INSURED TAXABLE FUND DEFINED ASSET FUNDS
497, 2000-04-03
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                           DEFINED ASSET FUNDS--REGISTERED TRADEMARK--
                           ----------------------------------------------------

                           INSURED TAXABLE FUND
                           (A UNIT INVESTMENT TRUST)
                           -  PORTFOLIO OF INSURED LONG TERM BONDS
                           -  TAXABLE TO U.S. INVESTORS
                           -  U.S. TAX EXEMPT FOR MANY FOREIGN INVESTORS
                           -  INCOME DISTRIBUTIONS TWICE A YEAR

SPONSORS:
MERRILL LYNCH,             -----------------------------------------------------
PIERCE, FENNER & SMITH     The Securities and Exchange Commission has not
INCORPORATED               approved or disapproved these Securities or passed
SALOMON SMITH BARNEY INC.  upon the adequacy of this prospectus. Any
PAINEWEBBER INCORPORATED   representation to the contrary is a criminal offense.
DEAN WITTER REYNOLDS INC.  Prospectus dated March 31, 2000.

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

Defined Asset Funds--Registered Trademark--
Defined Asset Funds-Registered Trademark- is America's oldest and largest family
of unit investment trusts, with over $160 billion sponsored over the last 28
years. Defined Asset Funds has been a leader in unit investment trust research
and product innovation. Our family of Funds helps investors work toward their
financial goals with a full range of quality investments, including municipal,
corporate and government bond portfolios, as well as domestic and international
equity portfolios.

Defined Asset Funds offer a number of advantages:
  - A disciplined strategy of buying and holding with a long-term view is the
    cornerstone of Defined Asset Funds.
  - Fixed portfolio: Defined Funds follow a buy and hold investment strategy;
    funds are not managed and portfolio changes are limited.
  - Defined Portfolios: We choose the stocks and bonds in advance, so you know
    what you're investing in.
  - Professional research: Our dedicated research team seeks out stocks or bonds
    appropriate for a particular fund's objectives.
  - Ongoing supervision: We monitor each portfolio on an ongoing basis.
No matter what your investment goals, tolerance for risk or time horizon,
there's probably a Defined Asset Fund that suits your investment style. Your
financial professional can help you select a Defined Asset Fund that works best
for your investment portfolio.

THE FINANCIAL INFORMATION IN THIS PROSPECTUS IS AS OF THE EVALUATION DATE,
DECEMBER 31, 1999.

<TABLE>
<S>                                    <C>
CONTENTS
                                       PAGE
                                       ----
Risk/Return Summary..................     3
What You Can Expect From Your
  Investment.........................     6
  Income Twice a Year................     6
  Return Figures.....................     6
  Records and Reports................     6
The Risks You Face...................     7
  Interest Rate Risk.................     7
  Call Risk..........................     7
  Reduced Diversification Risk.......     7
  Liquidity Risk.....................     7
  Concentration Risk.................     7
  Bond Quality Risk..................     8
  Insurance Related Risk.............     8
  Litigation and Legislation Risks...     8
Selling or Exchanging Units..........     8
  Sponsors' Secondary Market.........     8
  Selling Units to the Trustee.......     8
  Exchange Option....................     9
How The Fund Works...................    10
  Pricing............................    10
  Evaluations........................    10
  Income.............................    10
  Expenses...........................    10
  Portfolio Changes..................    11
  Fund Termination...................    11
  Certificates.......................    12
  Trust Indenture....................    12
  Legal Opinion......................    12
  Auditors...........................    13
  Sponsors...........................    13
  Trustee............................    13
  Underwriters' and Sponsors'
    Profits..........................    13
  Public Distribution................    13
  Code of Ethics.....................    13
  Year 2000 Issues...................    14
Taxes................................    14
Supplemental Information.............    15
Financial Statements.................   D-1
</TABLE>

                                       2
<PAGE>
- --------------------------------------------------------------------------------

RISK/RETURN SUMMARY

<TABLE>
<C>  <S>
 1.  WHAT IS THE FUND'S OBJECTIVE?
     To provide a high level of current
     taxable income by investing in a fixed
     portfolio consisting primarily of
     insured long-term taxable municipal
     bonds with a duration of 15 to 30 years.

 2.  WHAT ARE TAXABLE MUNICIPAL BONDS?

  -  Taxable municipal bonds are typically
     issued by municipalities or their
     agencies for purposes which do not
     qualify for federal tax exemption, but
     do qualify for state and local tax
     exemption. These bonds are issued to
     finance the cost of buying, building or
     improving various projects, such as
     sporting facilities, health care
     facilities, housing projects, electric,
     water and sewer utilities, and colleges
     or universities.

  -  Generally, payments on these bonds
     depend on the revenues generated by the
     projects, excise taxes or state
     appropriations, or the bonds can be
     backed by the government's taxing power.

  -  Due to federal taxation, taxable
     municipal bonds offer yields more
     comparable to other taxable sectors such
     as corporate bonds or agency bonds than
     to other municipal bonds. These bonds
     are federally taxable to individuals but
     may be exempt from state and local
     taxes, depending on where you live.

 3.  WHAT IS THE FUND'S INVESTMENT STRATEGY?

  -  The Fund plans to hold to maturity 10
     insured long-term taxable municipal
     bonds, and some short-term bonds
     reserved to pay the deferred sales
     charge, with an aggregate face amount of
     $10,190,000.

  -  The Fund is a unit investment trust
     which means that, unlike a mutual fund,
     the Fund's portfolio is not managed.
  -  The bonds are rated AAA or Aaa by
     Standard & Poor's, Moody's or Fitch.
  -  Most of the bonds cannot be called for
     several years, and after that they can
     be called at a premium declining over
     time to par value. Some bonds may be
     called earlier at par for extraordinary
     reasons.
  -  100% of the bonds are insured by AAA-
     rated insurance companies that guarantee
     timely payments of principal and
     interest on the bonds (but not Fund
     units or the market value of the bonds
     before they mature).

     The Portfolio consists of taxable
     municipal bonds of the following types:
</TABLE>

<TABLE>
  -  General Obligation                       29%
<C>  <S>
  -  Lease Rental                             10%
  -  Special Tax                              29%
  -  Transit Authorities                      10%
  -  State/Local Government Supported        12%
  -  Industrial Development Revenue          10%

 4.  WHAT ARE THE SIGNIFICANT RISKS?

     YOU CAN LOSE MONEY BY INVESTING IN THE FUND.
     THIS CAN HAPPEN FOR VARIOUS REASONS,
     INCLUDING:
  -  Rising interest rates, an issuer's worsening
     financial condition or a drop in bond
     ratings can reduce the price of your units.
  -  The Fund is concentrated in general
     obligation and special tax bonds.

