TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST, 485APOS, 1999-04-26

TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST
485APOS, 1999-04-26

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<PAGE>

AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON APRIL 26, 1999
REGISTRATION NOS.: 33-46049
811-6572
================================================================================
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

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

FORM N-1A
REGISTRATION STATEMENT [X]
UNDER THE SECURITIES ACT OF 1933 [ ]
PRE-EFFECTIVE AMENDMENT NO. [X]
POST-EFFECTIVE AMENDMENT NO. 8
AND/OR
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY [ ]
ACT OF 1940 [X]
AMENDMENT NO. 9

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

TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST
(A MASSACHUSETTS BUSINESS TRUST)
(EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)

TWO WORLD TRADE CENTER
NEW YORK, NEW YORK 10048
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)

REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (212) 392-1600

BARRY FINK, ESQ.
TWO WORLD TRADE CENTER
NEW YORK, NEW YORK 10048
(NAME AND ADDRESS OF AGENT FOR SERVICE)

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

COPY TO:

DAVID M. BUTOWSKY, ESQ.
GORDON ALTMAN BUTOWSKY
WEITZEN SHALOV & WEIN
114 WEST 47TH STREET
NEW YORK, NEW YORK 10036

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

APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:

As soon as practicable after this Post-Effective Amendment becomes effective.

IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)

[ ] immediately upon filing pursuant to paragraph (b)

[ ] on March 29, 1999 pursuant to paragraph (b)

[ ] 60 days after filing pursuant to paragraph (a)

[X] on June 25, 1999 pursuant to paragraph (a) of rule 485.

AMENDING THE PROSPECTUS
================================================================================

<PAGE>

TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST

CROSS-REFERENCE SHEET

FORM N-1A

ITEM CAPTION
---- -------

PART A PROSPECTUS

1. .......... Cover Page; Back Cover
2. .......... Investment Objective; Principal Investment
Strategies, Principal Risks, Past Performance
3. .......... Fees and Expenses
4. .......... Investment Objective; Additional Investment
Strategy Information; Additional Risk Information
5. .......... Not Applicable
6. .......... Fund Management
7. .......... Pricing Fund Shares; Buying and Selling Shares; How to
Exchange Shares; How to Sell Shares; Distributions;
Tax Consequences
8. .......... Share Class Arrangments
9. .......... Financial Highlights

PART B STATEMENT OF ADDITIONAL INFORMATION

Information required to be included in Part B is set forth under the
appropriate caption in Part B of this Registration Statement.

PART C

Information required to be included in Part C is set forth under the
appropriate item, so numbered, in Part C of this Registration Statement.

<PAGE>

PROSPECTUS - JUNE 25, 1999

MORGAN STANLEY DEAN WITTER

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

NORTH AMERICAN GOVERNMENT INCOME TRUST

A MUTUAL FUND THAT SEEKS TO EARN A HIGH LEVEL OF CURRENT
INCOME WHILE MAINTAINING RELATIVELY LOW VOLATILITY OF
PRINCIPAL

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

The Fund Investment Objective ..............................1

Principal Investment Strategies ...................1

Principal Risks ...................................1

Past Performance ..................................3

Fees and Expenses .................................4

Additional Investment Strategy Information ........4

Additional Risk Information .......................5

Fund Management ...................................8

Shareholder Information Pricing Fund Shares ...............................9

How to Buy Shares .................................9

How to Exchange Shares ...........................10

How to Sell Shares ...............................13

Distributions ....................................14

Tax Consequences .................................14

Financial Highlights ..................................................16

This Prospectus contains important information about
the Fund. Please read it carefully and keep it for
future reference.

FUND CATEGORY
-------------
[ ] Growth
[ ] Growth and Income
[X] INCOME
[ ] Money Market

<PAGE>

THE FUND

INVESTMENT OBJECTIVE
- --------------------

Morgan Stanley Dean Witter North American Government Income Trust is a mutual
fund that seeks to earn a high level of current income while maintaining
relatively low volatility of principal. There is no guarantee that the Fund
will achieve this objective.

PRINCIPAL INVESTMENT STRATEGIES
- -------------------------------

(sidebar)
INCOME
An investment objective having the goal of selecting securities to pay out
income rather than rise in value.
(end sidebar)

The Fund will normally invest at least 65% of its assets in investment grade
fixed-income securities issued or guaranteed by the United States, Canadian or
Mexican governments, their agencies or instrumentalities. These securities are
referred to generally as "government securities." In the case of the United
States and Canada, a substantial portion of these securities will be
mortgage-backed securities. The Fund will normally invest at least fifty
percent of its assets in U.S. government securities, and no more than
twenty-five percent each in Canadian or Mexican government securities.

The Fund's "Sub-Advisor," TCW Funds Management, Inc., will allocate Fund assets
among the three countries based on its analysis of market, economic and
political conditions in those countries. The Sub-Advisor will consider various
factors, such as changes in interest rates and currency exchange rates, to
attempt to take advantage of favorable investment opportunities in each
country. The Sub-Advisor expects that, under normal circumstances, the weighted
average maturity of the Fund's investment securities will be no greater than 3
years.

MORTGAGE-BACKED SECURITIES. One type of mortgage-backed security, in which the
Fund may invest, is a mortgage pass-through security. These securities
represent a participation interest in a pool of residential mortgage loans
originated by governmental or private lenders such as banks. They differ from
conventional debt securities, which provide for periodic payment of interest in
fixed amounts and principal payments at maturity or on specified call dates.
Mortgage pass-through securities provide for monthly payments that are a
"pass-through" of the monthly interest and principal payments made by the
individual borrowers on the pooled mortgage loans.

OTHER SECURITIES. The Fund may invest up to 35% of its assets in securities
that are not government securities. This group of securities also will be
issued by U.S., Canadian or Mexican issuers and may include corporate debt
securities and securities backed by other assets, such as automobile or credit
card receivables or home equity loans. They are rated at least Aa by Moody's
Investors Services or AA by Standard & Poor's or, if not rated, determined to
be of comparable quality by the Sub-Advisor.

PRINCIPAL RISKS
- ---------------

The Fund's share price 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.

FIXED-INCOME SECURITIES. The Fund's investments in fixed-income securities are
subject to two types of risk: credit risk and interest rate risk.

1
<PAGE>

FOREIGN SECURITIES. The Fund is subject to the risks associated with foreign
securities generally. These risks include, among other things, the possibility
that the Fund could be adversely affected by changes in currency exchange
rates.

MORTGAGE-BACKED SECURITIES. There are particular risks associated with the
Fund's investment in mortgage-backed securities. For example, these securities
are subject to prepayment risks and in some cases may be more volatile and less
liquid than other traditional types of debt securities.

CANADIAN AND MEXICAN SECURITIES. The Canadian debt securities market is
significantly smaller than the U.S. debt securities market. In particular, the
Canadian mortgage-backed securities market is of recent origin, and, although
continued growth is anticipated, is less well developed and less liquid than
its U.S. counterpart.

Because the Fund intends to invest in Mexican debt instruments, investors in
the Fund should be aware of certain special considerations associated with
investing in debt obligations of the Mexican government.

The Mexican government has exercised and continues to exercise a significant
influence over many aspects of the private sector in Mexico. Mexican government
actions concerning the economy could have a significant effect on market
conditions and prices and yields of Mexican debt obligations, including those
in which the Fund invests. Mexico is currently a major debtor nation (among
developing countries) to commercial banks and foreign governments.

The value of the Fund's investments may be affected by changes in oil prices,
interest rates, taxation and other political or economic developments in
Mexico, including recent rates of inflation which have exceeded the rates of
inflation in the U.S. and Canada. The Fund can provide no assurance that future
developments in the Mexican economy will not impair the Fund's investment
flexibility, operations or ability to achieve its investment objective.

OTHER RISKS. The performance of the Fund also will depend on whether the
Sub-Advisor is successful in pursuing the Fund's investment strategy. In
addition, the Fund is subject to other risks from its permissible investments.
For information about these risks, as well as more detailed information about
the risks summarized in this section, see the "Additional Risk Information"
section.

2
<PAGE>

PAST PERFORMANCE
- ----------------

The bar chart and table below provide some indication of the Fund's performance
history. The Fund's past performance does not indicate how the Fund will
perform in the future.

(sidebar)
ANNUAL TOTAL RETURNS
This chart shows how the performance of the Fund's shares has varied from year
to year for the past six calendar years.
(end sidebar)

ANNUAL TOTAL RETURNS -- CALENDAR YEARS

1993 '94 '95 '96 '97 '98
---- --- --- --- --- ---

(sidebar)
AVERAGE ANNUAL TOTAL RETURNS
This table compares the Fund's average annual returns with those of a broad
measure of market performance over time.
(end sidebar)

During the periods shown in the bar chart, the highest return for a calendar
quarter was % (quarter ended ) and the lowest return for a calendar
quarter was % (quarter ended ). Year-to-date total return as of
March 31, 1999 was %.

AVERAGE ANNUAL TOTAL RETURNS (FOR THE PERIODS ENDED THE 1998 CALENDAR YEAR)

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------
LIFE OF
PORTFOLIO
PAST 1 YEAR (SINCE 7/31/92)
- ------------------------------------------------------------------------------------------
<S> <C> <C>
North American Government Securities Trust --% --%
- ------------------------------------------------------------------------------------------
Lehman Brothers Short (1-5) U.S. Government Index(1) --% --%
- ------------------------------------------------------------------------------------------
Lipper Variable Annuity Global Income Underlying
- ------------------------------------------------------------------------------------------
Funds Average(2) --% --%%
- ------------------------------------------------------------------------------------------
</TABLE>

(1) The Lehman Brothers Short (1-5) U.S. Government Index measures the
performance of all U.S. Government agency and U.S. Treasury securities
with maturities of one to five years. The Index does not include any
expenses, fees or charges. The Index is unmanaged and should not be
considered an investment.

(2) The Lipper Variable Annuity Global Income Underlying Funds Average tracks
the performance of funds that state in their prospectus that they invest
primarily in U.S. dollar and non-U.S. dollar debt securities of issuers
located in at least three countries, one of which may be the United
States, as reported by Lipper Analytical Service.

3
<PAGE>

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 does not impose any sales charges and
does not charge account or exchange fees.

(sidebar)
ANNUAL FUND OPERATING EXPENSES
These expenses are deducted from the Fund's assets and are based on expenses
paid for the fiscal year ended October 31, 1998.
(end sidebar)

ANNUAL FUND OPERATING EXPENSES
- ------------------------------------------------
Management fee 0.65%
- ------------------------------------------------
Distribution and service (12b-1) fees 0.73%
- ------------------------------------------------
Other expenses 0.31%
- ------------------------------------------------
Total annual Fund operating expenses 1.69%
- ------------------------------------------------

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 shows your
costs at the end of each period based on these assumptions

1 YEAR 3 YEARS 5 YEARS 10 YEARS
- ------------------------------------------------
$ $ $ $
- ------------------------------------------------

ADDITIONAL INVESTMENT STRATEGY INFORMATION
- ------------------------------------------

The Fund seeks to earn a high level of current income while maintaining
relatively low volatility of principal. There is no guarantee that the Fund
will achieve this objective.

This section provides additional information concerning the Fund's principal
investment strategies.

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 cash or money market instruments in a defensive posture
when the Sub-Advisor believes it is advisable to do so. Although taking a
defensive posture is designed to protect the Fund from an anticipated market
downturn, it could have the effect of reducing the benefit from any upswing in
the market or otherwise affect the Fund's ability to meet its investment
objective.

The percentage limitations relating to the composition of the Fund's portfolio
referenced in "Principal Investment Strategies" apply at the time the Fund
acquires an investment. Subsequent percentage changes that result from market
fluctuations or changes in assets 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.

4
<PAGE>

ADDITIONAL RISK INFORMATION
- ---------------------------

This section provides additional information regarding the principal risks of
investing in the Fund.

FIXED-INCOME SECURITIES. All fixed-income securities are subject to two types
of risk: credit risk and interest rate risk. Credit risk refers to the
possibility that the issuer of a security will be unable to make interest
payments and/or repay the principal on its debt.

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. (Zero coupon securities are
typically subject to greater price fluctuations than comparable securities that
pay interest.) Accordingly, a rise in the general level of interest rates may
cause the price of the Fund's fixed-income securities to fall substantially. As
merely illustrative of the relationship between fixed-income securities and
interest rates, the following table shows how interest rates affect bond
prices.

<TABLE>
<CAPTION>
HOW INTEREST RATES AFFECT BOND PRICES
- --------------------------------------------------------------------------
PRICE PER $1,000 OF A BOND IF INTEREST RATES:
---------------------------------------------
INCREASE DECREASE
---------------------------------------------
BOND MATURITY COUPON 1% 2% 1% 2%
- --------------------------------------------------------------------------
<S> <C> <C> <C> <C> <C>
1 YEAR N/A $1,000 $1,000 $1,000 $1,000
- --------------------------------------------------------------------------
5 years 4.25% $967 $934 $1,038 $1,076
- --------------------------------------------------------------------------
10 years 4.75% $930 $867 $1,074 $1,155
- --------------------------------------------------------------------------
30 years 5.25% $865 $756 $1,166 $1,376
- --------------------------------------------------------------------------
</TABLE>

Coupons reflect yields on Treasury securities as of December 31, 1998. The
table is not representative of price changes for mortgage-backed securities
principally because of prepayments, and it is not representative of junk bonds.
In addition, the table is an illustration and does not represent expected
yields or share price changes of any Morgan Stanley Dean Witter mutual fund.

MORTGAGE-BACKED SECURITIES. Mortgage-backed securities have different risk
characteristics than traditional debt securities. Although generally the value
of fixed-income securities increases during periods of falling interest rates
and decreases during periods of rising interest rates, this is not always the
case with mortgage-backed securities. This is due to the fact that principal on
underlying mortgages may be prepaid at any time as well as other factors.
Generally, prepayments will increase during a period of falling interest rates
and decrease during a period of rising interest rates. The rate of prepayments
also may be influenced by economic and other factors. Prepayment risk includes
the possibility that, as interest rates fall, securities with stated interest
rates may have the principal prepaid earlier than expected, requiring the Fund
to invest the proceeds at generally lower interest rates.

Investments in mortgage-backed securities are made based upon, among other
things, expectations regarding the rate of prepayments on underlying mortgage
pools. Rates of prepayment, faster or slower than expected by the Investment
Manager or Sub-Advisor, could reduce the Fund's yield, increase the volatility
of the Fund and/or cause a

5
<PAGE>

decline in net asset value. Certain mortgage-backed securities in which the
Fund may invest may be more volatile and less liquid than other traditional
types of debt securities.

FOREIGN SECURITIES. Foreign securities (including depository receipts) involve
risks in addition to the risks associated with domestic securities. One
additional risk is currency risk. While the price of Fund shares is quoted in
U.S. dollars, the Fund generally converts U.S. dollars to a foreign market's
local currency to purchase a security in that market. If the value of that
local currency falls relative to the U.S. dollar, the U.S. dollar value of the
foreign security will decrease. This is true even if the foreign security's
local price remains unchanged.

Foreign securities also have risks related to economic and political
developments abroad, including effects of foreign social, economic or political
instability. Foreign companies, in general, are not subject to the regulatory
requirements of U.S. companies and, as such, there may be less publicly
available information about these companies. Moreover, foreign accounting,
auditing and financial reporting standards generally are different from those
applicable to U.S. companies. Finally, in the event of a default of any foreign
debt obligations, it may be more difficult for the Fund to obtain or enforce a
judgment against the issuers of the securities.

Securities of foreign issuers may be less liquid than comparable securities of
U.S. issuers and, as such, their price changes may be more volatile.
Furthermore, foreign exchanges and broker-dealers are generally subject to less
government and exchange scrutiny and regulation than their U.S. counterparts.

The Mexican securities in which the Fund may invest are issued by a developing
country. Compared to the United States and other developed countries,
developing countries may have relatively unstable governments, economies based
on only a few industries and securities markets that trade a small number of
securities. Prices of these securities tend to be especially volatile and, in
the past, securities in these countries have offered greater potential loss (as
well as gain) than securities of companies located in developed countries.

OPTIONS AND FUTURES. If the Fund invests in options and/or futures, its
participation in these markets would subject it to certain risks. The
Investment Manager's or Sub-Advisor's predictions of movements in the direction
of the stock, bond, currency or interest rate markets may be inaccurate, and
the adverse consequences to the Fund (e.g., a reduction in the Fund's net asset
value or a reduction in the amount of income available for distribution) may
leave the Fund in a worse position than if these strategies were not used.
Other risks inherent in the use of options and futures include, for example,
the possible imperfect correlation between the price of options and futures
contracts and movements in the prices of the securities being hedged, and the
possible absence of a liquid secondary market for any particular instrument.
Certain options may be over-the-counter options, which are options negotiated
with dealers; there is no secondary market for these investments.

FORWARD CURRENCY CONTRACTS. The Fund's participation in forward currency
contracts also involves risks. If the Investment Manager or Sub-Advisor employs
a strategy that does not correlate well with the Fund's investments or the
currencies in

6
<PAGE>

which the investments are denominated, currency contracts could result in a
loss. The contracts also may increase the Fund's volatility and may involve a
significant risk.

NON-DIVERSIFIED STATUS. The Fund is a "non-diversified" mutual fund and, as
such, its investments are not required to meet certain diversification
requirements under federal law. Compared with "diversified" funds, the Fund may
invest a greater percentage of its assets in the securities of an individual
governmental entity. Thus, the Fund's assets may be concentrated in fewer
securities than other funds. A decline in the value of those investments would
cause the Fund's overall value to decline to a greater degree.

YEAR 2000. The Fund could be adversely affected if the computer systems
necessary for the efficient operation of the Investment Manager, the
Sub-Advisor and the Fund's other service providers, as well as the markets and
individual and governmental issuers in which the Fund invests do not properly
process and calculate date-related information from and after January 1, 2000.
While year 2000-related computer problems could have a negative effect on the
Fund, the Investment Manager, Sub-Advisor and affiliates are working hard to
avoid any problems and to obtain assurances from their service providers that
they are taking similar steps.

In addition, it is possible that the markets for securities in which the Fund
invests may be detrimentally affected by computer failures throughout the
financial services industry beginning January 1, 2000. Improperly functioning
trading systems may result in settlement problems and liquidity issues. In
addition, corporate and governmental data processing errors may result in
production problems for individual companies and overall economic
uncertainties. Earnings of individual issuers will be affected by remediation
costs, which may be substantial and may be reported inconsistently in U.S. and
foreign financial statements. Accordingly, the Fund's investments may be
adversely affected.

7
<PAGE>

FUND MANAGEMENT
- ---------------

(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, has more than $ billion in assets under
management or administration as of May 31, 1999.
(end sidebar)

The Fund has retained the Investment Manager - Morgan Stanley Dean Witter
Advisors Inc. - to provide administrative services, manage its business affairs
and supervise the investment of its assets. The Investment Manager has, in turn,
contracted with the Sub-Advisor - TCW Funds Management, Inc. - to invest the
Funds assets, including the placing of orders for the purchase and sale of
portfolio securities. TCW Funds Management, Inc. has been the Sub-Advisor of
the Fund since June 25, 1999. Prior to that TCW Funds Management, Inc. acted as
the Fund's advisor and Morgan Stanley Dean Witter Services Company Inc. was the
Fund's manager. 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, New York 10048.

The Sub-Advisor is a wholly-owned subsidiary of TCW Group, Inc., whose direct
and indirect subsidiaries provide a variety of trust, investment management and
investment advisory services. The Sub-Advisor's main business office is located
at 865 South Figueroa Street, Suite 1800, Los Angeles, California 90017.

Philip A. Barach and Jeffrey E. Gundlach, Group Managing Directors of the
Sub-Advisor, and James M. Goldberg and Frederick H. Horton, Managing Directors
of the Sub-Advisor, are the Fund's primary portfolio managers, and, with the
exception of Mr. Horton, have been so since the Fund's inception. Mr. Horton
has been a primary portfolio manager since December, 1994. Messrs. Barach,
Gundlach, Goldberg and Horton have each been portfolio managers with affiliates
of the Sub-Advisor 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. The Investment Manager pays the Sub-Advisor monthly
compensation equal to 40% of this fee. For the fiscal year ended October 31,
1998 the Fund accrued aggregate total compensation to Morgan Stanley Dean
Witter Services Company Inc. (the Fund's former manager) and TCW Funds
Management, Inc. (at that time acting as the Fund's advisor, rather than
sub-advisor) of 0.65% of the Fund's average daily net assets (0.39% to Morgan
Stanley Dean Witter Services Company Inc. and 0.26% to TCW Funds Management,
Inc.).

8
<PAGE>

SHAREHOLDER INFORMATION

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. The net asset value
of each Class, however, 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 value of the Fund's portfolio securities is based on the securities' market
price when available. When a market price is not readily available, including
circumstances under which the Investment Manager and/or Sub-Advisor determines
that a security's market price is not accurate, a portfolio security is valued
at its fair value, as determined under procedures established by the Fund's
Board of Trustees. In these cases, the Fund's net asset value will reflect
certain portfolio securities' fair value rather than their market price.

An exception to the Fund's general policy of using market prices 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.

HOW TO BUY SHARES
- -----------------

(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 (800) THE-DEAN 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.deanwitter.com/funds
(end sidebar)

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.

When you buy Fund shares, the shares are purchased at the next share price
calculated after we receive your investment order as described below. We
reserve the right to reject any order for the purchase of Fund shares.

9
<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)

<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*
- ------------------------------------------------------------------------------
</TABLE>

* Provided your schedule of investments totals $1,000 in twelve months.

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.

THREE DAY SETTLEMENT. Fund shares are sold through the Fund's distributor,
Morgan Stanley Dean Witter Distributors Inc., on a normal three business day
basis; that is, your payment for Fund shares is due on the third business day
(settlement day) after you place a purchase order.

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:

o 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, and the investment amount (which would include any applicable
front-end sales charge). The letter must be signed by the account owner(s).

o Make out a check for the total amount payable to: Morgan Stanley Dean Witter
North American Government Income Trust.

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

PLAN OF DISTRIBUTION The Fund has adopted a Plan of Distribution in accordance
with Rule 12b-1 under the Investment Company Act of 1940. The Plan allows the
Fund to pay distribution fees of up to 0.75% for the sale and distribution of
these shares. It also allows the Fund to pay for services to shareholders.
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 and may cost you more
than paying other types of sales charges.

