MUNICIPAL INVESTMENT TR FD MULTISTATE SER 315 DEF ASSET FDS, 485BPOS, 1999-11-12

MUNICIPAL INVESTMENT TR FD MULTISTATE SER 315 DEF ASSET FDS
485BPOS, 1999-11-12

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<PAGE>
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 10, 1999

REGISTRATION NO. 333-29283
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- --------------------------------------------------------------------------------

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

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

POST-EFFECTIVE AMENDMENT NO. 2
TO
FORM S-6

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

FOR REGISTRATION UNDER THE SECURITIES ACT
OF 1933 OF SECURITIES OF UNIT INVESTMENT
TRUSTS REGISTERED ON FORM N-8B-2

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

A. EXACT NAME OF TRUST:

MUNICIPAL INVESTMENT TRUST FUND
MULTISTATE SERIES--315
DEFINED ASSET FUNDS

B. NAMES OF DEPOSITORS:

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
SALOMON SMITH BARNEY INC.
PRUDENTIAL SECURITIES INCORPORATED
PAINEWEBBER INCORPORATED
DEAN WITTER REYNOLDS INC.

C. COMPLETE ADDRESSES OF DEPOSITORS' PRINCIPAL EXECUTIVE OFFICES:

MERRILL LYNCH, PIERCE,
FENNER & SMITH
INCORPORATED
DEFINED ASSET FUNDS
POST OFFICE BOX 9051
PRINCETON, NJ 08543-9051 SALOMON SMITH BARNEY INC.
388 GREENWICH
STREET--23RD FLOOR
NEW YORK, NY 10013

PRUDENTIAL SECURITIES PAINEWEBBER INCORPORATED DEAN WITTER REYNOLDS INC.
INCORPORATED 1285 AVENUE OF THE TWO WORLD TRADE
ONE NEW YORK PLAZA AMERICAS CENTER--59TH FLOOR
NEW YORK, NY 10292 NEW YORK, NY 10019 NEW YORK, NY 10048

D. NAMES AND COMPLETE ADDRESSES OF AGENTS FOR SERVICE:

TERESA KONCICK, ESQ. ROBERT E. HOLLEY MICHAEL KOCHMANN
P.O. BOX 9051 1200 HARBOR BLVD. 388 GREENWICH ST.
PRINCETON, NJ 08543-9051 WEEHAWKEN, NJ 07087 NEW YORK, NY 10013

LEE B. SPENCER, JR. COPIES TO: DOUGLAS LOWE, ESQ.
ONE NEW YORK PLAZA PIERRE DE SAINT PHALLE, DEAN WITTER REYNOLDS INC.
NEW YORK, NY 10292 ESQ. TWO WORLD TRADE
450 LEXINGTON AVENUE CENTER--59TH FLOOR
NEW YORK, NY 10017 NEW YORK, NY 10048

The issuer has registered an indefinite number of Units under the Securities Act
of 1933 pursuant to Rule 24f-2 and filed the Rule 24f-2 Notice for the most
recent fiscal year on March 9, 1999.

Check box if it is proposed that this filing will become effective on November
19, 1999 pursuant to paragraph (b) of Rule 485. / x /

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<PAGE>
<PAGE>
DEFINED ASSET FUNDSSM
- --------------------------------------------
- ----------------------------------

MUNICIPAL INVESTMENT TRUST FUND
MULTISTATE SERIES--315
(A UNIT INVESTMENT TRUST)
O FLORIDA AND NEW YORK PORTFOLIOS
O PORTFOLIOS OF LONG-TERM MUNICIPAL BONDS
O DESIGNED FOR INCOME FREE FROM REGULAR FEDERAL
INCOME TAX
O EXEMPT FROM SOME STATE TAXES
O MONTHLY DISTRIBUTIONS

SPONSORS:
Merrill Lynch,
Pierce, Fenner & Smith -------------------------------------------------
Incorporated The Securities and Exchange Commission has not
Salomon Smith Barney Inc. approved or disapproved these Securities or
Prudential Securities passed upon the adequacy of this prospectus. Any
Incorporated representation to the contrary is a criminal
PaineWebber Incorporated offense.
Dean Witter Reynolds Inc. Prospectus dated November 19, 1999.

<PAGE>
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Def ined Asset FundsSM
Defined Asset FundsSM 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:
o A disciplined strategy of buying and holding with a long-term view is the
cornerstone of Defined Asset Funds.
o Fixed portfolio: Defined Funds follow a buy and hold investment strategy;
funds are not managed and portfolio changes are limited.
o Defined Portfolios: We choose the stocks and bonds in advance, so you know
what you're investing in.
o Professional research: Our dedicated research team seeks out stocks or bonds
appropriate for a particular fund's objectives.
o 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 JULY 31, 1999, THE
EVALUATION DATE.

CONTENTS
PAGE
-----------
Florida Insured Portfolio--
Risk/Return Summary.................................. 3
New York Portfolio--Risk/Return Summary................. 6
What You Can Expect From Your Investment................ 10
Monthly Income....................................... 10
Return Figures....................................... 10
Records and Reports.................................. 10
The Risks You Face...................................... 11
Interest Rate Risk................................... 11
Call Risk............................................ 11
Reduced Diversification Risk......................... 11
Liquidity Risk....................................... 11
Concentration Risk................................... 11
State Concentration Risk............................. 12
Bond Quality Risk.................................... 13
Insurance Related Risk............................... 13
Litigation and Legislation Risks..................... 13
Selling or Exchanging Units............................. 13
Sponsors' Secondary Market........................... 14
Selling Units to the Trustee......................... 14
Exchange Option...................................... 15
How The Fund Works...................................... 15
Pricing.............................................. 15
Evaluations.......................................... 15
Income............................................... 15
Expenses............................................. 15
Portfolio Changes.................................... 16
Fund Termination..................................... 16
Certificates......................................... 17
Trust Indenture...................................... 17
Legal Opinion........................................ 18
Auditors............................................. 18
Sponsors............................................. 18
Trustee.............................................. 18
Underwriters' and Sponsors' Profits 19
Public Distribution.................................. 19
Code of Ethics....................................... 19
Year 2000 Issues..................................... 19
Taxes................................................... 19
Supplemental Information................................ 21
Financial Statements.................................... D-1

2
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FLORIDA INSURED PORTFOLIO--RISK/RETURN SUMMARY

1. WHAT IS THE FUND'S OBJECTIVE?
The Fund seeks interest income that is exempt from regular
federal income taxes and some state and local taxes by
investing in a fixed portfolio consisting primarily of
insured, long term municipal revenue bonds.
2. WHAT ARE MUNICIPAL REVENUE BONDS?
Municipal revenue bonds are bonds issued by states,
municipalities and public authorities to finance the cost
of buying, building or improving various projects intended
to generate revenue, such as airports, health care
facilities, housing and municipal electric, water and sewer
utilities. Generally, payments on these bonds depend solely
on the revenues generated by the projects, excise taxes or
state appropriations, and are not backed by the
government's taxing power.

3. WHAT IS THE FUND'S INVESTMENT STRATEGY?
O The Fund plans to hold to maturity 8 long-term tax-exempt
municipal bonds, and some short-term bonds reserved to pay
the deferred sales fee, with an aggregate face amount of
$3,675,000.
o The Fund is a unit investment trust which means that,
unlike a mutual fund, the Portfolio is not managed.
o The bonds are rated AAA or Aaa by Standard & Poor's,
Moody's or Fitch.
o Many of the bonds can be called at a premium declining over
time to par value. Some bonds may be called earlier at par
for extraordinary reasons.
o 100% of the bonds are insured by 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 municipal bonds of the following
types:

APPROXIMATE
PORTFOLIO
PERCENTAGE

/ / General Obligation 2%
/ / Hospital/Health Care 27%
/ / Housing 4%
/ / Municipal Water/Sewer Utilities 26%
/ / Refunded Bonds 23%
/ / Stadium 18%

4. WHAT ARE THE SIGNIFICANT RISKS?
YOU CAN LOSE MONEY BY INVESTING IN THE FUND. THIS CAN
HAPPEN FOR VARIOUS REASONS, INCLUDING:
o Rising interest rates, an issuer's worsening financial
condition or a drop in bond ratings can reduce the price of
your units.
o Because the Fund is concentrated in hospital/health care
and municipal water/sewer utility bonds, adverse
developments in these sectors may affect the value of your
units.
o 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.
o 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.

