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                                                      OPPENHEIMERFUNDS
Patricia C. Foster                                    OppenheimerFunds, Inc.
Vice President                                        Rochester Division
and Assistant Counsel                                 350 Linden Oaks
                                                      Rochester, NY 14625-2807
                                                      Tel 716 383-1300


                                                      May 1, 1997



Securities and Exchange Commission
Mail Stop 0-7, Filer Support
6432 General Green Way
Alexandria, VA 22312

           RE:    Centennial California Tax Exempt Trust ("Registrant")
                  Reg No.  33-30471
                  File No.  811-5871

To the Securities and Exchange Commission:

         An  electronic  filing  is  hereby  made on  behalf  of the  Registrant
pursuant to Rule 497(e) of the Securities  Act of 1933, as amended.  Such filing
includes a supplement  dated May 1, 1997 to the  Registrant's  Prospectus  dated
November 1, 1996.

         If there are any questions, please contact the undersigned.

                                                Sincerely,


                                                /s/ Patricia C. Foster
                                                -----------------------
                                                Patricia C. Foster
                                                Vice President
                                                and Assistant  Counsel
                                                (800) 552-1149

cc:      Deloitte & Touche LLP
         Myer, Swanson, Adams & Wolf P.C.
         Gloria LaFond
         Grace Loffredo







                     CENTENNIAL CALIFORNIA TAX EXEMPT TRUST
                       Supplement dated May 1, 1997 to the
                        Prospectus dated November 1, 1996

The Prospectus is changed as follows:

1. In "Exchange  Privilege"  under  "Exchanges of Shares" on page 16, the second
sentence of the fourth paragraph is replaced by the following:

         The  redemption  proceeds of shares of a Trust  acquired by exchange of
         Class A shares of an Eligible Fund  purchased  subject to a CDSC,  that
         are redeemed  within 12 months of the end of the calendar  month of the
         initial  purchase  of  the  exchanged  shares  (18  months  for  shares
         purchased  prior  to May 1,  1997),  will  be  subject  to the  CDSC as
         described in the prospectus of that other Eligible Fund.

2. The  section  captioned  "Exchanges  of  Shares"  is  revised  by adding  the
following after the sub-section  captioned "General Information on Exchanges" on
page 17:

Shareholder  Transactions by Fax.  Beginning May 30, 1997,  requests for certain
account  transactions  may be sent to the  Transfer  Agent by fax  (telecopier).
Please  call   1-800-525-7048  for  information  about  which  transactions  are
included.  Transaction  requests  submitted by fax are subject to the same rules
and restrictions as written and telephone requests described in this Prospectus.


May 1, 1997                                                          PS0180.001