HOW TO EXCHANGE SHARES
- ----------------------

PERMISSIBLE FUND EXCHANGES. You may only exchange shares of the Fund for
shares of other continuously offered Morgan Stanley Dean Witter Funds if the
Fund shares were acquired in an exchange of shares initially purchased in a
Multi-Class Fund or an FSC Fund (subject to a front-end sales charge). In that
case, the shares may be

10
<PAGE>

subsequently re-exchanged for shares of the same Class of any Multi-Class Fund
or FSC Fund or for shares of a Money Market Fund, No-Load Fund or Short-Term
U.S. Treasury Trust. Of course, if an exchange is not permitted, you may sell
shares of the Fund and buy another Fund's shares with the proceeds.

See the inside back cover of this Prospectus for each Morgan Stanley Dean
Witter Fund's designation as a Multi-Class Fund, FSC 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 are treated as Class A shares of a
Multi-Class Fund.

The current Prospectus for each fund describes its investment objective(s),
policies and investment minimums, and should be read before investing.

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.
Certain services normally available to shareholders of Money Market Funds,
including the check writing privilege, are 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.

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.

11
<PAGE>

EXCHANGING SHARES OF ANOTHER FUND SUBJECT TO A CONTINGENT DEFERRED SALES CHARGE
("CDSC"). There are special considerations when you exchange shares subject to
a CDSC of another Morgan Stanley Dean Witter Fund for shares of the Fund. 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 the Fund will not be counted. Thus, in effect the "holding period"
for purposes of calculating the CDSC is frozen upon exchanging into the Fund.
Nevertheless, if shares subject to a CDSC are exchanged for shares of the Fund,
you will receive a credit when you sell the shares equal to the distribution
(12b-1) fees, if any, you paid on those shares while in the Fund up to the
amount of any applicable CDSC. See the Prospectus of the Fund that charges the
CDSC for more details.

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.

FREQUENT EXCHANGES. A pattern of frequent exchanges may result in the Fund
limiting or prohibiting, at its discretion, additional purchases and/or
exchanges. The Fund will notify you in advance of limiting your exchange
privileges.

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

12
<PAGE>

HOW TO SELL SHARES
- ------------------

You can sell some or all of your Fund shares at any time. Your shares will be
sold at the next price calculated after we receive your order to sell as
described below.

OPTIONS PROCEDURES
- --------------------------------------------------------------------------------
Contact Your To sell your shares, simply call your Morgan Stanley Dean
Financial Advisor Witter Financial Advisor or other authorized financial
representative.
------------------------------------------------------------
Payment will be sent to the address to which the account is
registered or deposited in your brokerage account.
- --------------------------------------------------------------------------------
By Letter You can also sell your shares by writing a "letter of
instruction" that includes:
o your account number;
o the dollar amount or the number of shares you wish to
sell; and
o 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 generally obtain a signature guarantee
from an eligible guarantor acceptable to Morgan Stanley Dean
Witter Trust FSB. (You should contact Morgan Stanley Dean
Witter Trust FSB at (800) 869-NEWS for 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, New Jersey 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
$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.
------------------------------------------------------------
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.
- --------------------------------------------------------------------------------

(sidebar)
SYSTEMATIC WITHDRAWAL PLAN
This plan allows you to withdraw money automatically from your Fund account at
regular intervals. Contact your Morgan Stanley Dean Witter Financial Advisor for
more details.
(end sidebar)

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, payment of the sale proceeds may be delayed for the minimum
time needed to verify that the check has been honored (not more than fifteen
days from the time we receive the check).

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)

13
<PAGE>

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.

MARGIN ACCOUNTS. Certain restrictions may apply to Fund shares pledged in
margin accounts with Dean Witter Reynolds or another authorized broker-dealer
of Fund shares. If you hold Fund shares in this manner, please contact your
Morgan Stanley Dean Witter Financial Advisor or other authorized financial
representative for more details. System

DISTRIBUTIONS
- -------------

(sidebar)
TARGETED DIVIDENDS(SM)
You may select to have your Fund distributions automatically invested in
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)

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 are
passed along as "capital gain distributions."

Normally, income dividends are distributed to shareholders monthly. Any capital
gains are distributed in December; if a second capital gain distribution is
necessary, it is paid in the following year. 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 Fund and
automatically credited to your account, unless you request in writing that all
distributions be paid in cash. If you elect the cash option, the Fund will mail
a check to you no later than seven business days after the distribution is
declared. 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.

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.

Unless your investment in the Fund is through a tax-deferred retirement
account, such as a 401(k) plan or IRA, you need to be aware of the possible tax
consequences when:

o The Fund makes distributions; and

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

14
<PAGE>

TAXES ON DISTRIBUTIONS. Your distributions are normally subject to federal and
state income tax when they are paid, whether you take them in cash or reinvest
them in Fund shares. A distribution also may be subject to local income tax.
Any income dividend distributions and any short-term capital gain distributions
are taxable to you as ordinary income. Any long-term capital gain distributions
are taxable as long-term capital gains, no matter how long you have owned
shares in the Fund.

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
full 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.

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.

15
<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 throughout each
year. 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 , whose report, along
with the Fund's financial statements, is included in the annual report, which
is available upon request.

CLASS B SHARES
-------------------------------------------------
[TO COME]

16
<PAGE>

NOTES

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

17
<PAGE>

NOTES

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

18
<PAGE>

NOTES

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

19
<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!

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------
<S> <C> <C>
GROWTH FUNDS GROWTH FUNDS Information Fund
Natural Resource Development Securities
Aggressive Equity Fund Precious Metals and Minerals Trust
American Opportunities Fund Real Estate Fund
Capital Growth Securities
Developing Growth Securities GLOBAL/INTERNATIONAL FUNDS
Equity Fund
Growth Fund Competitive Edge Fund - "Best Ideas" Portfolio
Market Leader Trust European Growth Fund
Mid-Cap Growth Fund Fund of Funds - International Portfolio
Special Value Fund Global Dividend Growth Securities
Value Fund International SmallCap Fund
Japan Fund
THEME FUNDS Pacific Growth Fund

Financial Services Trust
Health Sciences Trust
- ----------------------------------------------------------------------------------------------------------------
GROWTH & INCOME FUNDS Balanced Growth Fund S&P 500 Index Fund
Balanced Income Fund S&P 500 Select Fund
Convertible Securities Trust Strategist Fund
Dividend Growth Securities Value/Added Market Series/Equity Portfolio
Fund of Funds - Domestic Portfolio
Income Builder Fund THEME FUNDS
Mid-Cap Dividend Growth Securities
Global Utilities Fund
Utilities Fund
- ----------------------------------------------------------------------------------------------------------------
INCOME FUNDS GOVERNMENT INCOME FUNDS GLOBAL INCOME FUNDS

Federal Securities Trust World Wide Income Trust
Short-Term U.S. Treasury Trust
U.S. Government Securities Trust TAX-FREE INCOME FUNDS

DIVERSIFIED INCOME FUNDS California Tax-Free Income Fund
Hawaii Municipal Trust(FSC)
Diversified Income Trust Limited Term Municipal Trust(NL)
Multi-State Municipal Series Trust(FSC)
CORPORATE INCOME FUNDS New York Tax-Free Income Fund
Tax-Exempt Securities Trust
High Yield Securities
Intermediate Income Securities
Short-Term Bond Fund(NL)
- ----------------------------------------------------------------------------------------------------------------
MONEY MARKET FUNDS TAXABLE MONEY MARKET FUNDS TAX-FREE MONEY MARKET FUNDS

Liquid Asset Fund(MM) California Tax-Free Daily Income Trust(MM)
U.S. Government Money Market Trust(MM) New York Municipal Money Market Trust(MM)
Tax-Free Daily Income Trust(MM)
</TABLE>

There may be Funds created after this Prospectus was published. Please consult
the inside front cover of a new Fund's prospectus for its designations, e.g.,
Multi-Class Fund or Money Market Fund.

Unless otherwise noted, each listed Morgan Stanley Dean Witter Fund, except for
Short-Term U.S. Treasury Trust, is a Multi-Class Fund. A Multi-Class Fund is 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>

MORGAN STANLEY DEAN WITTER NORTH AMERICAN GOVERNMENT INCOME TRUST

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:

TICKER SYMBOLS:

Class A:
- ------------------
Class B:
- ------------------
Class C:
- ------------------
Class D:
- ------------------

WWW.DEANWITTER.COM/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 (800) SEC-0330. Reports and
other information about the Fund are available on the SEC's Internet site
(www.sec.gov) and copies of this information may be obtained, upon payment of a
duplicating fee, by writing the Public Reference Section of the SEC,
Washington, DC 20549-6009.

(INVESTMENT COMPANY ACT FILE NO. 811-6572)

<PAGE>

STATEMENT OF ADDITIONAL INFORMATION
MORGAN STANLEY
JUNE 25, 1999 DEAN WITTER
NORTH AMERICAN
GOVERNMENT
INCOME TRUST
- --------------------------------------------------------------------------------

This Statement of Additional Information is not a Prospectus. The
Prospectus (dated June 25, 1999) for Morgan Stanley Dean Witter North American
Government Income Trust may be obtained without charge from the Fund at its
address or telephone number listed below or from Dean Witter Reynolds at any of
its branch offices.

Morgan Stanley Dean Witter North American Government Income Trust
Two World Trade Center
New York, New York 10048
(800) 869-NEWS

<PAGE>

TABLE OF CONTENTS
- --------------------------------------------------------------------------------

I. Fund History .......................................................... 4
II. Description of the Fund and Its Investments and Risks ................. 4
A. Classification ..................................................... 4
B. Investment Strategies and Risks .................................... 4
C. Fund Policies/Investment Restrictions .............................. 13
III. Management of the Fund ................................................ 14
A. Board of Trustees .................................................. 14
B. Management Information ............................................. 14
C. Compensation ....................................................... 19
IV. Control Persons and Principal Holders of Securities ................... 21
V. Management, Investment Advice and Other Services ...................... 21
A. The Investment Manager and Sub-Advisor ............................. 21
B. Principal Underwriter .............................................. 22
C. Services Provided by the Investment Manager, the Sub-Advisor
and Fund Expenses Paid by Third Parties ............................ 23
D. Rule 12b-1 Plan .................................................... 24
E. Other Service Providers ............................................ 25
VI. Brokerage Allocation and Other Practices .............................. 26
A. Brokerage Transactions ............................................. 26
B. Commissions ........................................................ 26
C. Brokerage Selection ................................................ 26
D. Directed Brokerage ................................................. 27
E. Regular Broker-Dealers ............................................. 27
VII. Capital Stock and Other Securities .................................... 27
VIII. Purchase, Redemption and Pricing of Shares ............................ 28
A. Purchase/Redemption of Shares ...................................... 28
B. Offering Price ..................................................... 28
IX. Taxation of the Fund and Shareholders ................................. 29
X. Underwriters .......................................................... 30
XI. Calculation of Performance Data ....................................... 30
XII. Financial Statements .................................................. 31

2
<PAGE>

GLOSSARY OF SELECTED DEFINED TERMS

The terms defined in this glossary are frequently used in this Statement
of Additional Information (other terms used occasionally are defined in the
text of the document).

"Custodian " -- The Bank of New York.

"Dean Witter Reynolds " -- Dean Witter Reynolds Inc., a wholly-owned
broker-dealer subsidiary of MSDW.

"Distributor " -- Morgan Stanley Dean Witter Distributors Inc., a
wholly-owned broker-dealer subsidiary of MSDW.

"Financial Advisors " -- Morgan Stanley Dean Witter authorized financial
services representatives.

"Fund " -- Morgan Stanley Dean Witter North American Government Income
Trust, a registered open-end investment company.

"Investment Manager " -- Morgan Stanley Dean Witter Advisors Inc., a
wholly-owned investment advisor subsidiary of MSDW.

"Independent Trustees " -- Trustees who are not "interested persons" (as
defined by the Investment Company Act) of the Fund.

"Morgan Stanley & Co." -- Morgan Stanley & Co. Incorporated, a
wholly-owned broker-dealer subsidiary of MSDW.

"Morgan Stanley Dean Witter Funds " -- Registered investment companies (i)
for which the Investment Manager serves as the investment advisor; and (ii)
that hold themselves out to investors as related companies for investment and
investor services.

"MSDW " -- Morgan Stanley Dean Witter & Co., a preeminent global financial
services firm.

"MSDW Services Company " -- Morgan Stanley Dean Witter Services Company
Inc., a wholly-owned fund services subsidiary of the Investment Manager.

"Sub-Advisor " -- TCW Funds Management, Inc., a wholly-owned subsidiary of
TCW.

"TCW " -- The TCW Group, Inc., a preeminent investment management and
investment advisory services firm.

"Transfer Agent " -- Morgan Stanley Dean Witter Trust FSB, a wholly-owned
transfer agent subsidiary of MSDW.

"Trustees " -- The Board of Trustees of the Fund.

3
<PAGE>

I. FUND HISTORY
- --------------------------------------------------------------------------------

The Fund was organized under the laws of the Commonwealth of Massachusetts
on February 19, 1992 as a Massachusetts business trust under the name "TCW/DW
North American Government Income Trust." On February 25, 1999 the Fund's
Trustees adopted an Amendment to the Fund's Declaration of Trust changing the
name of the Fund to Morgan Stanley Dean Witter North American Government Income
Trust.

II. DESCRIPTION OF THE FUND AND ITS INVESTMENTS AND RISKS
- --------------------------------------------------------------------------------

A. CLASSIFICATION

The Fund is an open-end, non-diversified management investment company
whose investment objective is to earn a high level of current income while
maintaining relatively low volatility of principal.

B. INVESTMENT STRATEGIES AND RISKS

The following discussion of the Fund's investment strategies and risks
should be read with the sections of the Fund's Prospectus titled "Principal
Investment Strategies," "Principal Risks," "Additional Investment Strategy
Information" and "Additional Risk Information."

FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS. The Fund may enter into
forward foreign currency exchange contracts ("forward contracts") to facilitate
settlement or in an attempt to limit the effect of changes in the relationship
between the U.S. dollar and the foreign currency during the period between the
date on which the security is purchased or sold and the date on which payment
is made or received. In addition, the Fund may enter into forward contracts as
a hedge against fluctuations in future foreign exchange rates. The Fund may
conduct its foreign currency exchange transactions either on a spot (i.e.,
cash) basis at the spot rate prevailing in the foreign currency exchange
market, or through entering into forward contracts to purchase or sell foreign
currencies. A forward contract involves an obligation to purchase or sell a
specific currency at a future date, which may be any fixed number of days from
the date of the contract agreed upon by the parties, at a price set at the time
of the contract. These contracts are traded in the interbank market conducted
directly between currency traders (usually large commercial and investment
banks) and their customers. Forward contracts will only be entered into with
United States banks and their foreign branches, insurance companies or other
dealers or foreign banks whose assets total $1 billion or more. A forward
contract generally has no deposit requirement, and no commissions are charged
at any stage for trades.

The Fund also may from time to time utilize forward contracts to hedge a
foreign security held in the portfolio or a security which pays out principal
tied to an exchange rate between the U.S. dollar and a foreign currency,
against a decline in value of the applicable foreign currency. They also may be
used to lock in the current exchange rate of the currency in which those
securities anticipated to be purchased are denominated. At times, the Fund may
enter into "cross-currency" hedging transactions involving currencies other
than those in which securities are held or proposed to be purchased are
denominated.

The Fund will not enter into forward currency contracts or maintain a net
exposure to these contracts where the consummation of the contracts would
obligate the Fund to deliver an amount of foreign currency in excess of the
value of the Fund's portfolio securities.

Although the Fund values its assets daily in terms of U.S. dollars, it
does not intend to convert its holdings of foreign currencies into U.S. dollars
on a daily basis. It will, however, do so from time to time, and investors
should be aware of the costs of currency conversion. Although foreign exchange
dealers do not charge a fee for conversion, they do realize a profit based on
the spread between the prices at which they are buying and selling various
currencies. Thus, a dealer may offer to sell a foreign currency to the Fund at
one rate, while offering a lesser rate of exchange should the Fund desire to
resell that currency to the dealer.

The Fund may be limited in its ability to enter into hedging transactions
involving forward contracts by the Internal Revenue Code requirements relating
to qualification as a regulated investment company.

4
<PAGE>

Forward contracts may limit gains on portfolio securities that could
otherwise be realized had they not been utilized and could result in losses.
The contracts also may increase the Fund's volatility and may involve a
significant amount of risk relative to the investment of cash.

OPTION AND FUTURES TRANSACTIONS. The Fund may engage in transactions in
listed and OTC options. Listed options are issued or guaranteed by the exchange
on which they are traded or by a clearing corporation such as the Options
Clearing Corporation ("OCC"). Ownership of a listed call option gives the Fund
the right to buy from the OCC (in the U.S.) or other clearing corporation or
exchange, the underlying security or currency covered by the option at the
stated exercise price (the price per unit of the underlying security) by filing
an exercise notice prior to the expiration date of the option. The writer
(seller) of the option would then have the obligation to sell to the OCC (in
the U.S.) or other clearing corporation or exchange, the underlying security or
currency at that exercise price prior to the expiration date of the option,
regardless of its then current market price. Ownership of a listed put option
would give the Fund the right to sell the underlying security or currency to
the OCC (in the U.S.) or other clearing corporation or exchange, at the stated
exercise price. Upon notice of exercise of the put option, the writer of the
put would have the obligation to purchase the underlying security or currency
from the OCC (in the U.S.) or other clearing corporation or exchange, at the
exercise price.

COVERED CALL WRITING. The Fund is permitted to write covered call options
on portfolio securities, without limit, and may also write covered call options
on the U.S. dollar and foreign currencies in which its portfolio securities are
denominated, without limit.

The Fund will receive from the purchaser, in return for a call it has
written, a "premium;" i.e., the price of the option. Receipt of these premiums
may better enable the Fund to earn a higher level of current income than it
would earn from holding the underlying securities (or currencies) alone.
Moreover, the premium received will offset a portion of the potential loss
incurred by the Fund if the securities (or currencies) underlying the option
decline in value.

The Fund may be required, at any time during the option period, to deliver
the underlying security (or currency) against payment of the exercise price on
any calls it has written. This obligation is terminated upon the expiration of
the option period or at such earlier time when the writer effects a closing
purchase transaction. A closing purchase transaction is accomplished by
purchasing an option of the same series as the option previously written.
However, once the Fund has been assigned an exercise notice, the Fund will be
unable to effect a closing purchase transaction.

Options written by the Fund normally have expiration dates of up to
eighteen months from the date written. The exercise price of a call option may
be below, equal to or above the current market value of the underlying security
at the time the option is written.

COVERED PUT WRITING. The Fund may engage in covered put writing. As a
writer of a covered put option, the Fund incurs an obligation to buy the
security underlying the option from the purchaser of the put, at the option's
exercise price at any time during the option period, at the purchaser's
election. Through the writing of a put option, the Fund would receive income
from the premium paid by purchasers. The potential gain on a covered put option
is limited to the premium received on the option (less the commissions paid on
the transaction). At any time during the option period, the Fund may be
required to make payment of the exercise price against delivery of the
underlying security (or currency). The aggregate value of the obligations
underlying puts may not exceed 50% of the Fund's net assets.

PURCHASING CALL AND PUT OPTIONS. The Fund may purchase listed and OTC call
and put options in amounts equaling up to 5% of its total assets. The purchase
of a call option would enable the Fund, in return for the premium paid, to lock
in a purchase price for a security or currency during the term of the option.
The purchase of a put option would enable the Fund, in return for a premium
paid, to lock in a price at which it may sell a security or currency during the
term of the option.

OPTIONS ON FOREIGN CURRENCIES. The Fund may purchase and write options on
foreign currencies for purposes similar to those involved with investing in
forward foreign currency exchange contracts.

OTC OPTIONS. OTC options are purchased from or sold (written) to dealers
or financial institutions which have entered into direct agreements with the
Fund. With OTC options, such variables as expiration

5
<PAGE>

date, exercise price and premium will be agreed upon between the Fund and the
transacting dealer, without the intermediation of a third party such as the
OCC. The Fund may engage in OTC option transactions only with member banks of
the Federal Reserve Bank System or primary dealers in U.S. Government
securities or with affiliates of such banks or dealers.

RISKS OF OPTIONS TRANSACTIONS. The successful use of options depends on
the ability of the Investment Manager or the Sub-Advisor, to forecast correctly
interest rates, currency exchange rates and/or market movements. If the market
value of the portfolio securities (or the currencies in which they are
denominated) upon which call options have been written increases, the Fund may
receive a lower total return from the portion of its portfolio upon which calls
have been written than it would have had such calls not been written. During
the option period, the covered call writer has, in return for the premium on
the option, given up the opportunity for capital appreciation above the
exercise price should the market price of the underlying security (or the value
of its denominated currency) increase, but has retained the risk of loss should
the price of the underlying security (or the value of its denominated currency)
decline. The covered put writer also retains the risk of loss should the market
value of the underlying security decline below the exercise price of the option
less the premium received on the sale of the option. In both cases, the writer
has no control over the time when it may be required to fulfill its obligation
as a writer of the option. Prior to exercise or expiration, an option position
can only be terminated by entering into a closing purchase or sale transaction.
Once an option writer has received an exercise notice, it cannot effect a
closing purchase transaction in order to terminate its obligation under the
option and must deliver or receive the underlying securities at the exercise
price.

The Fund's ability to close out its position as a writer of an option is
dependent upon the existence of a liquid secondary market on option exchanges.
There is no assurance that such a market will exist, particularly in the case
of OTC options.

In the event of the bankruptcy of a broker through which the Fund engages
in transactions in options, the Fund could experience delays and/or losses in
liquidating open positions purchased or sold through the broker and/or incur a
loss of all or part of its margin deposits with the broker. In the case of OTC
options, if the transacting dealer fails to make or take delivery of the
securities underlying an option it has written, in accordance with the terms of
that option, due to insolvency or otherwise, the Fund would lose the premium
paid for the option as well as any anticipated benefit of the transaction.

Each of the exchanges has established limitations governing the maximum
number of call or put options on the same underlying security which may be
written by a single investor, whether acting alone or in concert with others
(regardless of whether such options are written on the same or different
exchanges or are held or written on one or more accounts or through one or more
brokers). An exchange may order the liquidation of positions found to be in
violation of these limits and it may impose other sanctions or restrictions.
These position limits may restrict the number of listed options which the Fund
may write.

The hours of trading for options may not conform to the hours during which
the underlying securities are traded. To the extent that the option markets
close before the markets for the underlying securities, significant price and
rate movements can take place in the underlying markets that cannot be
reflected in the option markets.

The markets in foreign currency options are relatively new and the Fund's
ability to establish and close out positions on such options is subject to the
maintenance of a liquid secondary market. There can be no assurance that a
liquid secondary market will exist for a particular option at any specific
time.

