INSURED MUNICIPALS INCOME TRUST 155TH INSURED MULTI SERIES
487, 1994-02-24
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                                                     File No. 33-51479
                                                           CIK #896892

                   Securities and Exchange Commission
                      Washington, D.C.  20549-1004

                             Amendment No. 1
                                   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:        Insured Municipals Income Trust
                               155th Insured Multi-Series
                               
B. Name of Depositor:          Van Kampen Merritt Inc.
                               
C. Complete address of Depositor's principal executive offices:

                               One Parkview Plaza
                               Oakbrook Terrace, Illinois  60181
                               
D. Name and complete address of agents for service:

   Chapman and Cutler          Van Kampen Merritt Inc.
   Attention:  Mark J. Kneedy  Attention:  John C. Merritt,
   111 W. Monroe Street        Chairman
   Chicago, Illinois  60603    One Parkview Plaza
                               Oakbrook Terrace, Illinois  60181
                               
E. Title and amount of securities being registered:  33,053* Units

F. Proposed maximum offering price to the public of the securities being
registered: ($1020 per Unit**):  $33,714,060

G. Amount of filing fee, computed at one twenty-nineth of 1 percent of
   proposed maximum aggregate offering price to the public:  $11,625.52
   ($351.72 previously paid)
   
H. Approximate date of proposed sale to the public:


         As Soon As Practicable After The Effective Date Of The
                         Registration Statement
____
/X/: Check box if it is proposed that this filing will become effective
     on February 24, 1994 at 2:00 P.M.
     pursuant to Rule 487.


*  22,035 Units registered for primary distribution.
   11,018 Units registered for resale by Depositor of Units
            previously sold in primary distribution.
**        Estimated solely for the purpose of calculating the
            registration fee.


    Form N-8B-2                              Form S-6
     Item Number                        Heading in Prospectus
                                   --
                    Insured Municipals Income Trust,

                       155th Insured Multi-Series
                                    
                          Cross Reference Sheet

                 Pursuant to Rule 404(c) of Regulation C
                    under the Securities Act of 1933
                                    
               (Form N-8B-2 Items Required by Instruction
                     1 as to Prospectus on Form S-6)

         Form N-8B-2                               Form S-6
         Item Number                         Heading in Prospectus

                   I.  Organization and General Information

1.   (a)  Name of trust)                )
     (b)  Title of securities issued    ) Prospectus Front Cover Page

2.   Name and address of Depositor      ) Introduction
                                        ) Summary of Essential Financial
                                        )   Information
                                        ) Trust Administration

3.   Name and address of Trustee        ) Introduction
                                        ) Summary of Essential Financial
                                        )   Information
                                        ) Trust Administration

4.   Name and address of principal      ) Underwriting
       underwriter                      )

5.   Organization of trust              ) Introduction

6.   Execution and termination of       ) Introduction
       Trust Indenture and Agreement    ) Trust Administration

7.   Changes of Name                    ) *

8.   Fiscal year                        ) *

9.   Material Litigation                ) *


    II.  General Description of the Trust and Securities of the Trust

10.  General information regarding      ) Introduction
       trust's securities and rights    ) Unitholder Explanations
       of security holders              ) Trust Information
                                        ) Trust Administration

11.  Type of securities comprising      ) Introduction
       units                            ) Trust Information
                                        ) Trust Portfolios

12.  Certain information regarding      ) *
       periodic payment certificates    )

13.  (a)  Load, fees, charges and       )    Introduction
            expenses                    ) Summary of Essential Financial
                                        )   Information
                                        ) Unitholder Explanations
                                          Trust Information
                                          Trust Administration

     (b)  Certain information regarding )
           periodic payment plan        ) *
           certificates                 )

     (c)  Certain percentages           ) Introduction
                                        ) Summary of Essential Financial
                                        )   Information
                                        ) Unitholder Explanations

     (d)  Certain other fees, expenses or) Unitholder Explanations
            charges payable by holders  ) Trust Administration

     (e)  Certain profits to be received  )  Unitholder Explanations
           by depositor, principal      ) Underwriting
           underwriter, trustee or      ) Notes to Portfolios
           affiliated persons           )

     (f)  Ratio of annual charges to    ) *
           income                       )

14.  Issuance of trust's securities     ) Unitholder Explanations

15.  Receipt and handling of payments   ) *
       from purchasers                  )

16.  Acquisition and disposition of     ) Introduction
       underlying securities            ) Unitholder Explanations
                                        )  Trust Administration
17.  Withdrawal or redemption           ) Unitholder Explanations
                                        )  Trust Administration
18.  (a)  Receipt and disposition       ) Introduction
           of income                    ) Unitholder Explanations

     (b)  Reinvestment of distributions ) *

     (c)  Reserves or special funds     ) Unitholder Explanations
                                        ) Trust Administration
     (d)  Schedule of distributions     ) *

19.  Records, accounts and reports      ) Unitholder Explanations
       Trust Administration             )

20.  Certain miscellaneous provisions   ) Trust Administration
       of Trust Agreement               )

21.  Loans to security holders          ) *

22.  Limitations on liability           ) Trust Portfolios
                                        ) Trust Administration

23.  Bonding arrangements               ) *

24.  Other material provisions of       ) *
       trust indenture or agreement     )


    III.  Organization, Personnel and Affiliated Persons of Depositor

25.  Organization of Depositor          ) Trust Administration

26.  Fees received by Depositor         ) Trust Administration

27.  Business of Depositor              ) Trust Administration
28.  Certain information as to          )
       officials and affiliated         ) *
       persons of Depositor             )

29.  Companies owning securities of     ) *
       Depositor                        )

30.  Controlling persons of Depositor   ) *

31.  Compensation of Directors          ) *

32.  Compensation of Directors          ) *

33.  Compensation of Employees          ) *

34.  Compensation to other persons      ) Unitholder Explanations


             IV.  Distribution and Redemption of Securities

35.  Distribution of trust's securities Introduction
       by states                        Settlement of Bonds in the Trusts

36.  Suspension of sales of trust's     ) *
       securities                       )

37.  Revocation of authority to distribute) *

38.  (a)  Method of distribution        )

     (b)  Underwriting agreements       ) Unitholder Explanations

     (c)  Selling agreements            )

39.  (a)  Organization of principal     )
           underwriter                  )
                                        ) Trust Administration
     (b)  N.A.S.D. membership by        )
           principal underwriter        )

40.  Certain fees received by           ) *
       principal underwriter            )

41.  (a)  Business of principal underwriter)  Trust Administration
                                        )

     (b)  Branch offices of principal   ) *
           underwriter                  )

     (c)  Salesmen of principal underwriter)  *
                                        )

42.  Ownership of securities of the trust)  *
                                        )

43.  Certain brokerage commissions      ) *
       received by principal underwriter)

44.  (a)  Method of valuation           ) Introduction
                                        ) Summary of Essential Financial
                                        )   Information
                                        ) Unitholder Explanations
                                        ) Trust Administration

     (b)  Schedule as to offering price ) *

     (c)  Variation in offering price   ) Unitholder Explanations
           to certain persons           )

45.  Suspension of redemption rights    ) *

46.  (a)  Redemption valuation          ) Unitholder Explanations
                                        ) Trust Administration

     (b)  Schedule as to redemption price)  *
                                        )

47.  Purchase and sale of interests     ) Unitholder Explanations
       in underlying securities         ) Trust Administration


           V.  Information Concerning the Trustee or Custodian

48.  Organization and regulation of     )  Trust Administration
       trustee                          )

49.  Fees and expenses of trustee       ) Summary of Essential Financial
                                        )   Information
                                        ) Trust Administration

50.  Trustee's lien                     ) Trust Administration


     VI.  Information Concerning Insurance of Holders of Securities

51.  Insurance of holders of trust's    )
       securities                       ) *


                       VII.  Policy of Registrant

52.  (a)  Provisions of trust agreement   ) Trust Administration
           with respect to replacement or )
           elimination of portfolio       )
           securities                     )

     (b)  Transactions involving elimination)
           of underlying securities       ) *

     (c)  Policy regarding substitution or)  Trust Administration
           elimination of underlying      )
           securities                     )

     (d)  Fundamental policy not          ) *
           otherwise covered              )

53.  Tax Status of trust                  ) Trust Information
                                          ) Other Matters


              VIII.  Financial and Statistical Information

54.  Trust's securities during last ten ) *
       years                            )

55.                                     )

56.  Certain information regarding      ) *

57.  periodic payment certificates      )

58.                                     )

59.  Financial statements (Instructions ) Other Matters
       1(c) to Form S-6)                )

_________________________________
* Inapplicable, omitted, answer negative or not required

Information contained herein is subject to completion or amendment. A
registration statement relating to these securities has been filed
with the Securities and Exchange Commission.  These securities may
not be sold nor may offers to buy be accepted prior to the time the
registration statement becomes effective.  This Prospectus shall
not constitute an offer to sell or the solicitation of an offer to
buy nor shall there be any sale of these securities in any State in
which such offer, solicitation or sale would be unlawful prior to
registration or qualification under the securities laws of any State.

                PRELIMINARY PROSPECTUS DATED FEBRUARY 24, 1994
                            SUBJECT TO COMPLETION
   
February 24, 1994                        Van Kampen Merritt

INSURED MUNICIPALS INCOME TRUST, 155TH INSURED MULTI-SERIES

IM-IT 318
IM-IT 90th Short Intermediate
Florida IM-IT Intermediate Laddered Maturity Series 6
Pennsylvania IM-IT 182
    
In the opinion of counsel, interest to the Fund and to Unitholders, with
certain exceptions, is excludable under existing law from gross income for
Federal income taxes. In addition, the interest income of each State Trust is,
in the opinion of counsel, exempt to the extent indicated from state and local
taxes, when held by residents of the state where the issuers of Bonds in such
Trust are located. Capital gains, if any, are subject to Federal tax.
   
      THE FUND.  The objectives of the Fund are Federal and, in the case of a
State Trust, state tax-exempt income and conservation of capital through an
investment in a diversified, insured portfolio of tax-exempt bonds. The Fund
consists of four underlying separate unit investment trusts designated as
Insured Municipals Income Trust, Series 318 (the "IM-IT"), Insured Municipals
Income Trust, 90th Short Intermediate Series (the "IM-IT Short Intermediate
Trust"), Florida IM-IT Intermediate Laddered Maturity Series 6 (the "Florida
IM-IT Intermediate Laddered Maturity Trust") and Pennsylvania Insured
Municipals Income Trust, Series 182 (the "Pennsylvania IM-IT Trust"). The
various trusts are collectively referred to herein as the "Trusts", the
Florida IM-IT Intermediate Laddered Maturity and Pennsylvania IM-IT Trusts are
sometimes collectively referred to herein as the "State Trusts", while the
IM-IT, IM-IT Short Intermediate, Florida IM-IT Intermediate Laddered Maturity
and Pennsylvania IM-IT Trusts are sometimes collectively referred to herein as
the "Insured Trusts" and the Florida IM-IT Intermediate Laddered Maturity
Trust is sometimes referred to herein as the "State Intermediate Laddered
Maturity Trust". Each Trust initially consists of delivery statements relating
to contracts to purchase securities and, thereafter, will consist of such
securities as may continue to be held (the "Bonds" or "Securities"). Such
Securities are interest-bearing obligations issued by or on behalf of
municipalities and other governmental authorities, the interest on which is,
in the opinion of recognized bond counsel to the issuing governmental
authority, exempt from all Federal income taxes under the existing law. In
addition, the interest income of each State Trust is, in the opinion of
counsel, exempt to the extent indicated from state and local taxes, when held
by residents of the state where the issuers of Bonds in such Trust are
located.

     "AAA" RATING FOR THE INSURED TRUSTS.  Insurance guaranteeing the payments
of principal and interest, when due, on the Securities in the portfolio of
each Insured Trust has been obtained from a municipal bond insurance company
either by such Trust or by the issuer of the Bonds involved, by a prior owner
of the Bonds or by the Sponsor prior to the deposit of such Bonds in an
Insured Trust. See "Unitholder Explanations--Insurance on the Bonds in the
Insured Trusts" on page 20. Insurance obtained by an Insured Trust applies
only while Bonds are retained in such Trust while insurance obtained on
Preinsured Bonds is effective so long as such Bonds are outstanding. The
Trustee, upon the sale of a Bond insured under an insurance policy obtained by
an Insured Trust, has a right to obtain from the insurer involved permanent
insurance for such Bond upon the payment of a single predetermined insurance
premium and any expenses related thereto from the proceeds of the sale of such
Bond. INSURANCE RELATES ONLY TO THE BONDS IN A TRUST AND NOT TO THE UNITS
OFFERED HEREBY OR TO THE MARKET VALUE THEREOF. As a result of such insurance,
the Units of each Insured Trust have received a rating of "AAA" by Standard &
Poor's Corporation. Standard & Poor's Corporation has indicated that this
rating is not a recommendation to buy, hold or sell Units nor does it take
into account the extent to which expenses of each Insured Trust or sales by
each Insured Trust of Bonds for less than the purchase price paid by such
Trust will reduce payments to Unitholders of the interest and principal
required to be paid on such Bonds. See "Unitholder Explanations--Insurance on
the Bonds in the Insured Trusts". No representation is made as to any
insurer's ability to meet its commitments.

     PUBLIC OFFERING PRICE.  The Public Offering Price of the Units of each
Trust during the initial offering period is equal to the aggregate offering
price of the Securities in such Trust's portfolio and cash, if any, in the
Principal Account held or owned by such Trust Fund plus the applicable sales
charge plus Purchased Interest and accrued interest, if any. After the initial
public offering period, the secondary market Public Offering Price of each
Trust will be equal to the aggregate bid price of the Securities in such Trust
and cash, if any, in the Principal Account held or owned by such Trust Fund
plus the applicable sales charge plus Purchased Interest and accrued interest,
if any. Sales charges for the Trusts in the initial market, expressed both as
a percentage of the Public Offering Price (excluding Purchased Interest) and
as a percentage of the aggregate offering price of the Securities, are set
forth in footnote (2) under "Summary of Essential Financial Information". For
sales charges in the secondary market, see "Unitholder Explanations--Public
Offering". If the Securities in each Trust were available for direct purchase
by investors, the purchase price of the Securities would not include the sales
charge included in the Public Offering Price of the Units. During the initial
offering period, the sales charge is reduced on a graduated scale for sales
involving at least 100 Units. If Units were available for purchase at the
opening of business on the Date of Deposit (except for the IM-IT and the
Pennsylvania IM-IT Trust as of 8:00 A.M. Central Time on the Date of Deposit)
, the Public Offering Price per Unit would have been that amount set forth in
the "Summary of Essential Financial Information" for each Trust. See
"Unitholder Explanations--Public Offering".
    
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 <PAGE>
2                                Introduction
   
      ESTIMATED CURRENT RETURN AND ESTIMATED LONG-TERM RETURN. The annual
Estimated Current Return and Estimated Long-Term Return to Unitholders at the
opening of business (except for the IM-IT and the Pennsylvania
IM-IT Trust as of 8:00 A.M. Central Time on the Date of Deposit) on February
24, 1994, were as set forth under "Per Unit Information" for each Trust. The
methods of calculating Estimated Current Return and Estimated Long-Term Return
are set forth in the footnotes to the "Per Unit Information" for each Trust.
    
     OBJECTIVES OF THE FUND. The objectives of the Fund are income exempt from
Federal income tax and, in the case of a State Trust, Federal and state income
tax (if any) and conservation of capital through an investment in diversified
portfolios of Federal and state tax-exempt obligations. There is, of course,
no guarantee that the Fund will achieve its objectives. The Fund may be an
appropriate investment vehicle for investors who desire to participate in a
portfolio of tax-exempt fixed income securities with greater diversification
than they might be able to acquire individually. In addition, securities of
the type deposited in the Fund are often not available in small amounts.

     DISTRIBUTIONS. Purchasers of Units will receive distributions on a
monthly basis. See "Unitholder Explanations--Settlement of Bonds in the
Trusts". Record dates will be the first day of each month. Distributions will
be made on the fifteenth day of the month subsequent to the respective record
dates.

     MARKET FOR UNITS. Although not obligated to do so, the Sponsor, Van
Kampen Merritt Inc., intends to, and certain of the other Underwriters may,
maintain a secondary market for the Units at prices based upon the aggregate
bid prices of the Securities in the respective Trusts plus Purchased Interest;
however, during the initial offering period such prices will be based upon the
aggregate offering prices of the Securities plus Purchased Interest. If such a
market is not maintained and no other over-the-counter market is available, a
Unitholder will be able to dispose of his Units only through redemption at
prices based upon the bid prices of the underlying Securities plus Purchased
Interest (see "Unitholder Explanations--Public Offering--Redemption of Units"
and "Unitholder Explanations-- Public Offering--Market for Units").

     REINVESTMENT OPTION. Unitholders have the opportunity to have their
distributions reinvested into an open-end, management investment company as
described herein. See "Unitholder Explanations--Public Offering-- Reinvestment
Option".
 <PAGE>
                  Summary of Essential Financial Information                 3
   
<TABLE>
                       INSURED MUNICIPALS INCOME TRUST,

                          155TH INSURED MULTI-SERIES

                  SUMMARY OF ESSENTIAL FINANCIAL INFORMATION

     AT THE OPENING OF BUSINESS ON THE DATE OF DEPOSIT: FEBRUARY 24, 1994

(EXCEPT FOR THE IM-IT AND THE PENNSYLVANIA IM-IT TRUST AS OF 8:00 A.M. CENTRAL
                                     TIME
                           ON THE DATE OF DEPOSIT)

            SPONSOR: VAN KAMPEN MERRITT INC.
          EVALUATOR: AMERICAN PORTFOLIO EVALUATION SERVICES
                     (A DIVISION OF A SUBSIDIARY OF THE SPONSOR)
            TRUSTEE: THE BANK OF NEW YORK
<CAPTION>

                                                                                                 FLORIDA
                                                                                                  IM-IT
                                                                            IM-IT SHORT       INTERMEDIATE
                                                                           INTERMEDIATE         LADDERED         PENNSYLVANIA
GENERAL INFORMATION                                         IM-IT              TRUST         MATURITY TRUST       IM-IT TRUST
<S>                                                    <C>                <C>                <C>                <C>
Principal Amount (Par Value) of Securities in
  Trust.............................................   $    9,825,000     $     6,030,000    $     3,000,000    $     3,010,000
Number of Units.....................................            9,955               6,030              3,000              3,050
Fractional Undivided Interest in the Trust per
  Unit..............................................          1/9,955             1/6,030            1/3,000            1/3,050
Principal Amount (Par Value) of Securities per Unit
  <F1>..............................................   $       986.94     $      1,000.00    $      1,000.00    $        986.89
Public Offering Price:
    Aggregate Offering Price of Securities in
    Portfolio.......................................   $    9,403,211     $     5,985,039    $     2,974,860    $     2,877,561
    Aggregate Offering Price of Securities per
    Unit............................................   $       944.57     $        992.54    $        991.62    $        943.46
    Sales Charge <F2>...............................   $        48.67     $         30.69    $         30.66    $         48.61
    Purchased Interest <F3>.........................   $       67,317     $        34,369    $        15,063    $        24,186
    Purchased Interest per Unit <F3>................   $         6.76     $          5.70    $          5.02    $          7.93
    Public Offering Price per Unit <F3>.............   $     1,000.00     $      1,028.93    $      1,027.30    $      1,000.00
Redemption Price per Unit, including Purchased
  Interest <F3>.....................................   $       943.96     $        990.75    $        989.02    $        943.76
Secondary Market Repurchase Price per Unit,
  including Purchased Interest <F3>.................   $       951.33     $        998.24    $        996.64    $        951.39
Excess of Public Offering Price per Unit Over
  Redemption Price per Unit.........................   $        56.04     $         38.18    $         38.28    $         56.24
Excess of Sponsor's Initial Repurchase Price per
  Unit Over Redemption Price per Unit...............   $         7.37     $          7.49    $          7.62    $          7.63
Minimum Value of the Trust under which Trust
  Agreement may be terminated.......................   $    1,965,000     $     1,206,000    $       600,000    $       602,000

Minimum Principal Distribution.......... $1.00 per Unit
First Settlement Date................... March 3, 1994
Evaluator's Annual Supervisory Fee...... Maximum of $0.25 per Unit
Evaluator's Annual Evaluation Fee....... $0.30 per $1,000 principal amount of
                                         Bonds <F4>

    Evaluations for purpose of sale, purchase or redemption of Units are made
    as of 4:00 P.M. Eastern time on days of trading on the New York Stock
    Exchange next following receipt of an order for a sale or purchase of
    Units or receipt by The Bank of New York of Units tendered for redemption.
<FN>
<F1>Many unit investment trusts comprised of municipal securities issue a
    number of units such that each unit represents approximately $1,000
    principal amount of underlying securities. The Sponsor, on the other hand,
    in determining the number of Units for each Trust, other than IM-IT
    Limited Maturity, IM-IT Intermediate, State Intermediate Laddered Maturity
    and IM-IT Short Intermediate Trusts, has elected not to follow this format
    but rather to provide that number of Units which will establish as close
    as possible as of the Date of Deposit a Public Offering Price per Unit of
    $1,000. For IM-IT Limited Maturity, IM-IT Intermediate, State Intermediate
    Laddered Maturity and IM-IT Short Intermediate Trusts, on the other hand,
    each unit represents $1,000 principal amount of underlying securities in
    such Trust on the Date of Deposit.
 <PAGE>
4                 Summary of Essential Financial Information

<F2>Sales charges for the Trusts, expressed as a percentage of the Public
    Offering Price per Unit (excluding Purchased Interest) and in parenthesis
    as a percentage of the aggregate offering price of the Securities, are as
    follows: an IM-IT or a State Trust (other than a State Intermediate
    Laddered Maturity Trust)  - 4.9% (5.152%); an IM-IT Limited Maturity
    Trust - 4.3% (4.493%); an IM-IT Intermediate Trust - 3.9% (4.058%); an
    IM-IT Short Intermediate Trust or a State Intermediate Laddered Maturity
    Trust  - 3.0% (3.093%).
<F3>Purchased Interest is a portion of the unpaid interest that has accrued on
    the Bonds from the later of the last payment date on the Bonds or the date
    of issuance thereof through the First Settlement Date and is included in
    the calculation of the Public Offering Price. Purchased Interest will be
    distributed to Unitholders as Units are redeemed or Securities mature or
    are called. Anyone ordering Units for settlement after the First
    Settlement Date will pay accrued interest from such date to the date of
    settlement (normally five business days after order) less distributions
    from the Interest Account subsequent to the First Settlement Date. For
    purchases settling on the First Settlement Date, no accrued interest will
    be added to the Public Offering Price other than the Purchased Interest
    already included therein. After the initial offering period, the Sponsor's
    Repurchase Price per Unit will be determined as described under the
    caption "Public Offering-- Market for Units."
<F4>Such fee is based on the outstanding principal amount of Securities in
    each Trust on the Date of Deposit for the first year and as of the close
    of business on January 1 for each year thereafter.
</TABLE>
    
 <PAGE>
                           Unitholder Explanations                           5

SETTLEMENT OF BONDS IN THE TRUSTS
   
     THE FUND. Insured Municipals Income Trust, 155th Insured Multi-Series
(the "Fund"), was created under the laws of the State of New York pursuant to
a Trust Indenture and Agreement (the "Trust Agreement"), dated the Date of
Deposit, among Van Kampen Merritt Inc., as Sponsor, American Portfolio
Evaluation Services, a division of Van Kampen Merritt Investment Advisory
Corp., as Evaluator, and The Bank of New York, as Trustee.

     The Fund consists of four separate portfolios of delivery statements
relating to contracts to purchase interest-bearing obligations issued by or on
behalf of states and territories of the United States, and political
subdivisions and authorities thereof, the interest on which is, in the opinion
of recognized bond counsel to the issuing authorities, excludable from gross
income for Federal income tax under existing law. All issuers of Securities in
a State Trust are located in the State for which such Trust is named or in
United States territories or possessions and their public authorities;
consequently, in the opinion of recognized bond counsel to such State issuers,
the related interest earned on such Securities is exempt to the extent
indicated from state and local taxes of such State. With the exception of the
New York and Pennsylvania Trusts, Units of such Trusts may be purchased only
by residents of the State for which such Trust is named. Units of a New York
Trust may be purchased by residents of New York, Connecticut, Florida and
Massachusetts. Units of a Pennsylvania Trust may be purchased by residents of
Pennsylvania, Connecticut, Florida, Maryland, New York, Ohio and West
Virginia. Offerees in the States of Indiana, Virginia and Washington may
purchase Units of the IM-IT and IM-IT Short Intermediate Trusts only. On the
Date of Deposit, the Sponsor deposited with the Trustee the aggregate
principal amount of Securities in each Trust as indicated under "General
Information-- Principal Amount (Par Value) of Securities in Trust" in the
"Summary of Essential Financial Information". Such Securities consist of
delivery statements relating to contracts for the purchase of certain
interest-bearing obligations and cash, cash equivalents and/or irrevocable
letters of credit issued by a financial institution in the amount required for
such purchases. Thereafter, the Trustee, in exchange for the Securities so
deposited, delivered to the Sponsor the certificates evidencing the ownership
of the number of Units in each Trust as indicated under "Summary of Essential
Financial Information." Unless otherwise terminated as provided herein, the
Trust Agreement for any IM-IT or State Trust (other than a State Intermediate
Laddered Maturity Trust) will terminate at the end of the calendar year prior
to the fiftieth anniversary of its execution, and the Trust Agreement for any
IM-IT Limited Maturity Trust, IM-IT Intermediate Trust, State Intermediate
Laddered Maturity Trust or IM-IT Short Intermediate Trust will terminate at
the end of the calendar year prior to the twentieth anniversary of its
execution.

     The portfolio of any IM-IT or State Trust (other than a State
Intermediate Laddered Maturity Trust) consists of Bonds maturing approximately
15 to 40 years from the Date of Deposit. The approximate range of maturities
from the Date of Deposit for Bonds in any IM-IT Limited Maturity Trust, IM-IT
Intermediate Trust, State Intermediate Laddered Maturity Trust and IM-IT Short
Intermediate Trust is 12 to 15 years, 5 to 15 years, 5 to 10 years and 3 to 7
years, respectively. The dollar-weighted average maturity of the Bonds in any
IM-IT Intermediate Trust, State Intermediate Laddered Maturity Trust and IM-IT
Short Intermediate Trust is less than or equal to 10 years, 10 years and 5
years, respectively.

     The portfolio of any State Intermediate Laddered Maturity Trust is
structured so that approximately 20% of the Bonds contained in such portfolio
will mature each year, commencing in approximately the fifth year of the
Trust, entitling each Unitholder to a return of principal. This return of
principal may offer Unitholders the opportunity to respond to changing
economic conditions and to specific financial needs that may arise between the
fifth and tenth years of a State Intermediate Laddered Maturity Trust.
However, the flexibility provided by the return of principal may at the same
time eliminate a Unitholder's ability to reinvest the amount returned at a
rate as high as the implicit yield on the obligations which matured.
    
     Certain of the Bonds in certain of the Trusts may be "zero coupon" bonds.
See footnote (6) in "Notes to Portfolios". Zero coupon bonds are purchased at
a deep discount because the buyer receives only the right to receive a final
payment at the maturity of the bond and does not receive any periodic interest
payments. The effect of owning deep discount bonds which do not make current
interest payments (such as the zero coupon bonds) is that a
 <PAGE>
6                          Unitholder Explanations
fixed yield is earned not only on the original investment but also, in effect,
on all discount earned during the life of such obligation. This implicit
reinvestment of earnings at the same rate eliminates the risk of being unable
to reinvest the income on such obligation at a rate as high as the implicit
yield on the discount obligation, but at the same time eliminates the holder's
ability to reinvest at higher rates in the future. For this reason, zero
coupon bonds are subject to substantially greater price fluctuations during
periods of changing market interest rates than are securities of comparable
quality which pay interest.

     Certain of the Bonds in certain of the Trusts may have been purchased on
a "when, as and if issued" or "delayed delivery" basis. See footnote (5) in
"Notes to Portfolios". The delivery of any such Securities may be delayed or
may not occur. Interest on these Securities begins accruing to the benefit of
Unitholders on their respective dates of delivery. To the extent any
Securities are actually delivered to the Fund after their respective expected
dates of delivery, Unitholders who purchase their Units prior to the date such
Securities are actually delivered to the Trustee would be required to adjust
their tax basis in their Units for a portion of the interest accruing on such
Securities during the interval between their purchase of Units and the actual
delivery of such Securities. As a result of any such adjustment, the Estimated
Current Returns during the first year would be slightly lower than those
stated herein which would be the returns after the first year, assuming the
portfolio of a Trust and estimated annual expenses other than that of the
Trustee (which may be reduced in the first year only) do not vary from that
set forth under "Per Unit Information" for the applicable Trust. Holders of
the Units will be "at risk" with respect to all Securities in the portfolios
including "when, as and if issued" and "delayed delivery" Securities (i.e.,
may derive either gain or loss from fluctuations in the evaluation of such
Securities) from the date they commit for Units. For a discussion of the
Sponsor's obligations in the event of the failure of any contract for the
purchase of any of the Securities and limited right to substitute other
tax-exempt bonds to replace any failed contract, see "Replacement Bonds"
below.

     Each Unit initially offered represents the fractional undivided interest
in the principal and net income of a Trust indicated under "Summary of
Essential Financial Information". To the extent that any Units are redeemed by
the Trustee, the fractional undivided interest in a Trust represented by each
unredeemed Unit will increase, although the actual interest in such Trust
represented by such fraction will remain unchanged. Units will remain
outstanding until redeemed upon tender to the Trustee by Unitholders, which
may include the Sponsor or the Underwriters, or until the termination of the
Trust Agreement.
   
     OBJECTIVES AND SECURITIES SELECTION. The objectives of the Fund are
income exempt from Federal income taxation and, in the case of a State Trust,
Federal and state (to the extent indicated) income taxation and conservation
of capital through an investment in diversified portfolios of Federal and
state (to the extent indicated) tax-exempt obligations. A State Intermediate
Laddered Maturity Trust has additional objectives of providing protection
against changes in interest rates and investment flexibility through an
investment in a laddered portfolio of intermediate-term interest-bearing
obligations with maturities ranging from approximately 5 to 10 years in which
roughly 20% of the obligations contained in such portfolio will mature each
year commencing in approximately the fifth year of the Trust. There is, of
course, no guarantee that the Trusts will achieve their respective objectives.
The Fund may be an appropriate investment vehicle for investors who desire to
participate in a portfolio of tax-exempt fixed income securities with greater
diversification than they might be able to acquire individually. In addition,
securities of the type deposited in the Fund are often not available in small
amounts.
    
     Insurance guaranteeing the timely payment, when due, of all principal and
interest on the Bonds in each Insured Trust has been obtained by such Trust
from either AMBAC Indemnity Corporation ("AMBAC Indemnity"), Financial
Guaranty Insurance Company ("Financial Guaranty" or "FGIC") or a combination
thereof (collectively, the "Portfolio Insurers"), or by the issuer of such
Bonds, by a prior owner of such Bonds, or by the Sponsor prior to the deposit
of such Bonds in such Trust from (1) AMBAC Indemnity or one of its
subsidiaries, American Municipal Bond Assurance Corporation ("AMBAC") or MGIC
Indemnity Corporation ("MGIC Indemnity"), (2) Financial Guaranty, (3)
Municipal Bond Investors Assurance Corporation ("MBIA"), (4) Bond Investors
Guaranty Insurance Company ("BIG"), (5) National Union Fire Insurance Company
of Pittsburgh, PA. ("National Union"), (6) Capital Guaranty Insurance Company
("Capital Guaranty"), (7) Capital Markets Assurance Corporation ("CapMAC")
and/or (8) Financial Security Assurance Inc. ("Financial Security" or "FSA")
(collectively, the "Preinsured Bond Insurers") (see
 <PAGE>
                           Unitholder Explanations                           7
"Unitholder Explanations--Insurance on the Bonds in the Insured Trusts").
Insurance obtained by an Insured Trust is effective only while the Bonds thus
insured are held in such Trust. The Trustee has the right to acquire permanent
insurance from a Portfolio Insurer with respect to each Bond insured by the
respective Portfolio Insurer under a Trust portfolio insurance policy.
Insurance relating to Bonds insured by the issuer, by a prior owner of such
Bonds or by the Sponsor is effective so long as such Bonds are outstanding.
Bonds insured under a policy of insurance obtained by the issuer, by a prior
owner of such Bonds or by the Sponsor from one of the Preinsured Bond Insurers
(the "Preinsured Bonds") are not additionally insured by an Insured Trust. No
representation is made as to any insurer's ability to meet its commitments.

     Neither the Public Offering Price nor any evaluation of Units for
purposes of repurchases or redemptions reflects any element of value for the
insurance obtained by an Insured Trust, if any, unless Bonds are in default in
payment of principal or interest or in significant risk of such default. See
"Unitholder Explanations--Public Offering--Offering Price". On the other hand,
the value, if any, of Preinsured Bond insurance is reflected and included in
the market value of such Bonds.

     In order for bonds to be eligible for insurance, they must have credit
characteristics which would qualify them for at least the Standard & Poor's
Corporation rating of "BBB-" or at least the Moody's Investors Service, Inc.
rating of "Baa", which in brief represent the lowest ratings for securities of
investment grade (see "Other Matters--Description of Securities Ratings").
Insurance is not a substitute for the basic credit of an issuer, but
supplements the existing credit and provides additional security therefor. If
an issue is accepted for insurance, a non-cancellable policy for the prompt
payment of interest and principal on the bonds, when due, is issued by the
insurer. Any premium or premiums relating to Preinsured Bond insurance is paid
by the issuer, by a prior owner of such Bonds or by the Sponsor and a monthly
premium is paid by an Insured Trust for the portfolio insurance, if any,
obtained by such Trust. The Trustee has the right to obtain permanent
insurance from a Portfolio Insurer in connection with the sale of a Bond
insured under the insurance policy obtained from the respective Portfolio
Insurer by an Insured Trust upon the payment of a single predetermined
insurance premium from the proceeds of the sale of such Bond. Accordingly, any
Bond in an Insured Trust is eligible to be sold on an insured basis. All Bonds
insured by the Portfolio Insurers and the Preinsured Bond Insurers receive a
"AAA" rating by Standard & Poor's Corporation. See "Unitholder
Explanations--Insurance on the Bonds in the Insured Trusts".

     In selecting Securities for the Trusts the following facts, among others,
were considered by the Sponsor: (a) either the Standard & Poor's Corporation
rating of the Securities was in no case less than "BBB-" in the case of the
Insured Trusts, or the Moody's Investors Service, Inc. rating of the
Securities was in no case less than "Baa" in the case of the Insured Trusts,
including provisional or conditional ratings, respectively, or, if not rated,
the Securities had, in the opinion of the Sponsor, credit characteristics
sufficiently similar to the credit characteristics of interest-bearing
tax-exempt obligations that were so rated as to be acceptable for acquisition
by the Fund (see "Other Matters-- Description of Securities Ratings"), (b) the
prices of the Securities relative to other bonds of comparable quality and
maturity, (c) the diversification of Securities as to purpose of issue and
location of issuer and (d) with respect to the Insured Trusts, the
availability and cost of insurance for the prompt payment of principal and
interest, when due, on the Securities. Subsequent to the Date of Deposit, a
Security may cease to be rated or its rating may be reduced below the minimum
required as of the Date of Deposit. Neither event requires elimination of such
Security from the portfolio of a Trust but may be considered in the Sponsor's
determination as to whether or not to direct the Trustee to dispose of the
Security (see "Trust Administration--Fund Administration and
Expenses--Portfolio Administration").

     To the best knowledge of the Sponsor, there is no litigation pending as
of the Date of Deposit in respect of any Securities which might reasonably be
expected to have a material adverse effect upon the Fund or any of the Trusts.
At any time after the Date of Deposit, litigation may be initiated on a
variety of grounds with respect to Securities in the Fund. Such litigation,
as, for example, suits challenging the issuance of pollution control revenue
bonds under environmental protection statutes, may affect the validity of such
Securities or the tax-free nature of the interest thereon. While the outcome
of litigation of such nature can never be entirely predicted, the Fund has
received or will receive opinions of bond counsel to the issuing authorities
of each Security on the date of issuance to the effect that such Securities
have been validly issued and that the interest thereon is exempt from Federal
income tax. In addition,
 <PAGE>
8                          Unitholder Explanations
other factors may arise from time to time which potentially may impair the
ability of issuers to meet obligations undertaken with respect to the
Securities.

     PORTFOLIO CONCENTRATIONS. Certain of the Bonds in certain of the Trusts
may be general obligations of a governmental entity that are backed by the
taxing power of such entity. In view of this an investment in such a Trust
should be made with an understanding of the characteristics of such issuers
and the risks which such an investment may entail. All other Bonds in the
Trusts are revenue bonds payable from the income of a specific project or
authority and are not supported by the issuer's power to levy taxes. General
obligation bonds are secured by the issuer's pledge of its faith, credit and
taxing power for the payment of principal and interest. Revenue bonds, on the
other hand, are payable only from the revenues derived from a particular
facility or class of facilities or, in some cases, from the proceeds of a
special excise tax or other specific revenue source. There are, of course,
variations in the security of the different Bonds in the Fund, both within a
particular classification and between classifications, depending on numerous
factors. See "General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be obligations which
derive their payments from mortgage loans. Certain of such housing bonds may
be FHA insured or may be single family mortgage revenue bonds issued for the
purpose of acquiring from originating financial institutions notes secured by
mortgages on residences located within the issuer's boundaries and owned by
persons of low or moderate income. In view of this an investment in such a
Trust should be made with an understanding of the characteristics of such
issuers and the risks which such an investment may entail. Mortgage loans are
generally partially or completely prepaid prior to their final maturities as a
result of events such as sale of the mortgaged premises, default, condemnation
or casualty loss. Because these bonds are subject to extraordinary mandatory
redemption in whole or in part from such prepayments of mortgage loans, a
substantial portion of such bonds will probably be redeemed prior to their
scheduled maturities or even prior to their ordinary call dates. Extraordinary
mandatory redemption without premium could also result from the failure of the
originating financial institutions to make mortgage loans in sufficient
amounts within a specified time period. Additionally, unusually high rates of
default on the underlying mortgage loans may reduce revenues available for the
payment of principal of or interest on such mortgage revenue bonds. These
bonds were issued under Section 103A of the Internal Revenue Code, which
Section contains certain requirements relating to the use of the proceeds of
such bonds in order for the interest on such bonds to retain its tax-exempt
status. In each case the issuer of the bonds has covenanted to comply with
applicable requirements and bond counsel to such issuer has issued an opinion
that the interest on the bonds is exempt from Federal income tax under
existing laws and regulations. Certain issuers of housing bonds have
considered various ways to redeem bonds they have issued prior to the stated
first redemption dates for such bonds. In connection with the housing bonds
held by the Fund, the Sponsor at the Date of Deposit is not aware that any of
the respective issuers of such Bonds are actively considering the redemption
of such Bonds prior to their respective stated initial call dates. See
"General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be health care revenue
bonds. In view of this an investment in such a Trust should be made with an
understanding of the characteristics of such issuers and the risks which such
an investment may entail. Ratings of bonds issued for health care facilities
are often based on feasibility studies that contain projections of occupancy
levels, revenues and expenses. A facility's gross receipts and net income
available for debt service may be affected by future events and conditions
including, among other things, demand for services and the ability of the
facility to provide the services required, physicians' confidence in the
facility, management capabilities, competition with other health care
facilities, efforts by insurers and governmental agencies to limit rates,
legislation establishing state rate-setting agencies, expenses, the cost and
possible unavailability of malpractice insurance, the funding of Medicare,
Medicaid and other similar third party payor programs, government regulation
and the termination or restriction of governmental financial assistance,
including that associated with Medicare, Medicaid and other similar third
party payor programs. Pursuant to recent Federal legislation, Medicare
reimbursements are currently calculated on a prospective basis utilizing a
single nationwide schedule of rates. Prior to such legislation Medicare
reimbursements were based on the actual costs incurred by the health facility.
The current legislation may adversely affect reimbursements to hospitals and
other facilities for services provided under the Medicare program. Such
adverse changes also may adversely affect the ratings of Securities held in
the portfolios of
 <PAGE>
                           Unitholder Explanations                           9
the Fund; however, because of the insurance obtained by each of the Insured
Trusts, the "AAA" rating of the Units of each of the Insured Trusts would not
be affected. See "General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be obligations of
public utility issuers, including those selling wholesale and retail electric
power and gas. In view of this an investment in such a Trust should be made
with an understanding of the characteristics of such issuers and the risks
which such an investment may entail. General problems of such issuers would
include the difficulty in financing large construction programs in an
inflationary period, the limitations on operations and increased costs and
delays attributable to environmental considerations, the difficulty of the
capital market in absorbing utility debt, the difficulty in obtaining fuel at
reasonable prices and the effect of energy conservation. All of such issuers
have been experiencing certain of these problems in varying degrees. In
addition, Federal, state and municipal governmental authorities may from time
to time review existing, and impose additional, regulations governing the
licensing, construction and operation of nuclear power plants, which may
adversely affect the ability of the issuers of certain of the Bonds in the
portfolio to make payments of principal and/or interest on such Bonds. See
"General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be obligations of
issuers whose revenues are derived from the sale of water and/or sewerage
services. In view of this an investment in such a Trust should be made with an
understanding of the characteristics of such issuers and the risks which such
an investment may entail. Such Bonds are generally payable from user fees. The
problems of such issuers include the ability to obtain timely and adequate
rate increases, population decline resulting in decreased user fees, the
difficulty of financing large construction programs, the limitations on
operations and increased costs and delays attributable to environmental
considerations, the increasing difficulty of obtaining or discovering new
supplies of fresh water, the effect of conservation programs and the impact of
"no-growth" zoning ordinances. All of such issuers have been experiencing
certain of these problems in varying degrees. See "General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be industrial revenue
bonds ("IRBs"). In view of this an investment in such a Trust should be made
with an understanding of the characteristics of such issuers and the risks
which such an investment may entail. IRBs have generally been issued under
bond resolutions pursuant to which the revenues and receipts payable under the
arrangements with the operator of a particular project have been assigned and
pledged to purchasers. In some cases, a mortgage on the underlying project may
have been granted as security for the IRBs. Regardless of the structure,
payment of IRBs is solely dependent upon the creditworthiness of the corporate
operator of the project or corporate guarantor. Corporate operators or
guarantors may be affected by many factors which may have an adverse impact on
the credit quality of the particular company or industry. These include
cyclicality of revenues and earnings, regulatory and environmental
restrictions, litigation resulting from accidents or environmentally-caused
illnesses, extensive competition and financial deterioration resulting from a
corporate restructuring pursuant to a leveraged buy-out, takeover or
otherwise. Such a restructuring may result in the operator of a project
becoming highly leveraged which may impact on such operator's creditworthiness
which in turn would have an adverse impact on the rating and/or market value
of such Bonds. Further, the possibility of such a restructuring may have an
adverse impact on the market for and consequently the value of such Bonds,
even though no actual takeover or other action is ever contemplated or
effected. See "General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be obligations that are
secured by lease payments of a governmental entity (hereinafter called "lease
obligations"). Lease obligations are often in the form of certificates of
participation. In view of this an investment in such a Trust should be made
with an understanding of the characteristics of such issuers and the risks
which such an investment may entail. Although the lease obligations do not
constitute general obligations of the municipality for which the
municipality's taxing power is pledged, a lease obligation is ordinarily
backed by the municipality's covenant to appropriate for and make the payments
due under the lease obligation. However, certain lease obligations contain
"non-appropriation" clauses which provide that the municipality has no
obligation to make lease payments in future years unless money is appropriated
for such purpose on a yearly basis. A governmental entity that enters into
such a lease agreement cannot obligate future governments to appropriate for
and make lease payments but covenants to take such action as is necessary to
include any lease payments due in its budgets and to make the appropriations
therefor. A governmental entity's failure to appropriate for
 <PAGE>
10                         Unitholder Explanations
and to make payments under its lease obligation could result in insufficient
funds available for payment of the obligations secured thereby. Although
"non-appropriation" lease obligations are secured by the leased property,
disposition of the property in the event of foreclosure might prove difficult.
See "General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be obligations of
issuers which are, or which govern the operation of, schools, colleges and
universities and whose revenues are derived mainly from ad valorem taxes or
for higher education systems, from tuition, dormitory revenues, grants and
endowments. In view of this an investment in such a Trust should be made with
an understanding of the characteristics of such issuers and the risks which
such an investment may entail. General problems relating to school bonds
include litigation contesting the State constitutionality of financing public
education in part from ad valorem taxes, thereby creating a disparity in
educational funds available to schools in wealthy areas and schools in poor
areas. Litigation or legislation on this issue may affect the sources of funds
available for the payment of school bonds in the Trusts. General problems
relating to college and university obligations include the prospect of a
declining percentage of the population consisting of "college" age
individuals, possible inability to raise tuitions and fees sufficiently to
cover increased operating costs, the uncertainty of continued receipt of
Federal grants and state funding, and government legislation or regulations
which may adversely affect the revenues or costs of such issuers. All of such
issuers have been experiencing certain of these problems in varying degrees.
See "General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be obligations which
are payable from and secured by revenues derived from the ownership and
operation of facilities such as airports, bridges, turnpikes, port
authorities, convention centers and arenas. In view of this an investment in
such a Trust should be made with an understanding of the characteristics of
such issuers and the risks which such an investment may entail. The major
portion of an airport's gross operating income is generally derived from fees
received from signatory airlines pursuant to use agreements which consist of
annual payments for leases, occupancy of certain terminal space and service
fees. Airport operating income may therefore be affected by the ability of the
airlines to meet their obligations under the use agreements. The air transport
industry is experiencing significant variations in earnings and traffic, due
to increased competition, excess capacity, increased costs, deregulation,
traffic constraints and other factors, and several airlines are experiencing
severe financial difficulties. The Sponsor cannot predict what effect these
industry conditions may have on airport revenues which are dependent for
payment on the financial condition of the airlines and their usage of the
particular airport facility. Similarly, payment on Bonds related to other
facilities is dependent on revenues from the projects, such as user fees from
ports, tolls on turnpikes and bridges and rents from buildings. Therefore,
payment may be adversely affected by reduction in revenues due to such factors
as increased cost of maintenance, decreased use of a facility, lower cost of
alternative modes of transportation, scarcity of fuel and reduction or loss of
rents. See "General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be obligations which
are payable from and secured by revenues derived from the operation of
resource recovery facilities. In view of this an investment in such a Trust
should be made with an understanding of the characteristics of such issuers
and the risks which such an investment may entail. Resource recovery
facilities are designed to process solid waste, generate steam and convert
steam to electricity. Resource recovery bonds may be subject to extraordinary
optional redemption at par upon the occurrence of certain circumstances,
including but not limited to: destruction or condemnation of a project;
contracts relating to a project becoming void, unenforceable or impossible to
perform; changes in the economic availability of raw materials, operating
supplies or facilities necessary for the operation of a project or
technological or other unavoidable changes adversely affecting the operation
of a project; administrative or judicial actions which render contracts
relating to the projects void, unenforceable or impossible to perform; or
impose unreasonable burdens or excessive liabilities. The Sponsor cannot
predict the causes or likelihood of the redemption of resource recovery bonds
in such a Trust prior to the stated maturity of the Bonds. See "General" for
each Trust.