     Here are some things you should know about
     the Fund's concentration in general
     obligation bonds:

     -- because these bonds are backed by the
       issuer's full faith and credit and taxing
       power, any limitation on a government
       issuer's taxing power may affect repayment
       of the bonds.

     -- an issuer's credit can be adversely
       affected by, among other things, natural
       disasters, a decline in industry and
       limited access to capital markets.

     Payment on special tax bonds may be
     adversely affected by:

     -- reduction in revenues resulting from a
       decline in local economy or population; or

     -- a decline in consumption, cost or use of
       goods and services subject to taxation.
  -  Assuming no changes in interest rates, when
     you sell your units, they will generally be
     worth less than your cost because your cost
     included a sales fee.
  -  The Fund will receive early returns of
     principal if bonds are called or sold before
     they mature. If this happens your income
     will decline and you may not be able to
     reinvest the money you receive at as high a
     yield or as long a maturity.
</TABLE>

                                       3
<PAGE>

<TABLE>
<C>  <S>
 5.  IS THIS FUND APPROPRIATE FOR YOU?

     Yes, if you want taxable semiannual
     income. You will benefit from a
     professionally selected and supervised
     portfolio whose risk is reduced by
     investing in bonds of several different
     issuers.
     The Fund is NOT appropriate for you if
     you want a speculative investment that
     changes to take advantage of market
     movements, if you want a tax-advantaged
     investment or if you cannot tolerate any
     risk.
</TABLE>

                   DEFINING YOUR INCOME AND ESTIMATING RETURN

<TABLE>
<C>  <S>                                           <C>
     WHAT YOU MAY EXPECT (RECORD DAY: 10th day of
     each February and August)
     Regular Semi-Annual Income per 1,000 units
     on the 25th day of each February and August:   $31.93
     Annual Income per 1,000 units.                 $63.86

     THESE FIGURES ARE ESTIMATES ON THE EVALUATION DATE;
     ACTUAL PAYMENTS MAY VARY.
</TABLE>

<TABLE>
<C>  <S>
 6.  WHAT ARE THE FUND'S FEES AND EXPENSES?

     This table shows the costs and expenses you may pay,
     directly or indirectly, when you invest in the Fund.

     INVESTOR FEES

     Maximum Sales Fee (Load) on new
     purchases (as a percentage of
     $1,000 invested)                            2.90%

     You will pay an up-front sales fee of 1.714%, as well
     as a total deferred sales fee of $11.86 per 1,000
     units (paid in quarterly installments November,
     February, May and August, through February, 2001).

     Employees of some of the Sponsors and their affiliates
     may be charged a reduced sales fee of no less than
     $5.00 per 1,000 units.

     The maximum sales fee is reduced if you invest at
     least $100,000, as follows:
</TABLE>

<TABLE>
<CAPTION>
                               YOUR MAXIMUM
                                SALES FEE
          IF YOU INVEST:         WILL BE:
          --------------       ------------
<C>  <S>                       <C>
     Less than $100,000            2.90%
     $100,000 to $249,999          2.65%
     $250,000 to $499,999          2.40%
     $500,000 to $999,999          2.15%
     $1,000,000 and over           1.90%

     Maximum Exchange Fee          1.90%
</TABLE>

<TABLE>
<C>  <S>
     ESTIMATED ANNUAL FUND OPERATING EXPENSES
</TABLE>

<TABLE>
<CAPTION>
                                                    AMOUNT
                                                  PER 1,000
                                                    UNITS
                                                  ---------
<C>  <S>                                          <C>
                                                    $ 0.63
     Trustee's Fee
                                                    $ 0.46
     Portfolio Supervision,
     Bookkeeping and
     Administrative Fees
     (including updating
     expenses)
                                                    $ 0.13
     Evaluator's Fee
                                                    $ 0.21
     Other Operating Expenses
                                                    ------
                                                    $ 1.43
     TOTAL
</TABLE>

<TABLE>
<C>  <S>
     The Sponsors historically paid updating
     expenses.
</TABLE>

<TABLE>
<C>  <S>
 7.  IS THE FUND MANAGED?

     Unlike a mutual fund, the Fund is not
     managed and bonds are not sold because
     of market changes. Rather, experienced
     Defined Asset Funds financial analysts
     regularly review the bonds in the Fund.
     The Fund may sell a bond if certain
     adverse credit or other conditions
     exist.
 8.  HOW DO I BUY UNITS?

     You can buy units from any of the
     Sponsors and other broker-dealers. The
     Sponsors are listed later in this
     prospectus. Some banks may offer units
     for sale through special arrangements
     with the Sponsors, although certain
     legal restrictions may apply.

     The minimum investment is $250.
</TABLE>

<TABLE>
<C>  <S>
     UNIT PRICE PER 1,000 UNITS       $889.64
     (as of December 31, 1999)

     Unit price is based on the net asset
     value of the Fund plus the sales fee. An
     amount equal to any principal cash, as
     well as net accrued but undistributed
     interest on the unit, is added to the
     unit price. Unit price also includes the
     estimated organization costs shown on
     the previous page. An independent
     evaluator prices the bonds at 3:30 p.m.
     Eastern time every business day. Unit
     price changes every day with changes in
     the prices of the bonds in the Fund.
</TABLE>

                                       4
<PAGE>
<TABLE>
<C>  <S>
 9.  HOW DO I SELL UNITS?

     You may sell your units at any time to
     any Sponsor or the Trustee for the net
     asset value determined at the close of
     business on the date of sale, less any
     remaining deferred sales fee. You will
     not pay any other fee when you sell your
     units.

10.  HOW ARE DISTRIBUTIONS MADE AND TAXED?

     The Fund pays income twice a year.
     Interest on the bonds in this fund is
     subject to federal income taxes for U.S.
     investors, but if you are a non-U.S.
     investor, your interest may be exempt
     from U.S. federal income taxes,
     including withholding taxes. A portion
     of the income may be exempt from some
     state and local taxes, depending on
     where you live.

     You will also receive principal payments
     if bonds are sold or called or mature,
     when the cash available is more than
     $10.00 per 1,000 units. You will be
     subject to tax on any gain realized by
     the Fund on the disposition of bonds.

11.  WHAT OTHER SERVICES ARE AVAILABLE?

     REINVESTMENT
     You will receive your semiannual income
     in cash unless you choose to compound
     your income by reinvesting at no sales
     fee in the Corporate Fund Investment
     Accumulation Program, Inc. This program
     is an open-end mutual fund with a
     comparable investment objective, will
     generally not be insured.