The value of a foreign currency option depends upon the value of the
underlying currency relative to the U.S. dollar. As a result, the price of the
option position may vary with changes in the value of either or both currencies
and have no relationship to the investment merits of a foreign security.
Because foreign currency transactions occurring in the interbank market involve
substantially larger amounts than those that may be involved in the use of
foreign currency options, investors may be disadvantaged by having to deal in
an odd lot market (generally consisting of transactions of less than $1
million) for the underlying foreign currencies at prices that are less
favorable than for round lots.

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There is no systematic reporting of last sale information for foreign
currencies or any regulatory requirement that quotations available through
dealers or other market sources be firm or revised on a timely basis. Quotation
information available is generally representative of very large transactions in
the interbank market and thus may not reflect relatively smaller transactions
(i.e., less than $1 million) where rates may be less favorable. The interbank
market in foreign currencies is a global, around-the-clock market. To the
extent that the U.S. options markets are closed while the markets for the
underlying currencies remain open, significant price and rate movements may
take place in the underlying markets that are not reflected in the options
market.

FUTURES CONTRACTS. The Fund may purchase and sell interest rate and index
futures contracts that are traded on U.S. commodity exchanges on such
underlying securities as U.S. Treasury bonds, notes, bills,GNMA Certificates
and on any foreign government fixed-income security and on various currencies,
and on such indexes of U.S. securities (and, if applicable, foreign securities)
as may exist or come into existence.

A futures contract purchaser incurs an obligation to take delivery of a
specified amount of the obligation underlying the contract at a specified time
in the future for a specified price. A seller of a futures contract incurs an
obligation to deliver the specified amount of the underlying obligation at a
specified time in return for an agreed upon price. The purchase of a futures
contract enables the Fund, during the term of the contract, to lock in a price
at which it may purchase a security or currency and protect against a rise in
prices pending purchase of portfolio securities. The sale of a futures contract
enables the Fund to lock in a price at which it may sell a security or currency
and protect against declines in the value of portfolio securities.

Although most futures contracts call for actual delivery or acceptance of
securities, the contracts usually are closed out before the settlement date
without the making or taking of delivery. Index futures contracts provide for
the delivery of an amount of cash equal to a specified dollar amount times the
difference between the index value at the open or close of the last trading day
of the contract and the futures contract price. A futures contract sale is
closed out by effecting a futures contract purchase for the same aggregate
amount of the specific type of security (currency) and the same delivery date.
If the sale price exceeds the offsetting purchase price, the seller would be
paid the difference and would realize a gain. If the offsetting purchase price
exceeds the sale price, the seller would pay the difference and would realize a
loss. Similarly, a futures contract purchase is closed out by effecting a
futures contract sale for the same aggregate amount of the specific type of
security (currency) and the same delivery date. If the offsetting sale price
exceeds the purchase price, the purchaser would realize a gain, whereas if the
purchase price exceeds the offsetting sale price, the purchaser would realize a
loss. There is no assurance that the Fund will be able to enter into a closing
transaction.

MARGIN. If the Fund enters into a futures contract, it is initially
required to deposit an "initial margin" of cash or U.S. Government securities
or other liquid portfolio securities ranging from approximately 2% to 5% of the
contract amount. Initial margin requirements are established by the exchanges
on which futures contracts trade and may, from time to time, change. In
addition, brokers may establish margin deposit requirements in excess of those
required by the exchanges.

Initial margin in futures transactions is different from margin in
securities transactions in that initial margin does not involve the borrowing
of funds by a broker's client but is, rather, a good faith deposit on the
futures contract which will be returned to the Fund upon the proper termination
of the futures contract. The margin deposits made are marked to market daily
and the Fund may be required to make subsequent deposits of cash or U.S.
Government securities, called "variation margin," which are reflective of price
fluctuations in the futures contract.

OPTIONS ON FUTURES CONTRACTS. The Fund may purchase and write call and put
options on futures contracts and enter into closing transactions with respect
to such options to terminate an existing position. An option on a futures
contract gives the purchaser the right (in return for the premium paid), and
the writer the obligation, to assume a position in a futures contract (a long
position if the option is a call and a short position if the option is a put)
at a specified exercise price at any time during the term of the option. Upon
exercise of the option, the delivery of the futures position by the writer of
the option

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<PAGE>

to the holder of the option is accompanied by delivery of the accumulated
balance in the writer's futures margin account, which represents the amount by
which the market price of the futures contract at the time of exercise exceeds,
in the case of a call, or is less than, in the case of a put, the exercise
price of the option on the futures contract.

The writer of an option on a futures contract is required to deposit
initial and variation margin pursuant to requirements similar to those
applicable to futures contracts. Premiums received from the writing of an
option on a futures contract are included in initial margin deposits.

LIMITATIONS ON FUTURES CONTRACTS AND OPTIONS ON FUTURES. The Fund may not
enter into futures contracts or purchase related options thereon if,
immediately thereafter, the amount committed to margin plus the amount paid for
premiums for unexpired options on futures contracts exceeds 5% of the value of
the Fund's total assets, after taking into account unrealized gains and
unrealized losses on such contracts into which it has entered; provided,
however, that in the case of an option that is in-the-money (the exercise price
of the call (put) option is less (more) than the market price of the underlying
security) at the time of purchase, the in-the-money amount may be excluded in
calculating the 5%. However, there is no overall limitation on the percentage
of the Fund's net assets which may be subject to a hedge position.

RISKS OF TRANSACTIONS IN FUTURES CONTRACTS AND RELATED OPTIONS. The prices
of securities and indexes subject to futures contracts (and thereby the futures
contract prices) may correlate imperfectly with the behavior of the cash prices
of the Fund's securities (and the currencies in which they are denominated).
Also, prices of futures contracts may not move in tandem with the changes in
prevailing interest rates, market movements and/or currency exchange rates
against which the Fund seeks a hedge. A correlation may also be distorted (a)
temporarily, by short-term traders seeking to profit from the difference
between a contract or security price objective and their cost of borrowed
funds; (b) by investors in futures contracts electing to close out their
contracts through offsetting transactions rather than meet margin deposit
requirements; (c) by investors in futures contracts opting to make or take
delivery of underlying securities rather than engage in closing transactions,
thereby reducing liquidity of the futures market; and (d) temporarily, by
speculators who view the deposit requirements in the futures markets as less
onerous than margin requirements in the cash market. Due to the possibility of
price distortion in the futures market and because of the possible imperfect
correlation between movements in the prices of securities and movements in the
prices of futures contracts, a correct forecast of interest rate, currency
exchange rate and/or market movement trends by the Investment Manager and/or
the Sub-Advisor may still not result in a successful hedging transaction.

There is no assurance that a liquid secondary market will exist for
futures contracts and related options in which the Fund may invest. In the
event a liquid market does not exist, it may not be possible to close out a
futures position and, in the event of adverse price movements, the Fund would
continue to be required to make daily cash payments of variation margin. In
addition, limitations imposed by an exchange or board of trade on which futures
contracts are traded may compel or prevent the Fund from closing out a contract
which may result in reduced gain or increased loss to the Fund. The absence of
a liquid market in futures contracts might cause the Fund to make or take
delivery of the underlying securities (currencies) at a time when it may be
disadvantageous to do so.

Exchanges limit the amount by which the price of a futures contract may
move on any day. If the price moves equal the daily limit on successive days,
then it may prove impossible to liquidate a futures position until the daily
limit moves have ceased. In the event of adverse price movements, the Fund
would continue to be required to make daily cash payments of variation margin
on open futures positions. In these situations, if the Fund has insufficient
cash, it may have to sell portfolio securities to meet daily variation margin
requirements at a time when it may be disadvantageous to do so. In addition,
the Fund may be required to take or make delivery of the instruments underlying
interest rate futures contracts it holds at a time when it is disadvantageous
to do so. The inability to close out options and futures positions could also
have an adverse impact on the Fund's ability to effectively hedge its
portfolio.

Futures contracts and options thereon which are purchased or sold on
foreign commodities exchanges may have greater price volatility than their U.S.
counterparts. Furthermore, foreign

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<PAGE>

commodities exchanges may be less regulated and under less governmental
scrutiny than U.S. exchanges. Brokerage commissions, clearing costs and other
transaction costs may be higher on foreign exchanges. Greater margin
requirements may limit the Fund's ability to enter into certain commodity
transactions on foreign exchanges. Moreover, differences in clearance and
delivery requirements on foreign exchanges may occasion delays in the
settlement of the Fund's transactions effected on foreign exchanges.

In the event of the bankruptcy of a broker through which the Fund engages
in transactions in futures or options thereon, the Fund could experience delays
and/or losses in liquidating open positions purchased or sold through the
broker and/or incur a loss of all or part of its margin deposits with the
broker.

COLLATERALIZED MORTGAGE OBLIGATIONS. The Fund may invest in CMOs -
collateralized mortgage obligations. CMOs are debt obligations collateralized
by mortgage loans or mortgage pass-through securities (collectively "Mortgage
Assets"). Payments of principal and interest on the Mortgage Assets and any
reinvestment income are used to make payments on the CMOs. CMOs are issued in
multiple classes. Each class has a specific fixed or floating coupon rate and a
stated maturity or final distribution date. The principal and interest on the
Mortgage Assets may be allocated among the classes in a number of different
ways. Certain classes will, as a result of the collection, have more
predictable cash flows than others. As a general matter, the more predictable
the cash flow, the lower the yield relative to other Mortgage Assets. The less
predictable the cash flow, the higher the yield and the greater the risk. The
Fund may invest in any class of CMO.

Certain mortgage-backed securities in which the Fund may invest
(e.g.,certain classes of CMOs) may increase or decrease in value substantially
with changes in interest rates and/or the rates of prepayment. In addition, if
the collateral securing CMOs or any third party guarantees are insufficient to
make payments, the Fund could sustain a loss.

In addition, the Fund may invest in stripped mortgage-backed securities,
which are usually structured in two classes. One class entitles the holder to
receive all or most of the interest but little or none of the principal of a
pool of Mortgage Assets (the interest-only or "IO Class"), while the other
class entitles the holder to receive all or most of the principal but little or
none of the interest (the principal-only or "PO" Class). IOs tend to decrease
in value substantially if interest rates decline and prepayment rates become
more rapid. POs tend to decrease in value substantially if interest rates
increase and the rate of repayment decreases.

The Fund may invest up to 10% of its assets in inverse floaters. An
inverse floater has a coupon rate that moves in the direction opposite to that
of a designated interest rate index. Like most other fixed income securities,
the value of inverse floaters will decrease as interest rates increase. They
are more volatile, however, than most other fixed income securities because the
coupon rate on an inverse floater typically changes at a multiple of the change
in the relevant index rate. Thus, any rise in the index rate (as a consequence
of an increase in interest rates) causes a correspondingly greater drop in the
coupon rate of an inverse floater while a drop in the index rate causes a
correspondingly greater increase in the coupon of an inverse floater. Some
inverse floaters may also increase or decrease substantially because of changes
in the rate of prepayments.

ASSET-BACKED SECURITIES. The Fund may invest in Asset-Backed Securities.
Asset-Backed Securities represent the securitization techniques used to develop
mortgage-backed securities are also applied to a broad range of other assets.
Various types of assets, primarily automobile and credit card receivables and
home equity loans, are being securitized in pass-through structures similar to
the mortgage pass-through structures. These types of securities are known as
asset-backed securities. The Fund may invest in any type of asset-backed
security.

Asset-backed securities have risk characteristics similar to
mortgage-backed securities. Like mortgage-backed securities, they generally
decrease in value as a result of interest rate increases, but may benefit less
than other fixed-income securities from declining interest rates, principally
because of prepayments. Also, as in the case of mortgage-backed securities,
prepayments generally increase

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<PAGE>

during a period of declining interest rates although other factors, such as
changes in credit use and payment patterns, may also influence prepayment
rates. Asset-backed securities also involve the risk that various federal and
state consumer laws and other legal and economic factors may result in the
collateral backing the securities being insufficient to support payment on the
securities.

MONEY MARKET SECURITIES. The Fund may invest in various money market
securities for cash management purposes or when assuming a temporary defensive
position, which among others may include commercial paper, bank acceptances,
bank obligations, corporate debt securities, certificates of deposit, U.S.
Government securities and obligations of savings institutions and repurchase
agreements. Such securities are limited to:

U.S. Government Securities. Obligations issued or guaranteed as to
principal and interest by the United States or its agencies (such as the
Export-Import Bank of the United States, Federal Housing Administration and
Government National Mortgage Association) or its instrumentalities (such as the
Federal Home Loan Bank), including Treasury bills, notes and bonds;

Bank Obligations. Obligations (including certificates of deposit and
bankers' acceptances) of banks subject to regulation by the U.S. Government and
having total assets of $1 billion or more, and instruments secured by such
obligations, not including obligations of foreign branches of domestic banks
except to the extent below;

Eurodollar Certificates of Deposit. Eurodollar certificates of deposit
issued by foreign branches of domestic banks having total assets of $1 billion
or more;

Obligations of Savings Institutions. Certificates of deposit of savings
banks and savings and loan associations, having total assets of $1 billion or
more;

Fully Insured Certificates of Deposit. Certificates of deposit of banks
and savings institutions having total assets of less than $1 billion, if the
principal amount of the obligation is federally insured by the Bank Insurance
Fund or the Savings Association Insurance Fund (each of which is administered
by the FDIC), limited to $100,000 principal amount per certificate and to 10%
or less of the Fund's total assets in all such obligations and in all illiquid
assets, in the aggregate;

Commercial Paper. Commercial paper rated within the two highest grades by
Standard & Poor's Corporation ("S&P") or the two highest grade by Moody's
Investor's Service, Inc. ("Moody's") or, if not rated, issued by a company
having an outstanding debt issue rated at least AA by S&P or Aa by Moody's; and

Repurchase Agreements. The Fund may invest in repurchase agreements. When
cash may be available for only a few days, it may be invested by the Fund in
repurchase agreements until such time as it may otherwise be invested or used
for payments of obligations of the Fund. These agreements, which may be viewed
as a type of secured lending by the Fund, typically involve the acquisition, by
the Fund, of debt securities from a selling financial institution such as a
bank, savings and loan association or broker-dealer. The agreement provides
that the Fund will sell back to the institution, and that the institution will
repurchase, the underlying security serving as collateral at a specified price
and at a fixed time in the future, usually not more than seven days from the
date of purchase. The collateral will be marked-to-market daily to determine
that the value of the collateral, as specified in the agreement, does not
decrease below the purchase price plus accrued interest. If such decrease
occurs, additional collateral will be requested and, when received, added to
the account to maintain full collateralization. The Fund will accrue interest
from the institution until the time when the repurchase is to occur. Although
this date is deemed by the Fund to be the maturity date of a repurchase
agreement, the maturities of securities subject to repurchase agreements are
not subject to any limits.

While repurchase agreements involve certain risks not associated with
direct investments in debt securities, the Fund follows procedures designed to
minimize such risks. These procedures include effecting repurchase transactions
only with large, well-capitalized and well-established financial institutions
whose financial condition will be continually monitored by the Investment
Manager and/or Sub-Advisor subject to procedures established by the Trustees.
In addition, as described above, the

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<PAGE>

value of the collateral underlying the repurchase agreement will be at least
equal to the repurchase price, including any accrued interest earned on the
repurchase agreement. In the event of a default or bankruptcy by a selling
financial institution, the Fund will seek to liquidate such collateral.
However, the exercising of the Fund's right to liquidate such collateral could
involve certain costs or delays and, to the extent that proceeds from any sale
upon a default of the obligation to repurchase were less than the repurchase
price, the Fund could suffer a loss. It is the current policy of the Fund not
to invest in repurchase agreements that do not mature within seven days if any
such investment, together with any other illiquid assets held by the Fund,
amounts to more than 15% of its net assets.

REVERSE REPURCHASE AGREEMENTS AND DOLLAR ROLLS. The Fund may use reverse
repurchase agreements for purposes of meeting redemptions or as part of its
investment strategy and may also use dollar rolls as part of its investment
strategy.

Reverse repurchase agreements involve sales by the Fund of assets
concurrently with an agreement by the Fund to repurchase the same assets at a
later date at a fixed price. Reverse repurchase agreements involve the risk
that the market value of the securities the Fund is obligated to purchase under
the agreement may decline below the repurchase price. In the event the buyer of
securities under a reverse repurchase agreement files for bankruptcy or becomes
insolvent, the Fund's use of the proceeds of the agreement may be restricted
pending a determination by the other party, or its trustee or receiver, whether
to enforce the Fund's obligation to repurchase the securities.

Dollar rolls involve the Fund selling securities for delivery in the
current month and simultaneously contracting to repurchase substantially
similar (same type and coupon) securities on a specified future date. During
the roll period, the Fund will forgo principal and interest paid on the
securities. The Fund is compensated by the difference between the current sales
price and the lower forward price for the future purchase (often referred to as
the "drop") as well as by the interest earned on the cash proceeds of the
initial sale.

Reverse repurchase agreements and dollar rolls are speculative techniques
involving leverage and are considered borrowings by the Fund. Reverse
repurchase agreements and dollar rolls are not expected to exceed 25% of the
Fund's total assets.

ZERO COUPON SECURITIES. A portion of the fixed-income securities purchased
by the Fund may be zero coupon securities. Such securities are purchased at a
discount from their face amount, giving the purchaser the right to receive
their full value at maturity. The interest earned on such securities is,
implicitly, automatically compounded and paid out at maturity. While such
compounding at a constant rate eliminates the risk of receiving lower yields
upon reinvestment of interest if prevailing interest rates decline, the owner
of a zero coupon security will be unable to participate in higher yields upon
reinvestment of interest received on interest-paying securities if prevailing
interest rates rise.

A zero coupon security pays no interest to its holder during its life.
Therefore, to the extent the Fund invests in zero coupon securities, it will
not receive current cash available for distribution to shareholders. In
addition, zero coupon securities are subject to substantially greater price
fluctuations during periods of changing prevailing interest rates than are
comparable securities which pay interest on a current basis. Current federal
tax law requires that a holder (such as the Fund) of a zero coupon security
accrue a portion of the discount at which the security was purchased as income
each year even though the Fund receives no interest payments in cash on the
security during the year.

LENDING PORTFOLIO SECURITIES. The Fund may lend its portfolio securities
to brokers, dealers and other financial institutions, provided that the loans
are callable at any time by the Fund, and are at all times secured by cash or
cash equivalents, which are maintained in a segregated account pursuant to
applicable regulations and that are equal to at least 100% of the market value,
determined daily, of the loaned securities. The advantage of these loans is
that the Fund continues to receive the income on the loaned securities while at
the same time earning interest on the cash amounts deposited as collateral,
which will be invested in short-term obligations. The Fund will not lend more
than 25% of the value of its total assets.

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<PAGE>

As with any extensions of credit, there are risks of delay in recovery
and, in some cases, even loss of rights in the collateral should the borrower
of the securities fail financially. However, these loans of portfolio
securities will only be made to firms deemed by the Fund's management to be
creditworthy and when the income which can be earned from such loans justifies
the attendant risks. Upon termination of the loan, the borrower is required to
return the securities to the Fund. Any gain or loss in the market price during
the loan period would inure to the Fund.

When voting or consent rights which accompany loaned securities pass to
the borrower, the Fund will follow the policy of calling the loaned securities,
to be delivered within one day after notice, to permit the exercise of the
rights if the matters involved would have a material effect on the Fund's
investment in the loaned securities. The Fund will pay reasonable finder's,
administrative and custodial fees in connection with a loan of its securities.

WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS. The
Fund may purchase securities on a when-issued or delayed delivery basis or may
purchase or sell securities on a forward commitment basis. When these
transactions are negotiated, the price is fixed at the time of the commitment,
but delivery and payment can take place a month or more after the date of
commitment. While the Fund will only purchase securities on a when-issued,
delayed delivery or forward commitment basis with the intention of acquiring
the securities, the Fund may sell the securities before the settlement date, if
it is deemed advisable. The securities so purchased or sold are subject to
market fluctuation and no interest or dividends accrue to the purchaser prior
to the settlement date.

At the time the Fund makes the commitment to purchase or sell securities
on a when-issued, delayed delivery or forward commitment basis, it will record
the transaction and thereafter reflect the value, each day, of such security
purchased, or if a sale, the proceeds to be received, in determining its net
asset value. At the time of delivery of the securities, their value may be more
or less than the purchase or sale price. An increase in the percentage of the
Fund's assets committed to the purchase of securities on a when-issued, delayed
delivery or forward commitment basis may increase the volatility of its net
asset value. The Fund will also establish a segregated account on the Fund's
books in which it will continually maintain cash or cash equivalents or other
liquid portfolio securities equal in value to commitments to purchase
securities on a when-issued, delayed delivery or forward commitment basis.

WHEN, AS AND IF ISSUED SECURITIES. The Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security depends
upon the occurrence of a subsequent event, such as approval of a merger,
corporate reorganization or debt restructuring. The commitment for the purchase
of any such security will not be recognized in the portfolio of the Fund until
the Investment Manager and/or Sub-Advisor determines that issuance of the
security is probable. At that time, the Fund will record the transaction and,
in determining its net asset value, will reflect the value of the security
daily. At that time, the Fund will also establish a segregated account on the
Fund's books in which it will maintain cash or cash equivalents or other liquid
portfolio securities equal in value to recognized commitments for such
securities.

An increase in the percentage of the Fund's assets committed to the
purchase of securities on a "when, as and if issued" basis may increase the
volatility of its net asset value. The Fund may also sell securities on a
"when, as and if issued" basis provided that the issuance of the security will
result automatically from the exchange or conversion of a security owned by the
Fund at the time of sale.

PRIVATE PLACEMENTS AND RESTRICTED SECURITIES. The Fund may invest up to
15% of its net assets in securities which are subject to restrictions on resale
because they have not been registered under the Securities Act of 1933 (the
"Securities Act"), or which are otherwise not readily marketable. (Securities
eligible for resale pursuant to Rule 144A under the Securities Act, and
determined to be liquid pursuant to the procedures discussed in the following
paragraph, are not subject to the foregoing restriction.) These securities are
generally referred to as "private placements" or "restricted securities."
Limitations on the resale of these securities may have an adverse effect on
their marketability, and may prevent the Fund from disposing of them promptly
at reasonable prices. The Fund may have to bear the expense of registering the
securities for resale and the risk of substantial delays in effecting the
registration.