     REPLACEMENT BONDS. Because certain of the Securities in the Fund may from
time to time under certain circumstances be sold or redeemed or will mature in
accordance with their terms and because the proceeds from such events will be
distributed to Unitholders and will not be reinvested, no assurance can be
given that any Trust will retain for any length of time its present size and
composition. Neither the Sponsor nor the Trustee shall be liable in any
 <PAGE>
                           Unitholder Explanations                          11
way for any default, failure or defect in any Security. In the event of a
failure to deliver any Security that has been purchased for the Fund under a
contract, including those Securities purchased on a "when, as and if issued"
basis ("Failed Bonds"), the Sponsor is authorized under the Trust Agreement to
direct the Trustee to acquire other bonds ("Replacement Bonds") to make up the
original corpus of the Fund.
   
     The Replacement Bonds must be purchased within 20 days after delivery of
the notice of the failed contract and the purchase price (exclusive of accrued
interest) may not exceed the amount of funds reserved for the purchase of the
Failed Bonds. The Replacement Bonds (i) must be tax-exempt bonds issued by
states or territories of the United States or political subdivisions thereof
and, in the case of replacement of bonds in a State Trust, shall have the
benefit of an exemption from state taxation of interest to an extent equal to
or greater than that of the bonds they replace, (ii) must have a fixed
maturity date of at least 10 years in the case of an IM-IT or a State Trust
(other than a State Intermediate Laddered Maturity Trust) or, in the case of
an IM-IT Limited Maturity, IM-IT Intermediate, State Intermediate Laddered
Maturity or IM-IT Short Intermediate Trust, must have a fixed maturity date
within the range set forth under "Unitholder Explanations--Settlement of Bonds
in the Trusts--The Fund", (iii) must be purchased at a price that results in a
yield to maturity and in a current return, in each case as of the Date of
Deposit, at least equal to that of the Failed Bonds, (iv) shall not be "when,
as and if issued" bonds, (v) must be rated "BBB-" or better in the case of the
Insured Trusts by Standard & Poor's Corporation or "Baa" or better in the case
of the Insured Trusts by Moody's Investors Service, Inc. and (vi) with respect
to each Insured Trust, must be insured by one of the Preinsured Bond Insurers
or be eligible for (and when acquired be insured under) the insurance obtained
by such Insured Trust. Whenever a Replacement Bond has been acquired for the
Fund, the Trustee shall, within five days thereafter, notify all Unitholders
of the affected Trust of the acquisition of the Replacement Bond and shall, on
the next monthly distribution date which is more than 30 days thereafter, make
a pro rata distribution of the amount, if any, by which the cost to the
affected Trust of the Failed Bond exceeded the cost of the Replacement Bond
plus accrued interest. Once the original corpus of a Trust is acquired, the
Trustee will have no power to vary the investment of the Trust; i.e., the
Trust will have no managerial power to take advantage of market variation to
improve a Unitholder's investment.
    
     If the right of limited substitution described in the preceding paragraph
shall not be utilized to acquire Replacement Bonds in the event of a failed
contract, the Sponsor will refund the sales charge attributable to such Failed
Bonds to all Unitholders of the affected Trust and distribute the principal,
Purchased Interest and accrued interest (at the coupon rate of such Failed
Bonds to the date the Failed Bonds are removed from the Fund) attributable to
such Failed Bonds not more than 30 days after such removal or such earlier
time as the Trustee in its sole discretion deems to be in the interest of the
Unitholders. All such interest paid to a Unitholder which accrued after the
expected date of settlement for purchase of his Units will be paid by the
Sponsor and accordingly will not be treated as tax-exempt income. In the event
a Replacement Bond should not be acquired by the Fund, the Estimated Net
Annual Interest Income per Unit for the affected Trust would be reduced and
the Estimated Current Return and Estimated Long-Term Return thereon might be
lowered. In addition, Unitholders should be aware that they may not be able at
the time of receipt of such principal to reinvest such proceeds in other
securities at a yield equal to or in excess of the yield which such proceeds
were earning to Unitholders in the affected Trust.

     BOND REDEMPTIONS. Certain of the Bonds in certain of the Trusts may be
subject to redemption prior to their stated maturity date pursuant to sinking
fund provisions, call provisions or extraordinary optional or mandatory
redemption provisions or otherwise. A sinking fund is a reserve fund
accumulated over a period of time for retirement of debt. A callable debt
obligation is one which is subject to redemption or refunding prior to
maturity at the option of the issuer. A refunding is a method by which a debt
obligation is redeemed, at or before maturity, by the proceeds of a new debt
obligation. In general, call provisions are more likely to be exercised when
the offering side valuation is at a premium over par than when it is at a
discount from par. The exercise of redemption or call provisions will (except
to the extent the proceeds of the called Bonds are used to pay for Unit
redemptions) result in the distribution of principal and may result in a
reduction in the amount of subsequent interest distributions; it may also
affect the current return on Units of the Trust involved. Each Trust portfolio
contains a listing of the sinking fund and call provisions, if any, with
respect to each of the debt obligations. Extraordinary optional redemptions
and mandatory redemptions result from the happening of certain events.
Generally, events that may permit the extraordinary optional redemption of
Bonds or
 <PAGE>
12                         Unitholder Explanations
may require the mandatory redemption of Bonds include, among others: a final
determination that the interest on the Bonds is taxable; the substantial
damage or destruction by fire or other casualty of the project for which the
proceeds of the Bonds were used; an exercise by a local, state or Federal
governmental unit of its power of eminent domain to take all or substantially
all of the project for which the proceeds of the Bonds were used; changes in
the economic availability of raw materials, operating supplies or facilities
or technological or other changes which render the operation of the project
for which the proceeds of the Bonds were used uneconomic; changes in law or an
administrative or judicial decree which renders the performance of the
agreement under which the proceeds of the Bonds were made available to finance
the project impossible or which creates unreasonable burdens or which imposes
excessive liabilities, such as taxes, not imposed on the date the Bonds are
issued on the issuer of the Bonds or the user of the proceeds of the Bonds; an
administrative or judicial decree which requires the cessation of a
substantial part of the operations of the project financed with the proceeds
of the Bonds; an overestimate of the costs of the project to be financed with
the proceeds of the Bonds resulting in excess proceeds of the Bonds which may
be applied to redeem Bonds; or an underestimate of a source of funds securing
the Bonds resulting in excess funds which may be applied to redeem Bonds. The
issuer of certain Bonds in a Trust may have sold or reserved the right to
sell, upon the satisfaction of certain conditions, to third parties all or any
portion of its rights to call Bonds in accordance with the stated redemption
provisions of such Bonds. In such a case the issuer no longer has the right to
call the Bonds for redemption unless it reacquires the rights from such third
party. A third party pursuant to these rights may exercise the redemption
provisions with respect to a Bond at a time when the issuer of the Bond might
not have called a Bond for redemption had it not sold such rights. The Sponsor
is unable to predict all of the circumstances which may result in such
redemption of an issue of Bonds. See "Portfolio" for each Trust and footnote
(3) in the "Notes to Portfolios". See also the discussion of single family
mortgage and multi-family revenue bonds above for more information on the call
provisions of such bonds.

     DISTRIBUTIONS. Distributions of interest received by the Fund, pro rated
on an annual basis, will be made monthly. The first such distribution will be
in the amount indicated under 'Per Unit Information' for the applicable Trust
and will be made on the fifteenth day of the month indicated under "Initial
Distribution" therein to Unitholders of record on the first day of such month.
Distribution of funds from the Principal Account, if any, will also be made
monthly, except under certain special circumstances (see "Unitholder
Explanations--Public Offering--Distributions of Interest and Principal").

     CERTIFICATES. The Trustee is authorized to treat as the record owner of
Units that person who is registered as such owner on the books of the Trustee.
Ownership of Units of each Trust is evidenced by separate registered
certificates executed by the Trustee and the Sponsor. Certificates are
transferable by presentation and surrender to the Trustee properly endorsed or
accompanied by a written instrument or instruments of transfer. A Unitholder
must sign exactly as his name appears on the face of the certificate with the
signature guaranteed by a participant in the Securities Transfer Agents
Medallion Program ("STAMP") or such other signature guaranty program in
addition to, or in substitution for, STAMP, as may be accepted by the Trustee.
In certain instances the Trustee may require additional documents such as, but
not limited to, trust instruments, certificates of death, appointments as
executor or administrator or certificates of corporate authority. Certificates
will be issued in denominations of one Unit or any multiple thereof.

     Although no such charge is now made or contemplated, the Trustee may
require a Unitholder to pay a reasonable fee for each certificate re-issued
(other than as a result of a change in plan of distribution) or transferred
and to pay any governmental charge that may be imposed in connection with each
such transfer or interchange. Destroyed, stolen, mutilated or lost
certificates will be replaced upon delivery to the Trustee of satisfactory
indemnity, evidence of ownership and payment of expenses incurred. Mutilated
certificates must be surrendered to the Trustee for replacement.

ESTIMATED CURRENT RETURNS AND ESTIMATED LONG-TERM RETURNS
   
     As of the opening of business on the Date of Deposit (except for the
IM-IT and the Pennsylvania IM-IT Trust as of 8:00 A.M. Central Time on the
Date of Deposit), the Estimated Current Return and the Estimated Long-Term
Return
 <PAGE>
                           Unitholder Explanations                          13
were as set forth in the "Per Unit Information" for each Trust. Estimated
Current Return is calculated by dividing the estimated net annual interest
income per Unit by the Public Offering Price. The estimated net annual
interest income per Unit will vary with changes in fees and expenses of the
Trustee and the Evaluator and with the principal prepayment, redemption,
maturity, exchange or sale of Securities while the Public Offering Price will
vary with changes in the offering price of the underlying Securities and with
changes in the Purchased Interest; therefore, there is no assurance that the
present Estimated Current Return will be realized in the future. Estimated
Long-Term Return is calculated using a formula which (1) takes into
consideration, and determines and factors in the relative weightings of, the
market values, yields (which takes into account the amortization of premiums
and the accretion of discounts) and estimated retirements of all of the
Securities in a Trust and (2) takes into account the expenses and sales charge
associated with each Trust Unit. Since the market values and estimated
retirements of the Securities and the expenses of a Trust will change, there
is no assurance that the present Estimated Long-Term Return will be realized
in the future. The Estimated Current Return and Estimated Long-Term Return are
expected to differ because the calculation of Estimated Long-Term Return
reflects the estimated date and amount of principal returned while the
Estimated Current Return calculation includes only net annual interest income
and Public Offering Price.
    
     In order to acquire certain of the Securities contracted for by the
Sponsor for deposit in the Fund, it may be necessary for the Sponsor or
Trustee to pay on the settlement dates for delivery of such Securities amounts
covering accrued interest on such Securities which exceed (1) the amounts paid
by Unitholders and (2) the amounts which will be made available through cash
furnished by the Sponsor on the Date of Deposit, which amount of cash may
exceed the interest which would accrue to the First Settlement Date. The
Trustee has agreed to pay for any amounts necessary to cover any such excess
and will be reimbursed therefor, without interest, when funds become available
from interest payments on the particular Securities with respect to which such
payments may have been made. Also, since interest on any "when, as and if
issued" Securities does not begin accruing as tax-exempt interest income to
the benefit of Unitholders until their respective dates of delivery, the
Trustee may, in order to maintain (or in some cases approach) for the
Unitholders the same estimated net annual interest incomes during the first
year of the Trusts' operations as is indicated under "Per Unit Information"
for the applicable Trust, reduce its fee (and to the extent necessary pay
Trust expenses) in an amount equal to that indicated under "Per Unit
Information" for the applicable Trust.

INTEREST EARNING SCHEDULE

     CALCULATION OF ESTIMATED NET ANNUAL INTEREST INCOME. The estimated net
annual interest income is based on 360 days. To account for the estimated net
annual interest income per Unit in a Trust, it is necessary to use the
following information.
   
     The beginning interest date for each Trust is March 3, 1994. The first
record date for each Trust (April 1, 1994) is 28 days from such date. The
daily rates of estimated net annual interest income per Unit are $.14314,
$.10622, $.11727 and $.14050 for the IM-IT, IM-IT Short Intermediate, Florida
IM-IT Intermediate Laddered Maturity and Pennsylvania IM-IT Trusts,
respectively. This amounts to $4.01, $2.97, $3.28 and $3.93 for the IM-IT,
IM-IT Short Intermediate, Florida IM-IT Intermediate Laddered Maturity and
Pennsylvania IM-IT Trusts, respectively.

     Utilizing the preceding information, the following procedure illustrates
the calculation of first year estimated net annual interest income per Unit
for the Pennsylvania IM-IT Trust:

     The Pennsylvania IM-IT Trust accrues

        $3.93  to the first record date plus

        $42.20 which is 10 normal distributions at $4.22, and finally adding

        $4.45  which has accrued from February 1, 1995 until March 3, 1995
               which completes the 360 day cycle (32 days times the daily
               factor)

     Total $50.58 interest earned / $1,000.00 (Date of Deposit Public Offering
                 Price) = 5.06% Estimated Current Return as of the Date of
                 Deposit.
    
 <PAGE>
14                         Unitholder Explanations

PUBLIC OFFERING
   
     GENERAL. Units are offered at the Public Offering Price which includes
Purchased Interest. During the initial offering period the Public Offering
Price is based on the offering prices of the Securities in each Trust and
includes a sales charge of 4.9% of the Public Offering Price (excluding
Purchased Interest) (5.152% of the aggregate offering price of the Securities)
for an IM-IT or a State Trust (other than a State Intermediate Laddered
Maturity Trust), 4.3% of the Public Offering Price (excluding Purchased
Interest) (4.493% of the aggregate offering price of the Securities) for an
IM-IT Limited Maturity Trust, 3.9% of the Public Offering Price (excluding
Purchased Interest) (4.058% of the aggregate offering price of the Securities)
for an IM-IT Intermediate Trust and 3.0% of the Public Offering Price
(excluding Purchased Interest) (3.093% of the aggregate offering price of the
Securities) for an IM-IT Short Intermediate Trust or a State Intermediate
Laddered Maturity Trust. After the initial public offering period, the
secondary market Public Offering Price is based on the bid prices of the
Securities in each Trust and includes a sales charge determined in accordance
with the table set forth below, which is based upon the dollar weighted
average maturity of each Trust plus in each case Purchased Interest. For
purposes of computation, Bonds will be deemed to mature on their expressed
maturity dates unless: (a) the Bonds have been called for redemption or funds
or securities have been placed in escrow to redeem them on an earlier call
date, in which case such call date will be deemed to be the date upon which
they mature; or (b) such Bonds are subject to a "mandatory tender", in which
case such mandatory tender will be deemed to be the date upon which they
mature.
    
     The effect of this method of sales charge computation will be that
different sales charge rates will be applied to each Trust based upon the
dollar weighted average maturity of such Trust's Portfolio, in accordance with
the following schedule:

YEARS TO MATURITY         SALES CHARGE  YEARS TO MATURITY         SALES CHARGE
 1...................         1.523%    9....................         4.712%
 2...................         2.041     10...................         4.932
 3...................         2.564     11...................         4.932
 4...................         3.199     12...................         4.932
 5...................         3.842     13...................         5.374
 6...................         4.058     14...................         5.374
 7...................         4.275     15...................         5.374
 8...................         4.493     16 to 30.............         6.045

     The sales charges in the above table are expressed as a percentage of the
aggregate bid prices of the Securities in a Trust. Expressed as a percent of
the Public Offering Price (excluding Purchased Interest), the sales charge on
a Trust consisting entirely of a portfolio of Bonds with 15 years to maturity
would be 5.10%. The sales charge applicable to quantity purchases during the
initial offering period is, however, reduced on a graduated basis to any
person acquiring 100 or more Units as follows:
   
<TABLE>
<CAPTION>
                                                  DOLLAR AMOUNT OF SALES
                                                CHARGE REDUCTION PER UNIT
                                                         IM-IT,
                                                   STATE (OTHER THAN A
                                                   STATE INTERMEDIATE
                                                    LADDERED MATURITY
 AGGREGATE NUMBER OF                               TRUST) AND NATIONAL
   UNITS PURCHASED                                   QUALITY TRUSTS          OTHER TRUSTS
<S>                                                     <C>                    <C>
100-249 Units...................................        $ 4.00                 $ 4.00
250-499 Units...................................        $ 6.00                 $ 6.00
500-999 Units...................................        $ 14.00                $ 9.00
1,000 or more Units.............................        $ 19.00                $ 11.00
</TABLE>
    
Any such reduced sales charge shall be the responsibility of the selling
Underwriter, broker, dealer or agent. The Sponsor will, however, increase the
concession or agency commission for such quantity purchases. See "Public
 <PAGE>
                           Unitholder Explanations                          15
Offering--Unit Distribution". This reduced sales charge structure will apply
on all purchases by the same person from any one Underwriter or dealer of
units of Van Kampen Merritt-sponsored unit investment trusts which are being
offered in the initial offering period (a) on any one day (the "Initial
Purchase Date") or (b) on any day subsequent to the Initial Purchase Date, if
(1) the units purchased are of a unit investment trust purchased on the
Initial Purchase Date, and (2) the person purchasing the units purchased a
sufficient amount of units on the Initial Purchase Date to qualify for a
reduced sales charge on such date. To determine the applicable sales charge
for units purchased in accordance with (b) above, it is necessary to
accumulate all purchases made on the Initial Purchase Date and all purchases
made in accordance with (b) above. Units purchased in the name of the spouse
of a purchaser or in the name of a child of such purchaser under 21 years of
age will be deemed for the purposes of calculating the applicable sales charge
to be additional purchases by the purchaser. The reduced sales charges will
also be applicable to a trustee or other fiduciary purchasing securities for
one or more trust estate or fiduciary accounts. Employees of Van Kampen
Merritt Inc. and its subsidiaries may purchase Units of the Trust at the
current Public Offering Price less the underwriting commission during the
initial offering period, and less the dealer's concession for secondary market
transactions. Registered representatives of selling Underwriters may purchase
Units of the Fund at the current Public Offering Price less the underwriting
commission during the initial offering period, and less the dealer's
concession for secondary market transactions. Registered representatives of
selling brokers, dealers, or agents may purchase Units of the Fund at the
current Public Offering Price less the dealer's concession during the initial
offering period and for secondary market transactions.

     OFFERING PRICE. Public Offering Price of the Units will vary from the
amounts stated under "Summary of Essential Financial Information" in
accordance with fluctuations in the prices of the underlying Securities in
each Trust.
   
     As indicated above, the price of the Units as of the date the Securities
were deposited in each Trust was determined by adding to the aggregate
offering price of the Securities of a Trust an amount equal to the applicable
sales charge expressed as a percentage of the aggregate offering price of the
Securities plus Purchased Interest and dividing the sum so obtained by the
number of Units outstanding. This computation produced a gross underwriting
commission equal to such sales charge expressed as a percentage of the Public
Offering Price (excluding Purchased Interest). Such price determination as of
the opening of business on the Date of Deposit (except for the IM-IT and the
Pennsylvania IM-IT Trust as of 8:00 A.M. Central Time on the Date of Deposit)
was made on the basis of an evaluation of the Securities in each Trust
prepared by Interactive Data Services, Inc., a firm regularly engaged in the
business of evaluating, quoting or appraising comparable securities. After the
opening of business on the Date of Deposit (except for the IM-IT and the
Pennsylvania IM-IT Trust as of 8:00 A.M. Central Time on the Date of Deposit)
and during the period of initial offering, the Evaluator will appraise or
cause to be appraised daily the value of the underlying Securities of each
Trust as of 4:00 P.M. Eastern time on days the New York Stock Exchange is open
for business and will adjust the Public Offering Price of the Units
commensurate with such appraisal. Such Public Offering Price will be effective
for all orders received at or prior to 4:00 P.M. Eastern time on each such
day. Orders received by the Trustee, Sponsor or any Underwriter for purchases,
sales or redemptions after that time, or on a day when the New York Stock
Exchange is closed, will be held until the next determination of price. For
secondary market sales the Public Offering Price per Unit will be equal to the
aggregate bid price of the Securities in the Trust plus an amount equal to the
applicable secondary market sales charge expressed as a percentage of the
aggregate bid price of the Securities plus Purchased Interest and dividing the
sum so attained by the number of Units then outstanding. This computation
produces a gross commission equal to such sales charge expressed as a
percentage of the Public Offering Price (excluding Purchased Interest). For
secondary market purposes such appraisal and adjustment with respect to a
Trust will be made by the Evaluator as of 4:00 P.M. Eastern time on days in
which the New York Stock Exchange is open for each day on which any Unit of
such Trust is tendered for redemption, and it shall determine the aggregate
value of any Trust as of 4:00 P.M. Eastern time on such other days as may be
necessary.
    
     The aggregate price of the Securities in each Trust has been and will be
determined on the basis of bid prices or offering prices, as is appropriate,
(a) on the basis of current market prices for the Securities obtained from
dealers or brokers who customarily deal in bonds comparable to those held by
the Fund; (b) if such prices are not available for any particular Securities,
on the basis of current market prices for comparable bonds; (c) by causing the
value of the
 <PAGE>
16                         Unitholder Explanations
Securities to be determined by others engaged in the practice of evaluation,
quoting or appraising comparable bonds; or (d) by any combination of the
above. Market prices of the Securities will generally fluctuate with changes
in market interest rates. Unless Bonds are in default in payment of principal
or interest or in significant risk of such default, the Evaluator will not
attribute any value to the insurance obtained by an Insured Trust, if any.

     The Evaluator will consider in its evaluation of Bonds which are in
default in payment of principal or interest or, in the Sponsor's opinion, in
significant risk of such default (the "Defaulted Bonds") the value of the
insurance guaranteeing interest and principal payments. The value of the
insurance will be equal to the difference between (i) the market value of
Defaulted Bonds assuming the exercise of the right to obtain Permanent
Insurance (less the insurance premiums and related expenses attributable to
the purchase of Permanent Insurance) and (ii) the market value of such
Defaulted Bonds not covered by Permanent Insurance. In addition, the Evaluator
will consider the ability of the affected Portfolio Insurer to meet its
commitments under any Trust insurance policy, including the commitments to
issue Permanent Insurance. It is the position of the Sponsor that this is a
fair method of valuing the Bonds and the insurance obtained by an Insured
Trust and reflects a proper valuation method in accordance with the provisions
of the Investment Company Act of 1940.

     No value has been ascribed to insurance obtained by an Insured Trust, if
any, as of the date of this Prospectus.

     The initial or primary Public Offering Price of the Units is equal to the
offering price per Unit of the underlying Securities in each Trust plus the
applicable sales charge plus Purchased Interest and interest accrued but
unpaid from the First Settlement Date to the date of settlement. The secondary
market Public Offering Price is equal to the bid price per Unit of the
Securities in each Trust plus the applicable sales charge plus Purchased
Interest and accrued interest. The offering price of Securities in each Trust
may be expected to average approximately 0.5%-1% more than the bid price of
such Securities. On the Date of Deposit, the offering side evaluations of the
Securities in the Trusts were higher than the bid side evaluations of such
Securities by the respective amounts indicated under footnote (5) in "Notes to
Portfolios".

     Although payment is normally made five business days following the order
for purchase, payment may be made prior thereto. A person will become the
owner of Units on the date of settlement provided payment has been received.
Cash, if any, made available to the Sponsor prior to the date of settlement
for the purchase of Units may be used in the Sponsor's business and may be
deemed to be a benefit to the Sponsor, subject to the limitations of the
Securities Exchange Act of 1934. Delivery of certificates representing Units
so ordered will be made five business days following such order or shortly
thereafter. See "Redemption of Units" below for information regarding the
ability to redeem Units ordered for purchase.

     MARKET FOR UNITS. During the initial public offering period, the Sponsor
and/or certain of the Underwriters intend to offer to purchase Units at a
price equivalent to the Public Offering Price which is based upon the
aggregate offering price per Unit of the underlying Securities in each Trust
and the amount of Purchased Interest for each Trust plus accrued interest to
the date of settlement less the related sales commission. Afterward, although
they are not obligated to do so, the Sponsor intends to, and certain of the
other Underwriters may, maintain a market for the Units offered hereby and to
offer continuously to purchase such Units at prices, subject to change at any
time, based upon the aggregate bid prices of the Securities in the portfolio
of each Trust plus Purchased Interest plus interest accrued to the date of
settlement and plus any principal cash on hand, less any amounts representing
taxes or other governmental charges payable out of the Trust and less any
accrued Trust expenses. If the supply of Units exceeds demand or if some other
business reason warrants it, the Sponsor and/or the Underwriters may either
discontinue all purchases of Units or discontinue purchases of Units at such
prices. In the event that a market is not maintained for the Units and the
Unitholder cannot find another purchaser, a Unitholder of any Trust desiring
to dispose of his Units may be able to dispose of such Units only by tendering
them to the Trustee for redemption at the Redemption Price, which is based
upon the aggregate bid price of the Securities in the portfolio of such Trust
plus Purchased Interest and any accrued interest. The aggregate bid prices of
the underlying Securities in a Trust are expected to be less than the related
aggregate offering prices. See "Redemption of Units" below. A Unitholder who
wishes to dispose of his Units should inquire of his broker as to current
market prices in order to determine whether there is in existence any price in
excess of the Redemption Price and, if so, the amount thereof.
 <PAGE>
                           Unitholder Explanations                          17

     DISTRIBUTIONS OF INTEREST AND PRINCIPAL. Interest received by the Fund,
including that part of the proceeds of any disposition of Securities which
represents Purchased Interest and/or accrued interest, is credited by the
Trustee to the Interest Account for the appropriate Trust. Other receipts are
credited to the Principal Account for the appropriate Trust. Interest received
by the Fund after deduction of amounts sufficient to reimburse the Trustee,
without interest, for any amounts advanced and paid to the Sponsor as the
Unitholder of record as of the First Settlement Date (see "Public
Offering--Offering Price" above) will be distributed on or shortly after the
fifteenth day of each month on a pro rata basis to Unitholders of record of a
Trust as of the preceding record date who are entitled to distributions at
that time. All distributions will be net of applicable expenses. The pro rata
share of cash in the Principal Account of a Trust will be computed as of the
date set forth under "Per Unit Information" for the applicable Trust, and
thereafter as of the record date, and distributions to the Unitholders as of
such record date will be made on or shortly after the fifteenth day of such
month. Proceeds received from the disposition of any of the Securities after
such record date and prior to the following distribution date will be held in
the Principal Account and not distributed until the next distribution date.
The Trustee is not required to pay interest on funds held in any Principal or
Interest Account (but may itself earn interest thereon and therefore benefits
from the use of such funds) nor to make a distribution from the Principal
Account unless the amount available for distribution therein shall equal at
least $1.00 per Unit.

     The distribution to the Unitholders of a Trust as of each record date
after the First Settlement Date will be made on the following distribution
date or shortly thereafter and shall consist of an amount substantially equal
to such portion of the Unitholder's pro rata share of the estimated net Annual
interest Income in the Interest Account of such Trust after deducting
estimated expenses. Because interest payments are not received by the Fund at
a constant rate throughout the year, such interest distribution may be more or
less than the amount credited to such Interest Account as of the record date.
For the purpose of minimizing fluctuations in the distributions from an
Interest Account, the Trustee is authorized to advance such amounts as may be
necessary to provide interest distributions of approximately equal amounts.
The Trustee shall be reimbursed, without interest, for any such advances from
funds in the applicable Interest Account on the ensuing record date. Persons
who purchase Units between a record date and a distribution date will receive
their first distribution on the second distribution date after the purchase.

     As of the first day of each month, the Trustee will deduct from the
Interest Account and, to the extent funds are not sufficient therein, from the
Principal Account, amounts necessary to pay the expenses of the Fund (as
determined on the basis set forth under "Trust Administration--Fund
Administration and Expenses"). The Trustee also may withdraw from said
Accounts such amounts, if any, as it deems necessary to establish a reserve
for any governmental charges payable out of the Fund. Amounts so withdrawn
shall not be considered a part of the Fund's assets until such time as the
Trustee shall return all or any part of such amounts to the appropriate
Accounts. In addition, the Trustee may withdraw from the Interest and
Principal Accounts such amounts as may be necessary to cover purchases of
Replacement Bonds and redemptions of Units by the Trustee.

     REINVESTMENT OPTION. Unitholders of all unit investment trusts sponsored
by Van Kampen Merritt Inc. (except Unitholders of a New York IM-IT Trust or a
New York IM-IT Intermediate Laddered Maturity Trust), may elect to have each
distribution of interest income, capital gains and/or principal on their Units
automatically reinvested in shares of any of the open ended mutual funds
(except for B shares) listed under "Trust Administration--Sponsor" which are
registered in the Unitholder's state of residence. New York IM-IT Trust and
New York IM-IT Intermediate Laddered Maturity Trust Unitholders, other than
those residing in the Commonwealth of Massachusetts, may elect to have each
distribution of interest income, capital gains and/or principal on their Units
automatically reinvested in shares of First Investors New York Insured Tax
Free Fund, Inc., a fund which invests primarily in securities exempt from
federal and New York state and city income tax. Such mutual funds are
hereinafter collectively referred to as the "Reinvestment Funds".

     Each Reinvestment Fund has investment objectives which differ in certain
respects from those of the Trusts. The prospectus relating to each
Reinvestment Fund describes the investment policies of such fund and sets
forth the procedures to follow to commence reinvestment. A Unitholder may
obtain a prospectus for the respective Reinvestment Funds from Van Kampen
Merritt Inc. at One Parkview Plaza, Oakbrook Terrace, Illinois 60181. Texas
 <PAGE>
18                         Unitholder Explanations
residents who desire to reinvest may request that a broker-dealer registered
in Texas send the prospectus relating to the respective fund.

     After becoming a participant in a reinvestment plan, each distribution of
interest income, capital gains and/or principal on the participant's Units
will, on the applicable distribution date, automatically be applied, as
directed by such person, as of such distribution date by the Trustee to
purchase shares (or fractions thereof) of the applicable Reinvestment Fund at
a net asset value as computed as of the close of trading on the New York Stock
Exchange on such date, plus a sales charge of $1.00 per $100 of reinvestment
except if the participant selects the First Investors New York Insured Tax
Free Fund, Inc., in which case the sales charge will be $1.50 per $100 of
reinvestment, or except if the participant selects the Van Kampen Merritt
Money Market Fund or the Van Kampen Merritt Tax Free Money Fund in which case
no sales charge applies. A minimum of one-half of such sales charge would be
paid to Van Kampen Merritt Inc. for all Reinvestment Funds except First
Investors New York Insured Tax Free Fund, Inc., in which case such sales
charge would be paid to First Investors Management Company, Inc.

     Confirmations of all reinvestments by a Unitholder into a Reinvestment
Fund will be mailed to the Unitholder by such Reinvestment Fund.

     A participant may at any time prior to five days preceding the next
succeeding distribution date, by so notifying the Trustee in writing, elect to
terminate his or her reinvestment plan and receive future distributions of his
or her Units in cash. There will be no charge or other penalty for such
termination. Each Reinvestment Fund, its sponsor and investment adviser shall
have the right to terminate at any time the reinvestment plan relating to such
fund.

     REDEMPTION OF UNITS. A Unitholder may redeem all or a portion of his
Units by tender to the Trustee, at its Unit Investment Trust Division, 101
Barclay Street, 20th Floor, New York, New York 10286, of the certificates
representing the Units to be redeemed, duly endorsed or accompanied by proper
instruments of transfer with signature guaranteed (or by providing
satisfactory indemnity, as in connection with lost, stolen or destroyed
certificates) and by payment of applicable governmental charges, if any. Thus,
redemption of Units cannot be effected until certificates representing such
Units have been delivered to the person seeking redemption or satisfactory
indemnity provided. No redemption fee will be charged. On the seventh calendar
day following such tender, or if the seventh calendar day is not a business
day, on the first business day prior thereto, the Unitholder will be entitled
to receive in cash an amount for each Unit equal to the Redemption Price per
Unit next computed after receipt by the Trustee of such tender of Units. The
"date of tender" is deemed to be the date on which Units are received by the
Trustee, except that as regards Units received after 4:00 P.M. Eastern time on
days of trading on the New York Stock Exchange, the date of tender is the next
day on which such Exchange is open for trading and such Units will be deemed
to have been tendered to the Trustee on such day for redemption at the
Redemption Price computed on that day.

     Under regulations issued by the Internal Revenue Service, the Trustee
will be required to withhold a specified percentage of the principal amount of
a Unit redemption if the Trustee has not been furnished the redeeming
Unitholder's tax identification number in the manner required by such
regulations. Any amount so withheld is transmitted to the Internal Revenue
Service and may be recovered by the Unitholder only when filing a return.
Under normal circumstances the Trustee obtains the Unitholder's tax
identification number from the selling broker. However, at any time a
Unitholder elects to tender Units for redemption, such Unitholder should
provide a tax identification number to the Trustee in order to avoid this
possible "back-up withholding" in the event the Trustee has not been
previously provided such number.

     Purchased Interest and accrued interest paid on redemption shall be
withdrawn from the Interest Account of such Trust or, if the balance therein
is insufficient, from the Principal Account of such Trust. All other amounts
will be withdrawn from the Principal Account of such Trust. The Trustee is
empowered to sell underlying Securities of a Trust in order to make funds
available for redemption. Units so redeemed shall be cancelled.

     The Redemption Price per Unit (as well as the secondary market Public
Offering Price) will be determined on the basis of the bid price of the
Securities in each Trust, while the initial and primary Public Offering Price
of Units will be determined on the basis of the offering price of the
Securities in each Trust, as of 4:00 P.M. Eastern time on days of trading on
the New York Stock Exchange on the date any such determination is made. On the
Date of Deposit the
 <PAGE>
                           Unitholder Explanations                          19
Public Offering Price per Unit (which is based on the offering prices of the
Bonds and Purchased Interest in each Trust and includes the sales charge)
exceeded the value at which Units could have been redeemed (based upon the
current bid prices of the Securities and Purchased Interest in such Trust) by
the amount shown under "Summary of Essential Financial Information". While the
Trustee has the power to determine the Redemption Price per Unit when Units
are tendered for redemption, such authority has been delegated to the
Evaluator which determines the price per Unit on a daily basis. The Redemption
Price per Unit is the pro rata share of each Unit in each Trust on the basis
of (i) the cash on hand in such Trust or moneys in the process of being
collected, (ii) the value of the Securities in such Trust based on the bid
prices of the Securities therein, except for cases in which the value of
insurance has been included, (iii) Purchased Interest for each Trust and (iv)
interest accrued thereon, less (a) amounts representing taxes or other
governmental charges payable out of such Trust and (b) the accrued expenses of
such Trust. The Evaluator may determine the value of the Securities in each
Trust by employing any of the methods set forth in "Public Offering--Offering
Price". In determining the Redemption Price per Unit no value will be assigned
to the portfolio insurance maintained on the Bonds in an Insured Trust unless
such Bonds are in default in payment of principal or interest or in
significant risk of such default. For a description of the situations in which
the Evaluator may value the insurance obtained by the Insured Trusts, see
"Public Offering--Offering Price" above.

     The price at which Units may be redeemed could be less than the price
paid by the Unitholder. As stated above, the Trustee may sell Securities to
cover redemptions. When Securities are sold, the size and diversity of the
affected Trust will be reduced. Such sales may be required at a time when
Securities would not otherwise be sold and might result in lower prices than
might otherwise be realized.

     The right of redemption may be suspended and payment postponed for any
period during which the New York Stock Exchange is closed, other than for
customary weekend and holiday closings, or during which the Securities and
Exchange Commission determines that trading on that Exchange is restricted or
an emergency exists, as a result of which disposal or evaluation of the
Securities in the Trusts is not reasonably practicable, or for such other
periods as the Securities and Exchange Commission may by order permit. Under
certain extreme circumstances the Sponsor may apply to the Securities and
Exchange Commission for an order permitting a full or partial suspension of
the right of Unitholders to redeem their Units.

     REPORTS PROVIDED. The Trustee shall furnish Unitholders of a Trust in
connection with each distribution a statement of the amount of interest and
the amount of other receipts (received since the preceding distribution), if
any, being distributed expressed in each case as a dollar amount representing
the pro rata share of each Unit of a Trust outstanding. For as long as the
Trustee deems it to be in the best interests of the Unitholders, the accounts
of each Trust shall be audited, not less frequently than annually, by
independent certified public accountants and the report of such accountants
shall be furnished by the Trustee to Unitholders of such Trusts upon request.
Within a reasonable period of time after the end of each calendar year, the
Trustee shall furnish to each person who at any time during the calendar year
was a registered Unitholder of a Trust a statement (i) as to the Interest
Account: interest received (including amounts representing interest received
upon any disposition of Securities) and the percentage of such interest by
states in which the issuers of the Securities are located, the amount of
Purchased Interest, deductions for applicable taxes and for fees and expenses
of such Trust, for purchases of Replacement Bonds and for redemptions of
Units, if any, and the balance remaining after such distributions and
deductions, expressed in each case both as a total dollar amount and as a
dollar amount representing the pro rata share of each Unit outstanding on the
last business day of such calendar year; (ii) as to the Principal Account: the
dates of disposition of any Securities and the net proceeds received therefrom
(excluding any portion representing accrued interest), the amount paid for
purchases of Replacement Bonds and for redemptions of Units, if any,
deductions for payment of applicable taxes and fees and expenses of the
Trustee, the amount of "when issued" interest treated as a return of capital,
if any, and the balance remaining after such distributions and deductions
expressed both as a total dollar amount and as a dollar amount representing
the pro rata share of each Unit outstanding on the last business day of such
calendar year; (iii) a list of the Securities held and the number of Units
outstanding on the last business day of such calendar year; (iv) the
Redemption Price per Unit based upon the last computation thereof made during
such calendar year; and (v) amounts
 <PAGE>
20                         Unitholder Explanations
actually distributed during such calendar year from the Interest and Principal
Accounts, separately stated, expressed both as total dollar amounts and as
dollar amounts representing the pro rata share of each Unit outstanding.

     In order to comply with Federal and state tax reporting requirements,
Unitholders will be furnished, upon request to the Trustee, evaluations of the
Securities in a Trust furnished to it by the Evaluator.

INSURANCE ON THE BONDS IN THE INSURED TRUSTS

     Insurance has been obtained by each Insured Trust or by the issuer of
such Bonds, or by a prior owner of such Bonds, or by the Sponsor prior to the
deposit of such Bonds in a Trust guaranteeing prompt payment of interest and
principal, when due, in respect of the Bonds in such Trust. See "Unitholder
Explanations--Settlement of Bonds in the Trusts--Objectives and Securities
Selection". An insurance policy obtained by an Insured Trust, if any, is non-
cancellable and will continue in force so long as such Trust is in existence,
the respective Portfolio Insurer referred to below is still in business and
the Bonds described in such policy continue to be held by such Trust (see
"Portfolio" for the respective Insured Trust). Any portfolio insurance premium
for an Insured Trust, which is an obligation of such Trust, is paid by each
Trust on a monthly basis. Non-payment of premiums on a policy obtained by an
Insured Trust will not result in the cancellation of insurance but will force
the insurer to take action against the Trustee to recover premium payments due
it. The Trustee in turn will be entitled to recover such payments from such
Trust. Premium rates for each issue of Bonds protected by a policy obtained by
an Insured Trust, if any, are fixed for the life of the Trust. The premium for
any Preinsured Bond insurance has been paid by such issuer, by a prior owner
of such Bonds or the Sponsor and any such policy or policies are
non-cancellable and will continue in force so long as the Bonds so insured are
outstanding and the respective Preinsured Bond Insurer remains in business. If
the provider of an original issuance insurance policy is unable to meet its
obligations under such policy or if the rating assigned to the claims-paying
ability of any such insurer deteriorates, the Portfolio Insurers have no
obligation to insure any issue adversely affected by either of the above
described events.

