securities Act of 1933 and the Securities
Exchange Act of 1934.  Sometimes  these  statements  will contain  words such as
"believes,"  "expects,"  "intends,"  "plans"  and  other  similar  words.  These
statements  are not  guarantees  of our future  performance  and are  subject to
risks,  uncertainties  and other  important  factors that could cause our actual
performance or  achievements  to be materially  different from those we project.
These risks, uncertainties and factors include:

o     general economic, business and regulatory conditions;

o     the impact of Central and South West  Corporation's  proposed  merger with
      American Electric Power,  including any regulatory  conditions  imposed on
      the merger;

o     energy cost, supply and demand;

o     federal and state regulatory initiatives that increase competition;

o     federal and state regulatory developments and changes in law;

o     availability, terms and use of capital;

o     environmental issues;

o     weather; and

o     industry restructuring and cost recovery.

Given  these  uncertainties,  you  should  not  place  undue  reliance  on these
forward-looking statements. Please see the documents we incorporate by reference
for  more  information  on  these  factors.  These  forward-looking   statements
represent our estimates and assumptions  only as of the date of this prospectus.
We  undertake no  obligation  to publicly  update or revise any  forward-looking
statements, whether as a result of new information, future events or otherwise.


                               PROSPECTUS SUMMARY

      This summary does not contain all the information that may be important to
you. You should read the entire prospectus,  the prospectus supplement,  and the
documents,  financial statements and other information incorporated by reference
in the prospectus carefully before making an investment decision.


                                  The Offering

Issuer....................Public Service Company of Oklahoma

Securities Offered........Senior Notes

Aggregate Principal Amount     Up to $200,000,000

Interest Payment Dates....On dates to be determined

Maturity Date.............To be determined

Redemption................To be determined

Ranking...................The Senior Notes are our senior unsecured notes
                          ranking equally with any of our other unsecured
                          indebtedness that is not specifically subordinated
                          to the Senior Notes.  The Senior Notes are
                          subordinate to $300 million of our outstanding first
                          mortgage bonds which are secured by a mortgage on
                          substantially all of our properties.  The Senior
                          Notes are also subordinate to $30 million of our
                          outstanding medium-term notes, Series A, which are
                          secured by first mortgage bonds so long as other
                          series of first mortgage bonds remain outstanding.
                          The Senior Notes rank junior to the first mortgage
                          bonds and our medium-term notes with respect to
                          rights in and to such mortgaged property.  We may in
                          the future issue additional series of first mortgage
                          bonds and medium-term notes.

Use of Proceeds.......... We will use the net proceeds from the sale
                          of  the  Senior  Notes  to  repay  a  portion  of  our
                          long-term  debt,  all or a portion  of our  short-term
                          borrowings, and for other general corporate purposes.

                                   The Company

Business..................We are a public utility engaged in the production,
                          purchase, transmission, distribution and sale of
                          electricity.

Service Area ............ Our service area  includes  approximately  30,000
                          square  miles in portions of eastern and  southwestern
                          Oklahoma.

Population of Service Area     Approximately 1,113,000

Customers                 Approximately 491,000


                         SELECTED FINANCIAL INFORMATION

      We have derived the summary  selected  financial  data set forth below for
the years ended December 31, 1997, 1998 and 1999 from our financial  statements.
Arthur Andersen LLP, independent public accountants,  have audited the financial
statements for the three-year  period ended December 31, 1999 and the reports of
Arthur Andersen LLP thereon are incorporated by reference in this prospectus.

      You should read the information  presented below in  conjunction with  the
historical  financial  statements and notes thereto contained in our 1999 Annual
Report on Form 10-K which is incorporated by reference in this prospectus.


                          (Dollar amounts in thousands)

                             Year Ended December 31,

                            1999            1998           1997
                            ----            ----           ----

Operating Revenues...     $ 749,390      $ 780,159       $ 712,690
Operating Income.....     $  99,810      $ 115,008       $  81,776
Net Income for Common     $  62,392      $  76,630       $  50,053
Stock................
Net Utility Plant....    $1,345,450      $1,309,641     $1,308,586


                                Capitalization at
                                December 31, 1999

                                                     Actual     %

Long-Term Debt........................              $364,516    40
Company Obligated Mandatorily Redeemable
  Preferred Securities of Subsidiary Trust
   Holding Solely Junior Subordinated Debentures      75,000     8
Preferred Stock ......................                 5,286     0
Common Equity ........................               479,248    52
    Total ............................              $924,050   100

Short-Term Debt ......................              $ 79,169    +
Long-Term Debt and Preferred Stock
Currently Maturing                                  $ 20,000    +