     Income from this program will be subject
     to U.S. federal income taxes for BOTH
     U.S. and foreign investors. FOR MORE
     COMPLETE INFORMATION ABOUT THE PROGRAM,
     INCLUDING CHARGES AND FEES, ASK THE
     TRUSTEE FOR THE PROGRAM'S PROSPECTUS.
     READ IT CAREFULLY BEFORE YOU INVEST. THE
     TRUSTEE MUST RECEIVE YOUR WRITTEN
     ELECTION TO REINVEST AT LEAST 10 DAYS
     BEFORE THE RECORD DAY OF AN INCOME
     PAYMENT.

     EXCHANGE PRIVILEGES
     You may exchange units of this Fund for
     units of certain other Defined Asset
     Funds. You may also exchange into this
     Fund from certain other funds. We charge
     a reduced sales fee on exchanges.
</TABLE>

                                       5
<PAGE>
WHAT YOU CAN EXPECT FROM YOUR INVESTMENT

INCOME TWICE A YEAR

The Fund will pay you regular taxable income twice a year. Your income may vary
because of:
  - elimination of one or more bonds from the Fund's portfolio because of calls,
    redemptions or sales;
  - a change in the Fund's expenses; or
  - the failure by a bond's issuer to pay interest.

Changes in interest rates generally will not affect your income because the
portfolio is fixed.

Along with your income, you will receive your share of any available bond
principal.

RETURN FIGURES

We cannot predict your actual return, which will vary with unit price, how long
you hold your investment and changes in the portfolio, interest income and
expenses.

ESTIMATED CURRENT RETURN equals the estimated annual cash to be received from
the bonds in the Fund less estimated annual Fund expenses, divided by the Unit
Price (including the maximum sales fee):

<TABLE>
<S>              <C>  <C>
Estimated Annual         Estimated
Interest Income   -   Annual Expenses
- -------------------------------------
             Unit Price
</TABLE>

ESTIMATED LONG TERM RETURN is a measure of the estimated return over the
estimated life of the Fund. Unlike Estimated Current Return, Estimated Long Term
Return reflects maturities, discounts and premiums of the bonds in the Fund. It
is an average of the yields to maturity (or in certain cases, to an earlier call
date) of the individual bonds in the portfolio, adjusted to reflect the Fund's
maximum sales fee and estimated expenses. We calculate the average yield for the
portfolio by weighting each bond's yield by its market value and the time
remaining to the call or maturity date.

Yields on individual bonds depend on many factors including general conditions
of the bond markets, the size of a particular offering and the maturity and
quality rating of the particular issues. Yields can vary among bonds with
similar maturities, coupons and ratings.

These return quotations are designed to be comparative rather than predictive.

RECORDS AND REPORTS

You will receive:
- - a statement of income payments and any principal payments;
- - a notice from the Trustee when new bonds are deposited in exchange or
  substitution for bonds originally deposited;
- - an annual report on Fund activity; and
- - annual tax information. THIS WILL ALSO BE SENT TO THE IRS. YOU MUST REPORT THE
  AMOUNT OF INCOME RECEIVED DURING THE YEAR.

You may request:
- - copies of bond evaluations to enable you to comply with federal and state tax
  reporting requirements; and
- - audited financial statements of the Fund.

You may inspect records of Fund transactions at the Trustee's office during
regular business hours.

                                       6
<PAGE>
THE RISKS YOU FACE

INTEREST RATE RISK

Investing involves risks, including the risk that your investment will decline
in value if interest rates rise. Generally, bonds with longer maturities will
change in value more than bonds with shorter maturities. Bonds in the Fund are
more likely to be called when interest rates decline. This would result in early
returns of principal to you and may result in early termination of the Fund. Of
course, we cannot predict how interest rates may change.

CALL RISK

Many bonds can be prepaid or "called" by the issuer before their stated
maturity.

For example, an issuer might call its bonds if it no longer needs the money for
the original purpose or, during periods of falling interest rates, if the
issuer's bonds have a coupon higher than current market rates. If the bonds are
called, your income will decline and you may not be able to reinvest the money
you receive at as high a yield or as long a maturity. An early call at par of a
premium bond will reduce your return.

REDUCED DIVERSIFICATION RISK

If many investors sell their units, the Fund will have to sell bonds. This could
reduce the diversification of your investment and increase your share of Fund
expenses.

LIQUIDITY RISK

The bonds will generally trade in the over-the-counter market. We cannot assure
you that a liquid trading market will exist, especially since current law may
restrict the Fund from selling bonds to any Sponsor. The value of the bonds, and
of your investment, may be reduced if trading in bonds is limited or absent.

CONCENTRATION RISK

When a certain type of bond makes up 25% or more of the portfolio, the Fund is
said to be "concentrated" in that bond type, which makes the Fund less
diversified.

Here is what you should know about the Fund's concentration in general
obligation bonds:
  - general obligation bonds are backed by the issuer's pledge of its full
    faith, credit and taxing power;
  - but the taxing power of any government issuer may be limited by provisions
    of the state constitution or laws as well as political and economic
    considerations; and
  - an issuer's credit can be negatively affected by various factors, including
    population decline that erodes the tax base, natural disasters, decline in
    industry, limited access to capital markets or heavy reliance on state or
    federal aid.

Here is what you should know about the Fund's concentration in special tax
bonds. Special tax bonds are payable from and secured by the revenues a
municipality derives from a particular tax; for example, a tax on hotel rentals,
on the purchase of food and beverages, car rentals, or liquor consumption. These
bonds are not secured by general tax revenues. Payment on these bonds may be
adversely affected by:
  - a reduction in revenues resulting from a decline in the local economy or
    population; or
  - a decline in the consumption, use or cost of the goods and services that are
    subject to taxation.

                                       7
<PAGE>
Changes to the portfolio from bond redemptions, maturities and sales may affect
the Fund's concentration over time.

BOND QUALITY RISK

A reduction in a bond's rating may decrease its value and, indirectly, the value
of your investment in the Fund.

INSURANCE RELATED RISK

The bonds are backed by insurance companies (as shown under Defined Portfolio).
Insurance policies generally make payments only according to a bond's original
payment schedule and do not make early payments when a bond defaults. Although
the federal government does not regulate the insurance business, various state
laws and federal initiatives and tax law changes could significantly affect the
insurance business. The claims-paying ability of the insurance companies is
generally rated A or better by Standard & Poor's or another nationally
recognized rating organization. The insurance company ratings are subject to
change at any time at the discretion of the rating agencies.

LITIGATION AND LEGISLATION RISKS

We do not know of any pending litigation that might have a material adverse
effect upon the Fund.