     The aforementioned portfolio insurance obtained by an Insured Trust, if
any, guarantees the timely payment of principal and interest on the Bonds as
they fall due. For the purposes of insurance obtained by an Insured Trust,
"when due" generally means the stated maturity date for the payment of
principal and interest. However, in the event (a) an issuer of a Bond defaults
in the payment of principal or interest on such Bond, (b) such issuer enters
into a bankruptcy proceeding or (c) the maturity of such Bond is accelerated,
the affected Portfolio Insurer has the option, in its sole discretion, after
receiving notice of the earliest to occur of such a default, bankruptcy
proceeding or acceleration to pay the outstanding principal amount of such
Bond plus accrued interest to the date of such payment and thereby retire the
Bond from the affected Trust prior to such Bond's stated maturity date. The
insurance does not guarantee the market value of the Bonds or the value of the
Units. Insurance obtained by an Insured Trust, if any, is only effective as to
Bonds owned by and held in such Trust. In the event of a sale of any such Bond
by the Trustee, such insurance terminates as to such Bond on the date of sale.

     Pursuant to an irrevocable commitment of the Portfolio Insurers, the
Trustee, upon the sale of a Bond covered under a portfolio insurance policy
obtained by an Insured Trust, has the right to obtain permanent insurance with
respect to such Bond (i.e., insurance to maturity of the Bonds regardless of
the identity of the holder thereof) (the "Permanent Insurance") upon the
payment of a single predetermined insurance premium and any expenses related
thereto from the proceeds of the sale of such Bond. Accordingly, any Bond in
an Insured Trust is eligible to be sold on an insured basis. It is expected
that the Trustee would exercise the right to obtain Permanent Insurance only
if upon such exercise the affected Trust would receive net proceeds (sale of
Bond proceeds less the insurance premium and related expenses attributable to
the Permanent Insurance) from such sale in excess of the sale proceeds if such
Bonds were sold on an uninsured basis. The insurance premium with respect to
each Bond eligible for Permanent Insurance would be determined based upon the
insurability of each Bond as of the Date of Deposit and would not be increased
or decreased for any change in the creditworthiness of each Bond.

     The Sponsor believes that the Permanent Insurance option provides an
advantage to an Insured Trust in that each Bond insured by a Trust insurance
policy may be sold out of the affected Trust with the benefits of the
insurance
 <PAGE>
                           Unitholder Explanations                          21
attaching thereto. Thus, the value of the insurance, if any, at the time of
sale, can be realized in the market value of the Bond so sold (which is not
the case in connection with any value attributable to an Insured Trust's
portfolio insurance). See "Public Offering--Offering Price". Because any such
insurance value may be realized in the market value of the Bond upon the sale
thereof upon exercise of the Permanent Insurance option, the Sponsor
anticipates that (a) in the event an Insured Trust were to be comprised of a
substantial percentage of Bonds in default or significant risk of default, it
is much less likely that such Trust would need at some point in time to seek a
suspension of redemptions of Units than if such Trust were to have no such
option (see "Public Offering--Redemption of Units") and (b) at the time of
termination of an Insured Trust, if such Trust were holding defaulted Bonds or
Bonds in significant risk of default such Trust would not need to hold such
Bonds until their respective maturities in order to realize the benefits of
such Trust's portfolio insurance (see "Trust Administration--Amendment or
Termination").

     Except as indicated below, insurance obtained by an Insured Trust has no
effect on the price or redemption value of Units. It is the present intention
of the Evaluator to attribute a value for such insurance (including the right
to obtain Permanent Insurance) for the purpose of computing the price or
redemption value of Units if the Bonds covered by such insurance are in
default in payment of principal or interest or in significant risk of such
default. The value of the insurance will be the difference between (i) the
market value of a Bond which is in default in payment of principal or interest
or in significant risk of such default assuming the exercise of the right to
obtain Permanent Insurance (less the insurance premium and related expenses
attributable to the purchase of Permanent Insurance) and (ii) the market value
of such Bonds not covered by Permanent Insurance. See "Public
Offering--Offering Price". It is also the present intention of the Trustee not
to sell such Bonds to effect redemptions or for any other reason but rather to
retain them in the portfolio because value attributable to the insurance
cannot be realized upon sale. See "Public Offering-- Offering Price" herein
for a more complete description of an Insured Trust's method of valuing
defaulted Bonds and Bonds which have a significant risk of default. Insurance
obtained by the issuer of a Bond is effective so long as such Bond is
outstanding. Therefore, any such insurance may be considered to represent an
element of market value in regard to the Bonds thus insured, but the exact
effect, if any, of this insurance on such market value cannot be predicted.

     The portfolio insurance policy or policies obtained by an Insured Trust,
if any, with respect to the Bonds in such Trust were issued by one or more of
the Portfolio Insurers. Any other Preinsured Bond insurance policy (or
commitment therefor) was issued by one of the Preinsured Bond Insurers. See
"Unitholder Explanations--Settlement of Bonds in the Trusts--Objectives and
Securities Selection".

     AMBAC Indemnity Corporation ("AMBAC Indemnity") is a Wisconsin-domiciled
stock insurance corporation regulated by the Office of the Commissioner of
Insurance of the State of Wisconsin and licensed to do business in 50 states,
the District of Columbia and the Commonwealth of Puerto Rico, with admitted
assets of approximately $1,936,000,000 (unaudited) and statutory capital of
approximately $1,096,000,000 (unaudited) as of September 30, 1993. Statutory
capital consists of AMBAC Indemnity's policyholders' surplus and statutory
contingency reserve. AMBAC Indemnity is a wholly owned subsidiary of AMBAC
Inc., a 100% publicly-held company. Moody's Investors Service, Inc. and
Standard & Poor's Corporation have both assigned a triple-A claims-paying
ability rating to AMBAC Indemnity.

     Copies of its financial statements prepared in accordance with statutory
accounting standards are available from AMBAC Indemnity. The address of AMBAC
Indemnity's administrative offices and its telephone number are One State
Street Plaza, 17th Floor, New York, New York, 10004 and (212) 668-0340.

     AMBAC Indemnity has entered into quota share reinsurance agreements under
which a percentage of the insurance underwritten pursuant to certain municipal
bond insurance programs of AMBAC Indemnity has been and will be assumed by a
number of foreign and domestic unaffiliated reinsurers.

     Municipal Bond Investors Assurance Corporation ("MBIA") is the principal
operating subsidiary of MBIA Inc., a New York Stock Exchange listed company.
MBIA Inc. is not obligated to pay the debts of or claims against MBIA. MBIA is
a limited liability corporation rather than a several liability association.
MBIA is domiciled in the State of New York and licensed to do business in all
fifty states, the District of Columbia and the Commonwealth of Puerto Rico. As
of December 31, 1992 MBIA had admitted assets of $2.6 billion (audited), total
liabilities of $1.7 billion (audited), and
 <PAGE>
22                         Unitholder Explanations
total capital and surplus of $896 million (audited) determined in accordance
with statutory accounting practices prescribed or permitted by insurance
regulatory authorities. As of September 30, 1993, MBIA had admitted assets of
$3.0 billion (unaudited), total liabilities of $2.0 billion (uaudited), and
total capital and surplus of $951 million (unaudited) determined in accordance
with statutory accounting practices prescribed or permitted by insurance
regulatory authorities. Copies of MBIA's year end financial statements
prepared in accordance with statutory accounting practices are available from
MBIA. The address of MBIA is 113 King Street, Armonk, New York 10504.

     Effective December 31, 1989, MBIA Inc. acquired Bond Investors Group,
Inc. On January 5, 1990, MBIA acquired all of the outstanding stock of Bond
Investors Group, Inc., the parent of Bond Investors Guaranty Insurance Company
(BIG), now known as MBIA Insurance Corp. of Illinois. Through a reinsurance
agreement, BIG has ceded all of its net insured risks, as well as its unearned
premium and contingency reserves, to MBIA and MBIA has reinsured BIG's net
outstanding exposure.

     Moody's Investors Service, Inc. rates all bond issues insured by MBIA
"Aaa" and short term loans "MIG 1," both designated to be of the highest
quality.

     Standard & Poor's Corporation rates all new issues insured by MBIA "AAA"
Prime Grade.

     The Moody's Investors Service, Inc. rating of MBIA should be evaluated
independently of the Standard & Poor's Corporation rating of MBIA. No
application has been made to any other rating agency in order to obtain
additional ratings on the Bonds. The ratings reflect the respective rating
agency's current assessment of the creditworthiness of MBIA and its ability to
pay claims on its policies of insurance. Any further explanation as to the
significance of the above ratings may be obtained only from the applicable
rating agency.

     The above ratings are not recommendations to buy, sell or hold the Bonds,
and such ratings may be subject to revision or withdrawal at any time by the
rating agencies. Any downward revision or withdrawal of either or both ratings
may have an adverse effect on the market price of the Bonds.

     Financial Guaranty Insurance Company ("Financial Guaranty" or "FGIC") is
a wholly-owned subsidiary of FGIC Corporation (the "Corporation"), a Delaware
holding company. The Corporation is a wholly-owned subsidiary of General
Electric Capital Corporation ("GECC"). Neither the Corporation nor GECC is
obligated to pay the debts of or the claims against Financial Guaranty.
Financial Guaranty is domiciled in the State of New York and is subject to
regulation by the State of New York Insurance Department. As of December 31,
1993, the total capital and surplus of Financial Guaranty was approximately
$777,000,000. Copies of Financial Guaranty's financial statements, prepared on
the basis of statutory accounting principles, and the Corporation's financial
statements, prepared on the basis of generally accepted accounting principles,
may be obtained by writing to Financial Guaranty at 115 Broadway, New York,
New York 10006, Attention: Communications Department, telephone number: (212)
312-3000 or to the New York State Insurance Department at 160 West Broadway,
18th Floor, New York, New York 10013, Attention: Property Companies Bureau,
telephone number: (212) 621-0389.

     In addition, Financial Guaranty Insurance Company is currently licensed
to write insurance in all 50 states and the District of Columbia.

     Financial Security Assurance, Inc. ("Financial Security" or "FSA") is a
monoline insurance company incorporated on March 16, 1984 under the laws of
the State of New York. The operations of Financial Security commenced on July
25, 1985, and Financial Security received its New York State insurance license
on September 23, 1985. Financial Security and its two wholly owned
subsidiaries are licensed to engage in the financial guaranty insurance
business in 49 states, the District of Columbia and Puerto Rico.

     Financial Security and its subsidiaries are engaged exclusively in the
business of writing financial guaranty insurance, principally in respect of
asset-backed and other collateralized securities offered in domestic and
foreign markets. Financial Security and its subsidiaries also write financial
guaranty insurance in respect of municipal and other obligations and reinsure
financial guaranty insurance policies written by other leading insurance
companies. In general, financial guaranty insurance consists of the issuance
of a guaranty of scheduled payments of an issuer's securities, thereby
enhancing the credit rating of those securities, in consideration for payment
of a premium to the insurer.
 <PAGE>
                           Unitholder Explanations                          23

     Financial Security is approximately 91.6% owned by U S WEST, Inc. and
8.4% owned by The Tokio Marine and Fire Insurance Co., Ltd. ("Tokio Marine").
Neither U S WEST, Inc. nor Tokio Marine is obligated to pay the debts of or
the claims against Financial Security. Financial Security is domiciled in the
State of New York and is subject to regulation by the State of New York
Insurance Department. As of March 31, 1993, the total policyholders' surplus
and contingency reserves and the total unearned premium reserve, respectively,
of Financial Security and its consolidated subsidiaries were, in accordance
with generally accepted accounting principles, approximately $479,110,000
(unaudited) and $220,078,000 (unaudited), and the total shareholders' equity
and the total unearned premium reserve, respectively, of Financial Security
and its consolidated subsidiaries were, in accordance with generally accepted
accounting principles, approximately $628,119,000 (unaudited) and $202,493,000
(unaudited). Copies of Financial Security's financial statements may be
obtained by writing to Financial Security at 350 Park Avenue, New York, New
York, 10022, Attention: Communications Department. Its telephone number is
(212) 826-0100.

     Pursuant to an intercompany agreement, liabilities on financial guaranty
insurance written by Financial Security or either of its subsidiaries are
reinsured among such companies on an agreed-upon percentage substantially
proportional to their respective capital, surplus and reserves, subject to
applicable statutory risk limitations. In addition, Financial Security
reinsures a portion of its liabilities under certain of its financial guaranty
insurance policies with unaffiliated reinsurers under various quota share
treaties and on a transaction-by-transaction basis. Such reinsurance is
utilized by Financial Security as a risk management device and to comply with
certain statutory and rating agency requirements; it does not alter or limit
Financial Security's obligations under any financial guaranty insurance
policy.

     Financial Security's claims-paying ability is rated "Aaa" by Moody's
Investors Service, Inc., and "AAA" by Standard & Poor's Corporation, Nippon
Investors Service Inc., Duff & Phelps Inc. and Australian Ratings Pty. Ltd.
Such ratings reflect only the views of the respective rating agencies, are not
recommendations to buy, sell or hold securities and are subject to revision or
withdrawal at any time by such rating agencies.

     Capital Guaranty Insurance Company ("Capital Guaranty") was incorporated
in Maryland on June 25, 1986, and is a wholly-owned subsidiary of Capital
Guaranty Corporation, a Maryland insurance holding company.

     Capital Guaranty Corporation is owned by the following investors:
Constellation Investments, Inc., an affiliate of Baltimore Gas and Electric;
Fleet/Norstar Financial Group, Inc.; Safeco Corporation; Sibag Finance
Corporation, an affiliate of Siemens A.G.; and United States Fidelity and
Guaranty Company and management.

     Capital Guaranty, headquartered in San Francisco, is a monoline financial
guaranty insurer engaged in the underwriting and development of financial
guaranty insurance. Capital Guaranty insures general obligation, tax supported
and revenue bonds structured as tax-exempt and taxable securities as well as
selectively insures taxable corporate/asset backed securities. Standard &
Poor's Corporation rates the claims paying ability of Capital Guaranty "AAA."

     Capital Guaranty's insured portfolio currently includes over $9 billion
in total principal and interest insured. As of September 30, 1993, the total
policyholders' surplus of Capital Guaranty was approximately $181,383,432
(unaudited), and the total admitted assets were approximately $270,021,126
(unaudited) as reported to the Insurance Department of the State of Maryland.
Financial statements for Capital Guaranty Insurance Company, that have been
prepared in accordance with statutory insurance accounting standards, are
available upon request. The address of Capital Guaranty's headquarters and its
telephone number are Steuart Tower, 22nd Floor, One Market Plaza, San
Francisco, CA 94105-1413 and (415) 995-8000.
   
     CapMAC is a New York-domiciled monoline stock insurance company which
engages only in the business of financial guarantee and surety insurance.
CapMAC is licensed in 50 states in addition to the District of Columbia, the
Commonwealth of Puerto Rico and the territory of Guam. CapMAC insures
structured asset-backed, corporate, municipal and other financial obligations
in the domestic and foreign capital markets. CapMAC may also provide financial
guarantee reinsurance for structured asset-backed, corporate and municipal
obligations written by other major insurance companies.
 <PAGE>
24                         Unitholder Explanations

     CapMAC's claims-paying ability is rated "Aaa" by Moody's Investors
Service, Inc. ("Moody's"), "AAA" by Standard & Poor's Corporation ("Standard &
Poor's"), "AAA" by Duff & Phelps, Inc. ("Duff & Phelps") and "AAA" by
Nippon Investors Inc. Such ratings reflect only the views of the respective
rating agencies, are not recommendations to buy, sell or hold securities and
are subject to revision or withdrawal at any time by such rating agencies.

     CapMAC is wholly owned by CapMAC Holdings Inc. ("Holdings"), a company
that is owned by a group of institutional and other investors, including
CapMAC's management and employees.

     Neither Holdings nor any of its stockholders is obligated to pay any
claims under any surety bond issued by CapMAC or any debts of CapMAC or to
make additional capital contributions.

     CapMAC is regulated by the Superintendent of Insurance of the State of
New York. In addition, CapMAC is subject to regulation by the insurance
departments of the other jurisdictions in which it is licensed. CapMAC is
subject to periodic regulatory examinations by the same regulatory
authorities.

     CapMAC is bound by insurance laws and regulations regarding capital
transfers, limitations upon dividends, investment of assets, changes in
control, transactions with affiliates and consolidations and acquisitions. The
amount of exposure per risk that CapMAC may retain, after giving effect to
reinsurance, collateral or other security, is also regulated. Statutory and
regulatory accounting practices may prescribe appropriate rates at which
premiums are earned and the levels of reserves required. In addition, various
insurance laws restrict the incurrence of debt, regulate permissible
investments of reserves, capital and surplus, and govern the form of surety
bonds.

     CapMAC's obligations under the Surety Bond(s) may be reinsured. Such
reinsurance does not relieve CapMAC of any of its obligations under the Surety
Bond(s).

     THE SURETY BOND IS NOT COVERED BY THE PROPERTY/CASUALTY INSURANCE
SECURITY FUND SPECIFIED IN ARTICLE 76 OF THE NEW YORK INSURANCE LAW.

     As of December 31, 1993 and 1992, CapMAC had qualified statutory capital
(which consists of policyholders' surplus and contingency reserve) of
approximately $167 million and $161 million, respectively, and had not
incurred any debt obligations. Article 69 of the New York State Insurance Law
requires CapMAC to establish and maintain the contingency reserve, which is
available to cover claims under surety bonds issued by CapMAC.

     In addition to its qualified statutory capital and other reinsurance
available to pay claims under its surety bonds, CapMAC has entered into a Stop
Loss Reinsurance Agreement (the "Stop Loss Agreement") with Winterthur Swiss
Insurance Company (the "Reinsurer"), which is rated AAA by Standard & Poor's
and Aaa by Moody's, pursuant to which the Reinsurer will be required to pay
any losses incurred by CapMAC during the term of the Stop Loss Agreement on
the surety bonds covered under the Stop Loss Agreement in excess of a
specified amount of losses incurred by CapMAC under such surety bonds (such
specified amount initially being $100 million and increasing annually by an
amount equal to 66 2/3% of the increase in CapMAC's statutory capital and
surplus) up to an aggregate limit payable under the Stop Loss Agreement of $50
million. The Stop Loss Agreement has a term of seven years, is extendable for
one-year periods and is subject to early termination upon the occurrence of
certain events.

     CapMAC also has available a $100,000,000 standby corporate liquidity
facility (the "Liquidity Facility") provided by a syndicate of banks rated
A1+/P1 by Standard & Poor's and Moody's, respectively, having a term of 360
days. Under the Liquidity Facility CapMAC will be able, subject to satisfying
certain conditions, to borrow funds from time to time in order to enable it to
fund any claim payments or payments made in settlement or mitigation of claims
payments under its surety bonds, including the Surety Bond.
    
     Copies of CapMAC's financial statements prepared in accordance with
statutory accounting standards, which differ from generally accepted
accounting principles, and filed with the Insurance Department of the State of
New York are available upon request. CapMAC is located at 885 Third Avenue,
New York, New York 10022, and its telephone number is (212) 755-1155.

     In order to be in an Insured Trust, Bonds must be insured by one of the
Preinsured Bond Insurers or be eligible for the insurance being obtained by
such Trust. In determining eligibility for insurance, the Preinsured Bond
Insurers, AMBAC Indemnity and Financial Guaranty have applied their own
standards which correspond generally to the
 <PAGE>
                           Unitholder Explanations                          25
standards they normally use in establishing the insurability of new issues of
municipal bonds and which are not necessarily the criteria used in the
selection of Bonds by the Sponsor. To the extent the standards of the
Preinsured Bond Insurers, AMBAC Indemnity and Financial Guaranty are more
restrictive than those of the Sponsor, the previously stated Trust investment
criteria have been limited with respect to the Bonds. This decision is made
prior to the Date of Deposit, as debt obligations not eligible for insurance
are not deposited in an Insured Trust. Thus, all of the Bonds in the
portfolios of the Insured Trusts in the Fund are insured either by the
respective Trust or by the issuer of the Bonds, by a prior owner of such Bonds
or by the Sponsor prior to the deposit of such Bonds in a Trust.

     Because the Bonds are insured by one of the Portfolio Insurers or one of
the Preinsured Bond Insurers as to the timely payment of principal and
interest, when due, and on the basis of the various reinsurance agreements in
effect, Standard & Poor's Corporation has assigned to the Units of each
Insured Trust its "AAA" investment rating. See "Description of Securities
Ratings". The obtaining of this rating by an Insured Trust should not be
construed as an approval of the offering of the Units by Standard & Poor's
Corporation or as a guarantee of the market value of such Trust or of the
Units.

     An objective of portfolio insurance obtained by an Insured Trust is to
obtain a higher yield on the portfolio of such Trust than would be available
if all the Securities in such portfolio had Standard & Poor's Corporation
"AAA" rating and yet at the same time to have the protection of insurance of
prompt payment of interest and principal, when due, on the Bonds. There is, of
course, no certainty that this result will be achieved. Preinsured Bonds in an
Insured Trust (all of which are rated "AAA" by Standard & Poor's Corporation)
may or may not have a higher yield than uninsured bonds rated "AAA" by
Standard & Poor's Corporation. In selecting such Bonds for an Insured Trust,
the Sponsor has applied the criteria hereinbefore described.

     In the event of nonpayment of interest or principal, when due, in respect
of a Bond, AMBAC Indemnity shall make such payment not later than 30 days and
Financial Guaranty shall make such payment within one business day after the
respective insurer has been notified that such nonpayment has occurred or is
threatened (but not earlier than the date such payment is due). The insurer,
as regards any payment it may make, will succeed to the rights of the Trustee
in respect thereof. All policies issued by the Portfolio Insurers and the
Preinsured Bond Insurers are substantially identical insofar as obligations to
an Insured Trust are concerned.

     The Internal Revenue Service has issued a letter ruling which holds in
effect that insurance proceeds representing maturing interest on defaulted
municipal obligations paid to holders of insured bonds, under policy
provisions substantially identical to the policies described herein, will be
excludable from Federal gross income under Section 103(a)(1) of the Internal
Revenue Code to the same extent as if such payments were made by the issuer of
the municipal obligations. Holders of Units in an Insured Trust should discuss
with their tax advisers the degree of reliance which they may place on this
letter ruling. However, Chapman and Cutler, counsel for the Sponsor, has given
an opinion to the effect such payment of proceeds would be excludable from
Federal gross income if, and to the same extent as, such interest would have
been so excludable if paid by the issuer of the defaulted obligations. See
"Other Matters--Federal Tax Status".

     Each Portfolio Insurer is subject to regulation by the department of
insurance in the state in which it is qualified to do business. Such
regulation, however, is no guarantee that each Portfolio Insurer will be able
to perform on its contract of insurance in the event a claim should be made
thereunder at some time in the future. At the date hereof, it is reported that
no claims have been submitted or are expected to be submitted to any of the
Portfolio Insurers which would materially impair the ability of any such
company to meet its commitment pursuant to any contract of bond or portfolio
insurance.

     The information relating to each Portfolio Insurer has been furnished by
such companies. The financial information with respect to each Portfolio
Insurer appears in reports filed with state insurance regulatory authorities
and is subject to audit and review by such authorities. No representation is
made herein as to the accuracy or adequacy of such information or as to the
absence of material adverse changes in such information subsequent to the
dates thereof.
 <PAGE>
26                         Unitholder Explanations

     The Bonds in the Insured Trusts are insured as follows:
   
<TABLE>
<CAPTION>
                                                         BONDS INSURED        BONDS INSURED
                                                          UNDER AMBAC        UNDER FINANCIAL
                                                           INDEMNITY            GUARANTY            PREINSURED
                       TRUST                          PORTFOLIO INSURANCE  PORTFOLIO INSURANCE         BONDS           TOTAL
<S>                                                           <C>                  <C>                 <C>             <C>
IM-IT...............................................          0%                   0%                  100%            100%
IM-IT Short Intermediate............................          0%                   0%                  100%            100%
Florida IM-IT Intermediate
 Laddered Maturity..................................          0%                   0%                  100%            100%
Pennsylvania IM-IT..................................          0%                   0%                  100%            100%
</TABLE>

     The breakdown of the Preinsured Bonds is as follows: IM-IT--AMBAC
Indemnity 27%, Financial Guaranty 18%, MBIA 35% and FSA 20%; IM-IT Short
Intermediate Trust--AMBAC Indemnity 15%, Financial Guaranty 15%, MBIA 59% and
FSA 11%; Florida IM-IT Intermediate Laddered Maturity Trust--AMBAC Indemnity
20%, Financial Guaranty 20% and MBIA 60%; Pennsylvania IM-IT Trust--AMBAC
Indemnity 10%, Financial Guaranty 8%, MBIA 64% and FSA 18%.
    
 <PAGE>
                              IM-IT-- Series 318                            27
   
IM-IT

      GENERAL. The IM-IT consists of 12 issues of Securities. Three of the
Bonds in the IM-IT are general obligations of the governmental entities
issuing them and are backed by the taxing power thereof. The remaining issues
are payable from the income of a specific project or authority and are not
supported by the issuer's power to levy taxes. These issues are located in 10
states or territories, divided by purpose of issues (and percentage of
principal amount to total IM-IT) as follows: Retail Electric/Gas, 2 (17%);
General Obligations, 3 (15%); Health Care, 1 (15%); Transportation, 1 (15%);
Certificates of Participation, 1 (10%); Tax District, 1 (10%); Wholesale
Electric, 1 (10%); General Purpose, 1 (5%) and Public Building, 1 (3%). No
Bond issue has received a provisional rating. The dollar weighted average
maturity of the Bonds in the Trust is 28 years.

     TAX STATUS. For a discussion of the Federal tax status of income earned
on IM-IT Units, see "Other Matters-- Federal Tax Status".

<TABLE>
<CAPTION>
PER UNIT INFORMATION:
CALCULATION OF ESTIMATED NET ANNUAL UNIT INCOME <F1>
<S>                                                                                                              <C>     
      Estimated Annual Interest Income per Unit................................................................  $  53.18
      Less: Estimated Annual Expense per Unit <F2>.............................................................  $   1.64
      Less: Annual Premium on Portfolio Insurance per Unit.....................................................       --
      Estimated Net Annual Interest Income per Unit............................................................  $  51.54
CALCULATION OF ESTIMATED INTEREST EARNINGS PER UNIT:
      Estimated Net Annual Interest Income per Unit............................................................  $  51.54
      Divided by 12............................................................................................  $   4.30
Estimated Daily Rate of Net Interest Accrual per Unit..........................................................  $ .14314
ESTIMATED CURRENT RETURN BASED ON PUBLIC OFFERING PRICE <F1><F3><F4><F5>.......................................      5.15%
ESTIMATED LONG-TERM RETURN <F3><F4><F5>........................................................................      5.22%
Initial Distribution (April 1994)..............................................................................  $   4.01
ESTIMATED NORMAL DISTRIBUTION PER UNIT <F5>....................................................................  $   4.30
PURCHASED INTEREST <F6>........................................................................................  $   6.76

Trustee's Annual Fee <F1>.............. $.98 per $1,000 principal amount of
                                        Bonds
Record and Computation Dates........... FIRST day of each month
DISTRIBUTION DATES..................... FIFTEENTH DAY OF EACH MONTH COMMENCING
                                        APRIL 15, 1994

<FN>
<F1> During the first year the Trustee will reduce its fee by approximately
     $.10 per Unit (which amount is the estimated interest to be earned per
     Unit prior to the expected delivery dates for the "when, as and if issued"
     Bonds included in this Trust). Should such estimated interest exceed such
     amount, the Trustee will reduce its fee up to its annual fee. After the
     first year, the Trustee's fee will be that amount indicated above.
     Estimated annual interest income per Unit will be increased to $53.28.
     Estimated Annual Expense per Unit (excluding insurance) will be increased
     to $1.74; and estimated net annual interest income per Unit will remain
     the same as shown. See "Estimated Current Returns and Estimated Long-Term
     Returns." Based on the outstanding principal amount of Securities as of
     the Date of Deposit, the Trustee's annual fee would be $9,629.

<F2> Excluding insurance costs.

<F3> The Estimated Current Return and Estimated Long-Term Return are increased
     for transactions entitled to a reduced sales charge. See "Unitholder
     Explanations--Public Offering--General".

<F4> The Estimated Current Return is calculated by dividing the estimated net
     annual interest income per Unit by the Public Offering Price. The
     estimated net annual interest income per Unit will vary with changes in
     fees and expenses of the Trustee and the Evaluator and with the principal
     prepayment, redemption, maturity, exchange or sale of Securities while
     the Public Offering Price will vary with changes in the offering price of
     the underlying Securities and with changes in the Purchased Interest;
     therefore, there is no assurance that the present Estimated Current
     Return indicated above will be realized in the future. The Estimated
     Long-Term Return is calculated using a formula which <F1>takes into
     consideration, and determines and factors in the relative weightings of,
     the market values, yields (which takes into account the amortization of
     premiums and the accretion of discounts) and estimated retirements of all
     of the Securities in the Trust and <F2>takes into account the expenses
     and sales charge associated with each Trust Unit. Since the market values
     and estimated retirements of the Securities and the expenses of the Trust
     will change, there is no assurance that the present Estimated Long-Term
     Return as indicated above will be realized in the future. The Estimated
     Current Return and Estimated Long-Term Return are expected to differ
     because the calculation of the Estimated Long-Term Return reflects the
     estimated date and amount of principal returned while the Estimated
     Current Return calculation includes only net annual interest income and
     Public Offering Price.

<F5> These figures are based on estimated per Unit cash flows. Estimated cash
     flows will vary with changes in fees and expenses, with changes in
     current interest rates and with the principal prepayment, redemption,
     maturity, call, exchange or sale of the underlying Securities. The
     estimated cash flows for this Series are set forth under "Estimated Cash
     Flows to Unitholders".

<F6> See "Unitholder Explanations--Purchased and Accrued Interest".
</TABLE>
 <PAGE>
28                            IM-IT-- Series 318

<TABLE>
INSURED MUNICIPALS INCOME TRUST
SERIES 318 (155TH INSURED MULTI-SERIES)
PORTFOLIO AS OF FEBRUARY 24, 1994
<CAPTION>

              NAME OF ISSUER, TITLE, INTEREST RATE AND                                                        OFFERING
AGGREGATE     MATURITY DATE OF EITHER BONDS DEPOSITED OR                                  REDEMPTION          PRICE TO
PRINCIPAL<F1> BONDS CONTRACTED FOR<F1><F5>                                     RATING<F2> FEATURE<F3>         IM-IT<F4>
<S>           <C>                                                                <C>      <C>                 <C>
$    300,000  Avon Community School Building Corporation, First Mortgage
                Revenue Bonds, Series 1994 (Hendricks County, Indiana) MBIA
                Insured                                                                   2004 @ 101
                #5.50% Due 1/1/2016..........................................     AAA     2010 @ 100 S.F.     $     294,033
   1,500,000  Illinois State Toll Highway Authority, Toll Highway Priority
                Revenue Bonds, Series 1992A (FGIC Insured)
                #5.75% Due 1/1/2017..........................................     AAA     2003 @ 102              1,492,815
   1,000,000  Washington State Public Power Supply System, Nuclear Project
                No.1, Refunding Revenue Bonds, Series 1993A (MBIA Insured)                2003 @ 102
                #5.70% Due 7/1/2017..........................................     AAA     2014 @ 100 S.F.         1,000,000
     150,000  City of New Orleans, Louisiana, General Obligation Refunding
                Bonds, Series 1991 (AMBAC Indemnity Insured)
                #0.00% Due 9/1/2018..........................................     AAA                                36,684<F6>
     275,000  Romulus Community School District, Wayne County, Michigan,
                General Obligation Refunding Bonds, Series 1993 (FGIC
                Insured)
                #0.00% Due 5/1/2020..........................................     AAA                                61,116<F6>
   1,000,000  Palmdale, California, School District Refunding Certificates of
                Participation, 1993 Refunding Project (FSA Insured)
                5.60% Due 9/1/2020...........................................     AAA     2003 @ 102                984,710
   1,000,000  South Carolina State Public Service Authority, Revenue
                Refunding Bonds, Series A (MBIA Insured)                                  2003 @ 102
                #5.50% Due 7/1/2021..........................................     AAA     2014 @ 100 S.F.           977,370
   1,500,000  Wisconsin State Health and Educational Facilities Authority,
                Hospital Revenue Bonds (Waukesha Memorial Hospital Inc.)
                AMBAC Indemnity Insured                                                   2003 @ 102
                #5.70% Due 8/15/2022.........................................     AAA     2014 @ 100 S.F.         1,486,665
     500,000  Pennsylvania Intergovernmental Cooperation Authority, Special
                Tax Revenue Bonds (City of Philadelphia Funding Program)
                Series 1993 (MBIA Insured)                                                2003 @ 100
                #5.625% Due 6/15/2023........................................     AAA     2016 @ 100 S.F.           497,140
   1,000,000  State of Maryland, Community Development Administration,
                Department of Housing and Community Development,
                Infrastructure Financing Bonds, Series 1994A (AMBAC Indemnity
                Insured)**                                                                2004 @ 102
                5.70% Due 6/1/2024...........................................    YAAA     2017 @ 100 S.F.         1,005,000
     600,000  Lehigh County Industrial Development Authority, Pollution
                Control Revenue Refunding Bonds (Pennsylvania Power & Light
                Company Project) Series 1994A (MBIA Insured)
                #5.50% Due 2/15/2027.........................................    YAAA     2004 @ 102                585,228
   1,000,000  The Community Redevelopment Agency of the City of Los Angeles,
                California (Bunker Hill Redevelopment Project) Tax Allocation
                Revenue Refunding Bonds, Series H (FSA Insured)                           2003 @ 102
                #5.60% Due 12/1/2028.........................................     AAA     2024 @ 100 S.F.           982,450
$  9,825,000                                                                                                    $ 9,403,211
</TABLE>

All of the Bonds in the portfolio are insured by one of the Preinsured Bond
Insurers as indicated in the Bond name. See "Unitholder
Explanations--Insurance on the Bonds in the Insured Trusts".

For an explanation of the footnotes used on this page, see "Notes to
Portfolios".
 <PAGE>
                    IM-IT-- 90th Short Intermediate Series                  29

IM-IT SHORT INTERMEDIATE TRUST

      GENERAL. The IM-IT Short Intermediate Trust consists of 13 issues of
Securities. Six of the Bonds in the IM-IT Short Intermediate Trust are general
obligations of the governmental entities issuing them and are backed by the
taxing power thereof. The remaining issues are payable from the income of a
specific project or authority and are not supported by the issuer's power to
levy taxes. These issues are located in 7 states or territories, divided by
purpose of issues (and percentage of principal amount of total IM-IT Short
Intermediate Trust) as follows: General Obligations, 6 (40%); Higher
Education, 1 (15%); Certificates of Participation, 1 (12%); Retail
Electric/Gas, 1 (11%); Water and Sewer, 1 (10%); Health Care, 2 (8%) and
Airport, 1 (4%). Three bond issues aggregating approximately 25% of the
principal amount of the Securities in the Trust are obligations of issuers
located in the State of Washington. No Bond issue has received a provisional
rating. All of the obligations in the IM-IT Short Intermediate Trust mature
within 3-7 years of the Date of Deposit. The dollar weighted average maturity
of the Bonds in the Trust is 4.9 years.

     TAX STATUS. For a discussion of the Federal tax status of income earned
on IM-IT Short Intermediate Trust Units, see "Other Matters--Federal Tax
Status".

<TABLE>
<CAPTION>
PER UNIT INFORMATION:
CALCULATION OF ESTIMATED NET ANNUAL UNIT INCOME <F1>
<S>                                                                                                              <C>
      Estimated Annual Interest Income per Unit................................................................  $   39.67
      Less: Estimated Annual Expense per Unit <F2>.............................................................  $    1.43
      Less: Annual Premium on Portfolio Insurance per Unit.....................................................     --
      Estimated Net Annual Interest Income per Unit............................................................  $   38.24
CALCULATION OF ESTIMATED INTEREST EARNINGS PER UNIT:
      Estimated Net Annual Interest Income per Unit............................................................  $   38.24
      Divided by 12............................................................................................  $    3.19
Estimated Daily Rate of Net Interest Accrual per Unit..........................................................  $  .10622
ESTIMATED CURRENT RETURN BASED ON PUBLIC OFFERING PRICE <F1><F3><F4><F5>.......................................       3.72%
ESTIMATED LONG-TERM RETURN <F3><F4><F5>........................................................................       3.87%
Initial Distribution (April 1994)..............................................................................  $    2.97
ESTIMATED NORMAL DISTRIBUTION PER UNIT <F5>....................................................................  $    3.19
PURCHASED INTEREST <F6>........................................................................................  $    5.70

Trustee's Annual Fee <F1>.............. $.98 per $1,000 principal amount of
                                        Bonds
Record and Computation Dates........... FIRST day of each month
DISTRIBUTION DATES..................... FIFTEENTH DAY OF EACH MONTH COMMENCING
                                        APRIL 15, 1994

<FN>
<F1> During the first year the Trustee will reduce its fee by approximately
     $.47 per Unit (which amount is the estimated interest to be earned per
     Unit prior to the expected delivery dates for the "when, as and if
     issued" Bonds included in this Trust). Should such estimated interest
     exceed such amount, the Trustee will reduce its fee up to its annual fee.
     After the first year, the Trustee's fee will be that amount indicated
     above. Estimated annual interest income per Unit will be increased to
     $40.14. Estimated Annual Expense per Unit (excluding insurance) will be
     increased to $1.90; and estimated net annual interest income per Unit
     will remain the same as shown. See "Estimated Current Returns and
     Estimated Long-Term Returns." Based on the outstanding principal amount
     of Securities as of the Date of Deposit, the Trustee's annual fee would
     be $5,909.
<F2> Excluding insurance costs.
<F3> The Estimated Current Return and Estimated Long-Term Return are increased
     for transactions entitled to a reduced sales charge. See "Unitholder
     Explanations--Public Offering--General".
<F4> The Estimated Current Return is calculated by dividing the estimated net
     annual interest income per Unit by the Public Offering Price. The
     estimated net annual interest income per Unit will vary with changes in
     fees and expenses of the Trustee and the Evaluator and with the principal
     prepayment, redemption, maturity, exchange or sale of Securities while
     the Public Offering Price will vary with changes in the offering price of
     the underlying Securities and with changes in the Purchased Interest;
     therefore, there is no assurance that the present Estimated Current
     Return indicated above will be realized in the future. The Estimated
     Long-Term Return is calculated using a formula which <F1>takes into
     consideration, and determines and factors in the relative weightings of,
     the market values, yields (which takes into account the amortization of
     premiums and the accretion of discounts) and estimated retirements of all
     of the Securities in the Trust and <F2>takes into account the expenses
     and sales charge associated with each Trust Unit. Since the market values
     and estimated retirements of the Securities and the expenses of the Trust
     will change, there is no assurance that the present Estimated Long-Term
     Return as indicated above will be realized in the future. The Estimated
     Current Return and Estimated Long-Term Return are expected to differ
     because the calculation of the Estimated Long-Term Return reflects the
     estimated date and amount of principal returned while the Estimated
     Current Return calculation includes only net annual interest income and
     Public Offering Price.
 <PAGE>
30                  IM-IT-- 90th Short Intermediate Series

<F5> These figures are based on estimated per Unit cash flows. Estimated cash
     flows will vary with changes in fees and expenses, with changes in
     current interest rates and with the principal prepayment, redemption,
     maturity, call, exchange or sale of the underlying Securities. The
     estimated cash flows for this Series are set forth under "Estimated Cash
     Flows to Unitholders".
<F6> See "Unitholder Explanations--Purchased and Accrued Interest".
</TABLE>
 <PAGE>
                    IM-IT-- 90th Short Intermediate Series                  31

<TABLE>
INSURED MUNICIPALS INCOME TRUST
90TH SHORT INTERMEDIATE SERIES (155TH INSURED MULTI-SERIES)
PORTFOLIO AS OF FEBRUARY 24, 1994
<CAPTION>

                                                                                                              OFFERING
                                                                                                              PRICE TO
              NAME OF ISSUER, TITLE, INTEREST RATE AND                                                        IM-IT SHORT
AGGREGATE     MATURITY DATE OF EITHER BONDS DEPOSITED OR                                  REDEMPTION          INTERMEDIATE
PRINCIPAL<F1> BONDS CONTRACTED FOR<F1><F5>                                     RATING<F2> FEATURE<F3>         TRUST<F4>
<S>           <C>                                                                 <C>     <C>                 <C>
$    400,000  City of Chicago Heights, Cook County, Illinois, General
                Obligation Corporate Purpose Bonds, Series 1993A (FGIC
                Insured)
                200M--5.00% Due 12/1/1997....................................     AAA                         $     207,632
                200M--5.10% Due 12/1/1998....................................     AAA                               208,410
     500,000  Chicago School Finance Authority, Illinois, General Obligation
                School Financing Bonds, Series 1994A (MBIA Insured)
                4.40% Due 6/1/1998...........................................     AAA                               505,695
   1,000,000  District of Columbia (Washington, D.C.) General Obligation
                Refunding Bonds, Series 1994A (MBIA Insured)
                4.10% Due 6/1/1998...........................................     AAA                               999,840
     500,000  Tolleson Unified High School District No. 214 of Maricopa
                County, Arizona, School Improvement and Refunding General
                Obligation Bonds, Second Series of 1993 (FGIC Insured)
                #300M--0.00% Due 7/1/1998....................................     AAA                               250,881<F6>
                #200M--0.00% Due 7/1/1999....................................     AAA                               158,788<F6>
     500,000  The Health and Educational Facilities Board of the City of
                Johnson City, Tennessee, Hospital Revenue Refunding Bonds
                (Johnson City Medical Center Hospital) Series 1994 (MBIA
                Insured)**
                #250M--4.00% Due 7/1/1998....................................     AAA                               249,943
                #250M--4.125% Due 7/1/1999...................................     AAA                               248,867
     605,000  Spokane County, Washington, Sewer Revenue and Refunding Bonds,
                Series 1994A (MBIA Insured)**
                #4.00% Due 12/1/1998.........................................     AAA                               603,360
     900,000  University of Louisville, Kentucky, Consolidated Educational
                Buildings, Refunding Revenue Bonds, Series K (AMBAC Indemnity
                Insured)**
                4.50% Due 5/1/1999...........................................     AAA                               911,529
     250,000  Spokane County, Washington, Airport Revenue Refunding Bonds,
                Series 1993 (MBIA Insured)
                #4.80% Due 6/1/1999..........................................     AAA                               256,148
     675,000  Washington State Public Power Supply System, Nuclear Project
                No. 2, Refunding Revenue Bonds, Series 1993A (FSA Insured)
                #4.75% Due 7/1/1999..........................................     AAA                               688,608
     700,000  Desert Sands, California, Unified School District, Refunding
                Certificates of Participation, Series 1994D (MBIA Insured)**
                #4.25% Due 3/1/2000..........................................     AAA                               695,338
                                                                                                              $   5,985,039
$  6,030,000
</TABLE>

All of the Bonds in the portfolio are insured by one of the Preinsured Bond
Insurers as indicated in the Bond name. See "Unitholder
Explanations--Insurance on the Bonds in the Insured Trusts".