ALSO, THE PORTFOLIO IS CONCENTRATED IN BONDS OF FLORIDA SO
IT IS LESS DIVERSIFIED THAN A NATIONAL FUND AND IS SUBJECT
TO RISKS PARTICULAR TO FLORIDA WHICH ARE BRIEFLY DESCRIBED
UNDER STATE CONCENTRATION RISKS LATER IN THIS PROSPECTUS.

3
<PAGE>

5. IS THIS FUND APPROPRIATE FOR YOU?
Yes, if you want federally tax-free income. You will
benefit from a professionally selected and supervised
portfolio whose risk is reduced by investing in insured
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 do not want a tax-advantaged
investment or if you cannot tolerate any risk.

DEFINING YOUR INCOME

WHAT YOU MAY EXPECT (Payable on the 25th day of
the month to holders of record on the 10th day
of the month):
Regular Monthly Income per unit $ 4.12
Annual Income per unit: $ 49.44
These figures are estimates determined on the evaluation
day; actual payments may vary.

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 1.125%, as well as a
deferred sales fee of $3.75 per unit quarterly November,
February, May and August through August, 2000. Employees of
some of the Sponsors and their affiliates may pay a reduced
sales fee of no less than $5.00 per unit.
The maximum sales fee is reduced if you invest at least
$100,000, as follows:

YOUR MAXIMUM
SALES FEE
IF YOU INVEST: WILL BE:
----------------------------------- -----------------
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%

ESTIMATED ANNUAL FUND OPERATING EXPENSES

AMOUNT
PER UNIT
-----------
$ 0.71
Trustee's Fee
$ 0.45
Portfolio Supervision,
Bookkeeping and
Administrative Fees
(including updating
expenses)
$ 0.36
Evaluator's Fee
$ 0.20
Organization Costs
$ 0.50
Other Operating Expenses
-----------
$ 2.22
TOTAL

The Sponsors historically paid organization costs and
updating expenses.
7. HOW HAVE SIMILAR FUNDS PERFORMED IN THE PAST?
In the following chart we show past performance of prior
Florida Portfolios, which had investment objectives,
strategies and types of bonds substantially similar to
this Fund. These prior Series differed in that they
charged a higher sales fee. These prior Florida Series
were offered between August 25, 1988 and December 6, 1996
and were outstanding on June 30, 1999. OF COURSE, PAST
PERFORMANCE OF PRIOR SERIES IS NO GUARANTEE OF FUTURE
RESULTS OF THIS FUND.
AVERAGE ANNUAL COMPOUND TOTAL RETURNS
FOR PRIOR SERIES
Reflecting all expenses. For periods ended 6/30/99.

WITH SALES FEE NO SALES FEE
1 YEAR 5 YEARS 10 YEARS 1 YEAR 5 YEARS 10 YEARS

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

High 3.79% 6.70% 6.01% 4.33% 7.89% 6.49%
Average -0.04 5.17 5.84 3.00 6.22 6.41
Low -3.94 3.80 5.72 1.12 4.65 6.31

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Average
Sales fee 3.11% 5.13% 5.66%

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Note: All returns represent changes in unit price with distributions reinvested
into the Municipal Fund Investment Accumulation Program.

8. 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.

4
<PAGE>

11. HOW ARE DISTRIBUTIONS MADE AND TAXED?
The Fund pays income monthly.
In the opinion of bond counsel when each bond was issued,
interest on the bonds in this Fund is generally 100% exempt
from regular federal income tax. Your income may also be
exempt from some Florida state and local taxes if you live in
Florida.
You will also receive principal payments if bonds are sold or
called or mature, when the cash available is more than $5.00
per unit. You will be subject to tax on any gain realized by
the Fund on the disposition of bonds.
12. WHAT OTHER SERVICES ARE AVAILABLE?
REINVESTMENT
You will receive your income in cash unless you choose to
compound your income by reinvesting at no sales fee in the
Municipal Fund Investment Accumulation Program, Inc. This
program is an open-end mutual fund with a comparable
investment objective, but the bonds will generally not be
insured. Income from this program will generally be subject
to state and local income taxes. 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.

5
<PAGE>
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NEW YORK PORTFOLIO--RISK/RETURN SUMMARY

1. WHAT IS THE FUND'S OBJECTIVE?
The Fund seeks interest income that is exempt from regular
federal income taxes and some state and local taxes by
investing in a fixed portfolio consisting primarily of long
term municipal revenue bonds.
2. WHAT ARE MUNICIPAL REVENUE BONDS?
Municipal revenue bonds are bonds issued by states,
municipalities and public authorities to finance the cost
of buying, building or improving various projects intended
to generate revenue, such as airports, health care
facilities, housing and municipal electric, water and sewer
utilities. Generally, payments on these bonds depend solely
on the revenues generated by the projects, excise taxes or
state appropriations, and are not backed by the
government's taxing power.

3. WHAT IS THE FUND'S INVESTMENT STRATEGY?
O The Fund plans to hold to maturity 7 long-term tax-exempt
municipal bonds, and some short-term bonds reserved to pay
the deferred sales fee, with an aggregate face amount of
$5,255,000.
o The Fund is a unit investment trust which means that,
unlike a mutual fund, the Portfolio is not managed.
o When the bonds were initially deposited they were rated A
or better by Standard & Poor's, Moody's or Fitch. The
quality of the bonds may currently be lower.
o Many of the bonds can be called at a premium declining over
time to par value. Some bonds may be called earlier at par
for extraordinary reasons.

The Portfolio consists of municipal bonds of the following
types:

APPROXIMATE
PORTFOLIO
PERCENTAGE
/ / General Obligation 19%
/ / Hospital/Health Care 34%
/ / Industrial Development Revenue 2%
/ / Lease Rental Appropriation 15%
/ / Municipal Water/Sewer Utilities 14%

4. WHAT ARE THE SIGNIFICANT RISKS?
YOU CAN LOSE MONEY BY INVESTING IN THE FUND. THIS CAN
HAPPEN FOR VARIOUS REASONS, INCLUDING:
o Rising interest rates, an issuer's worsening financial
condition or a drop in bond ratings can reduce the price of
your units.
o Because the Fund is concentrated in hospital/health care
bonds, adverse developments in this sector may affect the
value of your units.
o 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.
o 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.

ALSO, THE PORTFOLIO IS CONCENTRATED IN BONDS OF NEW YORK SO
IT IS LESS DIVERSIFIED THAN A NATIONAL FUND AND IS SUBJECT
TO RISKS PARTICULAR TO NEW YORK WHICH ARE BRIEFLY DESCRIBED
UNDER STATE CONCENTRATION RISKS LATER IN THIS PROSPECTUS.

6
<PAGE>

5. IS THIS FUND APPROPRIATE FOR YOU?
Yes, if you want federally tax-free 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 do not want a tax-advantaged
investment or if you cannot tolerate any risk.

DEFINING YOUR INCOME

WHAT YOU MAY EXPECT (Payable on the 25th day of
the month to holders of record on the 10th day
of the month):
Regular Monthly Income per unit $ 4.28
Annual Income per unit: $ 51.38
These figures are estimates determined on the evaluation
day; actual payments may vary.