Future tax legislation could affect the value of the portfolio by:
  - limiting real property taxes,
  - reducing tax rates,
  - imposing a flat or other form of tax, or
  - exempting investment income from tax.

SELLING OR EXCHANGING UNITS

You can sell your units at any time for a price based on net asset value. Your
net asset value is calculated each business day by:
  - ADDING the value of the bonds, net accrued interest, cash and any other Fund
    assets;
  - SUBTRACTING accrued but unpaid Fund expenses, unreimbursed Trustee advances,
    cash held to buy back units or for distribution to investors and any other
    Fund liabilities; and
  - DIVIDING the result by the number of outstanding units.

Your net asset value when you sell may be more or less than your cost because of
sales fees, market movements and changes in the portfolio.

If you sell your units before the final deferred sales fee installment, the
amount of any remaining installments will be deducted from your proceeds.

SPONSORS' SECONDARY MARKET

While we are not obligated to do so, we will buy back units at net asset value
without any other fee or charge other than any remaining deferred sales fee. We
may resell the units to other buyers or to the Trustee. You should consult your
financial professional for current market prices to determine if other broker-
dealers or banks are offering higher prices.

We have maintained a secondary market continuously for over 28 years, but we
could discontinue it without prior notice for any business reason.

SELLING UNITS TO THE TRUSTEE

Regardless of whether we maintain a secondary market, you can sell your units to
the Trustee at any time by sending the Trustee a letter (with any outstanding
certificates if you hold unit certificates). You

                                       8
<PAGE>
must properly endorse your certificates (or execute a written transfer
instrument with signatures guaranteed by an eligible institution). Sometimes,
additional documents are needed such as a trust document, certificate of
corporate authority, certificate of death or appointment as executor,
administrator or guardian.

Within seven days after your request and the necessary documents are received,
the Trustee will mail a check to you. Contact the Trustee for additional
information.

As long as we are maintaining a secondary market, the Trustee will sell your
units to us at a price based on net asset value. If there is no secondary
market, the Trustee may sell your units in the over-the-counter market for a
higher price, but it is not obligated to do so. In that case, you will receive
the net proceeds of the sale.

If the Fund does not have cash available to pay you for units you are selling,
the agent for the Sponsors will select bonds to be sold. Bonds will be selected
based on market and credit factors. These sales could be made at times when the
bonds would not otherwise be sold and may result in your receiving less than the
unit par value and also reduce the size and diversity of the Fund.

If you acquire 25% or more of the outstanding units of the Fund and you sell
units with a value exceeding $250,000, the Trustee may choose to pay you "in
kind" by distributing bonds and cash with a total value equal to the price of
those units. The Trustee will try to distribute bonds in the portfolio pro rata,
but it reserves the right to distribute only one or a few bonds. The Trustee
will act as your agent in an in kind distribution and will either hold the bonds
for your account or sell them as you instruct. You must pay any transaction
costs as well as transfer and ongoing custodial fees on sales of bonds
distributed in kind.

There could be a delay in paying you for your units:
  - if the New York Stock Exchange is closed (other than customary weekend and
    holiday closings);
  - if the SEC determines that trading on the New York Stock Exchange is
    restricted or that an emergency exists making sale or evaluation of the
    bonds not reasonably practicable; and
  - for any other period permitted by SEC order.

EXCHANGE OPTION

You may exchange units of certain Defined Asset Funds for units of this Fund at
a maximum exchange fee of 1.90%. You may exchange units of this Fund for units
of certain other funds at a reduced sales fee if your investment goals change.
To exchange units, you should talk to your financial professional about what
funds are exchangeable, suitable and currently available.

Normally, an exchange is taxable and you must recognize any gain or loss on the
exchange. However, the IRS may try to disallow a loss if the portfolios of the
two funds are not materially different; you should consult your own tax adviser.

We may amend or terminate this exchange option at any time without notice.

                                       9
<PAGE>
HOW THE FUND WORKS

PRICING

The price of a unit includes interest accrued on the bonds, less expenses, from
the most recent Record Day up to, but not including, the settlement date, which
is usually three business days after the purchase date of the unit.
In addition, as with mutual funds, the Fund (and therefore the investors) pay
all or some of the costs of organizing the Fund including:
  - cost of initial preparation of legal documents;
  - federal and state registration fees;
  - initial fees and expenses of the Trustee;
  - initial audit; and
  - legal expenses and other out-of-pocket expenses.

These costs are amortized over the first five years of the Fund.

EVALUATIONS

An independent Evaluator values the bonds on each business day (excluding
Saturdays, Sundays and the following holidays as observed by the New York Stock
Exchange: New Year's Day, Presidents' Day, Martin Luther King, Jr. Day, Good
Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas).
Bond values are based on current bid or offer prices for the bonds or comparable
bonds. In the past, the difference between bid and offer prices of publicly
offered tax-exempt bonds has ranged from 0.5% of face amount on actively traded
issues to 3.5% on inactively traded issues; the difference has averaged between
1 and 2%.

INCOME

The Trustee credits interest to an Income Account and other receipts to a
Capital Account. The Trustee may establish a Reserve Account by withdrawing from
these accounts amounts it considers appropriate to pay any material liability.
These accounts do not bear interest.

EXPENSES

The Trustee is paid monthly. It also benefits when it holds cash for the Fund in
non-interest bearing accounts. The Trustee may also receive additional amounts:
  - to reimburse the Trustee for the Fund's operating expenses;
  - for extraordinary services and costs of indemnifying the Trustee and the
    Sponsors;
  - costs of actions taken to protect the Fund and other legal fees and
    expenses;
  - expenses for keeping the Fund's registration statement current; and
  - Fund termination expenses and any governmental charges.

The Sponsors are currently reimbursed up to 55 CENTS per $1,000 face amount
annually for providing portfolio supervisory, bookkeeping and administrative
services and for any other expenses properly chargeable to the Fund. Legal,
typesetting, electronic filing and regulatory filing fees and expenses
associated with updating the Portfolio's registration statement yearly are also
now chargeable to the Portfolio. While this fee may exceed the amount of these
costs and expenses attributable to this Fund, the total of these fees for all
Series of Defined Asset Funds will not exceed the aggregate amount attributable

                                       10
<PAGE>
to all of these Series for any calendar year. The Fund also pays the Evaluator's
fees.

The Trustee's, Sponsors' and Evaluator's fees may be adjusted for inflation
without investors' approval.

Any quarterly deferred sales charges you owe are paid with interest and
principal from certain bonds. If these amounts are not enough, the rest will be
paid out of distributions to you from the Fund's Capital and Income Accounts.

