MORGAN STANLEY DEAN WITTER CALIFORNIA TAX FREE INCOME FUND
497, 2000-04-05
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<PAGE>
                                                Filed Pursuant to Rule 497(b)
                                                Registration File No.: 333-31270

          MORGAN STANLEY DEAN WITTER MULTI-STATE MUNICIPAL SERIES TRUST
                                CALIFORNIA SERIES

                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                                 (800) 869-NEWS

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                            TO BE HELD JUNE 22, 2000


TO THE SHAREHOLDERS OF THE CALIFORNIA SERIES, A SERIES OF MORGAN STANLEY DEAN
WITTER MULTI-STATE MUNICIPAL SERIES TRUST :

     Notice is hereby given of a Special Meeting of the Shareholders of the
California Series ("California Series"), a portfolio of Morgan Stanley Dean
Witter Multi-State Municipal Series Trust ("Multi-State"), to be held in
Conference Room A, Forty-Fourth Floor, Two World Trade Center, New York, New
York 10048, at 10:00 A.M., New York time, on June 22, 2000, and any adjournments
thereof (the "Meeting"), for the following purposes:

1.   To consider and vote upon an Agreement and Plan of Reorganization, dated
     January 26, 2000 (the "Reorganization Agreement"), between Multi-State, on
     behalf of California Series, and Morgan Stanley Dean Witter California
     Tax-Free Income Fund ("California Tax-Free"), pursuant to which
     substantially all of the assets of California Series would be combined with
     those of California Tax-Free and shareholders of California Series would
     become shareholders of California Tax-Free receiving Class D shares of
     California Tax-Free with a value equal to the value of their holdings in
     California Series (the "Reorganization"); and

2.   To act upon such other matters as may properly come before the Meeting.

     The Reorganization is more fully described in the accompanying Proxy
Statement and Prospectus and a copy of the Reorganization Agreement is attached
as Exhibit A thereto. Shareholders of record at the close of business on March
17, 2000 are entitled to notice of, and to vote at, the Meeting. Please read the
Proxy Statement and Prospectus carefully before telling us, through your proxy
or in person, how you wish your shares to be voted. Alternatively, if you are
eligible to vote telephonically by touchtone telephone or electronically on the
Internet (as discussed in the enclosed Proxy Statement) you may do so in lieu of
attending the Meeting in person. THE BOARD OF TRUSTEES OF MULTI-STATE RECOMMENDS
YOU VOTE IN FAVOR OF THE REORGANIZATION. WE URGE YOU TO SIGN, DATE AND MAIL THE
ENCLOSED PROXY PROMPTLY.


                                            By Order of the Board of Trustees,


                                            BARRY FINK,
                                            Secretary

March 31, 2000


  YOU CAN HELP AVOID THE NECESSITY AND EXPENSE OF SENDING FOLLOW-UP LETTERS TO
  ENSURE A QUORUM BY PROMPTLY RETURNING THE ENCLOSED PROXY. IF YOU ARE UNABLE
  TO BE PRESENT IN PERSON, PLEASE FILL IN, SIGN AND RETURN THE ENCLOSED PROXY
  IN ORDER THAT THE NECESSARY QUORUM BE REPRESENTED AT THE MEETING. THE
  ENCLOSED ENVELOPE REQUIRES NO POSTAGE IF MAILED IN THE UNITED STATES. AS
  DISCUSSED IN THE ENCLOSED PROXY STATEMENT, CERTAIN SHAREHOLDERS WILL BE ABLE
  TO VOTE TELEPHONICALLY BY TOUCHTONE TELEPHONE OR ELECTRONICALLY ON THE
  INTERNET BY FOLLOWING INSTRUCTIONS ON THEIR PROXY CARDS OR ON THE ENCLOSED
  VOTING INFORMATION CARD.

<PAGE>

                           MORGAN STANLEY DEAN WITTER
                         CALIFORNIA TAX-FREE INCOME FUND

                TWO WORLD TRADE CENTER, NEW YORK, NEW YORK 10048
                                 (800) 869-NEWS


                          ACQUISITION OF THE ASSETS OF
                       THE CALIFORNIA SERIES, A SERIES OF
          MORGAN STANLEY DEAN WITTER MULTI-STATE MUNICIPAL SERIES TRUST


                    BY AND IN EXCHANGE FOR CLASS D SHARES OF
           MORGAN STANLEY DEAN WITTER CALIFORNIA TAX-FREE INCOME FUND


     This Proxy Statement and Prospectus is being furnished to shareholders of
the California Series ("California Series"), a portfolio of Morgan Stanley Dean
Witter Multi-State Municipal Series Trust ("Multi-State"), in connection with an
Agreement and Plan of Reorganization, dated January 26, 2000 (the
"Reorganization Agreement"), pursuant to which substantially all the assets of
California Series will be combined with those of Morgan Stanley Dean Witter
California Tax-Free Income Fund ("California Tax-Free") in exchange for Class D
shares of California Tax-Free (the "Reorganization"). As a result of this
transaction, shareholders of California Series will become shareholders of
California Tax-Free and will receive Class D shares of California Tax-Free with
a value equal to the value of their holdings in California Series. The terms and
conditions of this transaction are more fully described in this Proxy Statement
and Prospectus and in the Reorganization Agreement between Multi-State, on
behalf of California Series, and California Tax-Free, attached hereto as Exhibit
A. The address of California Series is that of California Tax-Free set forth
above. This Proxy Statement also constitutes a Prospectus of California
Tax-Free, which is dated March 29, 2000, filed by California Tax-Free with the
Securities and Exchange Commission (the "Commission") as part of its
Registration Statement on Form N-14 (the "Registration Statement").

     California Tax-Free is an open-end diversified management investment
company whose investment objective is to provide a high level of current income
exempt from federal and California State income taxes, consistent with
preservation of capital. The fund seeks to achieve its objective by investing at
least 80% of its assets in securities that pay interest exempt from federal and
California State income taxes.

     This Proxy Statement and Prospectus sets forth concisely information about
California Tax-Free that shareholders of California Series should know before
voting on the Reorganization Agreement. A copy of the Prospectus for California
Tax-Free dated February 22, 2000, is attached as Exhibit B and incorporated
herein by reference. Also enclosed and incorporated herein by reference is
California Tax-Free's Annual Report for the fiscal year ended December 31, 1999.
A Statement of Additional Information relating to the Reorganization, described
in this Proxy Statement and Prospectus (the "Additional Statement"), dated March
29, 2000, has been filed with the Commission and is also incorporated herein by
reference. Also incorporated herein by reference are Multi-State's Prospectus,
dated February 25, 2000, and Annual Report for its fiscal year ended November
30, 1999. Such documents are available without charge by calling (800) 869-NEWS
(TOLL FREE).

Investors are advised to read and retain this Proxy Statement and Prospectus
for future reference.

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED ON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.

          THIS PROXY STATEMENT AND PROSPECTUS IS DATED MARCH 29, 2000.
<PAGE>

                               TABLE OF CONTENTS
                        PROXY STATEMENT AND PROSPECTUS




<TABLE>
<CAPTION>
                                                                                              PAGE
                                                                                             -----
<S>                                                                                          <C>
INTRODUCTION .............................................................................      1
  General ................................................................................      1
  Record Date; Share Information .........................................................      1
  Proxies ................................................................................      2
  Expenses of Solicitation ...............................................................      3
  Vote Required ..........................................................................      3
SYNOPSIS .................................................................................      4
  The Reorganization .....................................................................      4
  Fee Table ..............................................................................      4
  Tax Consequences of the Reorganization .................................................      6
  Comparison of California Series and California Tax-Free ................................      6
PRINCIPAL RISK FACTORS ...................................................................      7
THE REORGANIZATION .......................................................................      8
  The Proposal ...........................................................................      8
  The Board's Consideration ..............................................................      9
  The Reorganization Agreement ...........................................................     10
  Tax Aspects of the Reorganization ......................................................     12
  Description of Shares ..................................................................     13
  Capitalization Table (unaudited) .......................................................     13
  Appraisal Rights .......................................................................     13
COMPARISON OF INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS ...........................     13
  Investment Objectives and Policies .....................................................     13
  Investment Restrictions ................................................................     14
ADDITIONAL INFORMATION ABOUT CALIFORNIA SERIES AND CALIFORNIA
 TAX-FREE ................................................................................     15
  General ................................................................................     15
  Financial Information ..................................................................     15
  Management .............................................................................     15
  Description of Securities and Shareholder Inquiries ....................................     15
  Dividends, Distributions and Taxes .....................................................     15
  Purchases, Repurchases and Redemptions .................................................     15
MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE ..............................................     15
FINANCIAL STATEMENTS AND EXPERTS .........................................................     16
LEGAL MATTERS ............................................................................     16
AVAILABLE INFORMATION ....................................................................     16
OTHER BUSINESS ...........................................................................     16
Exhibit A - Agreement and Plan of Reorganization, dated January 26, 2000, by and between
 Multi-State, on behalf of California Series, and California Tax-Free ....................    A-1
Exhibit B - Prospectus of California Tax-Free dated February 22, 2000 ....................    B-1
</TABLE>

<PAGE>

          MORGAN STANLEY DEAN WITTER MULTI-STATE MUNICIPAL SERIES TRUST
                                CALIFORNIA SERIES
                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                                 (800) 869-NEWS

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

                         PROXY STATEMENT AND PROSPECTUS

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

                         SPECIAL MEETING OF SHAREHOLDERS
                            TO BE HELD JUNE 22, 2000


                                  INTRODUCTION


GENERAL

     This Proxy Statement and Prospectus is being furnished to the shareholders
of the California Series ("California Series"), a portfolio of Morgan Stanley
Dean Witter Multi-State Municipal Series Trust ("Multi-State"), an open-end
non-diversified management investment company, in connection with the
solicitation by the Board of Trustees of Multi-State (the "Board") of proxies to
be used at the Special Meeting of Shareholders of California Series to be held
in Conference Room A, Forty-Fourth Floor, Two World Trade Center, New York, New
York 10048 at 10:00 A.M., New York time, on June 22, 2000, and any adjournments
thereof (the "Meeting"). It is expected that the mailing of this Proxy Statement
and Prospectus will be made on or about April 5, 2000.

     At the Meeting, California Series shareholders ("Shareholders") will
consider and vote upon an Agreement and Plan of Reorganization, dated January
26, 2000 (the "Reorganization Agreement"), between Multi-State, on behalf of
California Series, and Morgan Stanley Dean Witter California Tax-Free Income
Fund ("California Tax-Free") pursuant to which substantially all of the assets
of California Series will be combined with those of California Tax-Free in
exchange for Class D shares of California Tax-Free. As a result of this
transaction, Shareholders will become shareholders of California Tax-Free and
will receive Class D shares of California Tax-Free equal to the value of their
holdings in California Series on the date of such transaction (the
"Reorganization"). The Class D shares to be issued by California Tax-Free
pursuant to the Reorganization (the "California Tax-Free Shares") will be issued
at net asset value without an initial sales charge. Further information relating
to California Tax-Free is set forth herein and in California Tax-Free's current
Prospectus, dated February 22, 2000 ("California Tax-Free's Prospectus"),
attached to this Proxy Statement and Prospectus and incorporated herein by
reference.

     The information concerning California Series contained herein has been
supplied by Multi-State and the information concerning California Tax-Free
contained herein has been supplied by California Tax-Free.


RECORD DATE; SHARE INFORMATION

     The Board has fixed the close of business on March 17, 2000 as the record
date (the "Record Date") for the determination of the Shareholders entitled to
notice of, and to vote at, the Meeting. As of the Record Date,


                                       1
<PAGE>

there were 9,035,886.451 shares of California Series issued and outstanding.
Shareholders on the Record Date are entitled to one vote per share on each
matter submitted to a vote at the Meeting. A majority of the outstanding shares
entitled to vote, represented in person or by proxy, will constitute a quorum
at the Meeting.

     No person was known to own of record or beneficially 5% or more of the
outstanding shares of California Series as of the Record Date. As of the Record
Date, the trustees and officers of Multi-State, as a group, owned less than 1%
of the outstanding shares of California Series.

     The following persons were known to own of record or beneficially 5% or
more of the outstanding shares of a Class of California Tax-Free as of the
Record Date: Class A -- Thomas J. McMurray Jr. and Gretha K. McMurray JTTEN, PO
Box 1032, Eureka, CA 95502-3032 (24.4%); Darrin M. Ginsberg & Heather J.
Ginsberg as TTEES of the Ginsberg, BAM. TR DTD 4/22/98 MUT Fund Acct, 2173
Ocean Way, Laguna Beach, CA 92651-3241 (18.6%); Harry Lewis & Janet J. Lewis,
TTEES F/T Harry & Janet Lewis Revocable TR DTD 3/29/95 A/C H1, PO Box 352,
Pebble Beach, CA 93953-0352 (11.1%); Michael A. Lopiano TTEE, Audrey R.H.
Lopiano TTEE, Lopiano 1982 PAM TR DTD 7/6/82, 3098 Seaview, Ventura, CA
93001-4242 (6.6%); Lynda Trelut & James Trelut JT TEN, 1617 El Dorado Dr.,
Gilroy, CA 95020-3754 (6.0%). Class C -- Glenn A. Wildman II, 2058 Colusa Way,
San Jose, CA 95130-1807 (8.0%); Donald H. Schmickrath & Melody Schmickrath,
TTEES O/T Schmickrath Family REV. Trust DTD 10/7/96, 12510 Barley Hill Rd., Los
Altos Hills, CA 94024-5211 (7.5%); Janice Pruett Gouveia, TTEE of the Dempsey
R. Parsley Trust DTD 2-13-91, 4713 Newport Avenue, San Diego, CA 92107-2204
(5.4%). Class D -- Robert H. Killen, TTEE for the Robert H. & Margaret R.
Killen Trust DTD 6/12/86, P.O. Box 547, South Pasadena, CA 91031-0547 (16.4%);
Herbert E. Hoover & Jean E. Hoover JTWROS, 4495 S. El Pomar Road, Templeton, CA
93465-8670 (11.0%); Nadine S., Robert J., & Vicki Rushakoff CO-TTES, F/T
Rushakoff Survivors Trust DTD 5/20/97, 221 Morningside Dr., San Francisco, CA
94132-3240 (9.2%); Morgan Stanley Dean Witter TR FSB Agent for American Baptist
Homes Foundation of the West Inc., TTEE FBO Stokes #2, P.O. Box 503, Jersey
City, NJ 07311 (9.0%); Donald B. Hicks & Sherlee N. Hicks JT TEN, 1019 Marina
Dr., Placentia, CA 92870-3706 (7.5%). As of the Record Date, the trustees and
officers of California Tax-Free, as a group, owned less than 1% of the
outstanding shares of California Tax-Free.


PROXIES

     The enclosed form of proxy, if properly executed and returned, will be
voted in accordance with the choice specified thereon. The proxy will be voted
in favor of the Reorganization Agreement unless a choice is indicated to vote
against or to abstain from voting on the Reorganization Agreement. The Board
knows of no business, other than that set forth in the Notice of Special
Meeting of Shareholders, to be presented for consideration at the Meeting.
However, the proxy confers discretionary authority upon the persons named
therein to vote as they determine on other business, not currently
contemplated, which may come before the Meeting. Abstentions and, if
applicable, broker "non-votes" will not count as votes in favor of the
Reorganization Agreement, and broker "non-votes" will not be deemed to be
present at the meeting for purposes of determining whether the Reorganization
Agreement has been approved. Broker "non-votes" are shares held in street name
for which the broker indicates that instructions have not been received from
the beneficial owners or other persons entitled to vote and for which the
broker does not have discretionary voting authority. If a Shareholder executes
and returns a proxy but fails to indicate how the votes should be cast, the
proxy will be voted in favor of the Reorganization Agreement. The proxy may be
revoked at any time prior to the voting thereof by: (i) delivering written
notice of revocation to the Secretary of Multi-State at Two World Trade Center,
New York, New York 10048; (ii) attending the Meeting and voting in person; or
(iii) completing and returning a new proxy (whether by mail or, as discussed
below, by touchtone telephone or the Internet) (if returned and received in
time to be voted). Attendance at the Meeting will not in and of itself revoke a
proxy.


                                       2
<PAGE>

     In the event that the necessary quorum to transact business or the vote
required to approve or reject the Reorganization Agreement is not obtained at
the Meeting, the persons named as proxies may propose one or more adjournments
of the Meeting to permit further solicitation of proxies. Any such adjournment
will require the affirmative vote of the holders of a majority of shares of
California Series present in person or by proxy at the Meeting. The persons
named as proxies will vote in favor of such adjournment those proxies which
they are entitled to vote in favor of the Reorganization Agreement and will
vote against any such adjournment those proxies required to be voted against
the Reorganization Agreement.


EXPENSES OF SOLICITATION

     All expenses of this solicitation, including the cost of preparing and
mailing this Proxy Statement and Prospectus, will be borne by California
Series, which expenses are expected to approximate $70,000. California Series
and California Tax-Free will bear all of their respective other expenses
associated with the Reorganization. In addition to the solicitation of proxies
by mail, proxies may be solicited by officers of Multi-State, and officers and
regular employees of Morgan Stanley Dean Witter Advisors Inc. ("MSDW Advisors"
or the "Investment Manager") and Morgan Stanley Dean Witter Trust FSB ("MSDW
Trust"), an affiliate of MSDW Advisors, personally or by mail, telephone,
telegraph or otherwise, without compensation therefor. Brokerage houses, banks
and other fiduciaries may be requested to forward soliciting material to the
beneficial owners of shares and to obtain authorization for the execution of
proxies.


     Shareholders whose shares are registered with MSDW Trust will be able to
vote their shares by touchtone telephone or by Internet by following the
instructions on the proxy card or on the Voting Information Card accompanying
this Proxy Statement and Prospectus. To vote by touchtone telephone,
Shareholders can call the toll-free number 1-800-690-6903. To vote by Internet,
Shareholders can access the websites www.msdwt.com or www.proxyvote.com.
Telephonic and Internet voting with MSDW Trust presently are not available to
Shareholders whose shares are held in street name.

     In certain instances, MSDW Trust, an affiliate of MSDW Advisors, may call
Shareholders to ask if they would be willing to have their votes recorded by
telephone. The telephone voting procedure is designed to authenticate
Shareholders' identities, to allow Shareholders to authorize the voting of
their shares in accordance with their instructions and to confirm that their
instructions have been recorded properly. No recommendation will be made as to
how a Shareholder should vote on the Reorganization Agreement other than to
refer to the recommendation of the Board. Multi-State, on behalf of California
Series, has been advised by counsel that these procedures are consistent with
the requirements of applicable law. Shareholders voting by telephone in this
manner will be asked for their social security number or other identifying
information and will be given an opportunity to authorize proxies to vote their
shares in accordance with their instructions. To ensure that the Shareholders'
instructions have been recorded correctly, they will receive a confirmation of
their instructions in the mail. A special toll-free number set forth in the
confirmation will be available in case the information contained in the
confirmation is incorrect. Although a Shareholder's vote may be taken by
telephone, each Shareholder will receive a copy of this Proxy Statement and
Prospectus and may vote by mail using the enclosed proxy card or by touchtone
telephone or the Internet as set forth above. The last proxy vote received in
time to be voted, whether by proxy card, touchtone telephone or Internet, will
be the vote that is counted and will revoke all previous votes by the
Shareholder.


VOTE REQUIRED


     Approval of the Reorganization Agreement by the Shareholders requires the
affirmative vote of a majority (i.e., more than 50%) of the shares of
California Series represented in person or by proxy and entitled to vote at the
Meeting, provided a quorum is present at the Meeting. If the Reorganization
Agreement is not approved by Shareholders, California Series will continue in
existence and the Board will consider alternative actions.


                                       3
<PAGE>

                                   SYNOPSIS


     The following is a synopsis of certain information contained in or
incorporated by reference in this Proxy Statement and Prospectus. This synopsis
is only a summary and is qualified in its entirety by the more detailed
information contained or incorporated by reference in this Proxy Statement and
Prospectus and the Reorganization Agreement. Shareholders should carefully
review this Proxy Statement and Prospectus and Reorganization Agreement in
their entirety and, in particular, California Tax-Free's Prospectus, which is
attached to this Proxy Statement and incorporated herein by reference.


THE REORGANIZATION


     The Reorganization Agreement provides for the transfer of substantially
all the assets of California Series, subject to stated liabilities, to
California Tax-Free in exchange for the California Tax-Free Shares. The
aggregate net asset value of the California Tax-Free Shares issued in the
exchange will equal the aggregate value of the net assets of California Series
received by California Tax-Free. On or after the closing date scheduled for the
Reorganization (the "Closing Date"), California Series will distribute the
California Tax-Free Shares received by California Series to Shareholders as of
the Valuation Date (as defined below under "The Reorganization Agreement") in
complete liquidation of California Series and California Series will thereafter
be dissolved as a portfolio of Multi-State under Massachusetts law. As a result
of the Reorganization, each Shareholder will receive that number of full and
fractional California Tax-Free Shares equal in value to such Shareholder's pro
rata interest in the net assets of California Series transferred to California
Tax-Free. Accordingly, as a result of the Reorganization, each Shareholder of
California Series will become a holder of Class D shares of California
Tax-Free. Shareholders holding their shares of California Series in certificate
form will be asked to surrender their certificates in connection with the
Reorganization. Shareholders who do not surrender their certificates prior to
the Closing Date will still receive their shares of California Tax-Free;
however, such Shareholders will not be able to redeem, transfer or exchange the
California Tax-Free Shares received until the old certificates have been
surrendered. The Board has determined that the interests of Shareholders will
not be diluted as a result of the Reorganization.


     FOR THE REASONS SET FORTH BELOW UNDER "THE REORGANIZATION -- THE BOARD'S
CONSIDERATION," THE BOARD, INCLUDING THE TRUSTEES WHO ARE NOT "INTERESTED
PERSONS" OF MULTI-STATE, ON BEHALF OF CALIFORNIA SERIES ("INDEPENDENT
TRUSTEES"), AS THAT TERM IS DEFINED IN THE INVESTMENT COMPANY ACT OF 1940, AS
AMENDED (THE "1940 ACT"), HAS CONCLUDED THAT THE REORGANIZATION IS IN THE BEST
INTERESTS OF CALIFORNIA SERIES AND ITS SHAREHOLDERS AND RECOMMENDS APPROVAL OF
THE REORGANIZATION AGREEMENT.



FEE TABLE


     California Series and California Tax-Free each pay expenses for management
of their assets, distribution of their shares and other services, and those
expenses are reflected in the net asset value per share of each fund. Class D
shares of California Tax-Free do not pay distribution-related fees; however,
the other three Classes offered by California Tax-Free pay fees for the
distribution of their shares. The following table briefly describes the fees
and expenses that a shareholder of California Series and a Class D shareholder
of California Tax-Free may pay if they buy and hold shares of each respective
fund. These expenses are deducted from each respective fund's assets and are
based on expenses paid by California Series for its fiscal year ended November
30, 1999, and by California Tax-Free for its fiscal year ended December 31,
1999. The table also sets forth pro forma fees for the surviving combined fund
(California Tax-Free) reflecting what the fee schedule would have been on
December 31, 1999, if the Reorganization had been consummated twelve (12)
months prior to that date and assuming Class D fees and expenses.


