INSURED MUNICIPALS INCOME TRUST & IN QU TAX EX TR MUL SE 306
497, 1998-10-06
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                                   VAN KAMPEN
                                PROSPECTUS PART I

             CALIFORNIA INSURED MUNICIPALS INCOME TRUST, SERIES 176

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

   California Insured Municipals Income Trust, Series 176 (the "Trust")
(included in Insured Municipals Income Trust and Investors' Quality Tax-Exempt
Trust, Multi-Series 306 (the "Fund")) consists of interest-bearing obligations
issued by or on behalf of municipalities and other governmental authorities, the
interest on which is, in the opinion of bond counsel to the issuer, exempt from
all Federal income taxes under existing law and exempt to the extent described
herein from California state and local taxes when held by residents of
California (the "Bonds"). The objective of the Trust is Federal and California
tax-exempt income and conservation of capital through an investment in a
diversified portfolio of tax-exempt bonds. The Units of the Trust are rated
"AAA" by Standard & Poor's. The Trust is referred to herein as the "State Trust"
or "Insured Trust."

   The Trust consists of 10 issues of Bonds. None of the Bonds are general
obligations of the governmental entities issuing them or are backed by the
taxing power thereof. All of the 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) as follows: General Purpose, 3 (27%); Water and Sewer, 2
(22%); Wholesale Electric, 1 (14%); Airport, 1 (13%); Transportation, 1 (12%);
Certificate of Participation, 1 (11%) and Health Care, 1 (1%) . The dollar
weighted average maturity of the Bonds is 27 years.

                                            Monthly                Semi-Annual
                                        -------------            ------------
Estimated Current Return:                     4.23%                    4.28%
Estimated Long Term Return:                   4.26%                    4.31%
CUSIP:                                     13033P-84-3              13033P-85-0

   Estimated Current Return shows the estimated cash to be received each year
from the Bonds (net of estimated annual expenses) divided by the Public Offering
Price (including the sales charge).

   Estimated Long-Term Return shows the estimated return over the estimated life
of the Trust. This is based on an average of the yields to maturity (or an
earlier call date) of the Bonds adjusted to reflect the sales charge and
estimated expenses. The average yield for the portfolio is derived by weighting
each Bond's yield by its value and the time remaining to the call or maturity
date, depending on how the Bond is priced. Unlike Estimated Current Return,
Estimated Long-Term Return accounts for maturities, discounts and premiums of
the Bonds.

   No return calculation can predict your actual return because returns vary
with purchase price, sales charges, the length of the time Units are held and
changes in portfolio composition, interest income and expenses. The estimated
returns are designed to show a comparison rather than a prediction of returns. A
yield calculation, which is more comparable to a calculation of an individual
bond, may be higher or lower than these estimated returns which are more
comparable to return calculations of other investment products.

                                 OCTOBER 5, 1998

     THIS PROSPECTUS PART I MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY PART
II. BOTH PARTS OF THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE.

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

                   SUMMARY OF ESSENTIAL FINANCIAL INFORMATION

Initial Date of Deposit:                                         October 5, 1998
Principal Amount of Bonds:                                       $     2,015,000
Principal Amount of Bonds per Unit (1):                          $        998.51
Number of Units:                                                           2,018
- --------------------------------------------------------------------------------
PUBLIC OFFERING PRICE
- --------------------------------------------------------------------------------
Aggregate Offering Price of Bonds                                    $ 1,919,130
Aggregate Offering Price of Bonds per Unit                           $    951.01
  Plus Sales Charge per Unit                                         $     48.99
Public Offering Price per Unit (2)                                   $  1,000.00
Redemption Price per Unit                                            $    943.71
- --------------------------------------------------------------------------------
ESTIMATED ANNUAL INCOME PER UNIT
- --------------------------------------------------------------------------------
                                                                        Semi-
                                                          Monthly      Annual
                                                        -----------  -----------
Estimated Interest Income                               $     44.43  $     44.43
  Less Estimated Expenses (4)                           $      2.13  $      1.63
  Less Estimated Insurance Expenses                     $        --  $        --
Estimated Net Interest Income                           $     42.30  $     42.80
- --------------------------------------------------------------------------------
ESTIMATED DISTRIBUTIONS
- --------------------------------------------------------------------------------
                                                                     Semi-
                                                Monthly             Annual
                                           -----------------   -----------------
Initial Distribution                       $         3.75 on   $        10.93 on
                                           November 25, 1998    January 25, 1999
Normal Distribution (3)                    $            3.52   $           21.40
Record Dates                                     10th day of      January 10 and
                                                  each month             July 10
Distribution Dates                               25th day of      January 25 and
                                                  each month             July 25
- --------------------------------------------------------------------------------
EXPENSES
- --------------------------------------------------------------------------------
                                                                        Semi-
                                                          Monthly      Annual
                                                        -----------  -----------
Sales Charge (% of Public Offering Price)                     4.90%        4.90%
Estimated Annual Expenses per Unit
  Trustee's Fee (5) (6)                                 $      0.91  $      0.51
  Evaluator's Supervisory Fee                           $      0.25  $      0.25
  Evaluator's Evaluation Fee (5)                        $      0.30  $      0.30
  Other Operating Expenses                              $      0.89  $      0.79
                                                        -----------  -----------
Total Annual Expenses per Unit                          $      2.35  $      1.85
                                                        ===========  ===========