For an explanation of the footnotes used on this page, see "Notes to
Portfolios".
 <PAGE>
32          Florida IM-IT Intermediate Laddered Maturity Series 6

FLORIDA IM-IT INTERMEDIATE LADDERED MATURITY TRUST

      GENERAL. The Florida IM-IT Intermediate Laddered Maturity Trust consists
of 5 issues of Securities. One of the Bonds in the Florida IM-IT Intermediate
Laddered Maturity Trust is a general obligation of the governmental entity
issuing it and is backed by the taxing power thereof. The remaining issues are
payable from the income of a specific project or authority and are not
supported by the issuer's power to levy taxes. These issues are divided by
purpose of issues (and percentage of principal amount to total Florida IM-IT
Intermediate Laddered Maturity Trust) as follows: Retail Electric/Gas, 2
(40%); General Obligations, 1 (20%); Health Care, 1 (20%) and Industrial
Revenue, 1 (20%). No Bond issue has received a provisional rating. All of the
obligations in the Florida IM-IT Intermediate Laddered Maturity Trust mature
within approximately 5-10 years of the Date of Deposit. Commencing in
approximately the fifth year of the Trust, roughly 20% of the Bonds contained
in the Trust will mature each year. The dollar weighted average maturity of
the Bonds in the Trust is 8.56 years.

     SPECIAL CONSIDERATIONS. Florida's economy has in the past been highly
dependent on the construction industry and construction related manufacturing.
This dependency has declined in recent years and continues to do so as a
result of continued diversification of the State's economy. For example, in
1980 total contract construction employment as a share of total non-farm
employment was just over seven percent and in 1990 the share had edged
downward to six percent. This trend is expected to continue as Florida's
economy continues to diversify. Florida, nevertheless, has a dynamic
construction industry with single and multi-family housing starts accounting
for 9.48% of total U.S. housing starts in 1991 while the State's population is
5.3% of the U.S. total population. Florida's housing starts since 1980 have
represented an average of 11.5% of the U.S.'s total annual starts, and except
for the recession years 1980-82, and the recession beginning in 1990, starts
have exceded 160,000 a year.

     A driving force behind the State's construction industry has been the
State's rapid rate of population growth. Although Florida currently is the
fourth most populous state, its annual population growth is now projected to
decline as the number of people moving into the State is expected to hover
near the mid 200,000 range annually well into the 1990s. This population trend
should provide plenty of fuel for business and home builders to keep
construction activity lively in Florida for some time to come. However, other
factors do influence the level of construction in the State. For example,
Federal tax reform in 1986 and other changes to the Federal income tax code
have eliminated tax deductions for owners of two or more residential real
estate properties and have lengthened depreciation schedules on investment and
commercial properties. Economic growth and existing supplies of commercial
buildings and homes also contribute to the level of construction activity in
the State.

     Since 1980, the State's job creation rate is well over twice the rate for
the nation as a whole, and its growth rate in new non-agricultural jobs is the
fastest of the 11 most populous states and second only to California in the
absolute number of new jobs created. Contributing to the State's rapid rate of
growth in employment and income is international trade. Since 1980, the
State's unemployment rate has generally been below that of the U.S. Only in
the last two years has the State's unemployment rate moved ahead of the
national average. According to the U.S. Department of Commerce, the Florida
Department of Labor and Employment Security, and the Florida Consensus
Economic Estimating Conference (together the "Organization") the State's
unemployment rate was 5.9% during 1990. As of April 1992, the Organization
forecasts that when final numbers are in, the unemployment rate for 1991 will
be 7.3% and estimates that it will be 8.1% for 1992. The State's non-farm
employment is expected to decline 1.5% in 1991-92 and rise 1.8% in 1992-93,
mirroring the path of employment growth nationally. The State's two largest
and fastest growing private employment categories are the service and trade
sectors. Together, they account for more than 50% of the total non-farm
employment growth between 1991-92 and 1992-93. Employment in these sectors is
expected to decline 3.6% for trade and growth and 1.5% for services in 1991-92
and are expected to grow 0.7% and 3.7% in 1992-93, respectively. The service
sector has overtaken the trade sector and is now the State's largest
employment category.

     Tourism. Tourism is one of Florida's most important industries.
Approximately 39.3 million tourists visited the State in 1991, as reported by
the Florida Department of Commerce. In terms of business activities and state
tax revenues, tourists in Florida in 1991 represented an estimated 4.4 million
additional residents. Visitors to the State
 <PAGE>
            Florida IM-IT Intermediate Laddered Maturity Series 6           33
tend to arrive equally by air and car. The State's tourism industry over the
years has become more sophisticated, attracting visitors year-round and, to a
degree, reducing its seasonality. Tourist arrivals should be slightly
negatively impacted as a result of Hurricane Andrew, but should recover and
approximate in 1993-94 the number expected prior to the storm. When the final
numbers are in, it is expected that by the end of the State's current fiscal
year, 41.9 million domestic and international tourists will have visited the
State, up 7.8% from the 39 million tourists that visited Florida in 1991-92.
In 1993-94, tourist arrivals should approximate 43.2 million.

     The State's per capita personal income in 1990 of $18,539 was slightly
below the national average of $18,696 and significantly ahead of that for the
southeast United States, which was $16,514. Growth in real personal income in
the State follows a course similar to that of the nation, increasing 0.3% in
1991-92 and increasing 2.7% in 1992-93. Between 1990-91 and 1992-93, real
personal income per capita in the State is expected to average 0.5% less than
its 1990-91 level.

     Compared to other states, Florida has a proportionately greater
retirement age population which comprises 18.3% (as of April 1, 1991) of the
State's population and is forecast to grow at an average annual rate of over
1.96% through the 1990s. Thus, property income (dividends, interest, and rent)
and transfer payments (Social Security and pension benefits, among other
sources of income) are a relatively more important source of income. For
example, Florida's total wages and salaries and other labor income in 1990 was
54.9% of total income, while a similar figure for the nation for 1990 was
64.8%. Transfer payments are typically less sensitive to the business cycle
than employment income and, therefore, act as stabilizing forces in weak
economic periods. While many of the U.S.'s senior citizens choose the State as
their place of retirement, the State is also recognized as attracting a
significant number of working age people. Since 1980, the prime working age
population (18-44) has grown at an average annual rate of 3.6%.

     In fiscal year 1991-92, approximately 64% of the State's total direct
revenue to its three operating funds was derived from State taxes, with
federal grants and other special revenue accounting for the balance. State
sales and use tax, corporate income tax, and beverage tax amounted to 68%, 7%
and 5%, respectively, of total receipts by the General Revenue Fund during
fiscal year 1991-92. In that same year, expenditures for education, health and
welfare, and public safety amounted to 53%, 30% and 13.3%, respectively, of
total expenditures from the General Revenue Fund.

     Hurricane Andrew left some parts of south Florida devastated.
Post-Hurricane Andrew clean up and rebuilding have changed the outlook for the
State's economy. Single and multi-family housing starts in 1992-93 are
projected to reach a combined level of 116,800, and to increase to 148,100 in
1993-94. Lingering recessionary effects on consumers and tight credit are two
of the reasons for relatively slow core construction activity, as well as
lingering effects from the 1986 tax reform legislation discussed above.
However, construction is one of the sectors most severely affected by
Hurricane Andrew. The construction figures above include, over the two year
period, more than 20,000 additional housing starts as a result of destruction
by Hurricane Andrew. Total construction expenditures are forecasted to
increase 11.1% this year and increase 23.7% next year.

     The State Constitution and statutes mandate that the State budget, as a
whole, and each separate fund within the State budget, be kept in balance from
currently available revenues each fiscal year. If the Governor or Comptroller
believes a deficit will occur in any State fund, by statute, he must certify
his opinion to the Administrative Commission, which then is authorized to
reduce all State agency budgets and releases by a suffficient amount to
prevent a deficit in any fund. Additionally, the State Constitution prohibits
issuance of State obligations to fund State operations.

     Estimated fiscal year 1991-92 General Revenue plus Working Capital funds
available total $11,228.1 million. Compared to 1991-92 Estimated General
Revenues of $11,138.6 million, the State was left with unencumbered reserves
of $89.5 million at the end of its fiscal year. Estimated fiscal year 1992-93
General Revenue plus Working Capital funds available total $11,980.1 million,
a 6.7% increase over 1991-92. The $11,859.2 million in combined Estimated
Revenues and revenue generating measures represents an increase of 9.5% over
the previous year's Estimated Revenues. In a June 1992 Special Session of the
State Legislature, the Legislature passed a number of tax rate and base
increases to raise an additional $378.5 million in the State's 1992-93 fiscal
year. With effective General Revenue appropriations at $11,861.9 million,
unencumbered reserves at the end of the fiscal year are estimated at
 <PAGE>
34          Florida IM-IT Intermediate Laddered Maturity Series 6
$118.2 million. Current estimates make it likely that this figure will
increase when revenue collections for 1991-92 are finalized.

     The State's sales and use tax (6%) currently accounts for the State's
single largest source of tax receipts. Slightly less than 10% of the State's
sales and use tax is designated for local governments and is distributed to
the respective counties in which collected for such use by such counties and
the municipalities therein. In addition to this distribution, local
governments may (by referendum) assess a 0.5% or a 1.0% discretionary sales
tax within their county. Proceeds from this local option sales tax are
earmarked for funding local infrastructure programs and acquiring land for
public recreation or conservation or protection of natural resources as
provided under Florida law. Certain charter counties have other taxing powers
in addition, and non-consolidated counties with a population in excess of
800,000 may levy a local option sales tax to fund indigent health care. It
alone cannot exceed 0.5% and when combined with the infrastructure surtax
cannot exceed 1.0%. For the fiscal year ended June 30, 1992, sales and use tax
receipts (exclusive of the tax on gasoline and special fuels) totalled
$8,375.5 million, an increase of 2.7% over fiscal year 1990-91.

     The State imposes an alcoholic beverage wholesale tax (excise tax) on
beer, wine, and liquor. This tax is one of the State's major tax sources, with
revenues totalling $435.2 million in fiscal year ending June 30, 1992.
Alcoholic beverage tax receipts declined 1.0% over the previous year. The
revenues collected from this tax are deposited into the State's General
Revenue Fund.

     The second largest source of State tax receipts is the tax on motor
fuels. However, these revenues are almost entirely dedicated trust funds for
specific purposes and are not included in the State's General Revenue Fund.

     The State imposes a corporate income tax. All receipts of the corporate
income tax are credited to the General Revenue Fund. For the fiscal year ended
June 30, 1992, receipts from this source were $801.3 million, an increase of
14.2% from fiscal year 1990-91.

     The State also imposes a stamp tax on deeds and other documents relating
to realty, corporate shares, bonds, certificates of indebtedness, promissory
notes, wage assignments, and retail charge accounts. The documentary stamp tax
collections totaled $472.4 million during fiscal year 1991-92, a 0.5% increase
from the previous fiscal year. For the fiscal year 1990-91, 76.21% of the
documentary stamp tax revenues was deposited to the general Revenue Fund.
Beginning in fiscal year 1992-93, 71.29% of these taxes are to be deposited to
the General Revenue Fund.

     On January 12, 1988, the State began its own lottery. State law requires
that lottery revenues be distributed 50% to the public in prizes, 38% for use
in enhancing education, and the balance, 12.0% for costs of administering the
lottery. Fiscal year 1991-92 lottery ticket sales totalled $2.19 billion,
providing education with $835.4 million.

     The State's severance tax applies to oil, gas, and sulphur production, as
well as the severance of phosphate rock and other solid minerals. Total
collections from severance taxes total $67.2 million during fiscal year
1991-92, down 6.9% from the previous year. Beginning in fiscal year 1989-90,
60.0% of this amount was transferred to the General Revenue Fund. The 60.0%
allocation is expected to continue.

     Debt-Balanced Budget Requirement. At the end of fiscal 1992,
approximately $4.52 billion in principal amount of debt secured by the full
faith and credit of the State was outstanding. In addition, since July 1,
1992, the State issued about $274 million in principal amount of full faith
and credit bonds.

     The State Constitution and statutes mandate that the State budget, as a
whole, and each separate fund within the State budget, be kept in balance from
currently available revenues each fiscal year. If the Governor or Comptroller
believe a deficit will occur in any State fund, by statute, he must certify
his opinion to the Administrative Commission, which then is authorized to
reduce all State agency budgets and releases by a sufficient amount to prevent
a deficit in any fund. Additionally, the State Constitution prohibits issuance
of State obligations to fund State operations.

     Currently under litigation are several issues relating to State actions
or State taxes that put at risk substantial amounts of General Revenue Fund
monies. Accordingly, there is no assurance that any of such matters,
individually or in the aggregate, will not have a material adverse affect on
Florida's financial position.

     In the wake of the U.S. Supreme Court decision holding that a Hawaii law
unfairly discriminated against out-of-state liquor producers, suits have been
filed in the State's courts contesting a similar State law (in effect prior to
1985)
 <PAGE>
            Florida IM-IT Intermediate Laddered Maturity Series 6           35
that seek $384 million in tax refunds. A trial court, in a ruling that was
subsequently upheld by the State's Supreme Court, found the State law in
question to be unconstitutional but made its ruling operate prospectively,
thereby denying any tax refunds. The issue of whether the unconstitutionality
of the tax should be applied retroactively was recently decided by the United
States Supreme Court. The Supreme Court found in favor of the taxpayers. On
remand from the U.S. Supreme Court, the Florida Supreme Court, on January 15,
1991, mandated further proceedings to fashion a "clear and certain remedy"
consistent with constitutional restrictions and the opinion of the U.S.
Supreme Court. The Florida Department of Revenue has proposed to the Florida
Supreme Court that the Department be allowed to collect back tax from those
who received a tax preference under the prior law. If the Department's
proposal is rejected and tax refunds are ordered to all potential claimants, a
liability of approximately $298 million could result. The case is now before
the Florida Circuit Court, Second Judicial District. That court will hear the
affected parties' response to the Department's proposed collection of the tax
at the higher rate charged to out-of-staters.

     Florida law provides preferential tax treatment to insurers who maintain
a home office in the State. Certain insurers challenged the constitutionality
of this tax preference and sought a refund of taxes paid. Recently, the State
Supreme Court ruled in favor of the State. Similar issues have been raised in
other cases where insurers have challenged taxes imposed on premiums received
for certain motor vehicle service agreements. These four cases and pending
refund claims total about $200 million.

     Florida maintains a bond rating of Aa and AA from Moody's Investors
Service and Standard & Poor's Corporation, respectively, on the majority of
its general obligation bonds, although the rating of a particular series of
revenue bonds relates primarily to the project, facility, or other revenue
sources from which such series derives funds for repayment. While these
ratings and some of the information presented above indicate that Florida is
in satisfactory economic health, there can be no assurance that there will not
be a decline in economic conditions or that particular Municipal Obligations
purchased by the Fund will not be adversely affected by any such changes.

     The sources for the information presented above include official
statements and financial statements of the State of Florida. While the Sponsor
has not independently verified this information, the Sponsor has no reason to
believe that the information is not correct in all material respects.

     TAX STATUS. For a discussion of the Federal tax status of income earned
on Florida IM-IT Intermediate Laddered Maturity Trust Units, see "Other
Matters--Federal Tax Status".

     The Bonds were accompanied by opinions of Bond Counsel to the respective
issuers thereof to the effect that the Bonds were exempt from the Florida
intangibles tax. Neither the Sponsor nor its counsel have independently
reviewed such opinions or examined the Bonds to be deposited in and held by
the Florida IM-IT Intermediate Laddered Maturity Trust and have assumed the
correctness as of the date of deposit of the opinions of Bond Counsel.

      In the opinion of Chapman and Cutler, counsel to the Sponsor, under
      existing law:

           For Florida state income tax purposes, the Florida IM-IT
      Intermediate Laddered Maturity Trust will not be subject to the Florida
      income tax imposed by Chapter 220, Florida Statutes. In addition,
      Florida does not impose any income taxes at the local level.

           Because Florida does not impose an income tax on individuals,
      non-corporate Unitholders residing in Florida will not be subject to any
      Florida income taxation on income realized by the Florida IM-IT
      Intermediate Laddered Maturity Trust. Any amounts paid to the Florida
      IM-IT Intermediate Laddered Maturity Trust or to non-corporate
      Unitholders residing in Florida under an insurance policy issued to the
      Florida IM-IT Intermediate Laddered Maturity Trust or the Sponsor which
      represent maturing interest on defaulted obligations held by the Trustee
      will not be subject to the Florida income tax imposed by Chapter 220,
      Florida Statutes.

           Corporate Unitholders with commercial domiciles in Florida will be
      subject to Florida income or franchise taxation on income realized by
      the Florida IM-IT Intermediate Laddered Maturity Trust and on payments
      of interest pursuant to any insurance policy. Other corporate
      Unitholders will be subject to Florida income or franchise taxation on
      income realized by the Florida IM-IT Intermediate Laddered Maturity
      Trust (or on payments of interest pursuant to any insurance policy) only
      to the extent that the income realized does not constitute "non-business
      income" as defined by Chapter 220.
 <PAGE>
36          Florida IM-IT Intermediate Laddered Maturity Series 6

           Units will be subject to Florida estate tax only if held by Florida
      residents. However, the Florida estate tax is limited to the amount of
      the credit for state death taxes provided for in Section 2011 of the
      Internal Revenue Code.

           Neither the Bonds nor the Units will be subject to the Florida ad
      valorem property tax, the Florida intangible personal property tax or
      Florida sales or use tax.

<TABLE>
<CAPTION>
PER UNIT INFORMATION:
CALCULATION OF ESTIMATED NET ANNUAL UNIT INCOME <F1>
<S>                                                                                                              <C>
      Estimated Annual Interest Income per Unit................................................................  $   43.62
      Less: Estimated Annual Expense per Unit <F2>.............................................................  $    1.40
      Less: Annual Premium on Portfolio Insurance per Unit.....................................................     --
      Estimated Net Annual Interest Income per Unit............................................................  $   42.22
CALCULATION OF ESTIMATED INTEREST EARNINGS PER UNIT:
      Estimated Net Annual Interest Income per Unit............................................................  $   42.22
      Divided by 12............................................................................................  $    3.52
Estimated Daily Rate of Net Interest Accrual per Unit..........................................................  $  .11727
ESTIMATED CURRENT RETURN BASED ON PUBLIC OFFERING PRICE <F1><F3><F4><F5>.......................................       4.11%
ESTIMATED LONG-TERM RETURN <F3><F4><F5>........................................................................       4.21%
Initial Distribution (April 1994)..............................................................................  $    3.28
ESTIMATED NORMAL DISTRIBUTION PER UNIT <F5>....................................................................  $    3.52
PURCHASED INTEREST <F6>........................................................................................  $    5.02

Trustee's Annual Fee <F1>.............. $.98 per $1,000 principal amount of
                                        Bonds
Record and Computation Dates........... FIRST day of each month
DISTRIBUTION DATES..................... FIFTEENTH DAY OF EACH MONTH COMMENCING
                                        APRIL 15, 1994

<FN>
<F1> During the first year the Trustee will reduce its fee by approximately
     $.68 per Unit (which amount is the estimated interest to be earned per
     Unit prior to the expected delivery dates for the "when, as and if
     issued" Bonds included in this Trust). Should such estimated interest
     exceed such amount, the Trustee will reduce its fee up to its annual fee.
     After the first year, the Trustee's fee will be that amount indicated
     above. Estimated annual interest income per Unit will be increased to
     $44.30. Estimated Annual Expense per Unit (excluding insurance) will be
     increased to $2.08; and estimated net annual interest income per Unit
     will remain the same as shown. See "Estimated Current Returns and
     Estimated Long-Term Returns." Based on the outstanding principal amount
     of Securities as of the Date of Deposit, the Trustee's annual fee would
     be $2,940.
<F2> Excluding insurance costs.
<F3> The Estimated Current Return and Estimated Long-Term Return are increased
     for transactions entitled to a reduced sales charge. See "Unitholder
     Explanations--Public Offering--General".
<F4> The Estimated Current Return is calculated by dividing the estimated net
     annual interest income per Unit by the Public Offering Price. The
     estimated net annual interest income per Unit will vary with changes in
     fees and expenses of the Trustee and the Evaluator and with the principal
     prepayment, redemption, maturity, exchange or sale of Securities while
     the Public Offering Price will vary with changes in the offering price of
     the underlying Securities and with changes in the Purchased Interest;
     therefore, there is no assurance that the present Estimated Current
     Return indicated above will be realized in the future. The Estimated
     Long-Term Return is calculated using a formula which <F1>takes into
     consideration, and determines and factors in the relative weightings of,
     the market values, yields (which takes into account the amortization of
     premiums and the accretion of discounts) and estimated retirements of all
     of the Securities in the Trust and <F2>takes into account the expenses
     and sales charge associated with each Trust Unit. Since the market values
     and estimated retirements of the Securities and the expenses of the Trust
     will change, there is no assurance that the present Estimated Long-Term
     Return as indicated above will be realized in the future. The Estimated
     Current Return and Estimated Long-Term Return are expected to differ
     because the calculation of the Estimated Long-Term Return reflects the
     estimated date and amount of principal returned while the Estimated
     Current Return calculation includes only net annual interest income and
     Public Offering Price.
<F5> These figures are based on estimated per Unit cash flows. Estimated cash
     flows will vary with changes in fees and expenses, with changes in
     current interest rates and with the principal prepayment, redemption,
     maturity, call, exchange or sale of the underlying Securities. The
     estimated cash flows for this Series are set forth under "Estimated Cash
     Flows to Unitholders".
<F6> See "Unitholder Explanations--Purchased and Accrued Interest".
</TABLE>
 <PAGE>
            Florida IM-IT Intermediate Laddered Maturity Series 6           37

<TABLE>
FLORIDA IM-IT INTERMEDIATE LADDERED MATURITY SERIES 6
(155TH INSURED MULTI-SERIES)
PORTFOLIO AS OF FEBRUARY 24, 1994
<CAPTION>

                                                                                                              OFFERING
                                                                                                              PRICE TO
                                                                                                              FLORIDA
                                                                                                              IM-IT
                                                                                                              INTERMEDIATE
              NAME OF ISSUER, TITLE, INTEREST RATE AND                                                        LADDERED
AGGREGATE     MATURITY DATE OF EITHER BONDS DEPOSITED OR                                  REDEMPTION          MATURITY
PRINCIPAL<F1> BONDS CONTRACTED FOR<F1><F5>                                     RATING<F2> FEATURE<F3>         TRUST<F4>
<S>           <C>                                                                 <C>     <C>                 <C>
$    600,000  City of Tampa, Florida, Allegany Health System Revenue Bonds
                (St. Joseph's Hospital Inc. Issue) Series 1993 (MBIA Insured)
                #4.30% Due 12/1/2000.........................................     AAA                         $     598,740
     600,000  Pensacola, Florida, Gas System Revenue Refunding Bonds, Series
                1994 (AMBAC Indemnity Insured)**
                #4.25% Due 12/1/2001.........................................     AAA                               592,494
     600,000  State of Florida, Department of Environmental Protection,
                Preservation 2000 Revenue Bonds, Series 1994A (MBIA Insured)
                4.50% Due 7/1/2002...........................................     AAA                               598,098
     600,000  City of Casselberry, Florida, Utility System Improvement
                Refunding Revenue Bonds, Series 1994 (FGIC Insured)**
                #4.50% Due 10/1/2003.........................................     AAA                               593,052
     600,000  School District of Dade County, Florida, General Obligation
                School Bonds, Series 1994 (MBIA Insured)
                #4.60% Due 8/1/2004..........................................     AAA                               592,476
                                                                                                              $   2,974,860
$  3,000,000
</TABLE>

All of the Bonds in the portfolio are insured by one of the Preinsured Bond
Insurers as indicated in the Bond name. See "Unitholder
Explanations--Insurance on the Bonds in the Insured Trusts".

For an explanation of the footnotes used on this page, see "Notes to
Portfolios".
 <PAGE>
38                     Pennsylvania IM-IT-- Series 182

PENNSYLVANIA IM-IT TRUST

      GENERAL. The Pennsylvania IM-IT Trust consists of 9 issues of
Securities. One of the Bonds in the Pennsylvania IM-IT Trust is a general
obligation of the governmental entity issuing it and is backed by the taxing
power thereof. The remaining issues are payable from the income of a specific
project or authority and are not supported by the issuer's power to levy
taxes. These issues are divided by purpose of issues (and percentage of
principal amount to total Pennsylvania IM-IT Trust) as follows: Water and
Sewer, 2 (32%); Health Care, 3 (30%); General Purpose, 2 (20%); Retail
Electric/Gas, 1 (16%) and General Obligations, 1 (2%). No Bond issue has
received a provisional rating.

     SPECIAL CONSIDERATIONS. Investors should be aware of certain factors that
might affect the financial conditions of the Commonwealth of Pennsylvania.
Pennsylvania historically has been identified as a heavy industry state
although that reputation has changed recently as the industrial composition of
the Commonwealth diversified when the coal, steel and railroad industries
began to decline. The major new sources of growth in Pennsylvania are in the
service sector, including trade, medical and the health services, education
and financial institutions. Pennsylvania's agricultural industries are also an
important component of the Commonwealth's economic structure, accounting for
more than $3.6 billion in crop and livestock products annually, while
agribusiness and food related industries support $38 billion in economic
activity annually.

     Non-agricultural employment in the Commonwealth declined by 5.1 percent
during the recessionary period from 1980 to 1983. In 1984, the declining trend
was reversed as employment grew by 2.9 percent over 1983 levels. From 1983 to
1990, Commonwealth employment continued to grow each year, increasing an
additional 14.3 percent. For the last two years, unemployment in the
Commonwealth has declined 1.9 percent. The growth in employment experienced in
Pennsylvania is comparable to the growth in employment in the Middle Atlantic
Region which has occurred during this period.

     Back to back recessions in the early 1980's reduced the manufacturing
sector's employment levels moderately during 1980 and 1981, sharply during
1982, and even further in 1983. Non-manufacturing employment has increased
steadily since 1980 to its 1992 level of 81.3 percent of total Commonwealth
employment. Consequently, manufacturing employment constitutes a diminished
share of total employment within the Commonwealth. Manufacturing, contributing
18.7 percent of 1992 non-agricultural employment, has fallen behind both the
services sector and the trade sector as the largest single source of
employment within the Commonwealth. In 1992 the services sector accounted for
29.3 percent of all non-agricultural employment while the trade sector
accounted for 22.7 percent.

     From 1983 to 1989, Pennsylvania's annual average unemployment rate
dropped from 11.8 percent to 4.5 percent, falling below the national rate in
1986 for the first time in over a decade. Pennsylvania's annual average
unemployment rate remained below the national average from 1986 until 1990.
Slower economic growth caused the unemployment rate in the Commonwealth to
rise to 6.9 percent in 1991 and 7.5 percent in 1992. In April 1993 the
seasonally adjusted unemployment rate for the Commonwealth was 6.6 percent
compared to 7.0 percent for the United States.

     It should be noted that the creditworthiness of obligations issued by
local Pennsylvania issuers may be unrelated to the creditworthiness of
obligations issued by the Commonwealth of Pennsylvania, and there is no
obligation on the part of the Commonwealth to make payment on such local
obligations in the event of default.

     Financial information for the General Fund is maintained on a budgetary
basis of accounting. A budgetary basis of accounting is used for the purpose
of ensuring compliance with the enacted operating budget and is governed by
applicable statutes of the Commonwealth and by administrative procedures. The
Commonwealth also prepares annual financial statements in accordance with
generally accepted accounting principles ("GAAP"). The budgetary basis
financial information maintained by the Commonwealth to monitor and enforce
budgetary control is adjusted at fiscal year-end to reflect appropriate
accruals for financial reporting in conformity with GAAP.

     Fiscal 1991 Financial Results. GAAP Basis: During fiscal 1991 the General
Fund experienced an $861.2 million operating deficit resulting in a fund
balance deficit of $980.9 million at June 30, 1991. The operating deficit was
a consequence of the effect of a national recession that restrained budget
revenues and pushed expenditures above budgeted levels. At June 30, 1991, a
negative unreserved-undesignated balance of $1,146.2 million was reported.
During fiscal 1991 the balance in the Tax Stabilization Reserve Fund was used
to maintain vital state spending and only a minimal balance remains in that
fund.
 <PAGE>
                       Pennsylvania IM-IT-- Series 182                      39

     Budgetary Basis: A deficit of $453.6 million was recorded by the General
Fund at June 30, 1991. The deficit was a consequence of higher than budgeted
expenditures and lower than estimated revenues during the fiscal year brought
about by the national economic recession that began during the fiscal year. A
number of actions were taken throughout the fiscal year by the Commonwealth to
mitigate the effects of the recession on budget revenues and expenditures.
Actions taken, together with normal appropriation lapses, produced $871
million in expenditure reductions and revenue increases for the fiscal year.
The most significant of these actions were a $214 million transfer from the
Pennsylvania Industrial Development Authority, a $134 million transfer from
the Tax Stabilization Reserve Fund, and a pooled financing program to match
federal Medicaid funds replacing $145 million of state funds.

     Fiscal 1992 Financial Results. GAAP Basis: During fiscal 1992 the General
Fund reported a $1.1 billion operating surplus. This operating surplus was
achieved through legislated tax rate increases and tax base broadening
measures enacted in August 1991 and by controlling expenditures through
numerous cost reduction measures implemented throughout the fiscal year. As a
result of the fiscal 1992 operating surplus, the fund balance has increased to
$87.5 million and the unreserved-undesignated deficit has dropped to $138.6
million from its fiscal 1991 level of $1,146.2 million.

     Budgetary Basis: Eliminating the budget deficit carried into fiscal 1992
from fiscal 1991 and providing revenues for fiscal 1992 budgeted expenditures
required tax revisions that are estimated to have increased receipts for the
1992 fiscal year by over $2.7 billion. Total revenues for the fiscal year were
$14,516.8 million, a $2,654.5 million increase over cash revenues during
fiscal 1991. Originally based on forecasts for an economic recovery, the
budget revenue estimates were revised downward during the fiscal year to
reflect continued recessionary economic activity. Largely due to the tax
revisions enacted for the budget, corporate tax receipts totalled $3,761.2
million, up from $2,656.3 million in fiscal 1991, sales tax receipts increased
by $302 million to $4,499.7 million, and personal income tax receipts totalled
$4,807.4 million, an increase of $1,443.8 million over receipts in fiscal
1991.

     As a result of the lowered revenue estimate during the fiscal year,
increased emphasis was placed on restraining expenditure growth and reducing
expenditure levels. A number of cost reductions were implemented during the
fiscal year and contributed to $296.8 million of appropriation lapses. These
appropriation lapses were responsible for the $8.8 million surplus at fiscal
year-end, after accounting for the required ten percent transfer of the
surplus to the Tax Stabilization Reserve Fund.

     Spending increases in the fiscal 1992 budget were largely accounted for
by increases for education, social services and corrections programs.
Commonwealth funds for the support of public schools were increased by 9.8
percent to provide a $438 million increase to $4.9 billion for fiscal 1992.
The fiscal 1992 budget provided additional funds for basic and special
education and included provisions designed to help restrain the annual
increase of special education costs, an area of recent rapid cost increases.
Child welfare appropriations supporting county operated child welfare programs
were increased $67 million, more than 31.5 percent over fiscal 1991. Other
social service areas such as medical and cash assistance also received
significant funding increases as costs have risen quickly as a result of the
economic recession and high inflation rates of medical care costs. The costs
of corrections programs, reflecting the marked increase in the prisoner
population, increased by 12 percent. Economic development efforts, largely
funded from bond proceeds in fiscal 1991, were continued with General Fund
appropriations for fiscal 1992.

     The budget included the use of several Medicaid pooled financing
transactions. These pooling transactions replaced $135 million of Commonwealth
funds, allowing total spending under the budget to increase by an equal
amount.

     Fiscal 1993 Budget. The latest budget estimates project expenditures from
Commonwealth funds for fiscal 1993 to be $13.857 billion, representing only a
$5.2 million increase over fiscal 1992 expenditures. The fiscal 1993 budget is
balanced within the official revenue estimate and a planned draw-down of the
$8.8 million beginning budgetary basis surplus carried forward from Fiscal
1992. The Fiscal 1993 budget was amended on May 28, 1993, through the
enactment of $165.1 million of supplemental appropriations. This small
increase in expenditures is the result of revenues being constrained by a
personal income tax rate reduction effective July 1, 1992, a low rate of
economic growth, higher tax refund reserves to cushion against adverse
decisions on pending tax litigations, and the receipt of Federal funds for
expenditures previously paid out of Commonwealth funds. The amended fiscal
1993 budget restored partial funding for private educational institutions that
normally receive state appropriations but whose appropriations were
item-vetoed by the Governor from the originally adopted fiscal 1993 budget.
Also restored by the amended budget were certain grants to the counties to
help pay operating costs of the local judicial system.
 <PAGE>
40                     Pennsylvania IM-IT-- Series 182

     Commonwealth revenue sources are estimated for the fiscal 1993 budget to
total $14.592 billion, a $74.9 million increase over actual fiscal 1992
revenues, representing an increase of approximately one-half of one percent.
The projected low revenue growth for fiscal 1993 is caused by the
Commonwealth's expectation that current weak growth in employment, consumer
income, and retail sales will continue, and by the reduction in the personal
income tax rate from 3.1 percent to 2.8 percent on July 1, 1992. In addition,
tax refund reserves were increased $209.0 million to $548.0 million for fiscal
1993 to allow for potential tax refunds that might be payable from any adverse
judicial decision in a number of pending tax litigations. In January 1993, the
refund estimate was reduced to $530 million.

     Through May 1993, fiscal 1993 total General Fund revenue collections were
$7.1 million (0.05 percent) above estimate, as fiscal year-to-date shortfalls
in receipts of corporation taxes ($30.3 million) and personal income tax
($37.2 million) were offset mainly by above estimate sales tax and
miscellaneous revenue collections.

     Fiscal 1994 Budget (Budgetary Basis). The enacted 1994 fiscal year budget
provides for $14.999 billion of appropriations of Commonwealth funds. The
largest increase in appropriations is for the Department of Public
Welfare--$235 million--to meet the increasing costs of medical care and rising
case loads. Other large increases are education--$196 million--including $130
million to increase state educational subsidies for the most needy school
districts and $104 million for correctional institutions to pay operating
costs and lease payments for five new prisons and to expand the capacity of
two existing facilities.

     The budget estimates revenue growth of 4.0 percent over revised fiscal
1993 estimates. The revenue estimate is based on an expectation of continued
economic recovery, but at a slow rate. Sale tax receipts are projected to rise
5.1 percent over the fiscal 1993 estimate while personal income tax receipts
are projected to increase by 2.4 percent, a rate that is low because of the
tax rate reduction in July 1992.

     All outstanding general obligation bonds of the Commonwealth are rated
AA-by S&P and A1 by Moody's.

     Any explanation concerning the significance of such ratings must be
obtained from the rating agencies. There is no assurance that any ratings will
continue for any period of time or that they will not be revised or withdrawn.

     The City of Philadelphia is the largest city in the Commonwealth with an
estimated population of 1,585,577 according to the 1990 Census. Philadelphia
functions both as a city and a first-class county for the purpose of
administering various governmental programs.

     Legislation providing for the establishment of the Pennsylvania
Intergovernmental Cooperation Authority ("PICA") to assist first class cities
in remedying fiscal emergencies was enacted by the General Assembly and
approved by the Governor in June 1991. PICA is designed to provide assistance
through the issuance of funding debt to liquidate budget deficits and to make
factual findings and recommendations to the assisted city concerning its
budgetary and fiscal affairs. An intergovernmental cooperation agreement
between Philadelphia and PICA was approved by City Counsel on January 3, 1992,
and approved by the PICA Board and signed by the Mayor on January 8, 1992. At
this time, Philadelphia is operating under a five-year fiscal plan approved by
PICA on April 6, 1992. Full implementation of the five-year plan was delayed
due to labor negotiations that were not completed until October 1992, three
months after the expiration of the old labor contracts. The terms of the new
labor contracts are estimated to cost approximately $144.0 million more than
what was budgeted in the original five-year plan. The Mayor and his
Administration have amended the plan to bring it back in balance and their
plan is presently being considered by PICA and City Council.

     In June 1992, PICA issued $474,555,000 of its Special Tax Revenue Bonds
to provide financial assistance to Philadelphia and to liquidate the
cumulative General Fund balance deficit. In March 1993, Philadelphia filed an
amended five-year plan with PICA, in which the General Fund balance deficit
for the Fiscal Year ended June 30, 1993, is projected to be $6.6 million. The
fiscal 1994 budget, approved by City Council, projects no deficit and a
balanced budget for the year ending June 30, 1994. PICA approved the fiscal
1994 budget plan on April 14, 1993.

     As of the date hereof, the ratings on the City's long-term obligations
supported by payments from the City's General Fund are rated Ba by Moody's and
B by S&P. Any explanation concerning the significance of such ratings must be
obtained from the rating agencies. There is no assurance that any ratings will
continue for any period of time or that they will not be revised or withdrawn.

     The foregoing information constitutes only a brief summary of some of the
financial difficulties which may impact certain issuers of bonds and does not
purport to be a complete or exhaustive description of all adverse conditions
to
 <PAGE>
                       Pennsylvania IM-IT-- Series 182                      41
which the issuers of the Bonds in the Pennsylvania IM-IT Trust are subject.
Additionally, many factors including national economic, social and
environmental policies and conditions, which are not within the control of the
issuers of Bonds, could have an adverse impact on the financial condition of
the State and various agencies and political subdivisions located in the
State. The Sponsor is unable to predict whether or to what extent such factors
or other factors may affect the issuers of Bonds, the market value or
marketability of the Bonds or the ability of the respective issuers of the
Bonds acquired by the Pennsylvania IM-IT Trust to pay Interest on or principal
of the Bonds.

     TAX STATUS. For a discussion of the Federal tax status of income earned
on Pennsylvania IM-IT Trust Units, see "Other Matters--Federal Tax Status".

     In the opinion of Saul, Ewing, Remick & Saul, counsel to the Fund for
Pennsylvania tax matters, under existing law:
     (1)   Units evidencing fractional undivided interest in the Pennsylvania
        IM-IT Trust, which are represented by obligations issued by the
        Commonwealth of Pennsylvania, any public authority, commission, board
        or other agency created by the Commonwealth of Pennsylvania, any
        political subdivision of the Commonwealth of Pennsylvania or any
        public authority created by any such political subdivision are not
        taxable under any of the personal property taxes presently in effect
        in Pennsylvania;
     (2)   distributions of interest income to Unitholders are not subject to
        personal income tax under the Pennsylvania Tax Reform Code of 1971;
        nor will such interest be taxable under the Philadelphia School
        District Investment Income Tax imposed on Philadelphia resident
        individuals;
     (3)   a Unitholder may have a taxable event under the Pennsylvania state
        and local income taxes referred to in the preceding paragraph upon the
        redemption or sale of his Units but not upon the disposition of any of
        the Securities in the Pennsylvania IM-IT Trust to which the
        Unitholder's Units relate;
     (4)   Units are subject to Pennsylvania inheritance and estate taxes;
     (5)   a Unitholder which is a corporation may have a taxable event under
        the Pennsylvania Corporate Net Income Tax when it redeems or sells its
        Units. Interest income distributed to Unitholders which are
        corporations is not subject to Pennsylvania Corporate Net Income Tax
        or Mutual Thrift Institutions Tax. However, banks, title insurance
        companies and trust companies may be required to take the value of the
        Units into account in determining the taxable value of their Shares
        subject to Shares Tax;
     (6)   Under Act No. 68 of December 3, 1993, gains derived by the Fund
        from the sale, exchange or other disposition of Bonds may be subject
	to Pennsylvannia personal or corporate income taxes. Those gains which
	are distributed by the Fund to Unitholders who are individual will be
	subject to Pennsylvannia Personal Income Tax and, for residents of
	Philadelphia, to Philadelphia School District Investment Income Tax.
	For Unitholders which are corporations, the distributed gains will be
	subject to Corporate Net Income Tax or Mutual Thrift Institutions Tax.
	Gains which are not distributed by the Fund will nevertheless be 
	taxable to Unitholders if derived by the Fund from the sale, exchange
	or other disposition of Bonds issued on or after February 1, 1994.
	Gains which are not distributed by the Fund will remain nontaxable
	to Unitholders if derived by the Fund from the sale, exchange or 
	other disposition of Bonds issued prior to February 1, 1994. However,
	for gains from the sale, exchange or other disposition of these Bonds 
	to be taxable under the Philadelphia School District Investment Income
	Tax, the Bonds must be held for six months or less;
     (7)   any proceeds paid under the insurance policy issued to the Trustee
        or obtained by the issuers of the Bonds with respect to the Bonds
        which represent maturing interest on defaulted obligations held by the
        Trustee will be excludable from Pennsylvania gross income if, and to
        the same extent as, such interest would have been so excludable if
        paid by the issuer of the defaulted obligations; and
     (8)   The Fund is not taxable as a corporation under Pennsylvania tax
        laws applicable to corporations.

	On December 3, 1993, change to Pennsylvannia law affecting taxation
of income and gains from the sale of Commonwealth of Pennsylvannia and local
obligations were enacted. Among these changes was the repeal of the exemption
from tax of gains realized upon the sale or other disposition of such 
obligations. The Pennsylvannia Department of Revenue has not issued any 
regulations or other guidance concerning these changes. The opinions expressed
above are based on our analysis of the law but are subject to modification 
upon review of regulations or other guidance that may be issued by the 
Department of Revenue.