                                       4
<PAGE>

Shareholder Fees


<TABLE>
<CAPTION>
                                                                             CALIFORNIA     PRO FORMA
                                                             CALIFORNIA       TAX-FREE      COMBINED
                                                               SERIES         (CLASS D)     (CLASS D)
                                                           --------------   ------------   ----------
<S>                                                        <C>              <C>            <C>
MAXIMUM SALES CHARGE (LOAD) IMPOSED ON PURCHASES
 (AS A PERCENTAGE OF OFFERING PRICE)                         4.0%(1)        none           none
MAXIMUM SALES CHARGE (LOAD) IMPOSED ON REINVESTED
 DIVIDENDS                                                    none          none           none
MAXIMUM CONTINGENT DEFERRED SALES CHARGE (LOAD) (AS A
 PERCENTAGE OF THE LESSER OF ORIGINAL PURCHASE PRICE OR
 REDEMPTION PROCEEDS)                                         none          none           none
REDEMPTION FEES                                               none          none           none
EXCHANGE FEE                                                  none          none           none
</TABLE>

Annual Fund Operating Expenses (expenses that are deducted from fund assets)



<TABLE>
<CAPTION>
                                                                      CALIFORNIA     PRO FORMA
                                                     CALIFORNIA        TAX-FREE       COMBINED
                                                       SERIES         (CLASS D)      (CLASS D)
                                                  ---------------   -------------   -----------
<S>                                               <C>               <C>             <C>
MANAGEMENT FEES ...............................         0.35%            0.54%          0.53%
DISTRIBUTION AND SERVICE (12B-1) FEES .........         0.15%(2)         none           none
OTHER EXPENSES ................................         0.11%            0.05%          0.05%
TOTAL ANNUAL FUND OPERATING EXPENSES ..........         0.61%            0.59%          0.58%
</TABLE>

- ----------
(1)   Reduced for purchases of $25,000 and over.
(2)   The 12b-1 fee is accrued daily and payable monthly. The entire 12b-1 fee
      payable by California Series is characterized as a service fee within the
      meaning of National Association of Securities Dealers, Inc. ("NASD")
      guidelines and are payments made for personal service and/or maintenance
      of shareholder accounts.

EXAMPLE

     To attempt to show the effect of these expenses on an investment over
time, the hypotheticals shown below have been created. The Example assumes that
an investor invests $10,000 in either California Series or Class D shares of
California Tax-Free or the new combined fund (California Tax-Free), that the
investment has a 5% return each year and that the operating expenses for each
fund remain the same (as set forth in the chart above). Although a
shareholder's actual costs may be higher or lower, the tables below show a
shareholder's costs at the end of each period based on these assumptions
whether a shareholder sold or held his shares at the end of each period.



<TABLE>
<CAPTION>
                                            1 YEAR     3 YEARS     5 YEARS     10 YEARS
                                           --------   ---------   ---------   ---------
<S>                                        <C>        <C>         <C>         <C>
California Series ......................     $460        $588        $727      $1,132
California Tax-Free (Class D) ..........     $ 60        $189        $329      $  738
Pro Forma Combined (Class D) ...........     $ 59        $186        $324      $  726
</TABLE>

     The purpose of the foregoing fee table is to assist the investor or
shareholder in understanding the various costs and expenses that an investor or
shareholder in the fund will bear directly or indirectly. For a more complete
description of these costs and expenses, see "Comparison of California Series
and California Tax-Free -- Investment Management and Distribution Plan Fees,
Other Significant Fees, and Purchases, Exchanges and Redemptions" below.


                                       5
<PAGE>

TAX CONSEQUENCES OF THE REORGANIZATION

     As a condition to the Reorganization, Multi-State, on behalf of California
Series will receive an opinion of Mayer, Brown & Platt to the effect that the
Reorganization will constitute a tax-free reorganization for federal income tax
purposes, and that no gain or loss will be recognized by California Series or
the shareholders of California Series for federal income tax purposes as a
result of the transactions included in the Reorganization. For further
information about the tax consequences of the Reorganization, see "The
Reorganization -- Tax Aspects of the Reorganization" below.


COMPARISON OF CALIFORNIA SERIES AND CALIFORNIA TAX-FREE

     INVESTMENT OBJECTIVES AND POLICIES. California Series and California
Tax-Free have identical investment objectives. Both California Series and
California Tax-Free seek to provide a high level of current income exempt from
federal and California State income taxes consistent with the preservation of
capital.

     Both funds seek to achieve their investment objectives by investing at
least 80% of their respective total assets in securities, the interest of which
is exempt from federal and California state income taxes.

     The investment policies of both funds are essentially the same; the
principal differences between them are described under "Comparison of
Investment Objectives, Policies and Restrictions" below.

     Other than each fund's policy of investing at least 80% of its respective
assets in California tax-exempt securities, the investment policies of both
California Series and California Tax-Free are not fundamental and may be
changed by their respective Boards of Trustees.

     INVESTMENT MANAGEMENT AND DISTRIBUTION PLAN FEES.  California Series and
California Tax-Free obtain management services from MSDW Advisors. With respect
to California Series, the fund pays MSDW Advisors monthly compensation
calculated daily at an annual rate of 0.35% of the fund's average daily net
assets. With respect to California Tax-Free, the fund pays MSDW Advisors
monthly compensation calculated daily by applying the following annual rates to
the average net assets of the fund determined as of the close of each business
day: 0.55% to the portion of net assets not exceeding $500 million; 0.525% to
the portion of net assets exceeding $500 million but not exceeding $750
million; 0.50% to the portion of net assets exceeding $750 million but not
exceeding $1 billion; and 0.475% to the portion of the net assets exceeding $1
billion. Each class of shares of California Tax-Free is subject to the same
management fee rates.

     Multi-State has adopted a distribution plan ("Plan") pursuant to Rule
12b-1 under the 1940 Act whereby each series, including California Series,
reimburses the Distributor and others for the expenses of certain activities
and services incurred by them in connection with the distribution of each
respective series' shares. Reimbursement for these expenses is made in monthly
payments by, in this case, California Series, to the Distributor, which will in
no event exceed amounts equal to payment at the annual rate of 0.15% of the
average daily net assets of California Series. There are no 12b-1 fees
applicable to California Tax Free's Class D shares. For further information
relating to the 12b-1 fees applicable to each class of California Tax-Free's
shares, see the section entitled "Share Class Arrangements" in California
Tax-Free's Prospectus, attached hereto.

     OTHER SIGNIFICANT FEES. Both California Series and California Tax-Free pay
additional fees in connection with their operations, including legal, auditing,
transfer agent, trustees fees and custodial fees. See "Synopsis -- Fee Table"
above for the percentage of average net assets represented by such "Other
Expenses."

     PURCHASES, EXCHANGES AND REDEMPTIONS. Shares of California Series are sold
at net asset value plus an initial sales charge of up to 4.0%. The initial
sales charge is reduced for certain purchases. Shares of California Series may
be redeemed for cash without redemption or other charge at any time at the net
asset value per share next determined. Class D shares of California Tax-Free
are currently offered at net asset value and such


                                       6
<PAGE>

shares may be redeemed for cash without redemption or other charge at the net
asset value per share next determined. Normally, Class D shares of California
Tax-Free are offered only to a limited group of investors. Subsequent to the
Reorganization, all California Series shares will be designated Class D shares
of California Tax-Free. However, additional investments (except for
reinvestment of distributions received on shares acquired as a result of the
Reorganization) in Class D shares of California Tax-Free (or in Class D shares
of any other Morgan Stanley Dean Witter Fund) by Shareholders holding such
shares may only be made if those Shareholders are otherwise eligible to
purchase Class D shares. Class D shares acquired in the Reorganization may,
however, be exchanged for Class D shares of another Morgan Stanley Dean Witter
Fund pursuant to Class D's exchange privileges discussed below.

     California Tax-Free currently offers four classes of shares (Class A,
Class B, Class C and Class D) which differ principally in terms of sales
charges, distribution and service fees and ongoing expenses. For further
information relating to each of the classes of California Tax-Free's shares,
see the section entitled "Share Class Arrangements" in California Tax-Free's
Prospectus.

     Shares of California Series currently may be exchanged for shares of any
other Multi-State series, for Class A shares of any Morgan Stanley Dean Witter
Fund that offers its shares in more than one class, for shares of Morgan
Stanley Dean Witter Hawaii Municipal Trust, Morgan Stanley Dean Witter
Short-Term U.S. Treasury Trust, Morgan Stanley Dean Witter North American
Government Income Trust, Morgan Stanley Dean Witter Limited Term Municipal
Trust, Morgan Stanley Dean Witter Short-Term Bond Fund and for shares of the
five Morgan Stanley Dean Witter Funds that are money market funds. Class D
shares of California Tax-Free may be exchanged for Class D shares of any other
Morgan Stanley Dean Witter Fund that offers its shares in more than one class,
or any of Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust, Morgan
Stanley Dean Witter North American Government Income Trust, Morgan Stanley Dean
Witter Limited Term Municipal Trust, Morgan Stanley Dean Witter Short-Term Bond
Fund and the five Morgan Stanley Dean Witter Funds that are money market funds
(the foregoing funds are collectively referred to as the "Exchange Funds"),
without the imposition of an exchange fee.

     Both California Series and California Tax-Free provide telephone exchange
privileges to their shareholders. For greater details relating to exchange
privileges applicable to California Tax-Free, see the section entitled "How to
Exchange Shares" in California Tax-Free's Prospectus.

     Both California Series and California Tax-Free may redeem involuntarily,
at net asset value, most accounts valued at less than $100. However, both funds
offer a reinstatement privilege whereby a shareholder who has not previously
exercised such privilege whose shares have been redeemed or repurchased may,
within thirty-five days after the date of redemption or repurchase, reinstate
any portion or all of the proceeds thereof in shares of the same class from
which such shares were redeemed or repurchased.

     DIVIDENDS. California Series and California Tax-Free each declare income
dividends daily and pay dividends from net investment income monthly. Both
California Series and California Tax-Free distribute net capital gains, if any,
at least annually in December. Each, however, may determine either to
distribute or to retain all or part of any net long-term capital gains in any
year for reinvestment. With respect to both California Series and California
Tax-Free, dividends and capital gains distributions are automatically
reinvested in additional shares at net asset value unless the shareholder
elects to receive cash.


                            PRINCIPAL RISK FACTORS

     The share price or net asset value of California Tax-Free and California
Series will fluctuate with changes in the market value of their respective
portfolio securities. The market value of the funds' portfolio securities will
increase or decrease due to a variety of economic, market and political
factors, including changes in prevailing interest rates, which cannot be
predicted. The principal risks of an investment in either California


                                       7
<PAGE>

Tax-Free or California Series are the risks associated with their respective
fixed-income securities which primarily consist of municipal obligations. Fixed
income securities are subject to two types of risks: credit risk, and interest
rate risk.

     Credit risk refers to the possibility that the issuer of a security will
be unable or unwilling to make interest payments and/or repay the principal on
its debt. In the case of certain municipal obligations known as revenue bonds,
the credit risk refers to the possibility that the user fees from a project or
specified revenue source are insufficient to meet interest and/or principal
payment obligations or the credit impairment of the user. California Tax-Free
and California Series are subject to the added credit risk of concentrating
their investments in a single state - California. Because both funds
concentrate their investments in securities issued by California state and
local governments and government authorities, both funds will be significantly
affected by the political, economic and regulatory developments concerning
those issuers. Should any difficulties develop concerning California issuers'
abilities to pay principal and/or interest on their debt obligations, the value
and yield of both funds could be adversely affected. Interest rate risk refers
to fluctuations in the value of a fixed-income security resulting from changes
in the general level of interest rates. When the general level of interest
rates goes up, the prices of most fixed-income securities go down. When the
general level of interest rates goes down, the prices of most fixed-income
securities go up.

     Unlike California Tax-Free, California Series is classified as
"non-diversified" and, as such, its investments are not required to meet
certain diversification requirements under federal law. Compared with
California Tax-Free, California Series may invest a greater percentage of its
assets in the securities of an individual issuer. Thus, California Series'
assets may be concentrated in fewer securities than California Tax-Free. A
decline in the value of those investments may cause California Series' overall
value to decline to a greater degree than California Tax-Free.

     Both California Tax-Free and California Series may invest a portion of
their respective assets in inverse floating rate municipal obligations which
are obligations that are typically created through a division of a fixed rate
municipal obligation into two separate instruments, a short-term obligation and
a long-term obligation. The interest rates on inverse floating rate municipal
obligations generally move in the reverse direction of market interest rates.
Inverse floating rate municipal obligations offer the potential for higher
income than is available from fixed rate obligations of comparable maturity and
credit rating but they also carry greater risks. In particular, the prices of
inverse floating rate municipal obligations are more volatile, i.e., they
increase and decrease in response to changes in interest rates to a greater
extent than comparable fixed rate obligations.

     Both California Tax-Free and California Series may invest in municipal
lease obligations which are obligations issued by state and local agencies or
authorities to finance equipment and facilities. Certain lease obligations
contain clauses whereby future payments under the lease are dependent upon
annual or periodic legislative appropriations. If these legislative
appropriations do not occur, holders of such municipal lease obligations may
experience difficulty exercising their rights, including disposition of the
property. Both California Tax-Free and California Series may also invest in
futures obligations which are considered speculative in nature and involve
certain risks.

     The foregoing discussion is a summary of the principal risk factors. For a
more complete discussion of the risks of each fund, see "Principal Risks" and
"Additional Risk Information" in the Prospectus of Multi-State and in
California Tax-Free's Prospectus attached hereto and incorporated herein by
reference.

                              THE REORGANIZATION

THE PROPOSAL

     The Board of Trustees of Multi-State, on behalf of California Series,
including the Independent Trustees, having reviewed the financial position of
California Series and the prospects for achieving economies of scale


                                       8
<PAGE>

through the Reorganization and having determined that the Reorganization is in
the best interests of California Series and its Shareholders and that the
interests of Shareholders will not be diluted as a result thereof, recommends
approval of the Reorganization by Shareholders of California Series.


THE BOARD'S CONSIDERATION

     At a meeting held on January 26, 2000, the Board, including all of the
Independent Trustees, unanimously approved the Reorganization Agreement and
determined to recommend that Shareholders approve the Reorganization Agreement.
In reaching this decision, the Board made an extensive inquiry into a number of
factors, particularly the comparative expenses currently incurred in the
operations of California Series and the Class D shares of California Tax-Free.
The Board also considered other factors, including, but not limited to: the
small asset base of California Series which may affect the long-term economic
viability of the fund because of higher costs and disadvantageous economies of
scale; the general compatibility of the investment objectives, policies,
restrictions and portfolios of California Series and California Tax-Free; the
terms and conditions of the Reorganization which would affect the price of
shares to be issued in the Reorganization; the tax-free nature of the
Reorganization; and any direct or indirect costs to be incurred by California
Series and California Tax-Free in connection with the Reorganization.

     In recommending the Reorganization to Shareholders, the Board of
Multi-State, on behalf of California Series, considered that the Reorganization
would have the following benefits to Shareholders:

     1. Once the Reorganization is consummated, the expenses which would be
borne by Class D shareholders of the "combined fund" are expected to be
slightly lower on a percentage basis than the expenses per share of California
Series although the investment management fee of California Tax-Free is higher
than the investment management fee of California Series. The combined fund's
expenses would be lower in part because Class D shares of California Tax-Free
bear no 12b-1 fees, whereas California Series is subject to an annual 12b-1 fee
of up to 0.15% of its average net assets. Furthermore, the estimated current
rate of other expenses to be paid by Class D of the surviving California
Tax-Free (0.05% of average daily net assets) would be lower than the rate of
other expenses currently paid by California Series (0.11% of average daily net
assets). In addition, to the extent that the Reorganization would result in
Shareholders becoming shareholders of a combined larger fund, further economies
of scale could be achieved since various fixed expenses (e.g., auditing and
legal) can be spread over a larger number of shares. The Board noted that the
expense ratio for California Series was higher (0.61% for its fiscal year ended
November 30, 1999) than the expense ratio for Class D shares of California
Tax-Free (0.59% for its fiscal year ended December 31, 1999).

     2. Shareholders will be able to participate in an expanded diversified
portfolio of California municipal issuers through investment in California
Tax-Free.

     3. Shareholders would have the ability to exchange their Class D shares of
California Tax-Free acquired as a result of the Reorganization into Class D
shares of any Morgan Stanley Dean Witter Multi-Class Fund. Currently,
Shareholders may only exchange into Class A shares of any Morgan Stanley Dean
Witter Multi-Class Fund. Class D shares bear lower expenses than Class A
shares.

     4. The Reorganization is intended to qualify as a tax-free reorganization
for Federal income tax purposes, pursuant to which no gain or loss will be
recognized by California Series or its Shareholders for Federal income tax
purposes as a result of transactions included in the Reorganization.

     5. The Board also took into consideration that absent the Reorganization,
California Tax-Free will continue to compete for investor funds with California
Series and that it appeared unlikely that California


                                       9
<PAGE>

Series would experience a material growth in assets in the future. The
Reorganization should allow for more concentrated selling efforts to the
benefit of both California Series and California Tax-Free shareholders and
avoid the inefficiencies associated with the operation and distribution of two
similar funds through the same sales organization.

     The Board of Trustees of California Tax-Free, including a majority of the
Independent Trustees of California Tax-Free, also have determined that the
Reorganization is in the best interests of California Tax-Free and its
shareholders and that the interests of existing shareholders of California
Tax-Free will not be diluted as a result thereof. The transaction will enable
California Tax-Free to acquire investment securities which are consistent with
California Tax-Free's investment objective, without the costs attendant to the
purchase of such securities in the market. Also, the addition of assets to
California Tax-Free's portfolio may cause California Tax-Free to reach a lower
breakpoint rate reduction in the investment management fee. Furthermore, like
the Shareholders of California Series, the shareholders of California Tax-Free
may also realize an intangible benefit in having the Morgan Stanley Dean Witter
sales organization concentrate its selling efforts on one rather than two
similar funds, which may result in further economies of scale. Finally, the
Board considered that even if the benefits enumerated above are not realized,
the costs to the Fund are sufficiently minor to warrant taking the opportunity
to realize those benefits.


THE REORGANIZATION AGREEMENT

     The terms and conditions under which the Reorganization would be
consummated, as summarized below, are set forth in the Reorganization
Agreement. This summary is qualified in its entirety by reference to the
Reorganization Agreement, a copy of which is attached as Exhibit A to this
Proxy Statement and Prospectus.

     The Reorganization Agreement provides that (i) California Series will
transfer all of its assets, including portfolio securities, cash (other than
cash amounts retained by California Series as a "Cash Reserve" in the amount
sufficient to discharge its liabilities not discharged prior to the Valuation
Date (as defined below) and for expenses of the dissolution), cash equivalents
and receivables to California Tax-Free on the Closing Date in exchange for the
assumption by California Tax-Free of stated liabilities of California Series,
including all expenses, costs, charges and reserves, as reflected on an
unaudited statement of assets and liabilities of California Series prepared by
the Treasurer of Multi-State, on behalf of California Series, as of the
Valuation Date (as defined below) in accordance with generally accepted
accounting principles consistently applied from the prior audited period, and
the delivery of the California Tax-Free Shares; (ii) such California Tax-Free
Shares would be distributed to Shareholders on the Closing Date or as soon as
practicable thereafter; (iii) California Series would be dissolved; and (iv)
the outstanding shares of California Series would be canceled.

     The number of California Tax-Free Shares to be delivered to California
Series will be determined by dividing the aggregate net asset value of the
shares of California Series acquired by California Tax-Free by the net asset
value per share of the Class D shares of California Tax-Free; these values will
be calculated as of the close of business of the New York Stock Exchange on the
third business day following the receipt of the requisite approval by
Shareholders of the Reorganization Agreement or at such other time as
California Series and California Tax-Free may agree (the "Valuation Date"). As
an illustration, assume that on the Valuation Date, the shares of California
Series had an aggregate net asset value (not including any Cash Reserve of
California Series) of $100,000. If the net asset value per Class D share of
California Tax-Free were $10 per share at the close of business on the
Valuation Date, the number of Class D shares of California Tax-Free to be
issued would be 10,000 ($100,000  (divided by)  $10). These 10,000 Class D
shares of California Tax-Free would be distributed to the former shareholders
of California Series. This example is given for illustration purposes only and
does not bear any relationship to the dollar amounts or shares expected to be
involved in the Reorganization.


                                       10
<PAGE>

     On the Closing Date or as soon as practicable thereafter, California
Series will distribute pro rata to its Shareholders of record as of the close
of business on the Valuation Date, the California Tax-Free Shares it receives.
Each Shareholder will receive Class D shares of California Tax-Free that
corresponds to the shares of California Series currently held by that
Shareholder. California Tax-Free will cause its transfer agent to credit and
confirm an appropriate number of California Tax-Free Shares to each
Shareholder. Certificates for California Tax-Free Shares will be issued only
upon written request of a Shareholder and only for whole shares, with
fractional shares credited to the name of the Shareholder on the books of
California Tax-Free. Shareholders who wish to receive certificates representing
their California Tax-Free Shares must, after receipt of their confirmations,
make a written request to California Tax-Free's transfer agent Morgan Stanley
Dean Witter Trust FSB, Harborside Financial Center, Jersey City, New Jersey
07311. Shareholders of California Series holding their shares in certificate
form will be asked to surrender such certificates in connection with the
Reorganization. Shareholders who do not surrender their certificates prior to
the Closing Date will still receive their shares of California Tax-Free;
however, such Shareholders will not be able to redeem, transfer or exchange the
California Tax-Free Shares received until the old certificates have been
surrendered.

     The Closing Date will be the next business day following the Valuation
Date. The consummation of the Reorganization is contingent upon the approval of
the Reorganization by the Shareholders and the receipt of the other opinions
and certificates set forth in Sections 6, 7 and 8 of the Reorganization
Agreement and the occurrence of the events described in those Sections, certain
of which may be waived by California Series or California Tax-Free. The
Reorganization Agreement may be amended in any mutually agreeable manner. All
expenses of this solicitation, including the cost of preparing and mailing this
Proxy Statement and Prospectus, will be borne by California Series, which
expenses are expected to approximate $70,000. California Series and California
Tax-Free will bear all of their respective other expenses associated with the
Reorganization.

     The Reorganization Agreement may be terminated and the Reorganization
abandoned at any time, before or after approval by Shareholders or by mutual
consent of Multi-State, on behalf of California Series, and California
Tax-Free. In addition, either party may terminate the Reorganization Agreement
upon the occurrence of a material breach of the Reorganization Agreement by the
other party or if, by September 30, 2000, any condition set forth in the
Reorganization Agreement has not been fulfilled or waived by the party entitled
to its benefits.

     Under the Reorganization Agreement, within one year after the Closing
Date, Multi-State, on behalf of California Series, shall: either pay or make
provision for all of its liabilities and distribute any remaining amount of the
Cash Reserve (after paying or making provision for such liabilities and the
estimated cost of making the distribution) to former Shareholders of California
Series that received California Tax-Free Shares. California Series shall be
dissolved as a portfolio of Multi-State under Massachusetts law promptly
following the distributions of shares of California Tax-Free to Shareholders of
record of California Series.

     The effect of the Reorganization is that Shareholders who vote their
shares in favor of the Reorganization Agreement are electing to sell their
shares of California Series (at net asset value on the Valuation Date
calculated after subtracting any Cash Reserve) and reinvest the proceeds in
California Tax-Free Shares at net asset value and without recognition of
taxable gain or loss for Federal income tax purposes. See "Tax Aspects of the
Reorganization" below. As noted in "Tax Aspects of the Reorganization" below,
if California Series recognizes net gain from the sale of securities prior to
the Closing Date, such gain, to the extent not offset by capital loss
carryforwards, will be distributed to Shareholders prior to the Closing Date
and will be taxable to Shareholders as capital gain.

     Shareholders will continue to be able to redeem their shares of California
Series at net asset value next determined after receipt of the redemption
request until the close of business on the business day next preceding the
Closing Date. Redemption requests received by Multi-State, on behalf of
California Series, thereafter will be treated as requests for redemption of
shares of California Tax-Free.


                                       11
<PAGE>

TAX ASPECTS OF THE REORGANIZATION

     At least one but not more than 20 business days prior to the Valuation
Date, California Series will declare and pay a dividend or dividends which,
together with all previous such dividends, will have the effect of distributing
to Shareholders all of California Series' investment company taxable income for
all periods since the inception of California Series through and including the
Valuation Date (computed without regard to any dividends paid deduction), and
all of California Series' net capital gain, if any, realized in such periods
(after reduction for any capital loss carryforward).

     The Reorganization is intended to qualify for Federal income tax purposes
as a tax-free reorganization under Section 368(a)(1)(C) of the Internal Revenue
Code of 1986, as amended (the "Code").