(1) Because certain of the Bonds may from time to time under certain
    circumstances be sold or redeemed or will be called or mature in accordance
    with their terms (including the call or sale of zero coupon bonds at prices
    less than par value), there is no guarantee that the value of each Unit at
    Trust termination will be equal to the Principal Amount of Bonds per Unit.

(2) After the First Settlement Date (October 8, 1998), Unitholders will pay
    accrued interest from such date to the settlement date less distributions
    from the Interest Account after the First Settlement Date.

(3) This is based on estimated cash flows per Unit which will vary with changes
    in expenses, interest rates and maturity, call, exchange or sale of the
    Bonds. Estimated cash flows are set forth in the Information Supplement or
    are available upon request.

(4) Excludes insurance expenses.

(5) This fee is assessed per $1,000 principal amount of Bonds. Other fees are
    assessed per Unit.

(6) During the first year the Trustee will reduce its fee by approximately $.22
    per Unit (which is the estimated interest to be earned prior to the expected
    delivery dates for the "when, as and if issued" Bonds). Should the interest
    exceed this amount, the Trustee will reduce its fee up to its annual fee.
    After the first year, the Trustee's fee will be the amount indicated above.
    Estimated interest income will increase to $44.65. Estimated General
    Expenses will increase to $2.35 and $1.85 under the monthly and semi-annual
    distribution plans, respectively. Estimated Net Interest Income will remain
    as shown.

<TABLE>
<CAPTION>
PORTFOLIO
- ---------------------------------------------------------------------------------------------------------------------
                                                                                                        OFFERING
                                                                                                        PRICE TO
                                                                                                        CALIFORNIA
AGGREGATE        NAME OF ISSUER, TITLE, INTEREST RATE AND                              REDEMPTION       IM-IT
PRINCIPAL        MATURITY DATE OF BONDS(1)(2)                               RATING(3)  FEATURE(4)       TRUST (2)
- -------------    ---------------------------------------------------------  ---------  --------------   -------------
<S>              <C>                                                        <C>        <C>              <C>
$     250,000    Airport Commission, City and County of San Francisco,
                   California, San Francisco International Airport, Second
                   Series Revenue Bonds, Issue 20 Refunding Bonds (MBIA
                   Insured)                                                            2008 @ 101
                   #4.50% Due 05/01/2023##                                     AAA     2020 @ 100 S.F.  $   241,898
      250,000    San Francisco, California, Bay Area Rapid Transportation
                   District, Sales Tax Revenue Bonds (AMBAC Assurance Insured)         2008 @ 101
                   #4.75% Due 07/01/2023                                       AAA     2019 @ 100 S.F.      249,078
      300,000    Sonoma County, California, Water and Wastewater Financing
                   Authority, Revenue Bonds (FSA Insured)                              2008 @ 101
                   #4.75% Due 08/01/2023                                       AAA     2019 @ 100 S.F.      298,458
      200,000    West Sacramento, California, Redevelopment Agency (West
                   Sacramento Redevelopment Project) Tax Allocation Revenue
                   Bonds (MBIA Insured)
                   #4.75% Due 09/01/2023                                       AAA     2008 @ 102           198,972
      225,000    Monterey County, California, Natividad Medical Center
                   Improvement, Certificates of Participation Bonds, Series E
                   (MBIA Insured)                                                      2008 @ 100
                   #4.75% Due 08/01/2025                                       AAA     2024 @ 100 S.F.      223,420
      250,000    Fontana, California, Redevelopment Agency (Southwest
                   Industrial Park Project) Tax Allocation Revenue Refunding
                   Bonds (MBIA Insured)                                                2007 @ 102
                   #4.75% Due 09/01/2026                                       AAA     2023 @ 100 S.F.      248,190
       10,000    San Mateo County, California, Joint Powers Authority, Lease
                   Revenue Bonds (FSA Insured)
                   #0.00% Due 09/01/2026                                       AAA                            2,606
       95,000    Yorba Linda, California, Redevelopment Agency, Tax Allocation
                   Revenue Capital Appreciation Bonds (MBIA Insured)
                   #0.00% Due 09/01/2026                                       AAA                           24,757
      285,000    Fresno, California, Joint Powers Financing Authority, Lease
                   Revenue Bonds (AMBAC Assurance Insured)                             2008 @ 102
                   #4.75% Due 09/01/2028                                       AAA     2019 @ 100 S.F.      283,290
      150,000    East Bay, California, Municipal Utility District, Water System
                   Revenue Bonds (MBIA Insured)                                        2008 @ 101
                   #4.75% Due 06/01/2034                                       AAA     2029 @ 100 S.F.      148,461
- ---------------                                                                                         ------------
$   2,015,000                                                                                           $ 1,919,130
===============                                                                                         ============
</TABLE>