                       PUBLIC SERVICE COMPANY OF OKLAHOMA

      We are a public  utility  company  engaged  in the  production,  purchase,
transmission,  distribution  and sale of electricity in eastern and southwestern
Oklahoma.  We  serve  approximately  491,000  retail  customers  in our  service
territory.  Central and South West  Corporation,  a  registered  public  utility
holding  company  under the  Public  Utility  Holding  Company  Act of 1935,  as
amended,  owns all of our issued and  outstanding  common stock . Our  executive
offices  are  located  at 212 East Sixth  Street,  Tulsa,  Oklahoma  74119-1212,
telephone number (918) 599-2000.

                       RATIOS OF EARNINGS TO FIXED CHARGES

      Our  ratios of  earnings  to fixed  charges  for each of the  years  ended
December 31, 1995 through 1999 are as follows:


                                    Year Ended December 31,
                                    -----------------------

                                            1999   1998   1997   1996   1995
                                            ----   ----   ----   ----   ----

Ratio of Earnings to Fixed Charges(1)       3.39   4.21   2.68   2.45   4.32

----------------------
(1) For purposes of  computing  the ratios:  (i)  earnings  consist of operating
income plus federal  income  taxes,  deferred  income taxes and  investment  tax
credits,  other income and  deductions,  allowance for funds (both  borrowed and
equity) used during  construction and interest portion of financing leases,  and
(ii) fixed charges  consist of interest on long-term debt and  short-term  debt,
and other interest charges and interest portion of financing leases.

                                 USE OF PROCEEDS

      We plan to use the net proceeds from the sale of the Senior Notes to repay
a portion of our long-term  debt, all or a portion of our short-term  borrowings
and for other  general  corporate  purposes,  subject to  applicable  regulatory
requirements.  If we do not use the net proceeds immediately, we may temporarily
invest them in short-term, interest-bearing obligations.

                         DESCRIPTION OF THE SENIOR NOTES

      General.  We will issue Senior Notes under a Senior Note Indenture between
us and the  Senior  Note  Trustee,  The Bank of New  York,  a New  York  banking
corporation. We have summarized selected provisions of the Senior Note Indenture
below.  This  is a  summary  and is not  complete.  It  does  not  describe  all
exceptions and qualifications contained in the Senior Note Indenture. You should
read the  Senior  Note  Indenture  we filed as an  exhibit  to the  registration
statement.  In the summary below, we have included references to section numbers
of the Senior Note Indenture so that you can locate the  summarized  provisions.
Capitalized terms not defined in this prospectus have the meanings given to them
in the Senior Note Indenture.

      There is no requirement under the Senior Note Indenture that future issues
of our debt  securities  be issued under the Senior Note  Indenture.  We will be
free to use other indentures or documentation,  containing  provisions different
from those  included in the Senior Note  Indenture or  applicable to one or more
issues  of  Senior  Notes,  in  connection  with  future  issues  of other  debt
securities.

      The Senior Note Indenture does not limit the aggregate principal amount of
the Senior Notes that we may issue under the Senior Note  Indenture.  The Senior
Note  Indenture  provides  that the  Senior  Notes will be issued in one or more
series.  The Senior Notes may be issued at various times and may have  differing
maturity  dates  and may  bear  interest  at  differing  rates.  The  prospectus
supplement applicable to each issue of Senior Notes will specify:

       (1) the title of the Senior Notes;

       (2) any limit on the aggregate principal amount of the Senior Notes;

       (3) the person to whom any interest on the Senior Notes shall be payable,
if other than the person in whose name the Senior  Notes are  registered  at the
close of business on the regular Record Date;

       (4) the dates or dates on which the principal of the Senior Notes will
be payable or how the date or dates will be determined;

       (5) the rate or rates at which the Senior  Notes will bear  interest,  or
how the rate or rates  will be  determined  and the  date or  dates  from  which
interest will accrue;

       (6) the dates on which interest will be payable;

       (7) the record dates for payments of interest;

       (8) the  place or  places,  if any,  in  addition  to the  office  of the
Trustee,  where the principal of, and premium, if any, and interest,  if any, on
the Senior Notes will be payable;

       (9) the period or periods  within  which the price or prices at which and
the terms and conditions upon which the Senior Notes may be repaid,  in whole or
in part, at the option of the Holder thereof;

      (10) any sinking  fund or other  provisions  or options held by Holders of
the Senior  Notes  that would  obligate  us to  repurchase  or redeem the Senior
Notes;

      (11) the  percentage,  if less  than 100% of the  principal  amount of the
Senior  Notes  that will be  payable  if the  maturity  of the  Senior  Notes is
accelerated;

      (12) any changes or  additions  to the events of default  under the Senior
Note  Indenture or changes or additions to our  covenants  under the Senior Note
Indenture;

      (13) any collateral, security, assurance or guarantee for the Senior
Notes; and

      (14) any other specific terms applicable to the Senior Notes.