     As a condition to the Reorganization, Multi-State, on behalf of California
Series, and California Tax-Free will receive an opinion of Mayer, Brown & Platt
to the effect that, based on certain assumptions, facts, the terms of the
Reorganization Agreement and representations set forth in the Reorganization
Agreement or otherwise provided by Multi-State, on behalf of California Series,
and California Tax-Free (including a representation to the effect that
California Tax-Free has no plan or intention to sell or otherwise dispose of
more than fifty percent of the assets of California Series acquired in the
Reorganization except for dispositions made in the ordinary course of
business):

     1. The transfer of California Series' assets in exchange for the
California Tax-Free Shares and the assumption by California Tax-Free of certain
stated liabilities of California Series followed by the distribution by
California Series of the California Tax-Free Shares to Shareholders in exchange
for their California Series shares pursuant to and in accordance with the terms
of the Reorganization Agreement will constitute a "reorganization" within the
meaning of Section 368(a)(1)(C) of the Code, and California Series and
California Tax-Free will each be a "party to a reorganization" within the
meaning of Section 368(b) of the Code;

     2. No gain or loss will be recognized by California Tax-Free upon the
receipt of the assets of California Series solely in exchange for the
California Tax-Free Shares and the assumption by California Tax-Free of the
stated liabilities of California Series;

     3. No gain or loss will be recognized by California Series upon the
transfer of the assets of California Series to California Tax-Free in exchange
for the California Tax-Free Shares and the assumption by California Tax-Free of
the stated liabilities or upon the distribution of California Tax-Free Shares
to Shareholders in exchange for their California Series shares;

     4. No gain or loss will be recognized by Shareholders upon the exchange of
the shares of California Series for the California Tax-Free Shares;

     5. The aggregate tax basis for the California Tax-Free Shares received by
each of the Shareholders pursuant to the Reorganization will be the same as the
aggregate tax basis of the shares in California Series held by each such
Shareholder immediately prior to the Reorganization;

     6. The holding period of the California Tax-Free Shares to be received by
each Shareholder will include the period during which the shares in California
Series surrendered in exchange therefor were held (provided such shares in
California Series were held as capital assets on the date of the
Reorganization);

     7. The tax basis of the assets of California Series acquired by California
Tax-Free will be the same as the tax basis of such assets of California Series
immediately prior to the Reorganization; and

     8. The holding period of the assets of California Series in the hands of
California Tax-Free will include the period during which those assets were held
by California Series.


                                       12
<PAGE>

     SHAREHOLDERS SHOULD CONSULT THEIR TAX ADVISORS REGARDING THE EFFECT, IF
ANY, OF THE PROPOSED TRANSACTION IN LIGHT OF THEIR INDIVIDUAL CIRCUMSTANCES.
BECAUSE THE FOREGOING DISCUSSION ONLY RELATES TO THE FEDERAL INCOME TAX
CONSEQUENCES OF THE PROPOSED TRANSACTION, SHAREHOLDERS SHOULD ALSO CONSULT
THEIR TAX ADVISORS AS TO STATE AND LOCAL TAX CONSEQUENCES, IF ANY, OF THE
PROPOSED TRANSACTION.


DESCRIPTION OF SHARES

     Class D shares of California Tax-Free to be issued pursuant to the
Reorganization Agreement will, when issued, be fully paid and non-assessable by
California Tax-Free and transferable without restrictions and will have no
preemptive rights. As stated above, Class D shares of California Tax-Free are
not subject to any sales charge on purchase or redemption or any 12b-1 fee.


CAPITALIZATION TABLE (UNAUDITED)

     The following table sets forth the capitalization of California Tax-Free
and California Series as of January 31, 2000 and on a pro forma combined basis
as if the Reorganization had occurred on that date:



<TABLE>
<CAPTION>
                                                                                             NET ASSET
                                                                                SHARES         VALUE
                                                             NET ASSETS      OUTSTANDING     PER SHARE
                                                           --------------   -------------   ----------
<S>                                                        <C>              <C>             <C>
California Series ......................................   $ 92,310,545       9,264,475      $  9.96
California Tax-Free:
 (Class A) .............................................   $  6,146,618         531,265      $ 11.57
 (Class B) .............................................   $745,801,215      64,120,147      $ 11.63
 (Class C) .............................................   $ 12,533,369       1,077,411      $ 11.63
 (Class D) .............................................   $    917,307          79,072      $ 11.60
Total California Tax-Free (Class A -- D) ...............   $765,398,509              --           --
Combined Fund (pro forma) (California Tax-Free
after Reorganization)
 (Class A) .............................................   $  6,146,618         531,265      $ 11.57
 (Class B) .............................................   $745,801,215      64,120,147      $ 11.63
 (Class C) .............................................   $ 12,533,369       1,077,411      $ 11.63
 (Class D) .............................................   $ 93,227,852       8,036,878      $ 11.60
Total Combined Fund (pro forma) (Class A -- D) .........   $857,709,054              --           --

</TABLE>

APPRAISAL RIGHTS

     Shareholders will have no appraisal rights in connection with the
Reorganization.


        COMPARISON OF INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS


INVESTMENT OBJECTIVES AND POLICIES

     California Series and California Tax-Free have identical investment
objectives and similar investment policies. Both California Series and
California Tax-Free seek to provide a high level of current income exempt from
both federal and California state income taxes, consistent with preservation of
capital.

     Both California Series and California Tax-Free invest at least 80% of
their assets in securities that pay interest exempt from federal and California
income tax in accordance with their respective investment objectives set forth
above. Both California Series and California Tax-Free invest in investment
grade municipal


                                       13
<PAGE>

obligations (municipal bonds, notes or commercial paper), however, municipal
bonds must be rated within the four highest grades by Moody's Investors Service
("Moody's") or Standard & Poor's Corporation ("S&P") or Fitch Investors
Service, LP ("Fitch"), municipal notes within the two highest grades by
Moody's, S&P or Fitch and municipal commercial paper within the highest grade
by Moody's, S&P and Fitch. Unrated securities may only be purchased if such
securities are judged by the Investment Manager to be of comparable quality to
the rated securities described above.

     Both California Series and California Tax-Free may invest up to 10% of
their respective assets in inverse floating rate municipal obligations. The
interest rates on these obligations generally move in the reverse direction of
market interest rates. If market interest rates fall, the interest rates on the
obligations will increase and if market interest rates increase, the interest
rate on the obligations will fall.

     Both California Series and California Tax-Free may invest up to 20% of
their respective assets in taxable money market instruments and tax-exempt
securities of other states and municipalities.

     California Series may invest any amount of its assets in securities that
pay interest subject to the "alternative minimum tax" ("AMT") with the result
that some taxpayers may have to pay tax on income distributions from the
California Series. California Tax-Free may only invest up to 20% of its assets
in securities subject to the AMT unless the fund has adopted a temporary
defensive posture as set forth below.

     Both California Series and California Tax-Free may take temporary
"defensive" positions that are inconsistent with each fund's principal
investment strategies in attempting to respond to adverse market conditions in
which any amount of their respective assets may be invested in taxable money
market securities or in tax-exempt municipal obligations issued by states other
than California where interest on such obligations would normally be exempt
from federal income tax but not from California income tax. In addition, during
such a defensive posture, California Tax-Free may also invest any amount of its
assets in tax-exempt securities subject to the AMT.

     Both California Series and California Tax-Free may (i) purchase securities
on a when-issued or delayed delivery basis, (ii) purchase or sell securities on
a forward commitment basis, (iii) purchase variable and floating rate municipal
obligations, (iv) enter into repurchase agreements subject to certain
procedures designed to minimize risks associated with such agreements, (v)
purchase industrial revenue bonds, including lease obligations, and private
activity bonds, (vi) invest in zero coupon securities, (vii) lend their
portfolio securities and (viii) enter into options and futures transactions.

     The investment policies of both California Series and California Tax-Free
are not fundamental and may be changed by their respective Boards. However, the
policy of California Series and California Tax-Free of investing at least 80%
of their respective assets in California tax-exempt securities is fundamental
and may not be changed without the approval of each fund's respective
shareholders. The foregoing discussion is a summary of the principal
differences and similarities between the investment policies of the funds. For
a more complete discussion of each fund's policies, see "Principal Investment
Strategies" and "Additional Investment Strategy Information" in California
Tax-Free's prospectus and "Principal Investment Strategy" and "Additional
Investment Strategy Information" in Multi-State's Prospectus; and "Description
of the Fund and Its Investments and Risks" in California Tax-Free's Statement
of Additional Information and "Description of the Fund and the Investments and
Risks of the Series" in Multi-State's Statement of Additional Information.


INVESTMENT RESTRICTIONS

     The investment restrictions adopted by California Series and California
Tax-Free as fundamental policies are substantially similar and are summarized
under the caption "Description of the Fund and Its Investments and Risks --
Fund Policies/Investment Restrictions" in their respective Statements of
Additional Information.


                                       14
<PAGE>

A fundamental investment restriction cannot be changed without the vote of the
majority of the outstanding voting securities of a fund, as defined in the 1940
Act. The material differences are as follows: (a) California Tax-Free may not,
as to 75% of its total assets, invest more than 5% of the value of its total
assets in the securities of any one issuer (other than U.S. Government
securities); California Series, because it is a non-diversified fund, has no
such investment restriction but limits its investments of 5% or more in the
securities of any one issuer as to 50% of its total assets in order to qualify
as a regulated investment company under Subchapter M of the Code; and (b)
California Tax-Free may not purchase more than 10% of all outstanding taxable
debt securities of any one issuer (other than obligations issued or guaranteed
by the U.S. Government or its agencies or instrumentalities, or by the State of
California or its political subdivisions); California Series has no such
investment restriction.


                ADDITIONAL INFORMATION ABOUT CALIFORNIA SERIES
                            AND CALIFORNIA TAX-FREE


GENERAL

     For a discussion of the organization and operation of California Tax-Free
and California Series, see "Fund Management" and "Investment Objective" in
their respective Prospectuses.


FINANCIAL INFORMATION

     For certain financial information about California Tax-Free and California
Series, see "Financial Highlights" and "Past Performance" in their respective
Prospectuses.


MANAGEMENT

     For information about the respective Board of Trustees, Investment
Manager, and the Distributor of California Tax-Free and California Series, see
"Fund Management" in their respective Prospectuses.


DESCRIPTION OF SECURITIES AND SHAREHOLDER INQUIRIES

     For a description of the nature and most significant attributes of shares
of California Series and California Tax-Free, and information regarding
shareholder inquiries, see "Capital Stock and Other Securities" in their
respective Statements of Additional Information.


DIVIDENDS, DISTRIBUTIONS AND TAXES

     For a discussion of California Tax-Free's and California Series' policies
with respect to dividends, distributions and taxes, see "Distributions" and
"Tax Consequences" in their respective Prospectuses as well as the discussion
herein under "Synopsis -- Purchases, Exchanges and Redemptions."


PURCHASES, REPURCHASES AND REDEMPTIONS

     For a discussion of how California Tax-Free's and California Series'
shares may be purchased, repurchased and redeemed, see "How to Buy Shares,"
"How to Exchange Shares" and "How to Sell Shares" in their respective
Prospectuses.


                  MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE

     For a discussion of California Tax-Free's performance, see management's
letter to shareholders in its Annual Report for its fiscal year ended December
31, 1999 accompanying this Proxy Statement and Prospectus. For a discussion of
the performance of California Series, see Multi-State's Annual Report for its
fiscal year ended November 30, 1999.


                                       15
<PAGE>

                       FINANCIAL STATEMENTS AND EXPERTS

     The financial statements of California Tax-Free, for the year ended
December 31, 1999, and California Series, for the year ended November 30, 1999
that are incorporated by reference in the Statement of Additional Information
relating to the Registration Statement on Form N-14 of which this Proxy
Statement and Prospectus forms a part, have been audited by
PricewaterhouseCoopers LLP, independent accountants. The financial statements
have been incorporated by reference in reliance upon such reports given upon
the authority of PricewaterhouseCoopers LLP as experts in accounting and
auditing.


                                 LEGAL MATTERS

     Certain legal matters concerning the issuance of shares of California
Tax-Free will be passed upon by Mayer, Brown & Platt, New York, New York. Such
firm will rely on Massachusetts counsel as to matters of Massachusetts law.


                             AVAILABLE INFORMATION

     Additional information about California Series and California Tax-Free is
available, as applicable, in the following documents which are incorporated
herein by reference: (i) California Tax-Free's Prospectus dated February 22,
2000, attached to this Proxy Statement and Prospectus, which Prospectus forms a
part of Post-Effective Amendment No. 18 to California Tax-Free's Registration
Statement on Form N-1A (File Nos. 2-91103; 811-4020); (ii) California
Tax-Free's Annual Report for its fiscal year ended December 31, 1999,
accompanying this Proxy Statement and Prospectus; (iii) Multi-State's
Prospectus dated February 25, 2000, which Prospectus forms a part of
Post-Effective Amendment No. 12 to Multi-State's Registration Statement on Form
N-1A (File Nos. 33-37562; 811-6208); and (iv) Multi-State's Annual Report for
its fiscal year ended November 30, 1999. The foregoing documents may be
obtained without charge by calling (800) 869-NEWS (toll-free).

     California Series and California Tax-Free are subject to the informational
requirements of the Securities Exchange Act of 1934, as amended, and in
accordance therewith, file reports and other information with the Commission.
Proxy material, reports and other information about California Series and
California Tax-Free which are of public record can be inspected and copied at
public reference facilities maintained by the Commission at Room 1204,
Judiciary Plaza, 450 Fifth Street, NW, Washington, D.C. 20549 and certain of
its regional offices, and copies of such materials can be obtained at
prescribed rates from the Public Reference Branch, Office of Consumer Affairs
and Information Services, Securities and Exchange Commission, Washington, D.C.
20549.


                                OTHER BUSINESS

     Management of California Series knows of no business other than the
matters specified above which will be presented at the Meeting. Since matters
not known at the time of the solicitation may come before the Meeting, the
proxy as solicited confers discretionary authority with respect to such matters
as properly come before the Meeting, including any adjournment or adjournments
thereof, and it is the intention of the persons named as attorneys-in-fact in
the proxy to vote this proxy in accordance with their judgment on such matters.



                                      By Order of the Board of Trustees


                                      Barry Fink,
                                      Secretary

March 31, 2000

                                       16

<PAGE>

                                                                      EXHIBIT A


                     AGREEMENT AND PLAN OF REORGANIZATION

     THIS AGREEMENT AND PLAN OF REORGANIZATION ("Agreement") is made as of this
26th day of January, 2000, by and between MORGAN STANLEY DEAN WITTER CALIFORNIA
TAX-FREE INCOME FUND, a Massachusetts business trust ("California Tax-Free")
and MORGAN STANLEY DEAN WITTER MULTI-STATE MUNICIPAL SERIES TRUST, a
Massachusetts business trust ("Multi-State"), on behalf of its series,
CALIFORNIA SERIES ("California Series"). (Where appropriate, references to
California Series mean Multi-State, on behalf of California Series.)

     This Agreement is intended to be and is adopted as a "plan of
reorganization" within the meaning of Treas. Reg. 1.368-2(g), for a
reorganization under Section 368(a)(1) of the Internal Revenue Code of 1986, as
amended (the "Code"). The reorganization ("Reorganization") will consist of the
transfer to California Tax-Free of substantially all of the assets of
California Series in exchange for the assumption by California Tax-Free of all
stated liabilities of California Series and the issuance by California Tax-Free
of Class D shares of beneficial interest, par value $0.01 per share (the
"California Tax-Free Shares"), to be distributed, after the Closing Date
hereinafter referred to, to the shareholders of California Series in
liquidation of California Series as provided herein, all upon the terms and
conditions hereinafter set forth in this Agreement.

     In consideration of the premises and of the covenants and agreements
hereinafter set forth, the parties hereto covenant and agree as follows:

1. THE REORGANIZATION AND LIQUIDATION OF CALIFORNIA SERIES

     1.1 Subject to the terms and conditions herein set forth and on the basis
of the representations and warranties contained herein, California Series
agrees to assign, deliver and otherwise transfer the California Series Assets
(as defined in paragraph 1.2) to California Tax-Free and California Tax-Free
agrees in exchange therefor to assume all of California Series stated
liabilities on the Closing Date as set forth in paragraph 1.3(a) and to deliver
to California Series the number of California Tax-Free Shares, including
fractional California Tax-Free Shares, determined in the manner set forth in
paragraph 2.3. Such transactions shall take place at the closing provided for
in paragraph 3.1 ("Closing").

     1.2 (a) The "California Series Assets" shall consist of all property,
including without limitation, all cash (other than the "Cash Reserve" (as
defined in paragraph 1.3(b)), cash equivalents, securities and dividend and
interest receivables owned by California Series, and any deferred or prepaid
expenses shown as an asset on California Series' books on the Valuation Date.

     (b) On or prior to the Valuation Date, Multi-State will provide California
Tax-Free with a list of all of California Series assets to be assigned,
delivered and otherwise transferred to California Tax-Free and of the stated
liabilities to be assumed by California Tax-Free pursuant to this Agreement.
California Series reserves the right to sell any of the securities on such list
but will not, without the prior approval of California Tax-Free, acquire any
additional securities other than securities of the type in which California
Tax-Free is permitted to invest and in amounts agreed to in writing by
California Tax-Free. California Tax-Free will, within a reasonable time prior
to the Valuation Date, furnish California Series with a statement of California
Tax-Free's investment objectives, policies and restrictions and a list of the
securities, if any, on the list referred to in the first sentence of this
paragraph that do not conform to California Tax-Free's investment objective,
policies and restrictions. In the event that California Series holds any
investments that California Tax-Free is not permitted to hold, California
Series will dispose of such securities on or prior to the Valuation Date. In
addition, if it is determined that the portfolios of California Series and
California Tax-Free, when aggregated, would contain investments


                                      A-1
<PAGE>

exceeding certain percentage limitations imposed upon California Tax-Free with
respect to such investments, California Series if requested by California
Tax-Free will, on or prior to the Valuation Date, dispose of and/or reinvest a
sufficient amount of such investments as may be necessary to avoid violating
such limitations as of the Closing Date (as defined in paragraph 3.1).

     1.3 (a) California Series will endeavor to discharge all of its
liabilities and obligations on or prior to the Valuation Date. California
Tax-Free will assume all stated liabilities, which includes, without
limitation, all expenses, costs, charges and reserves reflected on an unaudited
Statement of Assets and Liabilities of California Series prepared by the
Treasurer of Multi-State, on behalf of California Series, as of the Valuation
Date in accordance with generally accepted accounting principles consistently
applied from the prior audited period.

     (b) On the Valuation Date, California Series may establish a cash reserve,
which shall not exceed 5% of California Series' net assets as of the close of
business on the Valuation Date ("Cash Reserve") to be retained by California
Series and used for the payment of its liabilities not discharged prior to the
Valuation Date and for the expenses of dissolution.

     1.4 In order for California Series to comply with Section 852(a)(1) of the
Code and to avoid having any investment company taxable income or net capital
gain (as defined in Sections 852(b)(2) and 1222(11) of the Code, respectively)
in the short taxable year ending with its dissolution, California Series will
on or before the Valuation Date (a) declare a dividend in an amount large
enough so that it will have declared dividends of all of its investment company
taxable income and net capital gain, if any, for such taxable year (determined
without regard to any deduction for dividends paid) and (b) distribute such
dividend.

     1.5 On the Closing Date or as soon as practicable thereafter, California
Series will distribute California Tax-Free Shares received by California Series
pursuant to paragraph 1.1 pro rata to its shareholders of record determined as
of the close of business on the Valuation Date ("California Series
Shareholders"). Each California Series Shareholder will receive Class D shares
of California Tax-Free. Such distribution will be accomplished by an
instruction, signed by the Secretary of Multi-State, to transfer California
Tax-Free Shares then credited to California Series' account on the books of
California Tax-Free to open accounts on the books of California Tax-Free in the
names of the California Series Shareholders and representing the respective pro
rata number of California Tax-Free Shares due such California Series
Shareholders. All issued and outstanding shares of California Series
simultaneously will be canceled on California Series' books; however, share
certificates representing interests in California Series will represent a
number of California Tax-Free Shares after the Closing Date as determined in
accordance with paragraph 2.3. California Tax-Free will issue certificates
representing California Tax-Free Shares in connection with such exchange only
upon the written request of a California Series Shareholder.

     1.6 Ownership of California Tax-Free Shares will be shown on the books of
California Tax-Free's transfer agent. California Tax-Free Shares will be issued
in the manner described in California Tax-Free's current Prospectus and
Statement of Additional Information.

     1.7 Any transfer taxes payable upon issuance of California Tax-Free Shares
in a name other than the registered holder of California Tax-Free Shares on
California Series' books as of the close of business on the Valuation Date
shall, as a condition of such issuance and transfer, be paid by the person to
whom California Tax-Free Shares are to be issued and transferred.

     1.8 Any reporting responsibility of Multi-State, on behalf of California
Series, is and shall remain the responsibility of Multi-State up to and
including the date on which California Series is dissolved pursuant to
paragraph 1.9.

     1.9 Within one year after the Closing Date, California Series shall pay or
make provision for the payment of all its liabilities and taxes, and distribute
to the shareholders of California Series as of the close of business


                                      A-2
<PAGE>

on the Valuation Date any remaining amount of the Cash Reserve (as reduced by
the estimated cost of distributing it to shareholders). If and to the extent
that any trust, escrow account, or other similar entity continues after the
close of such one-year period in connection either with making provision for
payment of liabilities or taxes or with distributions to shareholders of
California Series, such entity shall either (i) qualify as a liquidating trust
under Section 7701 of the Code (and applicable Treasury Regulations thereunder)
or other entity which does not constitute a continuation of California Series
for federal income tax purposes, or (ii) be subject to a waiver under Section
368(a)(2)(G)(ii) of the complete distribution requirement of Section
368(a)(2)(G)(i) of the Code. California Series shall be dissolved as a
portfolio of Multi-State under Massachusetts law, promptly following the making
of all distributions pursuant to paragraph 1.5 (and, in any event, within one
year after the Closing Date).

     1.10 Copies of all books and records maintained on behalf of California
Series in connection with its obligations under the Investment Company Act of
1940, as amended (the "1940 Act"), the Code, state blue sky laws or otherwise
in connection with this Agreement will promptly after the Closing be delivered
to officers of California Tax-Free or their designee and California Tax-Free or
its designee shall comply with applicable record retention requirements to
which California Series is subject under the 1940 Act.

2. VALUATION

     2.1 The value of the California Series Assets shall be the value of such
assets computed as of 4:00 p.m. on the New York Stock Exchange on the third
business day following the receipt of the requisite approval by shareholders of
California Series of this Agreement or at such time on such earlier or later
date after such approval as may be mutually agreed upon in writing (such time
and date being hereinafter called the "Valuation Date"), using the valuation
procedures set forth in California Tax-Free's then current Prospectus and
Statement of Additional Information.

     2.2 The net asset value of a California Tax-Free Share shall be the net
asset value per share computed on the Valuation Date, using the valuation
procedures set forth in California Tax-Free's then current Prospectus and
Statement of Additional Information.

     2.3 The number of California Tax-Free Shares (including fractional shares,
if any) to be issued hereunder shall be determined, with respect to each class,
by dividing the aggregate net asset value of each class of California Series
shares (determined in accordance with paragraph 2.1) by the net asset value per
share of the Class D shares of California Tax-Free (determined in accordance
with paragraph 2.2). For purposes of this paragraph, the aggregate net asset
value of the shares of California Series shall not include the amount of the
Cash Reserve.

     2.4 All computations of value shall be made by Morgan Stanley Dean Witter
Services Company Inc. ("MSDW Services") in accordance with its regular practice
in pricing California Tax-Free. California Tax-Free shall cause MSDW Services
to deliver a copy of its valuation report at the Closing.

3. CLOSING AND CLOSING DATE

     3.1 The Closing shall take place on the next business day following the
Valuation Date (the "Closing Date"). The Closing shall be held as of 9:00 a.m.
Eastern time, or at such other time as the parties may agree. The Closing shall
be held in a location mutually agreeable to the parties hereto. All acts taking
place at the Closing shall be deemed to take place simultaneously as of 9:00
a.m. Eastern time on the Closing Date unless otherwise provided.