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 1.125% as well as a
deferred sales fee of $3.75 per unit quarterly November,
February, May and August, through August, 2000.
Employees of some of the Sponsors and their affiliates may
be charged a reduced sales fee of no less than $5.00 per
unit.
The maximum sales fee is reduced if you invest at least
$100,000, as follows:

Maximum Exchange Fee 1.90%

ESTIMATED ANNUAL FUND OPERATING EXPENSES

AMOUNT
PER UNIT
-----------
$ 0.70
Trustee's Fee
$ 0.45
Portfolio Supervision,
Bookkeeping and
Administrative Fees
(including updating
expenses)
$ 0.25
Evaluator's Fee
$ 0.20
Organization Costs
$ 0.47
Other Operating Expenses
-----------
$ 2.07
TOTAL

The Sponsors historically paid organization costs and
updating expenses.
7. HOW HAVE SIMILAR FUNDS PERFORMED IN THE PAST?
In the following chart we show past performance of prior
New York Portfolios, which had investment objectives,
strategies and types of bonds substantially similar to
this Fund. These prior Series differed in that they
charged a higher sales fee. These prior New York Series
were offered between January 14, 1988 and October 16, 1996
and were outstanding on June 30, 1999. OF COURSE, PAST
PERFORMANCE OF PRIOR SERIES IS NO GUARANTEE OF FUTURE
RESULTS OF THIS FUND.
AVERAGE ANNUAL COMPOUND TOTAL RETURNS
FOR PRIOR SERIES
Reflecting all expenses. For periods ended 6/30/99.

WITH SALES FEE NO SALES FEE
1 YEAR 5 YEARS 10 YEARS 1 YEAR 5 YEARS 10 YEARS

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

High 3.57% 6.80% 6.38% 5.48% 8.00% 6.98%
Average -0.08 4.94 6.08 2.91 5.94 6.67
Low -3.92 3.62 5.85 -0.57 4.51 6.44

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

Average
Sales fee 3.05% 4.94% 5.78%

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

Note: All returns represent changes in unit price with distributions reinvested
into the Municipal Fund Investment Accumulation Program.

7
<PAGE>

9. HOW DO I BUY UNITS?
The minimum investment is one unit.
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.
UNIT PRICE PER UNIT $986.71
(as of July 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. 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.
10. 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. You will not pay any other
fee when you sell your units.
11. HOW ARE DISTRIBUTIONS MADE AND TAXED?
The Fund pays income monthly.
In the opinion of bond counsel when each bond was issued,
interest on the bonds in this Fund is generally 100% exempt
from regular federal income tax. Your income may also be
exempt from some New York state and local personal income
taxes if you live in New York.
You will also receive principal payments if bonds are sold
or called or mature, when the cash available is more than
$5.00 per unit. You will be subject to tax on any gain
realized by the Fund on the disposition of bonds.

12. WHAT OTHER SERVICES ARE AVAILABLE?
REINVESTMENT
You will receive your income in cash unless you choose to
compound your income by reinvesting at no sales fee in the
Municipal Fund Investment Accumulation Program, Inc. This
program is an open-end mutual fund with a comparable
investment objective. Income from this program will
generally be subject to state and local income taxes. 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.

8
<PAGE>
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TAX-FREE VS. TAXABLE INCOME: A COMPARISON OF TAXABLE AND TAX-FREE YIELDS

FOR FLORIDA RESIDENTS
- --------------------------------------------------------------------------------

EFFECTIVE
TAXABLE INCOME 1999* TAX RATE TAX-FREE YIELD OF
SINGLE RETURN JOINT RETURN % 3% 3.5% 4% 4.5% 5% 5.5% 6% 6.5% 7%
IS EQUIVALENT TO A TAXABLE YIELD OF

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

<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
$ 0- 25,750 $ 0- 43,050 15.00 3.53 4.12 4.71 5.29 5.88 6.47 7.06 7.65 8.24
$ 27,751- 62,450 $ 43,051-104,050 28.00 4.17 4.86 5.56 6.25 6.94 7.64 8.33 9.03 9.72
$ 62,451-130,250 $104,051-158,550 31.00 4.35 5.07 5.80 6.52 7.25 7.97 8.70 9.42 10.14
$130,251-283,150 $158,551-283,150 36.00 4.69 5.47 6.25 7.03 7.81 8.59 9.38 10.16 10.94
OVER $283,151 OVER $283,151 39.60 4.97 5.79 6.62 7.45 8.28 9.11 9.93 10.76 11.59

</TABLE>

FOR NEW YORK CITY RESIDENTS
- --------------------------------------------------------------------------------

COMBINED
EFFECTIVE
TAXABLE INCOME 1999* TAX RATE TAX-FREE YIELD OF
SINGLE RETURN JOINT RETURN % 4% 4.5% 5% 5.5% 6% 6.5% 7% 7.5% 8%
IS EQUIVALENT TO A TAXABLE YIELD OF

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

<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
$ 0- 43,060 23.59 5.24 5.89 6.54 7.20 7.85 8.51 9.16 9.82 10.47
$ 0-25,750- 23.63 5.24 5.89 6.55 7.20 7.86 8.51 9.17 9.82 10.48
$ 25,751- 62,450 $ 43,051-104,050 35.35 6.19 6.96 7.73 8.51 9.28 10.05 10.83 11.60 12.37
$ 62,451-130,250 $104,051-158,550 38.04 6.46 7.26 8.07 8.88 9.68 10.49 11.30 12.11 12.91
$130,251-283,150 $158,551-283,150 42.53 6.96 7.83 8.70 9.57 10.44 11.31 12.18 13.05 13.92
OVER $283,151 OVER $283,151 45.77 7.38 8.30 9.22 10.14 11.06 11.98 12.91 13.83 14.75

</TABLE>

FOR NEW YORK STATE RESIDENTS
- --------------------------------------------------------------------------------

COMBINED
EFFECTIVE
TAXABLE INCOME 1999* TAX RATE TAX-FREE YIELD OF
SINGLE RETURN JOINT RETURN % 4% 4.5% 5% 5.5% 6% 6.5% 7% 7.5% 8%
IS EQUIVALENT TO A TAXABLE YIELD OF

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

To compare the yield of a taxable security with the yield of a tax-free
security, find your taxable income and read across. The table incorporates 1999
federal and applicable State (and City) income tax rates and assumes that all
income would otherwise be taxed at the investor's highest tax rate. Yield
figures are for example only.

*Based upon net amount subject to federal income tax after deductions and
exemptions. This table does not reflect the possible effect of other tax
factors, such as alternative minimum tax, personal exemptions, the phase out of
exemptions, itemized deductions or the possible partial disallowance of
deductions. Consequently, investors are urged to consult their own tax advisers
in this regard.

9
<PAGE>
WHAT YOU CAN EXPECT FROM YOUR INVESTMENT

MONTHLY INCOME

The Fund will pay you regular monthly income. Your monthly income may vary
because of:
o elimination of one or more bonds from the Fund's portfolio because of
calls, redemptions or sales;
o a change in the Fund's expenses; or
o 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):

Estimated Annual Estimated
Interest Income - Annual Expenses
- -------------------------------------------------
Unit Price

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:
o a monthly statement of income payments and any principal payments;
o a notice from the Trustee when new bonds are deposited in exchange or
substitution for bonds originally deposited;
o an annual report on Fund activity; and
o annual tax information. This will also be sent to the IRS. You must report the
amount of tax-exempt interest received during the year.

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

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

10
<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, some bonds may be required to be called pursuant to mandatory
sinking fund provisions.

Also, an issuer might call its bonds during periods of falling interest rates,
if the issuer's bonds have a coupon higher than current market rates.

An issuer might call its bonds in extraordinary cases, including if:
o it no longer needs the money for the original purpose;
o the project is condemned or sold;
o the project is destroyed and insurance proceeds are used to redeem the
bonds;
o any related credit support expires and is not replaced; or
o interest on the bonds become taxable.

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

You can always sell back your units, but we cannot assure you that a liquid
trading market will always exist for the bonds in the portfolio, especially
since current law may restrict the Fund from selling bonds to any Sponsor. The
bonds will generally trade in the over-the-counter market. 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, it is said to
be 'concentrated' in that bond type, which makes the Portfolio less diversified.