      Unless we otherwise indicate in the applicable prospectus supplement,  the
Senior  Notes  will  be  denominated  in  United  States   currency  in  minimum
denominations of $1,000 and multiples of $1,000.

      Unless we  otherwise  indicate in the  applicable  prospectus  supplement,
there are no  provisions  in the Senior Note  Indenture or the Senior Notes that
require us to redeem, or permit the Holders to cause a redemption of, the Senior
Notes  or that  otherwise  protect  the  Holders  in the  event  that  we  incur
substantial additional indebtedness,  whether or not in connection with a change
in control of our  company.  However,  any  change in control  transaction  that
involves  the  incurrence  of  additional  long-term  indebtedness,  as notes or
otherwise,  by us in such a  transaction  may require  approval of state utility
regulatory authorities and, possibly, of federal utility regulatory authorities.
Our  management   believes  that  such  approvals  would  be  uncertain  in  any
transaction that would result in us, or our successor, having a highly leveraged
capital structure.

      Registration, Transfer, Exchange and Form. Senior Notes of any series will
be  exchangeable  for other  Senior  Notes of the same series of any  authorized
denominations and of a like aggregate principal amount and tenor.
(Section 305)

      Unless we  otherwise  indicate in the  applicable  prospectus  supplement,
Senior Notes may be presented  for  registration  of transfer,  duly endorsed or
accompanied by a duly executed written instrument of transfer,  at the office or
agency   maintained  for  such  purpose,   without  service  charge  except  for
reimbursement of taxes and other governmental charges as described in the Senior
Note Indenture. (Section 305)

      In the event of any  redemption of Senior Notes of any series,  the Senior
Note  Trustee  will not be  required  to  exchange or register a transfer of any
Senior  Notes of the series  selected,  called or being  called  for  redemption
except the unredeemed portion of any Senior Note being redeemed in part.
(Section 305)

      Book-Entry Only System. The following discussion pertains to Senior
Notes that are issued in book-entry only form.

      One or more global  notes  would be issued to DTC,  The  Depository  Trust
Company,  or  its  nominee.   DTC  would  keep  a  computerized  record  of  its
participants (for example,  your broker) whose clients have purchased the Senior
Notes. The participant would then keep a record of its clients who purchased the
Senior  Notes.  A global  note may not be  transferred,  except  that  DTC,  its
nominees and their successors may transfer an entire global note to one another.

      Under  book-entry  only,  we will not  issue  certificates  to  individual
holders of the Senior Notes.  Beneficial interests in global notes will be shown
on, and transfers of global notes will be made only through,  records maintained
by DTC and its participants.

      DTC has advised us that it is:

      (1) a limited-purpose trust company organized under the New York Banking
Law;

      (2) a "banking organization" within the meaning of the New York Banking
Law;

      (3) a member of the Federal Reserve System;

      (4) a "clearing corporation" within the meaning of the New York Uniform
Commercial Code; and

      (5) a "clearing agency"  registered  pursuant to the provisions of Section
17A of the Securities Exchange Act of 1934.

      DTC holds  securities  that its  participants  deposit  with DTC. DTC also
facilitates the settlement among direct participants of securities transactions,
such as transfers  and pledges,  in deposited  securities  through  computerized
records for direct participants'  accounts. This eliminates the need to exchange
certificates. Direct participants include securities brokers and dealers, banks,
trust companies, clearing corporations and certain other organizations.

      DTC's  book-entry  system  is also  used by  other  organizations  such as
securities  brokers and dealers,  banks and trust  companies that work through a
direct participant. The rules that apply to DTC and its participants are on file
with the SEC.

      DTC is owned by a number of its direct participants and by the New York
Stock Exchange, Inc., The American Stock Exchange, Inc. and the National
Association of Securities Dealers, Inc.

      We will wire principal and interest payments to DTC's nominee.  We and the
Senior Note  Trustee  will treat DTC's  nominee as the owner of the global notes
for all  purposes.  Accordingly,  we and the Senior  Note  Trustee  will have no
direct  responsibility  or  liability  to pay amounts due on the Senior Notes to
owners of beneficial interests in the global notes.