The Sponsors will pay advertising and selling expenses at no charge to the Fund.
If Fund expenses exceed initial estimates, the Fund will owe the excess. The
Trustee has a lien on Fund assets to secure reimbursement of Fund expenses and
may sell bonds if cash is not available.

PORTFOLIO CHANGES

The Sponsors and Trustee are not liable for any default or defect in a bond.

Unlike a mutual fund, the portfolio is designed to remain intact and we may keep
bonds in the portfolio even if their credit quality declines or other adverse
financial circumstances occur. However, we may sell a bond in certain cases if
we believe that certain adverse credit conditions exist or if a bond becomes
taxable.

If we maintain a secondary market in units but are unable to sell the units that
we buy in the secondary market, we will redeem units, which may affect the
composition of the portfolio. Units offered in the secondary market may not
represent the same face amount of bonds that they did originally.

We decide whether or not to offer units for sale that we acquire in the
secondary market after reviewing:
  - diversity of the portfolio;
  - size of the Fund relative to its original size;
  - ratio of Fund expenses to income;
  - current and long-term returns;
  - degree to which units may be selling at a premium over par; and
  - cost of maintaining a current prospectus.

FUND TERMINATION

The Fund will terminate following the stated maturity or sale of the last bond
in the portfolio. The Fund may also terminate earlier with the consent of
investors holding 51% of the units or if total assets of the Fund have fallen
below 40% of the face amount of bonds deposited. We will decide whether to
terminate the Fund early based on the same factors used in deciding whether or
not to offer units in the secondary market.

When the Fund is about to terminate you will receive a notice, and you will be
unable to sell your units after that time. On or shortly before termination, we
will sell any remaining bonds, and you will receive your final distribution. Any
bond that cannot be sold at a reasonable price may continue to be held by the
Trustee in a liquidating trust pending its final sale.

You will pay your share of the expenses associated with termination, including
brokerage costs in selling bonds. This may reduce the amount you receive as your
final distribution.

                                       11
<PAGE>
CERTIFICATES

Certificates for units are issued on request. You may transfer certificates by
complying with the requirements for redeeming certificates, described above. You
can replace lost or mutilated certificates by delivering satisfactory indemnity
and paying the associated costs.

TRUST INDENTURE

The Fund is a "unit investment trust" governed by a Trust Indenture, a contract
among the Sponsors, the Trustee and the Evaluator, which sets forth their duties
and obligations and your rights. A copy of the Indenture is available to you on
request to the Trustee. The following summarizes certain provisions of the
Indenture.

The Sponsors and the Trustee may amend the Indenture without your consent:
  - to cure ambiguities;
  - to correct or supplement any defective or inconsistent provision;
  - to make any amendment required by any governmental agency; or
  - to make other changes determined not to be materially adverse to your best
    interest (as determined by the Sponsors).

Investors holding 51% of the units may amend the Indenture. Every investor must
consent to any amendment that changes the 51% requirement. No amendment may
reduce your interest in the Fund without your written consent.

The Trustee may resign by notifying the Sponsors. The Sponsors may remove the
Trustee without your consent if:
  - it fails to perform its duties and the Sponsors determine that its
    replacement is in your best interest; or
  - it becomes incapable of acting or bankrupt or its affairs are taken over by
    public authorities.

Investors holding 51% of the units may remove the Trustee. The Evaluator may
resign or be removed by the Sponsors and the Trustee without the consent of
investors. The resignation or removal of either becomes effective when a
successor accepts appointment. The Sponsors will try to appoint a successor
promptly; however, if no successor has accepted within 30 days after notice of
resignation, the resigning Trustee or Evaluator may petition a court to appoint
a successor.

Any Sponsor may resign as long as one Sponsor with a net worth of $2 million
remains and agrees to the resignation. The remaining Sponsors and the Trustee
may appoint a replacement. If there is only one Sponsor and it fails to perform
its duties or becomes bankrupt the Trustee may:
  - remove it and appoint a replacement Sponsor;
  - liquidate the Fund; or
  - continue to act as Trustee without a Sponsor.

Merrill Lynch, Pierce, Fenner & Smith Incorporated acts as agent for the
Sponsors.

The Trust Indenture contains customary provisions limiting the liability of the
Trustee, the Sponsors and the Evaluator.

LEGAL OPINION

Davis Polk & Wardwell, 450 Lexington Avenue, New York, New York 10017, as
special counsel for the Sponsors, has given an opinion that the units are
validly issued.

                                       12
<PAGE>
AUDITORS

Deloitte & Touche LLP, 2 World Financial Center, New York, New York 10281,
independent accountants, audited the Statement of Condition included in this
prospectus.

SPONSORS

The Sponsors are:
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED (a wholly-owned subsidiary of
Merrill Lynch & Co., Inc.)
P.O. Box 9051,
Princeton, NJ 08543-9051
SALOMON SMITH BARNEY INC. (an indirectly wholly-owned subsidiary of Citigroup
Inc.)
388 Greenwich Street--23rd Floor,
New York, NY 10013
DEAN WITTER REYNOLDS INC. (a principal operating subsidiary of Morgan Stanley
Dean Witter & Co.)
Two World Trade Center--59th Floor,
New York, NY 10048
PAINEWEBBER INCORPORATED (a wholly-owned subsidiary of PaineWebber Group Inc.)
1285 Avenue of the Americas,
New York, NY 10019

Each Sponsor is a Delaware corporation and it, or its predecessor, has acted as
sponsor to many unit investment trusts. As a registered broker-dealer each
Sponsor buys and sells securities (including investment company shares) for
others (including investment companies) and participates as an underwriter in
various selling groups.

TRUSTEE

The Bank of New York, 101 Barclay Street,
17 W, New York, New York 10268, is the Trustee. It is supervised by the Federal
Deposit Insurance Corporation, the Board of Governors of the Federal Reserve
System and New York State banking authorities.

UNDERWRITERS' AND SPONSORS' PROFITS

Underwriters receive sales charges when they sell units. The Sponsors also
realized a profit or loss on the initial deposit of the bonds. Any cash made
available by you to the Sponsors before the settlement date for those units may
be used in the Sponsors' businesses to the extent permitted by federal law and
may benefit the Sponsors.

A Sponsor or Underwriter may realize profits or sustain losses on bonds in the
Fund which were acquired from underwriting syndicates of which it was a member.

In maintaining a secondary market, the Sponsors will also realize profits or
sustain losses in the amount of any difference between the prices at which they
buy units and the prices at which they resell or redeem them.

PUBLIC DISTRIBUTION

The Sponsors do not intend to qualify units for sale in any foreign countries.
This prospectus does not constitute an offer to sell units in any country where
units cannot lawfully be sold.