Here is what you should know about the Florida and New York Portfolios'
concentrations in hospital and health care bonds.
o payment for these bonds depends on revenues from private third-party payors
and government programs, including Medicare and Medicaid, which have
generally undertaken cost containment measures to limit payments to health
care providers;
o hospitals face increasing competition resulting from hospital mergers and
affiliations;
o hospitals need to reduce costs as HMOs increase market penetration and
hospital supply and drug companies raise prices;
o hospitals and health care providers are subject to various legal claims by
patients and others and are adversely affected by increasing costs of
insurance; and

11
<PAGE>
o many hospitals are aggressively buying physician practices and assuming
risk contracts to gain market share. If revenues do not increase
accordingly, this practice could reduce profits;
o Medicare is changing its reimbursement system for nursing homes. Many
nursing home providers are not sure how they will be treated. In many
cases, the providers may receive lower reimbursements and these would have
to cut expenses to maintain profitability; and
o most retirement/nursing home providers rely on entrance fees for operating
revenues. If people live longer than expected and turnover is lower than
budgeted, operating revenues would be adversely affected by less than
expected entrance fees.

Here is what you should know about the Florida Portfolio's concentration in
municipal water and sewer revenue bonds. The payment of interest and principal
of these bonds depends on the rates the utilities may charge, the demand for
their services and the cost of operating their business which includes the
expense of complying with environmental and other energy and licensing laws and
regulations. The operating results of utilities are particularly influenced by:
o increases in operating and construction costs; and
o unpredicability of future usage requirements.

Changes to the portfolio from bond redemptions, maturities and sales may affect
the Fund's concentrations over time.

STATE CONCENTRATION RISK

FLORIDA RISKS

Generally

Florida's financial condition is affected by numerous national, economic, social
and environmental policies and conditions. For example:

o south Florida is heavily involved with foreign tourism, trade and
investment capital. As a result, the region is susceptible to international
trade and currency imbalances and economic problems in Central and South
America;

o central and northern Florida are more vulnerable to agricultural problems,
such as crop failures or severe weather conditions, especially in the
citrus and sugar industries; and

o the state as a whole is also very dependent on tourism and construction.

State and Local Government

The state of Florida and its local governments are restricted in their ability
to raise taxes and incur debts. These restrictions limit their ability to
generate revenue, and so could hurt their ability to pay debts.

General obligations of the state are rated Aa2 by Moody's, AA+ by Standard &
Poor's and AA by Fitch.

NEW YORK RISKS

Generally

For decades, New York's economy has trailed the rest of the nation. Both the
state and New York City have experienced long-term structural imbalances between
revenues and expenses, and have repeatedly relied substantially on non-recurring
measures to achieve budget balance. The pressures that contribute to budgetary
problems at both the state and local level include:

o the high combined state and local tax burden;

o a decline in manufacturing jobs, leading to above-average unemployment;

12
<PAGE>
o sensitivity to the financial services industry; and

o dependence on federal aid.

State Government

The State government frequently has difficulty approving budgets on time. Budget
gaps of $1 billion and $4 billion are projected for the next two years. The
State's general obligation bonds are rated A by Standard & Poor's and A2 by
Moody's. There is $37 billion of state-related debt outstanding.

New York City Government

Even though the City had budget surpluses each year from 1981, budget gaps of $2
billion are projected for each of the next three years. New York City faces
fiscal pressures from:

o aging public facilities that need repair or replacement;

o welfare and medical costs;

o expiring labor contracts; and

o a high and increasing debt burden.

The City requires substantial state aid, and its fiscal strength depends heavily
on the securities industry. Its general obligation bonds are rated A-by Standard
& Poor's and A3 by Moody's.

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

Some bonds are backed by insurance companies (as shown under Portfolios).
Insurance policies generally make payments only according to a bond's original
payment schedule and do not make early payments when a bond defaults or becomes
taxable. 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:
o limiting real property taxes,
o reducing tax rates,
o imposing a flat or other form of tax, or
o 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:
o adding the value of the bonds, net accrued interest, cash and any other
Fund assets;
o 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
o 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.

13
<PAGE>
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 charge.
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 the secondary market continuously for over 25 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 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:
o if the New York Stock Exchange is closed (other than customary weekend and
holiday closings);
o 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

14
<PAGE>
o 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 Defined Asset 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.

HOW THE FUND WORKS

PRICING

The price of a unit includes interest accrued on the bonds, less expenses, from
the initial 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.

A portion of the price of a unit consists of cash so that the Trustee can
provide you with regular monthly income. When you sell your units you will
receive your share of this cash.

In addition, as with mutual funds, the Fund (and therefore the investors) pay
all or some of the costs of organizing the Fund including:
o cost of initial preparation of legal documents;
o federal and state registration fees;
o initial fees and expenses of the Trustee;
o initial audit; and
o legal expenses and other out-of-pocket expenses.

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:

15
<PAGE>
o to reimburse the Trustee for the Fund's operating expenses;
o for extraordinary services and costs of indemnifying the Trustee and the
Sponsors;
o costs of actions taken to protect the Fund and other legal fees and
expenses;
o expenses for keeping the Fund's registration statement current; and
o 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
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 fees you owe are paid with interest and principal
from certain bonds. If these amounts are not enough, the rest will be paid out
of distributitons 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; if
a contract to buy any 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 will affect the size
and 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:
o diversity of the portfolio;
o size of the Fund relative to its original size;
o ratio of Fund expenses to income;
o current and long-term returns;
o degree to which units may be selling at a premium over par; and
o 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

16
<PAGE>
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.

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:
o to cure ambiguities;
o to correct or supplement any defective or inconsistent provision;
o to make any amendment required by any governmental agency; or
o 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:
o it fails to perform its duties and the Sponsors determine that its
replacement is in your best interest; or
o 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

17
<PAGE>
appoint a replacement. If there is only one Sponsor and it fails to perform its
duties or becomes bankrupt the Trustee may:
o remove it and appoint a replacement Sponsor;
o liquidate the Fund; or
o 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
counsel for the Sponsors, has given an opinion that the units are validly
issued. Special counsel located in the relevant states have given state and
local tax opinions.

AUDITORS

Deloitte & Touche LLP, 2 World Financial Center, New York, New York 10281,
independent accountants, audited the Statements 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
PRUDENTIAL SECURITIES INCORPORATED (an
indirect wholly-owned subsidiary of the
Prudential Insurance Company of America)
One New York Plaza
New York, NY 10292
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 Chase Manhattan Bank, Unit Investment Trust Department, 4 New York
Plaza--6th Floor, New York, New York 10004, 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.

18
<PAGE>
UNDERWRITERS' AND SPONSORS' PROFITS

Underwriters receive sales charges when they sell units. The Sponsors also
realized a profit or loss on the initial date of 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

Merrill Lynch, as agent for the Sponsors, has adopted a code of ethics requiring
preclearance and reporting of personal securities transactions by its employees
with access to information on portfolio transactions. The goal of the code is to
prevent fraud, deception or misconduct against the Fund and to provide
reasonable standards of conduct.

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'). We do not expect that the computer system changes necessary to
prepare for the Year 2000 will cause any major operational difficulties for the
Fund. The Year 2000 Problem may adversely affect the issuers of the bonds
contained in a Portfolio, but 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 or subject to
special rules. You should consult your own tax adviser about your particular
circumstances.

At the date of issue of each bond, counsel for the issuer delivered an opinion
to the effect that interest on the bond is exempt from regular federal income
tax. However, interest may be subject to state and local taxes and may be taken
into account in determining your preference items for alternative minimum tax
purposes. Neither we nor our counsel have reviewed the issuance of the bonds,
related proceedings or the basis for the opinions of counsel for the issuers. We
cannot assure you that the issuer (or other users) have complied or will comply
with any requirements necessary for a bond to be tax-exempt. If any of the bonds
were determined not to be tax-exempt, you could be required to

19
<PAGE>
pay income tax for current and prior years, and if the Fund were to sell the
bond, it might have to sell it at a substantial discount.

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.

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. If
you are an individual and sell your units after holding them for more than one
year, you may be entitled to a 20% maximum federal tax rate on any resulting
gains. Consult your tax adviser in this regard. Because the deductibility of
capital losses is subject to limitations, you may not be able to deduct all of
your capital losses.

YOUR BASIS IN THE BONDS

Your aggregate basis in the bonds 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 premium' and
'bond premium'. You should consult your tax adviser in this regard.