     3.2 Portfolio securities held by California Series and represented by a
certificate or other written instrument shall be presented by it or on its
behalf to The Bank of New York (the "Custodian"), as custodian


                                      A-3
<PAGE>

for California Tax-Free, for examination no later than five business days
preceding the Valuation Date. Such portfolio securities (together with any cash
or other assets) shall be delivered by California Series to the Custodian for
the account of California Tax-Free on or before the Closing Date in conformity
with applicable custody provisions under the 1940 Act and duly endorsed in
proper form for transfer in such condition as to constitute good delivery
thereof in accordance with the custom of brokers. The portfolio securities
shall be accompanied by all necessary Federal and state stock transfer stamps
or a check for the appropriate purchase price of such stamps. Portfolio
securities and instruments deposited with a securities depository (as defined
in Rule 17f-4 under the 1940 Act) shall be delivered on or before the Closing
Date by book-entry in accordance with customary practices of such depository
and the Custodian. The cash delivered shall be in the form of a Federal Funds
wire, payable to the order of "The Bank of New York, Custodian for Morgan
Stanley Dean Witter California Tax-Free Income Fund."

     3.3 In the event that on the Valuation Date, (a) the New York Stock
Exchange shall be closed to trading or trading thereon shall be restricted or
(b) trading or the reporting of trading on such Exchange or elsewhere shall be
disrupted so that, in the judgment of both California Tax-Free and California
Series, accurate appraisal of the value of the net assets of California
Tax-Free or the California Series Assets is impracticable, the Valuation Date
shall be postponed until the first business day after the day when trading
shall have been fully resumed without restriction or disruption and reporting
shall have been restored.

     3.4 If requested, Multi-State shall deliver to California Tax-Free or its
designee (a) at the Closing, a list, certified by its Secretary, of the names,
addresses and taxpayer identification numbers of the California Series
Shareholders and the number and percentage ownership of outstanding California
Series shares owned by each such California Series Shareholder, all as of the
Valuation Date, and (b) as soon as practicable after the Closing, all original
documentation (including Internal Revenue Service forms, certificates,
certifications and correspondence) relating to the California Series
Shareholders' taxpayer identification numbers and their liability for or
exemption from back-up withholding. California Tax-Free shall issue and deliver
to such Secretary a confirmation evidencing delivery of California Tax-Free
Shares to be credited on the Closing Date to California Series or provide
evidence satisfactory to California Series that such California Tax-Free Shares
have been credited to California Series' account on the books of California
Tax-Free. At the Closing, each party shall deliver to the other such bills of
sale, checks, assignments, share certificates, if any, receipts or other
documents as such other party or its counsel may reasonably request.

4. COVENANTS OF CALIFORNIA TAX-FREE AND CALIFORNIA SERIES

     4.1 Except as otherwise expressly provided herein with respect to
California Series, California Tax-Free and California Series each will operate
its business in the ordinary course between the date hereof and the Closing
Date, it being understood that such ordinary course of business will include
customary dividends and other distributions.

     4.2 California Tax-Free will prepare and file with the Securities and
Exchange Commission ("Commission") a registration statement on Form N-14 under
the Securities Act of 1933, as amended ("1933 Act"), relating to California
Tax-Free Shares ("Registration Statement"). Multi-State will provide California
Tax-Free with the Proxy Materials as described in paragraph 4.3 below, for
inclusion in the Registration Statement. Multi-State will further provide
California Tax-Free with such other information and documents relating to
California Series as are reasonably necessary for the preparation of the
Registration Statement.

     4.3 Multi-State will call a meeting of the California Series shareholders
to consider and act upon this Agreement and to take all other action necessary
to obtain approval of the transactions contemplated herein. Multi-State will
prepare the notice of meeting, form of proxy and proxy statement (collectively,
"Proxy Materials") to be used in connection with such meeting; provided that
California Tax-Free will furnish


                                      A-4
<PAGE>

Multi-State with its currently effective prospectus for inclusion in the Proxy
Materials and with such other information relating to California Tax-Free as is
reasonably necessary for the preparation of the Proxy Materials.

     4.4 Multi-State will assist California Tax-Free in obtaining such
information as California Tax-Free reasonably requests concerning the
beneficial ownership of California Series shares.

     4.5 Subject to the provisions of this Agreement, California Tax-Free and
Multi-State will each take, or cause to be taken, all action, and do or cause
to be done, all things reasonably necessary, proper or advisable to consummate
and make effective the transactions contemplated by this Agreement.

     4.6 Multi-State shall furnish or cause to be furnished to California
Tax-Free within 30 days after the Closing Date a statement of California
Series' assets and liabilities as of the Closing Date, which statement shall be
certified by Multi-State's Treasurer and shall be in accordance with generally
accepted accounting principles consistently applied. As promptly as
practicable, but in any case within 60 days after the Closing Date, California
Series shall furnish California Tax-Free, in such form as is reasonably
satisfactory to California Tax-Free, a statement certified by Multi-State's
Treasurer of earnings and profits of California Series for Federal income tax
purposes that will be carried over to California Tax-Free pursuant to Section
381 of the Code.

     4.7 As soon after the Closing Date as is reasonably practicable,
Multi-State (a) shall prepare and file all Federal and other tax returns and
reports of California Series required by law to be filed with respect to all
periods ending on or before the Closing Date but not theretofore filed and (b)
shall pay all Federal and other taxes shown as due thereon and/or all Federal
and other taxes that were unpaid as of the Closing Date, including without
limitation, all taxes for which the provision for payment was made as of the
Closing Date (as represented in paragraph 5.2(k)).

     4.8 California Tax-Free agrees to use all reasonable efforts to obtain the
approvals and authorizations required by the 1933 Act and the 1940 Act and to
make such filings required by the state Blue Sky and securities laws as it may
deem appropriate in order to continue its operations after the Closing Date.

5. REPRESENTATIONS AND WARRANTIES

     5.1 California Tax-Free represents and warrants to Multi-State, on behalf
of California Series, as follows:

     (a) California Tax-Free is a validly existing Massachusetts business
   trust with full power to carry on its business as presently conducted;

     (b) California Tax-Free is a duly registered, open-end, management
   investment company, and its registration with the Commission as an
   investment company under the 1940 Act and the registration of its shares
   under the 1933 Act are in full force and effect;

     (c) All of the issued and outstanding shares of California Tax-Free have
   been offered and sold in compliance in all material respects with
   applicable registration requirements of the 1933 Act and state securities
   laws. Shares of California Tax-Free are registered in all jurisdictions in
   which they are required to be registered under state securities laws and
   other laws, and said registrations, including any periodic reports or
   supplemental filings, are complete and current, all fees required to be
   paid have been paid, and California Tax-Free is not subject to any stop
   order and is fully qualified to sell its shares in each state in which its
   shares have been registered;

     (d) The current Prospectus and Statement of Additional Information of
   California Tax-Free conform in all material respects to the applicable
   requirements of the 1933 Act and the 1940 Act and the


                                      A-5
<PAGE>

   regulations thereunder and do not include any untrue statement of a
   material fact or omit to state any material fact required to be stated
   therein or necessary to make the statements therein, in light of the
   circumstances under which they were made, not misleading;

     (e) California Tax-Free is not in, and the execution, delivery and
   performance of this Agreement will not result in a, material violation of
   any provision of California Tax-Free's Declaration of Trust or By-Laws or
   of any agreement, indenture, instrument, contract, lease or other
   undertaking to which California Tax-Free is a party or by which it is
   bound;

     (f) No litigation or administrative proceeding or investigation of or
   before any court or governmental body is presently pending or, to its
   knowledge, threatened against California Tax-Free or any of its properties
   or assets which, if adversely determined, would materially and adversely
   affect its financial condition or the conduct of its business; and
   California Tax-Free knows of no facts that might form the basis for the
   institution of such proceedings and is not a party to or subject to the
   provisions of any order, decree or judgment of any court or governmental
   body which materially and adversely affects, or is reasonably likely to
   materially and adversely effect, its business or its ability to consummate
   the transactions herein contemplated;

     (g) The Statement of Assets and Liabilities, Statement of Operations,
   Statement of Changes in Net Assets and Financial Highlights for the year
   ended December 31, 1999, of California Tax-Free audited by
   PricewaterhouseCoopers LLP (copies of which have been furnished to
   California Series), fairly present, in all material respects, California
   Tax-Free's financial condition as of such date in accordance with generally
   accepted accounting principles, and its results of such operations, changes
   in its net assets and financial highlights for such period, and as of such
   date there were no known liabilities of California Tax-Free (contingent or
   otherwise) not disclosed therein that would be required in accordance with
   generally accepted accounting principles to be disclosed therein;

     (h) All issued and outstanding California Tax-Free Shares are, and at the
   Closing Date will be, duly and validly issued and outstanding, fully paid
   and nonassessable with no personal liability attaching to the ownership
   thereof, except as set forth under the caption "Additional Information" in
   California Tax-Free's current Prospectus incorporated by reference in the
   Registration Statement. California Tax-Free does not have outstanding any
   options, warrants or other rights to subscribe for or purchase any of its
   shares;

     (i) The execution, delivery and performance of this Agreement have been
   duly authorized by all necessary action on the part of California Tax-Free,
   and this Agreement constitutes a valid and binding obligation of California
   Tax-Free enforceable in accordance with its terms, subject as to
   enforcement, to bankruptcy, insolvency, reorganization, moratorium and
   other laws relating to or affecting creditors rights and to general equity
   principles. No other consents, authorizations or approvals are necessary in
   connection with California Tax-Free's performance of this Agreement;

     (j) California Tax-Free Shares to be issued and delivered to California
   Series, for the account of the California Series Shareholders, pursuant to
   the terms of this Agreement will at the Closing Date have been duly
   authorized and, when so issued and delivered, will be duly and validly
   issued California Tax-Free Shares, and will be fully paid and
   non-assessable with no personal liability attaching to the ownership
   thereof, except as set forth under the caption "Capital Stock and Other
   Securities" in California Tax-Free's current Statement of Additional
   Information incorporated by reference in the Statement of Additional
   Information to this Registration Statement;

     (k) All material Federal and other tax returns and reports of California
   Tax-Free required by law to be filed on or before the Closing Date have
   been filed and are correct, and all Federal and other taxes


                                      A-6
<PAGE>

   shown as due or required to be shown as due on said returns and reports
   have been paid or provision has been made for the payment thereof, and to
   the best of California Tax-Free's knowledge, no such return is currently
   under audit and no assessment has been asserted with respect to any such
   return;

     (l) For each taxable year since its inception, California Tax-Free has
   met the requirements of Subchapter M of the Code for qualification and
   treatment as a "regulated investment company" and neither the execution or
   delivery of nor the performance of its obligations under this Agreement
   will adversely affect, and no other events are reasonably likely to occur
   which will adversely affect the ability of California Tax-Free to continue
   to meet the requirements of Subchapter M of the Code;

     (m) Since December 31, 1999 there has been no change by California
   Tax-Free in accounting methods, principles, or practices, including those
   required by generally accepted accounting principles;

     (n) The information furnished or to be furnished by California Tax-Free
   for use in registration statements, proxy materials and other documents
   which may be necessary in connection with the transactions contemplated
   hereby shall be accurate and complete in all material respects and shall
   comply in all material respects with Federal securities and other laws and
   regulations applicable thereto; and

     (o) The Proxy Materials to be included in the Registration Statement
   (only insofar as they relate to California Tax-Free) will, on the effective
   date of the Registration Statement and on the Closing Date, not contain any
   untrue statement of a material fact or omit to state a material fact
   required to be stated therein or necessary to make the statements therein,
   in light of the circumstances under which such statements were made, not
   materially misleading.

     5.2 Multi-State, on behalf of California Series, represents and warrants
to California Tax-Free as follows:

     (a) Multi-State is a series of a validly existing Massachusetts business
   trust with full power to carry on its business as presently conducted;

     (b) Multi-State is a duly registered, open-end, management investment
   company, and its registration with the Commission as an investment company
   under the 1940 Act and the registration of its shares under the 1933 Act
   are in full force and effect;

     (c) All of the issued and outstanding shares of beneficial interest of
   California Series have been offered and sold in compliance in all material
   respects with applicable requirements of the 1933 Act and state securities
   laws. Shares of California Series are registered in all jurisdictions in
   which they are required to be registered and said registrations, including
   any periodic reports or supplemental filings, are complete and current, all
   fees required to be paid have been paid, and Multi-State is not subject to
   any stop order and is fully qualified to sell its shares in each state in
   which its shares have been registered;

     (d) The current Prospectus and Statement of Additional Information of
   Multi-State conform in all material respects to the applicable requirements
   of the 1933 Act and the 1940 Act and the regulations thereunder and do not
   include any untrue statement of a material fact or omit to state any
   material fact required to be stated therein or necessary to make the
   statements therein, in light of the circumstances under which they were
   made, not misleading;

     (e) Multi-State is not, and the execution, delivery and performance of
   this Agreement will not result, in a material violation of any provision of
   Multi-State's Declaration of Trust or By-Laws or of any agreement,
   indenture, instrument, contract, lease or other undertaking to which
   Multi-State is a party or by which it is bound;

     (f) No litigation or administrative proceeding or investigation of or
   before any court or governmental body is presently pending or, to its
   knowledge, threatened against California Series or any of its


                                      A-7
<PAGE>

   properties or assets which, if adversely determined, would materially and
   adversely affect its financial condition or the conduct of its business;
   and Multi-State knows of no facts that might form the basis for the
   institution of such proceedings and is not a party to or subject to the
   provisions of any order, decree or judgment of any court or governmental
   body which materially and adversely affects, or is reasonably likely to
   materially and adversely effect, its business or its ability to consummate
   the transactions herein contemplated;

     (g) The Statement of Assets and Liabilities, Statement of Operations,
   Statement of Changes in Net Assets and Financial Highlights of Multi-State
   for the year ended November 30, 1999, audited by PricewaterhouseCoopers LLP
   (copies of which have been or will be furnished to California Tax-Free)
   fairly present, in all material respects, California Series' financial
   condition as of such date, and its results of operations, changes in its
   net assets and financial highlights for such period in accordance with
   generally accepted accounting principles, and as of such date there were no
   known liabilities of California Series (contingent or otherwise) not
   disclosed therein that would be required in accordance with generally
   accepted accounting principles to be disclosed therein;

     (h) Multi-State has no material contracts or other commitments (other
   than this Agreement) that will be terminated with liability to it prior to
   the Closing Date;

     (i) All issued and outstanding shares of California Series are, and at
   the Closing Date will be, duly and validly issued and outstanding, fully
   paid and nonassessable with no personal liability attaching to the
   ownership thereof, except as set forth under the caption "Capital Stock and
   Other Securities" in Multi-State's current Statement of Additional
   Information incorporated by reference in the Statement of Additional
   Information to this Registration Statement. California Series does not have
   outstanding any options, warrants or other rights to subscribe for or
   purchase any of its shares, nor is there outstanding any security
   convertible to any of its shares. All such shares will, at the time of
   Closing, be held by the persons and in the amounts set forth in the list of
   shareholders submitted to California Tax-Free pursuant to paragraph 3.4;

     (j) The execution, delivery and performance of this Agreement will have
   been duly authorized prior to the Closing Date by all necessary action on
   the part of Multi-State, and subject to the approval of California Series'
   shareholders, this Agreement constitutes a valid and binding obligation of
   Multi-State, enforceable in accordance with its terms, subject as to
   enforcement to bankruptcy, insolvency, reorganization, moratorium and other
   laws relating to or affecting creditors rights and to general equity
   principles. No other consents, authorizations or approvals are necessary in
   connection with Multi-State's performance of this Agreement;

     (k) All material Federal and other tax returns and reports of California
   Series required by law to be filed on or before the Closing Date shall have
   been filed and are correct and all Federal and other taxes shown as due or
   required to be shown as due on said returns and reports have been paid or
   provision has been made for the payment thereof, and to the best of
   California Series' knowledge, no such return is currently under audit and
   no assessment has been asserted with respect to any such return;

     (l) For each taxable year since its inception, California Series, has met
   all the requirements of Subchapter M of the Code for qualification and
   treatment as a "regulated investment company" and neither the execution or
   delivery of nor the performance of its obligations under this Agreement
   will adversely affect, and no other events are reasonably likely to occur
   which will adversely affect, the ability of California Series to continue
   to meet the requirements of Subchapter M of the Code;

     (m) At the Closing Date, Multi-State will have good and valid title to
   the California Series Assets, subject to no liens (other than the
   obligation, if any, to pay the purchase price of portfolio securities


                                      A-8
<PAGE>

   purchased by California Series which have not settled prior to the Closing
   Date), security interests or other encumbrances, and full right, power and
   authority to assign, deliver and otherwise transfer such assets hereunder,
   and upon delivery and payment for such assets, California Tax-Free will
   acquire good and marketable title thereto, subject to no restrictions on
   the full transfer thereof, including any restrictions as might arise under
   the 1933 Act;

     (n) On the effective date of the Registration Statement, at the time of
   the meeting of California Series' shareholders and on the Closing Date, the
   Proxy Materials (exclusive of the currently effective California Tax-Free
   Prospectus contained therein) will (i) comply in all material respects with
   the provisions of the 1933 Act, the Securities Exchange Act of 1934, as
   amended ("1934 Act") and the 1940 Act and the regulations thereunder and
   (ii) not contain any untrue statement of a material fact or omit to state a
   material fact required to be stated therein or necessary to make the
   statements therein not misleading. Any other information furnished by
   Multi-State for use in the Registration Statement or in any other manner
   that may be necessary in connection with the transactions contemplated
   hereby shall be accurate and complete and shall comply in all material
   respects with applicable Federal securities and other laws and regulations
   thereunder;

     (o) California Series will, on or prior to the Valuation Date, declare
   one or more dividends or other distributions to shareholders that, together
   with all previous dividends and other distributions to shareholders, shall
   have the effect of distributing to the shareholders all of its investment
   company taxable income and net capital gain, if any, through the Valuation
   Date (computed without regard to any deduction for dividends paid);

     (p) Multi-State has maintained or has caused to be maintained on its behalf
   all books and accounts as required of a registered investment company in
   compliance with the requirements of Section 31 of the 1940 Act and the Rules
   thereunder; and

     (q) California Series is not acquiring California Tax-Free Shares to be
   issued hereunder for the purpose of making any distribution thereof other
   than in accordance with the terms of this Agreement.

6. CONDITIONS PRECEDENT TO OBLIGATIONS OF CALIFORNIA SERIES

     The obligations of Multi-State to consummate the transactions provided for
herein shall be subject, at its election, to the performance by California
Tax-Free of all the obligations to be performed by it hereunder on or before
the Closing Date and, in addition thereto, the following conditions:

     6.1 All representations and warranties of California Tax-Free contained in
this Agreement shall be true and correct in all material respects as of the
date hereof and, except as they may be affected by the transactions
contemplated by this Agreement, as of the Closing Date with the same force and
effect as if made on and as of the Closing Date;

     6.2 California Tax-Free shall have delivered to California Series, a
certificate of its President and Treasurer, in a form reasonably satisfactory
to Multi-State and dated as of the Closing Date, to the effect that the
representations and warranties of California Tax-Free made in this Agreement
are true and correct at and as of the Closing Date, except as they may be
affected by the transactions contemplated by this Agreement, and as to such
other matters as Multi-State shall reasonably request;

     6.3 Multi-State, on behalf of California Series, shall have received a
favorable opinion from Mayer, Brown & Platt, counsel to California Tax-Free,
dated as of the Closing Date, to the effect that:

     (a) California Tax-Free is a validly existing Massachusetts business
   trust, and has the power to own all of its properties and assets and to
   carry on its business as presently conducted (Massachusetts counsel


                                      A-9
<PAGE>

   may be relied upon in delivering such opinion); (b) California Tax-Free is
   a duly registered, open-end, management investment company, and its
   registration with the Commission as an investment company under the 1940
   Act is in full force and effect; (c) this Agreement has been duly
   authorized, executed and delivered by California Tax-Free and, assuming
   that the Registration Statement complies with the 1933 Act, the 1934 Act
   and the 1940 Act and regulations thereunder and assuming due authorization,
   execution and delivery of this Agreement by California Series, is a valid
   and binding obligation of California Tax-Free enforceable against
   California Tax-Free in accordance with its terms, subject as to
   enforcement, to bankruptcy, insolvency, reorganization, moratorium and
   other laws relating to or affecting creditors rights and to general equity
   principles; (d) California Tax-Free Shares to be issued to California
   Series Shareholders as provided by this Agreement are duly authorized and
   upon such delivery will be validly issued, fully paid and non-assessable
   (except as set forth under the caption "Capital Stock and Other Securities"
   in California Tax-Free's Statement of Additional Information), and no
   shareholder of California Tax-Free has any preemptive rights to
   subscription or purchase in respect thereof (Massachusetts counsel may be
   relied upon in delivering such opinion); (e) the execution and delivery of
   this Agreement did not, and the consummation of the transactions
   contemplated hereby will not, violate California Tax-Free's Declaration of
   Trust or By-Laws (Massachusetts counsel may be relied upon in delivering
   such opinion); and (f) to the knowledge of such counsel, no consent,
   approval, authorization or order of any court or governmental authority of
   the United States or any state is required for the consummation by
   California Tax-Free of the transactions contemplated herein, except such as
   have been obtained under the 1933 Act, the 1934 Act and the 1940 Act and
   such as may be required under state securities laws; and

     6.4 As of the Closing Date, there shall have been no material change in
the investment objective, policies and restrictions nor any increase in the
investment management fees from those described in California Tax-Free's
Prospectus dated February 22, 2000 and Statement of Additional Information
dated February 22, 2000.


7. CONDITIONS PRECEDENT TO OBLIGATIONS OF CALIFORNIA TAX-FREE

     The obligations of California Tax-Free to complete the transactions
provided for herein shall be subject, at its election, to the performance by
Multi-State, on behalf of California Series, of all the obligations to be
performed by it hereunder on or before the Closing Date and, in addition
thereto, the following conditions:

     7.1 All representations and warranties of Multi-State contained in this
Agreement shall be true and correct in all material respects as of the date
hereof and, except as they may be affected by the transactions contemplated by
this Agreement, as of the Closing Date with the same force and effect as if
made on and as of the Closing Date;

     7.2 Multi-State shall have delivered to California Tax-Free at the Closing
a certificate of its President and its Treasurer, in form and substance
satisfactory to California Tax-Free and dated as of the Closing Date, to the
effect that the representations and warranties of Multi-State made in this
Agreement are true and correct at and as of the Closing Date, except as they
may be affected by the transactions contemplated by this Agreement, and as to
such other matters as California Tax-Free shall reasonably request;

     7.3 Multi-State shall have delivered to California Tax-Free a statement of
the California Series Assets and its liabilities, together with a list of
California Series' portfolio securities and other assets showing the respective
adjusted bases and holding periods thereof for income tax purposes, as of the
Closing Date, certified by the Treasurer of Multi-State;


                                      A-10
<PAGE>

     7.4 Multi-State shall have delivered to California Tax-Free within three
business days after the Closing a letter from PricewaterhouseCoopers LLP dated
as of the Closing Date stating that (a) such firm has performed a limited
review of the Federal and state income tax returns of Multi-State for each of
the last three taxable years and, based on such limited review, nothing came to
their attention that caused them to believe that such returns did not properly
reflect, in all material respects, the Federal and state income tax liabilities
of California Series for the periods covered thereby, (b) for the period from
November 30, 1999 to and including the Closing Date, such firm has performed a
limited review (based on unaudited financial data) to ascertain the amount of
applicable Federal, state and local taxes and has determined that same either
have been paid or reserves have been established for payment of such taxes,
and, based on such limited review, nothing came to their attention that caused
them to believe that the taxes paid or reserves set aside for payment of such
taxes were not adequate in all material respects for the satisfaction of all
Federal, state and local tax liabilities for the period from November 30, 1999
to and including the Closing Date and (c) based on such limited reviews,
nothing came to their attention that caused them to believe that California
Series would not qualify as a regulated investment company for Federal income
tax purposes for any such year or period;

     7.5 California Tax-Free shall have received at the Closing a favorable
opinion from Mayer, Brown & Platt, counsel to Multi-State, dated as of the
Closing Date to the effect that:

     (a) Multi-State is a validly existing Massachusetts business trust and
   has the power to own all of its properties and assets and to carry on its
   business as presently conducted (Massachusetts counsel may be relied upon
   in delivering such opinion); (b) Multi-State is a duly registered,
   open-end, management investment company under the 1940 Act, and its
   registration with the Commission as an investment company under the 1940
   Act is in full force and effect; (c) this Agreement has been duly
   authorized, executed and delivered by Multi-State and, assuming that the
   Registration Statement complies with the 1933 Act, the 1934 Act and the
   1940 Act and the regulations thereunder and assuming due authorization,
   execution and delivery of this Agreement by California Tax-Free, is a valid
   and binding obligation of Multi-State enforceable against Multi-State in
   accordance with its terms, subject as to enforcement, to bankruptcy,
   insolvency, reorganization, moratorium and other laws relating to or
   affecting creditors rights and to general equity principles; (d) the
   execution and delivery of this Agreement did not, and the consummation of
   the transactions contemplated hereby will not, violate Multi-State's
   Declaration of Trust or By-Laws (Massachusetts counsel may be relied upon
   in delivering such opinion); and (e) to the knowledge of such counsel, no
   consent, approval, authorization or order of any court or governmental
   authority of the United States or any state is required for the
   consummation by Multi-State of the transactions contemplated herein, except
   such as have been obtained under the 1933 Act, the 1934 Act and the 1940
   Act and such as may be required under state securities laws; and

     7.6 On the Closing Date, the California Series Assets shall include no
assets that California Tax-Free, by reason of limitations of the fund's
Declaration of Trust or otherwise, may not properly acquire.