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<PAGE>

Rule 144A permits the Fund to sell restricted securities to qualified
institutional buyers without limitation. The Investment Manager and/or
Sub-Advisor, pursuant to procedures adopted by the Trustees, will make a
determination as to the liquidity of each restricted security purchased by the
Fund. If a restricted security is determined to be "liquid," the security will
not be included within the category "illiquid securities," which under current
policy may not exceed 15% of the Fund's net assets. However, investing in Rule
144A securities could have the effect of increasing the level of Fund
illiquidity to the extent the Fund, at a particular point in time, may be
unable to find qualified institutional buyers interested in purchasing such
securities.

YEAR 2000. The investment management services provided to the Fund by the
Investment Manager and the Sub-Advisor and the services provided to
shareholders by the Distributor and the Transfer Agent depend on the smooth
functioning of their computer systems. Many computer software systems in use
today cannot recognize the year 2000, but revert to 1900 or some other date,
due to the manner in which dates were encoded and calculated. That failure
could have a negative impact on the handling of securities trades, pricing and
account services. The Investment Manager, the Sub-Advisor, the Distributor and
the Transfer Agent have been actively working on necessary changes to their own
computer systems to prepare for the year 2000 and expect that their systems
will be adapted before that date, but there can be no assurance that they will
be successful, or that interaction with other non-complying computer systems
will not impair their services at that time.

In addition, it is possible that the markets for securities in which the
Fund invests may be detrimentally affected by computer failures throughout the
financial services industry beginning January 1, 2000. Improperly functioning
trading systems may result in settlement problems and liquidity issues. In
addition, corporate and governmental data processing errors may result in
production problems for individual companies and overall economic
uncertainties. Earnings of individual issuers will be affected by remediation
costs, which may be substantial and may be reported inconsistently in U.S. and
foreign financial statements. Accordingly, the Fund's investments may be
adversely affected.

C. FUND POLICIES/INVESTMENT RESTRICTIONS

The investment objective, policies and restrictions listed below have been
adopted by the Fund as fundamental policies. Under the Investment Company Act
of 1940 (the "Investment Company Act"), a fundamental policy may not be changed
without the vote of a majority of the outstanding voting securities of the
Fund. The Investment Company Act defines a majority as the lesser of (a) 67% or
more of the shares present at a meeting of shareholders, if the holders of 50%
of the outstanding shares of the Fund are present or represented by proxy; or
(b) more than 50% of the outstanding shares of the Fund. For purposes of the
following restrictions: (i) all percentage limitations apply immediately after
a purchase or initial investment; and (ii) any subsequent change in any
applicable percentage resulting from market fluctuations or other changes in
total or net assets does not require elimination of any security from the
portfolio.

The Fund will:

1. Seek to earn a high level of current income while maintaining
relatively low volatility of principal.

The Fund may not:

1. Purchase or sell real estate or interests therein (including limited
partnership interests), although the Fund may purchase securities of
issuers which engage in real estate operations and securities secured
by real estate or interests therein.

2. Purchase oil, gas or other mineral leases, rights or royalty contracts
or exploration or development programs, except that the Fund may
invest in the securities of companies which operate, invest in, or
sponsor such programs.

3. Borrow money, except that the Fund (i) may borrow from a bank for
temporary or emergency purposes in amounts not exceeding 5% (taken at
the lower of cost or current value) of its total assets (not including
the amount borrowed), and (ii) may engage in reverse repurchase
agreements and dollar rolls.

13
<PAGE>

4. Pledge its assets or assign or otherwise encumber them except to
secure borrowings effected within the limitations set forth in
restriction (3). For the purpose of this restriction, collateral
arrangements with respect to initial or variation margin for futures
are not deemed to be pledges of assets.

5. Issue senior securities as defined in the Act except insofar as the
Fund may be deemed to have issued a senior security by reason of (a)
entering into any repurchase agreement; (b) purchasing any securities
on a when-issued or delayed delivery basis; (c) purchasing or selling
any financial futures contracts or options thereon; (d) borrowing
money in accordance with restrictions described above; or (e) lending
portfolio securities.

6. Make loans of money or securities, except: (a) by the purchase of
portfolio securities in which the Fund may invest consistent with its
investment objective and policies; (b) by investment in repurchase
agreements; or (c) by lending its portfolio securities.

7. Make short sales of securities.

8. Purchase securities on margin, except for such short-term loans as are
necessary for the clearance of portfolio securities. The deposit or
payment by the Fund of initial or variation margin in connection with
futures contracts is not considered the purchase of a security on
margin.

9. Engage in the underwriting of securities, except insofar as the Fund
may be deemed an underwriter under the Securities Act of 1933 in
disposing of a portfolio security.

10. Invest for the purpose of exercising control or management of any
other issuer.

If a percentage restriction is adhered to at the time of investment, a
later increase or decrease in percentage resulting from a change in values of
portfolio securities or amount of total or net assets will not be considered a
violation of any of the foregoing restrictions.

III. MANAGEMENT OF THE FUND
- --------------------------------------------------------------------------------

A. BOARD OF TRUSTEES

The Board of Trustees of the Fund oversees the management of the Fund but
does not itself manage the Fund. The Trustees review various services provided
by or under the direction of the Investment Manager to ensure that the Fund's
general investment policies and programs are properly carried out. The Trustees
also conduct their review to ensure that administrative services are provided
to the Fund in a satisfactory manner.

Under state law, the duties of the Trustees are generally characterized as
a duty of loyalty and a duty of care. The duty of loyalty requires a Trustee to
exercise his or her powers in the interest of the Fund and not the Trustee's
own interest or the interest of another person or organization. A Trustee
satisfies his or her duty of care by acting in good faith with the care of an
ordinarily prudent person and in a manner the Trustee reasonably believes to be
in the best interest of the Fund and its shareholders.

B. MANAGEMENT INFORMATION

TRUSTEES AND OFFICERS. The Board of the Fund consists of eight (8)
Trustees. These same individuals also serve as trustees for all of the Morgan
Stanley Dean Witter Funds. Six Trustees (75% of the total number) have no
affiliation or business connection with the Investment Manager or any of its
affiliated persons and do not own any stock or other securities issued by the
Investment Manager's parent company, MSDW or the Sub-Advisor's parent company,
TCW. These are the "disinterested" or "independent" Trustees. The other two
Trustees (the "Management Trustees") are affiliated with the Investment
Manager. All of the Independent Trustees also serve as Independent Trustees of
"Discover Brokerage Index Series," a mutual fund for which the Investment
Manager is the investment advisor.

The Trustees and executive officers of the Fund, their principal business
occupations during the last five years and their affiliations, if any, with the
Investment Manager or the Sub-Advisor, and with the 84 Morgan Stanley Dean
Witter Funds are shown below.

14
<PAGE>

<TABLE>
<CAPTION>
NAME, AGE, POSITION WITH FUND AND ADDRESS PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------- ----------------------------------------------------
<S> <C>
Michael Bozic (58) ........................ Vice Chairman of Kmart Corporation (since
Trustee December, 1998); Director or Trustee of the Morgan
c/o Kmart Corporation Stanley Dean Witter Funds and Discover Brokerage
3100 West Big Beaver Road Index Series; formerly Chairman and Chief
Troy, Michigan Executive Officer of Levitz Furniture Corporation
(November, 1995-November, 1998) and President
and Chief Executive Officer of Hills Department
Stores (May, 1991-July, 1995); formerly variously
Chairman, Chief Executive Officer, President and
Chief Operating Officer (1987-1991) of the Sears
Merchandise Group of Sears, Roebuck and Co.;
Director of Eaglemark Financial Services, Inc. and
Weirton Steel Corporation.

Charles A. Fiumefreddo* (65) .............. Chairman, Director or Trustee and Chief Executive
Chairman of the Board Officer of the Morgan Stanley Dean Witter Funds,
Chief Executive Officer and Trustee the TCW/DW Funds and Discover Brokerage Index
Two World Trade Center Series; formerly Chairman, Chief Executive Officer
New York, New York and Director of the Investment Manager, the
Distributor and MSDW Services Company;
Executive Vice President and Director of Dean
Witter Reynolds; Chairman and Director of the
Transfer Agent; formerly Director and/or officer of
various MSDW subsidiaries (until June, 1998).

Edwin J. Garn (66) ........................ Director or Trustee of the Morgan Stanley Dean
Trustee Witter Funds and Discover Brokerage Index Series;
c/o Huntsman Corporation formerly United States Senator (R-Utah)
500 Huntsman Way (1974-1992) and Chairman, Senate Banking
Salt Lake City, Utah Committee (1980-1986); formerly Mayor of Salt
Lake City, Utah (1971-1974); formerly Astronaut,
Space Shuttle Discovery (April 12-19, 1985); Vice
Chairman, Huntsman Corporation; Director of
Franklin Covey (time management systems), BMW
Bank of North America, Inc., United Space Alliance
(joint venture between Lockheed Martin and the
Boeing Company) and Nuskin Asia Pacific
(multilevel marketing); member of the board of
various civic and charitable organizations.

Wayne E. Hedien (65) ...................... Retired; Director or Trustee of the Morgan Stanley
Trustee Dean Witter Funds and Discover Brokerage Index
c/o Gordon Altman Butowsky Series; Director of The PMI Group, Inc. (private
Weitzen Shalov & Wein mortgage insurance); Trustee and Vice Chairman
Counsel to the Independent Trustees of The Field Museum of Natural History; formerly
114 West 47th Street associated with the Allstate Companies
New York, New York (1966-1994), most recently as Chairman of The
Allstate Corporation (March, 1993-December,
1994) and Chairman and Chief Executive Officer of
its wholly-owned subsidiary, Allstate Insurance
Company (July, 1989-December, 1994); director
of various other business and charitable
organizations.
</TABLE>

15
<PAGE>

<TABLE>
<CAPTION>
NAME, AGE, POSITION WITH FUND AND ADDRESS PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------- -----------------------------------------------------
<S> <C>
Dr. Manuel H. Johnson (50) ................ Senior Partner, Johnson Smick International, Inc.,
Trustee a consulting firm; Co-Chairman and a founder of
c/o Johnson Smick International, Inc. the Group of Seven Council (G7C), an international
1133 Connecticut Avenue, N.W. economic commission; Chairman of the Audit
Washington, D.C. Committee and Director or Trustee of the Morgan
Stanely Dean Witter Funds, the TCW/DW Funds
and Discover Brokerage Index Series; Trustee of
the TCW/DW Funds; Trustee of Discover
Brokerage Index Series; Director of NASDAQ
(since June, 1995); Director of Greenwich Capital
Markets, Inc. (broker-dealer) and NVR, Inc. (home
construction); Chairman and Trustee of the
Financial Accounting Foundation (oversight
organization of the Financial Accounting Standards
Board); formerly Vice Chairman of the Board of
Governors of the Federal Reserve System
(1986-1990) and Assistant Secretary of the U.S.
Treasury.

Michael E. Nugent (62) .................... General Partner, Triumph Capital, L.P., a private
Trustee investment partnership; Chairman of the Insurance
c/o Triumph Capital, L.P. Committee and Director or Trustee of the Morgan
237 Park Avenue Stanley Dean Witter Funds, the TCW/DW Funds
New York, New York and Discover Brokerage Index Series; formerly
Vice President, Bankers Trust Company and BT
Capital Corporation (1984-1988); director of various
business organizations.

Philip J. Purcell* (55) ................... Chairman of the Board of Directors and Chief
Trustee Executive Officer of MSDW, Dean Witter Reynolds
1585 Broadway and Novus Credit Services Inc.; Director of the
New York, New York Distributor; Director or Trustee of the Morgan
Stanley Dean Witter Funds and Discover Brokerage
Index Series; Director and/or officer of various
MSDW subsidiaries.

John L. Schroeder (68) .................... Retired; Chairman of the Deriatives Committee
Trustee and Director or Trustee of the Morgan Stanley
c/o Gordon Altman Butowsky Dean Witter Funds, the TCW/DW Funds and
Weitzen Shalov & Wein Discover Brokerage Index Series; Director of
Counsel to the Independent Trustees Citizens Utilities Company; formerly Executive Vice
114 West 47th Street President and Chief Investment Officer of Home
New York, New York Insurance Company (August, 1991-September,
1995).
</TABLE>

16
<PAGE>

<TABLE>
<CAPTION>
NAME, AGE, POSITION WITH FUND AND ADDRESS PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------- -----------------------------------------------------
<S> <C>
Mitchell M. Merin (45) .................... President and Chief Operating Officer of Asset
President Management of MSDW (since December, 1998);
Two World Trade Center President and Director (since April, 1997) and
New York, New York Chief Executive Officer (since June, 1998) of the
Investment Manager and MSDW Services
Company; Chairman, Chief Executive Officer and
Director of the Distributor (since June, 1998);
Chairman and Chief Executive Officer (since June,
1998) and Director (since January, 1998) of the
Transfer Agent; Director of various MSDW
subsidiaries; President of the Morgan Stanley Dean
Witter Funds, the TCW/DW Funds and Discover
Brokerage Index Series (since May, 1999);
previously Chief Strategic Officer of the Investment
Manager and MSDW Services Company and
Executive Vice President of the Distributor (April,
1997-June, 1998), Vice President of the Morgan
Stanley Dean Witter Funds, the TCW/DW Funds
and Discover Brokerage Index Series (May,
1997-April, 1999), and Executive Vice President of
Dean Witter, Discover & Co.

Barry Fink (44) ........................... Senior Vice President (since March, 1997) and
Vice President, Secretary and General Counsel (since February,
Secretary and General Counsel 1997) and Director (since July, 1998) of the
Two World Trade Center Investment Manager and MSDW Services
New York, New York Company; Senior Vice President (since March,
1997) and Assistant Secretary and Assistant
General Counsel (since February, 1997) of the
Distributor; Assistant Secretary of Dean Witter
Reynolds (since August, 1996); Vice President,
Secretary and General Counsel of the Morgan
Stanley Dean Witter Funds and the TCW/DW
Funds (since February, 1997); Vice President,
Secretary and General Counsel of Discover
Brokerage Index Series; previously First Vice
President (June, 1993-February, 1997), Vice
President and Assistant Secretary and Assistant
General Counsel of the Investment Manager and
MSDW Services Company and Assistant Secretary
of the Morgan Stanley Dean Witter Funds and the
TCW/DW Funds.

Philip A. Barach (46) ..................... Group Managing Director and Chief Investment
Vice President Officer--Investment Grade Fixed Income of the
865 South Figueroa Street Adviser, Trust Company of the West and TCW
Los Angeles, California Asset Management Company; Vice President of
various TCW/DW Funds.

James M. Goldberg (53) .................... Managing Director of the Advisor, Managing
Vice President Director and Chairman of the Fixed Income Policy
865 South Figueroa Street Committee of Trust Company of the West and
Los Angeles, California TCW Asset Management Company; Vice President
of various TCW/DW Funds.
</TABLE>

17
<PAGE>

Frederick H. Horton (40) .................. Managing Director of the Adviser, Trust Company
Vice President of the West and TCW Asset Management Company
865 South Figueroa Street (since October, 1993); previously Senior Portfolio
Los Angeles, California Manager for Dewey Square Investors (June,
1991--September, 1993).

Thomas F. Caloia (53) ..................... First Vice President and Assistant Treasurer of the
Treasurer Manager and MSDW Advisors; Treasurer of the
Two World Trade Center TCW/DW Funds, the Morgan Stanley Dean Witter
New York, New York Funds and Discover Brokerage Index Series.
</TABLE>

- ----------
* Denotes Trustees who are "interested persons" of the Fund as defined by the
Investment Company Act.

In addition, Ronald E. Robison, Executive Vice President, Chief
Administrative Officer and Director of the Investment Manager and MSDW Services
Company, Robert S. Giambrone, Senior Vice President of the Investment Manager,
MSDW Services Company, the Distributor and the Transfer Agent and Director of
the Transfer Agent, and Joseph J. McAlinden, Executive Vice President and Chief
Investment Officer of the Investment Manager and Director of the Transfer
Agent, and Peter M. Avelar, Kenton J. Hinchliffe, Mark Bavoso, and Jonathan R.
Page, Senior Vice Presidents of the Investment Manager, are Vice Presidents of
the Fund,

In addition, Frank Bruttomesso, Marilyn K. Cranney, Lou Anne D. McInnis,
Carsten Otto and Ruth Rossi, First Vice Presidents and Assistant General
Counsels of the Investment Manager and MSDW Services Company, and Todd Lebo,
Vice President and Assistant General Counsel of the Investment Manager and MSDW
Services Company, are Assistant Secretaries of the Fund.

INDEPENDENT TRUSTEES AND THE COMMITTEES. Law and regulation establish both
general guidelines and specific duties for the Independent Trustees. The Morgan
Stanley Dean Witter Funds seek as Independent Trustees individuals of
distinction and experience in business and finance, government service or
academia; these are people whose advice and counsel are in demand by others and
for whom there is often competition. To accept a position on the Funds' Boards,
such individuals may reject other attractive assignments because the Funds make
substantial demands on their time. Indeed, by serving on the Funds' Boards,
certain Trustees who would otherwise be qualified and in demand to serve on
bank boards would be prohibited by law from doing so. All of the Independent
Trustees serve as members of the Audit Committee. In addition, three of the
Trustees, including two Independent Trustees, serve as members of the
Derivatives Committee and the Insurance Committee.

The Independent Trustees are charged with recommending to the full Board
approval of management, advisory and administration contracts, plans and
distribution and underwriting agreements; continually reviewing Fund
performance; checking on the pricing of portfolio securities, brokerage
commissions, transfer agent costs and performance, and trading among Funds in
the same complex; and approving fidelity bond and related insurance coverage
and allocations, as well as other matters that arise from time to time. The
Independent Trustees are required to select and nominate individuals to fill
any Independent Trustee vacancy on the Board of any Fund that has a Rule 12b-1
plan of distribution. Most of the Morgan Stanley Dean Witter Funds have a Rule
12b-1 plan.

The Audit Committee is charged with recommending to the full Board the
engagement or discharge of the Fund's independent accountants; directing
investigations into matters within the scope of the independent accountants'
duties, including the power to retain outside specialists; reviewing with the
independent accountants the audit plan and results of the auditing engagement;
approving professional services provided by the independent accountants and
other accounting firms prior to the performance of the services; reviewing the
independence of the independent accountants; considering the range of

18
<PAGE>

audit and non-audit fees; reviewing the adequacy of the Fund's system of
internal controls; and preparing and submitting Committee meeting minutes to
the full Board.

The Board of each Fund has a Derivatives Committee to approve parameters
for and monitor the activities of the Fund with respect to derivative
investments, if any, made by the Fund.

Finally, the Board of each Fund has formed an Insurance Committee to
review and monitor the insurance coverage maintained by the Fund.

ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL
MORGAN STANLEY DEAN WITTER FUNDS. The Independent Trustees and the Funds'
management believe that having the same Independent Trustees for each of the
Morgan Stanley Dean Witter Funds avoids the duplication of effort that would
arise from having different groups of individuals serving as Independent
Trustees for each of the Funds or even of sub-groups of Funds. They believe
that having the same individuals serve as Independent Trustees of all the Funds
tends to increase their knowledge and expertise regarding matters which affect
the Fund complex generally and enhances their ability to negotiate on behalf of
each Fund with the Fund's service providers. This arrangement also precludes
the possibility of separate groups of Independent Trustees arriving at
conflicting decisions regarding operations and management of the Funds and
avoids the cost and confusion that would likely ensue. Finally, having the same
Independent Trustees serve on all Fund Boards enhances the ability of each Fund
to obtain, at modest cost to each separate Fund, the services of Independent
Trustees, of the caliber, experience and business acumen of the individuals who
serve as Independent Trustees of the Morgan Stanley Dean Witter Funds.

TRUSTEE AND OFFICER INDEMNIFICATION. The Fund's Declaration of Trust
provides that no Trustee, officer, employee or agent of the Fund is liable to
the Fund or to a shareholder, nor is any Trustee, officer, employee or agent
liable to any third persons in connection with the affairs of the Fund, except
as such liability may arise from his/her or its own bad faith, willful
misfeasance, gross negligence or reckless disregard of his/her or its duties.
It also provides that all third persons shall look solely to the Fund property
for satisfaction of claims arising in connection with the affairs of the Fund.
With the exceptions stated, the Declaration of Trust provides that a Trustee,
officer, employee or agent is entitled to be indemnified against all liability
in connection with the affairs of the Fund.

C. COMPENSATION

The Fund pays each Independent Trustee an annual fee of $800 plus a per
meeting fee of $50 for meetings of the Board of Trustees, the Independent
Trustees or Committees of the Board of Trustees attended by the Trustee (the
Fund pays the Chairman of the Audit Committee an additional annual fee of $750,
and the Chairman of the Derivatives and Insurance Committees additional annual
fees of $500). If a Board meeting and a meeting of the Independent Trustees or
a Committee meeting, or a meeting of the Independent Trustees and/or more than
one Committee meeting, take place on a single day, the Trustees are paid a
single meeting fee by the Fund. The Fund also reimburses such Trustees for
travel and other out-of-pocket expenses incurred by them in connection with
attending such meetings. Trustees and officers of the Fund who are or have been
employed by the Investment Manager or an affiliated company receive no
compensation or expense reimbursement from the Fund for their services as
Trustee.

At their June 8, 1999 meeting, shareholders elected or re-elected, as
appropriate, the following eight individuals to the Fund's Board of Trustees to
serve for indefinite terms: Michael Bozic, Charles A. Fiumefreddo, Edwin Jacob
(Jake) Garn, Wayne E. Hedien, Dr. Manuel H. Johnson, Michael E. Nugent, Philip
J. Purcell and John L. Schroeder. Messrs. Fiumefreddo, Johnson, Nugent and
Schroeder previously served as Trustees of the Fund and were previously elected
by shareholders. Messrs. Bozic, Garn, Hedien and Purcell previously held
directorships or trusteeships with the other Morgan Stanley Dean Witter Funds
and were elected to replace Messrs. Argue, DeMartini, Larkin and Stern who
resigned as Trustees. Messrs. Bozic, Garn, Hedien and Purcell commenced service
at the time the new Investment Management Agreement took effect on June 25,
1999. Prior to the effectiveness of the election of Messrs. Bozic, Garn, Hedien
and Purcell and the resignation of Messrs. Argue, DeMartini,

19
<PAGE>

Larkin and Stern, the Fund paid each Independent Trustee an annual fee of
$2,225 plus a per meeting fee of $200 for meetings of the Board of Trustees or
committees of the Board attended by the Trustee. The fee paid by the Fund to
the Chairman of the Audit Committee and the Chairman of the Independent
Trustees remained unchanged.

The following table illustrates the compensation that the Fund paid to
those of its Independent Trustees who were Trustees of the Fund on October 31,
1998, for the fiscal year ended on that date.