EXPENSES

If you are not a corporate investor, you will not be entitled to a deduction for
your share of fees and expenses of the Fund. Also, if you borrowed money in
order to purchase or carry your units, you will not be able to deduct the
interest on this borrowing for federal income tax purposes. The IRS may treat
your purchase of units as made with borrowed money even if the money is not
directly traceable to the purchase of units.

STATE AND LOCAL TAXES

Under the income tax laws of the State and City of New York, the Fund will not
be taxed as a corporation. If you are a New York taxpayer, your income from the
Fund will not be tax-exempt in New York except to the extent that the income is
earned on bonds that are tax-exempt for New York purposes. Depending on where
you live, your income from the Fund may be subject to state and local taxation.
You should consult your tax adviser in this regard.

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<PAGE>
FLORIDA TAXES

In the opinion of Greenberg, Traurig, P.A., Miami, Florida, special counsel on
Florida tax matters:

Under the income tax laws of the State of Florida, the Fund will not be taxed as
a corporation. Florida imposes an income tax on corporations but does not impose
a personal income tax. Accordingly, if you are an individual taxpayer your
income from the Fund will not be subject to tax in Florida. However, if you are
an entity that is normally taxed as a corporation, your income from the fund
will not be exempt from tax in Florida and special rules for taxation apply
depending on the type of entity. You should consult your tax adviser in this
regard.

Florida also imposes a tax on intangible personal property, such as stocks,
bonds, notes and units in trusts. The tax is imposed on Florida taxpayers as of
January 1st of each year. Florida exempts certain types of bonds and debt
obligations from this tax. Your units will be exempt from the intangible
personal property tax as long as the Fund invests exclusively in bonds and other
debt obligations that are tax-exempt for Florida purposes.

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 portfolios, 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.

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<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA INSURED AND
NEW YORK TRUSTS),
DEFINED ASSET FUNDS

REPORT OF INDEPENDENT ACCOUNTANTS

The Sponsors, Trustee and Holders
of Municipal Investment Trust Fund,
Multistate Series - 315 (Florida Insured and
New York Trusts),
Defined Asset Funds:

We have audited the accompanying statements of condition of
Municipal Investment Trust Fund, Multistate Series - 315
(Florida Insured and New York Trusts), Defined Asset Funds,
including the portfolios, as of July 31, 1999 and the
related statements of operations and of changes in net
assets for the year ended July 31, 1999 and the period
August 11, 1997 to July 31, 1998. These financial statements
are the responsibility of the Trustee. Our responsibility
is to express an opinion on these financial statements based
on our audits.

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 July 31,
1999, as shown in such portfolios, were confirmed to us by
The Chase Manhattan Bank, 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
audits provide 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,
Multistate Series - 315 (Florida Insured and New York Trusts),
Defined Asset Funds, at July 31, 1999 and the results of
their operations and changes in their net assets for the
above-stated periods in conformity with generally accepted
accounting principles.

DELOITTE & TOUCHE LLP

New York, N.Y.
October 22, 1999

D - 1.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA INSURED TRUST),
DEFINED ASSET FUNDS

STATEMENT OF CONDITION
As of July 31, 1999

<TABLE>
<S> <C> <C>
TRUST PROPERTY:
Investment in marketable securities -
{ 20} at value (cost $ 3,615,614 )(Note 1)......... $ 3,581,306
{ 36} Accrued interest ............................... 44,835
Accrued interest on Segregated Bonds (Note 5) .. 1,540
Income payments receivable ..................... 3,815
{ 34} Cash - principal ............................... 36,297
Cash - income on Segregated Bonds .............. 5,948
Deferred organization costs (Note 6)............ 2,437
-----------
{ 40} Total trust property ......................... 3,676,178

LESS LIABILITIES:
{ 50} Income advance from Trustee..................... $ 37,046
Principal payments payable ..................... 3,815
{143} Accrued Sponsors' fees ......................... 1,008
Other liabilities (Note 6) ..................... 2,437 44,306
----------- -----------

NET ASSETS, REPRESENTED BY:
{ 80} 3,644 units of fractional undivided
{ 80} interest outstanding (Note 3)................ 3,621,276

{105} Undistributed net investment income ............ 10,596 $ 3,631,872
----------- ===========

{130}UNIT VALUE ($ 3,631,872 / 3,644 units )........... $ 996.67
===========

</TABLE>

See Notes to Financial Statements.
D - 2.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA INSURED TRUST),
DEFINED ASSET FUNDS

STATEMENTS OF OPERATIONS
<TABLE>
<CAPTION>
August 11, 1997
Year Ended to
July 31, July 31,
1999 1998
---- ----

<S> <C> <C>
INVESTMENT INCOME:
{ 10} Interest income ........................ $ 188,764 $ 205,302
Interest income on Segregated
Bonds (Note 5) ....................... 7,380 8,348
{ 20} Trustee's fees and expenses ............ (5,201) (7,646)
{ 30} Sponsors' fees ......................... (1,769) (1,822)
------------------------------
{ 40} Net investment income .................. 189,174 204,182
------------------------------

REALIZED AND UNREALIZED GAIN (LOSS)
ON INVESTMENTS:
Realized gain on
{ 50} securities sold or redeemed .......... 491 4,873
Unrealized appreciation (depreciation)
{ 60} of investments ....................... (135,007) 100,699
------------------------------
Net realized and unrealized
{ 70} gain (loss) on investments .......... (134,516) 105,572
------------------------------

NET INCREASE IN NET ASSETS
{ 80} RESULTING FROM OPERATIONS .............. $ 54,658 $ 309,754
==============================

</TABLE>

See Notes to Financial Statements.
D - 3.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA INSURED TRUST),
DEFINED ASSET FUNDS

STATEMENTS OF CHANGES IN NET ASSETS
<TABLE>
<CAPTION>
August 11, 1997
Year Ended to
July 31, July 31,
1999 1998
---- ----

<S> <C> <C>
OPERATIONS:
{ 10} Net investment income .................. $ 189,174 $ 204,182
Realized gain on
{ 20} securities sold or redeemed .......... 491 4,873
Unrealized appreciation (depreciation)
{ 30} of investments ....................... (135,007) 100,699
------------------------------
Net increase in net assets
{ 40} resulting from operations ............ 54,658 309,754
------------------------------

INCOME DISTRIBUTIONS TO
HOLDERS (Note 2): .................... (181,697) (185,091)
------------------------------

SHARE TRANSACTIONS:
Deferred sales charge (Note 5):
Income ............................... (8,240) (1,790)
Principal ............................ (47,264) (56,001)

{ 82} Redemption amounts:
Income ............................... (42) (202)
{ 83} Principal ............................ (25,916) (370,637)
------------------------------
{ 84} Net share transactions ................. (81,462) (428,630)
------------------------------

{ 90}NET DECREASE IN NET ASSETS ............... (208,501) (303,967)

{100}NET ASSETS AT BEGINNING OF PERIOD ........ 3,840,373 4,144,340
------------------------------
{110}NET ASSETS AT END OF PERIOD .............. $ 3,631,872 $ 3,840,373
==============================
PER UNIT:
Income distributions during
{120} period ............................... $ 49.72 $ 45.86
==============================
Net asset value at end of
{140} period ............................... $ 996.67 $ 1,046.71
==============================
TRUST UNITS:
{ 83} Redeemed during period ................. 25 367
{150} Outstanding at end of period ........... 3,644 3,669
==============================
</TABLE>

See Notes to Financial Statements.

D - 4.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA INSURED TRUST),
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 August 11, 1997 was based upon
offering side evaluations at August 7, 1997, the day prior
to the Date of Deposit. Cost of securities at August 11, 1997
was also based on such offering side evaluations.

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

2. DISTRIBUTIONS

A distribution of net investment income is made to Holders each month.
Receipts other than interest, after deductions for redemptions and applicable
expenses, are distributed periodically.