      It is DTC's current practice,  upon receipt of any payment of principal or
interest, to credit direct participants'  accounts on the payment date according
to their  respective  holdings of  beneficial  interests  in the global notes as
shown on DTC's records as of the record date for such payment.  In addition,  it
is DTC's  current  practice to assign any  consenting or voting rights to direct
participants  whose  accounts are credited with  securities on a record date, by
using an  omnibus  proxy.  Payments  by  participants  to owners  of  beneficial
interests in the global notes, and voting by  participants,  will be governed by
the  customary  practices  between  the  participants  and owners of  beneficial
interests,  as is the case with  securities  held for the  account of  customers
registered in "street name." However,  these payments will be the responsibility
of the participants and not of DTC, the Senior Note Trustee, or us.

      Senior Notes represented by a global note would be exchangeable for Senior
Note certificates with the same terms in authorized denominations only if:

      (1)  DTC  notifies  us that it is  unwilling  or  unable  to  continue  as
depository or if DTC ceases to be a clearing agency  registered under applicable
law; or

      (2) we instruct the Senior Note Trustee that the global note is now
exchangeable; or

      (3) an event of default has occurred and is continuing.

      According to the DTC, the  foregoing  information  with respect to DTC has
been provided to the financial community for informational  purposes only and is
not intended to serve as a representation, warranty, or contract modification of
any kind.

      Paying Agents. We will maintain an office or agency where Senior Notes may
be presented or surrendered  for payment.  We will give prompt written notice to
the Senior Note Trustee of the  location,  and any change in the location of the
office or agency.  If at any time we fail to  maintain  any  required  office or
agency  or fail to  furnish  the  Senior  Note  Trustee  with the  address,  any
presentations and surrenders may be made or served at the corporate trust office
of the Senior Note  Trustee,  and the Senior Note Trustee shall act as our agent
to receive all presentations and surrenders.
(Section 1002)

      All  monies we pay to a paying  agent for the  payment  of  principal  of,
interest or premium,  if any, on any Senior Note which  remain  unclaimed at the
end of two years after the principal,  interest or premium shall have become due
and payable will be repaid to us. The Holder of the Senior Note will  thereafter
look only to us for payment. (Section 1003)

      Consolidation,  Merger,  Conveyance,  Sale or Transfer.  Unless  otherwise
provided in a supplemental  indenture and described in a prospectus  supplement,
we may  consolidate  or merge with any Person or  transfer  our  properties  and
assets substantially as an entirety to any Person provided that:

      (1) the successor is a Person organized and existing under the laws of
the United States or any State or the District of Columbia; and

      (2) the successor  expressly  assumes by a supplemental  indenture the due
and punctual payment of the principal of, and premium, if any, and interest,  if
any, on all the Senior Notes and the performance of every covenant of the Senior
Note Indenture that we would otherwise have to perform. (Section 801)

      Limitation  on Liens.  If this  covenant is made  applicable to the Senior
Notes of any  particular  series,  we have agreed that we will not,  nor will we
permit any of our subsidiaries to, issue,  assume or guarantee any notes, bonds,
debentures  or other  similar  evidences  of  indebtedness  for  borrowed  money
(collectively  referred  to as "debt")  secured  by a  mortgage,  lien,  pledge,
security  interest or other  encumbrance (a "lien") on or with respect to any of
our properties or assets or assets or properties of our  subsidiaries  unless we
make  effective  a  provision  under  which the Senior  Notes of that series are
secured equally and ratably with any and all borrowed money that we secure. This
restriction will not, however, apply to the following:

      (1) liens in existence on the date of the original issue of the Senior
Notes to which this restriction is made applicable;

      (2) liens  created  solely for the  purpose of securing  debt  incurred to
finance,  refinance or refund the purchase price or cost,  including the cost of
construction,   of  property  acquired  after  the  date  hereof,  by  purchase,
construction  or otherwise,  or liens in favor of guarantors of  obligations  or
debt representing,  or incurred to finance,  refinance or refund,  such purchase
price or cost,  provided that no such lien shall extend to or cover any property
other than the property so acquired and improvements thereon;

      (3) liens which secure only indebtedness owing by any of our
subsidiaries, to one or more of our subsidiaries, or to us and one or more of
our subsidiaries;

      (4) liens on any property or assets acquired from a Person which is merged
with or into us or any subsidiary, or any liens on the property or assets of any
corporation  or other  entity  existing  at the time such  corporation  or other
entity  becomes a subsidiary  and, in either case, is not created as a result of
or in connection with or in anticipation of any such  transaction,  unless liens
were created to secure or provide the payment of any part of the purchase  price
of such corporation;