FUND COMPENSATION

AGGREGATE
COMPENSATION
NAME OF INDEPENDENT TRUSTEE FROM THE FUND
- --------------------------- -------------

Dr. Manuel H. Johnson ......................................... $5,256
Michael E. Nugent ............................................. 5,256
John L. Schroeder ............................................. 5,456

At such time as the Fund has paid fees to the Independent Trustees for a
full fiscal year at the lower current compensation rates set forth above, and
assuming that during such fiscal year the Fund holds the same number of
meetings of the Board, the Independent Trustees and the Committees as were held
by the other Morgan Stanley Dean Witter Funds during the calendar year ended
December 31, 1998, it is estimated that the compensation paid to each
Independent Trustee during such fiscal year will be $1,650 and an additional
$750 to Dr. Johnson who serves as Chairman of the Audit Committee.

The following table illustrates the compensation paid to the Fund's
Independent Trustees for the calendar year ended December 31, 1998 for services
to the 85 Morgan Stanley Dean Witter Funds and, in the case of Messrs. Johnson,
Nugent and Schroeder, the 11 TCW/DW Funds that were in operation at December
31, 1998. With respect to Messrs. Johnson, Nugent and Schroeder, the TCW/DW
Funds are included solely because of a limited exchange privilege between those
Funds and five Morgan Stanley Dean Witter Money Market Funds. No compensation
was paid to the Fund's Independent Trustees by Discover Brokerage Index Series
for the calendar year ended December 31, 1998.

CASH COMPENSATION FROM MORGAN STANLEY DEAN WITTER FUNDS AND TCW/DW FUNDS

<TABLE>
<CAPTION>
TOTAL CASH
COMPENSATION
FOR SERVICES TO
FOR SERVICE 85 MORGAN
AS DIRECTOR OR FOR SERVICE AS STANLEY DEAN
TRUSTEE AND TRUSTEE AND WITTER FUNDS
COMMITTEE MEMBER COMMITTEE MEMBER AND 11
NAME OF OF 85 MORGAN STANLEY DEAN OF 11 TCW/DW TCW/DW
INDEPENDENT TRUSTEE WITTER FUNDS FUNDS FUNDS
- ------------------- ------------ ----- -----
<S> <C> <C> <C>
Michael Bozic .......... $120,150 -- $120,150
Edwin J. Garn .......... 132,450 -- 132,450
Wayne E. Hedien ........ 132,350 -- 132,350
Dr. Manuel H. Johnson .. 128,400 $62,331 190,731
Michael E. Nugent ...... 132,450 62,131 194,581
John L. Schroeder ...... 132,450 64,731 197,181
</TABLE>

As of the date of this Statement of Additional Information, 55 of the
Morgan Stanley Dean Witter Funds, not including the Fund, have adopted a
retirement program under which an Independent Trustee who retires after serving
for at least five years (or such lesser period as may be determined by the
Board)

- ----------
(1) An Eligible Trustee may elect alternative payments of his or her
retirement benefits based upon the combined life expectancy of the
Eligible Trustee and his or her spouse on the date of such Eligible
Trustee's retirement. In addition, the Eligible Trustee may elect that
the surviving spouse's periodic payment of benefits will be equal to a
lower percentage of the periodic amount when both spouses were alive. The
amount estimated to be payable under this method, through the remainder
of the later of the lives of the Eligible Trustee and spouse, will be the
actuarial equivalent of the Regular Benefit.

20
<PAGE>

as an Independent Director or Trustee of any Morgan Stanley Dean Witter Fund
that has adopted the retirement program (each such Fund referred to as an
"Adopting Fund" and each such Trustee referred to as an "Eligible Trustee") is
entitled to retirement payments upon reaching the eligible retirement age
(normally, after attaining age 72), Annual payments are based upon length of
service.

Currently, upon retirement, each Eligible Trustee is entitled to receive
from the Adopting Fund, commencing as of his or her retirement date and
continuing for the remainder of his or her life, an annual retirement benefit
(the "Regular Benefit") equal to 30.22% of his or her Eligible Compensation
plus 0.5036667% of such Eligible Compensation for each full month of service as
an Independent Director or Trustee of any Adopting Fund in excess of five years
up to a maximum of 60.44% after ten years of service. The foregoing percentages
may be changed by the Board(1). "Eligible Compensation" is one-fifth of the
total compensation earned by such Eligible Trustee for service to the Adopting
Fund in the five year period prior to the date of the Eligible Trustee's
retirement. Benefits under the retirement program are not secured or funded by
the Adopting Funds.

The following table illustrates the retirement benefits accrued to the
Fund's Independent Trustees by the 55 Morgan Stanley Dean Witter Funds (not
including the Fund) for the year ended December 31, 1998, and the estimated
retirement benefits for the Independent Trustees, to commence upon their
retirement, from the 55 Morgan Stanley Dean Witter Funds as of December 31,
1998.

RETIREMENT BENEFITS FROM ALL MORGAN STANLEY DEAN WITTER FUNDS

<TABLE>
<CAPTION>
FOR ALL ADOPTING FUNDS
---------------------------------
ESTIMATED
CREDITED
YEARS ESTIMATED RETIREMENT BENEFITS ESTIMATED ANNUAL
OF SERVICE AT PERCENTAGE OF ACCRUED AS EXPENSES BENEFITS UPON RETIREMENT
NAME OF RETIREMENT ELIGIBLE BY ALL FROM ALL
INDEPENDENT TRUSTEE (MAXIMUM 10) COMPENSATION ADOPTING FUNDS ADOPTING FUNDS(2)
- ------------------- ------------ ------------ -------------- -----------------
<S> <C> <C> <C> <C>
Michael Bozic ............. 10 60.44% $22,377 $52,250
Edwin J. Garn ............. 10 60.44 35,225 52,250
Wayne E. Hedien ........... 9 51.37 41,979 44,413
Dr. Manuel H. Johnson 10 60.44 14,047 52,250
Michael E. Nugent ......... 10 60.44 25,336 52,250
John L. Schroeder ......... 8 50.37 45,117 44,343
</TABLE>

- ----------
(2) Based on current levels of compensation. Amount of annual benefits also
varies depending on the Trustee's elections described in Footnote (1) on
page 15.

IV. CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
- --------------------------------------------------------------------------------

The following persons owned 5% or more of the Class A Shares of the Fund
as of May 31, 1999:

[TO COME]

As of the date of this Statement of Additional Information, the aggregate
number of shares of beneficial interest of the Fund owned by the Fund's
officers and Trustees as a group was less than 1% of the Fund's shares of
beneficial interest outstanding.

V. MANAGEMENT, INVESTMENT ADVICE AND OTHER SERVICES
- --------------------------------------------------------------------------------

A. INVESTMENT MANAGER AND SUB-ADVISOR

The Investment Manager to the Fund is Morgan Stanley Dean Witter Advisors
Inc., a Delaware corporation, whose address is Two World Trade Center, New
York, New York 10048. The Investment Manager is a wholly-owned subsidiary of
MSDW, a Delaware corporation. MSDW is a preeminent global financial services
firm that maintains leading market positions in each of its three primary
businesses: securities, asset management and credit services.

The Sub-Advisor is TCW Funds Management, Inc., a wholly-owned subsidiary
of TCW, whose direct and indirect subsidiaries provide a variety of trust,
investment management and investment advisory

21
<PAGE>

services. The Sub-Advisor is headquartered at 865 South Figueroa Street, Suite
1800, Los Angeles, California 90017. Robert A. Day, who is Chairman of the
Board of Directors of TCW, may be deemed to be a control person of the
Sub-Advisor by virtue of the aggregate ownership by Mr. Day and his family of
more than 25% of the outstanding voting stock of TCW. The Sub-Advisor was
retained to provide sub-advisory services to the Fund effective June 25, 1999.

Pursuant to an Investment Management Agreement (the "Management Agreement")
with the Investment Manager, the Fund has retained the Investment Manager to
provide administrative services, manage its business affairs and supervise the
investment of the Fund's assets. The Fund pays the Investment Manager monthly
compensation calculated daily by applying the following annual rates to the net
assets of the Fund determined as of the close of each business day: 0.65% to
the portion of daily net assets not exceeding $500 million; and 0.60% to the
portion of daily net assets exceeding $500 million. The Investment Manager has
retained its wholly-owned subsidiary, MSDW Services Company, to perform
administrative services for the Fund.

Under a Sub-Advisory Agreement (the "Sub-Advisory Agreement ") between the
Sub-Advisor and the Investment Manager, the Sub-Advisor provides the Fund with
investment advice and portfolio management relating to the Fund's investments
in securities, subject to the overall supervision of the Investment Manager.
The Investment Manager pays the Sub-Advisor monthly compensation equal to 40%
of the Investment Manager's fee.

Prior to June, 1999, the Fund was managed by MSDW Services Company,
pursuant to a management agreement between the Fund and MSDW Services Company
and was advised by TCW Funds Management, Inc. pursuant to an advisory agreement
between the Fund and TCW Funds Management, Inc. As part of an overall
consolidation of the TCW/DW Family of Funds and the Morgan Stanley Dean Witter
Family of Funds, the Fund's Board of Trustees recommended on February 25, 1999
and shareholders of the Fund approved on June 8, 1999 the Investment Management
Agreement between the Fund and Morgan Stanley Dean Witter Advisors Inc. The
Board also recommended and shareholders also approved the Sub-Advisory
Agreement between MSDW Advisors and TCW Funds Management, Inc. The fee rate
under the Management Agreement with MSDW Advisors is identical to the total
aggregate fee rate in effect under the previous management and advisory
agreements. For the fiscal years ended October 31, 1996, 1997 and 1998 MSDW
Services Company accrued total compensation under the old management agreement
in the amounts of $1,912,210, $1,052,959 and $697,150, respectively. For the
same periods, TCW Funds Management, Inc. accrued total compensation in its
capacity of adviser to the Fund in the amounts of $1,274,806, $701,973 and
$464,767, respectively.

B. PRINCIPAL UNDERWRITER

The Fund's principal underwriter is the Distributor (which has the same
address as the Investment Manager). In this capacity, the Fund's shares are
distributed by the Distributor. The Distributor has entered into a Selected
Dealer Agreement with Dean Witter Reynolds, which through its own sales
organization sells shares of the Fund. In addition, the Distributor may enter
into similar agreements with other selected broker-dealers. The Distributor, a
Delaware corporation, is a wholly-owned subsidiary of MSDW.

The Distributor bears all expenses it may incur in providing services
under the Distribution Agreement. These expenses include the payment of
commissions for sales of the Fund's shares and incentive compensation to
Financial Advisors. The Distributor also pays certain expenses in connection
with the distribution of the Fund's shares, including the costs of preparing,
printing and distributing advertising or promotional materials, and the costs
of printing and distributing prospectuses and supplements thereto used in
connection with the offering and sale of the Fund's shares. The Fund bears the
costs of initial typesetting, printing and distribution of prospectuses and
supplements thereto to shareholders. The Fund also bears the costs of
registering the Fund and its shares under federal and state securities laws and
pays filing fees in accordance with state securities laws.

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<PAGE>

The Fund and the Distributor have agreed to indemnify each other against
certain liabilities, including liabilities under the Securities Act. Under the
Distribution Agreement, the Distributor uses its best efforts in rendering
services to the Fund, but in the absence of willful misfeasance, bad faith,
gross negligence or reckless disregard of its obligations, the Distributor is
not liable to the Fund or any of its shareholders for any error of judgment or
mistake of law or for any act or omission or for any losses sustained by the
Fund or its shareholders.

C. SERVICES PROVIDED BY THE INVESTMENT MANAGER, THE SUB-ADVISOR AND FUND
EXPENSES PAID BY THIRD PARTIES

The Investment Manager supervises the investment of the Fund's assets. The
Investment Manager obtains and evaluates the information and advice relating to
the economy, securities markets, and specific securities as it considers
necessary or useful to continuously oversee the management of the assets of the
Fund in a manner consistent with its investment objective.

Under the terms of the Management Agreement, the Investment Manager also
maintains certain of the Fund's books and records and furnishes, at its own
expense, the office space, facilities, equipment, clerical help, bookkeeping
and certain legal services as the Fund may reasonably require in the conduct of
its business, including the preparation of prospectuses, proxy statements and
reports required to be filed with federal and state securities commissions
(except insofar as the participation or assistance of independent accountants
and attorneys is, in the opinion of the Investment Manager, necessary or
desirable). In addition, the Investment Manager pays the salaries of all
personnel, including officers of the Fund, who are employees of the Investment
Manager. The Investment Manager also bears the cost of telephone service, heat,
light, power and other utilities provided to the Fund.

Pursuant to the Sub-Advisory Agreement, the Sub-Advisor has been retained,
subject to the overall supervision of the Investment Manager, to continuously
furnish investment advice concerning individual security selections, asset
allocations and overall economic trends.

Expenses not expressly assumed by the Investment Manager under the
Management Agreement or by the Distributor, will be paid by the Fund. These
expenses will be allocated among the four Classes of shares pro rata based on
the net assets of the Fund attributable to each Class, except as described
below. Such expenses include, but are not limited to: expenses of the Plan of
Distribution pursuant to Rule 12b-1; charges and expenses of any registrar,
custodian, stock transfer and dividend disbursing agent; brokerage commissions;
taxes; engraving and printing share certificates; registration costs of the
Fund and its shares under federal and state securities laws; the cost and
expense of printing, including typesetting, and distributing prospectuses of
the Fund and supplements thereto to the Fund's shareholders; all expenses of
shareholders' and Trustees' meetings and of preparing, printing and mailing of
proxy statements and reports to shareholders; fees and travel expenses of
Trustees or members of any advisory board or committee who are not employees of
the Investment Manager or any corporate affiliate of the Investment Manager;
all expenses incident to any dividend, withdrawal or redemption options;
charges and expenses of any outside service used for pricing of the Fund's
shares; fees and expenses of legal counsel, including counsel to the Trustees
who are not interested persons of the Fund or of the Investment Manager (not
including compensation or expenses of attorneys who are employees of the
Investment Manager); fees and expenses of the Fund's independent accountants;
membership dues of industry associations; interest on Fund borrowings; postage;
insurance premiums on property or personnel (including officers and Trustees)
of the Fund which inure to its benefit; extraordinary expenses (including, but
not limited to, legal claims and liabilities and litigation costs and any
indemnification relating thereto); and all other costs of the Fund's operation.

The Management Agreement provides that in the absence of willful
misfeasance, bad faith, gross negligence or reckless disregard of its
obligations thereunder, the Investment Manager is not liable to the Fund or any
of its investors for any act or omission by the Investment Manager or for any
losses sustained by the Fund or its investors.

The Management Agreement will remain in effect from year to year, provided
continuance of the Management Agreement is approved at least annually by the
vote of the holders of a majority, as defined in the Investment Company Act, of
the outstanding shares of the Fund, or by the Trustees; provided that in either
event such continuance is approved annually by the vote of a majority of the
Trustees who are not parties to the Management Agreement or the Sub-Advisory
Agreement or are "independent Trustees," which votes must be cast in person at
a meeting called for the purpose of voting on such approval.

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<PAGE>

D. RULE 12B-1 PLAN

In accordance with a Plan of Distribution pursuant to Rule 12b-1 under the
Investment Company Act between the Fund and the Distributor, the Distributor
provides certain services in connection with the promotion of sales of Fund
shares (the "Plan").

The Distributor receives the proceeds of front-end sales charges ("FSCs")
imposed on most sales of the Fund's shares. The Distributor has informed the
Fund that it has received approximately $58,000, $44,000 and $50,000,
respectively in sales charges on sales of the Fund's shares for the fiscal
years ended November 30, 1996, 1997 and 1998.

The Plan provides that the Distributor bears the expense of all
promotional and distribution related activities on behalf of the Fund, except
for expenses that the Trustees determine to reimburse, as described below. The
following activities and services may be provided by the Distributor under the
Plan: (1) compensation to and expenses of Dean Witter Reynolds' Financial
Advisors and other Selected Broker-Dealers' account executives and other
employees, including overhead and telephone expenses; (2) sales incentives and
bonuses to sales representatives and to marketing personnel in connection with
promoting sales of the Fund's shares; (3) expenses incurred in connection with
promoting sales of the Fund's shares; (4) preparing and distributing sales
literature; and (5) providing advertising and promotional activities, including
direct mail solicitation and television, radio, newspaper, magazine and other
media advertisements.

The Fund is authorized to reimburse specific expenses incurred or to be
incurred in promoting the distribution of the Fund's shares. Reimbursement is
made through payments at the end of each month. The amount of each monthly
payment may in no event exceed an amount equal to a payment at the annual rate
of 0.75 of 1% of the Fund's average daily net assets during the month. No
interest or other financing charges will be incurred for which reimbursement
payments under the Plan will be made. In addition, no interest charges, if any,
incurred on any distribution expenses will be reimbursable under the Plan. In
the case of all expenses other than expenses representing a residual to
Financial Advisors and other authorized financial representatives, such amounts
shall be determined at the beginning of each calendar quarter by the Trustees,
including a majority of the Independent 12b-1 Trustees. Expenses representing a
residual to Financial Advisors and other authorized financial representatives,
may be reimbursed without prior determination. In the event that the
Distributor proposes that monies shall be reimbursed for other than such
expenses, then in making quarterly determinations of the amounts that may be
expended by the Fund, the Investment Manager provides and the Trustees review a
quarterly budget of projected incremental distribution expenses to be incurred
on behalf of the Fund, together with a report explaining the purposes and
anticipated benefits of incurring such expenses. The Trustees determine which
particular expenses, and the portions thereof, that may be borne by the Fund,
and in making such a determination shall consider the scope of the
Distributor's commitment to promoting the distribution of the Fund's shares.

The Fund accrued a total of $1,299,994 pursuant to the Plan of
Distribution for the fiscal year ended October 31, 1998. It is estimated that
the amounts paid by the Fund for distribution were for expenses which relate to
compensation of sales personnel and associated overhead expenses.

Under the Plan, the Distributor uses its best efforts in rendering
services to the Fund, but in the absence of willful misfeasance, bad faith,
gross negligence or reckless disregard of its obligations, the Distributor is
not liable to the Fund or any of its shareholders for any error of judgment or
mistake of law or for any act or omission or for any losses sustained by the
Fund or its shareholders.

Under the Plan, the Distributor provides the Fund, for review by the
Trustees, and the Trustees review, promptly after the end of each calendar
quarter, a written report regarding the incremental distribution expenses
incurred on behalf of the Fund during such calendar quarter, which report
includes (1) an itemization of the types of expenses and the purposes
therefore; (2) the amounts of such expenses; and (3) a description of the
benefits derived by the Fund. In the Trustees' quarterly review of the Plan
they consider its continued appropriateness and the level of compensation
provided therein.

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<PAGE>

No interested person of the Fund nor any Independent Trustee has any
direct financial interest in the operation of the Plan except to the extent
that the Distributor, the Investment Manager, Dean Witter Reynolds, MSDW
Services Company or certain of their employees may be deemed to have such an
interest as a result of benefits derived from the successful operation of the
Plan or as a result of receiving a portion of the amounts expended thereunder
by the Fund.

On an annual basis, the Trustees, including a majority of the Independent
Trustees, consider whether the Plan should be continued. Prior to approving the
last continuation of the Plan, the Trustees requested and received from the
Distributor and reviewed all the information which they deemed necessary to
arrive at an informed determination. In making their determination to continue
the Plan, the Trustees considered: (1) the Fund's experience under the Plan and
whether such experience indicates that the Plan is operating as anticipated;
(2) the benefits the Fund had obtained, was obtaining and would be likely to
obtain under the Plan, including that: (a) the Plan is essential in order to
give Fund investors a choice of alternatives for payment of distribution and
service charges and to enable the Fund to continue to grow and avoid a pattern
of net redemptions which, in turn, are essential for effective investment
management; and (b) without the compensation to individual brokers and the
reimbursement of distribution and account maintenance expenses of Dean Witter
Reynolds's branch offices made possible by the 12b-1 fees, Dean Witter Reynolds
could not establish and maintain an effective system for distribution,
servicing of Fund shareholders and maintenance of shareholder accounts; and (3)
what services had been provided and were continuing to be provided under the
Plan to the Fund and its shareholders. Based upon their review, the Trustees,
including each of the Independent Trustees, determined that continuation of the
Plan would be in the best interest of the Fund and would have a reasonable
likelihood of continuing to benefit the Fund and its shareholders. In the
Trustees' quarterly review of the Plan, they will consider its continued
appropriateness and the level of compensation provided therein.

The Plan may not be amended to increase materially the amount to be spent
for the services described therein without approval by the shareholders of the
Fund, and all material amendments to the Plan must also be approved by the
Trustees in the manner described above. The Plan may be terminated at any time,
without payment of any penalty, by vote of a majority of the Independent
Trustees or by a vote of a majority of the outstanding voting securities of the
Fund (as defined in the Investment Company Act) on not more than thirty days'
written notice to any other party to the Plan. So long as the Plan is in
effect, the election and nomination of Independent Trustees shall be committed
to the discretion of the Independent Trustees.

E. OTHER SERVICE PROVIDERS

(1) TRANSFER AGENT/DIVIDEND-PAYING AGENT

Morgan Stanley Dean Witter Trust FSB is the Transfer Agent for the Fund's
shares and the Dividend Disbursing Agent for payment of dividends and
distributions on Fund shares and Agent for shareholders under various
investment plans. The principal business address of the Transfer Agent is
Harborside Financial Center, Plaza Two, Jersey City, New Jersey 07311.

(2) CUSTODIAN AND INDEPENDENT ACCOUNTANTS

The Bank of New York, 90 Washington Street, New York, New York 10286, is
the Custodian of the Fund's assets. Any of the Fund's cash balances with the
Custodian in excess of $100,000 are unprotected by federal deposit insurance.
These balances may, at times, be substantial.

, serves as
the independent accountants of the Fund. The independent accountants are
responsible for auditing the annual financial statements of the Fund.

(3) AFFILIATED PERSONS

The Transfer Agent is an affiliate of the Investment Manager, and of the
Distributor. As Transfer Agent and Dividend Disbursing Agent, the Transfer
Agent's responsibilities include maintaining shareholder accounts, disbursing
cash dividends and reinvesting dividends, processing account registration

25
<PAGE>

changes, handling purchase and redemption transactions, mailing prospectuses
and reports, mailing and tabulating proxies, processing share certificate
transactions, and maintaining shareholder records and lists. For these
services, the Transfer Agent receives a per shareholder account fee from the
Fund and is reimbursed for its out-of-pocket expenses in connection with such
services.