3. NET CAPITAL
<TABLE>
<S> <C>
{ 8} {Original Units and Unit Cost at Date of Deposit ........... 4,036 4,144,340 }
{ 10} Cost of 3,644 units at Date of Deposit ..................... $ 3,741,817
Transfer of capital to interest on Segregated Bonds (Note 5) 15,728
{ 31} Redemptions of units - net cost of 392 units redeemed
{143} less redemption amounts (principal)....................... 5,970
Deferred sales charge (Note 5) ............................. (113,295)
{ 40} Realized gain on securities sold or redeemed ............... 5,364
{ 70} Net unrealized depreciation of investments.................. (34,308)
-----------

{ 80} Net capital applicable to Holders .......................... $ 3,621,276
===========
</TABLE>
4. INCOME TAXES

As of July 31, 1999, net unrealized depreciation of investments, based on cost
for Federal income tax purposes, aggregated $34,308, of which $56,137 related
to depreciated securities and $21,829 related to appreciated securities. The
cost of investment securities for Federal income tax purposes was $3,615,614
at July 31, 1999.

D - 5.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA INSURED TRUST),
DEFINED ASSET FUNDS

NOTES TO FINANCIAL STATEMENTS

5. DEFERRED SALES CHARGE

$70,000 face amount of Dade Cnty., FL, Wtr. and Swr. Sys. Rev. Bonds, Ser. 1997,
have been segregated to fund the deferred sales charges. The sales charges are
being paid for with the interest received and by periodic sales or maturity of
these bonds. A deferred sales charge of $3.75 per Unit is charged on a quarterly
basis, and paid to the Sponsors periodically by the Trustee on behalf of the
Holders, up to an aggregate of $45 per Unit over the first three years of the
life of the Fund. Should a Holder redeem Units prior to the third anniversary
of the Fund, the remaining balance of the deferred sales charge will be charged.

6. DEFERRED ORGANIZATION COSTS

Deferred organization costs are being amortized over five years. Included in
"Other liabilities" on the Statement of Condition is $2,437 payable to the
Trustee for reimbursement of costs related to the organization of the Trust.

D - 6.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA TRUST) (INSURED),
DEFINED ASSET FUNDS

PORTFOLIO
As of July 31, 1999

<TABLE>
<CAPTION>
Rating of {PE VER C.} Optional
Portfolio No. and Title of Issues Face Redemption
Securities (1) (4) Amount Coupon Maturities(3) Provisions(3) Cost(2) Value(2)
---------- --------- ----------- ----------- ------------ ------------ ---------- ---------
<S> <C> <C> <C> <C> <C> <C> <C>
1 Florida Hsg. Fin. Agy., Homeowner Mtge. AAA $ 130,000 5.625 % 2017 07/01/07 $ 130,832 $ 131,322
Rev. Bonds, Ser. 1997-1 (MBIA Ins.) {340736R25 } @ 102.000

2 Broward Cnty., FL, Indian Trace Cmnty. Aaa(m) 500,000 5.000 2027 05/01/07 477,630 465,260
Dev. Dist., Wtr. Management Spec. {454501CS4 } @ 101.000
Benefit Assessment Bonds, Ser. 1997
(MBIA Ins.)

3 Dade Cnty., FL, Professional Sports AAA 485,000 5.250 2030 None 477,473 475,843
Fran. Facs. Tax Rev. Bonds, Ser. 1995 {233542CE7 }
(MBIA Ins.)

4 Dade Cnty., FL, G.O. of Dade Cnty., AAA 70,000 6.600 2000 None 75,117 72,325
Pub. Imp. Bonds, Ser. CC (AMBAC Ins.) {2334334F5 }
(6)

5 Dade Cnty., FL, Wtr. and Swr. Sys. Rev. AAA 490,000 5.250 2021 10/01/07 486,648 478,054
Bonds, Ser. 1997 (Financial Guaranty {233620EV1 } @ 101.000
Ins.)

6 City of Jacksonville, FL, Dist. Wtr. AAA 350,000 5.000 2020(7) 10/01/08 336,067 357,406
and Swr. Rev. Bonds, Ser. 1996 (MBIA {469362BF3 } @ 100.000
Ins.)

7 Martin Cnty., FL, Hlth. Facs. Auth., AAA 500,000 5.375 2024 11/15/07 498,180 487,475
Hosp. Rev. Bonds (Martin Mem. Med. Ctr. {573903CP4 } @ 102.000
Proj.), Ser. 1997 A (MBIA Ins.)

8 South Broward Hosp. Dist., FL, Hosp. AAA 500,000 5.250 2021 05/01/06 493,280 481,145
Rfdg. Rev. Bonds, Ser. 1996 (MBIA Ins.) {836753FC2 } @ 102.000

9 Tampa Sports Auth., FL, Local Option AAA 650,000 5.250 2027 01/01/07 640,387 632,476
Sales Tax Rev. Bonds (Stadium Proj.), {875263KF1 } @ 101.000
Ser. 1997 (MBIA Ins.)

--------- --------- ---------
TOTAL $ 3,675,000 $ 3,615,614 $ 3,581,306
========= ========= =========

</TABLE>

See Notes to Portfolios on Page D - 14.

D - 7.

<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (NEW YORK TRUST),
DEFINED ASSET FUNDS

STATEMENT OF CONDITION
As of July 31, 1999

<TABLE>
<S> <C> <C>
TRUST PROPERTY:
Investment in marketable securities -
{ 20} at value (cost $ 5,167,719 )(Note 1)......... $ 5,097,833
{ 36} Accrued interest ............................... 67,995
Accrued interest on Segregated Bonds (Note 5) .. 2,333
Income payments receivable ..................... 1,828
{ 34} Cash - principal ............................... 52,717
Cash - income on Segregated Bonds .............. 14,206
Deferred organization costs (Note 6) ........... 3,657
-----------
{ 40} Total trust property ......................... 5,240,569

LESS LIABILITIES:
{ 50} Income advance from Trustee..................... $ 52,663
Principal payments payable (Segregated Bond) ... 1,031
Principal payments payable ..................... 1,828
{143} Accrued Sponsors' fees ......................... 1,469
Other liabilities (Note 6) ..................... 3,657 60,648
----------- -----------

NET ASSETS, REPRESENTED BY:
{ 80} 5,224 units of fractional undivided
{ 80} interest outstanding (Note 3)................ 5,164,230

{105} Undistributed net investment income ............ 15,691 $ 5,179,921
----------- ===========

{130}UNIT VALUE ($ 5,179,921 / 5,224 units )........... $ 991.56
===========

</TABLE>

See Notes to Financial Statements.
D - 8.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (NEW YORK TRUST),
DEFINED ASSET FUNDS

STATEMENTS OF OPERATIONS
<TABLE>
<CAPTION>
August 11, 1997
Year Ended to
July 31, July 31,
1999 1998
---- ----

<S> <C> <C>
INVESTMENT INCOME:
{ 10} Interest income ........................ $ 289,322 $ 307,018
Interest income on Segregated
Bonds (Note 5) ....................... 8,411 11,888
{ 20} Trustee's fees and expenses ............ (7,274) (8,887)
{ 30} Sponsors' fees ......................... (2,611) (2,727)
------------------------------
{ 40} Net investment income .................. 287,848 307,292
------------------------------

REALIZED AND UNREALIZED GAIN (LOSS)
ON INVESTMENTS:
Realized gain on
{ 50} securities sold or redeemed .......... 6,279 1,839
Unrealized appreciation (depreciation)
{ 60} of investments ....................... (197,944) 128,058
------------------------------
Net realized and unrealized
{ 70} gain (loss) on investments .......... (191,665) 129,897
------------------------------

NET INCREASE IN NET ASSETS
{ 80} RESULTING FROM OPERATIONS .............. $ 96,183 $ 437,189
==============================

</TABLE>

See Notes to Financial Statements.
D - 9.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (NEW YORK TRUST),
DEFINED ASSET FUNDS

STATEMENTS OF CHANGES IN NET ASSETS
<TABLE>
<CAPTION>
August 11, 1997
Year Ended to
July 31, July 31,
1999 1998
---- ----

<S> <C> <C>
OPERATIONS:
{ 10} Net investment income .................. $ 287,848 $ 307,292
Realized gain on
{ 20} securities sold or redeemed .......... 6,279 1,839
Unrealized appreciation (depreciation)
{ 30} of investments ....................... (197,944) 128,058
------------------------------
Net increase in net assets
{ 40} resulting from operations ............ 96,183 437,189
------------------------------

INCOME DISTRIBUTIONS TO
HOLDERS (Note 2): .................... (279,813) (277,465)
------------------------------

SHARE TRANSACTIONS:
Deferred sales charge (Note 5):
Income ............................... (3,760) (2,637)
Principal ............................ (86,581) (81,547)

{ 82} Redemption amounts:
Income ............................... (763) (1,110)
{ 83} Principal ............................ (358,109) (478,582)
------------------------------
{ 84} Net share transactions ................. (449,213) (563,876)
------------------------------

{ 90}NET DECREASE IN NET ASSETS ............... (632,843) (404,152)

{100}NET ASSETS AT BEGINNING OF PERIOD ........ 5,812,764 6,216,916
------------------------------
{110}NET ASSETS AT END OF PERIOD .............. $ 5,179,921 $ 5,812,764
==============================
PER UNIT:
Income distributions during
{120} period ............................... $ 51.69 $ 47.53
==============================
Net asset value at end of
{140} period ............................... $ 991.56 $ 1,041.90
==============================
TRUST UNITS:
{ 83} Redeemed during period ................. 355 476
{150} Outstanding at end of period ........... 5,224 5,579
==============================
</TABLE>

See Notes to Financial Statements.