8. FURTHER CONDITIONS PRECEDENT TO OBLIGATIONS OF CALIFORNIA TAX-FREE
   AND CALIFORNIA SERIES

     The obligations of Multi-State, on behalf of California Series, and
California Tax-Free hereunder are each subject to the further conditions that
on or before the Closing Date:

     8.1 This Agreement and the transactions contemplated herein shall have
been approved by the requisite vote of the holders of the outstanding shares of
California Series in accordance with the provisions of Multi-State's
Declaration of Trust, and certified copies of the resolutions evidencing such
approval shall have been delivered to California Tax-Free;


                                      A-11
<PAGE>

     8.2 On the Closing Date, no action, suit or other proceeding shall be
pending before any court or governmental agency in which it is sought to
restrain or prohibit, or obtain damages or other relief in connection with,
this Agreement or the transactions contemplated herein;

     8.3 All consents of other parties and all other consents, orders and
permits of Federal, state and local regulatory authorities (including those of
the Commission and of state Blue Sky and securities authorities, including
"no-action" positions of and exemptive orders from such Federal and state
authorities) deemed necessary by California Tax-Free or Multi-State to permit
consummation, in all material respects, of the transactions contemplated herein
shall have been obtained, except where failure to obtain any such consent,
order or permit would not involve risk of a material adverse effect on the
assets or properties of California Tax-Free or California Series;

     8.4 The Registration Statement shall have become effective under the 1933
Act, no stop orders suspending the effectiveness thereof shall have been issued
and, to the best knowledge of the parties hereto, no investigation or
proceeding for that purpose shall have been instituted or be pending,
threatened or contemplated under the 1933 Act;

     8.5 California Series shall have declared and paid a dividend or dividends
and/or other distribution or distributions that, together with all previous
such dividends or distributions, shall have the effect of distributing to the
California Series Shareholders all of California Series' investment company
taxable income (computed without regard to any deduction for dividends paid)
and all of its net capital gain (after reduction for any capital loss
carry-forward and computed without regard to any deduction for dividends paid)
for all taxable years ending on or before the Closing Date; and

     8.6 The parties shall have received the opinion of the law firm of Mayer,
Brown & Platt (based on such representations as such law firm shall reasonably
request), addressed to California Tax-Free and Multi-State, on behalf of
California Series, which opinion may be relied upon by the shareholders of
California Series, substantially to the effect that, for Federal income tax
purposes:

     (a) The transfer of California Series' assets in exchange for California
   Tax-Free Shares and the assumption by California Tax-Free of certain stated
   liabilities of California Series followed by the distribution by California
   Series of California Tax-Free Shares to the California Series Shareholders
   in exchange for their California Series shares pursuant to and in
   accordance with the terms of the Reorganization Agreement will constitute a
   "reorganization" within the meaning of Section 368(a)(1)(C) of the Code,
   and California Series and California Tax-Free will each be a "party to a
   reorganization" within the meaning of Section 368(b) of the Code;

     (b) No gain or loss will be recognized by California Tax-Free upon the
   receipt of the assets of California Series solely in exchange for
   California Tax-Free Shares and the assumption by California Tax-Free of the
   stated liabilities of California Series;

     (c) No gain or loss will be recognized by California Series upon the
   transfer of the assets of California Series to California Tax-Free in
   exchange for California Tax-Free Shares and the assumption by California
   Tax-Free of the stated liabilities or upon the distribution of California
   Tax-Free Shares to the California Series Shareholders in exchange for their
   California Series shares;

     (d) No gain or loss will be recognized by the California Series
   Shareholders upon the exchange of the California Series shares for
   California Tax-Free Shares;

     (e) The aggregate tax basis for California Tax-Free Shares received by
   each California Series Shareholder pursuant to the reorganization will be
   the same as the aggregate tax basis of the California Series Shares held by
   each such California Series Shareholder immediately prior to the
   Reorganization;


                                      A-12
<PAGE>

     (f) The holding period of California Tax-Free Shares to be received by
   each California Series Shareholder will include the period during which the
   California Series Shares surrendered in exchange therefor were held
   (provided such California Series Shares were held as capital assets on the
   date of the Reorganization);

     (g) The tax basis of the assets of California Series acquired by
   California Tax-Free will be the same as the tax basis of such assets to
   California Series immediately prior to the Reorganization; and

     (h) The holding period of the assets of California Series in the hands of
   California Tax-Free will include the period during which those assets were
   held by California Series.

     Notwithstanding anything herein to the contrary, neither California
Tax-Free nor California Series may waive the conditions set forth in this
paragraph 8.6.


9. FEES AND EXPENSES

     9.1 (a) California Tax-Free shall bear its expenses incurred in connection
with the entering into, and carrying out of, the provisions of this Agreement,
including legal, accounting, Commission registration fees and Blue Sky
expenses. California Series shall bear its expenses incurred in connection with
the entering into and carrying out of the provisions of this Agreement,
including legal and accounting fees, printing, filing and proxy solicitation
expenses and portfolio transfer taxes (if any) incurred in connection with the
consummation of the transactions contemplated herein.

     (b) In the event the transactions contemplated herein are not consummated
by reason of California Series being either unwilling or unable to go forward
(other than by reason of the nonfulfillment or failure of any condition to
California Series' obligations specified in this Agreement), California Series'
only obligation hereunder shall be to reimburse California Tax-Free for all
reasonable out-of-pocket fees and expenses incurred by California Tax-Free in
connection with those transactions.

     (c) In the event the transactions contemplated herein are not consummated
by reason of California Tax-Free being either unwilling or unable to go forward
(other than by reason of the nonfulfillment or failure of any condition to
California Tax-Free's obligations specified in this Agreement), California
Tax-Free's only obligation hereunder shall be to reimburse California Series
for all reasonable out-of-pocket fees and expenses incurred by California
Series in connection with those transactions.

10. ENTIRE AGREEMENT; SURVIVAL OF WARRANTIES

     10.1 This Agreement constitutes the entire agreement between the parties.

     10.2 The representations, warranties and covenants contained in this
Agreement or in any document delivered pursuant hereto or in connection
herewith shall survive the consummation of the transactions contemplated
herein, except that the representations, warranties and covenants of
Multi-State hereunder shall not survive the dissolution and complete
liquidation of California Series in accordance with Section 1.9.

11. TERMINATION

     11.1 This Agreement may be terminated and the transactions contemplated
hereby may be abandoned at any time prior to the Closing:

     (a) by the mutual written consent of Multi-State, on behalf of California
   Series, and California Tax-Free;


                                      A-13
<PAGE>

     (b) by either California Tax-Free or Multi-State, on behalf of California
   Series, by notice to the other, without liability to the terminating party
   on account of such termination (providing the terminating party is not
   otherwise in material default or breach of this Agreement) if the Closing
   shall not have occurred on or before September 30, 2000; or

     (c) by either California Tax-Free or Multi-State, on behalf of California
   Series, in writing without liability to the terminating party on account of
   such termination (provided the terminating party is not otherwise in
   material default or breach of this Agreement), if (i) the other party shall
   fail to perform in any material respect its agreements contained herein
   required to be performed on or prior to the Closing Date, (ii) the other
   party materially breaches any of its representations, warranties or
   covenants contained herein, (iii) the California Series shareholders fail
   to approve this Agreement at any meeting called for such purpose at which a
   quorum was present or (iv) any other condition herein expressed to be
   precedent to the obligations of the terminating party has not been met and
   it reasonably appears that it will not or cannot be met.

     11.2 (a) Termination of this Agreement pursuant to paragraphs 11.1 (a) or
(b) shall terminate all obligations of the parties hereunder and there shall be
no liability for damages on the part of California Tax-Free or Multi-State, or
the trustees or officers of California Tax-Free or Multi-State, to any other
party or its trustees or officers.

     (b) Termination of this Agreement pursuant to paragraph 11.1 (c) shall
   terminate all obligations of the parties hereunder and there shall be no
   liability for damages on the part of California Tax-Free or Multi-State, or
   the trustees or officers of California Tax-Free or Multi-State, except that
   any party in breach of this Agreement shall, upon demand, reimburse the
   non-breaching party for all reasonable out-of-pocket fees and expenses
   incurred in connection with the transactions contemplated by this
   Agreement, including legal, accounting and filing fees.

12. AMENDMENTS

     This Agreement may be amended, modified or supplemented in such manner as
may be mutually agreed upon in writing by the parties.

13. MISCELLANEOUS

     13.1 The article and paragraph headings contained in this Agreement are
for reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement.

     13.2 This Agreement may be executed in any number of counterparts, each of
which shall be deemed an original.

     13.3 This Agreement shall be governed by and construed in accordance with
the laws of the Commonwealth of Massachusetts.

     13.4 This Agreement shall bind and inure to the benefit of the parties
hereto and their respective successors and assigns, but no assignment or
transfer hereof or of any rights or obligations hereunder shall be made by any
party without the written consent of the other party. Nothing herein expressed
or implied is intended or shall be construed to confer upon or give any person,
firm or corporation, other than the parties hereto and their respective
successors and assigns, any rights or remedies under or by reason of this
Agreement.

     13.5 The obligations and liabilities of California Tax-Free hereunder are
solely those of California Tax-Free. It is expressly agreed that no
shareholder, nominee, trustee, officer, agent, or employee of California


                                      A-14
<PAGE>

Tax-Free shall be personally liable hereunder. The execution and delivery of
this Agreement have been authorized by the trustees of California Tax-Free and
signed by authorized officers of California Tax-Free acting as such, and
neither such authorization by such trustees nor such execution and delivery by
such officers shall be deemed to have been made by any of them individually or
to impose any liability on any of them personally.

     13.6 The obligations and liabilities of Multi-State hereunder are solely
those of Multi-State. It is expressly agreed that no shareholder, nominee,
trustee, officer, agent, or employee of California Series shall be personally
liable hereunder. The execution and delivery of this Agreement have been
authorized by the trustees of Multi-State and signed by authorized officers of
Multi-State acting as such, and neither such authorization by such trustees nor
such execution and delivery by such officers shall be deemed to have been made
by any of them individually or to impose any liability on any of them
personally.

     IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement
to be executed by a duly authorized officer.



            MORGAN STANLEY DEAN WITTER MULTI-STATE MUNICIPAL SERIES TRUST
                        ON BEHALF OF CALIFORNIA SERIES



                              By:  /s/ CHARLES A. FIUMEFREDDO
                                 ----------------------------------------------
                                 Name:  Charles A. Fiumefreddo
                                 Title: Chairman



            MORGAN STANLEY DEAN WITTER CALIFORNIA TAX-FREE INCOME FUND



                              By:  /s/ BARRY FINK
                                 ----------------------------------------------
                                 Name: Barry Fink
                                 Title:Vice President



                                      A-15
<PAGE>








                 (This page has been left blank intentionally.)


<PAGE>
                                                                       Exhibit B

                                                  PROSPECTUS - FEBRUARY 22, 2000

Morgan Stanley Dean Witter
                                                 CALIFORNIA TAX-FREE INCOME FUND

                                 [COVER PHOTO]

                     A MUTUAL FUND THAT SEEKS TO PROVIDE A HIGH LEVEL OF CURRENT
                           INCOME EXEMPT FROM BOTH FEDERAL AND CALIFORNIA INCOME
                                TAX, CONSISTENT WITH THE PRESERVATION OF CAPITAL

  The Securities and Exchange Commission has not approved or disapproved these
securities or passed upon the adequacy of this PROSPECTUS. Any representation to
                      the contrary is a criminal offense.

<PAGE>

CONTENTS


<TABLE>
<S>                                <C>                                           <C>
The Fund                           Investment Objective.........                   1
                                   Principal Investment
                                   Strategies...................                   1
                                   Principal Risks..............                   2
                                   Past Performance.............                   4
                                   Fees and Expenses............                   5
                                   Additional Investment
                                     Strategy Information.......                   6
                                   Additional Risk
                                     Information................                   6
                                   Fund Management..............                   7

Shareholder Information            Pricing Fund Shares..........                   8
                                   How to Buy Shares............                   8
                                   How to Exchange Shares.......                  10
                                   How to Sell Shares...........                  11
                                   Distributions................                  13
                                   Tax Consequences.............                  14
                                   Share Class Arrangements.....                  15

Financial Highlights               .............................                  22

Our Family of Funds                .............................   Inside Back Cover

                                   THIS PROSPECTUS CONTAINS IMPORTANT INFORMATION
                                   ABOUT THE FUND. PLEASE READ IT CAREFULLY AND
                                   KEEP IT FOR FUTURE REFERENCE.
</TABLE>

<PAGE>
[Sidebar]
INCOME
AN INVESTMENT OBJECTIVE HAVING THE PRIMARY GOAL OF SELECTING SECURITIES TO PAY
OUT INCOME.
[End Sidebar]

THE FUND

[ICON]  INVESTMENT OBJECTIVE
- --------------------------------------------------------------------------------
           Morgan Stanley Dean Witter California Tax-Free Income Fund seeks to
           provide a high level of current income exempt from federal and
           California income tax, consistent with the preservation of capital.

[ICON]  PRINCIPAL INVESTMENT STRATEGIES
- --------------------------------------------------------------------------------
           The Fund will normally invest at least 80% of its assets in
           securities that pay interest exempt from federal and California state
           income taxes. The Fund's "Investment Manager," Morgan Stanley Dean
           Witter Advisors Inc., generally invests the Fund's assets in
                            investment grade, California municipal obligations.
                            Municipal obligations are bonds, notes or short-term
                            commercial paper issued by state governments, local
                            governments and their respective agencies. These
                            municipal obligations will have the following
                            ratings at the time of purchase:

                           - municipal bonds --             within the four
                                                            highest grades by
                                                            Moody's Investors
                                                            Service Inc.
                                                            ("Moody's"),
                                                            Standard & Poor's
                                                            Corporation ("S&P"),
                                                            or Fitch IBCA, Inc.
                                                            ("Fitch");

                           - municipal notes --             within the two
                                                            highest grades or,
                                                            if not rated, have
                                                            outstanding bonds
                                                            within the four
                                                            highest grades by
                                                            Moody's, S&P or
                                                            Fitch; and

                           - municipal commercial paper -- within the highest
                                                           grade by Moody's, S&P
                                                           or Fitch.

           The Fund may also invest in unrated securities which are judged by
           the Investment Manager to have comparable quality to the securities
           described above.

           The Fund may invest up to 10% of its assets in inverse floating rate
           municipal obligations. The interest rates on these obligations
           generally move in the reverse direction of market interest rates. If
           market interest rates fall, the interest rate on the obligations will
           increase and if market interest rates increase, the interest rate on
           the obligations will fall.


           The Fund may invest up to 20% of its assets in taxable money market
           instruments, tax-exempt securities of other states and
           municipalities, and securities that pay interest income subject to
           the "alternative minimum tax." Since some investors may have to pay
           tax on a Fund distribution of this income, the Fund may not be a
           suitable investment for them. See the "Tax Consequences" section for
           more details.


                                                                               1
<PAGE>

           Municipal bonds, notes and commercial paper are commonly classified
           as either "general obligation" or "revenue." General obligation
           bonds, notes, and commercial paper are secured by the issuer's faith
           and credit, including its taxing power, for payment of principal and
           interest. Revenue bonds, notes and commercial paper, however, are
           generally payable from a specific source of income. They are issued
           to finance a wide variety of municipal projects which may include:
           educational facilities, electric utility, hospitals/healthcare,
           industrial development/pollution control, single & multi-family
           housing, transportation and water & sewer facilities. Included in the
           revenue bonds category are participations in lease obligations. The
           Fund's municipal obligation investments may include zero coupon
           securities, which are purchased at a discount and accrue interest,
           but make no interest payments until maturity.


           In pursuing the Fund's investment objective, the Investment Manager
           has considerable leeway in deciding which investments it buys, holds
           or sells on a day-to-day basis -- and which investment strategies it
           uses. For example, the Investment Manager in its discretion may
           determine to use some permitted investment strategies while not using
           others.

[ICON]  PRINCIPAL RISKS
- --------------------------------------------------------------------------------

           There is no assurance that the Fund will achieve its investment
           objective. The Fund's share price and yield will fluctuate with
           changes in the market value of the Fund's portfolio securities. When
           you sell Fund shares, they may be worth less than what you paid for
           them and, accordingly, you can lose money investing in this Fund.


           CREDIT AND INTEREST RATE RISKS. Principal risks of investing in the
           Fund are associated with its municipal investments, particularly its
           concentration in municipal obligations of a single state. Municipal
           obligations, like other debt securities, are subject to two types of
           risks: credit risk and interest rate risk.

           Credit risk refers to the possibility that the issuer of a security
           will be unable or unwilling to make interest payments and/or repay
           the principal on its debt. In the case of revenue bonds, notes or
           commercial paper, for example, the credit risk is the possibility
           that the user fees from a project or other specified revenue sources
           are insufficient to meet interest and/or principal payment
           obligations. Private activity bonds used to finance projects, such as
           industrial development and pollution control, may also be negatively
           impacted by the general credit of the user of the project. Unlike
           most fixed-income mutual funds, the Fund is subject to the added
           credit risk of concentrating its investments in a single state. The
           Fund could be affected by political, economic and regulatory
           developments concerning these issuers. Should any difficulties
           develop concerning these municipalities' abilities to pay principal
           and/or interest on their debt obligations, the Fund's value and yield
           could be adversely affected.

           Interest rate risk refers to fluctuations in the value of a
           fixed-income security resulting from changes in the general level of
           interest rates. When the general level of interest

 2
<PAGE>
           rates goes up, the prices of most fixed-income securities go down.
           When the general level of interest rates goes down, the prices of
           most fixed-income securities go up. Zero coupon securities are
           typically subject to greater price fluctuations than comparable
           securities that pay interest. As a general illustration of the
           relationship between fixed-income securities and interest rates, the
           following table shows how interest rates affect bond prices.

                           How Interest Rates Affect Bond Prices

<TABLE>
<CAPTION>
                                                                                     PRICE PER $1,000 OF A MUNICIPAL BOND
                                                                                              IF INTEREST RATES:
                                                                                     ------------------------------------
                                                                                       INCREASE*           DECREASE**
                                                                                     --------------    ------------------
                YEARS TO MATURITY        BOND MATURITY     COUPON                     1%       2%        1%         2%
                <S>                      <C>              <C>                        <C>      <C>      <C>        <C>
                ---------------------------------------------------------------------------------------------------------
                 1                       2000              3.95%                     $990     $981     $1,010     $1,020
                ---------------------------------------------------------------------------------------------------------
                 5                       2004              4.70%                     $957     $916     $1,045     $1,093
                ---------------------------------------------------------------------------------------------------------
                 10                      2009              5.05%                     $926     $858     $1,082     $1,171
                ---------------------------------------------------------------------------------------------------------
                 20                      2019              5.80%                     $892     $799     $1,128     $1,278
                ---------------------------------------------------------------------------------------------------------
                 30                      2029              5.95%                     $875     $773     $1,155     $1,350
                ---------------------------------------------------------------------------------------------------------
</TABLE>

           Source: MUNICIPAL MARKET DATA ( a division of Thomson Financial
           Municipal Group): "Aaa" yield curve as of 12/31/99. The table is not
           representative of price changes for inverse floating rate municipal
           obligations, which typically respond to changes in interest rates to
           a greater extent than comparable obligations.

            *Assumes no effect from market discount calculation.

           **Assumes bonds are non-callable.

           The Fund is not limited as to the maturities of the municipal
           obligations in which it may invest. Thus, a rise in the general level
           of interest rates may cause the price of the Fund's portfolio
           securities to fall substantially. In addition, the Fund may invest in
           securities with the lowest investment grade rating. These securities
           may have speculative characteristics.

           INVERSE FLOATING RATE MUNICIPAL OBLIGATIONS. The inverse floating
           rate municipal obligations in which the Fund may invest are typically
           created through a division of a fixed rate municipal obligation into
           two separate instruments, a short-term obligation and a long-term
           obligation. The interest rate on the short-term obligation is set at
           periodic auctions. The interest rate on the long-term obligation is
           the rate the issuer would have paid on the fixed-income obligation:
           (i) PLUS the difference between such fixed rate and the rate on the
           short-term obligation, if the short-term rate is lower than the fixed
           rate; or (ii) MINUS such difference if the interest rate on the
           short-term obligation is higher than the fixed rate. Inverse floating
           rate municipal obligations offer the potential for higher income than
           is available from fixed rate obligations of comparable maturity and
           credit rating. They also carry greater risks. In particular, the
           prices of inverse floating rate municipal obligations are more
           volatile, I.E., they increase and decrease in response to changes in
           interest rates to a greater extent than comparable fixed rate
           obligations.

                                                                               3
<PAGE>
[Sidebar]
ANNUAL TOTAL RETURNS

THIS CHART SHOWS HOW THE PERFORMANCE OF THE FUND'S CLASS B SHARES HAS VARIED
FROM YEAR TO YEAR OVER THE LAST 10 CALENDAR YEARS.

AVERAGE ANNUAL
TOTAL RETURNS

THIS TABLE COMPARES THE FUND'S AVERAGE ANNUAL RETURNS WITH THOSE OF A BROAD
MEASURE OF MARKET PERFORMANCE OVER TIME. THE FUND'S RETURNS INCLUDE THE MAXIMUM
APPLICABLE SALES CHARGE FOR EACH CLASS AND ASSUME YOU SOLD YOUR SHARES AT THE
END OF EACH PERIOD.
[End Sidebar]


           OTHER RISKS. The performance of the Fund also will depend on whether
           the Investment Manager is successful in pursuing the Fund's
           investment strategy. The Fund is also subject to other risks from its
           permissible investments, including the risks associated with its
           lease obligations investments. For more information about these
           risks, see the "Additional Risk Information" section.


           Shares of the Fund are not bank deposits and are not guaranteed or
           insured by the FDIC or any other government agency.

[ICON]  PAST PERFORMANCE
- --------------------------------------------------------------------------------
           The bar chart and table below provide some indication of the risks of
           investing in the Fund. The Fund's past performance does not indicate
           how the Fund will perform in the future.

ANNUAL TOTAL RETURNS - CALENDAR YEARS

EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC

<TABLE>
<S>  <C>
1990  5.69%
'91  10.18%
'92   7.83%
'93  10.97%
'94  -5.97%
'95  14.96%
'96   3.13%
'97   7.51%
'98   5.63%
'99  -3.99%
</TABLE>

The bar chart reflects the performance of Class B shares; the performance of the
other Classes will differ because the Classes have different ongoing fees. The
performance information in the bar chart does not reflect the deduction of sales
charges; if these amounts were reflected, returns would be less than shown.