VI. BROKERAGE ALLOCATION AND OTHER PRACTICES
- --------------------------------------------------------------------------------

A. BROKERAGE TRANSACTIONS

Subject to the general supervision of the Trustees, the Investment Manager
and/or Sub-Advisor are responsible for decisions to buy and sell securities for
the Fund, the selection of brokers and dealers to effect the transactions, and
the negotiation of brokerage commissions, if any. The Fund expects that the
primary market for the securities in which it invests will generally be the
over-the-counter market. In the over-the-counter market, securities are
generally traded on a "net" basis with dealers acting as principal for their
own accounts without a stated commission, although the price of the security
usually includes a profit to the dealer. The Fund also expects that securities
will be purchased at times in underwritten offerings where the price includes a
fixed amount of compensation, generally referred to as the underwriter's
concession or discount. On occasion, the Fund may also purchase certain money
market instruments directly from an issuer, in which case no commissions or
discounts are paid.

During the fiscal years ended October 31, 1996, 1997 and 1998, the Fund
paid no brokerage commissions.

B. COMMISSIONS

Pursuant to an order of the SEC, the Fund may effect principal
transactions in certain money market instruments with Dean Witter Reynolds. The
Fund will limit its transactions with Dean Witter Reynolds to U.S. Government
and government agency securities, bank money instruments (i.e., certificates of
deposit and bankers' acceptances) and commercial paper. The transactions will
be effected with Dean Witter Reynolds only when the price available from Dean
Witter Reynolds is better than that available from other dealers.

During the fiscal years ended January 31, 1997, 1998 and 1999, the Fund
did not effect any principal transactions with Dean Witter Reynolds.

Consistent with the policy described above, brokerage transactions in
securities listed on exchanges or admitted to unlisted trading privileges may
be effected through Dean Witter Reynolds, Morgan Stanley & Co. and other
affiliated brokers and dealers. In order for an affiliated broker or dealer to
effect any portfolio transactions on an exchange for the Fund, the commissions,
fees or other remuneration received by the affiliated broker or dealer must be
reasonable and fair compared to the commissions, fees or other remuneration
paid to other brokers in connection with comparable transactions involving
similar securities being purchased or sold on an exchange during a comparable
period of time. This standard would allow the affiliated broker or dealer to
receive no more than the remuneration which would be expected to be received by
an unaffiliated broker in a commensurate arm's-length transaction. Furthermore,
the Trustees, including the Independent Trustees, have adopted procedures which
are reasonably designed to provide that any commissions, fees or other
remuneration paid to an affiliated broker or dealer are consistent with the
foregoing standard. The Fund does not reduce the management fee it pays to the
Investment Manager by any amount of the brokerage commissions it may pay to an
affiliated broker or dealer.

C. BROKERAGE SELECTION

The policy of the Fund regarding purchases and sales of securities for its
portfolio is that primary consideration will be given to obtaining the most
favorable prices and efficient executions of transactions.

In seeking to implement the Fund's policies, the Investment Manager and
the Sub-Advisor effect transactions with those brokers and dealers who the
Investment Manager and/or Sub-Advisor believes provide the most favorable
prices and are capable of providing efficient executions. If the Investment
Manager and/or Sub-Advisor believes the prices and executions are obtainable
from more than one broker or dealer, it may give consideration to placing
portfolio transactions with those brokers and

26
<PAGE>

dealers who also furnish research and other services to the Fund or the
Investment Manager and the Sub-Advisor. The services may include, but are not
limited to, any one or more of the following: information as to the
availability of securities for purchase or sale; statistical or factual
information or opinions pertaining to investment; wire services; and appraisals
or evaluations of portfolio securities. The information and services received
by the Investment Manager and/or Sub-Advisor from brokers and dealers may be of
benefit to the Investment Manager and/or Sub-Advisor in the management of
accounts of some of their other clients and may not in all cases benefit the
Fund directly.

The Investment Manager and the Sub-Advisor currently serve as investment
advisors to a number of clients, including other investment companies, and may
in the future act as investment manager or advisor to others. It is the
practice of the Investment Manager and the Sub-Advisor to cause purchase and
sale transactions to be allocated among the Fund and others whose assets they
manage in such manner as they deem equitable. In making such allocations among
the Fund and other client accounts, various factors may be considered,
including the respective investment objectives, the relative size of portfolio
holdings of the same or comparable securities, the availability of cash for
investment, the size of investment commitments generally held and the opinions
of the persons responsible for managing the portfolios of the Fund and other
client accounts. In the case of certain initial and secondary public offerings,
the Investment Manager utilizes a pro rata allocation process based on the size
of the funds involved and the number of shares available from the public
offering.

D. DIRECTED BROKERAGE

During the fiscal year ended October 31, 1998, the Fund did not pay any
brokerage commissions to brokers because of research services provided.

E. REGULAR BROKER-DEALERS

During the fiscal year ended October 31, 1998, the Fund did not purchase
securities issued by brokers or dealers that were among the ten brokers or the
ten dealers that executed transactions for or with the Fund in the largest
dollar amounts during the year.

VII. CAPITAL STOCK AND OTHER SECURITIES
- --------------------------------------------------------------------------------

The shareholders of the Fund are entitled to a full vote for each full
share of beneficial interest held. The Fund is authorized to issue an unlimited
number of shares of beneficial interest. All shares of beneficial interest of
the Fund are of $0.01 par value and are equal as to earnings, assets and voting
privileges.

The Fund's Declaration of Trust permits the Trustees to authorize the
creation of additional series of shares (the proceeds of which would be
invested in separate, independently managed portfolios) and additional Classes
of shares within any series. The Trustees have not presently authorized any
such additional series or Classes of shares other than as set forth in the
Prospectus.

The Fund is not required to hold annual meetings of shareholders and in
ordinary circumstances the Fund does not intend to hold such meetings. The
Trustees may call special meetings of shareholders for action by shareholder
vote as may be required by the Investment Company Act or the Declaration of
Trust. Under certain circumstances, the Trustees may be removed by action of
the Trustees or by the shareholders.

Under Massachusetts law, shareholders of a business trust may, under
certain limited circumstances, be held personally liable as partners for the
obligations of the Fund. However, the Declaration of Trust contains an express
disclaimer of shareholder liability for acts or obligations of the Fund,
requires that notice of such Fund obligations include such disclaimer, and
provides for indemnification out of the Fund's property for any shareholder
held personally liable for the obligations of the Fund. Thus, the risk of a
shareholder incurring financial loss on account of shareholder liability is
limited to circumstances in which the Fund itself would be unable to meet its
obligations. Given the above limitations on shareholder personal liability, and
the nature of the Fund's assets and operations, the possibility of the Fund
being unable to meet its obligations is remote and thus, in the opinion of
Massachusetts counsel to the Fund, the risk to Fund shareholders of personal
liability is remote.

27
<PAGE>

All of the Trustees have been elected by the shareholders of the Fund,
most recently at a Special Meeting of Shareholders held on June 8, 1999. The
Trustees themselves have the power to alter the number and the terms of office
of the Trustees (as provided for in the Declaration of Trust), and they may at
any time lengthen or shorten their own terms or make their terms of unlimited
duration and appoint their own successors, provided that always at least a
majority of the Trustees has been elected by the shareholders of the Fund.

VIII. PURCHASE, REDEMPTION AND PRICING OF SHARES
- --------------------------------------------------------------------------------

A. PURCHASE/REDEMPTION OF SHARES

Information concerning how Fund shares are offered to the public (and how
they are redeemed and exchanged) is provided in the Fund's Prospectus.

TRANSFER AGENT AS AGENT. With respect to the redemption or repurchase of
Fund shares, the application of proceeds to the purchase of new shares in the
Fund or any other Morgan Stanley Dean Witter Fund and the general
administration of the exchange privilege, the Transfer Agent acts as agent for
the Distributor and for the shareholder's authorized broker-dealer, if any, in
the performance of such functions. With respect to exchanges, redemptions or
repurchases, the Transfer Agent shall be liable for its own negligence and not
for the default or negligence of its correspondents or for losses in transit.
The Fund shall not be liable for any default or negligence of the Transfer
Agent, the Distributor or any authorized broker-dealer.

The Distributor and any authorized broker-dealer have appointed the
Transfer Agent to act as their agent in connection with the application of
proceeds of any redemption of Fund shares to the purchase of shares of any
other continuously offered Morgan Stanley Dean Witter Fund and the general
administration of the exchange privilege. No commission or discounts will be
paid to the Distributor or any authorized broker-dealer for any transaction
pursuant to the exchange privilege.

B. OFFERING PRICE

The price of Fund shares, called "net asset value," is based on the value
of the Fund's portfolio securities. Net asset value per share of each Class is
calculated by dividing the value of the portion of the Fund's securities and
other assets, less the liabilities by the number of shares outstanding.

In the calculation of the Fund's net asset value all portfolio securities
for which over-the-counter market quotations are readily available are valued
at the latest bid price. When market quotations are not readily available,
including circumstances under which it is determined by the Investment Manager
or the Sub-Advisor that sale or bid prices are not reflective of a security's
market value, portfolio securities are valued at their fair value as determined
in good faith under procedures established by and under the general supervision
of the Fund's Trustees. For valuation purposes, quotations of foreign portfolio
securities, other assets and liabilities and forward contracts stated in
foreign currency are translated into U.S. dollar equivalents at the prevailing
market rates prior to the close of the New York Stock Exchange.

Short-term debt securities with remaining maturities of sixty days or less
at the time of purchase are valued at amortized cost, unless the Trustees
determine such does not reflect the securities' market value, in which case
these securities will be valued at their fair value as determined by the
Trustees.

Certain of the Fund's portfolio securities may be valued by an outside
pricing service approved by the Fund's Trustees. The pricing service may
utilize a matrix system incorporating security quality, maturity and coupon as
the evaluation model parameters, and/or research evaluations by its staff,
including review of broker-dealer market price quotations in determining what
it believes is the fair valuation of the portfolio securities valued by such
pricing service.

Generally, trading in foreign securities, as well as corporate bonds, U.S.
Government securities and money market instruments, is substantially completed
each day at various times prior to the close of the New York Stock Exchange.
The values of such securities used in computing the net asset value of the
Fund's shares are determined as of such times. Foreign currency exchange rates
are also generally determined prior to the close of the New York Stock
Exchange. Occasionally, events which may affect

28
<PAGE>

the values of such securities and such exchange rates may occur between the
times at which they are determined and the close of the New York Stock Exchange
and will therefore not be reflected in the computation of the Fund's net asset
value. If events that may affect the value of such securities occur during such
period, then these securities may be valued at their fair value as determined
in good faith under procedures established by and under the supervision of the
Trustees.

IX. TAXATION OF THE FUND AND SHAREHOLDERS
- --------------------------------------------------------------------------------

The Fund generally will make two basic types of distributions: ordinary
dividends and long-term capital gain distributions. These two types of
distributions are reported differently on a shareholder's income tax return and
they are also subject to different rates of tax. The tax treatment of the
investment activities of the Fund will affect the amount and timing and
character of the distributions made by the Fund. Tax issues relating to the
Fund are not generally a consideration for shareholders such as tax exempt
entities and tax-advantaged retirement vehicles such as an IRA or 401(k) plan.
Shareholders are urged to consult their own tax professionals regarding
specific questions as to federal, state or local taxes.

INVESTMENT COMPANY TAXATION. The Fund intends to remain qualified as a
regulated investment company under Subchapter M of the Internal Revenue Code of
1986. As such, the Fund will not be subject to federal income tax on its net
investment income and capital gains, if any, to the extent that it distributes
such income and capital gains to its shareholders.

The Fund generally intends to distribute sufficient income and gains so
that the Fund will not pay corporate income tax on its earnings. The Fund also
generally intends to distribute to its shareholders in each calendar year a
sufficient amount of ordinary income and capital gains to avoid the imposition
of a 4% excise tax. However, the Fund may instead determine to retain all or
part of any net long-term capital gains in any year for reinvestment. In such
event, the Fund will pay federal income tax (and possibly excise tax) on such
retained gains.

Gains or losses on sales of securities by the Fund will be long-term
capital gains or losses if the securities have a tax holding period of more
than one year. Gains or losses on the sale of securities with a tax holding
period of one year or less will be short-term gains or losses.

Under certain tax rules, the Fund may be required to accrue a portion of
any discount at which certain securities are purchased as income each year even
though the Fund receives no payments in cash on the security during the year.
To the extent that the Fund invests in such securities, it would be required to
pay out such accrued discount as an income distribution in each year in order
to avoid taxation at the Fund level. Such distributions will be made from the
available cash of the Fund or by liquidation of portfolio securities if
necessary. If a distribution of cash necessitates the liquidation of portfolio
securities, the Investment Manager and/or Sub-Advisor will select which
securities to sell. The Fund may realize a gain or loss from such sales. In the
event the Fund realizes net capital gains from such transactions, its
shareholders may receive a larger capital gain distribution, if any, than they
would in the absence of such transactions.

TAXATION OF DIVIDENDS AND DISTRIBUTIONS. Shareholders normally will have
to pay federal income taxes, and any state and/or local income taxes, on the
dividends and other distributions they receive from the Fund. Such dividends
and distributions, to the extent that they are derived from net investment
income or short-term capital gains, are taxable to the shareholder as ordinary
income regardless of whether the shareholder receives such payments in
additional shares or in cash.

Distributions of net long-term capital gains, if any, are taxable to
shareholders as long-term capital gains regardless of how long a shareholder
has held the Fund's shares and regardless of whether the distribution is
received in additional shares or in cash. The Taxpayer Relief Act of 1997
reduced the maximum tax on long-term capital gains applicable to individuals
from 28% to 20%.

Shareholders are generally taxed on any ordinary dividend or capital gain
distributions from the Fund in the year they are actually distributed. However,
if any such dividends or distributions are declared in October, November or
December and paid in January then such amounts will be treated for tax purposes
as received by the shareholders on December 31, to shareholders of record of
such month.

29
<PAGE>

Subject to certain exceptions, a corporate shareholder may be eligible for
a 70% dividends received deduction to the extent that the Fund earns and
distributes qualifying dividends from its investments. Distributions of net
capital gains by the Fund will not be eligible for the dividends received
deduction.

Shareholders who are not citizens or residents of the United States and
certain foreign entities may be subject to withholding of United States tax on
distributions made by the Fund of investment income and short term capital
gains.

After the end of each calendar year, shareholders will be sent full
information on their dividends and capital gain distributions for tax purposes,
including the portion taxable as ordinary income, the portion taxable as
long-term capital gains and the amount of any dividends eligible for the
federal dividends received deduction for corporations.

PURCHASES AND REDEMPTIONS AND EXCHANGES OF FUND SHARES. Any dividend or
capital gains distribution received by a shareholder from any investment
company will have the effect of reducing the net asset value of the
shareholder's stock in that company by the exact amount of the dividend or
capital gains distribution. Furthermore, such dividends and capital gains
distributions are subject to federal income taxes. If the net asset value of
the shares should be reduced below a shareholder's cost as a result of the
payment of dividends or the distribution of realized long-term capital gains,
such payment or distribution would be in part a return of the shareholder's
investment but nonetheless would be taxable to the shareholder. Therefore, an
investor should consider the tax implications of purchasing Fund shares
immediately prior to a distribution record date.

In general, a sale of shares results in capital gain or loss, and for
individual shareholders, is taxable at a federal rate dependent upon the length
of time the shares were held. A redemption of a shareholder's Fund shares is
normally treated as a sale for tax purposes. Fund shares held for a period of
one year or less will, for tax purposes, generally result in short-term gains
or losses and those held for more than one year generally result in long-term
gain or loss. Any loss realized by shareholders upon a redemption of shares
within six months of the date of their purchase will be treated as a long-term
capital loss to the extent of any distributions of net long-term capital gains
with respect to such shares during the six-month period.

Gain or loss on the sale or redemption of shares in the Fund is measured
by the difference between the amount received and the tax basis of the shares.
Shareholders should keep records of investments made (including shares acquired
through reinvestment of dividends and distributions) so they can compute the
tax basis of their shares. Under certain circumstances a shareholder may
compute and use an average cost basis in determining the gain or loss on the
sale or redemption of shares.

Exchanges of Fund shares for shares of any other continuously offered
Morgan Stanley Dean Witter Fund are also subject to similar tax treatment. Such
an exchange is treated for tax purposes as a sale of the original shares in the
first fund, followed by the purchase of shares in the second fund.

If a shareholder realizes a loss on the redemption or exchange of a fund's
shares and reinvests in that fund's shares within 30 days before or after the
redemption or exchange, the transactions may be subject to the "wash sale"
rules, resulting in a postponement of the recognition of such loss for tax
purposes.

X. UNDERWRITERS
- --------------------------------------------------------------------------------

The Fund's shares are offered to the public on a continuous basis. The
Distributor, as the principal underwriter of the shares, has certain
obligations under the Distribution Agreement concerning the distribution of the
shares. These obligations and the compensation the Distributor receives are
described above in the sections titled "Principal Underwriter" and "Rule 12b-1
Plans".

XI. CALCULATION OF PERFORMANCE DATA
- --------------------------------------------------------------------------------

From time to time the Fund may quote its "yield" and/or its "total return"
in advertisements and sales literature.

30
<PAGE>

Yield is calculated for any 30-day period as follows: the amount of
interest income for each security in the Fund's portfolio is determined as
described below; the total for the entire portfolio constitutes the Fund's
gross income for the period. Expenses accrued during the period are subtracted
to arrive at "net investment income." The resulting amount is divided by the
product of the maximum offering price per share on the last day of the period
(reduced by any undeclared earned income per share that is expected to be
declared shortly after the end of the period) multiplied by the average number
of Fund shares outstanding during the period that were entitled to dividends.
This amount is added to 1 and raised to the sixth power. 1 is then subtracted
from the result and the difference is multiplied by 2 to arrive at the
annualized yield.

To determine interest income from debt obligations, a yield-to-maturity,
expressed as a percentage, is determined for obligations held at the beginning
of the period, based on the current market value of the security plus accrued
interest, generally as of the end of the month preceding the 30-day period, or,
for obligations purchased during the period, based on the cost of the security
(including accrued interest). The yield-to-maturity is multiplied by the market
value (plus accrued interest) for each security and the result is divided by
360 and multiplied by 30 days or the number of days the security was held
during the period, if less. Modifications are made for determining
yield-to-maturity on certain tax-exempt securities. For the 30-day period ended
October 31, 1998, the Fund's yield, calculated pursuant to the formula
described above was 8.95%.

The Fund's "average annual total return" represents an annualization of
the Fund's total return over a particular period and is computed by finding the
annual percentage rate which will result in the ending redeemable value of a
hypothetical $1,000 investment made at the beginning of a one, five or ten year
period, or for the period from the date of commencement of the Fund's
operations, if shorter than any of the foregoing. For the purpose of this
calculation, it is assumed that all dividends and distributions are reinvested.
The formula for computing the average annual total return involves a percentage
obtained by dividing the ending redeemable value by the amount of the initial
investment (which is reduced by the initial sales charge), taking a root of the
quotient (where the root is equivalent to the number of years in the period)
and subtracting 1 from the result. The average annual total return of the Fund
for the fiscal year ended October 31, 1998 and for the period July 31, 1992
(commencement of operations) through October 31, 1998 was 5.13% and 4.13%,
respectively.

In addition, the Fund may compute its aggregate total return for specified
periods by determining the aggregate percentage rate which will result in the
ending value of a hypothetical $1,000 investment made at the beginning of the
period. For the purpose of this calculation, it is assumed that all dividends
and distributions are reinvested. The formula for computing aggregate total
return involves a percentage obtained by dividing the ending value (without
reduction for any sales charge) by the initial $1,000 investment and
subtracting 1 from the result. Based on the foregoing calculation, the Fund's
total return for the fiscal year ended October 31, 1998 and for the period July
31, 1992 (commencement of operations) through October 31, 1998 was 5.13% and
28.81%, respectively.

The Fund may also advertise the growth of hypothetical investments of
$10,000, $50,000 and $100,000 in shares of the Fund by adding 1 to the Fund's
aggregate total return to date and multiplying $10,000, $50,000 or $100,000.
Investments of $10,000, $50,000 and $100,000 in the Fund since inception would
have grown to $12,881, $64,405, and $128,810, respectively, at October 31,
1998.

The Fund from time to time may also advertise its performance relative to
certain performance rankings and indexes compiled by independent organizations.

XII. FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------

EXPERTS. The financial statements of the Fund for the fiscal year ended
Ocrober 31, 1998 included in this Statement of Additional Information and
incorporated by reference in the Prospectus have been so included and
incorporated in reliance on the report of ,
independent accountants, given on the authority of said firm as experts in
auditing and accounting.

31
<PAGE>

* * * * *

This Statement of Additional Information and the Prospectus do not contain
all of the information set forth in the Registration Statement the Fund has
filed with the SEC. The complete Registration Statement may be obtained from
the SEC.

<PAGE>

TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST

PART C OTHER INFORMATION

Item 23. Exhibits

2. Amended and Restated By-Laws of the Registrant dated May 1, 1999.

14. Financial Data Schedule - To be filed by Amendment.

All other exhibits were previously filed via EDGAR and are hereby incorporated
by reference.

Item 24. Persons Controlled by or Under Common Control With the Fund

None

Item 25. Indemnification.

Pursuant to Section 5.3 of the Registrant's Declaration of Trust and under
Section 4.8 of the Registrant's By-Laws, the indemnification of the Registrant's
trustees, officers, employees and agents is permitted if it is determined that
they acted under the belief that their actions were in or not opposed to the
best interest of the Registrant, and, with respect to any criminal proceeding,
they had reasonable cause to believe their conduct was not unlawful. In
addition, indemnification is permitted only if it is determined that the actions
in question did not render them liable by reason of willful misfeasance, bad
faith or gross negligence in the performance of their duties or by reason of
reckless disregard of their obligations and duties to the Registrant. Trustees,
officers, employees and agents will be indemnified for the expense of litigation
if it is determined that they are entitled to indemnification against any
liability established in such litigation. The Registrant may also advance money
for these expenses provided that they give their undertakings to repay the
Registrant unless their conduct is later determined to permit indemnification.

Pursuant to Section 5.2 of the Registrant's Declaration of
Trust and paragraph 8 of the Registrant's Management and Advisory Agreements,
none of the Manager, the Adviser or any trustee, officer, employee or agent of
the Registrant shall be liable for any action or failure to act, except in the
case of bad faith, willful misfeasance, gross negligence or reckless disregard
of duties to the Registrant.

