OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
Supplement dated June 29, 2000 to the
Prospectus dated December 22, 1999
The Prospectus is changed as follows:
1. The supplement dated April 11, 2000 is replaced with this supplement.
2. Effective April 1, 2000, the Manager withdrew its voluntary undertaking to
limit its management fees to a maximum annual rate of 0.40%. Accordingly,
the last three sentences in the paragraph under the table entitled "Annual
Fund Operating Expenses" on page 6 are removed.
3. The second sentence of the first paragraph in the section entitled "Class
A Contingent Deferred Sales Charge" on page 18 is revised to read as
follows:
The Distributor pays dealers of record commissions in an amount equal to
0.50% of purchases of $1 million or more (other than by retirement plans,
which are not permitted in the Fund).
June 30, 2000 PS0725.015