      (5) any lien on any property or assets existing at the time of acquisition
thereof  and which is not  created  as a result of or in  connection  with or in
anticipation  of such  acquisition,  unless  the lien was  created  to secure or
provide for the payment of any part of the  purchase  price of such  property or
assets; or

      (6) any  extension,  renewal or replacement of any lien referred to in the
foregoing clauses (1) through (5), provided that the principal amount of debt so
secured thereby shall not exceed the principal  amount of debt so secured at the
time of such extension, renewal or replacement, and that such extension, renewal
or replacement  lien shall be limited to all or part of  substantially  the same
property which secured the lien extended, renewed or replaced, plus improvements
on such property.

      Notwithstanding the foregoing,  we and one or more of our subsidiaries may
issue,  assume or  guarantee  debt  secured by liens  which would  otherwise  be
subject to the foregoing  restrictions in an aggregate  principal  amount which,
together with the  aggregate  outstanding  principal  amount of all of our other
debt  which  would  otherwise  be  subject to the  foregoing  restrictions,  not
including debt permitted to be secured under clauses (1) through (6) above, does
not at the time of issuance,  assumption  or  guarantee  thereof  exceed  twenty
percent of the Net Tangible Assets.

      Net  Tangible  Assets is  defined  as the total of all  assets,  including
revaluations  thereof  as  a  result  of  commercial  appraisals,   price  level
restatement or otherwise,  appearing on our and our subsidiaries' balance sheet,
net of applicable reserves and deductions,  but excluding goodwill, trade names,
trademarks,  patents,  unamortized  debt discount and all other like  intangible
assets, which term shall not be construed to include such revaluations, less the
aggregate of our and our  subsidiaries'  current  liabilities  appearing on such
balance sheet. The following types of transactions,  among others,  shall not be
deemed to create  debt  secured by liens:  Liens  required  by any  contract  or
statute in order to permit us or our  subsidiaries  to perform  any  contract or
subcontract  made by us with or at the request of a  governmental  entity or any
department,  agency or instrumentality thereof, or to secure partial,  progress,
advance  or  any  other  payments  to us or  any of  our  subsidiaries  by  such
governmental  unit  pursuant  to the  provisions  of any  contract  or  statute.
(Section 1007)

      Modification of the Senior Note Indenture. Under the Senior Note Indenture
or any  supplemental  indenture,  our rights  and the  rights of the  Holders of
Senior  Notes may be changed  with the  consent of the  Holders of a majority in
principal amount of the outstanding  Senior Notes, of all series affected by the
change, voting as one class, provided that the following changes may not be made
without  the  consent of the Holders of each  outstanding  Senior Note  affected
thereby:

      (1) change the fixed date upon which the  principal  of or the interest on
any Senior Note is due and payable,  or reduce the principal  amount  thereof or
the rate of interest thereon or any premium payable upon the redemption thereof,
or reduce the amount of the  principal of an Original  Issue  Discount  Security
that  would be  payable  upon a  declaration  of  acceleration  of the  maturity
thereof,  or change any place of payment  where,  or the currency in which,  any
Senior Note or any  premium or the  interest  thereon is payable,  or impair the
right to institute suit for the  enforcement of any payment on or after the date
such  payment is due or, in the case of  redemption,  on or after the date fixed
for such redemption (the "Redemption Date");

      (2) reduce the  stated  percentage  of Senior  Notes,  the  consent of the
Holders of which is required for any modification of the applicable  Senior Note
Indenture or for waiver by the Holders of certain of their rights; or

      (3) modify certain provisions of the Senior Note Indenture. (Section
902)

      An Original Issue Discount  Security means any security  authenticated and
delivered under the Senior Note Indenture which provides for an amount less than
the  principal  amount  thereof to be due and payable  upon the  declaration  of
acceleration of the maturity thereof.

      The Senior Note Indenture also contains  provisions  permitting us and the
Senior Note Trustee to amend the Senior Note Indenture in certain  circumstances
without the consent of the Holders of any Senior Notes to evidence a merger, the
replacement of the Senior Note Trustee and for certain other purposes.

      Events of  Default.  An Event of  Default  with  respect  to any series of
Senior  Notes is defined in the Senior  Note  Indenture  as being any one of the
following:

      (1) failure to pay interest on the Senior Notes of that series for 30
days after payment is due;

      (2) failure to pay principal or any premium on the Senior Notes of that
series when due;

      (3) failure to perform other  covenants in the Senior Note Indenture after
90 days after we are given written notice;

      (4) failure to pay any sinking fund installment when due;

      (5) certain events of bankruptcy, insolvency, reorganization,
receivership or liquidation relating to us. (Section 501)

      An Event of Default regarding a particular series of Senior Notes does not
necessarily constitute an Event of Default for any other series of Senior Notes.