CODE OF ETHICS

The Fund and the Agent for the Sponsors have each adopted a code of ethics
requiring reporting of personal securities transactions by its employees with
access to information on Fund transactions. Subject to certain conditions, the
codes permit employees to invest in Fund securities for their own accounts. The
codes are designed to prevent fraud, deception and misconduct against the Fund
and to provide reasonable standards of

                                       13
<PAGE>
conduct. These codes are on file with the Commission and you may obtain a copy
by contacting the Commission at the address listed on the back cover of this
prospectus.

YEAR 2000 ISSUES

Many computer systems were designed in such a way that they may be unable to
distinguish between the year 2000 and the year 1900 (commonly known as the "Year
2000 Problem"). To date we are not aware of any major operational difficulties
resulting from the computer system changes necessary to prepare for the Year
2000. However, there can be no assurance that the Year 2000 Problem will not
adversely affect the issuers of the bonds contained in the Portfolio. We cannot
predict whether any impact will be material to the Fund as a whole.

TAXES

The following summary describes some of the important income tax consequences of
holding units. It assumes that you are not a dealer, financial institution,
insurance company or other investor with special circumstances. You should
consult your own tax adviser about your particular circumstances.

In the opinion of our counsel, under existing law:

GENERAL TREATMENT OF THE FUND AND YOUR INVESTMENT

The Fund will not be taxed as a corporation for federal income tax purposes, and
you will be considered to own directly your share of each bond in the Fund.

You will be considered to receive your share of any interest paid (or any
original issue discount accrued) when this interest is received (or original
issue discount is accrued) by the Portfolio. Interest (and original issued
discount, if any) will be taxed at ordinary income rates. You should consult
your tax adviser in this regard.

GAIN OR LOSS UPON DISPOSITION

When all or part of your share of a bond is disposed of (for example, when the
Fund sells, exchanges or redeems a bond or when you sell or exchange your
units), you will generally recognize capital gain or loss. Your gain, however,
will generally be ordinary income to the extent of any accrued "market
discount". Generally you will have market discount to the extent that your basis
in a bond when you purchase a unit is less than its stated redemption price at
maturity (or, if it is an original issue discount bond, the issue price
increased by original issue discount that has accrued on the bond before your
purchase). You should consult your tax adviser in this regard.

If your net long-term capital gains exceed your net short-term capital losses,
the excess may be subject to tax at a lower rate than ordinary income. Any
capital gain from the Fund will be long-term if you are considered to have held
your investment on each bond for more than one year and short-term otherwise.
Because the deductibility of capital losses is subject to limitations, you may
not be able to deduct all of your capital losses. You should consult your tax
adviser in this regard.

YOUR BASIS IN THE BONDS

Your aggregate basis in the bonds and the related insurance contracts will be
equal to the cost of your units, including any sales charges and the
organizational expenses you pay, adjusted to reflect any accruals of "original
issue discount," "acquisition

                                       14
<PAGE>
premium" and "bond premium". You should consult your tax adviser in this regard.

EXPENSES

If you are an individual who itemizes deductions, you may deduct your share of
Fund expenses, but only to the extent that such amount, together with your other
miscellaneous deductions, exceeds 2% of your adjusted gross income. Your ability
to deduct Fund expenses will be limited further if your adjusted gross income
exceeds a specified amount, currently $128,950 ($64,475 for a married person
filing separately).

FOREIGN INVESTORS

If you are a foreign investor and you are not engaged in a U.S. trade or
business, you generally will be subject to U.S. federal income tax, including
withholding tax, on the interest or gain on a bond issued after July 18, 1984 if
you meet certain requirements, including the certification of foreign status and
other matters. You should consult your tax adviser about the possible
application of federal, state and local, and foreign taxes.

STATE AND LOCAL TAXES

Depending on where you live, income on some of the bonds may be exempt from
state and local taxation. You should consult your tax adviser in this regard.

RETIREMENT PLANS

You may wish to purchase units for an Individual Retirement Account (IRA) or
other retirement plan. Generally, capital gains and income received in each of
these plans are exempt from federal taxation. All distributions from such plans
are generally treated as ordinary income but may, in some cases, be eligible for
tax-deferred rollover treatment. You should consult your attorney or tax adviser
about the specific tax rules relating to these plans offered by brokerage firms,
including the Sponsor of this Fund and other financial institutions. Fees and
charges with respect to such plans may vary.

SUPPLEMENTAL INFORMATION

You can receive at no cost supplemental information about the Fund by calling
the Trustee. The supplemental information includes more detailed risk disclosure
about the types of bonds that may be in the Fund's portfolio, general risk
disclosure concerning any insurance securing certain bonds, and general
information about the structure and operation of the Fund. The supplemental
information is also available from the SEC.

                                       15
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
TAXABLE INSURED SERIES - 1,
DEFINED ASSET FUNDS

REPORT OF INDEPENDENT ACCOUNTANTS

The Sponsors, Trustee and Holders
  of Municipal Investment Trust Fund,
  Taxable Insured Series - 1,
  Defined Asset Funds:

We have audited the accompanying statement of condition of Municipal
Investment Trust Fund, Taxable Insured Series - 1, Defined Asset
Funds, including the portfolio, as of December 31, 1999 and the
related statements of operations and of changes in net assets for the
period January 30, 1999 to December 31, 1999. These financial
statements are the responsibility of the Trustee. Our responsibility
is to express an opinion on these financial statements based on our
audit.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit
to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the
financial statements. Securities owned at December 31, 1999, as shown
in such portfolio, were confirmed to us by The Bank of New York, the
Trustee. An audit also includes assessing the accounting principles
used and significant estimates made by the Trustee, as well as
evaluating the overall financial statement presentation. We believe
that our audit provides a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present
fairly, in all material respects, the financial position of Municipal
Investment Trust Fund, Taxable Insured Series - 01, Defined Asset
Funds at December 31, 1999 and the results of its operations and
changes in its net assets for the above-stated period in conformity
with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

New York, N.Y.
March 3, 2000


                                     D - 1
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND
TAXABLE INSURED SERIES - 1,
DEFINED ASSET FUNDS

STATEMENT OF CONDITION
AS OF DECEMBER 31, 1999

<TABLE>
<S>                                             <C>       <C>
TRUST PROPERTY:
  Investment in marketable securities - at value
  (cost $10,205,978)(Note 1).....................             $8,743,866
  Accrued interest receivable....................                204,848
  Cash...........................................                 51,094
                                                             _____________

              Total trust property...............              8,999,808

LESS LIABILITIES:
  Deferred sales charge (Note 5).................  $   71,400
  Accrued expenses...............................       4,893     76,293
                                                _____________ ____________

NET ASSETS, REPRESENTED BY:
  10,000,000 units of fractional undivided
    interest outstanding (Note 3)................  8,672,466
  Undistributed net investment income............    251,049
                                                _____________
                                                              $8,923,515
                                                              =============
UNIT VALUE ($8,923,515/10,000,000 units).........                  $0.89
                                                              =============
</TABLE>

                       See Notes to Financial Statements.