- --------------------------------------------------------------------------------
All of the Bonds are insured either by one of the Preinsured Bond Insurers as
indicated in the Bond name or by a Portfolio Insurer under a portfolio insurance
policy. See "Insurance on the Bonds in the Insured Trusts" in Prospectus Part
II.

For an explanation of the footnotes used on this page, see "Notes to Portfolio".

NOTES TO PORTFOLIO

(1) The Bonds 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. Contracts to
    acquire the Bonds were entered into during the period from October 1, 1998
    to October 2, 1998.

(2) Other information regarding the Bonds is as follows:

                        COST TO           PROFIT (LOSS)
                        SPONSOR            TO SPONSOR
                    ---------------      ---------------
                      $ 1,902,488            $ 16,642
- -----------

    The breakdown of the Preinsured Bond Insurers is as follows: AMBAC Assurance
    27%, MBIA 58% and FSA 15%.

    The Sponsor may have entered into contracts which hedge interest rate
    fluctuations on certain Bonds. The cost of any such contracts and the
    corresponding gain or loss is included in the Cost to Sponsor. Bonds marked
    by "##" following the maturity date have been purchased on a "when, as and
    if issued" or "delayed delivery" basis. Interest on these Bonds 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. "#" prior to the coupon rate indicates that the Bond
    was issued at an original issue discount. See "The Trusts--Risk Factors" in
    Prospectus Part II. The tax effect of Bonds issued at an original issue
    discount is described in "Federal Tax Status" in Prospectus Part II.

(3) All ratings are by Standard & Poor's unless otherwise indicated. "*"
    indicates that the rating of the Bond is by Moody's. "o" indicates that the
    rating is contingent upon receipt by the rating agency of a policy of
    insurance obtained by the issuer of the bonds. "N/R" indicates that the
    rating service did not provide a rating for that Bond. For a brief
    description of the ratings see "Description of Ratings" in the Information
    Supplement.

(4) This is the year in which each Bond is initially or currently callable and
    the call price for that year. Each Bond 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. 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. See "The Trusts--Risk Factors" in
    Prospectus Part II.

   CALIFORNIA RISK FACTORS. The financial condition of the State of California
is affected by various national, economic, social and environmental policies and
conditions. Additionally, limitations imposed by constitutional amendments,
legislative measures, or voter initiatives on the State and its local
governments concerning taxes, bond indebtedness and other matters may constrain
the revenue-generating capacity of the State and its local governments and,
therefore, the ability of the issuers of the Bonds to satisfy their obligations.
The State faces a structural imbalance in its budget with the largest programs
supported by the General Fund (education, health, welfare and corrections)
growing at rates higher than the growth rates for the principal revenue sources
of the General Fund.