      We will be  required  to file with the Senior  Note  Trustee  annually  an
officers'  certificate  as to the absence of default in  performance  of certain
covenants in the Senior Note Indenture. (Section 1008) The Senior Note Indenture
provides that the Senior Note Trustee may withhold  notice to the Holders of the
Senior Notes of any default,  except in payment of principal of, or premium,  if
any, or  interest  on, the Senior  Notes or in the  payment of any sinking  fund
installment with respect to the Senior Notes, if the Senior Note Trustee in good
faith  determines  that it is in the interest of the Holders of the Senior Notes
to do so. (Section 602)

      The Senior  Note  Indenture  provides  that,  if an Event of Default  with
respect  to the Senior  Notes  specified  therein  shall  have  happened  and be
continuing,  either the  Senior  Note  Trustee or the  Holders of 33% or more in
aggregate  principal amount of the Senior Notes may declare the principal amount
of all the Senior Notes to be due and payable immediately.  However, if we shall
cure all defaults and certain other  conditions are met, such declaration may be
annulled  and past  defaults  may be  waived by the  Holders  of a  majority  in
aggregate principal amount of the Senior Notes. (Section 502)

      Subject to the  provisions  of the Senior Note  Indenture  relating to the
duties of the Senior  Note  Trustee,  the Senior Note  Trustee  will be under no
obligation  to  exercise  any of its  rights or powers  under  the  Senior  Note
Indenture at the request or direction of any of the Holders of the Senior Notes,
unless the  Holders  shall have  offered to the Senior Note  Trustee  reasonable
indemnity. (Section 603)

      Subject to the provision for indemnification, the Holders of a majority in
principal  amount of the  Senior  Notes  will have the right to direct the time,
method and place of conducting any  proceeding  for any remedy  available to the
Senior Note Trustee,  or exercising  any trust or power  conferred on the Senior
Note Trustee with respect to the Senior Notes.  However, the Senior Note Trustee
shall  have the right to  decline to follow  any  direction  if the Senior  Note
Trustee shall  determine  that the action so directed  conflicts with any law or
the  provisions of the Senior Note Indenture or if the Senior Note Trustee shall
determine that the action would be prejudicial to Holders not taking part in the
direction. (Section 512)

      Defeasance.  We may  elect  either  (a) to be  discharged  from all of our
obligations with respect to the Senior Notes, except for obligations to register
the  transfer or exchange of Senior  Notes,  replace  stolen,  lost or mutilated
Senior  Notes,  to maintain  paying  agencies  and to hold moneys for payment in
trust, or (b) to be discharged from our obligations under sections of the Senior
Note Indenture  described  under  "Consolidation,  Merger,  Conveyance,  Sale or
Transfer"  and  "Limitation  of  Liens"  or to  certain  covenants  relating  to
corporate  existence and maintenance of properties and insurance,  in each case,
if:

      (1) we deposit  with the  Senior  Note  Trustee,  in trust,  money,  or in
certain cases, U.S. Government  Obligations  sufficient to pay and discharge (i)
the principal of, and premium, if any, and interest,  if any, on the outstanding
Senior Notes on the dates such payments are due, in accordance with the terms of
the Senior Notes and (ii) any mandatory sinking fund payments  applicable to the
Senior Notes on the day on which payments are due and payable in accordance with
the terms of the Senior Note Indenture and of the Senior Notes;

      (2) no Event of Default or event  which with notice or lapse of time would
become an Event of Default, including by reason of such deposit, with respect to
the Senior  Notes  shall have  occurred  and be  continuing  on the date of such
deposit;

      (3) we  deliver to the  Senior  Note  Trustee an opinion of counsel to the
effect (i) that the Holders will not recognize income,  gain or loss for Federal
income  tax  purposes  as a result of such  deposit  and  defeasance  of certain
obligations;  (ii) that such provision  would not cause any  outstanding  Senior
Notes then listed on any national securities exchange to be delisted as a result
thereof;  and (iii) that the  defeasance  trust is not, or is registered  as, an
investment company under the Investment Company Act of 1940; and

      (4) we have delivered to the Senior Note Trustee an officers'  certificate
and an opinion of counsel,  each stating that all conditions  precedent provided
for in the Senior Note Indenture  relating to the  satisfaction and discharge of
the Senior Notes have been complied with.
(Sections 403, 1011)