     In rendering its opinion, Saul, Ewing, Remick & Saul has not, for timing
reasons, made an independent review of proceedings related to the issuance of
the Bonds. It has relied on Van Kampen Merritt Inc. for assurance that the
Bonds have been issued by the Commonwealth of Pennsylvania or by or on behalf
of municipalities or other governmental agencies within the Commonwealth.
 <PAGE>
42                     Pennsylvania IM-IT-- Series 182

<TABLE>
<CAPTION>
PER UNIT INFORMATION:
CALCULATION OF ESTIMATED NET ANNUAL UNIT INCOME <F1>
<S>                                                                                                              <C>
      Estimated Annual Interest Income per Unit................................................................  $  52.52
      Less: Estimated Annual Expense per Unit <F2>.............................................................  $   1.94
      Less: Annual Premium on Portfolio Insurance per Unit.....................................................     --
      Estimated Net Annual Interest Income per Unit............................................................  $  50.58
CALCULATION OF ESTIMATED INTEREST EARNINGS PER UNIT:
      Estimated Net Annual Interest Income per Unit............................................................  $  50.58
      Divided by 12............................................................................................  $   4.22
Estimated Daily Rate of Net Interest Accrual per Unit..........................................................  $ .14050
ESTIMATED CURRENT RETURN BASED ON PUBLIC OFFERING PRICE <F1><F3><F4><F5>.......................................      5.06%
ESTIMATED LONG-TERM RETURN <F3><F4><F5>........................................................................      5.12%
Initial Distribution (April 1994)..............................................................................  $   3.93
ESTIMATED NORMAL DISTRIBUTION PER UNIT <F5>....................................................................  $   4.22
PURCHASED INTEREST <F6>........................................................................................  $   7.93

Trustee's Annual Fee <F1>.............. $.98 per $1,000 principal amount of
                                        Bonds
Record and Computation Dates........... FIRST day of each month
DISTRIBUTION DATES..................... FIFTEENTH DAY OF EACH MONTH COMMENCING
                                        APRIL 15, 1994

<FN>
<F1> During the first year the Trustee will reduce its fee by approximately
     $.10 per Unit (which amount is the estimated interest to be earned per
     Unit prior to the expected delivery dates for the "when, as and if issued"
     Bonds included in this Trust). Should such estimated interest exceed such
     amount, the Trustee will reduce its fee up to its annual fee. After the
     first year, the Trustee's fee will be that amount indicated above.
     Estimated annual interest income per Unit will be increased to $52.62.
     Estimated Annual Expense per Unit (excluding insurance) will be increased
     to $2.04; and estimated net annual interest income per Unit will remain
     the same as shown. See "Estimated Current Returns and Estimated Long-Term
     Returns." Based on the outstanding principal amount of Securities as of
     the Date of Deposit, the Trustee's annual fee would be $2,950.
<F2> Excluding Insurance costs.
<F3> The Estimated Current Return and Estimated Long-Term Return are increased
     for transactions entitled to a reduced sales charge. See "Unitholder
     Explanations--Public Offering--General".
<F4> The Estimated Current Return is calculated by dividing the estimated net
     annual interest income per Unit by the Public Offering Price. The
     estimated net annual interest income per Unit will vary with changes in
     fees and expenses of the Trustee and the Evaluator and with the principal
     prepayment, redemption, maturity, exchange or sale of Securities while
     the Public Offering Price will vary with changes in the offering price of
     the underlying Securities and with changes in the Purchased Interest;
     therefore, there is no assurance that the present Estimated Current
     Return indicated above will be realized in the future. The Estimated
     Long-Term Return is calculated using a formula which <F1>takes into
     consideration, and determines and factors in the relative weightings of,
     the market values, yields (which takes into account the amortization of
     premiums and the accretion of discounts) and estimated retirements of all
     of the Securities in the Trust and <F2>takes into account the expenses
     and sales charge associated with each Trust Unit. Since the market values
     and estimated retirements of the Securities and the expenses of the Trust
     will change, there is no assurance that the present Estimated Long-Term
     Return as indicated above will be realized in the future. The Estimated
     Current Return and Estimated Long-Term Return are expected to differ
     because the calculation of the Estimated Long-Term Return reflects the
     estimated date and amount of principal returned while the Estimated
     Current Return calculation includes only net annual interest income and
     Public Offering Price.
<F5> These figures are based on estimated per Unit cash flows. Estimated cash
     flows will vary with changes in fees and expenses, with changes in
     current interest rates and with the principal prepayment, redemption,
     maturity, call, exchange or sale of the underlying Securities. The
     estimated cash flows for this Series are set forth under "Estimated Cash
     Flows to Unitholders".
<F6> See "Unitholder Explanations--Purchased and Accrued Interest".
</TABLE>
 <PAGE>
                       Pennsylvania IM-IT-- Series 182                      43

<TABLE>
PENNSYLVANIA INSURED MUNICIPALS INCOME TRUST
SERIES 182 (155TH INSURED MULTI-SERIES)
PORTFOLIO AS OF FEBRUARY 24, 1994
<CAPTION>

                                                                                                              OFFERING
                                                                                                              PRICE TO
              NAME OF ISSUER, TITLE, INTEREST RATE AND                                                        PENNSYLVANIA
AGGREGATE     MATURITY DATE OF EITHER BONDS DEPOSITED OR                                  REDEMPTION          IM-IT
PRINCIPAL<F1> BONDS CONTRACTED FOR<F1><F5>                                     RATING<F2> FEATURE<F3>         TRUST<F4>
<S>           <C>                                                                 <C>     <C>                 <C>
$    100,000  Alleghany County, Pennsylvania, Hospital Development Authority,
                Hospital Revenue Refunding Bonds (Magee-Womens Hospital)
                Series 1992 (FGIC Insured)                                                2002 @ 102
                #6.00% Due 10/1/2013.........................................     AAA     2009 @ 100 S.F.     $     103,253
     100,000  The Philadelphia Municipal Authority, Philadelphia,
                Pennsylvania, Lease Revenue Refunding Bonds, Series 1993C
                (FGIC Insured)                                                            2003 @ 102
                #5.25% Due 4/1/2018..........................................     AAA     2008 @ 100 S.F.            94,987
      50,000  County of Berks, Pennsylvania, General Obligation Bonds, Series
                1992 (FGIC Insured)
                #0.00% Due 11/15/2018........................................     AAA                                12,230<F6>
     410,000  Bethlehem Authority, Northampton and Lehigh Counties,
                Pennsylvania, Water Revenue Refunding Bonds, Series 1994
                (MBIA Insured)**                                                          2004 @ 102
                #5.20% Due 11/15/2021........................................     AAA     2018 @ 100 S.F.           386,335
     550,000  Meadville Area Water Authority, Crawford County, Pennsylvania,
                Water Revenue Refunding Bonds, Series 1994 (FSA Insured)                  2004 @ 100
                #5.35% Due 7/1/2022..........................................     AAA     2015 @ 100 S.F.           529,628
     500,000  Pennsylvania Intergovernmental Cooperation Authority, Special
                Tax Revenue Bonds (City of Philadelphia Funding Program)
                Series 1993 (MBIA Insured)                                                2003 @ 100
                #5.625% Due 6/15/2023........................................     AAA     2016 @ 100 S.F.           497,140
     500,000  Dauphin County General Authority (Pennsylvania) Hospital
                Revenue Bonds, HAPSCO Group, Inc. Tax-Exempt Loan Program
                (The Western Pennsylvania Hospital Project) Series 1993A
                (MBIA Insured)                                                            2003 @ 102
                #5.50% Due 7/1/2023..........................................     AAA     2017 @ 100 S.F.           488,285
     300,000  Montgomery County Higher Education and Health Authority
                (Pennsylvania) Hospital Revenue Bonds, Series 1994A (Abington
                Memorial Hospital) AMBAC Indemnity Insured                                2004 @ 102
                #5.125% Due 6/1/2024.........................................     AAA     2015 @ 100 S.F.           278,013
     500,000  Lehigh County Industrial Development Authority, Pollution
                Control Revenue Refunding Bonds (Pennsylvania Power & Light
                Company Project) Series 1994A (MBIA Insured)
                #5.50% Due 2/15/2027.........................................    YAAA     2004 @ 102                487,690
$  3,010,000                                                                                                   $  2,877,561
</TABLE>
    

All of the Bonds in the portfolio are insured by one of the Preinsured Bond
Insurers as indicated in the Bond name. See "Unitholder
Explanations--Insurance on the Bonds in the Insured Trusts".

For an explanation of the footnotes used on this page, see "Notes to
Portfolios".
 <PAGE>
44                           Notes to Portfolios
   
NOTES TO PORTFOLIOS:
AS OF THE DATE OF DEPOSIT: FEBRUARY 24, 1994

(1)  All Securities are represented by "regular way" or "when issued"
     contracts for the performance of which an irrevocable letter of credit,
     obtained from an affiliate of the Trustee, has been deposited with the
     Trustee. At the Date of Deposit, Securities may have been delivered to
     the Sponsor pursuant to certain of these contracts; the Sponsor has
     assigned to the Trustee all of its right, title and interest in and to
     such Securities. Contracts to acquire Securities were entered into during
     the period from October 1, 1993 to February 24, 1994. These Securities
     have expected settlement dates ranging from February 24, 1994 to March
     17, 1994 (see "Unitholder Explanations").
    
(2)  All ratings are by Standard & Poor's Corporation unless otherwise
     indicated. "*" indicates that the rating of the Bond is by Moody's
     Investors Service, Inc. The ratings represent the latest published
     ratings by the respective ratings agency or, if not published, represent
     private letter ratings or those ratings expected to be published by the
     respective ratings agency. "Y" indicates that such rating is contingent
     upon physical receipt by the respective ratings agency of a policy of
     insurance obtained by the issuer of the bonds involved and issued by the
     Preinsured Bond Insurer named in the bond's title. A commitment for
     insurance in connection with these bonds has been issued by the
     Preinsured Bond Insurer named in the bond's title. "N/R" indicates that
     the applicable rating service did not provide a rating for that
     particular Security. For a brief description of the rating symbols and
     their related meanings, see "Other Matters-- Description of Securities
     Ratings".
(3)  There is shown under this heading the year in which each issue of Bonds
     is initially or currently callable and the call price for that year. Each
     issue of Bonds continues to be callable at declining prices thereafter
     (but not below par value) except for original issue discount bonds which
     are redeemable at prices based on the issue price plus the amount of
     original issue discount accreted to redemption date plus, if applicable,
     some premium, the amount of which will decline in subsequent years.
     "S.F." indicates a sinking fund is established with respect to an issue
     of Bonds. Redemption pursuant to call provisions generally will, and
     redemption pursuant to sinking fund provisions may, occur at times when
     the redeemed bonds have an offering side valuation which represents a
     premium over par. Certain Bonds may be subject to redemption without
     premium prior to the date shown pursuant to extraordinary optional or
     mandatory redemptions if certain events occur. Single family mortgage
     revenue bonds and housing authority bonds are most likely to be called
     subject to such provisions, but other bonds may have similar call
     features. Notwithstanding any provisions to the contrary, certain bond
     issuers have in the past and others may in the future attempt to redeem
     Bonds prior to their initially scheduled call dates and at prices which
     do not include any premiums. For a general discussion of certain of these
     events, see "Unitholder Explanations--Bond Redemptions". To the extent
     that the Securities were deposited in a Trust at a price higher than the
     price at which they are redeemed, this will represent a loss of capital
     when compared with the original Public Offering Price of the Units.
     Conversely, to the extent that the Bonds were acquired at a price lower
     than the redemption price, this will represent an increase in capital
     when compared with the original Public Offering Price of the Units.
     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 Unitholders the principal amount and any
     premium received on such redemption. The Estimated Current Return and
     Estimated Long-Term Return in this event may be affected by such
     redemptions. For the Federal tax effect on Unitholders of such
     redemptions and resultant distributions, see paragraph <F2>under "Other
     Matters--Federal Tax Status".
(4)  Evaluation of Securities is made on the basis of current offering prices
     for the Securities. The offering prices are greater than the current bid
     prices of the Securities which is the basis on which Unit value is
     determined for purposes of redemption of Units (see "Unitholder
     Explanations--Public Offering--Offering Price").
   
(5)  Other information regarding the Bonds in each Trust, as of the Date of
     Deposit, is as follows:
<TABLE>
<CAPTION>

                                          ANNUAL                      PROFIT
                                         INSURANCE      COST TO     (LOSS) TO   ANNUAL INTEREST   BID SIDE EVALUATION
TRUST                                      COST         SPONSOR      SPONSOR    INCOME TO TRUST        OF BONDS
<S>                                         <C>      <C>            <C>         <C>               <C>
IM-IT.................................      --       $   9,390,018  $   13,133  $       530,375   $       9,329,844
IM-IT Short Intermediate..............      --       $   5,959,558  $   25,481  $       242,025   $       5,939,825
Florida IM-IT Intermediate
 Laddered Maturity....................      --       $   2,971,230  $    3,630  $       132,900   $       2,952,000
Pennsylvania IM-IT....................      --       $   2,888,124  $  (10,563) $       160,495   $       2,854,288
</TABLE>

     The Sponsor may have entered into contracts which hedge interest rate
     fluctuations on certain Bonds in certain Portfolios. The cost of any such
     contracts and the corresponding gain or loss is included in the Cost to
     Sponsor.
 <PAGE>
                             Notes to Portfolios                            45

     Certain Securities in the Fund, if any, marked by a double asterisk (**),
     have been purchased on a "when, as and if issued" or "delayed delivery"
     basis. Interest on these Securities begins accruing to the benefit of
     Unitholders on their respective dates of delivery. Delivery is expected
     to take place at various dates after the First Settlement Date as
     follows:
<TABLE>
<CAPTION>

                                            PERCENT OF
                                        AGGREGATE PRINCIPAL     RANGE OF DAYS SUBSEQUENT
TRUST                                         AMOUNT            TO FIRST SETTLEMENT DATE
<S>                                             <C>                   <C>
IM-IT...............................            10%                      6 days
IM-IT Short Intermediate............            45%                   6 to 13 days
Florida IM-IT Intermediate
 Laddered Maturity..................            40%                      14 days
Pennsylvania IM-IT..................            14%                      5 days
</TABLE>

     On the Date of Deposit, the offering side evaluations of the Securities
     in the IM-IT, IM-IT Short Intermediate, Florida IM-IT Intermediate
     Laddered Maturity and Pennsylvania IM-IT Trusts were higher than the bid
     side evaluations of such Securities by 0.74%, 0.75%, 0.76% and 0.77%,
     respectively, of the aggregate principal amounts of such Securities.
     "#" indicates that such Bond was issued at an original issue discount.
     The tax effect of Bonds issued at an original issue discount is described
     in "Other Matters--Federal Tax Status".
(6)  This Bond has been purchased at a deep discount from the par value
     because there is little or no stated interest income thereon. Bonds which
     pay no interest are normally described as "zero coupon" bonds. Over the
     life of bonds purchased at a deep discount the value of such bonds will
     increase such that upon maturity the holders of such bonds will receive
     100% of the principal amount thereof. Approximately 4%, 8% and 2% of the
     aggregate principal amount of the Securities in the IM-IT, IM-IT Short
     Intermediate Trust and Pennsylvania IM-IT Trust, respectively, are "zero
     coupon" bonds, respectively.
    
(7)  The issuer of this Bond has sold or reserved the right to sell to third
     parties all or a portion of its right to call the Bond in accordance with
     the redemption provisions of the Bond. See "Unitholder
     Explanations--Settlement of Bonds in the Trusts--Bond Redemptions."
 <PAGE>
46                               Underwriting

     UNDERWRITING. The Underwriters named below have severally purchased Units
in the following respective amounts from the Sponsor.
   
<TABLE>
<CAPTION>
      NAME                                         ADDRESS                                                    IM-IT UNITS
<S>                                         <C>                                                                   <C>
A. G. Edwards & Sons, Inc.                  One North Jefferson Avenue, St. Louis, Missouri 63103                 4,000
Van Kampen Merritt Inc.                     One Parkview Plaza, Oakbrook Terrace, Illinois 60181                  1,605
Edward D. Jones & Co.                       201 Progress Parkway, Maryland Heights, Missouri 63043                  500
Kemper Securities, Inc.                     77 West Wacker Drive, 28th Floor, Chicago, Illinois 60601               500
B. C. Ziegler and Company                   215 North Main Street, West Bend, Wisconsin 53095                       400
Robert W. Baird & Co. Inc.                  777 East Wisconsin Avenue, Milwaukee, Wisconsin 53202                   250
Dean Witter Reynolds, Incorporated          2 World Trade Center, 59th Floor, New York, New York 10048              250
J. J. B. Hilliard, W. L. Lyons, Inc.        501 South Fourth Street, Louisville, Kentucky 40202                     250
William R. Hough & Company                  100 Second Avenue South, 8th Floor, St. Petersburg, Florida             250
                                              33701
The Principal/Eppler, Guerin & Turner,      Fountain Place, 1445 Ross Avenue, Suite 2300, Dallas, Texas             250
  Inc.                                        75201
Prudential Securities Inc.                  32 Old Slip, 16th Floor, Financial Square, New York, New York           250
  Unit Investment Trust Department            10292
Stifel, Nicolaus & Company, Incorporated    500 North Broadway, St. Louis, Missouri 63102                           250
Advest, Inc.                                280 Trumbull Street, Hartford, Connecticut 06103                        100
Butler, Wick & Co., Inc.                    City Center One, Suite 700, P.O. Box 149, Youngstown, Ohio              100
                                              44501
Dain Bosworth Incorporated                  100 Dain Tower, Minneapolis, Minnesota 55402                            100
Fidelity Capital Markets                    161 Devonshire Street D4, Boston, Massachusetts 02110                   100
  A Division of National Financial
  Services
  Corporation
First of Michigan Corporation               100 Renaissance Center, 26th Floor, Detroit, Michigan 48243             100
Gruntal & Co., Incorporated                 14 Wall Street, New York, New York 10005                                100
Mabon Securities Corp.                      One Liberty Plaza, 165 Broadway, New York, New York 10006               100
Oppenheimer & Co., Inc.                     World Financial Center, 8th Floor, New York, New York 10281             100
Roosevelt & Cross Inc.                      20 Exchange Place, New York, New York 10005                             100
Smith Barney Shearson                       2 World Trade Center, 101st Floor, New York, New York 10048             100
Southwest Securities Inc.                   1201 Elm Street, Suite 4300, Dallas, Texas 75270                        100
Wheat, First Securities, Inc.               River Front Plaza, 901 East Byrd Street, Richmond, Virginia             100
                                              23219
                                                                                                                  9,955
</TABLE>

<TABLE>
<CAPTION>
                                                                                                              IM-IT SHORT
                                                                                                             INTERMEDIATE
      NAME                                         ADDRESS                                                    TRUST UNITS
<S>                                         <C>                                                                   <C>
Van Kampen Merritt Inc.                     One Parkview Plaza, Oakbrook Terrace, Illinois 60181                  3,680
Prudential Securities Inc.                  32 Old Slip, 16th Floor, Financial Square, New York, New York           750
  Unit Investment Trust Department            10292
Dean Witter Reynolds, Incorporated          2 World Trade Center, 59th Floor, New York, New York 10048              250
A. G. Edwards & Sons, Inc.                  One North Jefferson Avenue, St. Louis, Missouri 63103                   250
Robert W. Baird & Co. Inc.                  777 East Wisconsin Avenue, Milwaukee, Wisconsin 53202                   100
Fidelity Capital Markets                    161 Devonshire Street D4, Boston, Massachusetts 02110                   100
  A Division of National Financial
  Services
  Corporation
First of Michigan Corporation               100 Renaissance Center, 26th Floor, Detroit, Michigan 48243             100
Gruntal & Co., Incorporated                 14 Wall Street, New York, New York 10005                                100
Edward D. Jones & Co.                       201 Progress Parkway, Maryland Heights, Missouri 63043                  100
Kemper Securities, Inc.                     77 West Wacker Drive, 28th Floor, Chicago, Illinois 60601               100
McDonald & Company Securities, Inc.         2100 Society Building, Cleveland, Ohio 44114                            100
Nathan & Lewis Securities, Inc.             119 West 40th Street, New York, New York 10018                          100
Oppenheimer & Co., Inc.                     World Financial Center, 8th Floor, New York, New York 10281             100
Raymond James & Associates, Inc.            880 Carillon Parkway, St. Petersburg, Florida 33733                     100
Southwest Securities Inc.                   1201 Elm Street, Suite 4300, Dallas, Texas 75270                        100
                                                                                                                  6,030
</TABLE>
 <PAGE>
                                 Underwriting                               47

<TABLE>
<CAPTION>
                                                                                                                FLORIDA
                                                                                                                 IM-IT
                                                                                                             INTERMEDIATE
                                                                                                               LADDERED
                                                                                                            MATURITY TRUST
      NAME                                         ADDRESS                                                       UNITS
<S>                                         <C>                                                                   <C>
Van Kampen Merritt Inc.                     One Parkview Plaza, Oakbrook Terrace, Illinois 60181                  2,100
Dean Witter Reynolds, Incorporated          2 World Trade Center, 59th Floor, New York, New York 10048              250
Prudential Securities Inc.                  32 Old Slip, 16th Floor, Financial Square, New York, New York           250
  Unit Investment Trust Department            10292
A. G. Edwards & Sons, Inc.                  One North Jefferson Avenue, St. Louis, Missouri 63103                   100
First of Michigan Corporation               100 Renaissance Center, 26th Floor, Detroit, Michigan 48243             100
Gruntal & Co., Incorporated                 14 Wall Street, New York, New York 10005                                100
Raymond James & Associates, Inc.            880 Carillon Parkway, St. Petersburg, Florida 33733                     100
                                                                                                                  3,000
</TABLE>

<TABLE>
<CAPTION>
                                                                                                             PENNSYLVANIA
                                                                                                              IM-IT TRUST
      NAME                                         ADDRESS                                                       UNITS
<S>                                         <C>                                                                     <C>
Van Kampen Merritt Inc.                     One Parkview Plaza, Oakbrook Terrace, Illinois 60181
Prudential Securities Inc.                  32 Old Slip, 16th Floor, Financial Square, New York, New York           500
  Unit Investment Trust Department            10292
Dean Witter Reynolds, Incorporated          2 World Trade Center, 59th Floor, New York, New York 10048              250
A. G. Edwards & Sons, Inc.                  One North Jefferson Avenue, St. Louis, Missouri 63103                   250
Legg Mason Wood Walker, Inc.                111 South Calvert Street, Baltimore, Maryland 21202                     250
Parker/Hunter, Incorporated                 600 Grant Street, Pittsburgh, Pennsylvania 15219                        250
Boenning & Scattergood, Inc.                Four Falls Corporate Center, Suite 212, Route 23, West Consho-          175
                                              hocken, Pennsylvania 19428
Advest, Inc.                                280 Trumbull Street, Hartford, Connecticut 06103                        100
Gruntal & Co., Incorporated                 14 Wall Street, New York, New York 10005                                100
Janney Montgomery Scott Inc.                1801 Market Street, 11th Floor, Philadelphia, Pennsylvania              100
                                              19103
Nathan & Lewis Securities, Inc.             119 West 40th Street, New York, New York 10018                          100
W. H. Newbold's Son & Co.                   1500 Walnut Street, Philadelphia, Pennsylvania 19102                    100
Wheat, First Securities, Inc.               River Front Plaza, 901 East Byrd Street, Richmond, Virginia             100
                                              23219
                                                                                                                  3,050
</TABLE>
    
     Units may also be sold to broker-dealers and others at prices
representing the per Unit concession or agency commission stated under "Trust
Administration--General--Unit Distribution". However, resales of Units by such
broker-dealers and others to the public will be made at the Public Offering
Price described in the Prospectus. The Sponsor reserves the right to reject,
in whole or in part, any order for the purchase of Units and the right to
change the amount of the concession or agency commission from time to time.

     In addition to any other benefits the Underwriters may realize from the
sale of the Units of the Fund, the Agreement Among Underwriters provides that
the Sponsor will share on a pro rata basis among those Underwriters who
underwrite at least 250 Units 50% of the aggregate gain, if any, represented
by the difference between the Sponsor's cost of the Securities in connection
with their acquisition and the evaluation thereof on the Date of Deposit less
deductions for certain accrued interest and certain other costs. See "Trust
Administration--General--Sponsor and Underwriter Compensation" and "Portfolio"
for the applicable Trust.

     Underwriters and broker-dealers of the Trusts, banks and/or others are
eligible to participate in a program in which such firms receive from the
Sponsor a nominal award for each of their representatives who have sold a
minimum number of units of unit investment trusts created by the Sponsor
during a specified time period. In addition, at various times the Sponsor may
implement other programs under which the sales forces of Underwriters,
brokers, dealers, banks and/or others may be eligible to win other nominal
awards for certain sales efforts, or under which the Sponsor will reallow to
any such Underwriters, brokers, dealers, banks and/or others that sponsor
sales contests or recognition programs conforming to criteria established by
the Sponsor, or participate in sales programs sponsored by the Sponsor, an
amount not exceeding the total applicable sales charges on the sales generated
by such persons
 <PAGE>
48                               Underwriting
at the public offering price during such programs. Also, the Sponsor in its
discretion may from time to time pursuant to objective criteria established by
the Sponsor pay fees to qualifying underwriters, brokers, dealers, banks or
others for certain services or activities which are primarily intended to
result in sales of Units of the Trusts. Such payments are made by the Sponsor
out of its own assets, and not out of the assets of the Trusts. These programs
will not change the price Unitholders pay for their Units or the amount that
the Trusts will receive from the Units sold. Approximately every eighteen
months the Sponsor holds a business seminar which is open to Underwriters that
sell units of trusts it sponsors. The Sponsor pays substantially all costs
associated with the seminar, excluding Underwriter travel costs. Each
Underwriter is invited to send a certain number of representatives based on
the gross number of units such firm underwrites during a designated time
period.
 <PAGE>
                             Trust Administration                           49

FUND ADMINISTRATION AND EXPENSES

     SPONSOR. Van Kampen Merritt Inc., a Delaware corporation, is the Sponsor
of the Trust. Van Kampen Merritt Inc. is primarily owned by Clayton, Dubilier
& Rice, Inc., a New York-based private investment firm. Van Kampen Merritt
Inc. management owns a significant minority equity position. Van Kampen
Merritt Inc. specializes in the underwriting and distribution of unit
investment trusts and mutual funds. The Sponsor is a member of the National
Association of Securities Dealers, Inc. and has its principal office at One
Parkview Plaza, Oakbrook Terrace, Illinois 60181, (708) 684-6000. It maintains
a branch office in Philadelphia and has regional representatives in Atlanta,
Dallas, Los Angeles, New York, San Francisco, Seattle and Tampa. As of
September 30, 1993 the total stockholders' equity of Van Kampen Merritt Inc.
was $200,885,000 (unaudited). (This paragraph relates only to the Sponsor and
not to the Insured Municipals Income Trust or to any Insured Multi-Series
thereof or to any other Underwriter. The information is included herein only
for the purpose of informing investors as to the financial responsibility of
the Sponsor and its ability to carry out its contractual obligations. More
detailed financial information will be made available by the Sponsor upon
request.)

     As of November 30, 1993, the Sponsor and its affiliates managed or
supervised approximately $38.5 billion of investment products, of which over
$25 billion is invested in municipal securities. The Sponsor and its
affiliates managed $23 billion of assets, consisting of $8.2 billion for 19
open end mutual funds, $8.3 billion for 33 closed-end funds and $6.5 billion
for 51 institutional accounts. The Sponsor has also deposited approximately
$23.5 billion of unit investment trusts. Based on cumulative assets deposited,
the Sponsor believes that it is the largest sponsor of insured municipal unit
investment trusts, primarily through the success of its Insured Municipal
Income Trust(R) or the IM-IT(R) trust. The Sponsor also provides surveillance
and evaluation services at cost for approximately $15.5 billion of unit
investment trust assets outstanding. Since 1976, the Sponsor has serviced over
one million retail investor accounts, opened through retail distribution
firms. Van Kampen Merritt Inc. is the sponsor of the various series of the
trusts listed below and the distributor of the mutual funds and closed-end
funds listed below. Unitholders may only invest in the trusts, mutual funds
and closed-end funds which are registered for sale in the state of residence
of such Unitholder. In order for a Unitholder to invest in the trusts, mutual
funds and closed-end funds listed below, such Unitholder must obtain a
prospectus relating to the trust or fund involved. A prospectus is the only
means by which an offer can be delivered to investors.

<TABLE>
<CAPTION>
                 NAME OF TRUST                                         TRUST INVESTMENT OBJECTIVE
<S>                                              <C>
Insured Municipals Income Trust................  Tax-exempt income by investing in insured municipal securities
California Insured Municipals Income Trust.....  Double tax-exemption for California residents by investing in insured
                                                 California municipal securities
New York Insured Municipals Income Trust.......  Double and in certain cases triple tax-exemption for New York residents
                                                 by investing in insured New York municipal securities
Pennsylvania Insured Municipals Income Trust...  Double and in certain cases triple tax-exemption for Pennsylvania
                                                 residents by investing in insured Pennsylvania municipal securities
Insured Municipals Income Trust, Insured         Tax-exempt income by investing in insured municipal securities; all
  Multi-Series.................................  issuers of bonds in a state trust are located in such state or in
 (Premium Bond Series, National, Limited           territories or possessions of the United States-- providing
 Maturity, Intermediate, Short Intermediate,       exemptions from all state income tax for residents of such state
 Discount, Alabama, Arizona, California,           (except for the Oklahoma IM-IT Trust where a portion of the income of
 California Intermediate, California               the Trust is subject to the Oklahoma state income tax)
 Intermediate Laddered Maturity, California
 Premium, Colorado, Connecticut, Florida,
 Florida Intermediate, Florida Intermediate
 Laddered Maturity, Georgia, Louisiana,
 Massachusetts, Massachusetts Premium,
 Michigan, Michigan Intermediate, Michigan
 Intermediate Laddered Maturity, Michigan
 Premium, Minnesota, Missouri, Missouri Inter-
 mediate Laddered Maturity, Missouri Premium,
 New Jersey, New Jersey Intermediate Laddered
 Maturity, New Mexico, New York, New York
 Intermediate, New York Intermediate Laddered
 Maturity, New York Limited Maturity, Ohio,
 Ohio Intermediate, Ohio IM-IT Intermediate
 Laddered Maturity, Ohio Premium, Oklahoma,
 Pennsylvania, Pennsylvania Intermediate,
 Pennsylvania Intermediate Laddered Maturity,
 Pennsylvania Premium, Tennessee, Texas,
 Washington, West Virginia)
Insured Tax Free Bond Trust....................  Tax-exempt income by investing in insured municipal securities
Insured Tax Free Bond Trust, Insured             Tax-exempt income by investing in insured municipal securities; all
  Multi-Series.................................  issuers of bonds in a state trust are located in such state--providing
 (National, Limited Maturity, New York)            exemptions from state income tax for residents of such state
</TABLE>
 <PAGE>

<TABLE>
<CAPTION>
50                           Trust Administration
                 NAME OF TRUST                                   TRUST INVESTMENT OBJECTIVE (Continued)
<S>                                              <C>
Investors' Quality Tax-Exempt Trust............  Tax-exempt income by investing in municipal securities
Investors' Quality Tax-Exempt Trust,             Tax-exempt income by investing in municipal securities; all issuers of
  Multi-Series.................................  bonds in a state trust are located in such state or in territories or
 (National, National AMT, Intermediate,            possessions of the United States--providing exemptions from state
 Alabama, Arizona, Arkansas, California,           income tax for residents of such state
 Colorado, Connecticut, Delaware, Florida,
 Georgia, Kansas, Kentucky, Maine, Maryland,
 Massachusetts, Michigan, Minnesota, Missouri,
 Nebraska, New Jersey, New York, North
 Carolina, Ohio, Oregon, Pennsylvania, South
 Carolina, Virginia)
Investors' Quality Municipals Trust, AMT         Tax-exempt income for investors not subject to the alternative minimum
  Series.......................................  tax by investing in municipal securities, some or all of which are
                                                   subject to the Federal alternative minimum tax
Investors' Corporate Income Trust..............  Taxable income by investing in corporate bonds
Investors' Governmental Securities--Income       Taxable income by investing in government-backed GNMA securities
  Trust........................................
Van Kampen Merritt International Bond Income     High current income through an investment in a diversified portfolio of
  Trust........................................  foreign currency denominated corporate debt obligations
Van Kampen Merritt Insured Income Trust........  High current income consistent with preservation of capital through a
                                                 diversified investment in a fixed portfolio of insured, long-term or
                                                   intermediate-term corporate debt securities
Van Kampen Merritt Utility Income Trust........  High dividend income and capital appreciation by investing in common
                                                 stock of electric utilities
Van Kampen Merritt Blue Chip Opportunity         Provide the potential for capital appreciation and income by investing
  Trust........................................  in a portfolio of actively traded, New York Stock Exchange listed
                                                   equity securities which are components of the Dow Jones Industrial
                                                   Average*
Van Kampen Merritt Blue Chip Opportunity and     Protect Unitholders' capital and provide the potential for capital
  Treasury Trust...............................    appreciation and income by investing a portion of its portfolio in
                                                   "zero coupon" U.S. Treasury obligations and the remainder of the
                                                   trust's portfolio in actively traded, New York Stock Exchange listed
                                                   equity securities which at the time of the creation of the trust were
                                                   components of the Dow Jones Industrial Average*
Van Kampen Merritt Emerging Markets Income       High current income consistent with preservation of capital through a
  Trust........................................  diversified investment in a fixed portfolio primarily consisting of
                                                   Brady Bonds of emerging market countries that have restructured
                                                   sovereign debt pursuant to the framework of the Brady Plan
Van Kampen Merritt Global Telecommunications     Provide the potential for capital appreciation and income consistent
  Trust........................................  with the preservation of invested capital, by investing in a portfolio
                                                   of equity securities which provide equipment for or services to the
                                                   telecommunications industry
Van Kampen Merritt Global Energy Trust.........  Provide the potential for capital appreciation and income consistent
                                                 with the preservation of invested capital, by investing in a portfolio
                                                   of equity securities diversified within the energy industry
              NAME OF MUTUAL FUND                                       FUND INVESTMENT OBJECTIVE
Van Kampen Merritt U.S. Government Fund........  High current income by investing in U.S. Government securities
Van Kampen Merritt Insured Tax Free Income       High current income exempt from Federal income taxes by investing in
 Fund..........................................  insured municipal securities
Van Kampen Merritt Municipal Income Fund.......  High level of current income exempt from Federal income tax, consistent
                                                 with preservation of capital
Van Kampen Merritt Tax Free High Income Fund...  High current income exempt from Federal income taxes by investing in
                                                 medium and lower grade municipal securities
Van Kampen Merritt California Insured Tax Free   High current income exempt from Federal and California income taxes by
 Fund..........................................  investing in insured California municipal securities
Van Kampen Merritt High Yield Fund.............  Provide a high level of current income by investing in medium and lower
                                                 grade domestic and foreign government and corporate debt securities.
                                                  The Fund will seek capital appreciation as a secondary objective
Van Kampen Merritt Growth and Income Fund......  Long-term growth of both capital and dividend income by investing in
                                                 dividend paying common stocks
Van Kampen Merritt Pennsylvania Tax Free Income  High current income exempt from Federal and Pennsylvania state and
 Fund..........................................  local income taxes by investing in medium and lower grade Pennsylvania
                                                  municipal securities
Van Kampen Merritt Money Market Fund...........  High current income by investing in a broad range of money market
                                                 instruments that will mature within twelve months
Van Kampen Merritt Tax Free Money Fund.........  High current income exempt from Federal income taxes by investing in a
                                                 broad range of municipal securities that will mature within twelve
                                                  months
Van Kampen Merritt Short-Term Global Income      High current income by investing in a global portfolio of high quality
 Fund..........................................  debt securities denominated in various currencies having remaining
                                                  maturities of not more than three years
Van Kampen Merritt Adjustable Rate U.S.          High level of current income with a relatively stable net asset value
 Government Fund...............................  investing in U.S. Government securities
Van Kampen Merritt Limited Term Municipal        High level of current income exempt from federal income tax, consistent
 Income Fund...................................  with preservation of capital
</TABLE>

* The Dow Jones Industrial Average is the property of Dow Jones & Company,
Inc. Dow Jones & Company, Inc. has not granted to the Trust or the Sponsor a
license to use the Dow Jones Industrial Average.
 <PAGE>
                             Trust Administration                           51

<TABLE>
<CAPTION>
            NAME OF CLOSED-END FUND                                     FUND INVESTMENT OBJECTIVE
<S>                                              <C>
Van Kampen Merritt Municipal Income Trust......  High current income exempt from Federal income taxes with safety of
                                                 principal by investing in a diversified portfolio of investment grade
                                                  municipal securities
Van Kampen Merritt California Municipal          High current income exempt from Federal and California income taxes
 Trust.........................................  with safety of principal by investing in a diversified portfolio of
                                                  investment grade California municipal securities
Van Kampen Merritt Intermediate Term High        High current income while seeking to preserve shareholders' capital by
 Income Trust..................................  investing in a diversified portfolio of high yield fixed income
                                                  securities
Van Kampen Merritt Limited Term High Income      High current income while seeking to preserve shareholders' capital by
 Trust.........................................  investing in a diversified portfolio of high yield fixed income
                                                  securities
Van Kampen Merritt Prime Rate Income Trust.....  High current income, consistent with preservation of capital by
                                                 investing in interests in floating or variable rate senior loans
Van Kampen Merritt Investment Grade Municipal    High current income exempt from Federal income tax, consistent with
 Trust.........................................  preservation of capital
Van Kampen Merritt Municipal Trust.............  High level of current income exempt from Federal income tax, consistent
                                                 with preservation of capital
Van Kampen Merritt California Quality Municipal  High current income exempt from Federal and California income taxes
 Trust.........................................  with safety of principal by investing in a diversified portfolio of
                                                  investment grade California municipal securities
Van Kampen Merritt Florida Quality Municipal     High current income exempt from Federal income taxes and Florida
 Trust.........................................  intangible personal property taxes with safety of principal by
                                                  investing in a diversified portfolio of investment grade Florida
                                                  municipal securities
Van Kampen Merritt New York Quality Municipal    High current income exempt from Federal as well as New York State and
 Trust.........................................  New York City income taxes with safety of principal by investing in a
                                                  diversified portfolio of investment grade New York municipal
                                                  securities
Van Kampen Merritt Ohio Quality Municipal        High current income exempt from Federal and Ohio income taxes with
 Trust.........................................  safety of principal by investing in a diversified portfolio of
                                                  investment grade Ohio municipal securities
Van Kampen Merritt Pennsylvania Quality          High current income exempt from Federal and Pennsylvania income taxes
 Municipal Trust...............................  with safety of principal by investing in a diversified portfolio of
                                                  investment grade Pennsylvania municipal securities
Van Kampen Merritt Trust for Investment Grade    High level of current income exempt from Federal income tax, consistent
 Municipals....................................  with preservation of capital
Van Kampen Merritt Trust for Insured             High level of current income exempt from Federal income tax, consistent
 Municipals....................................  with preservation of capital by investing in a diversified portfolio of
                                                  municipal securities which are covered by insurance with respect to
                                                  timely payment of principal and interest
Van Kampen Merritt Trust for Investment Grade    High level of current income exempt from Federal and California income
 CA Municipals.................................   taxes, consistent with preservation of capital by investing in a
                                                  diversified portfolio of California municipal securities
Van Kampen Merritt Trust for Investment Grade    High level of current income exempt from Federal income taxes,
 FL Municipals.................................   consistent with preservation of capital. The Fund also seeks to offer
                                                  its Shareholders the opportunity to own securities exempt from Florida
                                                  intangible personal property taxes
Van Kampen Merritt Trust for Investment Grade    High level of current income exempt from Federal income taxes and New
 NJ Municipals.................................   Jersey gross income taxes, consistent with preservation of capital
Van Kampen Merritt Trust for Investment Grade    High level of current income exempt from Federal as well as from New
 NY Municipals.................................   York State and New York City income taxes, consistent with
                                                  preservation of capital
Van Kampen Merritt Trust for Investment Grade    High level of current income exempt from Federal and Pennsylvania
 PA Municipals.................................   income taxes and, where possible under local law, local income and
                                                  property taxes, consistent with preservation of capital
Van Kampen Merritt Municipal Opportunity         High level of current income exempt from Federal income tax, consistent
 Trust.........................................  with preservation of capital by investing in a diversified portfolio of
                                                  municipal securities
Van Kampen Merritt Advantage Municipal Income    High level of current income exempt from Federal income tax, consistent
 Trust.........................................  with preservation of capital by investing in a diversified portfolio of
                                                  municipal securities
Van Kampen Merritt Advantage Pennsylvania        High level of current income exempt from Federal and Pennsylvania
 Municipal Income Trust........................   income taxes and, where possible under local law, local income and
                                                  property taxes, consistent with preservation of capital
Van Kampen Merritt Strategic Sector Municipal    Provide common shareholders with a high level of current income exempt
 Trust.........................................  from Federal income taxes, consistent with preservation of capital
Van Kampen Merritt Value Municipal Income        High level of current income exempt from Federal income taxes,
 Trust.........................................  consistent with preservation of capital
Van Kampen Merritt California Value Municipal    High level of current income exempt from Federal and California income
 Income Trust..................................  taxes, consistent with preservation of capital
Van Kampen Merritt Massachusetts Value           High level of current income exempt from Federal income taxes and
 Municipal Income Trust........................   Massachusetts personal income taxes, consistent with preservation of
                                                  capital
Van Kampen Merritt New Jersey Value Municipal    High level of current income exempt from Federal income taxes and New
 Income Trust..................................   Jersey gross income tax, consistent with preservation of capital
Van Kampen Merritt New York Value Municipal      High level of current income exempt from Federal as well as New York
 Income Trust..................................   State and New York City income taxes, consistent with preservation of
                                                  capital
Van Kampen Merritt Ohio Value Municipal Income   High level of current income exempt from Federal and Ohio income taxes,
 Trust.........................................  consistent with preservation of capital
Van Kampen Merritt Pennsylvania Value Municipal  High level of current income exempt from Federal and Pennsylvania
 Income Trust..................................   income taxes, consistent with preservation of capital
</TABLE>
 <PAGE>
52                           Trust Administration

    If the Sponsor shall fail to perform any of its duties under the Trust
Agreement or become incapable of acting or become bankrupt or its affairs are
taken over by public authorities, then the Trustee may (i) appoint a successor
Sponsor at rates of compensation deemed by the Trustee to be reasonable and
not exceeding amounts prescribed by the Securities and Exchange Commission,
(ii) terminate the Trust Agreement and liquidate the Fund as provided therein
or (iii) continue to act as Trustee without terminating the Trust Agreement.

     All costs and expenses incurred in creating and establishing the Fund,
including the cost of the initial preparation, printing and execution of the
Trust Agreement and the certificates, legal and accounting expenses,
advertising and selling expenses, expenses of the Trustee, initial evaluation
fees and other out-of-pocket expenses have been borne by the Sponsor at no
cost to the Fund.

     COMPENSATION OF SPONSOR AND EVALUATOR. The Sponsor will not receive any
fees in connection with its activities relating to the Fund. However, American
Portfolio Evaluation Services, a division of Van Kampen Merritt Investment
Advisory Corp., which is a wholly-owned subsidiary corporation of the Sponsor,
will receive an annual supervisory fee as indicated under "Summary of
Essential Financial Information" for providing portfolio supervisory services
for the Fund. Such fee (which is based on the number of Units outstanding in
each Trust on January 1 of each year) may exceed the actual costs of providing
such supervisory services for this Fund, but at no time will the total amount
received for portfolio supervisory services rendered to Insured Municipals
Income Trust, 1st Insured Multi-Series and subsequent series and to any other
unit investment trusts sponsored by the Sponsor for which the Evaluator
provides portfolio supervisory services in any calendar year exceed the
aggregate cost to the Evaluator of supplying such services in such year. In
addition, the Evaluator shall receive an annual evaluation fee as indicated
under "Summary of Essential Financial Information" for regularly evaluating
each Trust's portfolio. Both of the foregoing fees may be increased without
approval of the Unitholders by amounts not exceeding proportionate increases
under the category "All Services Less Rent of Shelter" in the Consumer Price
Index published by the United States Department of Labor or, if such category
is no longer published, in a comparable category. The Sponsor and the
Underwriters will receive sales commissions and may realize other profits (or
losses) in connection with the sale of Units and the deposit of the Securities
as described under "General--Sponsor and Underwriter Compensation" below.

     TRUSTEE. The Trustee is The Bank of New York, a trust company organized
under the laws of New York. The Bank of New York has its offices at 101
Barclay Street, New York, New York 10286 (800) 221-7668. The Bank of New York
is subject to supervision and examination by the Superintendent of Banks of
the State of New York and the Board of Governors of the Federal Reserve
System, and its deposits are insured by the Federal Deposit Insurance
Corporation to the extent permitted by law.

     The duties of the Trustee are primarily ministerial in nature. It did not
participate in the selection of Bonds for the portfolios of any of the Trusts.

     In accordance with the Trust Agreement, the Trustee shall keep proper
books of record and account of all transactions at its office for the Fund.
Such records shall include the name and address of, and the certificates
issued by the Fund to, every Unitholder of the Fund. Such books and records
shall be open to inspection by any Unitholder at all reasonable times during
the usual business hours. The Trustee shall make such annual or other reports
as may from time to time be required under any applicable state or Federal
statute, rule or regulation (see "Unitholder Explanations--Public
Offering--Reports Provided"). The Trustee is required to keep a certified copy
or duplicate original of the Trust Agreement on file in its office available
for inspection at all reasonable times during the usual business hours by any
Unitholder, together with a current list of the Securities held in the Fund.