   The economic vitality of the State and its various regions and, therefore,
the ability of the State and its local governments to satisfy the Bonds, are
affected by numerous factors, such as natural disasters, complications with
exports and industry deregulation. The California economy continues to show
weakness in manufacturing, particularly aerospace as well as in the telephone,
communications and public utility industries. California's population increase
has resulted in traffic congestion, school overcrowding and high housing costs
which have caused an increase demand for government services and which may
impede future economic growth.

   The State is a party to numerous lawsuits in which an adverse final decision
could materially affect the State's governmental operations and consequently its
ability to pay debt service on its obligations. On December 7, 1994, Orange
County, California, together with its pooled investment fund (the "Pooled Fund")
filed for protection under Chapter 9 of the federal Bankruptcy Code. Many
governmental entities kept moneys in the Pooled Fund.

   All outstanding general obligation bonds of the State are rated "A+" by
Standard and Poor's and "A1" by Moody's.

   Further information concerning California risk factors may be obtained upon
request to the Sponsor as described in "Additional Information" appearing in
Prospectus Part II.

   TAX STATUS. The Internal Revenue Service Restructuring and Reform Act of 1998
provides that for taxpayers other than corporations, net capital gain (which is
defined as net long-term capital gain over net short-term capital loss for the
taxable year) realized from property (with certain exclusions) is subject to a
maximum marginal stated tax rate of 20% (10% in the case of certain taxpayers in
the lowest tax bracket). Capital gain or loss is long-term if the holding period
for the asset is more than one year, and is short-term if the holding period for
the asset is one year or less. The date on which a Unit is acquired (i.e., the
"trade date") is excluded for purposes for determining the holding period of the
Unit. The legislation is generally effective retroactively for amounts properly
taken into account on or after January 1, 1998. Capital gains realized from
assets held for one year or less are taxed at the same rates as ordinary income.
For a discussion of the Federal tax status of income earned on California IM-IT
Trust Units, see "Federal Tax Status" in Prospectus Part II.

   We have examined the income tax laws of the State of California to determine
its applicability to the California IM-IT Trust and to the holders of Units in
the California IM-IT Trust who are full-time residents of the State of
California ("California Unitholders"). The assets of the California IM-IT Trust
will consist of bonds issued by the State of California or a local government of
California (the "California Bonds") or by the Commonwealth of Puerto Rico or its
authority (the "Possession Bonds") (collectively, the "Bonds"). For purposes of
the following opinions, it is assumed that each asset of the California IM-IT
Trust is debt, the interest on which is excluded from gross income for federal
income tax purposes.

   Neither the Sponsor nor its counsel have independently examined the Bonds to
be deposited in and held in the California IM-IT Trust. However, although
Chapman and Cutler expresses no opinion with respect to the issuance of the
Bonds, in rendering its opinion expressed herein, it has assumed that: (i) the
Bonds were validly issued; (ii) the interest thereon is excludable from gross
income for federal income tax purposes; and (iii) interest on the Bonds, if
received directly by a California Unitholder, would be exempt from the income
tax imposed by the State of California that is applicable to individuals, trusts
and estates (the "California Personal Income Tax"). This opinion does not
address the taxation of persons other than full time residents of California. We
have assumed that, at the respective times of issuance of the Bonds, opinions
that the Bonds were validly issued and that interest on the Bonds is excluded
from gross income for Federal income tax purposes were rendered by bond counsel
to the respective issuing authorities. In addition, we have assumed that, with
respect to the California Bonds, bond counsel to the issuing authorities
rendered opinions that the interest on the California Bonds is exempt from the
California Personal Income Tax and, with respect to the Possession Bonds, bond
counsel to the issuing authorities rendered opinions that the Possession Bonds
and the interest thereon is exempt from all state and local income taxation.
Neither the Sponsor nor its counsel has made any review for the California IM-IT
Trust of the proceedings relating to the issuance of the Bonds or of the basis
for the opinions rendered in connection therewith.