Insofar as indemnification for liabilities arising under the
Securities Act of 1933 (the "Act") may be permitted to trustees, officers and
controlling persons of the Registrant pursuant to the foregoing provisions or
otherwise, the Registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Act and is, therefore, unenforceable. In the event that a claim
for indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a trustee, officer, or controlling
person of the Registrant in connection with the successful defense of any
action, suit or proceeding) is asserted against the Registrant by such trustee,
officer or controlling person in connection with the shares being registered,
the Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Act, and will be governed by the final adjudication of such
issue.

The Registrant hereby undertakes that it will apply the
indemnification provision of its by-laws in a manner consistent with Release
11330 of the Securities and Exchange Commission under the

<PAGE>

Investment Company Act of 1940, so long as the interpretation of Sections 17(h)
and 17(i) of such Act remains in effect.

Registrant, in conjunction with the Manager, Registrant's Trustees, and
other registered investment management companies managed by the Manager,
maintains insurance on behalf of any person who is or was a Trustee, officer,
employee, or agent of Registrant, or who is or was serving at the request of
Registrant as a trustee, director, officer, employee or agent of another trust
or corporation, against any liability asserted against him and incurred by him
or arising out of his position. However, in no event will Registrant maintain
insurance to indemnify any such person for any act for which Registrant itself
is not permitted to indemnify him.

Item 26. Business and Other Connections of Investment Adviser.

The TCW Funds Management, Inc. ("TCW") is a 100% owned subsidiary of The
TCW Group, Inc., a Nevada corporation. TCW presently serves as investment
adviser to: (1) TCW/DW North American Government Income Trust, an open-end,
non-diversified management company; (2) TCW/DW Income and Growth Fund, an
open-end, non-diversified management company; (3) TCW/DW Latin American Growth
Fund, an open-end, non-diversified management company; (4) TCW/DW Small Cap
Growth Fund, an open-end non-diversified management company; (5) TCW/DW Term
Trust 2000, a closed-end, diversified management company; (6) TCW/DW Term Trust
2002, a closed-end diversified management company; (7) TCW/DW Term Trust 2003, a
closed-end diversified management company; (8) TCW/DW Emerging Markets
Opportunities Trust, an open-end, non-diversified management company; (9) TCW/DW
Total Return Trust, an open-end non-diversified management investment company;
(10) TCW/DW Mid-Cap Equity Trust, an open-end, diversified management investment
company; and (11) TCW/DW Global Telecom Trust, an open-end diversified
management investment company. TCW also serves as investment adviser or
sub-adviser to other investment companies, including foreign investment
companies. The list required by this Item 26 of the officers and directors of
TCW together with information as to any other business, profession, vocation or
employment of a substantive nature engaged in by TCW and such officers and
directors during the past two years, is incorporated by reference to Form ADV
(File No. 801-29075) filed by TCW pursuant to the Investment Advisers Act.

Item 27. Principal Underwriters

(a) Morgan Stanley Dean Witter Distributors Inc. ("MSDW Distributors"), a
Delaware corporation, is the principal underwriter of the Registrant.
MSDW Distributors is also the principal underwriter of the following
investment companies:

(1) Active Assets California Tax-Free Trust
(2) Active Assets Government Securities Trust
(3) Active Assets Money Trust
(4) Active Assets Tax-Free Trust
(5) Morgan Stanley Dean Witter Aggressive Equity Fund
(6) Morgan Stanley Dean Witter American Opportunities Fund
(7) Morgan Stanley Dean Witter Balanced Growth Fund
(8) Morgan Stanley Dean Witter Balanced Income Fund
(9) Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
(10) Morgan Stanley Dean Witter California Tax-Free Income Fund
(11) Morgan Stanley Dean Witter Capital Growth Securities

2
<PAGE>

(12) Morgan Stanley Dean Witter Competitive Edge Fund, "Best Ideas Portfolio"
(13) Morgan Stanley Dean Witter Convertible Securities Trust
(14) Morgan Stanley Dean Witter Developing Growth Securities Trust
(15) Morgan Stanley Dean Witter Diversified Income Trust
(16) Morgan Stanley Dean Witter Dividend Growth Securities Inc.
(17) Morgan Stanley Dean Witter Equity Fund
(18) Morgan Stanley Dean Witter European Growth Fund Inc.
(19) Morgan Stanley Dean Witter Federal Securities Trust
(20) Morgan Stanley Dean Witter Financial Services Trust
(21) Morgan Stanley Dean Witter Fund of Funds
(22) Morgan Stanley Dean Witter Global Dividend Growth Securities
(23) Morgan Stanley Dean Witter Global Utilities Fund
(24) Morgan Stanley Dean Witter Growth Fund
(25) Morgan Stanley Dean Witter Hawaii Municipal Trust
(26) Morgan Stanley Dean Witter Health Sciences Trust
(27) Morgan Stanley Dean Witter High Yield Securities Inc.
(28) Morgan Stanley Dean Witter Income Builder Fund
(29) Morgan Stanley Dean Witter Information Fund
(30) Morgan Stanley Dean Witter Intermediate Income Securities
(31) Morgan Stanley Dean Witter International SmallCap Fund
(32) Morgan Stanley Dean Witter Japan Fund
(33) Morgan Stanley Dean Witter Limited Term Municipal Trust
(34) Morgan Stanley Dean Witter Liquid Asset Fund Inc.
(35) Morgan Stanley Dean Witter Market Leader Trust
(36) Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
(37) Morgan Stanley Dean Witter Mid-Cap Growth Fund
(38) Morgan Stanley Dean Witter Multi-State Municipal Series Trust
(39) Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
(40) Morgan Stanley Dean Witter New York Municipal Money Market Trust
(41) Morgan Stanley Dean Witter New York Tax-Free Income Fund
(42) Morgan Stanley Dean Witter Pacific Growth Fund Inc.
(43) Morgan Stanley Dean Witter Precious Metals and Minerals Trust
(44) Morgan Stanley Dean Witter Prime Income Trust
(45) Morgan Stanley Dean Witter Real Estate Fund
(46) Morgan Stanley Dean Witter S&P 500 Index Fund
(47) Morgan Stanley Dean Witter S&P 500 Select Fund
(48) Morgan Stanley Dean Witter Short-Term Bond Fund
(49) Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
(50) Morgan Stanley Dean Witter Special Value Fund
(51) Morgan Stanley Dean Witter Strategist Fund
(52) Morgan Stanley Dean Witter Tax-Exempt Securities Trust
(53) Morgan Stanley Dean Witter Tax-Free Daily Income Trust
(54) Morgan Stanley Dean Witter U.S. Government Money Market Trust
(55) Morgan Stanley Dean Witter U.S. Government Securities Trust
(56) Morgan Stanley Dean Witter Utilities Fund
(57) Morgan Stanley Dean Witter Value-Added Market Series
(58) Morgan Stanley Dean Witter Value Fund
(59) Morgan Stanley Dean Witter Variable Investment Series
(60) Morgan Stanley Dean Witter World Wide Income Trust
(1) TCW/DW Emerging Markets Opportunities Trust

3
<PAGE>

(2) TCW/DW Global Telecom Trust
(3) TCW/DW Income and Growth
(4) TCW/DW Latin American Growth Fund
(5) TCW/DW Mid-Cap Equity Trust
(6) TCW/DW North American Government Income Trust
(7) TCW/DW Small Cap Growth Fund
(8) TCW/DW Total Return Trust

(b) The following information is given regarding directors and officers of MSDW
Distributors not listed in Item 26 above. The principal address of MSDW
Distributors is Two World Trade Center, New York, New York 10048.

POSITION AND OFFICE WITH DISTRIBUTORS
NAME AND THE REGISTRANT
- ---- -------------------------------------------
Mitchell M. Merin Chairman, Chief Executive Officer and
Director of MSDW Distributors and President
of the Registrant.

Christine A. Edwards Executive Vice President, Secretary,
Director and Chief Legal Officer of MSDW
Distributors.

Philip J. Purcell Director of MSDW Distributors.

James F. Higgins Director of MSDW Distributors.

John Schaeffer Director of MSDW Distributors.

John B. Kemp III President of MSDW Distributors.

Robert S. Giambrone Senior Vice President of MSDW Distributors
and Vice President of the Registrant.

Barry Fink Senior Vice President, Assistant General
Counsel and Assistant Secretary of MSDW
Distributors and Vice President, Secretary
and General Counsel of the Registrant.

Frederick K. Kubler Senior Vice President, Assistant Secretary
and Chief Compliance Officer of MSDW
Distributors.

Charles Vidala Senior Vice President and Financial
Principal of MSDW Distributors.

Michael T. Gregg Vice President and Assistant Secretary of
MSDW Distributors.

Thomas F. Caloia Assistant Treasurer of MSDW Distributors and
Treasurer of the Registrant.

Michael Interrante Assistant Treasurer of MSDW Distributors.

4
<PAGE>

Item 28. Location of Accounts and Records

All accounts, books and other documents required to be maintained by
Section 31(a) of the Investment Company Act of 1940 and the Rules thereunder are
maintained by the Investment Manager at its offices, except records relating to
holders of shares issued by the Registrant, which are maintained by the
Registrant's Transfer Agent, at its place of business as shown in the
prospectus.

Item 29. Management Services

Registrant is not a party to any such management-related service
contract.

Item 30. Undertakings

None

<PAGE>

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant certifies that it has duly caused
this Post-Effective Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York
and State of New York on the 26th day of April, 1999.

TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST

By: /s/ Barry Fink
--------------------------------
Barry Fink
Vice President and Secretary

Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 8 has been signed below by the following persons in
the capacities and on the dates indicated.

SIGNATURES TITLE DATE
---------- ----- ----
<S> <C> <C>
(1) Principal Executive Officer Chief Executive Officer,
Trustee and Chairman 4/26/99
By: /s/ Charles A. Fiumefreddo
------------------------------
Charles A. Fiumefreddo

(2) Principal Financial Officer Treasurer and Principal
Accounting Officer 4/26/99
By: /s/ Thomas F. Caloia
------------------------------
Thomas F. Caloia

(3) Majority of the Trustees

Charles A. Fiumefreddo (Chairman)
Thomas E. Larkin, Jr.
Richard M. DeMartini
Marc. I. Stern

By: /s/ Barry Fink 4/26/99
------------------------------
Barry Fink
Attorney-in-Fact

John C. Argue Michael E. Nugent
Manuel H. Johnson John L. Schroeder

By: /s/ David M. Butowsky 4/26/99
------------------------------
David M. Butowsky
Attorney-in-Fact
</TABLE>

<PAGE>

TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST
EXHIBIT INDEX

2. Amended and Restated By-Laws of the Registrant dated May 1, 1999.

14. Financial Data Schedule - To be filed by Amendment.

<PAGE>

BY-LAWS
OF
TCW/DW NORTH AMERICAN GOVERNMENT INCOME TRUST
AMENDED AND RESTATED AS OF MAY 1, 1999

ARTICLE I
DEFINITIONS

The terms "Commission," "Declaration," "Distributor," "Investment
Adviser," "Majority Shareholder Vote," "1940 Act," "Shareholder," "Shares,"
"Transfer Agent," "Trust," "Trust Property," and "Trustees" have the
respective meanings given them in the Declaration of Trust of TCW/DW North
American Government Income Trust dated February 19, 1992, as amended from
time to time.

ARTICLE II
OFFICES

SECTION 2.1. Principal Office. Until changed by the Trustees, the
principal office of the Trust in the Commonwealth of Massachusetts shall be
in the City of Boston, County of Suffolk.

SECTION 2.2. Other Offices. In addition to its principal office in the
Commonwealth of Massachusetts, the Trust may have an office or offices in the
City of New York, State of New York, and at such other places within and
without the Commonwealth as the Trustees may from time to time designate or
the business of the Trust may require.

ARTICLE III
SHAREHOLDERS' MEETINGS

SECTION 3.1. Place of Meetings. Meetings of Shareholders shall be held at
such place, within or without the Commonwealth of Massachusetts, as may be
designated from time to time by the Trustees.

SECTION 3.2. Meetings. Meetings of Shareholders of the Trust shall be held
whenever called by the Trustees or the President of the Trust and whenever
election of a Trustee or Trustees by Shareholders is required by the
provisions of Section 16(a) of the 1940 Act, for that purpose. Meetings of
Shareholders shall also be called by the Secretary upon the written request
of the holders of Shares entitled to vote not less than twenty-five percent
(25%) of all the votes entitled to be cast at such meeting, except to the
extent otherwise required by Section 16(c) of the 1940 Act, otherwise
required by Section 16(c) of the 1940 Act and to the extent required by the
corporate or, as made applicable to the Trust by the provisions of Section
2.3 of the Declaration. Such request shall state the purpose or purposes of
such meeting and the matters proposed to be acted on thereat. Except to the
extent otherwise required by Section 16(c) of the 1940 Act, as made
applicable to the Trust by the provisions of Section 2.3 of the Declaration,
the Secretary shall inform such Shareholders of the reasonable estimated cost
of preparing and mailing such notice of the meeting, and upon payment to the
Trust of such costs, the Secretary shall give notice stating the purpose or
purposes of the meeting to all entitled to vote at such meeting. No meeting
need be called upon the request of the holders of Shares entitled to cast
less than a majority of all votes entitled to be cast at such meeting, to
consider any matter which is substantially the same as a matter voted upon at
any meeting of Shareholders held during the preceding twelve months.

SECTION 3.3. Notice of Meetings. Written or printed notice of every
Shareholders' meeting stating the place, date, and purpose or purposes
thereof, shall be given by the Secretary not less than ten (10) nor more than
ninety (90) days before such meeting to each Shareholder entitled to vote at
such meeting. Such notice shall be deemed to be given when deposited in the
United States mail, postage prepaid, directed to the Shareholder at his
address as it appears on the records of the Trust.

SECTION 3.4. Quorum and Adjournment of Meetings. Except as otherwise
provided by law, by the Declaration or by these By-Laws, at all meetings of
Shareholders, the holders of a majority of the Shares

1
<PAGE>

issued and outstanding and entitled to vote thereat, present in person or
represented by proxy, shall be requisite and shall constitute a quorum for
the transaction of business. In the absence of a quorum, the Shareholders
present or represented by proxy and entitled to vote thereat shall have the
power to adjourn the meeting from time to time. The Shareholders present in
person or represented by proxy at any meeting and entitled to vote thereat
also shall have the power to adjourn the meeting from time to time if the
vote required to approve or reject any proposal described in the original
notice of such meeting is not obtained (with proxies being voted for or
against adjournment consistent with the votes for and against the proposal
for which the required vote has not been obtained). The affirmative vote of
the holders of a majority of the Shares then present in person or represented
by proxy shall be required to adjourn any meeting. Any adjourned meeting may
be reconvened without further notice or change in record date. At any
reconvened meeting at which a quorum shall be present, any business may be
transacted that might have been transacted at the meeting as originally
called.

SECTION 3.5. Voting Rights, Proxies. At each meeting of Shareholders, each
holder of record of Shares entitled to vote thereat shall be entitled to one
vote in person or by proxy for each Share of beneficial interest of the Trust
and for the fractional portion of one vote for each fractional Share entitled
to vote so registered in his or her name on the records of the Trust on the
date fixed as the record date for the determination of Shareholders entitled
to vote at such meeting. Without limiting the manner in which a Shareholder
may authorize another person or persons to act for such Shareholder as proxy
pursuant hereto, the following shall constitute a valid means by which a
Shareholder may grant such authority:

(i) A Shareholder may execute a writing authorizing another person or
persons to act for such Shareholder as proxy. Execution may be
accomplished by the Shareholder or such Shareholder's authorized
officer, director, employee, attorney-in-fact or another agent signing
such writing or causing such person's signature to be affixed to such
writing by any reasonable means including, but not limited to, by
facsimile or telecopy signature. No written evidence of authority of a
Shareholder's authorized officer, director, employee, attorney-in-fact
or other agent shall be required; and

(ii) A Shareholder may authorize another person or persons to act for
such Shareholder as proxy by transmitting or authorizing the
transmission of a telegram or cablegram or by other means of
telephonic, electronic or computer transmission to the person who will
be the holder of the proxy or to a proxy solicitation firm, proxy
support service organization or like agent duly authorized by the
person who will be the holder of the proxy to receive such
transmission, provided that any such telegram or cablegram or other
means of telephonic, electronic or computer transmission must either
set forth or be submitted with information from which it can be
determined that the telegram, cablegram or other transmission was
authorized by the Shareholder.

No proxy shall be valid after eleven months from its date, unless otherwise
provided in the proxy. At all meetings of Shareholders, unless the voting is
conducted by inspectors, all questions relating to the qualification of
voters and the validity of proxies and the acceptance or rejection of votes
shall be decided by the chairman of the meeting. In determining whether a
telegram, cablegram or other electronic transmission is valid, the chairman
or inspector, as the case may be, shall specify the information upon which he
or she relied. Pursuant to a resolution of a majority of the Trustees,
proxies may be solicited in the name of one or more Trustees or Officers of
the Trust. Proxy solicitations may be made in writing or by using telephonic
or other electronic solicitation procedures that include appropriate methods
of verifying the identity of the Shareholder and confirming any instructions
given thereby.

SECTION 3.6. Vote Required. Except as otherwise provided by law, by the
Declaration of Trust, or by these By-Laws, at each meeting of Shareholders at
which a quorum is present, all matters shall be decided by Majority
Shareholder Vote.

SECTION 3.7. Inspectors of Election. In advance of any meeting of
Shareholders, the Trustees may appoint Inspectors of Election to act at the
meeting or any adjournment thereof. If Inspectors of Election are not so
appointed, the chairman of any meeting of Shareholders may, and on the
request of any Shareholder or his proxy shall, appoint Inspectors of Election
of the meeting. In case any person appointed as Inspector fails to appear or
fails or refuses to act, the vacancy may be filled by appointment

2
<PAGE>

made by the Trustees in advance of the convening of the meeting or at the
meeting by the person acting as chairman. The Inspectors of Election shall
determine the number of Shares outstanding, the Shares represented at the
meeting, the existence of a quorum, the authenticity, validity and effect of
proxies, shall receive votes, ballots or consents, shall hear and determine
all challenges and questions in any way arising in connection with the right
to vote, shall count and tabulate all votes or consents, determine the
results, and do such other acts as may be proper to conduct the election or
vote with fairness to all Shareholders. On request of the chairman of the
meeting, or of any Shareholder or his proxy, the Inspectors of Election shall
make a report in writing of any challenge or question or matter determined by
them and shall execute a certificate of any facts found by them.

SECTION 3.8. Inspection of Books and Records. Shareholders shall have such
rights and procedures of inspection of the books and records of the Trust as
are granted to Shareholders under Section 32 of the Business Corporation Law
of the Commonwealth of Massachusetts.

SECTION 3.9. Action by Shareholders Without Meeting. Except as otherwise
provided by law, the provisions of these By-Laws relating to notices and
meetings to the contrary notwithstanding, any action required or permitted to
be taken at any meeting of Shareholders may be taken without a meeting if a
majority of the Shareholders entitled to vote upon the action consent to the
action in writing and such consents are filed with the records of the Trust.
Such consent shall be treated for all purposes as a vote taken at a meeting
of Shareholders.

SECTION 3.10. Presence at Meetings. Presence at meetings of shareholders
requires physical attendance by the shareholder or his or her proxy at the
meeting site and does not encompass attendance by telephonic or other
electronic means.

ARTICLE IV
TRUSTEES

SECTION 4.1. Meetings of the Trustees. The Trustees may in their
discretion provide for regular or special meetings of the Trustees. Regular
meetings of the Trustees may be held at such time and place as shall be
determined from time to time by the Trustees without further notice. Special
meetings of the Trustees may be called at any time by the Chairman and shall
be called by the Chairman or the Secretary upon the written request of any
two (2) Trustees.

SECTION 4.2. Notice of Special Meetings. Written notice of special
meetings of the Trustees, stating the place, date and time thereof, shall be
given not less than two (2) days before such meeting to each Trustee,
personally, by telegram, by mail, or by leaving such notice at his place of
residence or usual place of business. If mailed, such notice shall be deemed
to be given when deposited in the United States mail, postage prepaid,
directed to the Trustee at his address as it appears on the records of the
Trust. Subject to the provisions of the 1940 Act, notice or waiver of notice
need not specify the purpose of any special meeting.

SECTION 4.3. Telephone Meetings. Subject to the provisions of the 1940
Act, any Trustee, or any member or members of any committee designated by the
Trustees, may participate in a meeting of the Trustees, or any such
committee, as the case may be, by means of a conference telephone or similar
communications equipment if all persons participating in the meeting can hear
each other at the same time. Participation in a meeting by these means
constitutes presence in person at the meeting.

SECTION 4.4. Quorum, Voting and Adjournment of Meetings. At all meetings
of the Trustees, a majority of the Trustees shall be requisite to and shall
constitute a quorum for the transaction of business. If a quorum is present,
the affirmative vote of a majority of the Trustees present shall be the act
of the Trustees, unless the concurrence of a greater proportion is expressly
required for such action by law, the Declaration or these By-Laws. If at any
meeting of the Trustees there be less than a quorum present, the Trustees
present thereat may adjourn the meeting from time to time, without notice
other than announcement at the meeting, until a quorum shall have been
obtained.

SECTION 4.5. Action by Trustees Without Meeting. The provisions of these
By-Laws covering notices and meetings to the contrary notwithstanding, and
except as required by law, any action required

3
<PAGE>

or permitted to be taken at any meeting of the Trustees may be taken without
a meeting if a consent in writing setting forth the action shall be signed by
all of the Trustees entitled to vote upon the action and such written consent
is filed with the minutes of proceedings of the Trustees.

SECTION 4.6. Expenses and Fees. Each Trustee may be allowed expenses, if
any, for attendance at each regular or special meeting of the Trustees, and
each Trustee who is not an officer or employee of the Trust or of its
investment manager or underwriter or of any corporate affiliate of any of
said persons shall receive for services rendered as a Trustee of the Trust
such compensation as may be fixed by the Trustees. Nothing herein contained
shall be construed to preclude any Trustee from serving the Trust in any
other capacity and receiving compensation therefor.

SECTION 4.7. Execution of Instruments and Documents and Signing of Checks
and Other Obligations and Transfers. All instruments, documents and other
papers shall be executed in the name and on behalf of the Trust and all
checks, notes, drafts and other obligations for the payment of money by the
Trust shall be signed, and all transfer of securities standing in the name of
the Trust shall be executed, by the Chairman, the President, any Vice
President or the Treasurer or by any one or more officers or agents of the
Trust as shall be designated for that purpose by vote of the Trustees;
notwithstanding the above, nothing in this Section 4.7 shall be deemed to
preclude the electronic authorization, by designated persons, of the Trust's
Custodian (as described herein in Section 9.1) to transfer assets of the
Trust, as provided for herein in Section 9.1.