During the periods shown in the bar chart, the highest return for a calendar
quarter was 6.11% (quarter ended March 31, 1995) and the lowest return for a
calendar quarter was -5.10% (quarter ended March 31, 1994).

<TABLE>
<CAPTION>
AVERAGE ANNUAL TOTAL RETURNS (AS OF DECEMBER 31, 1999)
- -------------------------------------------------------------------------------------
                                       PAST 1 YEAR      PAST 5 YEARS    PAST 10 YEARS
<S>                                   <C>               <C>             <C>
- -------------------------------------------------------------------------------------
 Class A(1)                                   -8.00%           --              --
- -------------------------------------------------------------------------------------
 Class B                                      -8.57%         4.94%           5.41%
- -------------------------------------------------------------------------------------
 Class C(1)                                   -5.33%           --              --
- -------------------------------------------------------------------------------------
 Class D(1)                                   -3.63%           --              --
- -------------------------------------------------------------------------------------
 Lehman Brothers Municipal Bond
 Index(2)                                     -2.06%         6.91%           6.89%
- -------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<S>    <C>
1      Classes A, C and D commenced operations on July 28, 1997.
2      The Lehman Brothers Municipal Bond Index tracks the
       performance of municipal bonds with maturities of two years
       or more and a minimum credit rating of Baa or BBB, as
       measured by Moody's Investors Service or Standard & Poor's
       Corp. The Index does not include any expenses, fees or
       charges. The Index is unmanaged and should not be considered
       an investment.
</TABLE>

 4
<PAGE>
[Sidebar]
SHAREHOLDER FEES

THESE FEES ARE PAID DIRECTLY FROM YOUR INVESTMENT.

ANNUAL FUND OPERATING EXPENSES

THESE EXPENSES ARE DEDUCTED FROM THE FUND'S ASSETS AND ARE BASED ON EXPENSES
PAID FOR THE FISCAL YEAR ENDED DECEMBER 31, 1999.
[End Sidebar]
[ICON]  FEES AND EXPENSES
- --------------------------------------------------------------------------------
           The table below briefly describes the fees and expenses that you may
           pay if you buy and hold shares of the Fund. The Fund offers four
           Classes of shares: Classes A, B, C and D. Each Class has a different
           combination of fees, expenses and other features. The Fund does not
           charge account or exchange fees. See the "Share Class Arrangements"
           section for further fee and expense information.

<TABLE>
<CAPTION>
                                            CLASS A    CLASS B    CLASS C    CLASS D
<S>                                         <C>        <C>        <C>        <C>
- -------------------------------------------------------------------------------------
 SHAREHOLDER FEES
- -------------------------------------------------------------------------------------
 Maximum sales charge (load) imposed on
 purchases (as a percentage of offering
 price)                                      4.25%(1)  None       None        None
- -------------------------------------------------------------------------------------
 Maximum deferred sales charge (load) (as
 a percentage based on the lesser of the
 offering price or net asset value at
 redemption)                                None(2)     5.00%(3)   1.00%(4)   None
- -------------------------------------------------------------------------------------
 ANNUAL FUND OPERATING EXPENSES
- -------------------------------------------------------------------------------------
 Management fee                             0.54%       0.54%      0.54%      0.54%
- -------------------------------------------------------------------------------------
 Distribution and service (12b-1) fees      0.19%       0.75%      0.75%      None
- -------------------------------------------------------------------------------------
 Other expenses                             0.05%       0.05%      0.05%      0.05%
- -------------------------------------------------------------------------------------
 Total annual Fund operating expenses       0.78%       1.34%      1.34%      0.59%
- -------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<S>        <C>
(1)        Reduced for purchases of $25,000 and over.
(2)        Investments that are not subject to any sales charge at the
           time of purchase are subject to a contingent deferred sales
           charge ("CDSC") of 1.00% that will be imposed if you sell
           your shares within one year after purchase, except for
           certain specific circumstances.
(3)        The CDSC is scaled down to 1.00% during the sixth year,
           reaching zero thereafter. See "Share Class Arrangements" for
           a complete discussion of the CDSC.
(4)        Only applicable if you sell your shares within one year
           after purchase.
</TABLE>

   EXAMPLE

   This example is intended to help you compare the cost of investing in
   the Fund with the cost of investing in other mutual funds.

   The example assumes that you invest $10,000 in the Fund, your
   investment has a 5% return each year, and the Fund's operating
   expenses remain the same. Although your actual costs may be higher or
   lower, the tables below show your costs at the end of each period
   based on these assumptions depending upon whether or not you sell
   your shares at the end of each period.

<TABLE>
<CAPTION>
                                      IF YOU SOLD YOUR SHARES:                            IF YOU HELD YOUR SHARES:
                            --------------------------------------------        --------------------------------------------
                             1 YEAR     3 YEARS     5 YEARS     10 YEARS         1 YEAR     3 YEARS     5 YEARS     10 YEARS
<S>                         <C>         <C>         <C>         <C>             <C>         <C>         <C>         <C>
- ------------------------------------------------------------------------        --------------------------------------------
 CLASS A                      $501        $664        $840       $1,350           $501        $664        $840       $1,350
- ------------------------------------------------------------------------        --------------------------------------------
 CLASS B                       636         725         934        1,613            136         425         734        1,613
- ------------------------------------------------------------------------        --------------------------------------------
 CLASS C                       236         425         734        1,613            136         425         734        1,613
- ------------------------------------------------------------------------        --------------------------------------------
 CLASS D                        60         189         329          738             60         189         329          738
- ------------------------------------------------------------------------        --------------------------------------------
</TABLE>

           Long-term shareholders of Class B and Class C may pay more in sales
           charges, including distribution fees, than the economic equivalent of
           the maximum front-end sales charges permitted by the NASD.

                                                                               5
<PAGE>
[ICON]  ADDITIONAL INVESTMENT STRATEGY INFORMATION
- --------------------------------------------------------------------------------
           This section provides additional information relating to the Fund's
           principal strategies.

           The Fund's policy of investing at least 80% of its assets in
           securities the interest on which is exempt from federal income taxes
           and California state income taxes, except for "defensive" investing
           discussed below, is fundamental. This fundamental policy may not be
           changed without shareholder approval. The percentage limitations
           relating to the composition of the Fund's portfolio apply at the time
           the Fund acquires an investment and refer to the Fund's net assets,
           unless otherwise noted. Subsequent percentage changes that result
           from market fluctuations will not require the Fund to sell any
           portfolio security. The Fund may change its principal investment
           strategies without shareholder approval; however, you would be
           notified of any changes.


           LEASE OBLIGATIONS. Included within the revenue bonds category are
           participations in lease obligations or installment purchase contracts
           of municipalities. Generally, state and local agencies or authorities
           issue lease obligations to finance equipment and facilities for
           public and private purposes.


           DEFENSIVE INVESTING. The Fund may take temporary "defensive"
           positions in attempting to respond to adverse market conditions. The
           Fund may invest any amount of its assets in taxable money market
           securities, non-California tax-exempt securities or in tax-exempt
           securities subject to the alternative minimum tax for individual
           shareholders when the Investment Manager believes it is advisable to
           do so. The Fund will only purchase municipal obligations of other
           states that satisfy the same standards as set forth for the
           California tax-exempt securities. Although taking a defensive posture
           is designed to protect the Fund from an anticipated market downturn,
           it could have the effect of reducing the Fund's ability to provide
           California tax-exempt income. When the Fund takes a defensive
           position, it may not achieve its investment objective.

[ICON]  ADDITIONAL RISK INFORMATION
- --------------------------------------------------------------------------------
           This section provides additional information relating to the
           principal risks of investing in the Fund.

           BOND INSURANCE RISK. Many of the municipal obligations the Fund
           invests in will be covered by insurance at the time of issuance or at
           a later date. Such insurance covers the remaining term of the
           security. Insured municipal obligations would generally be assigned a
           lower rating if the rating were based primarily on the credit quality
           of the issuer without regard to the insurance feature. If the
           claims-paying ability of the insurer were downgraded, the ratings on
           the municipal obligations it insures may also be downgraded.

 6
<PAGE>
[Sidebar]
MORGAN STANLEY DEAN WITTER ADVISORS INC.

THE INVESTMENT MANAGER IS WIDELY RECOGNIZED AS A LEADER IN THE MUTUAL FUND
INDUSTRY AND TOGETHER WITH MORGAN STANLEY DEAN WITTER SERVICES COMPANY, INC.,
ITS WHOLLY-OWNED SUBSIDIARY, HAD APPROXIMATELY $145 BILLION IN ASSETS UNDER
MANAGEMENT AS OF JANUARY 31, 2000.
[End Sidebar]

           LEASE OBLIGATIONS. Lease obligations may have risks not normally
           associated with general obligation or other revenue bonds. Leases and
           installment purchase or conditional sale contracts (which may provide
           for title to the leased asset to pass eventually to the issuer) have
           developed in part, as a means for governmental issuers to acquire
           property and equipment without the necessity of complying with the
           constitutional and statutory requirements generally applicable for
           the issuance of debt. Certain lease obligations contain
           "non-appropriation" clauses that provide that the governmental issuer
           has no obligation to make future payments under the lease or contract
           unless money is appropriated for that purpose by the appropriate
           legislative body on an annual or other periodic basis. Consequently,
           continued lease payments on those lease obligations containing
           "non-appropriation" clauses are dependent on future legislative
           actions. If these legislative actions do not occur, the holders of
           the lease obligation may experience difficulty in exercising their
           rights, including disposition of the property.


[ICON]  FUND MANAGEMENT
- --------------------------------------------------------------------------------
             The Fund has retained the Investment Manager -- Morgan Stanley Dean
             Witter Advisors Inc. -- to provide administrative services, manage
             its business affairs and invest its assets, including the placing
             of orders for the purchase and sale of portfolio securities. The
             Investment Manager is a wholly-owned subsidiary of Morgan Stanley
             Dean Witter & Co., a preeminent global financial services firm that
             maintains leading market positions in each of its three primary
             businesses: securities, asset management and credit services. Its
             main business office is located at Two World Trade Center, New
             York, NY 10048.

             The Fund's portfolio is managed within the Investment Manager's
             Tax-Exempt Group. James F. Willison, a Senior Vice President of the
             Investment Manager and Director of the Tax-Exempt Fixed-Income
             Group of the Investment Manager, has been a primary portfolio
             manager of the Fund since its inception. Joseph R. Arcieri, a
             Senior Vice President of the Investment Manager, has been a primary
             portfolio manager of the Fund since February 1997. Messrs. Willison
             and Arcieri have been portfolio managers with the Investment
             Manager for over five years.

             The Fund pays the Investment Manager a monthly management fee as
             full compensation for the services and facilities furnished to the
             Fund, and for Fund expenses assumed by the Investment Manager. The
             fee is based on the Fund's average daily net assets. For the fiscal
             year ended December 31, 1999, the Fund accrued total compensation
             to the Investment Manager amounting to 0.54% of the Fund's average
             daily net assets.

                                                                               7
<PAGE>
[Sidebar]
CONTACTING A FINANCIAL ADVISOR

IF YOU ARE NEW TO THE MORGAN STANLEY DEAN WITTER FAMILY OF FUNDS AND WOULD LIKE
TO CONTACT A FINANCIAL ADVISOR, CALL (877) 937-MSDW (TOLL-FREE) FOR THE
TELEPHONE NUMBER OF THE MORGAN STANLEY DEAN WITTER OFFICE NEAREST YOU. YOU MAY
ALSO ACCESS OUR OFFICE LOCATOR ON OUR INTERNET SITE AT:
www.msdw.com/individual/funds
[End Sidebar]

SHAREHOLDER INFORMATION

[ICON]  PRICING FUND SHARES
- --------------------------------------------------------------------------------
           The price of Fund shares (excluding sales charges), called "net asset
           value," is based on the value of the Fund's portfolio securities.
           While the assets of each Class are invested in a single portfolio of
           securities, the net asset value of each Class will differ because the
           Classes have different ongoing distribution fees.

           The net asset value per share of the Fund is determined once daily at
           4:00 p.m. Eastern time on each day that the New York Stock Exchange
           is open (or, on days when the New York Stock Exchange closes prior to
           4:00 p.m., at such earlier time). Shares will not be priced on days
           that the New York Stock Exchange is closed.

           The Fund's portfolio securities (except for short-term taxable debt
           securities and certain other investments) are valued by an outside
           independent pricing service. The service uses a computerized grid
           matrix of tax-exempt securities and its evaluations in determining
           what it believes is the fair value of the portfolio securities. The
           Fund's Board of Trustees believes that timely and reliable market
           quotations are generally not readily available to the Fund to value
           tax-exempt securities and the valuations that the pricing service
           supplies are more likely to approximate the fair value of the
           securities.

           An exception to the Fund's general pricing policy concerns its
           short-term debt portfolio securities. Debt securities with remaining
           maturities of sixty days or less at the time of purchase are valued
           at amortized cost. However, if the cost does not reflect the
           securities' market value, these securities will be valued at their
           fair value.

[ICON]  HOW TO BUY SHARES
- --------------------------------------------------------------------------------
             You may open a new account to buy Fund shares or buy additional
             Fund shares for an existing account by contacting your Morgan
             Stanley Dean Witter Financial Advisor or other authorized financial
             representative. Your Financial Advisor will assist you,
             step-by-step, with the procedures to invest in the Fund. You may
             also purchase shares directly by calling the Fund's transfer agent
             and requesting an application.

             Because every investor has different immediate financial needs and
             long-term investment goals, the Fund offers investors four Classes
             of shares: Classes A, B, C and D. Class D shares are only offered
             to a limited group of investors. Each Class of shares offers a
             distinct structure of sales charges, distribution and service fees,
             and other features that are designed to address a variety of needs.
             Your Financial Advisor or other authorized financial representative
             can help you decide which Class may be most appropriate for you.
             When purchasing Fund shares, you must specify which Class of shares
             you wish to purchase.

 8
<PAGE>
[Sidebar]
EASYINVEST-SM-

A PURCHASE PLAN THAT ALLOWS YOU TO TRANSFER MONEY AUTOMATICALLY FROM YOUR
CHECKING OR SAVINGS ACCOUNT OR FROM A MONEY MARKET FUND ON A SEMI-MONTHLY,
MONTHLY OR QUARTERLY BASIS. CONTACT YOUR MORGAN STANLEY DEAN WITTER FINANCIAL
ADVISOR FOR FURTHER INFORMATION ABOUT THIS SERVICE.
[End Sidebar]

           When you buy Fund shares, the shares are purchased at the next share
           price calculated, less any applicable front-end sales charge, after
           we receive your purchase order. Your payment is due on the third
           business day after you place your purchase order. We reserve the
           right to reject any order for the purchase of Fund shares.

<TABLE>
<CAPTION>
MINIMUM INVESTMENT AMOUNTS
- ------------------------------------------------------------------------------
                                                        MINIMUM INVESTMENT
                                                    --------------------------
INVESTMENT OPTIONS                                  INITIAL         ADDITIONAL
<S>                       <C>                       <C>             <C>
- ------------------------------------------------------------------------------
 Regular Accounts                                   $1,000            $100
- ------------------------------------------------------------------------------
 EASYINVEST-SM-
 (Automatically from
 your checking or
 savings account or
 Money Market Fund)                                  $100*            $100*
- ------------------------------------------------------------------------------

                      *  Provided your schedule of investments totals $1,000 in
                         twelve months.
</TABLE>

           There is no minimum investment amount if you purchase Fund shares
           through: (1) the Investment Manager's mutual fund asset allocation
           plan, (2) a program, approved by the Fund's distributor, in which you
           pay an asset-based fee for advisory, administrative and/or brokerage
           services, or (3) employer-sponsored employee benefit plan accounts.

           INVESTMENT OPTIONS FOR CERTAIN INSTITUTIONAL AND OTHER
           INVESTORS/CLASS D SHARES. To be eligible to purchase Class D shares,
           you must qualify under one of the investor categories specified in
           the "Share Class Arrangements" section of this PROSPECTUS.

           SUBSEQUENT INVESTMENTS SENT DIRECTLY TO THE FUND. In addition to
           buying additional Fund shares for an existing account by contacting
           your Morgan Stanley Dean Witter Financial Advisor, you may send a
           check directly to the Fund. To buy additional shares in this manner:

           - Write a "letter of instruction" to the Fund specifying the name(s)
             on the account, the account number, the social security or tax
             identification number, the Class of shares you wish to purchase and
             the investment amount (which would include any applicable front-end
             sales charge). The letter must be signed by the account owner(s).

           - Make out a check for the total amount payable to: Morgan Stanley
             Dean Witter California Tax-Free Income Fund.

           - Mail the letter and check to Morgan Stanley Dean Witter Trust FSB
             at P.O. Box 1040, Jersey City, NJ 07303.

                                                                               9
<PAGE>
[ICON]  HOW TO EXCHANGE SHARES
- --------------------------------------------------------------------------------
           PERMISSIBLE FUND EXCHANGES. You may exchange shares of any Class of
           the Fund for the same Class of any other continuously offered
           Multi-Class Fund, or for shares of a No-Load Fund, a Money Market
           Fund, North American Government Income Trust or Short-Term U.S.
           Treasury Trust, without the imposition of an exchange fee. See the
           inside back cover of this PROSPECTUS for each Morgan Stanley Dean
           Witter Fund's designation as a Multi-Class Fund, No-Load Fund or
           Money Market Fund. If a Morgan Stanley Dean Witter Fund is not
           listed, consult the inside back cover of that fund's prospectus for
           its designation. For purposes of exchanges, shares of FSC Funds
           (subject to a front-end sales charge) are treated as Class A shares
           of a Multi-Class Fund.


           Exchanges may be made after shares of the Fund acquired by purchase
           have been held for thirty days. There is no waiting period for
           exchanges of shares acquired by exchange or dividend reinvestment.
           The current prospectus for each fund describes its investment
           objective(s) and policies and should be read before investment. Since
           exchanges are available only into continuously offered Morgan Stanley
           Dean Witter Funds, exchanges are not available into any new Morgan
           Stanley Dean Witter Fund during its initial offering period, or when
           shares of a particular Morgan Stanley Dean Witter Fund are not being
           offered for purchase.


           EXCHANGE PROCEDURES. You can process an exchange by contacting your
           Morgan Stanley Dean Witter Financial Advisor or other authorized
           financial representative. Otherwise, you must forward an exchange
           privilege authorization form to the Fund's transfer agent - Morgan
           Stanley Dean Witter Trust FSB - and then write the transfer agent or
           call (800) 869-NEWS to place an exchange order. You can obtain an
           exchange privilege authorization form by contacting your Financial
           Advisor or other authorized financial representative, or by calling
           (800) 869-NEWS. If you hold share certificates, no exchanges may be
           processed until we have received all applicable share certificates.


           An exchange to any Morgan Stanley Dean Witter Fund (except a Money
           Market Fund) is made on the basis of the next calculated net asset
           values of the funds involved after the exchange instructions are
           accepted. When exchanging into a Money Market Fund, the Fund's shares
           are sold at their next calculated net asset value and the Money
           Market Fund's shares are purchased at their net asset value on the
           following business day.


           The Fund may terminate or revise the exchange privilege upon required
           notice. The check writing privilege is not available for Money Market
           Fund shares you acquire in an exchange.

           TELEPHONE EXCHANGES. For your protection when calling Morgan Stanley
           Dean Witter Trust FSB, we will employ reasonable procedures to
           confirm that exchange instructions communicated over the telephone
           are genuine. These procedures may include requiring various forms of
           personal identification such as name, mailing address, social
           security or other tax identification number. Telephone instructions
           also may be recorded.

 10
<PAGE>
           Telephone instructions will be accepted if received by the Fund's
           transfer agent between 9:00 a.m. and 4:00 p.m. Eastern time on any
           day the New York Stock Exchange is open for business. During periods
           of drastic economic or market changes, it is possible that the
           telephone exchange procedures may be difficult to implement, although
           this has not been the case with the Fund in the past.

           MARGIN ACCOUNTS. If you have pledged your Fund shares in a margin
           account, contact your Morgan Stanley Dean Witter Financial Advisor or
           other authorized financial representative regarding restrictions on
           the exchange of such shares.


           TAX CONSIDERATIONS OF EXCHANGES. If you exchange shares of the Fund
           for shares of another Morgan Stanley Dean Witter Fund, there are
           important tax considerations. For tax purposes, the exchange out of
           the Fund is considered a sale of Fund shares - and the exchange into
           the other fund is considered a purchase. As a result, you may realize
           a capital gain or loss.


           You should review the "Tax Consequences" section and consult your own
           tax professional about the tax consequences of an exchange.

           LIMITATIONS ON EXCHANGES. Certain patterns of exchanges may result in
           the Fund limiting or prohibiting, at its discretion, additional
           purchases and/or exchanges. Determinations in this regard may be made
           based on the frequency or dollar amount of previous exchanges. The
           Fund will notify you in advance of limiting your exchange privileges.

           CDSC CALCULATIONS ON EXCHANGES. See the "Share Class Arrangements"
           section of this PROSPECTUS for a discussion of how applicable
           contingent deferred sales charges (CDSCs) are calculated for shares
           of one Morgan Stanley Dean Witter Fund that are exchanged for shares
           of another.

           For further information regarding exchange privileges, you should
           contact your Morgan Stanley Dean Witter Financial Advisor or call
           (800) 869-NEWS.

[ICON]  HOW TO SELL SHARES
- --------------------------------------------------------------------------------
           You can sell some or all of your Fund shares at any time. If you sell
           Class A, Class B or Class C shares, your net sale proceeds are
           reduced by the amount of any applicable CDSC. Your shares will be
           sold at the next share price calculated after we receive your order
           to sell as described below.

<TABLE>
<CAPTION>
OPTIONS                 PROCEDURES
<S>                     <C>
- ------------------------------------------------------------------------------------
 Contact your           To sell your shares, simply call your Morgan Stanley Dean
 Financial Advisor      Witter Financial Advisor or other authorized financial
                        representative.
                        ------------------------------------------------------------
[ICON]                  Payment will be sent to the address to which the account is
                        registered or deposited in your brokerage account.
- ------------------------------------------------------------------------------------
</TABLE>

                                                                              11
<PAGE>


<TABLE>
<CAPTION>
OPTIONS                 PROCEDURES
<S>                     <C>
- ------------------------------------------------------------------------------------
 By Letter              You can also sell your shares by writing a "letter of
                        instruction" that includes:
- ------------------------------------------------------------------------------------
[ICON]                  - your account number;
- ------------------------------------------------------------------------------------
                        - the dollar amount or the number of shares you wish to
                          sell;
- ------------------------------------------------------------------------------------
                        - the Class of shares you wish to sell; and
- ------------------------------------------------------------------------------------
                        - the signature of each owner as it appears on the account.
- ------------------------------------------------------------------------------------
                        If you are requesting payment to anyone other than the
                        registered owner(s) or that payment be sent to any address
                        other than the address of the registered owner(s) or
                        pre-designated bank account, you will need a signature
                        guarantee. You can obtain a signature guarantee from an
                        eligible guarantor acceptable to Morgan Stanley Dean Witter
                        FSB. (You should contact Morgan Stanley Dean Witter Trust
                        FSB at (800) 869-NEWS for a determination as to whether a
                        particular institution is an eligible guarantor.) A notary
                        public CANNOT provide a signature guarantee. Additional
                        documentation may be required for shares held by a
                        corporation, partnership, trustee or executor.
- ------------------------------------------------------------------------------------
                        Mail the letter to Morgan Stanley Dean Witter Trust FSB at
                        P.O.Box 983, Jersey City, NJ 07303. If you hold share
                        certificates, you must return the certificates, along with
                        the letter and any required additional documentation.
- ------------------------------------------------------------------------------------
                        A check will be mailed to the name(s) and address in which
                        the account is registered, or otherwise according to your
                        instructions.
- ------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------
 Systematic             If your investment in all of the Morgan Stanley Dean Witter
 Withdrawal Plan        Family of Funds has a total market value of at least
 ICON                   $10,000, you may elect to withdraw amounts of $25 or more,
                        or in any whole percentage of a fund's balance (provided the
                        amount is at least $25), on a monthly, quarterly,
                        semi-annual or annual basis, from any fund with a balance of
                        at least $1,000. Each time you add a fund to the plan, you
                        must meet the plan requirements.
                        ------------------------------------------------------------
                        Amounts withdrawn are subject to any applicable CDSC. A CDSC
                        may be waived under certain circumstances. See the Class B
                        waiver categories listed in the "Share Class Arrangements"
                        section of this PROSPECTUS.
                        ------------------------------------------------------------
                        To sign up for the Systematic Withdrawal Plan, contact your
                        Morgan Stanley Dean Witter Financial Advisor or call
                        (800) 869-NEWS. You may terminate or suspend your plan at
                        any time. Please remember that withdrawals from the plan are
                        sales of shares, not Fund "distributions," and ultimately
                        may exhaust your account balance. The Fund may terminate or
                        revise the plan at any time.
- ------------------------------------------------------------------------------------
</TABLE>


           PAYMENT FOR SOLD SHARES. After we receive your complete instructions
           to sell as described above, a check will be mailed to you within
           seven days, although we will attempt to make payment within one
           business day. Payment may also be sent to your brokerage account.