                                     D - 2
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
TAXABLE INSURED SERIES - 1,
DEFINED ASSET FUNDS

STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>
                                              January 30,
                                              1999
                                                  to
                                             December 31,
                                                 1999
                                             _____________
<S>                                        <C>
INVESTMENT INCOME:
  Interest income...........................  $   601,133
  Trustee's fees and expenses...............       (7,719)
  Sponsors' fees............................       (3,164)
                                             _____________
  Net investment income.....................      590,250

UNREALIZED DEPRECIATION OF INVESTMENTS......   (1,462,112)
                                             _____________

NET DECREASE IN NET ASSETS RESULTING
  FROM OPERATIONS...........................  $  (871,862)
                                             =============
</TABLE>

                       See Notes to Financial Statements.


                                     D - 3
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
TAXABLE INSURED SERIES - 1,
DEFINED ASSET FUNDS

STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                January 30,
                                                   1999
                                                    to
                                               December 31,
                                                   1999
                                               _____________
<S>                                          <C>
OPERATIONS:
  Net investment income.......................  $   590,250
  Unrealized depreciation of investments......   (1,462,112)
                                               _____________
  Net decrease in net assets resulting
    from operations...........................     (871,862)

INCOME DISTRIBUTIONS TO HOLDERS (Note 2)......     (339,201)

DEFERRED SALES CHARGE (Note 5)................      (71,400)
                                               _____________
NET DECREASE IN NET ASSETS....................   (1,282,463)

NET ASSETS AT BEGINNING OF PERIOD.............   10,205,978
                                               _____________
NET ASSETS AT END OF PERIOD...................  $ 8,923,515
                                               =============
PER UNIT:
  Income distributions during period..........        $0.03
                                               =============
  Net asset value at end of period............        $0.89
                                               =============
TRUST UNITS OUTSTANDING AT END OF PERIOD......   10,000,000
                                               =============
</TABLE>

            See Notes to Financial Statements.


                                     D - 4
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
TAXABLE INSURED SERIES - 1,
DEFINED ASSET FUNDS

NOTES TO FINANCIAL STATEMENTS

  1.  SIGNIFICANT ACCOUNTING POLICIES

      The Fund is registered under the Investment Company Act of 1940 as
      a Unit Investment Trust. The following is a summary of significant
      accounting policies consistently followed by the Fund in the
      preparation of its financial statements. The policies are in
      conformity with generally accepted accounting principles.

      (a) Securities are stated at value as determined by the Evaluator
          based on bid side evaluations for the securities, except that value
          on January 30, 1999 was based upon offer side evaluations at January
          28, 1999 the day prior to the Date of Deposit. Cost of securities at
          January 30, 1999 was also based on such offer side evaluations.

      (b) The Fund is not subject to income taxes. Accordingly, no
          provision for such taxes is required.

      (c) Interest income is recorded as earned.

  2.  DISTRIBUTIONS

      Distributions of net investment income are made semi-annually.
      Receipts other than interest, after deductions for redemptions
      and applicable expenses, are also distributed periodically.

  3.  NET CAPITAL

<TABLE>
<S>                                                      <C>
      Cost of 10,000,000 units at Date of Deposit.........   $10,205,978
      Deferred sales charge...............................       (71,400)
      Unrealized depreciation of investments..............    (1,462,112)
                                                           ______________

      Net capital applicable to Holders...................   $ 8,672,466
                                                           ==============
</TABLE>

  4.  INCOME TAXES

      As of December 31, 1999, unrealized depreciation of investments, based
      on cost for Federal income tax purposes, aggregated $1,462,112, all of
      which related to depreciated securities. The cost of investment
      securities for Federal income tax purposes was $10,205,978 at
      December 31, 2099.

  5.  DEFERRED SALES CHARGE

      A deferred sales fee of $19.00 per 1,000 Units is payable over a two-
      year period ($2.38 per 1,000 Units quarterly in the first year and $2.37
      per 1,000 quarterly in the second year).


                                     D - 5
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
TAXABLE INSURED SERIES -  1,
DEFINED ASSET FUNDS

PORTFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                          Rating                                      Optional
    Portfolio No. and Title of              of            Face                        Redemption
            Securities(4)                Issues(1)       Amount  Coupon Maturities(3) Provisions(3)          Cost(2)      Value(2)
            _____________                _________       ______  ______ _____________ _____________          _______      ________
<S>                                      <C>       <C>           <C>       <C>        <C>            <C>           <C>
 1 City of Chelsea, MA, G.O. State         AAA       $1,000,000   6.350%   2019       03/01/09              $1,003,870   $878,410
   Qualified Bonds, Ser. 1999 B                                                       @ 101.000
   (MBIA Ins.)

 2 City of Worcester, MA, G.O. Bonds,      AAA        1,000,000   6.250    2028       None                986,770       833,660
   Pension Funding Loan of 1998
   (FSA Ins.)

 3 County of Union, PA, G.O. Bonds,        Aaa(2)     1,000,000   6.500    2025       11/01/08          1,000,000       838,020
   Series 1998 A (AMBAC Ins.)                                                         @ 100.000

 4 Unified Govt. of Wyandotte Cnty.,       AAA        1,000,000   6.750    2027       None               987,370         865,810
   Kansas City, KS, Taxable Spec.
   Oblig. Rev. Bonds (Kansas Intl.
   Speedway Corp., Proj.), Ser. 1999
   (MBIA Ins.)

 5 City of Phoenix, AZ, Civic Imp.         AAA        1,000,000   6.000    2019       07/01/08           976,950         836,100
   Corp., Excise Tax Rev. Rfdg. Bonds                                                 @ 101.000
   (Municipal Multipurpose Arena),
   Ser. 1998 (MBIA Ins.)

 6 San Dieguito, CA, Pub. Fac. Auth.,      AAA        1,000,000   7.000    2018       08/01/08         1,031,890         893,950
   Rev. Bonds, Ser. 1998 B                                                            @ 102.000
   (AMBAC Ins.)

 7 City of Dallas, TX, Spec. Tax and       AAA        1,000,000   6.625    2027       08/15/08         1,005,960         855,120
   Lease Rev. Bonds, (Sports Arena                                                    @ 101.000
   Proj.) Ser. 1998 B (AMBAC Ins.)