D - 10.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (NEW YORK TRUST),
DEFINED ASSET FUNDS

NOTES TO FINANCIAL STATEMENTS

1. SIGNIFICANT ACCOUNTING POLICIES

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

2. DISTRIBUTIONS

A distribution of net investment income is made to Holders each month.
Receipts other than interest, after deductions for redemptions and applicable
expenses, are distributed periodically.

3. NET CAPITAL
<TABLE>
<S> <C>
{ 8} {Original Units and Unit Cost at Date of Deposit ........... 6,055 6,216,916 }
{ 10} Cost of 5,224 units at Date of Deposit ..................... $ 5,363,694
Transfer of capital to interest on Segregated Bonds (Note 5) 20,299
{ 31} Redemptions of units - net cost of 831 units redeemed
{143} less redemption amounts (principal)....................... 16,530
Deferred sales charge (Note 5) ............................. (174,525)
{ 40} Realized gain on securities sold or redeemed ............... 8,118
{ 70} Unrealized depreciation of investments...................... (69,886)
-----------

{ 80} Net capital applicable to Holders .......................... $ 5,164,230
===========
</TABLE>
4. INCOME TAXES

As of July 31, 1999, unrealized depreciation of investments, based on cost
for Federal income tax purposes, aggregated $69,886, all of which related
to depreciated securities. The cost of investment securities for Federal income
tax purposes was $5,167,719 at July 31, 1999.

D - 11.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (NEW YORK TRUST),
DEFINED ASSET FUNDS

NOTES TO FINANCIAL STATEMENTS

5. DEFERRED SALES CHARGE

$110,000 face amount of the Town of Brookhaven, Suffolk Cnty., NY, Pub. Imp.
Serial Bonds 1997, have been segregated to fund the deferred sales charges. The
sales charges are being paid for with the interest received and by periodic
sales or maturity of these bonds. A deferred sales charge of $3.75 per Unit is
charged on a quarterly basis, and paid to the Sponsors periodically by the
Trustee on behalf of the Holders, up to an aggregate of $45 per Unit over the
first three years of the life of the Fund. Should a Holder redeem Units prior
to the third anniversary of the Fund, the remaining balance of the deferred
sales charge will be charged.

6. DEFERRED ORGANIZATION COSTS

Deferred organization costs are being amortized over five years. Included in
"Other liabilities" on the Statement of Condition is $3,657 payable to the
Trustee for reimbursement of costs related to the organization of the Trust.

D - 12.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (NEW YORK TRUST),
DEFINED ASSET FUNDS

PORTFOLIO
As of July 31, 1999

Rating {PE VER C.} Optional
Portfolio No. and Title of of Face Redemption
Securities Issues(1) Amount Coupon Maturities(3) Provisions(3) Cost(2) Value(2)
---------- --------- ----------- ----------- ------------ ------------ ---------- ---------
<S> <C> <C> <C> <C> <C> <C> <C>
1 Dormitory Auth. of the State of New BBB+ $ 1,000,000 5.500 % 2025 07/01/06 $ 992,880 $ 977,000
York, Dept. of Hlth., Rev. Bonds, Ser. {649835W92 } @ 102.000
1996

2 Dormitory Auth. of the State of New A- 795,000 5.625 2021 02/15/07 803,379 791,534
York, Mental Hlth. Svcs. Facs. Imp. {649836T60 } @ 102.000
Rev. Bonds, Ser. 1997 B

3 Dormitory Auth. of the State of New A- 850,000 5.500 2026 05/15/06 843,846 830,136
York, State Univ. Educl. Facs., Rev. {649836MR1 } @ 102.000
Bonds, Ser. 1996

4 New York State Energy Research and Dev. AAA 50,000 5.500 2021 01/01/06 50,391 49,873
Auth. (Brooklyn Union Gas Co. Proj.), {649842BL4 } @ 102.000
Gas Facs. Rev. Bonds, Ser. 1996 (MBIA
Ins.) (5)

5 New York State Urban Dev. Corp., Corr. BBB+ 795,000 5.375 2025 01/01/06 770,037 761,523
Cap. Fac. Rev. Bonds, Ser. 6 {6500336S7 } @ 102.000

6 The City of New York, NY, G.O. Bonds, A- 900,000 5.375 2022 08/01/07 872,919 868,356
Ser. 1997 B {649667KT8 } @ 101.000

7 New York City, NY, Mun. Wtr. Fin. A1(m) 755,000 5.125 2021 06/15/07 722,407 708,235
Auth., Wtr. and Swr. Sys. Rev. Bonds, {6497067Q5 } @ 101.000
Fiscal Ser. 1998 A

8 Town of Brookhaven, Suffolk Cnty., NY, Aaa(m) 110,000 4.600 2000 None 111,860 111,176
Pub. Imp. Serial Bonds 1997 (MBIA Ins.) {1131515Y6 }
(5) (6)

--------- --------- ---------
TOTAL $ 5,255,000 $ 5,167,719 5,097,833
========= ========= =========
</TABLE>

See Notes to Portfolios on Page D - 14.

D - 13.
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES - 315 (FLORIDA INSURED AND
NEW YORK TRUSTS), DEFINED ASSET FUNDS

NOTES TO PORTFOLIOS
As of July 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 a "AAA" rating to the securities. Securities covered by
portfolio insurance are rated "AAA" only as long as they remain in the Trust.

(5) Insued by the indicated municipal bond insurance company.

(6) These bonds have been segregated to fund the deferred sales charges.

(7) Bonds with an aggregate face amount of $ 350,000 of the Florida Insured
Trust have been pre-refunded and are expected to be called for redemption on the
optional redemption provision date shown.

D - 14.

Defined
Asset FundsSM

HAVE QUESTIONS ? MUNICIPAL INVESTMENT TRUST FUND
Request the most MULTISTATE SERIES--315
recent free Information (A Unit Investment Trust)
Supplement that gives more ---------------------------------------
details about the Fund, This Prospectus does not contain
by calling: complete information about the
The Chase Manhattan Bank investment company filed with the
1-800-323-1508 Securities and Exchange Commission in
Washington, D.C. under the:
o Securities Act of 1933 (file no.
333-29283) and
o Investment Company Act of 1940 (file
no. 811-1777).
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.

11313--11/99
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND
MULTISTATE SERIES
DEFINED ASSET FUNDS
CONTENTS OF REGISTRATION STATEMENT

This Post-Effective Amendment to the Registration Statement on Form S-6
comprises the following papers and documents:

The facing sheet of Form S-6.

The cross-reference sheet (incorporated by reference to the Cross-Reference
Sheet to the Registration Statement of Defined Asset Funds Municipal Insured
Series, 1933 Act File No. 33-54565).

The Prospectus.

The Signatures.

The following exhibits:

1.1.1--Form of Standard Terms and Conditions of Trust Effective as of
October 21, 1993 (incorporated by reference to Exhibit 1.1.1 to the
Registration Statement of Municipal Investment Trust Fund,
Multistate Series--48, 1933 Act File No. 33-50247).