           Payment may be postponed or the right to sell your shares suspended
           under unusual circumstances. If you request to sell shares that were
           recently purchased by check, your sale will not effected until it has
           been verified that the check has been honored.

           REINSTATEMENT PRIVILEGE. If you sell Fund shares and have not
           previously exercised the reinstatement privilege, you may, within 35
           days after the date of sale, invest any portion of the proceeds in
           the same Class of Fund shares at their net asset value and receive a
           pro rata credit for any CDSC paid in connection with the sale.

           INVOLUNTARY SALES. The Fund reserves the right, on sixty days'
           notice, to sell the shares of any shareholder (other than shares held
           in an IRA or 403(b) Custodial Account)

 12
<PAGE>
[Sidebar]
TARGETED DIVIDENDS-SM-

YOU MAY SELECT TO HAVE YOUR FUND DISTRIBUTIONS AUTOMATICALLY INVESTED IN OTHER
CLASSES OF FUND SHARES OR CLASSES OF ANOTHER MORGAN STANLEY DEAN WITTER FUND
THAT YOU OWN. CONTACT YOUR MORGAN STANLEY DEAN WITTER FINANCIAL ADVISOR FOR
FURTHER INFORMATION ABOUT THIS SERVICE.
[End Sidebar]

           whose shares, due to sales by the shareholder, have a value below
           $100, or in the case of an account opened through EASYINVEST -SM-, if
           after 12 months the shareholder has invested less than $1,000 in the
           account.

           However, before the Fund sells your shares in this manner, we will
           notify you and allow you sixty days to make an additional investment
           in an amount that will increase the value of your account to at least
           the required amount before the sale is processed. No CDSC will be
           imposed on any involuntary sale.

           MARGIN ACCOUNTS. If you have pledged your Fund shares in a margin
           account, contact your Morgan Stanley Dean Witter Financial Advisor or
           other authorized financial representative regarding restrictions on
           the sale of such shares.

[ICON]  DISTRIBUTIONS
- --------------------------------------------------------------------------------

             The Fund passes substantially all of its earnings from income and
             capital gains along to its investors as "distributions." The Fund
             earns interest from fixed-income investments. These amounts are
             passed along to Fund shareholders as "income dividend
             distributions." The Fund realizes capital gains whenever it sells
             securities for a higher price than it paid for them. These amounts
             may be passed along as "capital gain distributions."

             The Fund declares income dividends separately for each Class.
             Distributions paid on Class A and Class D shares will be higher
             than for Class B and Class C because distribution fees that
             Class B and Class C pay are higher. Normally, income dividends are
             declared on each day the New York Stock Exchange is open for
             business, and are
             distributed to shareholders monthly. Capital gains, if any, are
             usually distributed in June and December. The Fund, however, may
             retain and reinvest any long-term capital gains. The Fund may at
             times make payments from sources other than income or capital gains
             that represent a return of a portion of your investment.

             Distributions are reinvested automatically in additional shares of
             the same Class and automatically credited to your account, unless
             you request in writing that all distributions be paid in cash. If
             you elect the cash option, processing of your dividend checks
             begins immediately following the monthly payment date, and the Fund
             will mail a monthly dividend check to you normally during the first
             seven days of the following month. No interest will accrue on
             uncashed checks. If you wish to change how your distributions are
             paid, your request should be received by the Fund's transfer agent,
             Morgan Stanley Dean Witter Trust FSB, at least five business days
             prior to the record date of the distributions.

                                                                              13
<PAGE>
[ICON]  TAX CONSEQUENCES
- --------------------------------------------------------------------------------
           As with any investment, you should consider how your Fund investment
           will be taxed. The tax information in this PROSPECTUS is provided as
           general information. You should consult your own tax professional
           about the tax consequences of an investment in the Fund.

           You need to be aware of the possible tax consequences when:

           - The Fund makes distributions; and

           - You sell Fund shares, including an exchange to another Morgan
             Stanley Dean Witter Fund.


           TAXES ON DISTRIBUTIONS. Your income dividend distributions are
           normally exempt from federal and California personal income taxes --
           to the extent they are derived from California's municipal
           obligations. Income derived from other portfolio securities may be
           subject to federal, state and/or local income taxes.


           Income derived from some municipal securities is subject to the
           federal "alternative minimum tax." Certain tax-exempt securities
           whose proceeds are used to finance private, for-profit organizations
           are subject to this special tax system that ensures that individuals
           pay at least some federal taxes. Although interest on these
           securities is generally exempt from federal income tax, some
           taxpayers who have many tax deductions or exemptions nevertheless may
           have to pay tax on the income.

           If you borrow money to purchase shares of the Fund, the interest on
           the borrowed money is generally not deductible for personal income
           tax purposes.

           If the Fund makes any capital gain distributions, those distributions
           will normally be subject to federal and California income tax when
           they are paid, whether you take them in cash or reinvest them in the
           Fund shares. Any long-term capital gain distributions are taxable to
           you as long-term capital gains, no matter how long you have owned
           shares in the Fund.

           The Fund may derive gains in part from municipal obligations the Fund
           purchased below their principal or face values. All, or a portion, of
           these gains may be taxable to you as ordinary income rather than
           capital gains.

           Every January, you will be sent a statement (IRS Form 1099-DIV)
           showing the taxable distributions paid to you in the previous year.
           The statement provides information on your dividends and capital
           gains for tax purposes.

           TAXES ON SALES. Your sale of Fund shares normally is subject to
           federal and state income tax and may result in a taxable gain or loss
           to you. A sale also may be subject to local income tax. Your exchange
           of Fund shares for shares of another Morgan Stanley Dean Witter Fund
           is treated for tax purposes like a sale of your original shares and a
           purchase of your new shares. Thus, the exchange may, like a sale,
           result in a taxable gain or loss to you and will give you a new tax
           basis for your new shares.

 14
<PAGE>
           When you open your Fund account, you should provide your social
           security or tax identification number on your investment application.
           By providing this information, you will avoid being subject to a
           federal backup withholding tax of 31% on taxable distributions and
           redemption proceeds. Any withheld amount would be sent to the IRS as
           an advance tax payment.

[ICON]  SHARE CLASS ARRANGEMENTS
- --------------------------------------------------------------------------------
           The Fund offers several Classes of shares having different
           distribution arrangements designed to provide you with different
           purchase options according to your investment needs. Your Morgan
           Stanley Dean Witter Financial Advisor or other authorized financial
           representative can help you decide which Class may be appropriate for
           you.


           The general public is offered three Classes: Class A shares, Class B
           shares and Class C shares, which differ principally in terms of sales
           charges and ongoing expenses. A fourth Class, Class D shares, is
           offered only to a limited category of investors. Shares that you
           acquire through reinvested distributions will not be subject to any
           front-end sales charge or CDSC - contingent deferred sales charge.
           Sales personnel may receive different compensation for selling each
           Class of shares. The sales charges applicable to each Class provide
           for the distribution financing of shares of that Class.


           The chart below compares the sales charge and maximum annual 12b-1
           fee applicable to each Class:

<TABLE>
<CAPTION>
                                                                                                 MAXIMUM
CLASS                      SALES CHARGE                                                      ANNUAL 12B-1 FEE
<S>                        <C>                                                               <C>
- -------------------------------------------------------------------------------------------------------------
 A                         Maximum 4.25% initial sales charge reduced for purchase of
                           $25,000 or more; shares sold without an initial sales charge
                           are generally subject to a 1.0% CDSC during the first year             0.25%
- -------------------------------------------------------------------------------------------------------------
 B                         Maximum 5.0% CDSC during the first year decreasing to 0%
                           after six years                                                        0.75%
- -------------------------------------------------------------------------------------------------------------
 C                         1.0% CDSC during the first year                                        0.75%
- -------------------------------------------------------------------------------------------------------------
 D                         None                                                                None
- -------------------------------------------------------------------------------------------------------------
</TABLE>

         CLASS A SHARES  Class A shares are sold at net asset value plus an
         initial sales charge of up to 4.25%. The initial sales charge is
         reduced for purchases of $25,000 or more according to the schedule
         below. Investments of $1 million or more are not subject to an initial
         sales charge, but are generally subject to a contingent deferred sales
         charge, or CDSC, of 1.0% on sales made within one year after the last
         day of the month of purchase. The CDSC will be assessed in the same
         manner and with the same CDSC waivers as with Class B shares. Class A
         shares are also subject to a distribution (12b-1) fee of up to 0.25% of
         the average daily net assets of the Class.

                                                                              15
<PAGE>
[Sidebar]
FRONT-END SALES CHARGE OR FSC

AN INITIAL SALES CHARGE YOU PAY WHEN PURCHASING CLASS A SHARES THAT IS BASED ON
A PERCENTAGE OF THE OFFERING PRICE. THE PERCENTAGE DECLINES BASED UPON THE
DOLLAR VALUE OF CLASS A SHARES YOU PURCHASE. WE OFFER THREE WAYS TO REDUCE YOUR
CLASS A SALES CHARGES - THE COMBINED PURCHASE PRIVILEGE, RIGHT OF ACCUMULATION
AND LETTER OF INTENT.
[End Sidebar]

           The offering price of Class A shares includes a sales charge
           (expressed as a percentage of the offering price) on a single
           transaction as shown in the following table:

<TABLE>
<CAPTION>
                                               FRONT-END SALES CHARGE
                                  -------------------------------------------------
                                      PERCENTAGE OF          APPROXIMATE PERCENTAGE
AMOUNT OF SINGLE TRANSACTION      PUBLIC OFFERING PRICE      OF NET AMOUNT INVESTED
<S>                               <C>                        <C>
- -----------------------------------------------------------------------------------
 Less than $25,000                        4.25%                      4.44%
- -----------------------------------------------------------------------------------
 $25,000 but less than
 $50,000                                  4.00%                      4.17%
- -----------------------------------------------------------------------------------
 $50,000 but less than
 $100,000                                 3.50%                      3.63%
- -----------------------------------------------------------------------------------
 $100,000 but less than
 $250,000                                 2.75%                      2.83%
- -----------------------------------------------------------------------------------
 $250,000 but less than $1
 million                                  1.75%                      1.78%
- -----------------------------------------------------------------------------------
 $1 million and over                         0                          0
- -----------------------------------------------------------------------------------
</TABLE>

           The reduced sales charge schedule is applicable to purchases of Class
           A shares in a single transaction by:

           - A single account (including an individual, trust or
             fiduciary account).

           - Family member accounts (limited to husband, wife
             and children under the age of 21).

           - Pension, profit sharing or other employee benefit plans of
             companies and their affiliates.

           - Tax-exempt organizations.

           - Groups organized for a purpose other than to buy mutual fund
             shares.

           COMBINED PURCHASE PRIVILEGE. You also will have the benefit of
           reduced sales charges by combining purchases of Class A shares of the
           Fund in a single transaction with purchases of Class A shares of
           other Multi-Class Funds and shares of FSC Funds.

           RIGHT OF ACCUMULATION. You also may benefit from a reduction of sales
           charges if the cumulative net asset value of Class A shares of the
           Fund purchased in a single transaction, together with shares of other
           Funds you currently own which were previously purchased at a price
           including a front-end sales charge (including shares acquired through
           reinvestment of distributions), amounts to $25,000 or more. Also, if
           you have a cumulative net asset value of all your Class A and
           Class D shares equal to at least $5 million, you are eligible to
           purchase Class D shares of any Fund subject to the Fund's minimum
           initial investment requirement.

           You must notify your Morgan Stanley Dean Witter Financial Advisor or
           other authorized financial representative (or Morgan Stanley Dean
           Witter Trust FSB if you purchase directly through the Fund), at the
           time a purchase order is placed, that the purchase qualifies for the
           reduced charge under the Right of Accumulation. Similar notification
           must be made in writing when an order is placed by mail. The reduced
           sales charge will

 16
<PAGE>
           not be granted if: (i) notification is not furnished at the time of
           the order; or (ii) a review of the records of Dean Witter Reynolds or
           other authorized dealer of Fund shares or the Fund's transfer agent
           does not confirm your represented holdings.

           LETTER OF INTENT. The schedule of reduced sales charges for larger
           purchases also will be available to you if you enter into a written
           "letter of intent." A letter of intent provides for the purchase of
           shares of Class A of the Fund or other Multi-Class Funds or shares of
           FSC Funds within a thirteen-month period. The initial purchase under
           a letter of intent must be at least 5% of the stated investment goal.
           To determine the applicable sales charge reduction, you may also
           include: (1) the cost of shares of other Morgan Stanley Dean Witter
           Funds which were previously purchased at a price including a
           front-end sales charge during the 90-day period prior to the
           distributor receiving the letter of intent, and (2) the cost of
           shares of other Funds you currently own acquired in exchange for
           shares of Funds purchased during that period at a price including a
           front-end sales charge. You can obtain a letter of intent by
           contacting your Morgan Stanley Dean Witter Financial Advisor or other
           authorized financial representative, or by calling (800) 869-NEWS. If
           you do not achieve the stated investment goal within the thirteen-
           month period, you are required to pay the difference between the
           sales charges otherwise applicable and sales charges actually paid,
           which may be deducted from your investment.

           OTHER SALES CHARGE WAIVERS. In addition to investments of $1 million
           or more, your purchase of Class A shares is not subject to a
           front-end sales charge (or a CDSC upon sale) if your account
           qualifies under one of the following categories:

           - A trust for which Morgan Stanley Dean Witter Trust FSB provides
             discretionary trustee services.

           - Persons participating in a fee-based investment program (subject to
             all of its terms and conditions, including termination fees,
             mandatory sale or transfer restrictions on termination) approved by
             the Fund's distributor pursuant to which they pay an asset-based
             fee for investment advisory, administrative and/or brokerage
             services.

           - A client of a Morgan Stanley Dean Witter Financial Advisor who
             joined us from another investment firm within six months prior to
             the date of purchase of Fund shares, and used the proceeds from the
             sale of shares of a proprietary mutual fund of that Financial
             Advisor's previous firm that imposed either a front-end or deferred
             sales charge to purchase Class A shares, provided that: (1) you
             sold the shares not more than 60 days prior to purchase, and (2)
             the sale proceeds were maintained in the interim in cash or a money
             market fund.

           - Current or retired Directors/Trustees of the Morgan Stanley Dean
             Witter Funds, such persons' spouses and children under the age of
             21, and trust accounts for which any of such persons is a
             beneficiary.

                                                                              17
<PAGE>
[Sidebar]
CONTINGENT DEFERRED SALES CHARGE OR CDSC

A FEE YOU PAY WHEN YOU SELL SHARES OF CERTAIN MORGAN STANLEY DEAN WITTER FUNDS
PURCHASED WITHOUT AN INITIAL SALES CHARGE. THIS FEE DECLINES THE LONGER YOU HOLD
YOUR SHARES AS SET FORTH IN THE TABLE.
[End Sidebar]

         - Current or retired directors, officers and employees of Morgan
           Stanley Dean Witter & Co. and any of its subsidiaries, such persons'
           spouses and children under the age of 21, and trust accounts for
           which any of such persons is a beneficiary.

         CLASS B SHARES  Class B shares are offered at net asset value with no
         initial sales charge but are subject to a contingent deferred sales
         charge, or CDSC, as set forth in the table below. For the purpose of
         calculating the CDSC, shares are deemed to have been purchased on the
         last day of the month during which they were purchased.

<TABLE>
<CAPTION>
                                                        CDSC AS A PERCENTAGE
YEAR SINCE PURCHASE PAYMENT MADE                         OF AMOUNT REDEEMED
<S>                                                     <C>
- ----------------------------------------------------------------------------
 First                                                          5.0%
- ----------------------------------------------------------------------------
 Second                                                         4.0%
- ----------------------------------------------------------------------------
 Third                                                          3.0%
- ----------------------------------------------------------------------------
 Fourth                                                         2.0%
- ----------------------------------------------------------------------------
 Fifth                                                          2.0%
- ----------------------------------------------------------------------------
 Sixth                                                          1.0%
- ----------------------------------------------------------------------------
 Seventh and thereafter                                         None
- ----------------------------------------------------------------------------
</TABLE>

           Each time you place an order to sell or exchange shares, shares with
           no CDSC will be sold or exchanged first, then shares with the lowest
           CDSC will be sold or exchanged next. For any shares subject to a
           CDSC, the CDSC will be assessed on an amount equal to the lesser of
           the current market value or the cost of the shares being sold.

           CDSC WAIVERS. A CDSC, if otherwise applicable, will be waived in the
           case of:

           - Sales of shares held at the time you die or become disabled (within
             the definition in Section 72(m)(7) of the Internal Revenue Code
             which relates to the ability to engage in gainful employment), if
             the shares are: (i) registered either in your name (not a trust) or
             in the names of you and your spouse as joint tenants with right of
             survivorship; or (ii) held in a qualified corporate or
             self-employed retirement plan, IRA or 403(b) Custodial Account,
             provided in either case that the sale is requested within one year
             of your death or initial determination of disability.

           - Sales in connection with the following retirement plan
             "distributions:" (i) lump-sum or other distributions from a
             qualified corporate or self-employed retirement plan following
             retirement (or, in the case of a "key employee" of a "top heavy"
             plan, following attainment of age 59 1/2); (ii) distributions from
             an IRA or 403(b) Custodial Account following attainment of age
             59 1/2; or (iii) a tax-free return of an excess IRA contribution (a
             "distribution" does not include a direct transfer of IRA, 403(b)
             Custodial Account or retirement plan assets to a successor
             custodian or trustee).

 18
<PAGE>
           - Sales of shares in connection with the Systematic Withdrawal Plan
             of up to 12% annually of the value of each Fund from which plan
             sales are made. The percentage is determined on the date you
             establish the Systematic Withdrawal Plan and based on the next
             calculated share price. You may have this CDSC waiver applied in
             amounts up to 1% per month, 3% per quarter, 6% semi-annually or 12%
             annually. Shares with no CDSC will be sold first, followed by those
             with the lowest CDSC. As such, the waiver benefit will be reduced
             by the amount of your shares that are not subject to a CDSC. If you
             suspend your participation in the plan, you may later resume plan
             payments without requiring a new determination of the account value
             for the 12% CDSC waiver.

           - Sales of shares if you simultaneously invest the proceeds in the
             Investment Manager's mutual fund asset allocation program, pursuant
             to which investors pay an asset-based fee. Any shares you acquire
             in connection with the Investment Manager's mutual fund asset
             allocation program are subject to all of the terms and conditions
             of that program, including termination fees, mandatory sale or
             transfer restrictions on terminations.

           All waivers will be granted only following the Fund's distributor
           receiving confirmation of your entitlement. If you believe you are
           eligible for a CDSC waiver, please contact your Financial Advisor or
           call (800) 869-NEWS.

           DISTRIBUTION FEE. Class B shares are also subject to an annual
           distribution (12b-1) fee of up to 0.75% of the lesser of: (a) the
           average daily aggregate gross purchases by all shareholders of the
           Fund's Class B shares since the inception of the Fund (not including
           reinvestment of dividends or capital gains distributions), less the
           average daily aggregate net asset value of the Fund's Class B shares
           sold by all shareholders since the Fund's inception upon which a CDSC
           has been imposed or waived, or (b) the average daily net assets of
           Class B.

           CONVERSION FEATURE. After ten (10) years, Class B shares will convert
           automatically to Class A shares of the Fund with no initial sales
           charge. The ten year period runs from the last day of the month in
           which the shares were purchased, or in the case of Class B shares
           acquired through an exchange, from the last day of the month in which
           the original Class B shares were purchased; the shares will convert
           to Class A shares based on their relative net asset values in the
           month following the ten year period. At the same time, an equal
           proportion of Class B shares acquired through automatically
           reinvested distributions will convert to Class A shares on the same
           basis. (Class B shares held before May 1, 1997, however, will convert
           to Class A shares in May 2007.)

           Currently, the Class B share conversion is not a taxable event; the
           conversion feature may be cancelled if it is deemed a taxable event
           in the future by the Internal Revenue Service.

           If you exchange your Class B shares for shares of a Money Market
           Fund, a No-Load Fund, North American Government Income Trust or
           Short-Term U.S. Treasury Trust, the holding period for conversion is
           frozen as of the last day of the month of the exchange and resumes on
           the last day of the month you exchange back into Class B shares.

                                                                              19
<PAGE>
           EXCHANGING SHARES SUBJECT TO A CDSC. There are special considerations
           when you exchange Fund shares that are subject to a CDSC. When
           determining the length of time you held the shares and the
           corresponding CDSC rate, any period (starting at the end of the
           month) during which you held shares of a fund that does NOT charge a
           CDSC WILL NOT BE COUNTED. Thus, in effect the "holding period" for
           purposes of calculating the CDSC is frozen upon exchanging into a
           fund that does not charge a CDSC.


           For example, if you held Class B shares of the Fund for one year,
           exchanged to Class B of another Morgan Stanley Dean Witter
           Multi-Class Fund for another year, then sold your shares, a CDSC rate
           of 4% would be imposed on the shares based on a two year holding
           period -- one year for each fund. However, if you had exchanged the
           shares of the Fund for a Money Market Fund (which does not charge a
           CDSC) instead of the Multi-Class Fund, then sold your shares, a CDSC
           rate of 5% would be imposed on the shares based on a one year holding
           period. The one year in the Money Market Fund would not be counted.
           Nevertheless, if shares subject to a CDSC are exchanged for a fund
           that does not charge a CDSC, you will receive a credit when you sell
           the shares equal to the distribution (12b-1) fees you paid on those
           shares while in that fund up to the amount of any applicable CDSC.



           In addition, shares that are exchanged into or from a Morgan Stanley
           Dean Witter Fund subject to a higher CDSC rate will be subject to the
           higher rate, even if the shares are re-exchanged into a fund with a
           lower CDSC rate.


           CLASS C SHARES Class C shares are sold at net asset value with no
           initial sales charge but are subject to a CDSC of 1.0% on sales made
           within one year after the last day of the month of purchase. The CDSC
           will be assessed in the same manner and with the same CDSC waivers as
           with Class B shares.

           DISTRIBUTION FEE. Class C shares are subject to an annual
           distribution (12b-1) fee of 0.75% of the average daily net assets of
           that Class. The Class C shares' distribution fee may cause that
           Class to have higher expenses and pay lower dividends than Class A or
           Class D shares. Unlike Class B shares, Class C shares have no
           conversion feature and, accordingly, an investor that purchases
           Class C shares may be subject to distribution (12b-1) fees applicable
           to Class C shares for an indefinite period.

           CLASS D SHARES Class D shares are offered without any sales charge on
           purchases or sales and without any distribution (12b-1) fee. Class D
           shares are offered only to investors meeting an initial investment
           minimum of $5 million and the following investor categories:

           - Investors participating in the Investment Manager's mutual fund
             asset allocation program (subject to all of its terms and
             conditions, including termination fees, mandatory sale or transfer
             restrictions on termination) pursuant to which they pay an
             asset-based fee.

 20
<PAGE>
           - Persons participating in a fee-based investment program (subject to
             all of its terms and conditions, including termination fees,
             mandatory sale or transfer restrictions on termination) approved by
             the Fund's distributor pursuant to which they pay an asset-based
             fee for investment advisory, administrative and/or brokerage
             services.