     Under the Trust Agreement, the Trustee or any successor trustee may
resign and be discharged of the trusts created by the Trust Agreement by
executing an instrument in writing and filing the same with the Sponsor. The
Trustee or successor trustee must mail a copy of the notice of resignation to
all Fund Unitholders then of record, not less than 60 days before the date
specified in such notice when such resignation is to take effect. The Sponsor
upon receiving notice of such resignation is obligated to appoint a successor
trustee promptly. If, upon such resignation, no successor trustee has been
appointed and has accepted the appointment within 30 days after notification,
the retiring Trustee may apply to a court of competent jurisdiction for the
appointment of a successor. The Sponsor may remove the Trustee and appoint a
successor trustee as provided in the Trust Agreement at any time with or
without cause. Notice of such removal and appointment shall be mailed to each
Unitholder by the Sponsor. Upon execution of a written acceptance of such
appointment by such successor trustee, all the rights, powers, duties and
obligations of
 <PAGE>
                             Trust Administration                           53
the original trustee shall vest in the successor. The resignation or removal
of a Trustee becomes effective only when the successor trustee accepts its
appointment as such or when a court of competent jurisdiction appoints a
successor trustee.

     Any corporation into which a Trustee may be merged or with which it may
be consolidated, or any corporation resulting from any merger or consolidation
to which a Trustee shall be a party, shall be the successor trustee. The
Trustee must be a banking corporation organized under the laws of the United
States or any state and having at all times an aggregate capital, surplus and
undivided profits of not less than $5,000,000.

     TRUSTEE'S FEE. For its services the Trustee will receive a fee based on
the aggregate outstanding principal amount of Securities in each Trust as of
the opening of business on January 2 and July 2 of each year as set forth
under "Per Unit Information" for the applicable Trust. During the first year
the Trustee may agree to reduce its fee (and to the extent necessary pay
miscellaneous expenses of a Trust) as stated under "Per Unit Information" for
the applicable Trust. The Trustee's fees are payable monthly on or before the
fifteenth day of each month from the Interest Account of each Trust to the
extent funds are available and then from the Principal Account of each Trust,
with such payments being based on each Trust's portion of such expenses. Since
the Trustee has the use of the funds being held in the Principal and Interest
Accounts for future distributions, payment of expenses and redemptions and
since such Accounts are non-interest bearing to Unitholders, the Trustee
benefits thereby. Part of the Trustee's compensation for its services to each
Trust is expected to result from the use of these funds. Such fees may be
increased without approval of the Unitholders by amounts not exceeding
proportionate increases under the category "All Services Less Rent of Shelter"
in the Consumer Price Index published by the United States Department of Labor
or, if such category is no longer published, in a comparable category. The
Trustee's fees will not be increased in future years in order to make up any
reduction in the Trustee's fees described under "Per Unit Information" for the
applicable Trust. For a discussion of the services rendered by the Trustee
pursuant to its obligations under the Trust Agreement, see "Unitholder
Explanations--Public Offering--Reports Provided" and "Trustee" above.

     PORTFOLIO ADMINISTRATION. The Trustee is empowered to sell, for the
purpose of redeeming Units tendered by any Unitholder, and for the payment of
expenses for which funds may not be available, such of the Bonds designated by
the Evaluator as the Trustee in its sole discretion may deem necessary. The
Evaluator, in designating such Securities, will consider a variety of factors,
including (a) interest rates, (b) market value and (c) marketability. In
connection with the Insured Trusts to the extent that Bonds are sold which are
current in payment of principal and interest in order to meet redemption
requests and defaulted Bonds are retained in the portfolio in order to
preserve the related insurance protection applicable to said Bonds, the
overall quality of the Bonds remaining in such Trust's portfolio will tend to
diminish. Except as described in this section and in certain other unusual
circumstances for which it is determined by the Trustee to be in the best
interests of the Unitholders or if there is no alternative, the Trustee is not
empowered to sell Bonds from an Insured Trust which are in default in payment
of principal or interest or in significant risk of such default and for which
value has been attributed for the insurance obtained by such Insured Trust.
Because of such restrictions on the Trustee under certain circumstances, the
Sponsor may seek a full or partial suspension of the right of Unitholders to
redeem their Units in an Insured Trust. See "Unitholder Explanations--Public
Offering--Redemption of Units". The Sponsor is empowered, but not obligated,
to direct the Trustee to dispose of Bonds in the event of an advanced
refunding.

     The Sponsor is required to instruct the Trustee to reject any offer made
by an issuer of any of the Securities to issue new obligations in exchange or
substitution for any Security pursuant to a refunding or refinancing plan,
except that the Sponsor may instruct the Trustee to accept or reject such an
offer or to take any other action with respect thereto as the Sponsor may deem
proper if (1) the issuer is in default with respect to such Security or (2) in
the written opinion of the Sponsor the issuer will probably default with
respect to such Security in the reasonably foreseeable future. Any obligation
so received in exchange or substitution will be held by the Trustee subject to
the terms and conditions of the Trust Agreement to the same extent as
Securities originally deposited thereunder. Within five days after the deposit
of obligations in exchange or substitution for underlying Securities, the
Trustee is required to give notice thereof to each Unitholder of the Trust
thereby affected, identifying the Securities eliminated and the Securities
substituted therefor. Except as stated herein and under "Unitholder
Explanations--Settlement of Bonds in the Trusts" regarding the substitution of
Replacement Bonds for Failed Bonds, the acquisition by the Fund of any
securities other than the Securities initially deposited is not permitted.
 <PAGE>
54                           Trust Administration

     If any default in the payment of principal or interest on any Security
occurs and no provision for payment is made therefor within 30 days, the
Trustee is required to notify the Sponsor thereof. If the Sponsor fails to
instruct the Trustee to sell or to hold such Security within 30 days after
notification by the Trustee to the Sponsor of such default, the Trustee may in
its discretion sell the defaulted Security and not be liable for any
depreciation or loss thereby incurred.

     SPONSOR PURCHASES OF UNITS. The Trustee shall notify the Sponsor of any
tender of Units for redemption. If the Sponsor's bid in the secondary market
at that time equals or exceeds the Redemption Price per Unit, it may purchase
such Units by notifying the Trustee before the close of business on the second
succeeding business day and by making payment therefor to the Unitholder not
later than the day on which the Units would otherwise have been redeemed by
the Trustee. Units held by the Sponsor may be tendered to the Trustee for
redemption as any other Units.

     The offering price of any Units acquired by the Sponsor will be in accord
with the Public Offering Price described in the then currently effective
prospectus describing such Units. Any profit resulting from the resale of such
Units will belong to the Sponsor which likewise will bear any loss resulting
from a lower offering or Redemption Price subsequent to its acquisition of
such Units.

     INSURANCE PREMIUMS. The cost of the portfolio insurance obtained by the
respective Trusts, if any, is that amount shown in footnote (5) in "Notes to
Portfolios", so long as such Trust retains the Bonds. Premiums, which are
obligations of each Insured Trust, are payable monthly by the Trustee on
behalf of the respective Trust. As Bonds in the portfolio of an Insured Trust
are redeemed by their respective issuers or are sold by the Trustee, the
amount of the premium will be reduced in respect of those Bonds no longer
owned by and held in such Trust. If the Trustee exercises the right to obtain
permanent insurance, the premiums payable for such permanent insurance will be
paid solely from the proceeds of the sale of the related Bonds. The premiums
for such permanent insurance with respect to each Bond will decline over the
life of the Bond. A Trust does not incur any expense for Preinsured Bond
insurance, since the premium or premiums for such insurance have been paid by
the issuer or the Sponsor prior to the deposit of such Preinsured Bonds in a
Trust. Preinsured Bonds are not additionally insured by an Insured Trust.

     MISCELLANEOUS EXPENSES. The following additional charges are or may be
incurred by the Trusts: (a) fees of the Trustee for extraordinary services,
(b) expenses of the Trustee (including legal and auditing expenses) and of
counsel designated by the Sponsor, (c) various governmental charges, (d)
expenses and costs of any action taken by the Trustee to protect the Trusts
and the rights and interests of Unitholders, (e) indemnification of the
Trustee for any loss, liability or expenses incurred by it in the
administration of the Fund without negligence, bad faith or willful misconduct
on its part, (f) any special custodial fees payable in connection with the
sale of any of the Bonds in a Trust and (g) expenditures incurred in
contacting Unitholders upon termination of the Trusts.

     The fees and expenses set forth herein are payable out of the Trusts.
When such fees and expenses are paid by or owing to the Trustee, they are
secured by a lien on the portfolio or portfolios of the applicable Trust or
Trusts. If the balances in the Interest and Principal Accounts are
insufficient to provide for amounts payable by the Fund, the Trustee has the
power to sell Securities to pay such amounts.

GENERAL

     AMENDMENT OR TERMINATION. The Sponsor and the Trustee have the power to
amend the Trust Agreement without the consent of any of the Unitholders when
such an amendment is (a) to cure an ambiguity or to correct or supplement any
provision of the Trust Agreement which may be defective or inconsistent with
any other provision contained therein or (b) to make such other provisions as
shall not adversely affect the interest of the Unitholders (as determined in
good faith by the Sponsor and the Trustee), provided that the Trust Agreement
may not be amended to increase the number of Units issuable thereunder or to
permit the deposit or acquisition of securities either in addition to or in
substitution for any of the Securities initially deposited in the Fund, except
for the substitution of certain refunding securities for such Securities. In
the event of any amendment, the Trustee is obligated to notify promptly all
Unitholders of the substance of such amendment.
   
     A Trust may be terminated at any time by consent of Unitholders of 51% of
the Units of such Trust then outstanding or by the Trustee when the value of
such Trust, as shown by any semi-annual evaluation, is less than that
indicated under "Summary of Essential Financial Information". A Trust will be
liquidated by the Trustee in the event that a sufficient number of Units not
yet sold are tendered for redemption by the Underwriters, including the
Sponsor,
 <PAGE>
                             Trust Administration                           55
so that the net worth of such Trust would be reduced to less than 40% of the
initial principal amount of such Trust. If a Trust is liquidated because of
the redemption of unsold Units by the Underwriters, the Sponsor will refund to
each purchaser of Units the entire sales charge paid by such purchaser. The
Trust Agreement provides that each Trust shall terminate upon the redemption,
sale or other disposition of the last Security held in such Trust, but in no
event shall it continue beyond the end of the year preceding the fiftieth
anniversary of the Trust Agreement in the case of an IM-IT or a State Trust
(other than a State Intermediate Laddered Maturity Trust), or beyond the end
of the year preceding the twentieth anniversary of the Trust Agreement in the
case of an IM-IT Limited Maturity, IM-IT Intermediate, State Intermediate
Laddered Maturity and IM-IT Short Intermediate Trust. In the event of
termination of the Fund or any Trust, written notice thereof will be sent by
the Trustee to each Unitholder of such Trust at his address appearing on the
registration books of the Fund maintained by the Trustee. Within a reasonable
time thereafter the Trustee shall liquidate any Securities then held in such
Trust and shall deduct from the funds of such Trust any accrued costs,
expenses or indemnities provided by the Trust Agreement, including estimated
compensation of the Trustee and costs of liquidation and any amounts required
as a reserve to provide for payment of any applicable taxes or other
governmental charges. The sale of Securities in the Trust upon termination may
result in a lower amount than might otherwise be realized if such sale were
not required at such time. For this reason, among others, the amount realized
by a Unitholder upon termination may be less than the principal amount of
Securities represented by the Units held by such Unitholder. The Trustee shall
then distribute to each Unitholder his share of the balance of the Interest
and Principal Accounts. With such distribution the Unitholder shall be
furnished a final distribution statement of the amount distributable. At such
time as the Trustee in its sole discretion shall determine that any amounts
held in reserve are no longer necessary, it shall make distribution thereof to
Unitholders in the same manner.
    
     Notwithstanding the foregoing, in connection with final distributions to
Unitholders of an Insured Trust, it should be noted that because the portfolio
insurance obtained by an Insured Trust is applicable only while Bonds so
insured are held by such Trust, the price to be received by such Trust upon
the disposition of any such Bond which is in default, by reason of nonpayment
of principal or interest, will not reflect any value based on such insurance.
Therefore, in connection with any liquidation, it shall not be necessary for
the Trustee to, and the Trustee does not currently intend to, dispose of any
Bond or Bonds if retention of such Bond or Bonds, until due, shall be deemed
to be in the best interest of Unitholders, including, but not limited to,
situations in which a Bond or Bonds so insured are in default and situations
in which a Bond or Bonds so insured have deteriorated market prices resulting
from a significant risk of default. Since the Preinsured Bonds will reflect
the value of the related insurance, it is the present intention of the Sponsor
not to direct the Trustee to hold any of such Preinsured Bonds after the date
of termination. All proceeds received, less applicable expenses, from
insurance on defaulted Bonds not disposed of at the date of termination will
ultimately be distributed to Unitholders of record as of such date of
termination as soon as practicable after the date such defaulted Bond or Bonds
become due and applicable insurance proceeds have been received by the
Trustee.

     LIMITATION ON LIABILITIES. The Sponsor, the Evaluator and the Trustee
shall be under no liability to Unitholders for taking any action or for
refraining from taking any action in good faith pursuant to the Trust
Agreement, or for errors in judgment, but shall be liable only for their own
willful misfeasance, bad faith or gross negligence in the performance of their
duties or by reason of their reckless disregard of their obligations and
duties hereunder. The Trustee shall not be liable for depreciation or loss
incurred by reason of the sale by the Trustee of any of the Securities. In the
event of the failure of the Sponsor to act under the Trust Agreement, the
Trustee may act thereunder and shall not be liable for any action taken by it
in good faith under the Trust Agreement.

     The Trustee shall not be liable for any taxes or other governmental
charges imposed upon or in respect of the Securities or upon the interest
thereon or upon it as Trustee under the Trust Agreement or upon or in respect
of the Fund which the Trustee may be required to pay under any present or
future law of the United States of America or of any other taxing authority
having jurisdiction. In addition, the Trust Agreement contains other customary
provisions limiting the liability of the Trustee.

     The Trustee, Sponsor and Unitholders may rely on any evaluation furnished
by the Evaluator and shall have no responsibility for the accuracy thereof.
Determinations by the Evaluator under the Trust Agreement shall be made in
good faith upon the basis of the best information available to it; provided,
however, that the Evaluator shall be under no liability to the Trustee,
Sponsor or Unitholders for errors in judgment. This provision shall not
protect the Evaluator in any case of willful misfeasance, bad faith, gross
negligence or reckless disregard of its obligations and duties.
 <PAGE>
56                           Trust Administration

     UNIT DISTRIBUTION. During the initial offering period, Units will be
distributed to the public by Underwriters, broker-dealers and others (see
"Underwriting") at the Public Offering Price, plus accrued interest computed
as described above under "Unitholder Explanations--Interest Earning
Schedule--Accrued Interest (Accrued Interest to Carry)". Upon the completion
of the initial offering, Units repurchased in the secondary market, if any,
may be offered by this Prospectus at the secondary Public Offering Price in
the manner described.

     The Sponsor intends to qualify the Units for sale in a number of states.
Broker-dealers or others will be allowed a concession or agency commission in
connection with the distribution of Units during the initial offering period
of $20.00 per Unit for less than 100 Units, $22.00 per Unit for any single
transaction of 100 to 249 Units, $21.50 per Unit for any single transaction of
250 to 499 Units, $24.50 per Unit for any single transaction of 500 to 999
Units and $24.00 per Unit for any single transaction of 1,000 or more Units of
an IM-IT Short Intermediate Trust and in the case of an IM-IT or a State Trust
(other than a State Intermediate Laddered Maturity Trust) $30.00 per Unit for
less than 100 Units, $36.00 per Unit for any single transaction of 100 to 249
Units, $38.00 per Unit for any single transaction of 250 to 499 Units, $39.00
per Unit for any single transaction of 500 to 999 Units and $39.00 per Unit
for any single transaction of 1,000 or more Units, provided that such Units
are acquired either from the Sponsor (in the case of dealer transactions) or
through the Sponsor (in the case of transactions involving brokers or others).
The increased concession or agency commission is a result of the discount
given to purchasers for quantity purchases. See "Unitholder
Explanations--Public Offering--General". Certain commercial banks are making
Units of the Fund available to their customers on an agency basis. A portion
of the sales charge paid by these customers (equal to the agency commission
referred to above) is retained by or remitted to the banks. Under the
Glass-Steagall Act, banks are prohibited from underwriting Units of the Fund;
however, the Glass-Steagall Act does permit certain agency transactions and
the banking regulators have not indicated that these particular agency
transactions are not permitted under such Act. In addition, state securities
laws on this issue may differ from the interpretations of federal law
expressed herein and banks and financial institutions may be required to
register as dealers pursuant to state law. Any quantity discount (see
"Unitholder Explanations--Public Offering--General") provided to investors
will be borne by the selling dealer or agent. For secondary market
transactions, such concession or agency commission will amount to 70% of the
applicable sales charge as determined using the table found in "Unitholder
Explanations-- Public Offering".

     To facilitate the handling of transactions during the initial offering
period, sales of Units shall normally be limited to transactions involving a
minimum of five Units. Further purchases may be made in multiples of one Unit.
The minimum purchase in the secondary market will be one Unit.

     The Sponsor reserves the right to reject, in whole or in part, any order
for the purchase of Units and to change the amount of the concession or agency
commission to dealers and others from time to time. See "Underwriting".

     SPONSOR AND UNDERWRITER COMPENSATION. The Underwriters will receive a
gross sales commission equal to that percentage of the Public Offering Price
of the Units (excluding Purchased Interest) as indicated under "Unitholder
Explanations--Public Offering--Offering Price" less any reduced sales charges
for quantity purchases as described under "Unitholder Explanations--Public
Offering--General".
   
     The Sponsor will receive from the Underwriters the excess of such gross
sales commission over $35.00, $29.00, $27.00, $22.00, $22.00 and $35.00 per
Unit of any Quality, IM-IT Limited Maturity, IM-IT Intermediate, IM-IT Short
Intermediate, State Intermediate Laddered Maturity and other Insured Trusts,
respectively, as of the Date of Deposit. In connection with quantity sales to
purchasers of any IM-IT, State Trust (other than a State Intermediate Laddered
Maturity Trust) or National Quality Trust the Underwriters will receive from
the Sponsor commissions totalling $37.00 per Unit for any single transaction
of 100 to 249 Units, $39.00 per Unit for any single transaction of 250 to 499
Units, $40.00 per Unit for any single transaction of 500 to 999 Units and
$39.00 per Unit for any single transaction of 1,000 or more Units. In
connection with quantity sales to purchasers of any State Intermediate
Laddered Maturity Trust the Underwriters will receive from the Sponsor
commissions totalling $23.00 per Unit for any single transaction of 100 to 249
Units, $23.00 per Unit for any single transaction of 250 to 499 Units, $24.75
per Unit for any single transaction or 500 to 999 Units and $24.00 per Unit
for any single transaction of 1,000 or more Units. In connection with quantity
sales to purchasers of any Pennsylvania IM-IT Trust the Underwriters will
receive from the Sponsor commissions totalling $35.00 per Unit for any single
transaction of 100 to 249 Units, $36.00 per Unit for any single transaction of
250 to 499 Units, $37.00 per Unit for any single transaction of 500 to 999
Units and $38.00 per Unit for any single transaction of 1,000 or more Units.
In addition, any Underwriter that sells a total of 25% or 1,500
 <PAGE>
                             Trust Administration                           57
Units, whichever is greater, of any Pennsylvania IM-IT Trust will receive an
additional $2.00 per each such Unit. In connection with quantity sales to
purchasers of any IM-IT Short Intermediate Trust the Underwriters will receive
from the Sponsor commissions totalling $23.00 per Unit for any single
transaction of 100 to 249 Units, $23.00 per Unit for any single transaction to
250 to 499 Units, $24.75 per Unit for any single transaction of 500 to 999
Units and $24.00 per Unit for any single transaction of 1,000 or more Units.
In addition, A. G. Edwards & Sons, Inc. ("Edwards") will receive from the
Sponsor reimbursement for certain costs and further compensation in the amount
of $5.00 for each Unit of the IM-IT it underwrites, and $2.00 for each Unit it
underwrites of the IM-IT Short Intermediate Trust, provided it underwrites a
minimum of 1,000 Units of the IM-IT Short Intermediate Trust. Also, if The
Principal/Eppler, Guerin & Turner, Inc. commits (on the Date of Deposit) to
underwrite a total of 4,000 or more Units of this series of the IM-IT, any
other series of the IM-IT and/or any series of the Texas Insured Municipals
Income Trust during any calendar month, then The Principal/Eppler, Guerin &
Turner, Inc. will receive an additional $1.00 per Unit for each of the Units
of such Trust it commits to underwrite in said month. See "Unitholder
Explanations--Public Offering--General". Further, each Underwriter who
underwrites 1,000 or more Units in any Trust will receive additional
compensation from the Sponsor of $1.00 for each Unit it underwrites. In
addition, the Sponsor and certain of the Underwriters will realize a profit or
the Sponsor will sustain a loss, as the case may be, as a result of the
difference between the price paid for the Securities by the Sponsor and the
cost of such Securities to a Trust (which is based on the determination by
Interactive Data Services, Inc. of the aggregate offering price of the
underlying Securities in such Trust on the Date of Deposit). See
"Underwriting" and "Portfolio" for the applicable Trust and "Notes to
Portfolios". The Sponsor and the Underwriters may also realize profits or
sustain losses with respect to Securities deposited in each Trust which were
acquired by the Sponsor from underwriting syndicates of which they were
members. The Sponsor has participated as sole underwriter or as manager or as
a member of the underwriting syndicates from which none of the aggregate
principal amount of the Securities in the portfolios of the Fund were
acquired. The Underwriters may further realize additional profit or loss
during the initial offering period as a result of the possible fluctuations in
the market value of the Securities in each Trust after the Date of Deposit,
since all proceeds received from purchasers of Units (excluding dealer
concessions or agency commissions allowed, if any) will be retained by the
Underwriters. Affiliates of an Underwriter are entitled to the same dealer
concessions or agency commissions that are available to the Underwriter.
    
     As stated under "Unitholder Explanations--Public Offering--Market for
Units", the Sponsor intends to, and certain of the other Underwriters may,
maintain a secondary market for the Units of the Fund. In so maintaining a
market, such person or persons will also realize profits or sustain losses in
the amount of any difference between the price at which Units are purchased
and the price at which Units are resold (which price is based on the bid
prices of the Securities in such Trust and includes a sales charge). In
addition, such person or persons will also realize profits or sustain losses
resulting from a redemption of such repurchased Units at a price above or
below the purchase price for such Units, respectively.
 <PAGE>
58                              Other Matters

OTHER MATTERS
   
     LEGAL OPINIONS. The legality of the Units offered hereby and certain
matters relating to Federal and Florida tax law have been passed upon by
Chapman and Cutler, 111 West Monroe Street, Chicago, Illinois 60603, as
counsel for the Sponsor. Saul, Ewing, Remick & Saul has acted as special
counsel to the Fund for Pennsylvania tax matters. Tanner Propp & Farber has
acted as counsel for the Trustee and as special counsel to the Fund for New
York tax matters. None of the special counsel for the Fund has expressed any
opinion regarding the completeness or materiality of any matters contained in
this Prospectus other than the tax opinion set forth under "Tax Status"
relating to the Trust for which it has provided an opinion.
    
     INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS. The statements of condition and
the related securities portfolios at the Date of Deposit included in this
Prospectus have been audited by Grant Thornton, independent certified public
accountants, as set forth in their report in this prospectus, and are included
herein in reliance upon the authority of said firm as experts in accounting
and auditing.

FEDERAL TAX STATUS

     In the opinion of Chapman and Cutler, counsel for the Sponsor, under
existing law:
     (1)   Each Trust is not an association taxable as a corporation for
        Federal income tax purposes and interest and accrued original issue
        discount on Bonds which is excludable from gross income under the
        Internal Revenue Code of 1986 (the "Code") will retain its status when
        distributed to Unitholders, except to the extent such interest is
        subject to the alternative minimum tax, an additional tax on branches
        of foreign corporations and the environmental tax (the "Superfund
        Tax"), as noted below;
     (2)   Each Unitholder is considered to be the owner of a pro rata portion
        of the respective Trust under subpart E, subchapter J of chapter 1 of
        the Code and will have a taxable event when such Trust disposes of a
        Bond, or when the Unitholder redeems or sells his Units. Unitholders
        must reduce the tax basis of their Units for their share of accrued
        interest received by the respective Trust, if any, on Bonds delivered
        after the Unitholders pay for their Units to the extent that such
        interest accrued on such Bonds during the period from the Unitholder's
        settlement date to the date such Bonds are delivered to the respective
        Trust and, consequently, such Unitholders may have an increase in
        taxable gain or reduction in capital loss upon the disposition of such
        Units. Gain or loss upon the sale or redemption of Units is measured
        by comparing the proceeds of such sale or redemption with the adjusted
        basis of the Units. If the Trustee disposes of Bonds (whether by sale,
        payment on maturity, redemption or otherwise), gain or loss is
        recognized to the Unitholder. The amount of any such gain or loss is
        measured by comparing the Unitholder's pro rata share of the total
        proceeds from such disposition with the Unitholder's basis for his or
        her fractional interest in the asset disposed of. In the case of a
        Unitholder who purchases Units, such basis (before adjustment for
        earned original issue discount and amortized bond premium, if any) is
        determined by apportioning the cost of the Units among each of the
        Trust assets ratably according to value as of the date of acquisition
        of the Units. The tax cost reduction requirements of the Code relating
        to amortization of bond premium may, under some circumstances, result
        in the Unitholder realizing a taxable gain when his Units are sold or
        redeemed for an amount equal to his original cost;
     (3)   Any proceeds paid under an insurance policy or policies dated the
        Date of Deposit, issued to an Insured Trust by AMBAC Indemnity,
        Financial Guaranty or a combination thereof with respect to the Bonds
        which represent maturing interest on defaulted obligations held by the
        Trustee will be excludable from Federal gross income if, and to the
        same extent as, such interest would have been so excludable if paid by
        the issuer of the defaulted obligations; and
     (4)   Any proceeds paid under individual policies obtained by issuers of
        Bonds which represent maturing interest on defaulted obligations held
        by the Trustee will be excludable from Federal gross income if, and to
        the same extent as, such interest would have been excludable if paid
        in the normal course by the issuer of the defaulted obligations.

     Sections 1288 and 1272 of the Code provide a complex set of rules
governing the accrual of original issue discount. These rules provide that
original issue discount accrues either on the basis of a constant compound
interest
 <PAGE>
                                Other Matters                               59
rate or ratably over the term of the Bond, depending on the date the Bond was
issued. In addition, special rules apply if the purchase price of a Bond
exceeds the original issue price plus the amount of original issue discount
which would have previously accrued based upon its issue price (its "adjusted
issue price") to prior owners. The application of these rules will also vary
depending on the value of the Bond on the date a Unitholder acquires his Units
and the price the Unitholder pays for his Units. Investors with questions
regarding these Code sections should consult with their tax advisers.

     "The Revenue Reconciliation Act of 1993" (the "Tax Act") subjects
tax-exempt bonds to the market discount rules of the Code effective for bonds
purchased after April 30, 1993. In general, market discount is the amount (if
any) by which the stated redemption price at maturity exceeds an investor's
purchase price (except to the extent that such difference, if any, is
attributable to original issue discount not yet accrued). Market discount can
arise based on the price a Trust pays for Bonds or the price a Unitholder pays
for his or her Units. Under the Tax Act, accretion of market discount is
taxable as ordinary income; under prior law the accretion had been treated as
capital gain. Market discount that accretes while a Trust holds a Bond would
be recognized as ordinary income by the Unitholders when principal payments
are received on the Bond, upon sale or at redemption (including early
redemption), or upon the sale or redemption of his or her Units, unless a
Unitholder elects to include market discount in taxable income as it accrues.
The market discount rules are complex and Unitholders should consult their tax
advisers regarding these rules and their application.

     In the case of certain corporations, the alternative minimum tax and the
Superfund Tax for taxable years beginning after December 31, 1986 depends upon
the corporation's alternative minimum taxable income, which is the
corporation's taxable income with certain adjustments. One of the adjustment
items used in computing the alternative minimum taxable income and the
Superfund Tax of a corporation (other than an S Corporation, Regulated
Investment Company, Real Estate Investment Trust, or REMIC) is an amount equal
to 75% of the excess of such corporation's "adjusted current earnings" over an
amount equal to its alternative minimum taxable income (before such adjustment
item and the alternative tax net operating loss deduction). "Adjusted current
earnings" includes all tax exempt interest, including interest on all of the
Bonds in the Fund. Unitholders are urged to consult their tax advisers with
respect to the particular tax consequences to them including the corporate
alternative minimum tax, the Superfund Tax and the branch profits tax imposed
by Section 884 of the Code.

     Counsel for the Sponsor has also advised that under Section 265 of the
Code, interest on indebtedness incurred or continued to purchase or carry
Units of a Trust is not deductible for Federal income tax purposes. The
Internal Revenue Service has taken the position that such indebtedness need
not be directly traceable to the purchase or carrying of Units (however, these
rules generally do not apply to interest paid on indebtedness incurred to
purchase or improve a personal residence). Also, under Section 265 of the
Code, certain financial institutions that acquire Units would generally not be
able to deduct any of the interest expense attributable to ownership of such
Units. Investors with questions regarding this issue should consult with their
tax advisers.

     In the case of certain of the Bonds in the Fund, the opinions of bond
counsel indicate that interest on such Bonds received by a "substantial user"
of the facilities being financed with the proceeds of these Bonds, or persons
related thereto, for periods while such Bonds are held by such a user or
related person, will not be excludible from Federal gross income, although
interest on such Bonds received by others would be excludible from Federal
gross income. "Substantial user" and "related person" are defined under U.S.
Treasury Regulations. Any person who believes that he or she may be a
"substantial user" or a "related person" as so defined should contact his or
her tax adviser.

     In the opinion of Tanner Propp & Farber, special counsel to the Fund for
New York tax matters, under existing law, the Fund and each Trust are not
associations taxable as corporations and the income of each Trust will be
treated as the income of the Unitholders under the income tax laws of the
State and City of New York.

     All statements of law in the Prospectus concerning exclusion from gross
income for Federal, state or other tax purposes are the opinions of counsel
and are to be so construed.

     At the respective times of issuance of the Bonds, opinions relating to
the validity thereof and to the exclusion of interest thereon from Federal
gross income are rendered by bond counsel to the respective issuing
authorities. Neither the Sponsor nor Chapman and Cutler has made any special
review for the Fund of the proceedings relating to the issuance of the Bonds
or of the basis for such opinions.
 <PAGE>
60                              Other Matters

     In the case of corporations, the alternative tax rate applicable to
long-term capital gains is 35%, effective for long-term capital gains realized
in taxable years beginning on or after January 1, 1993. For taxpayers other
than corporations, net capital gains are subject to a maximum marginal stated
tax rate of 28%. However, it should be noted that legislative proposals are
introduced from time to time that affect tax rates and could affect relative
differences at which ordinary income and capital gains are taxed. Under the
Code, taxpayers must disclose to the Internal Revenue Service the amount of
tax-exempt interest earned during the year.

     Section 86 of the Code, in general, provides that 50% of Social Security
benefits are includible in gross income to the extent that the sum of
"modified adjusted gross income" plus 50% of the Social Security benefits
received exceeds a "base amount". The base amount is $25,000 for unmarried
taxpayers, $32,000 for married taxpayers filing a joint return and zero for
married taxpayers who do not live apart at all times during the taxable year
and who file separate returns. Modified adjusted gross income is adjusted
gross income determined without regard to certain otherwise allowable
deductions and exclusions from gross income and by including tax-exempt
interest. To the extent that Social Security benefits are includible in gross
income, they will be treated as any other item of gross income.

     In addition, under the Tax Act, for taxable years beginning after
December 31, 1993, up to 85% of Social Security benefits are includible in
gross income to the extent that the sum of "modified adjusted gross income"
plus 50% of Social Security benefits received exceeds an "adjusted base
amount." The adjusted base amount is $34,000 for unmarried taxpayers, $44,000
for married taxpayers filing a joint return, and zero for married taxpayers
who do not live apart at all times during the taxable year and who file
separate returns.

     Although tax-exempt interest is included in modified adjusted gross
income solely for the purpose of determining what portion, if any, of Social
Security benefits will be included in gross income, no tax-exempt interest,
including that received from a Trust, will be subject to tax. A taxpayer whose
adjusted gross income already exceeds the base amount or the adjusted base
amount must include 50% or 85%, respectively, of his Social Security benefits
in gross income whether or not he receives any tax-exempt interest. A taxpayer
whose modified adjusted gross income (after inclusion of tax-exempt interest)
does not exceed the base amount need not include any Social Security benefits
in gross income.

     For a discussion of the state tax status of income earned on Units of a
Trust, see "Tax Status" for the applicable Trust. Except as noted therein, the
exemption of interest on state and local obligations for Federal income tax
purposes discussed above does not necessarily result in exemption under the
income or other tax laws of any State or City. The laws of the several States
vary with respect to the taxation of such obligations.
 <PAGE>
                                Other Matters                               61

DESCRIPTION OF SECURITIES RATINGS*

      STANDARD & POOR'S CORPORATION. A Standard & Poor's Corporation
("Standard & Poor's") corporate or municipal bond rating is a current
assessment of the creditworthiness of an obligor with respect to a specific
debt obligation. This assessment of creditworthiness may take into
consideration obligors such as guarantors, insurers or lessees.

     The bond rating is not a recommendation to purchase or sell a security,
inasmuch as it does not comment as to market price.

     The ratings are based on current information furnished to Standard &
Poor's by the issuer and obtained by Standard & Poor's from other sources it
considers reliable. The ratings may be changed, suspended or withdrawn as a
result of changes in, or unavailability of, such information.

     The ratings are based, in varying degrees, on the following
considerations:

      I. Likelihood of default--capacity and willingness of the obligor as to
       the timely payment of interest and repayment of principal in accordance
       with the terms of the obligation.

     II. Nature of and provisions of the obligation.

     III. Protection afforded by, and relative position of, the obligation in
       the event of bankruptcy, reorganization or other arrangements under the
       laws of bankruptcy and other laws affecting creditors' rights.

     AAA--This is the highest rating assigned by Standard & Poor's to a debt
obligation and indicates an extremely strong capacity to pay principal and
interest.

     AA--Bonds rated AA also qualify as high-quality debt obligations.
Capacity to pay principal and interest is very strong, and in the majority of
instances they differ from AAA issues only in small degree.

     A--Bonds rated A have a strong capacity to pay principal and interest,
although they are somewhat more susceptible to the adverse effects of changes
in circumstances and economic conditions.

     BBB--Bonds rated BBB are regarded as having an adequate capacity to pay
interest and repay principal. Whereas they normally exhibit adequate
protection parameters, adverse economic conditions or changing circumstances
are more likely to lead to a weakened capacity to pay interest and repay
principal for debt in this category than in higher rated categories.

     Plus (+) or Minus (-): To provide more detailed indications of credit
quality, the ratings from "AA" to "BBB" may be modified by the addition of a
plus or minus sign to show relative standing within the major rating
categories.

     Provisional Ratings: A provisional rating ("p") assumes the successful
completion of the project being financed by the issuance of the bonds being
rated and indicates that payment of debt service requirements is largely or
entirely dependent upon the successful and timely completion of the project.
This rating, however, while addressing credit quality subsequent to
completion, makes no comment on the likelihood of, or the risk of default upon
failure of, such completion. Accordingly, the investor should exercise his own
judgment with respect to such likelihood and risk.

     MOODY'S INVESTORS SERVICE, INC. A brief description of the applicable
Moody's Investors Service, Inc. ("Moody's") rating symbols and their meanings
follows:

     Aaa--Bonds which are rated Aaa are judged to be the best quality. They
carry the smallest degree of investment risk and are generally referred to as
"gilt edge". Interest payments are protected by a large, or by an
exceptionally stable, margin and principal is secure. While the various
protective elements are likely to change, such changes as can be visualized
are most unlikely to impair the fundamentally strong position of such issues.
With the occasional exception of oversupply in a few specific instances, the
safety of obligations of this class is so absolute that their market value is
affected solely by money market fluctuations.

     Aa--Bonds which are rated Aa are judged to be of high quality by all
standards. Together with the Aaa group they comprise what are generally known
as high grade bonds. They are rated lower than the best bonds because margins
of protection may not be as large as in Aaa securities or fluctuations of
protective elements may be of greater amplitude or there may be other elements
present which make the long-term risks appear somewhat larger than in
*As published by the rating companies.
 <PAGE>
62                              Other Matters
Aaa securities. These Aa bonds are high grade, their market value virtually
immune to all but money market influences, with the occasional exception of
oversupply in a few specific instances.

     A--Bonds which are rated A possess many favorable investment attributes
and are to be considered as higher medium grade obligations. Factors giving
security to principal and interest are considered adequate, but elements may
be present which suggest a susceptibility to impairment sometime in the
future. The market value of A-rated bonds may be influenced to some degree by
credit circumstances during a sustained period of depressed business
conditions. During periods of normalcy, bonds of this quality frequently move
in parallel with Aaa and Aa obligations, with the occasional exception of
oversupply in a few specific instances.

     Baa--Bonds which are rated Baa are considered as medium grade
obligations; i.e., they are neither highly protected nor poorly secured.
Interest payments and principal security appear adequate for the present but
certain protective elements may be lacking or may be characteristically
unreliable over any great length of time. Such bonds lack outstanding
investment characteristics and in fact have speculative characteristics as
well.

     Moody's bond rating symbols may contain numerical modifiers of a generic
rating classification. The modifier 1 indicates that the bond ranks at the
high end of its category; the modifier 2 indicates a mid-range ranking; and
the modifier 3 indicates that the issue ranks in the lower end of its generic
rating category.

     Con--Bonds for which the security depends upon the completion of some act
or the fulfillment of some condition are rated conditionally. These are bonds
secured by (a) earnings of projects under construction, (b) earnings of
projects unseasoned in operating experience, (c) rentals which begin when
facilities are completed, or (d) payments to which some other limiting
condition attaches. Parenthetical rating denotes probable credit stature upon
completion of construction or elimination of basis of condition.

 <PAGE>
                                Other Matters                               63

              REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS
   
   To the Board of Directors of Van Kampen Merritt Inc. and the Unitholders
   of Insured Municipals Income Trust, 155th Insured Multi-Series (IM-IT,
   IM-IT Short Intermediate, Florida IM-IT Intermediate Laddered Maturity
   and Pennsylvania IM-IT Trusts):

        We have audited the accompanying statements of condition and the
   related portfolios of Insured Municipals Income Trust, 155th Insured
   Multi-Series (IM-IT, IM-IT Short Intermediate, Florida IM-IT
   Intermediate Laddered Maturity and Pennsylvania IM-IT Trusts) as of
   February 24, 1994. The statements of condition and portfolios are the
   responsibility of the Sponsor. Our responsibility is to express an
   opinion on such financial statements based on our audit.
    
        We conducted our audit 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. Our procedures included
   confirmation of irrevocable letters of credit deposited to purchase
   tax-exempt securities by correspondence with the Trustee. An audit also
   includes assessing the accounting principles used and significant
   estimates made by the Sponsor, as well as evaluating the overall
   financial statement presentation. We believe our audit provides a
   reasonable basis for our opinion.
   
        In our opinion, the financial statements referred to above present
   fairly, in all material respects, the financial position of Insured
   Municipals Income Trust, 155th Insured Multi-Series (IM-IT, IM-IT Short
   Intermediate, Florida IM-IT Intermediate Laddered Maturity and
   Pennsylvania IM-IT Trusts) as of February 24, 1994, in conformity with
   generally accepted accounting principles.

   Chicago, Illinois                                        GRANT THORNTON

   February 24, 1994
    
 <PAGE>
64                              Other Matters
   
<TABLE>
                       INSURED MUNICIPALS INCOME TRUST
                          155TH INSURED MULTI-SERIES

                           STATEMENTS OF CONDITION

                 AS OF THE DATE OF DEPOSIT: FEBRUARY 24, 1994
<CAPTION>

                                                                                                   FLORIDA
                                                                                                    IM-IT
                                                                                IM-IT SHORT     INTERMEDIATE
                                                                               INTERMEDIATE       LADDERED       PENNSYLVANIA
    INVESTMENT IN SECURITIES                                      IM-IT            TRUST       MATURITY TRUST     IM-IT TRUST
<S>                                                           <C>              <C>              <C>              <C>
Contracts to purchase tax-exempt securities <F1><F2><F4>...   $   9,403,211    $   5,985,039    $   2,974,860    $   2,877,561
Accrued interest to the First Settlement Date <F1><F4>.....          67,317           34,369           15,063           24,186
         Total.............................................   $   9,470,528    $   6,019,408    $   2,989,923    $   2,901,747
    LIABILITY AND INTEREST OF UNITHOLDERS
Liability--
  Accrued interest payable to Sponsor <F1><F4>.............   $         --     $          --    $          --    $          --
Interest of Unitholders--
      Cost to investors <F3>...............................       9,955,000        6,204,448        3,081,900        3,050,000
  Less: Gross underwriting commission <F3>.................         484,472          185,040           91,977          148,253
         Net interest to Unitholders <F1><F3><F4>..........       9,470,528        6,019,408        2,989,923        2,901,747
         Total.............................................   $   9,470,528    $   6,019,408    $   2,989,923    $   2,901,747

<FN>
<F1> The aggregate value of the Securities listed under "Portfolio" for each
     Trust herein, and their cost to such Trust are the same. The value of the
     Securities is determined by Interactive Data Services, Inc. on the bases
     set forth under "Unitholder Explanations--Public Offering--Offering
     Price". The contracts to purchase tax-exempt Securities are
     collateralized by irrevocable letters of credit which have been deposited
     with the Trustee in and for the following amounts:

                                                                                  OFFERING        ACCRUED
                                                                   PRINCIPAL        PRICE       INTEREST TO
                                                    AMOUNT OF      AMOUNT OF      OF BONDS       EXPECTED
                                                    LETTER OF     BONDS UNDER       UNDER        DELIVERY
                                                     CREDIT        CONTRACTS      CONTRACTS        DATES
IM-IT...........................................  $   9,469,422  $   9,825,000  $   9,403,211   $    66,211
IM-IT Short Intermediate Trust..................  $   6,019,388  $   6,030,000  $   5,985,039   $    34,349
Florida IM-IT Intermediate
 Laddered Maturity Trust........................  $   2,990,608  $   3,000,000  $   2,974,860   $    15,748
Pennsylvania IM-IT Trust........................  $   2,901,204  $   3,010,000  $   2,877,561   $    23,643

<F2> Insurance coverage providing for timely payment, when due, of all
     principal and interest on the Bonds in the Insured Trusts has been
     obtained either by such Trusts, by a prior owner of the Bonds or by the
     issuers of the Bonds involved. Such insurance does not guarantee the
     market value of the Bonds or the value of the Units. The insurance
     obtained by the Insured Trusts is effective only while Bonds thus insured
     are held in such Trusts. Neither the bid nor offering prices of the
     underlying Bonds or of the Units, absent situations in which bonds are in
     default in payment of principal or interest or in significant risk of
     such default, include value, if any, attributable to the insurance
     obtained by such Trusts.
<F3> The aggregate public offering price (exclusive of interest) and the
     aggregate sales charge are computed on the bases set forth under
     "Unitholder Explanations--Public Offering--Offering Price" and "Trust
     Administration--General-- Sponsor and Underwriter Profits" and assume all
     single transactions involve less than 100 Units. For single transactions
     involving 100 or more Units, the sales charge is reduced (see "Unitholder
     Explanations--Public Offering--General") resulting in an equal reduction
     in both the Cost to investors and the Gross underwriting commission while
     the Net interest to Unitholders remains unchanged.
<F4> Accrued interest on the underlying Securities represents the interest
     accrued as of the First Settlement Date from the later of the last
     payment date on the Securities or the date of issuance thereof. The
     Trustee may advance to the Trust a portion of the accrued interest on the
     underlying Securities for distribution to the Sponsor as the Unitholder
     of record as of the First Settlement Date. A portion of the accrued
     interest ("Purchased Interest") on the underlying Securities, as
     indicated under "Summary of Essential Financial Information", is payable
     by investors and is included in the Public Offering Price. Purchased
     Interest is the difference between Accrued interest to the First
     Settlement Date and Accrued interest payable to Sponsor.
</TABLE>
    
 <PAGE>
                                Other Matters                               65

EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN TABLES

     As of the date of this prospectus, the following tables show the
approximate taxable estimated current returns for individuals that are
equivalent to tax-exempt estimated current returns under combined Federal and
State taxes (where applicable) using the published Federal and State tax rates
(where applicable) scheduled to be in effect in 1994. They incorporate
increased tax rates for higher income taxpayers that were included in the
Revenue Reconciliation Act of 1993. These tables illustrate approximately what
you would have to earn on taxable investments to equal the tax-exempt
estimated current return in your income tax bracket. For cases in which more
than one State bracket falls within a Federal bracket, the highest State
bracket is combined with the Federal bracket. The combined State and Federal
tax rates shown reflect the fact that State tax payments are currently
deductible for Federal tax purposes. The tables do not show the approximate
taxable estimated current returns for individuals that are subject to the
alternative minimum tax. The taxable equivalent estimated current returns may
be somewhat higher than the equivalent returns indicated in the following
tables for those individuals who have adjusted gross incomes in excess of
$111,800. The tables do not reflect the effect of limitations on itemized
deductions and the deduction for personal exemptions. They were designed to
phase out certain benefits of these deductions for higher income taxpayers.
These limitations, in effect, raise the marginal maximum Federal tax rate to
approximately 44 percent for taxpayers filing a joint return and entitled to
four personal exemptions and to approximately 41 percent for taxpayers filing
a single return entitled to only one personal exemption. These limitations are
subject to certain maximums, which depend on the number of exemptions claimed
and the total amount of the taxpayer's itemized deductions. For example, the
limitation on itemized deductions will not cause a taxpayer to lose more than
80% of his allowable itemized deductions, with certain exceptions. See "Other
Matters--Federal Tax Status" for a more detailed discussion of recent Federal
tax legislation, including a discussion of provisions affecting corporations.
   