4.1 --Consent of the Evaluator.

5.1 --Consent of independent accountants.

9.1 --Information Supplement (incorporated by reference to Post-Effective
Amendment No. 4 to Exhibit 9.1 to the Registration Statement of
Municipal Investment Trust Fund, Multistate Series--409, 1933 Act
File No. 333-81777).

R-1
<PAGE>
MUNICIPAL INVESTMENT TRUST FUND
MULTISTATE SERIES--315
DEFINED ASSET FUNDS

SIGNATURES

PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT,
MUNICIPAL INVESTMENT TRUST FUND, MULTISTATE SERIES--315, DEFINED ASSET FUNDS,
CERTIFIES THAT IT MEETS ALL OF THE REQUIREMENTS FOR EFFECTIVENESS OF THIS
REGISTRATION STATEMENT PURSUANT TO RULE 485(B) UNDER THE SECURITIES ACT OF 1933
AND HAS DULY CAUSED THIS REGISTRATION STATEMENT OR 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 10TH DAY OF
NOVEMBER, 1999.

SIGNATURES APPEAR ON PAGES R-3, R-4, R-5, R-6 AND R-7.

A majority of the members of the Board of Directors of Merrill Lynch,
Pierce, Fenner & Smith Incorporated has signed this Registration Statement or
Amendment to the Registration Statement pursuant to Powers of Attorney
authorizing the person signing this Registration Statement or Amendment to the
Registration Statement to do so on behalf of such members.

A majority of the members of the Board of Directors of Salomon Smith Barney
Inc. has signed this Registration Statement or Amendment to the Registration
Statement pursuant to Powers of Attorney authorizing the person signing this
Registration Statement or Amendment to the Registration Statement to do so on
behalf of such members.

A majority of the members of the Board of Directors of Prudential
Securities Incorporated has signed this Registration Statement or Amendment to
the Registration Statement pursuant to Powers of Attorney authorizing the person
signing this Registration Statement or Amendment to the Registration Statement
to do so on behalf of such members.

A majority of the members of the Executive Committee of the Board of
Directors of PaineWebber Incorporated has signed this Registration Statement or
Amendment to the Registration Statement pursuant to Powers of Attorney
authorizing the person signing this Registration Statement or Amendment to the
Registration Statement to do so on behalf of such members.

A majority of the members of the Board of Directors of Dean Witter Reynolds
Inc. has signed this Registration Statement or Amendment to the Registration
Statement pursuant to Powers of Attorney authorizing the person signing this
Registration Statement or Amendment to the Registration Statement to do so on
behalf of such members.

R-2
<PAGE>
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
DEPOSITOR

By the following persons, who constitute Powers of Attorney have been filed
a majority of under
the Board of Directors of Merrill Form SE and the following 1933 Act
Lynch, Pierce, File
Fenner & Smith Incorporated: Number: 333-70593

GEORGE A. SCHIEREN
JOHN L. STEFFENS
By J. DAVID MEGLEN
(As authorized signatory for Merrill Lynch, Pierce,
Fenner & Smith Incorporated and
Attorney-in-fact for the persons listed above)

R-3
<PAGE>
SALOMON SMITH BARNEY INC.
DEPOSITOR

By the following persons, who constitute a majority of Powers of Attorney
the Board of Directors of Salomon Smith Barney Inc.: have been filed
under the 1933 Act
File Numbers:
333-63417 and
333-63033

MICHAEL A. CARPENTER
DERYCK C. MAUGHAN

By GINA LEMON
(As authorized signatory for
Salomon Smith Barney Inc. and
Attorney-in-fact for the persons listed above)

R-4
<PAGE>
PRUDENTIAL SECURITIES INCORPORATED
DEPOSITOR

By the following persons, who constitute a majority of Powers of Attorney
the Board of Directors of Prudential Securities have been filed
Incorporated: under Form SE and
the following 1933
Act File Numbers:
33-41631 and
333-15919

ROBERT C. GOLDEN
ALAN D. HOGAN
A. LAURENCE NORTON, JR.
LELAND B. PATON
VINCENT T. PICA II
MARTIN PFINSGRAFF
HARDWICK SIMMONS
LEE B. SPENCER, JR.
BRIAN M. STORMS

By RICHARD R. HOFFMANN
(As authorized signatory for Prudential Securities
Incorporated and Attorney-in-fact for the persons
listed above)

R-5
<PAGE>
PAINEWEBBER INCORPORATED
DEPOSITOR

By the following persons, who constitute Powers of Attorney have been filed
the Board of Directors of PaineWebber under
Incorporated: the following 1933 Act File
Number: 33-55073

MARGO N. ALEXANDER
TERRY L. ATKINSON
BRIAN M. BAREFOOT
STEVEN P. BAUM
MICHAEL CULP
REGINA A. DOLAN
JOSEPH J. GRANO, JR.
EDWARD M. KERSCHNER
JAMES P. MacGILVRAY
DONALD B. MARRON
ROBERT H. SILVER
MARK B. SUTTON
By
ROBERT E. HOLLEY
(As authorized signatory for
PaineWebber Incorporated
and Attorney-in-fact for the persons listed above)

R-6
<PAGE>
DEAN WITTER REYNOLDS INC.
DEPOSITOR

By the following persons, who constitute Powers of Attorney have been filed
a majority of under Form SE and the following 1933
the Board of Directors of Dean Witter Act File Numbers: 33-17085,
Reynolds Inc.: 333-13039 and 333-47553

RICHARD M. DeMARTINI
RAYMOND J. DROP
JAMES F. HIGGINS
MITCHELL M. MERIN
STEPHEN R. MILLER
PHILIP J. PURCELL
THOMAS C. SCHNEIDER
By
MICHAEL D. BROWNE
(As authorized signatory for
Dean Witter Reynolds Inc.
and Attorney-in-fact for the persons listed above)

R-7

<PAGE>
EXHIBIT 4.1

STANDARD & POOR'S
A DIVISION OF THE McGRAW-HILL COMPANIES
J. J. KENNY
65 BROADWAY
NEW YORK, N.Y. 10006-2551
TELEPHONE (212) 770-4422
FAX 212/797-8681

November 10, 1999

Frank A. Ciccotto, Jr.
Vice President
Tax-Exempt Evaluations

Merrill Lynch, Pierce, Fenner & Smith
Incorporated
Defined Asset Funds
P.O. Box 9051
Princeton, New Jersey 08543-9051
The Chase Manhattan Bank
4 New York Plaza, 6th Floor
New York, New York 10004

RE: MUNICIPAL INVESTMENT TRUST FUND,
MULTISTATE SERIES--315, DEFINED ASSET FUNDS

Gentlemen:

We have examined the post-effective Amendment to the Registration Statement
File No. 333-29283 for the above-captioned trust. We hereby acknowledge that
Kenny S&P Evaluation Services, a division of J. J. Kenny Co., Inc. is currently
acting as the evaluator for the trust. We hereby consent to the use in the
Amendment of the reference to Kenny S&P Evaluation Services, a division of J. J.
Kenny Co., Inc. as evaluator.

In addition, we hereby confirm that the ratings indicated in the
above-referenced Amendment to the Registration Statement for the respective
bonds comprising the trust portfolio are the ratings currently indicated in our
KENNYBASE database.

You are hereby authorized to file copies of this letter with the Securities
and Exchange Commission.

Sincerely,
FRANK A. CICCOTTO
Vice President

<PAGE>
Exhibit 5.1
CONSENT OF INDEPENDENT ACCOUNTANTS
The Sponsors and Trustee of
Municipal Investment Trust Fund--Multistate Series--315 (New York and Florida
Trusts), Defined Asset Funds

We consent to the use in this Post-Effective Amendment No. 2 to Registration
Statement No. 333-29283 of our opinion dated October 22, 1999 appearing in the
Prospectus, which is part of such Registration Statement, and to the reference
to us under the heading 'Miscellaneous--Auditors' in such Prospectus.

DELOITTE & TOUCHE LLP
New York, N.Y.
November 10, 1999