           - Certain unit investment trusts sponsored by Dean Witter Reynolds.

           - Certain other open-end investment companies whose shares are
             distributed by the Fund's distributor.

           - Investors who were shareholders of the Dean Witter Retirement
             Series on September 11, 1998 for additional purchases for their
             former Dean Witter Retirement Series accounts.

           MEETING CLASS D ELIGIBILITY MINIMUMS. To meet the $5 million initial
           investment to qualify to purchase Class D shares you may combine: (1)
           purchases in a single transaction of Class D shares of the Fund and
           other Morgan Stanley Dean Witter Multi-Class Funds and/or (2)
           previous purchases of Class A and Class D shares of Multi- Class
           Funds and shares of FSC Funds you currently own, along with shares of
           Morgan Stanley Dean Witter Funds you currently own that you acquired
           in exchange for those shares.

           NO SALES CHARGES FOR REINVESTED CASH DISTRIBUTIONS If you receive a
           cash payment representing an income dividend or capital gain and you
           reinvest that amount in the applicable Class of shares by returning
           the check within 30 days of the payment date, the purchased shares
           would not be subject to an initial sales charge or CDSC.

           PLAN OF DISTRIBUTION (RULE 12B-1 FEES) The Fund has adopted a Plan of
           Distribution in accordance with Rule 12b-1 under the Investment
           Company Act of 1940 with respect to the distribution of Class A,
           Class B and Class C shares. The Plan allows the Fund to pay
           distribution fees for the sale and distribution of these shares. It
           also allows the Fund to pay for services to shareholders of Class A,
           Class B and Class C shares. Because these fees are paid out of the
           Fund's assets on an ongoing basis, over time these fees will increase
           the cost of your investment in these Classes and may cost you more
           than paying other types of sales charges.

                                                                              21
<PAGE>
FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the Fund's
financial performance for the past 5 fiscal years of the Fund. Certain
information reflects financial results for a single Fund share. The total
returns in the table represent the rate an investor would have earned or lost on
an investment in the Fund (assuming reinvestment of all dividends and
distributions).

This information has been audited by PricewaterhouseCoopers LLP, independent
accountants, whose report, along with the Fund's financial statements, is
included in the annual report, which is available upon request.

<TABLE>
<CAPTION>
                                                              FOR THE YEAR ENDED DECEMBER 31,
                                                           --------------------------------------  FOR THE PERIOD JULY 28, 1997*
                                                                       1999                1998      THROUGH DECEMBER 31, 1997
<S>                                                        <C>                            <C>      <C>
- ---------------------------------------------------------------------------------------------------------------------------------

 CLASS A SHARES
- ---------------------------------------------------------------------------------------------------------------------------------

 SELECTED PER SHARE DATA:
- ---------------------------------------------------------------------------------------------------------------------------------
 Net asset value, beginning of period                                 $12.75              $12.89               $12.80
- ---------------------------------------------------------------------------------------------------------------------------------
 INCOME (LOSS) FROM INVESTMENT OPERATIONS:
    Net investment income                                               0.58                0.59                 0.27
    Net realized and unrealized gain (loss)                            (1.06)               0.10                 0.09
                                                                      ------              ------               ------
 Total income (loss) from investment operations                        (0.48)               0.69                 0.36
- ---------------------------------------------------------------------------------------------------------------------------------
 LESS DIVIDENDS AND DISTRIBUTIONS FROM:
    Net investment income                                              (0.58)              (0.59)               (0.27)
    Net realized gain                                                  (0.02)              (0.24)                  --
                                                                      ------              ------               ------
 Total dividends and distributions                                     (0.60)              (0.83)               (0.27)
- ---------------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                                       $11.67              $12.75               $12.89
- ---------------------------------------------------------------------------------------------------------------------------------

 TOTAL RETURN+                                                         (3.91)%              5.50%                2.82%(1)
- ---------------------------------------------------------------------------------------------------------------------------------

 RATIOS TO AVERAGE NET ASSETS:
- ---------------------------------------------------------------------------------------------------------------------------------
 Expenses                                                               0.78 %(3)(4)        0.83%(3)               0.78%(2)
- ---------------------------------------------------------------------------------------------------------------------------------
 Net investment income                                                  4.70 %(3)           4.58%(3)               4.47%(2)
- ---------------------------------------------------------------------------------------------------------------------------------

 SUPPLEMENTAL DATA:
- ---------------------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands                              $6,253              $3,788               $1,175
- ---------------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                                                   5 %                20%                  15%
- ---------------------------------------------------------------------------------------------------------------------------------
</TABLE>


*   The date shares were first issued.
+   Does not reflect the deduction of sales charge. Calculated based on the net
    asset value as of the last business day of the period.
(1) Not annualized.
(2) Annualized.
(3) Reflects overall Fund ratios for investment income and non-class specific
    expenses.
(4) Does not reflect the effect of expense offset of 0.01%.


 22
<PAGE>

<TABLE>
<CAPTION>
FOR THE YEAR ENDED DECEMBER 31,              1999                  1998              1997*             1996              1995
<S>                                       <C>                   <C>                <C>              <C>              <C>
- ---------------------------------------------------------------------------------------------------------------------------------
 CLASS B SHARES
- ---------------------------------------------------------------------------------------------------------------------------------

 SELECTED PER SHARE DATA:
- ---------------------------------------------------------------------------------------------------------------------------------
 Net asset value, beginning of period        $12.81                $12.92             $12.57           $12.92             $11.87
- ---------------------------------------------------------------------------------------------------------------------------------
 INCOME (LOSS) FROM INVESTMENT
OPERATIONS:
    Net investment income                      0.57                  0.58               0.57             0.58               0.61
    Net realized and unrealized gain
    (loss)                                    (1.06)                 0.13               0.35            (0.21)              1.13
                                           --------              --------           --------         --------         ----------
 Total income (loss) from investment
 operations                                   (0.49)                 0.71               0.92             0.37               1.74
- ---------------------------------------------------------------------------------------------------------------------------------
 LESS DIVIDENDS AND DISTRIBUTIONS FROM:
    Net investment income                     (0.57)                (0.58)             (0.57)           (0.58)             (0.61)
    Net realized gain                         (0.02)                (0.24)                --            (0.14)             (0.08)
 Total dividends and distributions            (0.59)                (0.82)             (0.57)           (0.72)             (0.69)
- ---------------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period              $11.73                $12.81             $12.92           $12.57             $12.92
- ---------------------------------------------------------------------------------------------------------------------------------

 TOTAL RETURN+                                (3.99)%                5.63%              7.51%            3.13%             14.96%
- ---------------------------------------------------------------------------------------------------------------------------------

 RATIOS TO AVERAGE NET ASSETS:
- ---------------------------------------------------------------------------------------------------------------------------------
 Expenses                                      0.91 %(1)(2)(3)       0.95%(2)(3)        1.33%            1.32%(1)           1.33%
- ---------------------------------------------------------------------------------------------------------------------------------
 Net investment income                         4.57%(2)(3)           4.46%(2)(3)        4.51%            4.66%              4.90%
- ---------------------------------------------------------------------------------------------------------------------------------

 SUPPLEMENTAL DATA:
- ---------------------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands   $761,548              $896,685           $914,474         $975,702         $1,054,881
- ---------------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                          5 %                  20%                15%              11%                23%
- ---------------------------------------------------------------------------------------------------------------------------------
</TABLE>

*   Prior to July 28, 1997, the Fund issued one class of shares. All shares of
    the Fund held prior to that date have been designated Class B shares.
+   Does not reflect the deduction of sales charge. Calculated based on the net
    asset value as of the last business day of the period.
(1) Does not reflect the effect of expense offset of 0.01%.
(2) Reflects overall Fund ratios for investment income and non-class specific
    expenses.
(3) If the Distributor had not rebated a portion of its fees to the Fund, the
    expense and net investment income ratios would have been 1.34% and 4.14%,
    respectively, for the year ended December 31, 1999 and 1.33% and 4.08%,
    respectively, for the year ended December 31, 1998.

                                                                              23
<PAGE>

<TABLE>
<CAPTION>
                                                                                                  FOR THE PERIOD
                                                       FOR THE YEAR ENDED DECEMBER 31,            JULY 28, 1997*
                                                    --------------------------------------           THROUGH
                                                                1999                1998        DECEMBER 31, 1997
<S>                                                 <C>                            <C>          <C>
- ------------------------------------------------------------------------------------------------------------------

 CLASS C SHARES
- ------------------------------------------------------------------------------------------------------------------

 SELECTED PER SHARE DATA:
- ------------------------------------------------------------------------------------------------------------------
 Net asset value, beginning of period                          $12.81              $12.92             $12.80
- ------------------------------------------------------------------------------------------------------------------
 INCOME (LOSS) FROM INVESTMENT OPERATIONS:
    Net investment income                                        0.51                0.53               0.23
    Net realized and unrealized gain (loss)                     (1.06)               0.13               0.12
                                                               ------              ------             ------
 Total income (loss) from investment operations                 (0.55)               0.66               0.35
- ------------------------------------------------------------------------------------------------------------------
 LESS DIVIDENDS AND DISTRIBUTIONS FROM:
    Net investment income                                       (0.51)              (0.53)             (0.23)
    Net realized gain                                           (0.02)              (0.24)                --
                                                               ------              ------             ------
 Total dividends and distributions                              (0.53)              (0.77)             (0.23)
- ------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                                $11.73              $12.81             $12.92
- ------------------------------------------------------------------------------------------------------------------

 Total Return+                                                  (4.41)%              5.22%              2.80%(1)
- ------------------------------------------------------------------------------------------------------------------

 RATIOS TO AVERAGE NET ASSETS:
- ------------------------------------------------------------------------------------------------------------------
 Expenses                                                        1.34 %(3)(4)        1.33%(3)           1.31%(2)
- ------------------------------------------------------------------------------------------------------------------
 Net investment income                                           4.14 %(3)           4.08%(3)           4.24%(2)
- ------------------------------------------------------------------------------------------------------------------

 SUPPLEMENTAL DATA:
- ------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands                      $13,099              $9,849             $3,610
- ------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                                            5 %                20%                15%
- ------------------------------------------------------------------------------------------------------------------
</TABLE>

*   The date shares were first issued.
+   Does not reflect the deduction of sales charge. Calculated based on the net
    asset value as of the last business day of the period.
(1) Not annualized.
(2) Annualized.
(3) Reflects overall Fund ratios for investment income and non-class specific
    expenses.
(4) Does not reflect the effect of expense offset of 0.01%.

 24
<PAGE>

<TABLE>
<CAPTION>
                                                                                                        FOR THE PERIOD
                                                                 FOR THE YEAR ENDED DECEMBER 31,        JULY 28, 1997*
                                                              --------------------------------------       THROUGH
                                                                          1999                1998    DECEMBER 31, 1997
<S>                                                           <C>                            <C>      <C>
- ------------------------------------------------------------------------------------------------------------------------

 CLASS D SHARES
- ------------------------------------------------------------------------------------------------------------------------

 SELECTED PER SHARE DATA:
- ------------------------------------------------------------------------------------------------------------------------
 Net asset value, beginning of period                                    $12.78              $12.92         $12.80
- ------------------------------------------------------------------------------------------------------------------------
 INCOME (LOSS) FROM INVESTMENT OPERATIONS:
    Net investment income                                                  0.60                0.63           0.28
    Net realized and unrealized gain (loss)                               (1.05)               0.10           0.12
                                                                         ------              ------         ------
 Total income (loss) from investment operations                           (0.45)               0.73           0.40
- ------------------------------------------------------------------------------------------------------------------------
 LESS DIVIDENDS AND DISTRIBUTIONS FROM:
    Net investment income                                                 (0.60)              (0.63)         (0.28)
    Net realized gain                                                     (0.02)              (0.24)            --
                                                                         ------              ------         ------
 Total dividends and distributions                                        (0.62)              (0.87)         (0.28)
- ------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                                          $11.71              $12.78         $12.92
- ------------------------------------------------------------------------------------------------------------------------

 Total Return+                                                            (3.63)%              5.77%          3.18%(1)
- ------------------------------------------------------------------------------------------------------------------------

 RATIOS TO AVERAGE NET ASSETS:
- ------------------------------------------------------------------------------------------------------------------------
 Expenses                                                                  0.59 %(3)(4)        0.58%(3)         0.60%(2)
- ------------------------------------------------------------------------------------------------------------------------
 Net investment income                                                     4.89 %(3)           4.83%(3)         5.34%(2)
- ------------------------------------------------------------------------------------------------------------------------

 SUPPLEMENTAL DATA:
- ------------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands                                 $1,021                $554            $45
- ------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                                                      5 %                20%            15%
- ------------------------------------------------------------------------------------------------------------------------
</TABLE>

*   The date shares were first issued.
+   Calculated based on the net asset value as of the last business day of the
    period.
(1) Not annualized.
(2) Annualized.
(3) Reflects overall Fund ratios for investment income and non-class specific
    expenses.
(4) Does not reflect the effect of expense offset of 0.01%.


                                                                              25
<PAGE>
NOTES

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 26
<PAGE>
NOTES

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                                                                              27
<PAGE>
NOTES

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 28
<PAGE>
MORGAN STANLEY DEAN WITTER
FAMILY OF FUNDS
The Morgan Stanley Dean Witter Family of Funds offers investors a wide range of
investment choices. Come on in and meet the family!
- --------------------------------------------------------------------------------
 GROWTH FUNDS
- ---------------------------------
GROWTH FUNDS
Aggressive Equity Fund
American Opportunities Fund
Capital Growth Securities
Developing Growth Securities
Growth Fund
Market Leader Trust
Mid-Cap Equity Trust
Next Generation Trust
SmallCap Growth Fund
Special Value Fund
21st Century Trend Fund

THEME FUNDS
Financial Services Trust
Health Sciences Trust
Information Fund
Natural Resource Development Securities

GLOBAL/INTERNATIONAL FUNDS
Competitive Edge Fund - "Best Ideas"
 Portfolio
European Growth Fund
Fund of Funds - International Portfolio
International Fund
International SmallCap Fund
Japan Fund
Latin American Growth Fund
Pacific Growth Fund

 GROWTH & INCOME FUNDS

Balanced Growth Fund
Balanced Income Fund
Convertible Securities Trust
Dividend Growth Securities
Equity Fund
Fund of Funds - Domestic Portfolio
Income Builder Fund
Mid-Cap Dividend Growth Securities
S&P 500 Index Fund
S&P 500 Select Fund
Strategist Fund
Total Market Index Fund
Total Return Trust
Value Fund
Value-Added Market Series/Equity Portfolio

THEME FUNDS
Real Estate Fund
Utilities Fund

GLOBAL FUNDS
Global Dividend Growth Securities
Global Utilities Fund

 INCOME FUNDS

GOVERNMENT INCOME FUNDS
Federal Securities Trust
Short-Term U.S. Treasury Trust
U.S. Government Securities Trust

DIVERSIFIED INCOME FUNDS
Diversified Income Trust

CORPORATE INCOME FUNDS
High Yield Securities
Intermediate Income Securities
Short-Term Bond Fund (NL)

GLOBAL INCOME FUNDS
North American Government Income Trust
World Wide Income Trust

TAX-FREE INCOME FUNDS
California Tax-Free Income Fund
Hawaii Municipal Trust (FSC)
Limited Term Municipal Trust (NL)
Multi-State Municipal Series Trust (FSC)
New York Tax-Free Income Fund
Tax-Exempt Securities Trust


 MONEY MARKET FUNDS

TAXABLE MONEY MARKET FUNDS
Liquid Asset Fund (MM)
U.S. Government Money Market Trust (MM)
TAX-FREE MONEY MARKET FUNDS
California Tax-Free Daily Income Trust (MM)
N.Y. Municipal Money Market Trust (MM)
Tax-Free Daily Income Trust (MM)

There may be funds created after this PROSPECTUS was published. Please consult
the inside back cover of a new fund's prospectus for its designation, e.g.,
Multi-Class Fund or Money Market Fund.

Unless otherwise noted, each listed Morgan Stanley Dean Witter Fund, except for
North American Government Income Trust and Short-Term U.S. Treasury Trust, is a
Multi-Class Fund. A mutual fund offering multiple Classes of shares. The other
types of funds are: NL - No-Load (Mutual) Fund; MM - Money Market Fund; FSC - A
mutual fund sold with a front-end sales charge and a distribution (12b-1) fee.
<PAGE>
                                                  PROSPECTUS - FEBRUARY 22, 2000

Additional information about the Fund's investments is available in the Fund's
ANNUAL AND SEMI-ANNUAL REPORTS TO SHAREHOLDERS. In the Fund's ANNUAL REPORT, you
will find a discussion of the market conditions and investment strategies that
significantly affected the Fund's performance during its last fiscal year. The
Fund's Statement of Additional Information also provides additional information
about the Fund. The Statement of Additional Information is incorporated herein
by reference (legally is part of this PROSPECTUS). For a free copy of any of
these documents, to request other information about the Fund, or to make
shareholder inquiries, please call:

                                 (800) 869-NEWS

You also may obtain information about the Fund by calling your Morgan Stanley
Dean Witter Financial Advisor or by visiting our Internet site at:

                         www.msdw.com/individual/funds

Information about the Fund (including the
STATEMENT OF ADDITIONAL INFORMATION) can be
viewed and copied at the Securities and Exchange
Commission's Public Reference Room in
Washington, DC. Information about the
Reference Room's operations may be obtained
by calling the SEC at (202) 942-8090. Reports
and other information about the Fund are
available on the EDGAR Database on the SEC's
Internet site (www.sec.gov), and copies of this
information may be obtained, after paying a
duplicating fee, by electronic request at the
following E-mail address: [email protected],
or by writing the Public Reference Section
of the SEC, Washington, DC 20549-0102.
 TICKER SYMBOLS:

<TABLE>
<S>                         <C>
   CLASS A:   CLFAX            CLASS C:   CLFCX
- ---------------------       ---------------------

   CLASS B:   CLFBX            CLASS D:   CLFDX
- ---------------------       ---------------------
</TABLE>

(THE FUND'S INVESTMENT COMPANY ACT FILE NO. IS 811- 4020)

Morgan Stanley Dean Witter
                                                             CALIFORNIA TAX-FREE
                                                                     INCOME FUND

                               [BACK COVER PHOTO]
                                                        A MUTUAL FUND THAT SEEKS
                                                      TO PROVIDE A HIGH LEVEL OF
                                                      CURRENT INCOME EXEMPT FROM
                                                     BOTH FEDERAL AND CALIFORNIA
                                                     INCOME TAX, CONSISTENT WITH
                                                     THE PRESERVATION OF CAPITAL

<PAGE>


         MORGAN STANLEY DEAN WITTER MULTI-STATE MUNICIPAL SERIES TRUST
                               CALIFORNIA SERIES


                   PROXY FOR SPECIAL MEETING OF SHAREHOLDERS


                            TO BE HELD JUNE 22, 2000

     The undersigned shareholder of California Series ("California Series"), a
portfolio of Morgan Stanley Dean Witter Multi-State Municipal Series Trust,
does hereby appoint Barry Fink, Ronald E. Robison and Joseph J. McAlinden and
each of them, as attorneys-in-fact and proxies of the undersigned, each with
the full power of substitution, to attend the Special Meeting of Shareholders
of California Series to be held on June 22, 2000, in Conference Room A,
Forty-Fourth Floor, Two World Trade Center, New York, New York at 10:00 A.M.,
New York time, and at all adjournments thereof and to vote the shares held in
the name of the undersigned on the record date for said meeting for the
Proposal specified on the reverse side hereof. Said attorneys-in-fact shall
vote in accordance with their best judgment as to any other matter.





                          (Continued on reverse side)

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES. THIS PROXY WHEN
PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN BY THE
UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS MADE, THIS PROXY WILL BE VOTED
"FOR" THE PROPOSAL SET FORTH ON THE REVERSE HEREOF AND AS RECOMMENDED BY THE
BOARD OF TRUSTEES.

      IMPORTANT--THIS PROXY MUST BE SIGNED AND DATED ON THE REVERSE SIDE.

<PAGE>

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


PLEASE MARK VOTES AS IN THE EXAMPLE USING BLACK OR BLUE INK [X]

TO VOTE BY MAIL, PLEASE COMPLETE AND RETURN THIS CARD
YOU ALSO MAY VOTE A PROXY BY TOUCH-TONE PHONE OR BY INTERNET
(SEE ENCLOSED VOTING INFORMATION CARD FOR FURTHER INSTRUCTIONS)

TO VOTE A PROXY BY PHONE, call Toll-Free: 1-800-690-6903

TO VOTE A PROXY BY INTERNET, visit our Website(s): WWW/MSDWT.COM or
WWW.PROXYVOTE.COM

The Proposal:                                     FOR      AGAINST     ABSTAIN

Approval of the Agreement and Plan of             [ ]        [ ]         [ ]
Reorganization, dated as of January 26, 2000, pursuant to which substantially
all of the assets of California Series would be combined with those of Morgan
Stanley Dean Witter California Tax-Free Income Fund and shareholders of
California Series would become shareholders of Morgan Stanley Dean Witter
California Tax-Free Income Fund receiving Class D shares in Morgan Stanley Dean
Witter California Tax-Free Income Fund with a value equal to the value of their
holdings in California Series.


Please sign personally. If the shares are registered in more than one name,
each joint owner or each fiduciary should sign personally. Only authorized
officers should sign for corporations.

Please make sure to sign and date this Proxy using black or blue ink.


Date
    -----------------------------------------

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

- ----------------------------------------------------
       Shareholder sign in the box above

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

- ----------------------------------------------------
     Co-Owner (if any) sign in the box above

- --------------------------------------------------------------------------------
            PLEASE FOLD AND DETACH AT PERFORATION ALONG DOTTED LINES


         MORGAN STANLEY DEAN WITTER MULTI-STATE MUNICIPAL SERIES TRUST
                               CALIFORNIA SERIES



- --------------------------------------------------------------------------------
                                   IMPORTANT

               USE ONE OF THE THREE EASY WAYS TO VOTE YOUR PROXY

 1. BY MAIL. PLEASE DATE, SIGN AND RETURN THE ABOVE PROXY CARD IN THE ENCLOSED
    POSTAGE PAID ENVELOPE.

 2. BY INTERNET. HAVE YOUR PROXY CARD AT HAND. GO TO THE "VOTE YOUR PROXY HERE"
    LINK ON THE WEBSITE WWW.MSDWT.COM OR WWW.PROXYVOTE.COM. ENTER YOUR 12
    DIGIT CONTROL NUMBER LOCATED ON THE PROXY CARD AND FOLLOW THE SIMPLE
    INSTRUCTIONS.

 3. BY TELEPHONE. HAVE YOUR PROXY CARD AT HAND. CALL 1-800-690-6903 ON A
    TOUCH-TONE PHONE. ENTER YOUR 12-DIGIT CONTROL NUMBER LOCATED ON THE PROXY
    CARD AND FOLLOW THE SIMPLE RECORDED INSTRUCTIONS.
- --------------------------------------------------------------------------------

<PAGE>
- -------------------------------------------------------------------------------

MORGAN STANLEY DEAN WITTER FUNDS
- -------------------------------------------------------------------------------

     OFFERS TWO NEW WAYS TO VOTE YOUR PROXY
     24 HOURS A DAY, 7 DAYS A WEEK

     You can now vote your proxy in a matter of minutes with the ease and
     convenience of the Internet or the telephone. You may still vote by mail.
     But remember, if you are voting by Internet or telephone, do not mail the
     proxy.

     TO VOTE BY INTERNET:

     1. Read the enclosed Proxy Statement and have your Proxy Card available.
     2. Go to the "Proxy Voting" link on www.msdwt.com or to website
        www.proxyvote.com.
     3. Enter the 12-digit Control Number found on your Proxy Card.
     4. Follow the simple instructions.

     TO VOTE BY TELEPHONE:

     1. Read the enclosed Proxy Statement and have your Proxy Card available.
     2. Call toll-free 1-800-690-6903.
     3. Enter the 12-digit Control Number found on your Proxy Card.
     4. Follow the simple recorded instructions.

                                                  Your Proxy Vote is Important!
                                           Thank You for Submitting Your Proxy.

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





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