<TABLE>
IM-IT
<CAPTION>

  TAXABLE INCOME ($1,000'S)                             TAX-EXEMPT ESTIMATED CURRENT RETURN
   SINGLE            JOINT          TAX
   RETURN           RETURN        BRACKET     5%     5 1/2%     6%     6 1/2%     7%     7 1/2%     8%
                                                    EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN
<S>              <C>              <C>        <C>      <C>      <C>     <C>      <C>      <C>      <C>
$    0 -  22.80  $    0 -  38.00    15%      5.88%    6.47%    7.06%    7.65%    8.24%    8.82%    9.41%
 22.80 -  55.10   38.00 -  91.90    28       6.94     7.64     8.33     9.03     9.72    10.42    11.11
 55.10 - 115.00   91.90 - 140.00    31       7.25     7.97     8.70     9.42    10.14    10.87    11.59
115.00 - 250.00  140.00 - 250.00    36       7.81     8.59     9.38    10.16    10.94    11.72    12.50
  Over 250.00      Over 250.00    39.6       8.28     9.11     9.93    10.76    11.59    12.42    13.25
</TABLE>

<TABLE>
SHORT INTERMEDIATE
<CAPTION>

  TAXABLE INCOME ($1,000'S)                             TAX-EXEMPT ESTIMATED CURRENT RETURN
   SINGLE            JOINT          TAX
   RETURN           RETURN        BRACKET   3 1/2%     4%     4 1/2%     5%     5 1/2%     6%     6 1/2%
                                                    EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN
<S>              <C>              <C>        <C>      <C>      <C>      <C>      <C>      <C>     <C>
$    0 -  22.80  $    0 -  38.00    15%      4.12%    4.71%    5.29%    5.88%    6.47%    7.06%    7.65%
 22.80 -  55.10   38.00 -  91.90    28       4.86     5.56     6.25     6.94     7.64     8.33     9.03
 55.10 - 115.00   91.90 - 140.00    31       5.07     5.80     6.52     7.25     7.97     8.70     9.42
115.00 - 250.00  140.00 - 250.00    36       5.47     6.25     7.03     7.81     8.59     9.38    10.16
  Over 250.00      Over 250.00    39.6       5.79     6.62     7.45     8.28     9.11     9.93    10.76
</TABLE>

<TABLE>
FLORIDA INTERMEDIATE LADDERED MATURITY
<CAPTION>

  TAXABLE INCOME ($1,000'S)                             TAX-EXEMPT ESTIMATED CURRENT RETURN
   SINGLE            JOINT          TAX
   RETURN           RETURN        BRACKET*    4%     4 1/2%     5%     5 1/2%     6%     6 1/2%     7%
                                                    EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN
<S>              <C>              <C>        <C>      <C>      <C>      <C>      <C>     <C>      <C>
$    0 -  22.80  $    0 -  38.00    15%      4.71%    5.29%    5.88%    6.47%    7.06%    7.65%    8.24%
 22.80 -  55.10   38.00 -  91.90    28       5.56     6.25     6.94     7.64     8.33     9.03     9.72
 55.10 - 115.00   91.90 - 140.00    31       5.80     6.52     7.25     7.97     8.70     9.42    10.14
115.00 - 250.00  140.00 - 250.00    36       6.25     7.03     7.81     8.59     9.38    10.16    10.94
  Over 250.00      Over 250.00    39.6       6.62     7.45     8.28     9.11     9.93    10.76    11.59
</TABLE>

*The State of Florida imposes no income tax on individuals; accordingly, the
table reflects only exemption from Federal income taxes. The table does not
reflect the exemption of Units of the Florida IM-IT Intermediate Laddered
Maturity Trust from the State's intangible tax; accordingly, Florida residents
subject to such tax would need a somewhat higher taxable estimated current
return than those shown to equal the tax-exempt estimated current return of
the Florida IM-IT Intermediate Laddered Maturity Trust.
 <PAGE>
66                              Other Matters

<TABLE>
PENNSYLVANIA
<CAPTION>

  TAXABLE INCOME ($1,000'S)                             TAX-EXEMPT ESTIMATED CURRENT RETURN
   SINGLE            JOINT          TAX
   RETURN           RETURN        BRACKET*  4 1/2%     5%     5 1/2%     6%     6 1/2%     7%     7 1/2%
                                                    EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN
<S>              <C>              <C>        <C>      <C>      <C>     <C>      <C>      <C>      <C>
$    0 -  22.80  $    0 -  38.00  17.4%      5.45%    6.05%    6.66%    7.26%    7.87%    8.47%    9.09%
 22.80 -  55.10   38.00 -  91.90    30       6.43     7.14     7.86     8.57     9.29    10.00    10.71
 55.10 - 115.00   91.90 - 140.00  32.9       6.71     7.45     8.20     8.94     9.69    10.43    11.18
115.00 - 250.00  140.00 - 250.00  37.8       7.23     8.04     8.84     9.65    10.45    11.25    12.06
  Over 250.00      Over 250.00    41.3       7.67     8.52     9.37    10.22    11.07    11.93    12.78
</TABLE>
    
*The table does not reflect the effect of the exemption of the Trust from
local personal property taxes and from the Philadelphia School District
Investment Net Income Tax, accordingly; residents of Pennsylvania subject to
such taxes would need a higher taxable estimated current return than those
shown to equal the tax-exempt estimated current return of the Trust.

     A comparison of tax-free and equivalent taxable estimated current returns
with the returns on various taxable investments is one element to consider in
making an investment decision. The Sponsor may from time to time in its
advertising and sales materials compare the then current estimated returns on
the Trusts and returns over specified periods on other similar Van Kampen
Merritt sponsored unit investment trusts with returns on taxable investments
such as corporate or U.S. Government bonds, bank CDs and money market accounts
or money market funds, each of which has investment characteristics that may
differ from those of the Trusts. U.S. Government bonds, for example, are
backed by the full faith and credit of the U.S. Government and bank CDs and
money market accounts are insured by an agency of the federal government.
Money market accounts and money market funds provide stability of principal,
but pay interest at rates that vary with the condition of the short-term debt
market. The investment characteristics of the Trusts are described more fully
elsewhere in this Prospectus.
 <PAGE>
                                Other Matters                               67

ESTIMATED CASH FLOWS TO UNITHOLDERS

     The tables below set forth the per Unit estimated distributions of
interest, principal and rebates of Purchased Interest to Unitholders. The
tables assume no changes in expenses, no changes in the current interest
rates, no exchanges, redemptions, sales or prepayments of the underlying
Securities prior to maturity or expected retirement date and the receipt of
principal upon maturity or expected retirement date. To the extent the
foregoing assumptions change actual distributions will vary.
   
<TABLE>
IMIT

     MONTHLY
<CAPTION>

                                                                       ESTIMATED
                                           ESTIMATED    ESTIMATED      PURCHASED      ESTIMATED
           DISTRIBUTION DATES              INTEREST     PRINCIPAL      INTEREST         TOTAL
              (EACH MONTH)                DISTRIBUTION DISTRIBUTION     REBATE       DISTRIBUTION
<S>           <C>                      <C>    <C>         <C>              <C>          <C>
April         1994                            4.01                                        4.01
May           1994  - May              2006   4.30                                        4.30
June          2006                            4.30        100.45            .73         105.48
July          2006  - December         2015   3.83                                        3.83
January       2016                            3.83         30.13            .21          34.17
February      2016  - December         2016   3.69                                        3.69
January       2017                            3.69        150.68           1.10         155.47
February      2017  - June             2017   2.99                                        2.99
July          2017                            2.99        100.45            .73         104.17
August        2017  - August           2018   2.52                                        2.52
September     2018                            2.52         15.07                         17.59
October       2018  - April            2020   2.52                                        2.52
May           2020                            2.52         27.62                         30.14
June          2020  - August           2020   2.53                                        2.53
September     2020                            2.53        100.46            .71         103.70
October       2020  - June             2021   2.07                                        2.07
July          2021                            2.07        100.45            .70         103.22
August        2021  - August           2022   1.62                                        1.62
September     2022                            1.24        150.68           1.09         153.01
October       2022  - June             2023    .92                                         .92
July          2023                             .80         50.22            .36          51.38
August        2023  - February         2027    .69                                         .69
March         2027                             .54         60.27            .42          61.23
April         2027  - November         2028    .42                                         .42
December      2028                             .42        100.46            .71         101.59
</TABLE>

                                        




 <PAGE>
68                              Other Matters

<TABLE>
IM-IT SHORT INTERMEDIATE TRUST

     MONTHLY
<CAPTION>

                                                                       ESTIMATED
                                           ESTIMATED    ESTIMATED      PURCHASED      ESTIMATED
           DISTRIBUTION DATES              INTEREST     PRINCIPAL      INTEREST         TOTAL
              (EACH MONTH)                DISTRIBUTION DISTRIBUTION     REBATE       DISTRIBUTION
<S>           <C>    <C>            <C>       <C>         <C>              <C>          <C>
April         1994                            $ 2.97                                    $  2.97
May           1994 - November       1997        3.19                                       3.19
December      1997                              3.19      $ 33.16          $.24           36.59
January       1998 - May            1998        3.05                                       3.05
June          1998                              3.05       248.76          1.48          253.29
July          1998                              2.21        91.21           .24           93.66
August        1998 - November       1998        2.08                                       2.08
December      1998                              2.08       133.50           .81          136.39
January       1999 - April          1999        1.62                                       1.62
May           1999                              1.62       149.25           .95          151.82
June          1999                              1.07        41.46           .28           42.81
July          1999                               .91       186.57          1.00          188.48
August        1999 - February       2000         .35                                        .35
March         2000                               .35       116.09           .70          117.14
</TABLE>
 <PAGE>
                                Other Matters                               69

<TABLE>
FLORIDA IM-IT INTERMEDIATE LADDERED MATURITY TRUST

     MONTHLY
<CAPTION>

                                                                       ESTIMATED
                                           ESTIMATED    ESTIMATED      PURCHASED      ESTIMATED
           DISTRIBUTION DATES              INTEREST     PRINCIPAL      INTEREST         TOTAL
              (EACH MONTH)                DISTRIBUTION DISTRIBUTION     REBATE       DISTRIBUTION
<S>           <C>    <C>            <C>       <C>         <C>              <C>          <C>
April         1994                            $ 3.28                                    $  3.28
May           1994 - November       2000        3.52                                       3.52
December      2000                              3.52      $200.00          $.97          204.49
January       2001 - November       2001        2.82                                       2.82
December      2001                              2.82       200.00           .96          203.78
January       2002 - June           2002        2.14                                       2.14
July          2002                              2.14       200.00          1.02          203.16
August        2002 - September      2003        1.41                                       1.41
October       2003                              1.41       200.00          1.02          202.43
November      2003 - July           2004         .68                                        .68
August        2004                               .68       200.00          1.05          201.73
</TABLE>
 <PAGE>
70                              Other Matters
<TABLE>
PENNSYLVANIA IM-IT TRUST

     MONTHLY
<CAPTION>
                                                                    ESTIMATED
                                  ESTIMATED        ESTIMATED        PURCHASED       ESTIMATED
DISTRIBUTION DATES                 INTEREST        PRINCIPAL        INTEREST          TOTAL
(EACH MONTH)                     DISTRIBUTION    DISTRIBUTION        REBATE        DISTRIBUTION
<S>       <C>     <C>        <C>    <C>               <C>           <C>              <C>
April     1994                      3.93                                               3.93
May       1994  - September  2004   4.22                                               4.22
October   2004                      4.22               32.78         .30              37.30
November  2004  - June       2018   4.05                                               4.05
July      2018                      4.05               32.79         .26              37.10
August    2018  - November   2018   3.91                                               3.91
December  2018                      3.92               16.39                          20.31
January   2019  - November   2021   3.92                                               3.92
December  2021                      3.61              134.43        1.05             139.09
January   2022  - June       2022   3.35                                               3.35
July      2022                      3.35              180.33        1.45             185.13
August    2022  - June       2023   2.56                                               2.56
July      2023                      2.16              327.87        2.75             332.78
August    2023  - May        2024   1.08                                               1.08
June      2024                      1.08               98.36         .76             100.20
July      2024  - February   2027    .67                                                .67
March     2027                       .28              163.93        1.36             165.57
</TABLE>
    

 <PAGE>
                     [THIS PAGE INTENTIONALLY LEFT BLANK]
 <PAGE>
No person is authorized to give any information or to make any representations
not contained in this Prospectus; and any information or representation not
contained herein must not be relied upon as having been authorized by the
Fund, the Sponsor or the Underwriters. This Prospectus does not constitute an
offer to sell, or a solicitation of an offer to buy, securities in any state
to any person to whom it is not lawful to make such offer in such state.

          Title                                         Page
INTRODUCTION.....................................          2
SUMMARY OF ESSENTIAL FINANCIAL INFORMATION.......          3
UNITHOLDER EXPLANATIONS..........................          5
 Settlement of Bonds in the Trusts...............          5
   The Fund......................................          5
   Objectives and Securities Selection...........          6
   Portfolio Concentrations......................          8
   Replacement Bonds.............................         10
   Bond Redemptions..............................         11
   Distributions.................................         12
   Certificates..................................         12
 Estimated Current Returns and Estimated
   Long-Term Returns.............................         12
 Interest Earning Schedule.......................         13
   Calculation of Estimated Net Annual Interest
     Income......................................         13
 Purchased and Accrued Interest..................         14
   Purchased Interest............................         14
   Accrued Interest..............................         14
 Public Offering.................................         14
   General.......................................         14
   Offering Price................................         15
   Market for Units..............................         17
   Distributions of Interest and Principal.......         17
   Reinvestment Option...........................         18
   Redemption of Units...........................         18
   Reports Provided..............................         20
 Insurance on the Bonds in the Insured Trusts....         20
   
IM-IT............................................         27
IM-IT SHORT INTERMEDIATE TRUST...................         29
FLORIDA IM-IT INTERMEDIATE LADDERED MATURITY
 TRUST...........................................         32
PENNSYLVANIA IM-IT TRUST.........................         38
    
NOTES TO PORTFOLIOS..............................         44
UNDERWRITING.....................................         46
TRUST ADMINISTRATION.............................         49
 Fund Administration and Expenses................         49
   Sponsor.......................................         49
   Compensation of Sponsor and Evaluator.........         52
   Trustee.......................................         52
   Trustee's Fee.................................         53
   Portfolio Administration......................         53
   Sponsor Purchases of Units....................         54
   Insurance Premiums............................         54
   Miscellaneous Expenses........................         54
 General.........................................         54
   Amendment or Termination......................         54
   Limitation on Liabilities.....................         55
   Unit Distribution.............................         56
   Sponsor and Underwriter Compensation..........         56
OTHER MATTERS....................................         58
 Legal Opinions..................................         58
 Independent Certified Public Accountants........         58
FEDERAL TAX STATUS...............................         58
DESCRIPTION OF SECURITIES RATINGS................         61
REPORT OF INDEPENDENT CERTIFIED PUBLIC
 ACCOUNTANTS.....................................         62
STATEMENTS OF CONDITION..........................         63
EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN
 TABLES..........................................         64
ESTIMATED CASH FLOWS TO UNITHOLDERS..............         66

This Prospectus contains information concerning the Fund and the Sponsor, but
does not contain all of the information set forth in the registration
statements and exhibits relating thereto, which the fund has filed with the
Securities and Exchange Commission, Washington, D.C., under the Securities Act
of 1933 and the Investment Company Act of 1940, and to which reference is
hereby made.

(R) denotes a registered trademark of Van Kampen Merritt Inc.

          P  R  O  S  P  E  C  T  U  S
   
          February 24, 1994
    
          LOGO
   
          INSURED MUNICIPALS INCOME TRUST, 155TH INSURED MULTI-SERIES

          IM-IT 318

          IM-IT 90th Short Intermediate

          Florida IM-IT Intermediate
             Laddered Maturity Series 6

          Pennsylvania IM-IT 182
    
          LOGO
 <PAGE>
         One Parkview Plaza        (R)
         Oakbrook Terrace, Illinois 60181
         Mellon Bank Center
         1735 Market Street, Suite 1300
         Philadelphia, Pennsylvania 19103
         Please retain this Prospectus for future reference.
 <PAGE>
                   Contents of Registration Statement
     
     This  Amendment  of Registration Statement comprises  the  following
papers and documents:

     The facing sheet
     The Cross-Reference sheet
     The Prospectus
     The Signatures
     The consents of independent public accountants, ratings
        services and legal counsel

The following exhibits:

1.1  Copy of Trust Agreement.

1.5  Copy of Agreement Among Underwriters.

3.1  Opinion  and  consent of counsel as to legality of securities  being
     registered.

3.2  Opinion  of counsel as to Federal and Florida income tax  status  of
     securities being registered.

3.3  Opinion  and consent of counsel as to income tax status of the  Fund
     under New York law.

3.4  Opinion  and  consent  of  counsel  as  to  income  tax  status   to
     Pennsylvania residents of Units of the Pennsylvania IM-IT Trust.

4.1  Consent of Interactive Data Services, Inc.

4.2  Consent of Standard & Poor's Corporation.

4.3  Consent of Grant Thornton.

                               Signatures
     
     The Registrant, Insured Municipals Income Trust, 155th Insured Multi-
Series  hereby identifies Insured Municipals Income Trust,  77th  Insured
Multi-Series  and Insured Municipals Income Trust and Investors'  Quality
Tax-Exempt  Trust,  Multi-Series 189 for purposes of the  representations
required  by  Rule  487  and  represents the  following:   (1)  that  the
portfolio  securities  deposited in the series as to  the  securities  of
which this Registration Statement is being filed do not differ materially
in  type  or  quality from those deposited in such previous  series;  (2)
that,  except to the extent necessary to identify the specific  portfolio
securities  deposited in, and to provide essential financial  information
for, the series with respect to the securities of which this Registration
Statement  is being filed, this Registration Statement does  not  contain
disclosures  that differ in any material respect from those contained  in
the  registration statements for such previous series  as  to  which  the
effective  date  was determined by the Commission or the staff;  and  (3)
that it has complied with Rule 460 under the Securities Act of 1933.
     
     Pursuant  to  the requirements of the Securities Act  of  1933,  the
Registrant,  Insured Municipals Income Trust, 155th Insured  Multi-Series
has duly caused this Amendment to the Registration Statement to be signed
on  its behalf by the undersigned, thereunto duly authorized, in the City
of Chicago and State of Illinois on the 24th day of February, 1994.

                                    Insured Municipals Income Trust
                                      155th Insured Multi-Series
                                    
                                    By Van Kampen Merritt Inc.
                                    
                                    
                                    By Sandra A. Waterworth
                                       Vice President
     
     Pursuant  to  the requirements of the Securities Act of  1933,  this
Amendment  to  the Registration Statement has been signed  below  by  the
following persons in the capacities indicated and on February 24, 1994.

 Signature                 Title

John C. Merritt     Chairman, Chief Executive  )
                      Officer and Director     )

William R. Rybak    Senior Vice President and  )
                      Chief Financial Officer  )

Ronald A. Nyberg    Director                   )

William R. Molinari Director                   )
                                                Sandra A. Waterworth
                                                (Attorney-in-fact*)

*An executed copy of each of the related powers of attorney was
filed with the Securities and Exchange Commission in connection with
the Registration Statement  on Form S-6 of Insured Municipals Income
Trust and Investors' Quality Tax-Exempt Trust, Multi-Series 203
(File No. 33-65744) and the same are hereby incorporated herein by
this reference.

                                                           Exhibit 1.1
                                   --
                     Insured Municipals Income Trust
                       155th Insured Multi-Series
                                    
                             Trust Agreement
                                    
                                                Dated:  February 24, 1994
     
     This  Trust Agreement between Van Kampen Merritt Inc., as Depositor,
American Portfolio Evaluation Services, a division of Van Kampen  Merritt
Investment  Advisory Corp., as Evaluator, and The Bank of  New  York,  as
Trustee,  sets  forth certain provisions in full and  incorporates  other
provisions  by  reference  to the document entitled  "Insured  Municipals
Income Trust, Standard Terms and Conditions of Trust, Effective July  29,
1987  for 36th Insured Multi-Series and Subsequent Series" (herein called
the "Standard Terms and Conditions of Trust"), and such provisions as are
set  forth  in full and such provisions as are incorporated by  reference
constitute  a  single instrument.  All references herein to Articles  and
Sections  are  to  Articles  and  Sections  of  the  Standard  Terms  and
Conditions of Trust.
                                    
                                    
                            Witnesseth That:
     
     In consideration of the premises and of the mutual agreements herein
contained, the Depositor and the Trustee agree as follows:
                                    
                                    
                                 Part I
                                    
                                    
                 Standard Terms and Conditions of Trust
     
     Subject  to  the  provisions of Part II hereof, all  the  provisions
contained  in  the  Standard Terms and Conditions  of  Trust  are  herein
incorporated by reference in their entirety and shall be deemed to  be  a
part  of  this instrument as fully and to the same extent as though  said
provisions had been set forth in full in this instrument.
                                    
                                    
                                 Part II
                                    
                                    
                  Special Terms and Conditions of Trust
     
     The following special terms and conditions are hereby agreed to:
     
          (a)    The  Bonds  defined in Section  1.01(4)  listed  in  the
     Schedules hereto have been deposited in the Trusts under this  Trust
     Agreement.
     
          (b)   The fractional undivided interest in and ownership of the
     various  Trusts represented by each Unit thereof is the  amount  set
     forth  under  "Summary of Essential Financial Information-Fractional
     Undivided Interest in the Trust per Unit" in the Prospectus.
     
          (c)    The approximate amounts, if any, which the Trustee shall
     be  required to advance out of its own funds and cause to be paid to
     the  Depositor pursuant to Section 3.05 shall be the amount per Unit
     that the Trustee agreed to reduce its fee or pay Trust expenses  set
     forth  in the footnotes to the "Per Unit Information" for each Trust
     in  the  Prospectus times the number of units in such Trust referred
     to in Part II (b) of this Trust Agreement.
     
         (d)   The First General Record Date and the amount of the second
     distribution of funds from the Interest Account of each Trust  shall
     be the record date for the Interest Account and the amount set forth
     under "Interest Earning Schedule" in the Prospectus.
     
          (e)    The  First Settlement Date shall be the date  set  forth
     under "Summary of Essential Financial Information - First Settlement
     Date" in the Prospectus.
     
          (f)    Any monies held to purchase "when-issued" bonds will  be
     held in noninterest bearing accounts.
     
          (g)    The  Evaluation Time for purpose of  sale,  purchase  or
     redemption of Units shall be 4:00 P.M. Eastern Time.
     
          (h)    The  face  of  the  form of  the  Certificates  will  be
     substantially as follows:
                                    
        No.__________ Certificate of Ownership ___________ Units
                             --Evidencing--
                          An Undivided Interest
                                 --In--
     
     This  is  to  certify that _____________ is the owner and registered
holder of this Certificate evidencing the ownership of ___________  units
of  fractional  undivided  interest  in  the  above-named  Trust  created
pursuant to the Indenture, a copy of which is available at the office  of
the  Trustee.   This Certificate is issued under and is  subject  to  the
terms, provisions and conditions of the Indenture to which the Holder  of
this Certificate by virtue of the acceptance hereof assents and is bound,
a  summary of which Indenture is contained in the Prospectus relating  to
the  Trust.  This Certificate is transferable and interchangeable by  the
registered  owner  in person or by his duly authorized  attorney  at  the
Trustee's office upon surrender of this Certificate properly endorsed  or
accompanied  by a written instrument of transfer and any other  documents
that  the Trustee may require for transfer, in form satisfactory  to  the
Trustee and payment of the fees and expenses provided in the Indenture.
     
     Witness the facsimile signature of a duly authorized officer of  the
Sponsor  and  the  manual  signature of an authorized  signatory  of  the
Trustee.

        Dated:

Van Kampen Merritt Inc.             The Bank of New York
    Depositor                          Trustee

By _______________________________  By ______________________________
  Chairman                            Authorized Signatory

     
          (i)    Section  8.02(d)  and  (e) of  the  Standard  Terms  and
     Conditions  of  Trust  are  hereby  stricken  and  replaced  by  the
     following:
          
               (d)   distribution to each Certificateholder of such Trust
          such  holder's  pro rata share of the balance of  the  Interest
          Account of such Trust;
          
               (e)   distribution to each Certificateholder of such Trust
          such  holder's  pro rata share of the balance of the  Principal
          Account of such Trust; and
          
          In  Witness  Whereof, Van Kampen Merritt Inc. has  caused  this
     Trust  Agreement  to  be executed by one of its Vice  Presidents  or
     Assistant  Vice  Presidents  and its corporate  seal  to  be  hereto
     affixed  and attested by its Secretary or one of its Vice Presidents
     or Assistant Secretaries, American Portfolio Evaluation Services,  a
     division of Van Kampen Merritt Investment Advisory Corp., has caused
     this  Trust Indenture and Agreement to be executed by its  President
     or  one  of its Vice Presidents and its corporate seal to be  hereto
     affixed and attested to by its Secretary, its Assistant Secretary or
     one  of its Assistant Vice Presidents and The Bank of New York,  has
     caused  this  Trust  Agreement to be executed by  one  of  its  Vice
     Presidents and its corporate seal to be hereto affixed and  attested
     to  by  one  of  its Vice Presidents, Assistant Vice  Presidents  or
     Assistant Treasurers; all as of the day, month and year first  above
     written.

                                    Van Kampen Merritt Inc.
                                    
                                    
                                    By Sandra A. Waterworth
                                        Vice President
(Seal)
Attest:
By Gina M. Scumaci
    Assistant Secretary

                                    American Portfolio Evaluation
                                       Services, a division of Van Kampen
                                       Merritt Investment Advisory Corp.
                                    
                                    
                                    By Dennis J. Mcdonnell
                                        President
(Seal)
Attest:
By Scott E. Martin
    Secretary

                                    The Bank Of New York
                                    
                                    By Jeffrey Bieselin
                                        Vice President
(Seal)
Attest:
By Norbert Loney
    Assistant Treasurer

                      Schedules To Trust Agreement
                     Securities Initially Deposited
                                   In
       Insured Municipals Income Trust, 155th Insured Multi-Series

(Note:  Incorporated herein and made a part hereof as indicated below are
        the corresponding "Portfolios" of each of the Trusts as set forth
        in the Prospectus.)


                                                             Exhibit 1.5

                           Dated:  June 1, 1992

                                   --
                                                                      
                   Master Agreement Among Underwriters
                 For Unit Investment Trusts Sponsored by
                         Van Kampen Merritt Inc.
                                    

Van Kampen Merritt Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois 60181

Gentlemen:

      1.    The  Trust.  We understand that you, Van Kampen Merritt  Inc.
(the  "Sponsor"), are entering into this agreement (the  "Agreement")  in
counterparts with us and other firms who may be underwriters  for  issues
of  various  series of unit investment trusts for which you will  act  as
Sponsor.  This Agreement shall apply to any offering after May 1, 1992 of
units  of  fractional  undivided interest in  such  various  series  unit
investment   trusts  in  which  we  elect  to  act  as   an   underwriter
(underwriters  with  respect to each such trust being hereinafter  called
"Underwriters") after receipt of a notice from you stating the  name  and
size  of  the trust and that our participation as an Underwriter  in  the
proposed  offering shall be subject to the provisions of this  Agreement.
The issuer of the units of fractional undivided interests in a series  of
a unit investment trust offered in any offering of units made pursuant to
this  Agreement  is  hereinafter referred  to  as  the  "Trust"  and  the
reference  to "Trust" in this Agreement applies only to such  Trust,  and
such  units  of  such Trust offered are hereinafter called  the  "Units".
Each  Trust  is or will be registered as a "unit investment trust"  under
the  Investment  Company  Act  of 1940 (the "1940  Act")  by  appropriate
filings  with  the Securities and Exchange Commission (the "Commission").
Additionally,  each  Trust is or will be registered with  the  Commission
under  the  Securities Act of 1933 (the "1933 Act") on Form  S-6  or  its
successor   forms,   including  a  proposed  form  of   prospectus   (the
"Preliminary Prospectus").
     
     The  registration statement as finally amended and  revised  at  the
time  it  becomes  effective is herein referred to as  the  "Registration
Statement"  and  the  related prospectus is herein  referred  to  as  the
"Prospectus",  except that if the prospectus filed by the Trust  pursuant
to  Rule  424(b) under the 1933 Act shall differ from the  prospectus  on
file  at the time the Registration Statement shall become effective,  the
term  "Prospectus" shall refer to the prospectus filed pursuant  to  Rule
424(b) from and after the date on which it shall have been filed.
     
     The following provisions of this Agreement shall apply separately to
each individual offering of Units by a Trust.
     
     We  understand  that as of the date upon which  we  have  agreed  to
underwrite  Units of the Trust the Commission shall not have  issued  any
order  preventing  or  restraining the use of any Preliminary  Prospectus
and,  further,  that  each Preliminary Prospectus shall  conform  in  all
material  respects to the requirements of the 1933 Act and the Rules  and
Regulations thereunder and, as of its date, shall not include any  untrue
statement  of a material fact or omit to state a material fact  necessary
to  make the statements therein not misleading; and when the Registration
Statement becomes effective, it and the Prospectus, and any amendments or
supplements thereto, will contain all statements that are requirnder the
1933 Act shall differ from the  prospectus  on file  at the time the
Registration Statement shall become effective,  the term  "Prospectus"
shall refer to the prospectus filed pursuant  to  Rule 424(b) from and
after the date on which it shall have been filed.
     
     The following provisions of this Agreement shall apply separately to
each individual offering of Units by a Trust.
     
     We  understand  that as of the date upon which  we  have  agreed  to
underwrite  Units of the Trust the Commission shall not have  issued  any
order  preventing  or  restraining the use of any Preliminary  Prospectus
and,  further,  that  each Preliminary Prospectus shall  conform  in  all
material  respects to the requirements of the 1933 Act and the Rules  and
Regulations thereunder and, as of its date, shall not include any  untrue
statement  of a material fact or omit to state a material fact  necessary
to  make the statements therein not misleading; and when the Registration
Statement becomes effective, it and the Prospectus, and any amendments or
supplements thereto, will contain all statements that are required to  be
stated  therein  in  accordance with the  1933  Act  and  the  Rules  and
Regulations thereunder and will in all material respects conform  to  the
requirements  of  the 1933 Act and the Rules and Regulations  thereunder,
and  neither  the  Registration Statement nor  the  Prospectus,  nor  any
amendment or supplement thereto, will contain any untrue statement  of  a
material  fact  or omit to state a material fact required  to  be  stated
therein  or  necessary  to  make the statements therein  not  misleading;
provided,  however, that you make no representation  or  warranty  as  to
information contained in or omitted from any Preliminary Prospectus,  the
Registration   Statement,  the  Prospectus  or  any  such  amendment   or
supplement,  in reliance upon and in conformity with, written information
furnished to you by or on behalf of any Underwriter specifically for  use
in the preparation thereof.

      2.    Designation and Authority of Representative.  You are  hereby
authorized  to  act  as  our  representative  (the  "Representative")  in
connection with all matters to which this Agreement relates and  to  take
the  action provided herein to be taken by you as you may otherwise  deem
necessary or advisable.  We understand that we have no obligations  under
this  Agreement  with  respect to any Trust in which  we  choose  not  to
participate as an Underwriter.
     
     You  will be under no liability to us for any act or omission except
for  obligations  expressly assumed by you herein and no  obligations  on
your  part  will  be  implied  or  inferred  herefrom.   The  rights  and
liabilities of the respective parties hereto are several and  not  joint,
and  nothing  herein  or hereunder will constitute  then  a  partnership,
association or separate entity.

      3.   Profit or Loss in Acquisition of Securities.  It is understood
that the acquisition of securities (the "Securities") for deposit in  the
portfolio  of  the Trust shall be at your cost and risk.  We  acknowledge
that you will share with us any net deposit profits in the amounts and to
the   extent,   if   any,  indicated  under  "Sponsor   and   Underwriter
Compensation"  in  the Prospectus.  For the purposes of  determining  the
number of Units underwritten, we understand that we will be credited  for
that  number of Units set forth opposite our name in the section entitled
"Underwriting" in the prospectus.
     
     We  agree  that  you  shall have no liability (as Representative  or
otherwise)   with   respect  to  the  issue  form,  validity,   legality,
enforceability,  value  of, or title to the Securities,  except  for  the
exercise  of  due care in determining the genuineness of such  Securities
and  the  conformance  thereof with the descriptions  and  qualifications
appearing in the Prospectus.

      4.   Purchase of Units.  Promptly after you make a determination to
offer  Units  of  a  Trust and you inquire as to  whether  we  desire  to
participate  in  such offering, we will advise you  promptly  as  to  the
number  of  Units  which  we will purchase or  of  our  decision  not  to
participate in such offering.  Such advice may be written or  oral.   The
delivery to the Sponsor of a completed Schedule A to this Agreement shall
constitute  adequate written advice.  Oral advice shall  be  binding  but
shall  be  promptly  confirmed in writing by us by  means  of  telegraph,
telegram  or other form of wire or facsimile transmission.  Such  written
confirmation  shall contain the information requested by  Schedule  A  to
this  Agreement.  You may rely on and we hereby commit on the  terms  and
conditions of this Agreement to purchase and pay for the number of  Units
of  the Trust set forth in such advice (the "Unit Commitment").  Our Unit
Commitment may be increased only by mutual agreement between us  and  you
at  any  time prior to the date as of which the Trust Agreement  for  the
Trust  is  executed (the "Date of Deposit").  We agree that you  in  your
sole discretion reserve the right to decrease our Unit Commitment at  any
time  prior  to the Date of Deposit and if you so elect to  make  such  a
decrease,  you  will  notify  us of such an  election  by  telephone  and
promptly confirm the same in writing.
     
     The  price  to  be paid for such Units shall be the Public  Offering
Price per Unit (as defined in the Prospectus) as first determined on  the
Date  of  Deposit or such later determination on such Date of Deposit  as
you  shall advise us, less the sum per Unit indicated under "Sponsor  and
Underwriter  Compensation" in the Prospectus.  Further, each  Underwriter
who  underwrites  that  number  of Units  indicated  under  "Sponsor  and
Underwriter Compensation" in the Prospectus will receive from the Sponsor
that  additional  compensation  indicated  under  such  section  of   the
Prospectus for each Unit it underwrites, providing the Trust size  is  in
excess  of that number of Units, if any, indicated under such section  of
the  Prospectus.  At the Date of Deposit, we will become the owner of the
Units  and  be  entitled to the benefits (except for  interest,  if  any,
accruing from the Date of Deposit to the First Settlement Date)  as  well
as  the  risks inherent therein.  We acknowledge that those  persons,  if
any, named in the Prospectus under "Sponsor and Underwriter Compensation"
are  Managing  or  Co-Managing Underwriters of the  Trust,  as  indicated
therein, and we acknowledge that those persons specifically named therein
will receive as additional compensation those respective per Unit amounts
set forth in such section of the Prospectus.
     
     You  are  authorized  to  retain custody  of  our  Units  until  the
Registration  Statement relating thereto has become effective  under  the
1933 Act and you shall have received payment from us for such Units.
     
     You  are  authorized  to  file  an amendment  to  said  Registration
Statement  describing  the  Securities and furnishing  information  based
thereon or relating thereto and any further amendments or supplements  to
the Registration Statement or Prospectus which you may deem necessary  or
advisable.  We will furnish to you upon your request such information  as
will be required to insure that the Registration Statement and Prospectus
are  current  insofar as they relate to us and we thereafter continue  to
furnish you with such information as may be necessary to keep current and
correct the information previously supplied.
     
     We  understand that the Trust will also take action with respect  to
the  offering  and  sale of Units in accordance  with  the  Blue  Sky  or
securities laws of certain states in which it is proposed that the  Units
may be offered and sold.

      5.    Public Offering.  You agree that you will advise us  promptly
when  the Registration Statement has become effective, and we agree  that
when  we are advised that the Units are released for public offering,  we
will make a public offering thereof by means of the Prospectus under  the
1933  Act,  as  amended, which describes the deposit  of  Securities  and
related  information.   The  Public Offering  Price  and  the  terms  and
conditions of the public offering shall be as set forth in the Prospectus
and  shall rely with respect to the offering price of the Securities upon
the  determination  of  the Evaluator named in  the  Prospectus.   Public
advertisement of the offering, if any, shall be made by you on behalf  of
the  Underwriters  on such date as you shall determine.   We  agree  that
before  we  use any Trust advertising material which we have created,  we
will obtain your prior approval to use such advertising materials.

      6.    Public  Offering Price.  We agree that each  day  while  this
Agreement  is in effect and the evaluation of the Trust is  made  by  the
Evaluator  named  in  the  Prospectus,  we  will  contact  you  for  such
evaluation and of the resultant Public Offering Price for the purpose  of
the offering and sale of the respective Units to the public.  We agree as
required by Section 22(d) of the 1940 Act to offer and sell our Units  at
the current Public Offering Price described in the Prospectus.

      7.    Permitted Transactions.  It is agreed that part or all of the
Units purchased by us may be sold to dealers, or other entities with whom
we  can legally grant a concession or agency commission, only at the then
effective  Public  Offering Price, less the concession described  in  the
Prospectus.
     
     From  time  to  time prior to the termination of this Agreement,  at
your  Request, we will advise you of the number of our Units which remain
unsold  and,  at  your request, we agree to deliver to you  any  of  such
unsold  Units to be sold for our account to retail accounts or, less  the
concession or agency commission then effective, to dealers or others.
     
     If  prior to the termination of this Agreement, or such earlier date
as you may determine and advise us thereof in writing, you shall purchase
or  contract to purchase any of our Units or any Units issued in exchange
therefor, in the open market or otherwise, or if any such Units shall  be
tendered to the Trustee for redemption because not effectively placed for
investment by us, we agree to repurchase such Units at a price  equal  to
the   total  cost  of  such  purchase,  including  accrued  interest  and
commissions, if any, and transfer taxes on redelivery.  Regardless of the
amount  paid on the repurchase of any such Units, it is agreed that  they
may be resold by us only at the then effective Public Offering Price.
     
     Until the termination of this Agreement, we agree that we will  make
no  purchase  of  Units  other than (i) purchases provided  for  in  this
Agreement, (ii) purchases approved by you and (iii) purchases  as  broker
in executing unsolicited orders.

      8.   Compliance With Commission Order.  We hereby agree as follows:
(a)  we will refund all sales charges to purchasers of Units from  us  or
any  dealer participating in the distribution of Units who purchased such
Units  from us if, within ninety days from the time that the Registration
Statement  of the respective Units under the 1933 Act shall  have  become
effective, (i) the net worth of the trust shall be reduced to  less  than
20% of the principal amount of Securities originally deposited therein or
(ii)  the  Trust  shall have been terminated; (b) you  may  instruct  the
Trustee on the Date of Deposit that, in the event that redemption by  any
Underwriters of Units constituting part of any unsold allotment of  Units
shall  result  in the Trust having a net worth of less than  40%  of  the
principal amount of Securities originally deposited therein, the  Trustee
shall  terminate the Trust in the manner provided in the Trust  Indenture
and   Agreement  (as  defined  in  the  Prospectus)  and  distribute  the
Securities  and other assets of the Trust pursuant to the  provisions  of
the  Trust  Indenture and Agreement; and (c) in the event that the  Trust
shall  have  been  terminated pursuant to (b) above, we will  refund  any
sales  charges to any purchaser of such Units who purchased from  us,  or
purchased  from a dealer participating in the distribution of such  Units
who purchased such Units from us.  We authorize you to charge our account
for all refunds of sales charges in respect to our Units.

      9.   Substitution of Underwriters.  We authorize you to arrange for
the  substitution hereunder of other persons, who may include you and us,
for  all  or  any part of the commitment of any nondefaulting Underwriter
with  the  consent of such Underwriter, and of any defaulting Underwriter
without  the consent thereof, upon such terms and conditions as  you  may
deem  advisable, provided that the number of Units to be purchased by  us
shall  not  be  increased without our consent and that such  substitution
shall  not  in any way affect the liability of any defaulting Underwriter
to  the other Underwriters for damages from such default, nor relieve any
other  Underwriter of any obligation under this Agreement.  The  expenses
chargeable to the account of any defaulting Underwriter and not paid  for
by  it or by a person substituted for such Underwriter and any additional
losses  or expenses arising from such default shall be considered  to  be
expenses  under this Agreement and shall be charged against the  accounts
of  the  nondefaulting  Underwriters in proportion  to  their  respective
commitments.