SECTION 4.8. Indemnification of Trustees, Officers, Employees and
Agents. (a) The Trust shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending, or completed
action, suit or proceeding, whether civil, criminal, administrative or
investigative (other than an action by or in the right of the Trust) by
reason of the fact that he is or was a Trustee, officer, employee, or agent
of the Trust. The indemnification shall be against expenses, including
attorneys' fees, judgments, fines, and amounts paid in settlement, actually
and reasonably incurred by him in connection with the action, suit, or
proceeding, if he acted in good faith and in a manner he reasonably believed
to be in or not opposed to the best interests of the Trust, and, with respect
to any criminal action or proceeding, had no reasonable cause to believe his
conduct was unlawful. The termination of any action, suit or proceeding by
judgment, order, settlement, conviction, or upon a plea of nolo contendere or
its equivalent, shall not, of itself, create a presumption that the person
did not act in good faith and in a manner which he reasonably believed to be
in or not opposed to the best interests of the Trust, and, with respect to
any criminal action or proceeding, had reasonable cause to believe that his
conduct was unlawful.

(b) The Trust shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action
or suit by or on behalf of the Trust to obtain a judgment or decree in its
favor by reason of the fact that he is or was a Trustee, officer, employee,
or agent of the Trust. The indemnification shall be against expenses,
including attorneys' fees actually and reasonably incurred by him in
connection with the defense or settlement of the action or suit, if he acted
in good faith and in a manner he reasonably believed to be in or not opposed
to the best interests of the Trust; except that no indemnification shall be
made in respect of any claim, issue, or matter as to which the person has
been adjudged to be liable for negligence or misconduct in the performance of
his duty to the Trust, except to the extent that the court in which the
action or suit was brought, or a court of equity in the county in which the
Trust has its principal office, determines upon application that, despite the
adjudication of liability but in view of all circumstances of the case, the
person is fairly and reasonably entitled to indemnity for those expenses
which the court shall deem proper, provided such Trustee, officer, employee
or agent is not adjudged to be liable by reason of his willful misfeasance,
bad faith, gross negligence or reckless disregard of the duties involved in
the conduct of his office.

(c) To the extent that a Trustee, officer, employee, or agent of the Trust
has been successful on the merits or otherwise in defense of any action, suit
or proceeding referred to in subsection (a) or (b) or in defense of any
claim, issue or matter therein, he shall be indemnified against expenses,
including attorneys' fees, actually and reasonably incurred by him in
connection therewith.

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(d) (1) Unless a court orders otherwise, any indemnification under
subsections (a) or (b) of this section may be made by the Trust only as
authorized in the specific case after a determination that indemnification of
the Trustee, officer, employee, or agent is proper in the circumstances
because he has met the applicable standard of conduct set forth in
subsections (a) or (b).

(2) The determination shall be made:

(i) By the Trustees, by a majority vote of a quorum which consists of
Trustees who were not parties to the action, suit or proceeding; or

(ii) If the required quorum is not obtainable, or if a quorum of
disinterested Trustees so directs, by independent legal counsel in a
written opinion; or

(iii) By the Shareholders.

(3) Notwithstanding any provision of this Section 4.8, no person shall be
entitled to indemnification for any liability, whether or not there is an
adjudication of liability, arising by reason of willful misfeasance, bad
faith, gross negligence, or reckless disregard of duties as described in
Section 17(h) and (i) of the Investment Company Act of 1940 ("disabling
conduct"). A person shall be deemed not liable by reason of disabling
conduct if, either:

(i) a final decision on the merits is made by a court or other body
before whom the proceeding was brought that the person to be indemnified
("indemnitee") was not liable by reason of disabling conduct; or

(ii) in the absence of such a decision, a reasonable determination,
based upon a review of the facts, that the indemnitee was not liable by
reason of disabling conduct, is made by either--

(A) a majority of a quorum of Trustees who are neither "interested
persons" of the Trust, as defined in Section 2(a)(19) of the
Investment Company Act of 1940, nor parties to the action, suit or
proceeding, or

(B) an independent legal counsel in a written opinion.

(e) Expenses, including attorneys' fees, incurred by a Trustee, officer,
employee or agent of the Trust in defending a civil or criminal action, suit
or proceeding may be paid by the Trust in advance of the final disposition
thereof if:

(1) authorized in the specific case by the Trustees; and

(2) the Trust receives an undertaking by or on behalf of the Trustee,
officer, employee or agent of the Trust to repay the advance if it is not
ultimately determined that such person is entitled to be indemnified by
the Trust; and

(3) either, (i) such person provides a security for his undertaking, or

(ii) the Trust is insured against losses by reason of any lawful
advances, or

(iii) a determination, based on a review of readily available facts,
that there is reason to believe that such person ultimately will be found
entitled to indemnification, is made by either--

(A) a majority of a quorum which consists of Trustees who are neither
"interested persons" of the Trust, as defined in Section 2(a)(19) of
the 1940 Act, nor parties to the action, suit or proceeding, or

(B) an independent legal counsel in a written opinion.

(f) The indemnification provided by this Section shall not be deemed
exclusive of any other rights to which a person may be entitled under any
by-law, agreement, vote of Shareholders or disinterested Trustees or
otherwise, both as to action in his official capacity and as to action in
another capacity while holding the office, and shall continue as to a person
who has ceased to be a Trustee, officer, employee, or agent and inure to the
benefit of the heirs, executors and administrators of such person; provided
that no

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person may satisfy any right of indemnity or reimbursement granted herein or
to which he may be otherwise entitled except out of the property of the
Trust, and no Shareholder shall be personally liable with respect to any
claim for indemnity or reimbursement or otherwise.

(g) The Trust may purchase and maintain insurance on behalf of any person
who is or was a Trustee, officer, employee, or agent of the Trust, against
any liability asserted against him and incurred by him in any such capacity,
or arising out of his status as such. However, in no event will the Trust
purchase insurance to indemnify any officer or Trustee against liability for
any act for which the Trust itself is not permitted to indemnify him.

(h) Nothing contained in this Section shall be construed to protect any
Trustee or officer of the Trust against any liability to the Trust or to its
security holders to which he would otherwise be subject by reason of willful
misfeasance, bad faith, gross negligence or reckless disregard of the duties
involved in the conduct of his office.

ARTICLE V
COMMITTEES

SECTION 5.1. Executive and Other Committees. The Trustees, by resolution
adopted by a majority of the Trustees, may designate an Executive Committee
and/or committees, each committee to consist of two (2) or more of the
Trustees of the Trust and may delegate to such committees, in the intervals
between meetings of the Trustees, any or all of the powers of the Trustees in
the management of the business and affairs of the Trust. In the absence of
any member of any such committee, the members thereof present at any meeting,
whether or not they constitute a quorum, may appoint a Trustee to act in
place of such absent member. Each such committee shall keep a record of its
proceedings.

The Executive Committee and any other committee shall fix its own rules or
procedure, but the presence of at least fifty percent (50%) of the members of
the whole committee shall in each case be necessary to constitute a quorum of
the committee and the affirmative vote of the majority of the members of the
committee present at the meeting shall be necessary to take action.

All actions of the Executive Committee shall be reported to the Trustees
at the meeting thereof next succeeding to the taking of such action.

SECTION 5.2. Advisory Committee. The Trustees may appoint an advisory
committee which shall be composed of persons who do not serve the Trust in
any other capacity and which shall have advisory functions with respect to
the investments of the Trust but which shall have no power to determine that
any security or other investment shall be purchased, sold or otherwise
disposed of by the Trust. The number of persons constituting any such
advisory committee shall be determined from time to time by the Trustees. The
members of any such advisory committee may receive compensation for their
services and may be allowed such fees and expenses for the attendance at
meetings as the Trustees may from time to time determine to be appropriate.

SECTION 5.3. Committee Action Without Meeting. The provisions of these
By-Laws covering notices and meetings to the contrary notwithstanding, and
except as required by law, any action required or permitted to be taken at
any meeting of any Committee of the Trustees appointed pursuant to Section
5.1 of these By-Laws may be taken without a meeting if a consent in writing
setting forth the action shall be signed by all members of the Committee
entitled to vote upon the action and such written consent is filed with the
records of the proceedings of the Committee.

ARTICLE VI
OFFICERS

SECTION 6.1. Executive Officers. The executive officers of the Trust shall
be a Chairman, a President, one or more Vice Presidents, a Secretary and a
Treasurer. The Chairman shall be selected from among the Trustees but none of
the other executive officers need be a Trustee. Two or more offices, except
those of President and any Vice President, may be held by the same person,
but no officer shall execute,

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acknowledge or verify any instrument in more than one capacity. The executive
officers of the Trust shall be elected annually by the Trustees and each
executive officer so elected shall hold office until his or her successor is
elected and has qualified.

SECTION 6.2. Other Officers and Agents. The Trustees may also elect one or
more Assistant Vice Presidents, Assistant Secretaries and Assistant
Treasurers and may elect, or may delegate to the Chairman the power to
appoint, such other officers and agents as the Trustees shall at any time or
from time to time deem advisable.

SECTION 6.3. Term and Removal and Vacancies. Each officer of the Trust
shall hold office until his or her successor is elected and has qualified.
Any officer or agent of the Trust may be removed by the Trustees whenever, in
their judgment, the best interests of the Trust will be served thereby, but
such removal shall be without prejudice to the contractual rights, if any, of
the person so removed.

SECTION 6.4. Compensation of Officers. The compensation of officers and
agents of the Trust shall be fixed by the Trustees, or by the Chairman to the
extent provided by the Trustees with respect to officers appointed by the
Chairman.

SECTION 6.5. Powers and Duties. All officers and agents of the Trust, as
between themselves and the Trust, shall have such authority and perform such
duties in the management of the Trust as may be provided in or pursuant to
these By-Laws or, to the extent not so provided, as may be prescribed by the
Trustees; provided that no rights of any third party shall be affected or
impaired by any such By-Law or resolution of the Trustees unless such third
party has knowledge thereof.

SECTION 6.6. The Chairman. The Chairman shall be the chief executive
officer of the Trust, shall preside at all meetings of the Shareholders and
of the Trustees, shall have general and active management of the business of
the Trust, shall see that all orders and resolutions of the Trustees are
carried into effect and, in connection therewith, shall be authorized to
delegate to the President or to one or more Vice Presidents such of his or
her powers and duties at such times and in such manner as he or she may deem
advisable, shall be a signatory on all Annual and Semi-Annual Reports as may
be sent to Shareholders, and shall perform such other duties as the Trustees
may from time to time prescribe.

SECTION 6.7. The President. The President shall perform such duties as the
Trustees and the Chairman may from time to time prescribe and shall, in the
absence or disability of the Chairman, exercise the powers and perform the
duties of the Chairman. The President shall be authorized to delegate to one
or more Vice Presidents such of his or her powers and duties at such times
and in such manner as he or she may deem advisable.

SECTION 6.8. The Vice Presidents. The Vice Presidents shall be of such
number and shall have such titles as may be determined from time to time by
the Trustees. The Vice President, or, if there shall be more than one, the
Vice Presidents in such order as may be determined from time to time by the
Trustees or the Chairman, shall, in the absence or disability of the
President, exercise the powers and perform the duties of the President, and
shall perform such other duties as the Trustees or the Chairman may from time
to time prescribe.

SECTION 6.9. The Assistant Vice Presidents. The Assistant Vice President,
or, if there shall be more than one, the Assistant Vice Presidents in such
order as may be determined from time to time by the Trustees or the Chairman,
shall perform such duties and have such powers as may be assigned them from
time to time by the Trustees or the Chairman.

SECTION 6.10. The Secretary. The Secretary shall attend all meetings of
the Trustees and all meetings of the Shareholders and record all the
proceedings of the meetings of the Shareholders and of the Trustees in a book
to be kept for that purpose, and shall perform like duties for the standing
committees when required. He or she shall give, or cause to be given, notice
of all meetings of the Shareholders and special meetings of the Trustees, and
shall perform such other duties and have such powers as the Trustees or the
Chairman may from time to time prescribe. He or she shall keep in safe
custody the seal of the Trust and affix or cause the same to be affixed to
any instrument requiring it, and, when so affixed, it shall be attested by
his or her signature or by the signature of an Assistant Secretary.

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SECTION 6.11. The Assistant Secretaries. The Assistant Secretary, or, if
there shall be more than one, the Assistant Secretaries in such order as may
be determined from time to time by the Trustees or the Chairman, shall, in
the absence or disability of the Secretary, perform the duties and exercise
the powers of the Secretary and shall perform such duties and have such other
powers as the Trustees or the Chairman may from time to time prescribe.

SECTION 6.12. The Treasurer. The Treasurer shall be the chief financial
officer of the Trust. He or she shall keep or cause to be kept full and
accurate accounts of receipts and disbursements in books belonging to the
Trust, and he or she shall render to the Trustees and the Chairman, whenever
any of them require it, an account of his or her transactions as Treasurer
and of the financial condition of the Trust, and he or she shall perform such
other duties as the Trustees or the Chairman may from time to time prescribe.

SECTION 6.13. The Assistant Treasurers. The Assistant Treasurer, or, if
there shall be more than one, the Assistant Treasurers in such order as may
be determined from time to time by the Trustees or the Chairman, shall, in
the absence or disability of the Treasurer, perform the duties and exercise
the powers of the Treasurer and shall perform such other duties and have such
other powers as the Trustees or the Chairman may from time to time prescribe.

SECTION 6.14. Delegation of Duties. Whenever an officer is absent or
disabled, or whenever for any reason the Trustees may deem it desirable, the
Trustees may delegate the powers and duties of an officer or officers to any
other officer or officers or to any Trustee or Trustees.

ARTICLE VII
DIVIDENDS AND DISTRIBUTIONS

Subject to any applicable provisions of law and the Declaration, dividends
and distributions upon the Shares may be declared at such intervals as the
Trustees may determine, in cash, in securities or other property, or in
Shares, from any sources permitted by law, all as the Trustees shall from
time to time determine.

Inasmuch as the computation of net income and net profits from the sales
of securities or other properties for federal income tax purposes may vary
from the computation thereof on the records of the Trust, the Trustees shall
have power, in their discretion, to distribute as income dividends and as
capital gain distributions, respectively, amounts sufficient to enable the
Trust to avoid or reduce liability for federal income taxes.

ARTICLE VIII
CERTIFICATES OF SHARES

SECTION 8.1. Certificates of Shares. Certificates for Shares of each
series or class of Shares shall be in such form and of such design as the
Trustees shall approve, subject to the right of the Trustees to change such
form and design at any time or from time to time, and shall be entered in the
records of the Trust as they are issued. Each such certificate shall bear a
distinguishing number; shall exhibit the holder's name and certify the number
of full Shares owned by such holder; shall be signed by or in the name of the
Trust by the Chairman, the President, or a Vice President, and countersigned
by the Secretary or an Assistant Secretary or the Treasurer and an Assistant
Treasurer of the Trust; shall be sealed with the seal; and shall contain such
recitals as may be required by law. Where any certificate is signed by a
Transfer Agent or by a Registrar, the signature of such officers and the seal
may be facsimile, printed or engraved. The Trust may, at its option,
determine not to issue a certificate or certificates to evidence Shares owned
of record by any Shareholder.

In case any officer or officers who shall have signed, or whose facsimile
signature or signatures shall appear on, any such certificate or certificates
shall cease to be such officer or officers of the Trust, whether because of
death, resignation or otherwise, before such certificate or certificates
shall have been delivered by the Trust, such certificate or certificates
shall, nevertheless, be adopted by the Trust and be issued and

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delivered as though the person or persons who signed such certificate or
certificates or whose facsimile signature or signatures shall appear therein
had not ceased to be such officer or officers of the Trust.

No certificate shall be issued for any share until such share is fully
paid.

SECTION 8.2. Lost, Stolen, Destroyed and Mutilated Certificates. The
Trustees may direct a new certificate or certificates to be issued in place
of any certificate or certificates theretofore issued by the Trust alleged to
have been lost, stolen or destroyed, upon satisfactory proof of such loss,
theft, or destruction; and the Trustees may, in their discretion, require the
owner of the lost, stolen or destroyed certificate, or his legal
representative, to give to the Trust and to such Registrar, Transfer Agent
and/or Transfer Clerk as may be authorized or required to countersign such
new certificate or certificates, a bond in such sum and of such type as they
may direct, and with such surety or sureties, as they may direct, as
indemnity against any claim that may be against them or any of them on
account of or in connection with the alleged loss, theft or destruction of
any such certificate.

ARTICLE IX
CUSTODIAN

SECTION 9.1. Appointment and Duties. The Trust shall at times employ a
bank or trust company having capital, surplus and undivided profits of at
least five million dollars ($5,000,000) as custodian with authority as its
agent, but subject to such restrictions, limitations and other requirements,
if any, as may be contained in these By-Laws and the 1940 Act:

(1) to receive and hold the securities owned by the Trust and deliver the
same upon written or electronically transmitted order;

(2) to receive and receipt for any moneys due to the Trust and deposit
the same in its own banking department or elsewhere as the Trustees may
direct;

(3) to disburse such funds upon orders or vouchers;

all upon such basis of compensation as may be agreed upon between the
Trustees and the custodian. If so directed by a Majority Shareholder Vote,
the custodian shall deliver and pay over all property of the Trust held by it
as specified in such vote.

The Trustees may also authorize the custodian to employ one or more
sub-custodians from time to time to perform such of the acts and services of
the custodian and upon such terms and conditions as may be agreed upon
between the custodian and such sub-custodian and approved by the Trustees.

SECTION 9.2. Central Certificate System. Subject to such rules,
regulations and orders as the Commission may adopt, the Trustees may direct
the custodian to deposit all or any part of the securities owned by the Trust
in a system for the central handling of securities established by a national
securities exchange or a national securities association registered with the
Commission under the Securities Exchange Act of 1934, or such other person as
may be permitted by the Commission, or otherwise in accordance with the 1940
Act, pursuant to which system all securities of any particular class or
series of any issuer deposited within the system are treated as fungible and
may be transferred or pledged by bookkeeping entry without physical delivery
of such securities, provided that all such deposits shall be subject to
withdrawal only upon the order of the Trust.

ARTICLE X
WAIVER OF NOTICE

Whenever any notice of the time, place or purpose of any meeting of
Shareholders, Trustees, or of any committee is required to be given in
accordance with law or under the provisions of the Declaration or these
By-Laws, a waiver thereof in writing, signed by the person or persons
entitled to such notice and filed with the records of the meeting, whether
before or after the holding thereof, or actual attendance at the meeting of
shareholders, Trustees or committee, as the case may be, in person, shall be
deemed equivalent to the giving of such notice to such person.

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ARTICLE XI
MISCELLANEOUS

SECTION 11.1. Location of Books and Records. The books and records of the
Trust may be kept outside the Commonwealth of Massachusetts at such place or
places as the Trustees may from time to time determine, except as otherwise
required by law.

SECTION 11.2. Record Date. The Trustees may fix in advance a date as the
record date for the purpose of determining the Shareholders entitled to (i)
receive notice of, or to vote at, any meeting of Shareholders, or (ii)
receive payment of any dividend or the allotment of any rights, or in order
to make a determination of Shareholders for any other proper purpose. The
record date, in any case, shall not be more than one hundred eighty (180)
days, and in the case of a meeting of Shareholders not less than ten (10)
days, prior to the date on which such meeting is to be held or the date on
which such other particular action requiring determination of Shareholders is
to be taken, as the case may be. In the case of a meeting of Shareholders,
the meeting date set forth in the notice to Shareholders accompanying the
proxy statement shall be the date used for purposes of calculating the 180
day or 10 day period, and any adjourned meeting may be reconvened without a
change in record date. In lieu of fixing a record date, the Trustees may
provide that the transfer books shall be closed for a stated period but not
to exceed, in any case, twenty (20) days. If the transfer books are closed
for the purpose of determining Shareholders entitled to notice of a vote at a
meeting of Shareholders, such books shall be closed for at least ten (10)
days immediately preceding the meeting.

SECTION 11.3. Seal. The Trustees shall adopt a seal, which shall be in
such form and shall have such inscription thereon as the Trustees may from
time to time provide. The seal of the Trust may be affixed to any document,
and the seal and its attestation may be lithographed, engraved or otherwise
printed on any document with the same force and effect as if it had been
imprinted and attested manually in the same manner and with the same effect
as if done by a Massachusetts business corporation under Massachusetts law.

SECTION 11.4. Fiscal Year. The fiscal year of the Trust shall end on such
date as the Trustees may by resolution specify, and the Trustees may by
resolution change such date for future fiscal years at any time and from time
to time.

SECTION 11.5. Orders for Payment of Money. All orders or instructions for
the payment of money of the Trust, and all notes or other evidences of
indebtedness issued in the name of the Trust, shall be signed by such officer
or officers or such other person or persons as the Trustees may from time to
time designate, or as may be specified in or pursuant to the agreement
between the Trust and the bank or trust company appointed as Custodian of the
securities and funds of the Trust.

ARTICLE XII
COMPLIANCE WITH FEDERAL REGULATIONS

The Trustees are hereby empowered to take such action as they may deem to
be necessary, desirable or appropriate so that the Trust is or shall be in
compliance with any federal or state statute, rule or regulation with which
compliance by the Trust is required.

ARTICLE XIII
AMENDMENTS

These By-Laws may be amended, altered, or repealed, or new By-Laws may be
adopted, (a) by a Majority Shareholder Vote, or (b) by the Trustees;
provided, however, that no By-Law may be amended, adopted or repealed by the
Trustees if such amendment, adoption or repeal requires, pursuant to law, the
Declaration, or these By-Laws, a vote of the Shareholders. The Trustees shall
in no event adopt By-Laws which are in conflict with the Declaration, and any
apparent inconsistency shall be construed in favor of the related provisions
in the Declaration.

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ARTICLE XIV
DECLARATION OF TRUST

The Declaration of Trust establishing TCW/DW North American Government
Income Trust, dated February 19, 1992, a copy of which, together with all
amendments thereto, is on file in the office of the Secretary of the
Commonwealth of Massachusetts, provides that the name TCW/DW North American
Government Income Trust refers to the Trustees under the Declaration
collectively as Trustees, but not as individuals or personally; and no
Trustee, Shareholder, officer, employee or agent of TCW/DW North American
Government Income Trust shall be held to any personal liability, nor shall
resort be had to their private property for the satisfaction of any
obligation or claim or otherwise, in connection with the affairs of said
TCW/DW North American Government Income Trust, but the Trust Estate only
shall be liable.