      Discharged  means,  with  respect to the Senior  Notes of any series,  the
discharge of the entire indebtedness  represented by, and our obligations under,
the  Senior  Notes  of  such  series  and  in  the  satisfaction  of  all of our
obligations  under,  the Senior Note  Indenture  relating to the Senior Notes of
such series, except (a) the rights of Holders of the Senior Notes of such series
to  receive,  from the  trust  fund  established  pursuant  to the  Senior  Note
Indenture,  payment of the principal of and interest and premium, if any, on the
Senior Notes of such series when such payments are due, (b) our obligations with
respect  to the  Senior  Notes of such  series  with  respect  to  registration,
transfer,  exchange  and  maintenance  of a place of payment and (c) the rights,
powers,  trusts,  duties,  protections and immunities of the Senior Note Trustee
under the Senior Note Indenture. (Section 101)

      If we have  deposited or caused to be deposited  money or U.S.  Government
Obligations  to pay or discharge  the  principal  of, and  premium,  if any, and
interest,  if any, on the outstanding Senior Notes to and including a Redemption
Date on which  all of the  outstanding  Senior  Notes are to be  redeemed,  such
Redemption  Date  shall  be  irrevocably  designated  by a  Board  of  Directors
resolution  delivered  to the  Senior  Note  Trustee  on or prior to the date of
deposit  of such  money  or U.S.  Government  Obligations,  and  such  Board  of
Directors resolution shall be accompanied by an irrevocable Company Request that
the Senior Note  Trustee give notice of such  redemption  in our name and at our
expense not less than 30 nor more than 60 days prior to such  Redemption Date in
accordance with the Senior Note Indenture. (Sections 403)

      U.S. Government  Obligations means direct obligations of the United States
for the payment of which its full faith and credit is pledged, or obligations of
a person controlled or supervised by and acting as an agency or  instrumentality
of the United States and the payment of which is  unconditionally  guaranteed by
the United States. U.S.  Government  Obligations shall also include a depositary
receipt  issued by a bank or trust company as custodian with respect to any such
U.S. Government  Obligation or a specific payment of interest on or principal of
any such U.S. Government  Obligation held by such custodian for the account of a
holder of a  depositary  receipt.  However,  except  as  required  by law,  such
custodian is not authorized to make any deduction from the amount payable to the
holder of such  depositary  receipt from any amount received by the custodian in
respect of the U.S. Government Obligation or the specific payment of interest on
or  principal of the U.S.  Government  Obligation  evidenced by such  depositary
receipt. (Section 101)

      Resignation or Removal of Senior Note Trustee. The Senior Note Trustee may
resign at any time by giving  written notice to us specifying the day upon which
the resignation is to take effect.  The resignation will take effect immediately
upon the later of the  appointment  of a successor  Senior Note Trustee and such
specified day. (Section 610)

      The Senior  Note  Trustee may be removed at any time by an  instrument  or
concurrent  instruments  in writing  delivered to the Senior Note Trustee and us
and signed by the Holders, or their attorneys-in-fact, of at least a majority in
principal  amount of the then  outstanding  Senior  Notes.  In  addition,  under
certain circumstances,  we may remove the Senior Note Trustee upon notice to the
Holder  of each  Senior  Note  outstanding  and the  Senior  Note  Trustee,  and
appointment of a successor Senior Note Trustee. (Section 610)

      No Recourse  Against  Others.  The Senior Note Indenture  provides that no
recourse will be had against any of our incorporators, stockholders, officers or
directors,  as such,  past,  present or future or any successor  Person,  either
directly  or  through  us or any  successor  Person,  whether  by  virtue of any
constitution, statute or rule of law, or by the enforcement of any assessment or
penalty or otherwise in the case of the following:

      (1) the payment of the principal of or any premium or interest on any
Senior Note, or for any claim based thereon or otherwise in respect thereof;

      (2) under or upon any obligation, covenant or agreement of ours, contained
in the Senior Note Indenture or in any supplemental  indenture, or in any Senior
Note; or

      (3) because of the creation of any indebtedness represented thereby.

      It shall be  expressly  understood  that all such  liability  is expressly
waived and released as a condition of, and in  consideration  for, the execution
of the Senior Note Indenture and the issuance of the Senior Notes. (Section 114)
Such  waiver  may not be  effective  to  waive  liabilities  under  the  Federal
securities  laws  and it is the view of the SEC that  such a waiver  is  against
public policy.