     10.    Termination.  This Agreement shall terminate with respect  to
each  Trust which we have agreed to underwrite 30 days after the date  on
which  the  public  offering  of the Units  of  such  Trust  is  made  in
accordance  with  Section  5  hereof unless  sooner  terminated  by  you,
provided  that  you may extend this Agreement for not  more  than  eleven
successive  periods of 30 days each upon notice to us  and  each  of  the
other Underwriters.
     
     Notwithstanding any settlement on the termination of this Agreement,
we  agree to pay our share of any amount payable on account of any claim,
demand  or  liability which may be asserted against the Underwriters,  or
any  of  them,  based  on the claim that the Underwriters  constitute  an
association,  unincorporated business or other separate  entity  and  our
share  of  any  expenses incurred by you in defending  against  any  such
claim,  demand or liability.  We also agree to pay any stamp taxes  which
may  be  assessed and paid after such settlement on account of any  Units
received or sold hereunder for our account.
     
     Notwithstanding any termination of this Agreement, no sales  of  the
Units  shall  be  made  by us at any time except in conformity  with  the
provisions of Section 22(d) of the 1940 Act.

     11.   Default by Other Underwriters.  Default by any one or more  of
the other Underwriters in respect of their several obligations under this
Agreement  shall  neither release you nor us from any of  our  respective
obligations hereunder.

     12.    Notices.  Notices hereunder shall by deemed to have been duly
given  if mailed or telegraphed to us at our address set forth below,  in
the  case  of notices to us, or to you at your address set forth  at  the
head of this Agreement, in the case of notices to you.

    13.   Net Capital.  You represent that you, and we represent that we,
are   in  compliance  with  the  capital  requirements  of  Rule  15c-3-1
promulgated  by the Commission under the Securities and Exchange  Act  of
1934,  and we may, in accordance with and pursuant to such Rule  15c-3-1,
agree  to  purchase the amount of Units to be purchased by  you  and  us,
respectively, under the Agreement.

     14.    Miscellaneous.   We confirm that we  are  a  member  in  good
standing of the National Association of Securities Dealers, Inc.
     
     We  confirm  that  we  will take reasonable  steps  to  provide  the
Preliminary  Prospectus or final Prospectus to any person making  written
request  therefor  to us and to make the Preliminary  Prospectus  or  the
final Prospectus available to each person associated with us expected  to
solicit   customers'  orders  for  the  Units  prior  to  the   effective
registration date and the final Prospectus if he is expected to offer the
Units  after the effective date.  We understand that you will  supply  us
upon  our  request with sufficient copies of such prospectuses to  comply
with the foregoing.
     
     This  Agreement  is  being executed by us and delivered  to  you  in
duplicate.  Upon your confirmation hereof and of agreements in  identical
form with each of the other Underwriters, this Agreement shall constitute
a valid and binding contract between us.
                                    
                                    Very truly yours,
                                    
                                    
                                    
                                    

Confirmed  as  of the date set forth at the head of this Agreement  

 Van Kampen Merritt, Inc.           Indicated below our firm
                                    name and address exactly as we 
  By____________________________    wish to appear in the Prospectus

 Title__________________________    ____________________________________

                                    ____________________________________

                                    ____________________________________


                                                    Exhibit 3.1

                                   --
                                    
                           Chapman and Cutler
                         111 West Monroe Street
                        Chicago, Illinois  60603
                                    
                                    
                                    
                                    
                            February 24, 1994
                                    
                                    
                                    
Van Kampen Merritt Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois  60181
     
     
     Re:Insured Municipals Income Trust, 155th Insured Multi-Series

Gentlemen:
     
     We  have  served as counsel for Van Kampen Merritt Inc., as  Sponsor
and  Depositor  of Insured Municipals Income Trust, 155th Insured  Multi-
Series  (hereinafter referred to as the "Fund"), in connection  with  the
preparation,  execution and delivery of a Trust Agreement dated  February
24,  1994  between  Van  Kampen  Merritt  Inc.,  as  Depositor,  American
Portfolio   Evaluation  Services,  a  division  of  Van  Kampen   Merritt
Investment  Advisory Corp., as Evaluator, and The Bank of  New  York,  as
Trustee,  pursuant to which the Depositor has delivered to and  deposited
Bonds listed in the Schedules to the Trust Agreement with the Trustee and
pursuant  to  which  the Trustee has issued to or on  the  order  of  the
Depositor  a certificate or certificates representing Units of fractional
undivided  interest in and ownership of the several Trusts of  said  Fund
(hereinafter  referred  to  as  the "Units")  created  under  said  Trust
Agreement.
     
     In connection therewith, we have examined such pertinent records and
documents  and  matters of law as we have deemed necessary  in  order  to
enable us to express the opinions hereinafter set forth.
     
     Based upon the foregoing, we are of the opinion that:
     
           1.   The execution and delivery of the Trust Agreement and the
     execution and issuance of certificates evidencing the Units  in  the
     several Trusts of the Fund have been duly authorized; and
     
           2.    The  certificates evidencing the Units  in  the  several
     Trusts of the Fund when duly executed and delivered by the Depositor
     and   the  Trustee  in  accordance  with  the  aforementioned  Trust
     Agreement,  will  constitute valid and binding obligations  of  such
     Trusts and the Depositor in accordance with the terms thereof.
     
     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement (File No. 33-51479) relating to the Units referred
to  above and to the use of our name and to the reference to our firm  in
said Registration Statement and in the related Prospectus.

                                    Respectfully submitted,
                                    
                                    
                                    Chapman and Cutler

MJK/ch

                                                    Exhibit 3.2

                                   --
                                    
                                    
                           Chapman and Cutler
                         111 West Monroe Street
                        Chicago, Illinois  60603
                                    
                                    
                                    
                                    
                            February 24, 1994
                                    
                                    
                                    
Van Kampen Merritt Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois  60181

The Bank of New York
101 Barclay Street
New York, New York 10286
     
     
     Re:Insured Municipals Income Trust, 155th Insured Multi-Series

Gentlemen:
     
     We  have acted as counsel for Van Kampen Merritt Inc., Depositor  of
Insured Municipals Income Trust, 155th Insured Multi-Series (the "Fund"),
in connection with the issuance of Units of fractional undivided interest
in the several Trusts of said Fund under a Trust Agreement dated February
24, 1994 (the "Indenture") between Van Kampen Merritt Inc., as Depositor,
American Portfolio Evaluation Services, a division of Van Kampen  Merritt
Investment  Advisory Corp., as Evaluator, and The Bank of  New  York,  as
Trustee.    In   this  connection,  we  have  examined  the  Registration
Statement,  the  form  of  Prospectus  proposed  to  be  filed  with  the
Securities  and  Exchange  Commission,  the  Indenture  and  such   other
instruments  and documents as we have deemed pertinent.  Based  upon  the
foregoing and upon an investigation of such matters of law as we consider
to  be  applicable,  we are of the opinion that, under  existing  Federal
income tax law:
     
          (i)   Each Trust is not an association taxable as a corporation
     but will be governed by the provisions of subchapter J (relating  to
     trusts) of chapter 1, Internal Revenue Code of 1986 (the "Code").
     
         (ii)    Each Unitholder will be considered as owning a pro  rata
     share  of each asset of the respective Trust in the proportion  that
     the  number  of Units of such Trust held by him bears to  the  total
     number  of  Units  outstanding  of such  Trust.   Under  subpart  E,
     subchapter J of chapter 1 of the Code, income of each Trust will  be
     treated as income of each Unitholder of the respective Trust in  the
     proportion described, and an item of Trust income will have the same
     character in the hands of a Unitholder as it would have in the hands
     of  the  Trustee.  Accordingly, to the extent that the income  of  a
     Trust  consists  of  interest excludable  from  gross  income  under
     Section 103 of the
     
     Code,  such income will be excludable from Federal gross  income  of
     the  Unitholders,  except  in the case of  a  Unitholder  who  is  a
     substantial  user (or a person related to such user) of  a  facility
     financed  through  issuance of any industrial development  bonds  or
     certain private activity bonds held by the respective Trust.  In the
     case  of  such  Unitholder  (and no other)  interest  received  with
     respect  to  his  Units attributable to such industrial  development
     bonds  or  such private activity bonds is includable  in  his  gross
     income.  In the case of certain corporations, interest on the  Bonds
     is  included  in computing the alternative minimum tax  pursuant  to
     Section  56(c)  of the Code, the environmental tax  (the  "Superfund
     Tax") imposed by Section 59A of the Code, and the branch profits tax
     imposed by Section 884 of the Code with respect to U.S. branches  of
     foreign corporations.
     
        (iii)    Gain  or  loss will be recognized to a  Unitholder  upon
     redemption  or sale of his Units.  Such gain or loss is measured  by
     comparing the proceeds of such redemption or sale with the  adjusted
     basis   of  the  Units  represented  by  his  Certificate.    Before
     adjustment, such basis would normally be cost if the Unitholder  had
     acquired  his Units by purchase, plus his aliquot share of  advances
     by the Trustee to the Trust to pay interest on Bonds delivered after
     the  Unitholder's settlement date to the extent that  such  interest
     accrued  on  the  Bonds  during  the period  from  the  Unitholder's
     settlement  date  to  the  date such  Bonds  are  delivered  to  the
     respective Trust, but only to the extent that such advances  are  to
     be repaid to the Trustee out of interest received by such Trust with
     respect to such Bonds.  In addition, such basis will be increased by
     the  Unitholder's  aliquot  share  of  the  accrued  original  issue
     discount with respect to each Bond held by the Fund with respect  to
     which there was an original issue discount at the time the Bond  was
     issued  and  reduced by the annual amortization of bond premium,  if
     any, on Bonds held by the Trust.
     
        (iv)   If the Trustee disposes of a Trust asset (whether by sale,
     payment  on  maturity,  redemption or otherwise)  gain  or  loss  is
     recognized  to the Unitholder and the amount thereof is measured  by
     comparing the Unitholder's aliquot share of the total proceeds  from
     the  transaction with his basis for his fractional interest  in  the
     asset  disposed  of.  Such basis is ascertained by apportioning  the
     tax  basis for his Units among each of the Trust assets (as  of  the
     date  on  which his Units were acquired) ratably according to  their
     values  as  of  the  valuation date nearest the  date  on  which  he
     purchased such Units.  A Unitholder's basis in his Units and of  his
     fractional  interest  in each Trust asset must  be  reduced  by  the
     amount  of  his aliquot share of interest received by the Trust,  if
     any,  on  Bonds delivered after the Unitholder's settlement date  to
     the extent that such interest accrued on the Bonds during the period
     from  the  Unitholder's settlement date to the date such  Bonds  are
     delivered  to  the Trust, must be reduced by the annual amortization
     of  bond  premium, if any, on Bonds held by the Trust  and  must  be
     increased  by  the Unitholder's share of the accrued original  issue
     discount  with respect to each Bond which, at the time the Bond  was
     issued, had original issue discount.
     
          (v)    In  the  case of any Bond held by the  Trust  where  the
     "stated  redemption  price at maturity" exceeds the  "issue  price",
     such  excess shall be original issue discount.  With respect to each
     Unitholder,  upon  the  purchase of  his  Units  subsequent  to  the
     original issuance of Bonds held by the Trust, Section 1272(a)(7)  of
     the Code provides for a reduction in the accrued "daily portion"  of
     such  original issue discount upon the purchase of a Bond subsequent
     to  the Bond's original issue, under certain circumstances.  In  the
     case  of  any  Bond  held  by the Trust the  interest  on  which  is
     excludable  from  gross income under Section 103 of  the  Code,  any
     original issue discount which accrues with respect thereto  will  be
     treated  as  interest which is excludable from  gross  income  under
     Section 103 of the Code.
     
         (vi)   We have examined the Municipal Bond Unit Investment Trust
     Insurance Policies, if any, issued to certain of the Trusts  on  the
     Date  of  Deposit by AMBAC Indemnity Corporation, Financial Guaranty
     Insurance  Corporation or a combination thereof.  Each such  policy,
     or  a  combination of such policies, insures all bonds held  by  the
     Trustee  for  that particular Trust (other than bonds  described  in
     paragraph  (vii)) against default in the prompt payment of principal
     and  interest.   In  our opinion, any amount paid  under  each  said
     policy, or a combination of said policies, which represents maturing
     interest  on  defaulted  obligations held by  the  Trustee  will  be
     excludable from Federal gross income if, and to the same extent  as,
     such  interest would have been so excludable if paid by the  issuer.
     Paragraph  (ii)  of  this  opinion  is  accordingly  applicable   to
     insurance proceeds representing maturing interest.
     
        (vii)    Certain bonds in the portfolios of certain of the Trusts
     have  been  insured by the issuers thereof against  default  in  the
     prompt  payment  of  principal  and interest.   Insurance  has  been
     obtained for such bonds, or, in the case of a commitment, the  bonds
     will  be  ultimately insured under the terms of  such  an  insurance
     policy,  which  are  designated  as  issuer  insured  bonds  on  the
     portfolio pages of the respective Trusts in the Prospectus  for  the
     Fund, by the issuer of such bonds.  Insurance obtained by the issuer
     is  effective so long as such bonds remain outstanding.  For each of
     these  bonds,  we  have  been advised that the  aggregate  principal
     amount of such bonds listed on the portfolio page for the respective
     Trust  was  acquired by the applicable Trust and  are  part  of  the
     series of such bonds listed on the portfolio page for the respective
     Trust in the aggregate principal amount listed on the portfolio page
     for  the respective Trust.  Based upon the assumption that the bonds
     acquired  by the applicable Trust are part of the series covered  by
     an  insurance  policy  or,  in the case of  a  commitment,  will  be
     ultimately  insured under the terms of such an insurance policy,  it
     is  our  opinion  that any amounts received by the applicable  Trust
     representing maturing interest on such bonds will be excludable from
     Federal  gross  income if, and to the same extent as, such  interest
     would have been so excludable if paid in normal course by the Issuer
     notwithstanding  the source of the payment is from policy  proceeds.
     Paragraph  (ii)  of this opinion is accordingly applicable  to  such
     payment.
     
     Sections  1288 and 1272 of the Code provide a complex set  of  rules
governing  the  accrual of original issue discount.  These rules  provide
that  original issue discount accrues either on the basis of  a  constant
compound interest rate or ratably over the term of the Bond, depending on
the  date the Bond was issued.  In addition, special rules apply  if  the
purchase price of a Bond exceeds the original issue price plus the amount
of   original  issue  discount  which  accrued  to  prior  owners.    The
application of these rules will also vary depending on the value  of  the
bond  on  the  date a Unitholder acquires his Units, and  the  price  the
Unitholder pays for his Units.
     
     Because  the  Trusts  do  not include any "private  activity"  bonds
within  the  meaning  of  Section 141 of the  Code  issued  on  or  after
August 8, 1986, none of the Trust Fund's interest income shall be treated
as  an item of tax preference when computing the alternative minimum tax.
In   the  case  of  corporations,  for  taxable  years  beginning   after
December  31,  1986, the alternative minimum tax and  the  Superfund  Tax
depend upon the corporation's taxable income with certain adjustments.
     
     Pursuant  to Section 56(c) of the Code, one of the adjustment  items
used in computing AMTI and the Superfund Tax of a corporation (other than
an  S  Corporation, Regulated Investment Company, Real Estate  Investment
Trust  or  REMIC) for taxable years beginning after 1989,  is  an  amount
equal  to  75%  of  the  excess of such corporation's  "adjusted  current
earnings"  over an amount equal to its AMTI (before such adjustment  item
and the alternative tax net operating loss deduction).  "Adjusted current
earnings"  includes all tax-exempt interest, including  interest  on  all
Bonds in the Trust, and tax-exempt original issue discount.
     
     Effective  for  tax  returns  filed after  December  31,  1987,  all
taxpayers  are required to disclose to the Internal Revenue  Service  the
amount of tax-exempt interest earned during the year.
     
     Section  265  of the Code provides for a reduction in  each  taxable
year  of 100 percent of the otherwise deductible interest on indebtedness
incurred  or  continued  by  financial  institutions,  to  which   either
Section  585  or  Section 593 of the Code applies, to purchase  or  carry
obligations  acquired  after August 7, 1986, the  interest  on  which  is
exempt  from  Federal income taxes for such taxable  year.   Under  rules
prescribed by Section 265, the amount of interest otherwise deductible by
such  financial institutions in any taxable year which is  deemed  to  be
attributable  to  tax-exempt obligations acquired after August  7,  1986,
will  be  the amount that bears the same ratio to the interest  deduction
otherwise  allowable (determined without regard to Section  265)  to  the
taxpayer  for  the taxable year as the taxpayer's average adjusted  basis
(within  the meaning of Section 1016) of tax-exempt obligations  acquired
after August 7, 1986, bears to such average adjusted basis for all assets
of   the  taxpayer,  unless  such  financial  institution  can  otherwise
establish,  under regulations, to be prescribed by the Secretary  of  the
Treasury, the amount of interest on indebtedness incurred or continued to
purchase or carry such obligations.
     
     We  also call attention to the fact that, under Section 265  of  the
Code, interest on indebtedness incurred or continued to purchase or carry
Units  is  not deductible for Federal income tax purposes.   Under  rules
used  by the Internal Revenue Service for determining when borrowed funds
are  considered used for the purpose of purchasing or carrying particular
assets,  the purchase of Units may be considered to have been  made  with
borrowed  funds even though the borrowed funds are not directly traceable
to the purchase of Units.  However, these rules generally do not apply to
interest  paid  on indebtedness incurred for expenditures of  a  personal
nature  such  as  a mortgage incurred to purchase or improve  a  personal
residence.
     
     "The  Revenue  Reconciliation Act of 1993" (the "Tax Act")  subjects
tax-exempt  bonds to the market discount rules of the code effective  for
bonds purchased after April 30, 1993.  In general, market discount is the
amount  (if any) by which the stated redemption price at maturity exceeds
an  investor's purchase price (except to the extent that such difference,
if  any,  is  attributable to original issue discount not  yet  accrued).
Market  discount can arise based on the price a Trust pays for  Bonds  or
the  price  a Unitholder pays for his or her Units.  Under the  Tax  Act,
accretion  of market discount is taxable as ordinary income; under  prior
law,  the  accretion had been treated as capital gain.   Market  discount
that  accretes while a Trust holds a Bond would be recognized as ordinary
income  by  the Unitholders when principal payments are received  on  the
Bond,  upon sale or at redemption (including early redemption),  or  upon
the sale of redemption of his or her Units, unless a Unitholder elects to
include market discount in taxable income as it accrues.
     
     We  have  also  examined certain laws of the State  of  Florida,  to
determine their applicability to the Florida IM-IT Intermediate  Laddered
Maturity  Series 6 Trust (the "Florida Trust") being created as  part  of
the  Fund  and  to  the  holders of Units in the Florida  Trust  who  are
residents  of the State of Florida.  "Non-Corporate Unitholder"  means  a
Unitholder of the Florida Trust who is an individual not subject  to  the
Florida  state  income  tax on corporations under  Chapter  220,  Florida
Statutes  and  "Corporate Unitholder" means a Unitholder of  the  Florida
Trust  that is a corporation, bank or savings association subject to  the
Florida  state  income tax on corporations or franchise  tax  imposed  on
banks or savings associations under Chapter 220, Florida Statutes.
     
     Although  we  express no opinion with respect thereto, in  rendering
the opinion expressed herein, we have assumed that the Bonds were validly
issued   by   the   State   of  Florida  or  its   instrumentalities   or
municipalities.  Based on the foregoing, it is our opinion that:
     
          (a)    Neither the Florida Trust nor Non-Corporate  Unitholders
     will  be  subject to the Florida income tax imposed by Chapter  220,
     Florida Statutes.  Therefore, any amounts paid to the Florida  Trust
     or Non-Corporate Unitholders under an insurance policy issued to the
     Florida  Trust,  the  Issuers,  the Underwriters,  or  the  Sponsors
     thereof,  or others, which represent maturing interest on  defaulted
     obligations  held by the Trustee will not be subject to the  Florida
     income tax imposed by Chapter 220, Florida Statutes.
     
         (b)   Corporate Unitholders will be subject to Florida income or
     franchise  taxation  under  Chapter 220,  Florida  Statutes  (1)  on
     interest received by the Trust, (2) on payments of interest pursuant
     to  any insurance policy, (3) on gain realized when Bonds are  sold,
     redeemed or paid at maturity or when insurance payments with respect
     to  principal are received by the Trust and (4) on gain on the  sale
     or  redemption  of  Units,  to the extent allocable  to  Florida  as
     "adjusted  federal  income."   Corporate  Unitholders  that  have  a
     commercial  domicile  in Florida will also  be  subject  to  Florida
     income  or franchise taxation on 100 percent of the items of  income
     described  in  clauses (1) through (4) of the immediately  preceding
     sentence  to  the  extent that such income constitutes  "nonbusiness
     income."
     
          (c)   Even if interest on indebtedness incurred or continued by
     a  Unitholder  to purchase Units in the Trust is not deductible  for
     Federal income tax purposes, it will reduce interest income  on  the
     Bonds  which  is  reportable by Corporate  Unitholders  for  Florida
     income tax purposes.
     
          (d)   Trust Units held by a Florida resident will be includible
     in  the  resident's estate for Florida estate tax purposes,  but  if
     such  estate  is not subject to the Federal estate tax,  the  estate
     will  not be subject to the Florida estate tax.  The Florida  estate
     tax  is  limited to the amount of the credit for state  death  taxes
     provided for in section 2011 of the Code, less estate taxes paid  to
     states other than Florida.
     
          (e)    Neither the Bonds nor the Units will be subject  to  the
     Florida ad valorem tax, the Florida intangible personal property tax
     or Florida sales or use tax.

                                    
                                    Very truly yours,
                                    
                                    
                                    
                                    Chapman and Cutler
MJK/ch


                                                   Exhibit 3.3


                             Tanner Propp & Farber
                                99 Park Avenue
                              New York, NY  10016
     
     
                               February 24, 1994
                                       
                                       
                                       
Insured Municipals Income Trust
  155th Insured Multi-Series
The Bank of New York,
  As Trustee
101 Barclay Street, 17 West
New York, New York 10286

Dear Sirs:
     
     We have acted as special counsel for the Insured Municipals Income Trust,
155th  Insured  Multi-Series  (the "Fund") consisting  of  Insured  Municipals
Income  Trust, Series 318, Insured Municipals Income Trust, Short Intermediate
Series  90,  Florida  Insured  Municipals Income Trust  Intermediate  Laddered
Maturity,  Series 6, and Pennsylvania Insured Municipals Income Trust,  Series
182,  (individually  the "Trust" and in the aggregate the  "Trusts")  for  the
purposes of determining the applicability of certain New York taxes under  the
circumstances hereinafter described.
     
     The  Fund  is  created pursuant to a Trust Agreement  (the  "Indenture"),
dated  as of today (the "Date of Deposit") among Van Kampen Merritt Inc.  (the
"Depositor"), American Portfolio Evaluation Services, a division of Van Kampen
Merritt  Investment Advisory Corp., as Evaluator, and The Bank of New York  as
Trustee (the "Trustee").  As described in the prospectus relating to the  Fund
dated today to be filed as an amendment to a registration statement previously
filed with the Securities and Exchange Commission (file number 33-51479) under
the Securities Act of 1933, as amended (the "Prospectus" and the "Registration
Statement"),  the objectives of the Fund are the generation of  income  exempt
from  Federal taxation and as regards each of the "State" Trusts  exempt  from
income  tax and personal property tax of the State denominated in the name  of
that  "State"  Trust, if any, to the extent indicated in the  Prospectus.   No
opinion is expressed herein with regard to the Federal or State tax aspects of
the bonds, the Fund, Trusts (other than New York),
units  of the Trusts (the "Units") other than New York, or any interest, gains
or losses in respect thereof.
     
     As  more  fully  set  forth in the Indenture and in the  Prospectus,  the
activities of the Trustee will include the following:
     
     On  the Date of Deposit, the Depositor will deposit with the Trustee with
respect  to each of the Trusts, the total principal amount of interest bearing
obligations  and/or  contracts  for  the purchase  thereof  together  with  an
irrevocable letter of credit in the amount required for the purchase price and
accrued  interest, if any, and an insurance policy purchased by the  Depositor
evidencing  the  insurance guaranteeing the timely payment  of  principal  and
interest of tile obligations comprising the corpus of such trusts oilier  than
those  obligations the timely payment of principal and interest of  which  are
guaranteed by an insurance policy purchased by the issuer thereof or  a  prior
owner, which may be the Depositor prior to the Date of Deposit, as more  fully
set forth in the Prospectus with respect to each Trust.
     
     We  understand with respect to the obligations described in the preceding
paragraph  that  all  insurance, whether purchased by the Depositor,  a  prior
owner  or the issuer, provides, or will provide, that the amount paid  by  the
insurer  in  respect of any bond may not exceed the amount  of  principal  and
interest due on the bond and such payment will in no event relieve the  issuer
from its continuing obligation to pay such defaulted principal and interest in
accordance with the terms of the obligation.
     
     The  Trustee will not participate in the selection of the obligations  to
be  deposited in the Fund, and, upon the receipt thereof, will deliver to  the
Depositor  a  registered certificate for the number of Units representing  the
entire capital of each of the Trusts as more fully set forth in the Prospectus
and  the  Registration  Statement.   The  Units,  which  are  represented   by
certificates ("Certificates"), will be offered to the public by the Prospectus
upon the effectiveness of the Registration Statement.
     
     The  duties of the Trustee, which are ministerial in nature, will consist
primarily of crediting the appropriate accounts with interest received by each
of  the Trusts and with the proceeds from the disposition of obligations  held
in  the Trusts and the distribution of such interest and proceeds to the  Unit
holders  of  that  Trust.   The  Trustee will also  maintain  records  of  the
registered holders of Certificates representing an interest in each Trust  and
administer the redemption of Units by such Certificate holders and may perform
certain  administrative  functions with respect  to  an  automatic  investment
option.
     
     Generally, obligations held in the Fund may be removed therefrom  by  the
Trustee  only upon redemption prior to their stated maturity, at the direction
of  the  Depositor in the event of an advance refunding or upon the occurrence
of  certain other specified events which adversely affect the sound investment
character of the Fund, such as default by the issuer in payment of interest or
principal  on  the  obligation and no provision for payment is  made  therefor
either  pursuant to insurance or otherwise and the Depositor fails to instruct
the  Trustee,  within  thirty  (30)  days after  notification,  to  hold  such
obligation.
     
     Prior  to the termination of the Fund, the Trustee is empowered  to  sell
Bonds,  from  a  list  furnished by the Evaluator, only  for  the  purpose  of
redeeming Units tendered to it and of paying expenses for which funds are  not
available.  The Trustee does not have the power to vary the investment of  any
Unit  holder in the Fund, and under no circumstances may the proceeds of  sale
of  any obligations held by the Fund be used to purchase new obligations to be
held therein.
     
     Article  9-A of the New York Tax Law imposes a franchise tax on  business
corporations,  and, for purposes of that Article, Section 208(l)  defines  the
term "corporation" to include, among other things, "any business conducted  by
a   trustee  or  trustees  wherein  interest  or  ownership  is  evidenced  by
certificate or other written instrument."
     
     The Regulations promulgated under Section 208 provide as follows:
          
          A  business  conducted by a trustee or trustees  in  which
          interest or ownership is evidenced by certificate or other
          written  instrument includes, but is not  limited  to,  an
          association commonly referred to as a "business trust"  or
          "Massachusetts trust".  In determining whether  a  trustee
          or  trustees  are conducting a business, the form  of  the
          agreement is of significance but is not controlling.   The
          actual  activities of the trustee or trustees,  not  their
          purposes and powers, will be regarded as decisive  factors
          in  determining whether a trust is subject  to  tax  under
          Article  9-A.   The  mere  investment  of  funds  and  the
          collection    of   income   therefrom,   with   incidental
          replacement of securities and reinvestment of funds,  does
          not constitute the conduct of a business in the case of  a
          business  conducted by a trustee or trustees. 20 NYCRR  1-
          2.3(b)(2) (July 11, 1990).
     
     New  York  cases  dealing with the question of whether a  trust  will  be
subject to the franchise tax have also delineated the general rule that  where
a  trustee  merely  invests  funds and collects  and  distributes  the  income
therefrom,  the  trust is not engaged in business and is not  subject  to  the
franchise  tax.   Burrell v. Lynch, 274 A.D. 347, 84 N.Y.S.2d 171  (3rd  Dept.
1948), order resettled, 274 A.D. 1083, 85 N.Y.S.2d 705 (3rd Dept. 1949).
     
     In  an opinion of the Attorney General of the State of New York, 47  N.Y.
Atty. Gen. Rep. 213 (Nov. 24, 1942), it was held that where the trustee of  an
unincorporated  investment  trust was without authority  to  reinvest  amounts
received  upon the sales of securities and could dispose of securities  making
up  the  trust  only  upon the happening of certain specified  events  or  the
existence  of certain specified conditions, the trust was not subject  to  the
franchise tax.
     
     In   the  instant  situation,  the  Trustee  is  not  empowered  to  sell
obligations  contained  in the corpus of the Fund and  reinvest  the  proceeds
therefrom.   Further,  the  power  to sell  such  obligations  is  limited  to
circumstances in which the creditworthiness or soundness of the obligation  is
in question or in which cash is needed to pay redeeming Unit holders or to pay
expenses, or where the Fund is liquidated pursuant to the termination  of  the
Indenture.   Only  in  circumstances in which  the  issuer  of  an  obligation
attempts  to  refinance it can the Trustee exchange an obligation  for  a  new
security.  In substance, the Trustee will merely collect and distribute income
and will not reinvest any income or proceeds, and the Trustee has no power  to
vary the investment of any Unit holder in the Fund.
     
     Under  Subpart  E  of Part 1, Subchapter J of Chapter I of  the  Internal
Revenue Code of 1986, as amended (the "Code"), the grantor of a trust will  be
deemed  to be the owner of the trust under certain circumstances and therefore
taxable  on  his  proportionate interest in the income  thereof.   Where  this
Federal  tax rule applies, the income attributed to the grantor will  also  be
income  to him for New York income tax purposes.  See TSB-M78(9)(c), New  York
Department of Taxation and Finance, June 23, 1978.
     
     By  letter,  dated  today, Messrs. Chapman and Cutler,  counsel  for  the
Depositor,  rendered their opinion that each Unit holder of a  Trust  will  be
considered  as  owning a share of each asset of that Trust in  the  proportion
that  the  number  of Units held by such holder bears to the total  number  of
Units  outstanding and the income of a Trust will be treated as the income  of
each  Unit  holder of that Trust in said proportion pursuant to Subpart  E  of
Part 1, Subchapter J of Chapter I of the Code.
     
     Based  on the foregoing and of the opinion of Messrs. Chapman and Cutler,
co-counsel for the Depositor, dated today, upon which we specifically rely, we
are  of  the  opinion that under existing laws, rulings, and  court  decisions
interpreting the laws of the State and City of New York:

      1.  Each of the Trusts will not constitute an association taxable as  a
corporation under New York law, and, accordingly, will not be subject  to  tax
on  its  income  under the New York State franchise tax or the New  York  City
general corporation tax.

      2.  The income of each of the Trusts will be treated as the income  of
the Unit holders under the income tax laws of the State and City of New York.

      3.  Unit holders who are not residents of New York State are not subject
to  the  personal income tax law thereof with respect to any interest or  gain
derived  from  a Trust or any gain from the sale or other disposition  of  the
Units,  except  to  the  extent that such interest or gain  is  from  property
employed in a business, trade, profession or occupation carried on in New York
state.
     
     In  addition, we are of the opinion that no New York State stock transfer
tax  will be payable in respect of any transfer of the Certificates by  reason
of the exemption contained in paragraph (a) of Subdivision 8 of Section 270 of
the New York Tax Law.
     
     We  hereby  consent to the filing of this opinion as an  exhibit  to  the
Registration  Statement relating to the Units and to the use of our  name  and
the reference to our firm in the Registration Statement and in the Prospectus.
                                    
                                    Very truly yours,
                                    
                                    
                                    Tanner Propp & Farber


MNS:ac


                                                        Exhibit 3.4

                       Saul, Ewing, Remick & Saul
                         3800 Centre Square West
                         Philadelphia, PA  19102
                                    
                                    
                            February 24, 1994
                                    
                                    
                                    
Insured Municipals Income Trust,
  155th Insured Multi-Series,
  Pennsylvania Insured Municipals
  Income Trust, Series 182
c/o Chapman & Cutler
111 W. Monroe Street
Chicago, IL  60603
     
     
   Re:  Insured Municipals Income Trust, 155th Insured Multi-Series,
        Pennsylvania Insured Municipals Income Trust, Series 182

Gentlemen:
     
     We  are  acting as special counsel with respect to Pennsylvania  tax
matters  for  the Insured Municipals Income Trust, 155th  Insured  Multi-
Series,  Pennsylvania Insured Municipals Income Trust,  Series  182  (the
"Fund")  in connection with the issuance of Units of fractional undivided
interests  in  the  Fund,  under a Trust Indenture  and  Agreement  dated
February  24,  1994  between Van Kampen Merritt, Inc. ("Van  Kampen")  as
Depositor,  American Portfolio Advisory Service, Inc., as Evaluator,  and
The  Bank of New York through its Wall Street Trust division, as Trustee.
It is our understanding that the Fund consists of a portfolio composed of
interest-bearing obligations issued by the Commonwealth  of  Pennsylvania
or  by  municipalities  and  other governmental  authorities  within  the
Commonwealth of Pennsylvania (the "Bonds").
     
     We have not examined any preliminary or final official statements of
issuers  of  the  Bonds,  nor have we examined  any  legal  opinions,  or
summaries of such opinions, relating to the validity of the Bonds in  the
Fund,  the  exemption of interest thereon from federal  income  tax,  the
exemption  of the Bonds from personal property taxes in Pennsylvania,  or
the  exemption of the interest on and any gain from the sale of the Bonds
from  the Pennsylvania personal income tax, given or to be given by  bond
counsel  to  the issuer at the time such Bonds are issued.   Further,  we
have  made no review of the proceedings relating to the issuance  of  the
Bonds or of the basis for such opinions.  Our opinion expressed below  is
based  in  part  on  the  assurance of Van Kampen that  the  Bonds  being
deposited  in  the  Fund  have been issued only by  the  Commonwealth  of
Pennsylvania  or by or on behalf of municipalities or other  governmental
agencies within the Commonwealth of Pennsylvania.
     
     We have examined certified copies, or copies otherwise identified to
our satisfaction, of such other documents as we have deemed necessary  or
appropriate  for  the purpose of rendering this opinion, including  those
related to previous transactions in which Van Kampen Merritt Inc. was the
Depositor  which  we  have been assured by Van Kampen  Merritt  Inc.  are
substantially the same as those relating to the Fund.
     
     Based upon the foregoing, we are of the opinion that:
     
          (1)    Units evidencing fractional undivided interests  in  the
     Fund,  to  the  extent  represented by  obligations  issued  by  the
     Commonwealth  of  Pennsylvania,  any public  authority,  commission,
     board  or  other agency created by the Commonwealth of Pennsylvania,
     any political subdivision of the Commonwealth of Pennsylvania or any
     public authority created by any such political subdivision, are  not
     taxable under any of the personal property taxes presently in effect
     in Pennsylvania;
     
         (2)   Distributions of interest income to Unitholders that would
     not  be taxable if received directly by a Pennsylvania resident  are
     not subject to personal income tax under the Pennsylvania Tax Reform
     Code  of  1971; nor will such interest be taxable under Philadelphia
     School  District  Investment  Income  Tax  imposed  on  Philadelphia
     resident individuals;
     
           (3)    A  Unitholder  may  have  a  taxable  event  under  the
     Pennsylvania state and local income tax referred to in the preceding
     paragraph upon the redemption or sale of his Units;
     
          (4)    Units are subject to Pennsylvania inheritance and estate
     taxes;
     
          (5)    A  Unitholder which is a corporation may have a  taxable
     event  under  the  Pennsylvania Corporate Net Income  Tax  upon  the
     redemption  or  sale of its Units.  Interest income  distributed  to
     Unitholders  which are corporations is not subject  to  Pennsylvania
     Corporate  Net  Income  Tax  or  Mutual  Thrift  Institutions   Tax.
     However, banks, title insurance companies and trust companies may be
     required to take the value of Units into account in determining  the
     taxable value of their shares subject to Shares Tax;
     
         (6)   Under Act No. 68 of December 3, 1993, gains derived by the
     Fund  from the sale, exchange or other disposition of Bonds  may  be
     subject  to Pennsylvania personal or corporate income taxes.   Those
     gains  which  are  distributed by the Fund to  Unitholders  who  are
     individual will be subject to Pennsylvania Personal Income Tax  and,
     for  residents  of  Philadelphia, to  Philadelphia  School  District
     Investment Income Tax.  For Unitholders which are corporations,  the
     distributed  gains will be subject to Corporate Net  Income  Tax  or
     Mutual Thrift Institutions Tax.  Gains which are not distributed  by
     the  Fund will nevertheless be taxable to Unitholders if derived  by
     the  Fund  from  the  sale, exchange or other disposition  of  Bonds
     issued  on  or  after  February  1,  1994.   Gains  which  are   not
     distributed  by  the Fund will remain nontaxable to  Unitholders  if
     derived by the Fund from the sale, exchange or other disposition  of
     Bonds issued prior to February 1, 1994.  However, for gains from the
     sale,  exchange or other disposition of these Bonds  to  be  taxable
     under  the Philadelphia School District Investment Income  Tax,  the
     Bonds must be held for six months or less;
     
          (7)   Any proceeds paid under insurance policies issued to  the
     Trustee or obtained by issuers or the underwriters of the Bonds, the
     Sponsor  or others which represent interest on defaulted obligations
     held  by  the  Trustee  will be excludable from  Pennsylvania  gross
     income if, and to the same extent as, such interest would have  been
     so  excludable  if paid in the normal course by the  issuer  of  the
     defaulted obligations; and
     
           (8)     The  Fund  is  not  taxable  as  a  corporation  under
     Pennsylvania tax laws applicable to corporations.
     
     On  December 3, 1993, change to Pennsylvania law affecting  taxation
of  income  and  gains from the sale of Commonwealth of Pennsylvania  and
local  obligations were enacted.  Among these changes was the  repeal  of
the  exemption  from  tax  of  gains realized  upon  the  sale  or  other
disposition of such obligations.  The Pennsylvania Department of  Revenue
has  not  issued  any  regulations  or other  guidance  concerning  these
changes.  The opinions expressed above are based on our analysis  of  the
law  but are subject to modification upon review of regulations or  other
guidance that may be issued by the Department of Revenue.
     
     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement (SEC No. 33-51479) relating to the Units  referred
to  above and to the use of our name and to the reference to our firm  in
the said Registration Statement and in the related Prospectus.

                                    Very truly yours,
                                    
                                    Saul, Ewing, Remick & Saul

                                                              Exhibit 4.1


Interactive Data
14 West Street
New York, NY  10005


February 23, 1994


Van Kampen Merritt, Inc.
One Parkview Plaza
Oakbrook Terrace, IL 60181
     
     
 Re: Insured Municipals Income Trust, 155th Insured Multi-Series
     (A Unit Investment Trust) Registered Under the Securities Act of
     1933
     File No. 33-51479
     

Gentlemen:
     
     We  have  examined the Registration Statement for the above  captioned
Fund, copy of which is attached hereto.
     
     We  hereby consent to the reference in the Prospectus and Registration
Statement for the above captioned Fund to Interactive Data Services,  Inc.,
as  the  Evaluator, and to the use of the Obligations prepared by us  which
are referred to in such Prospectus and Statement.
     
     You  are  authorized to file copies of this letter with the Securities
and Exchange Commission.
                                    
                                   Very truly yours,
                                    
                                    
                                   James Perry
                                   Vice President



                                               Exhibit 4.2

Standard & Poor's Corporation
25 Broadway
New York, New York  10004-1064


Mr. Mark Kneedy
Chapman and Cutler
111 West Monroe Street
Chicago, Illinois 60603
     
     
     Re:  Insured Municipals Income Trust, 155th Insured Multi-Series*

Dear Mr. Kneedy:
     
     Pursuant  to your request for a Standard & Poor's rating on the units  of
the  above-captioned  trust, SEC #33-51479, we have reviewed  the  information
presented to us and have assigned a 'AAA' rating to the units of the trust and
a  'AAA'  rating to the securities contained in the trust for as long as  they
remain in the trust.  The ratings are direct reflections, of the portfolio  of
the  trust,  which  will  be  composed solely of securities  covered  by  bond
insurance policies that insure against default in the payment of principal and
interest  on the securities so long as they remain in the trust.   Since  such
policies  have been issued by one or more insurance companies which have  been
assigned a 'AAA' claims paying ability rating by S&P, S&P has assigned a 'AAA'
rating to the units of the trust and to the securities contained in the  trust
for as long as they remain in the trust.
     
     You  have permission to use the name of Standard & Poor's Corporation and
the   above-assigned  ratings  in  connection  with  your   dissemination   of
information relating to these units, provided that it is understood  that  the
ratings are not "market" ratings nor recommendations to buy, hold, or sell the
units  of  the  trust or the securities contained in the trust.   Further,  it
should  be  understood the rating on the units does not take into account  the
extent  to  which  fund expenses or portfolio asset sales for  less  than  the
fund's  purchase price will reduce payment to the unit holders of the interest
and  principal required to be paid on the portfolio assets.  S&P reserves  the
right  to  advise its own clients, subscribers, and the public of the ratings.
S&P  relies on the sponsor and its counsel, accountants, and other experts for
the  accuracy and completeness of the information submitted in connection with
the  ratings.  S&P does not independently verify the truth or accuracy of  any
such information.
     
     This  letter evidences our consent to the use of the name of  Standard  &
Poor's Corporation in connection with the rating assigned to the units in  the
registration  statement  or prospectus relating to the  units  or  the  trust.
However,  this letter should not be construed as a consent by us,  within  the
meaning of Section 7 of the Securities Act of 1933, to the use of the name  of
Standard & Poor's Corporation in connection with the ratings assigned  to  the
securities contained in the trust.  You are hereby authorized to file  a  copy
of this letter with the Securities and Exchange Commission.
     
     Please  be  certain to send us three copies of your final  prospectus  as
soon  as it becomes available.  Should we not receive them within a reasonable
time  after the closing or should they not conform to the representations made
to us, we reserve the right to withdraw the rating.
     
     We  are pleased to have had the opportunity to be of service to you.   If
we can be of further help, please do not hesitate to call upon us.

                                    Sincerely,

                                    Vincent S. Orgo


*Consisting of:
     
     Insured Municipals Income Trust, Series 318
     Insured Municipals Income Trust, Short Intermediate Series 90
     Florida Insured Municipals Income Trust Intermediate Laddered Maturity,
       Series 6
     Pennsylvania Insured Municipals Income Trust, Series 182
     

                                    
                                    
                                                          Exhibit 4.3
                                    
                                    
            Independent Certified Public Accountants' Consent
     
     We have issued our report dated February 24, 1994 on the statements
of condition and related bond portfolios of Insured Municipals Income
Trust, 155th Insured Multi-Series (IM-IT, IM-IT Short Intermediate,
Florida IM-IT Intermediate Laddered Maturity, and Pennsylvania IM-IT
Trusts) as of February 24, 1994 contained in the Registration Statement
on Form S-6 and Prospectus.  We consent to the use of our report in the
Registration Statement and Prospectus and to the use of our name as it
appears under the caption "Other Matters-Report of Independent Certified
Public Accountants".


                                    Grant Thornton

Chicago, Illinois
February 24, 1994



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