 8 Alameda, CA, Corridor Trans. Auth.,     AAA        1,000,000   6.500    2019       None             1,005,540         871,430
   Taxable Senior Lien Rev. Bonds,
   Ser 1999 C (MBIA Ins.)
</TABLE>

                                                                 D - 6

<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
TAXABLE INSURED SERIES -  1,
DEFINED ASSET FUNDS

PORTFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                          Rating                                      Optional
    Portfolio No. and Title of              of            Face                        Redemption
            Securities(4)                Issues(1)       Amount  Coupon Maturities(3) Provisions(3)          Cost(2)      Value(2)
            _____________                _________       ______  ______ _____________ _____________          _______      ________
<S>                                      <C>       <C>           <C>       <C>        <C>            <C>           <C>
 9 City of Philadelphia, PA, Auth. For     AAA       $1,000,000   6.350%   2028       None                $1,013,230      $836,280
   Ind. Dev., Pension Funding Bonds
   (City of Philadelphia Retirement
   Sys.), Ser. 1999 A (FSA Ins.)

10 City of Philadelphia, PA, Auth. For     AAA           70,000   5.050    2000       None                   70,076          69,805
   Ind. Dev., Pension Funding Bonds                     110,000   5.180    2001       None                  110,172         108,134
   (City of Philadelphia Retirement
   Sys.), Ser. 1999 A (FSA Ins.)(5)

11 Middlesex Cnty. Imp. Auth., NJ,         AAA           10,000   5.230    2000       None                  10,080            9,927
   Util. Sys. Rev. Bonds (Perth Amboy
   Franchise Acquisition Proj.),
   Ser. C (AMBAC Ins.)(5)

12 Middlesex Cnty. Imp. Auth., NJ,         AAA        1,000,000   6.000    2013       09/01/09           1,004,070          847,220
   Util. Sys. Rev. Bonds (Perth Amboy                                                 @ 101.000
   Franchise Acquisition Proj.),
   Ser. C (AMBAC Ins.)
                                                  ______________                                    ______________    ______________
TOTAL                                               $10,190,000                                        $10,205,978       $8,743,866
                                                  ==============                                    ==============    ==============
</TABLE>

        See Notes to Portfolio.


                                     D - 6
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
TAXABLE INSURED SERIES - 1,
DEFINED ASSET FUNDS

NOTES TO PORTFOLIO
AS OF DECEMBER 31, 1999

   (1) The ratings of the bonds are by Standard & Poor's Ratings
       Group, or by Moody's Investors Service, Inc. if followed by
       "(m)", or by Fitch Investors Service, Inc. if followed by
       "(f)"; "NR" indicates that this bond is not currently rated by
       any of the above-mentioned rating services. These ratings have
       been furnished by the Evaluator but not confirmed with
       the rating agencies.

   (2) See Notes to Financial Statements.

   (3) Optional redemption provisions, which may be exercised in whole
       or in part, are initially at prices of par plus a premium, then
       subsequently at prices declining to par. Certain securities may
       provide for redemption at par prior or in addition to any
       optional or mandatory redemption dates or maturity, for
       example, through the operation of a maintenance and replacement
       fund, if proceeds are not able to be used as contemplated, the
       project is condemned or sold or the project is destroyed and
       insurance proceeds are used to redeem the securities. Many of
       the securities are also subject to mandatory sinking fund
       redemption commencing on dates which may be prior to the date
       on which securities may be optionally redeemed. Sinking fund
       redemptions are at par and redeem only part of the issue. Some
       of the securities have mandatory sinking funds which contain
       optional provisions permitting the issuer to increase the
       principal amount of securities called on a mandatory redemption
       date. The sinking fund redemptions with optional provisions
       may, and optional refunding redemptions generally will, occur
       at times when the redeemed securities have an offering side
       evaluation which represents a premium over par. To the extent
       that the securities were acquired at a price higher than the
       redemption price, this will represent a loss of capital when
       compared with the Public Offering Price of the Units when
       acquired. Distributions will generally be reduced by the amount
       of the income which would otherwise have been paid with respect
       to redeemed securities and there will be distributed to Holders
       any principal amount and premium received on such redemption
       after satisfying any redemption requests for Units received by
       the Fund. The estimated current return may be affected by
       redemptions.

   (4) All Securities are insured either on an individual basis or by
       portfolio insurance, by a municipal bond insurance company
       which has been assigned "AAA" claims paying ability by
       Standard & Poor's. Accordingly, Standard & Poor's has assigned
       "AAA" ratings to the Securities. Securities covered by
       portfolio insurance are rated "AAA" only as long as they
       remain in this Trust.

   (5) It is anticipated that principal received from these bonds will be
       applied to the payment of the Trust's deferred sales charges.


                                     D - 7
<PAGE>
DEFINED ASSET FUNDS-SM-

<TABLE>
<S>                                      <C>
HAVE QUESTIONS ?                         INSURED TAXABLE FUND
Request the most recent free             (A Unit Investment Trust)
Information Supplement                   ---------------------------------------
that gives more details about            This Prospectus does not contain
the Fund, by calling:                    complete information about the
The Bank of New York                     investment company filed with the
1-800-221-7771                           Securities and Exchange Commission in
                                         Washington, D.C. under the:
                                         - Securities Act of 1933 (file no.
                                         333-68827) and
                                         - Investment Company Act of 1940 (file
                                         no. 811-2537).
                                         TO OBTAIN COPIES AT PRESCRIBED RATES--
                                         WRITE: Public Reference Section of the
                                         Commission
                                         450 Fifth Street, N.W., Washington,
                                         D.C. 20549-6009
                                         CALL: 1-800-SEC-0330.
                                         VISIT: http://www.sec.gov.
                                         ---------------------------------------
                                         No person is authorized to give any
                                         information or representations about
                                         this Fund not contained in this
                                         Prospectus or the Information
                                         Supplement, and you should not rely on
                                         any other information.
                                         ---------------------------------------
                                         When units of this Fund are no longer
                                         available, this Prospectus may be used
                                         as a preliminary prospectus for a
                                         future series, but some of the
                                         information in this Prospectus will be
                                         changed for that series.
                                         UNITS OF ANY FUTURE SERIES MAY NOT BE
                                         SOLD NOR MAY OFFERS TO BUY BE ACCEPTED
                                         UNTIL THAT SERIES HAS BECOME EFFECTIVE
                                         WITH THE SECURITIES AND EXCHANGE
                                         COMMISSION. NO UNITS CAN BE SOLD IN ANY
                                         STATE WHERE A SALE WOULD BE ILLEGAL.
                                                                     32741--3/00
</TABLE>



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