      Concerning  the Senior Note  Trustee.  The  Trustee  under the Senior Note
Indenture,  and  affiliates  of the  Trustee,  are  also  trustees  under  other
indentures and trust agreements of ours.

                                 LEGAL OPINIONS

      Legal opinions  relating to the validity of the Senior Notes will be given
by Milbank,  Tweed,  Hadley & McCloy LLP, 1 Chase Manhattan Plaza, New York, New
York 10005, our counsel, and Sidley & Austin, One First National Plaza, Chicago,
Illinois 60603, counsel for any underwriters, agents or dealers. Sidley & Austin
and Milbank,  Tweed,  Hadley & McCloy LLP have represented CSW and affiliates of
CSW,  including us, from time to time in connection  with certain legal matters.
All matters of Oklahoma law will be passed upon by Doerner,  Saunders,  Daniel &
Anderson, L.L.P., Tulsa, Oklahoma.

                                     EXPERTS

      The audited financial  statements and schedules  incorporated by reference
in this prospectus and elsewhere in the registration statement have been audited
by Arthur Andersen LLP,  independent public  accountants,  as indicated in their
report dated  February 25, 2000,  with  respect  thereto,  and are  incorporated
herein by  reference in reliance  upon the  authority of said firm as experts in
accounting and auditing in giving said reports.

                              PLAN OF DISTRIBUTION

      We may use the following methods to sell the Senior Notes:

      (1) through negotiation with one or more underwriters;

      (2) through one or more agents or dealers designated from time to time;

      (3) directly to purchasers; or

      (4) through any combination of the above.

The distribution of the Senior Notes may be effected from time to time in one or
more  transactions  at a fixed price or prices  which may be changed,  at market
prices  prevailing  at the time of sale,  at prices  related to such  prevailing
market prices or at negotiated  prices. A prospectus  supplement or a supplement
thereto  will  describe  the method of  distribution  of the Senior Notes of any
series.

      If we use any underwriters in the sale of Senior Notes, we will enter into
an underwriting agreement, distribution agreement or similar agreement with such
underwriters  prior to the time of sale, and the names of the underwriters  used
in  the  transaction  will  be  set  forth  in the  prospectus  supplement  or a
supplement  thereto  relating  to such sale.  If an  underwriting  agreement  is
executed,  the Senior Notes will be acquired by the  underwriters  for their own
account  and may be  resold  from  time  to  time  in one or more  transactions,
including  negotiated  transactions,  at a fixed  public  offering  price  or at
varying prices determined at the time of the sale. Unless we otherwise  indicate
in the  prospectus  supplement,  the  underwriting  or purchase  agreement  will
provide that the  underwriter or  underwriters  are obligated to purchase all of
the Senior Notes offered in the prospectus supplement if any are purchased.

      If any of the Senior Notes are sold through  agents  designated by us from
time to time,  the prospectus  supplement or a supplement  thereto will name any
such agent,  set forth any  commissions  payable by us to any such agent and the
obligations  of such agent with respect to the Senior  Notes.  Unless  otherwise
indicated in the prospectus  supplement or a supplement thereto,  any such agent
will be acting on a best efforts basis for the period of its appointment.

      Certain  persons  participating  in an  offering  of the Senior  Notes may
engage in transactions that stabilize, maintain or otherwise affect the price of
the Senior  Notes.  Specifically,  the  underwriters,  if any, may  overallot in
connection with the offering, and may bid for, and purchase, the Senior Notes in
the open market.

      The  Senior  Notes  of  any  series,  when  first  issued,  will  have  no
established trading market. Any underwriters or agents to or through whom Senior
Notes  are sold by us for  public  offering  and sale may make a market  in such
Senior Notes, but underwriters and agents will not be obligated to do so and may
discontinue  any market making at any time without  notice.  No assurance can be
given as to the liquidity of the trading market for any Senior Notes.

      In  connection  with  the  sale  of  the  Senior  Notes,  any  purchasers,
underwriters  or agents may receive  compensation  from us or from purchasers in
the form of concessions or commissions. The underwriters will be, and any agents
and any dealers  participating  in the  distribution of the Senior Notes may be,
deemed to be underwriters  within the meaning of the Securities Act of 1933. The
agreement  between us and any  purchasers,  underwriters  or agents will contain
reciprocal  covenants of indemnity,  and will provide for  contribution by us in
respect  of  our  indemnity   obligations,   between  us  and  the   purchasers,
underwriters, or agents against certain liabilities, including liabilities under
the Securities Act of 1933.

      Underwriters,  dealers  and  agents may engage in  transactions  with,  or
perform services for, us and our affiliates in the ordinary course of business.



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