   Based upon the foregoing, and upon an investigation of such matters of law as
we considered to be applicable, we are of the opinion that, under existing
provisions of the law of the State of California as of the date hereof:

   1.    The California IM-IT Trust is not an association taxable as a
         corporation for purposes of the California Bank and Corporation Tax
         Law, and each California Unitholder will be treated as the owner of a
         pro rata portion of the California IM-IT Trust, and the income of such
         portion of the California IM-IT Trust will be treated as the income of
         the California Unitholders under the California Personal Income Tax.

   2.    Interest on the Bonds which is exempt from tax under the California
         Personal Income Tax when received by the California IM-IT Trust and
         which would be excludable from California taxable income for purposes
         of the California Personal Income Tax if received directly by a
         California Unitholder, will be excludable from California taxable
         income for purposes of the California Personal Income Tax when received
         by the California IM-IT Trust and distributed to a California
         Unitholder.

   3.    Each California Unitholder of the California IM-IT Trust will generally
         recognize gain or loss for California Personal Income Tax purposes if
         the Trustee disposes of a Bond (whether by redemption, sale or
         otherwise) or when the California Unitholder redeems or sells Units of
         the California IM-IT Trust, to the extent that such a transaction
         results in a recognized gain or loss to such California Unitholder for
         federal income tax purposes.  However, there are certain differences
         between the recognition of gain or loss for federal income tax purposes
         and for California Personal Income Tax purposes, and California
         Unitholders are advised to consult their own tax advisors.  Tax basis
         reduction requirements relating to amortization of bond premium may,
         under some circumstances, result in a California Unitholder realizing
         taxable gain for California Personal Income Tax purposes when a Unit is
         sold or redeemed for an amount equal to or less than its original cost.

   4.    Under the California Personal Income Tax, interest on indebtedness
         incurred or continued by a California Unitholder to purchase Units in
         the California IM-IT Trust is not deductible for purposes of the
         California Personal Income Tax.

   This opinion relates only to California Unitholders subject to the California
Personal Income Tax. No opinion is expressed with respect to the taxation of
California Unitholders subject to the California Bank and Corporation Tax Law
and such California Unitholders are advised to consult their own tax advisors.
Please note, however, that interest on the underlying Bonds attributed to a
California Unitholder that is subject to the California Bank and Corporation Tax
Law may be includible in its gross income for purposes of determining its
California franchise tax. We have not examined any of the Bonds to be deposited
and held in the California IM-IT Trust or the proceedings for the issuance
thereof or the opinions of bond counsel with respect thereto, and we express no
opinion with respect to taxation under any other provisions of the California
law. Ownership of the Units may result in collateral California tax consequences
to certain taxpayers. Prospective investors should consult their tax advisors as
to the applicability of any such collateral consequences.

     THE SPONSOR. Van Kampen Funds Inc. (formerly Van Kampen American Capital
Distributors, Inc.) is the Sponsor of the Trust. The Sponsor is an indirect
subsidiary of Van Kampen Investments Inc. (formerly VK/AC Holding, Inc.). Van
Kampen Investments Inc. is a wholly-owned subsidiary of MSAM Holdings II, Inc.,
which in turn is a wholly-owned subsidiary of Morgan Stanley Dean Witter & Co.
(formerly Morgan Stanley, Dean Witter, Discover & Co.). American Portfolio
Evaluation Services, a division of Van Kampen Investment Advisory Corp.
(formerly Van Kampen American Capital Investment Advisory Corp.) is the
Evaluator of the Trust and is an affiliate of the Sponsor.

   UNDERWRITING. The Underwriters named below have purchased Units in the
following amounts from the Sponsor. For additional information regarding the
Underwriters, including information relating to compensation and benefits
received by the Underwriters, see "Public Offering--Sponsor and Underwriter
Compensation" in Prospectus Part II.

<TABLE>
<CAPTION>
    NAME                                      ADDRESS                                                         UNITS
                                                                                                              -----
<S>                                           <C>                                                             <C>
  Van Kampen Funds Inc.                       One Parkview Plaza, Oakbrook Terrace, Illinois 60181            1,318
  Morgan Stanley Dean Witter & Co.            2 World Trade Center, 59th Floor, New York, New York 10048        300
  Gruntal & Company, L.L.C.                   14 Wall Street, New York, New York 10005                          100
  CIBC Oppenheimer                            World Financial Center, 8th Floor, New York, New York 10281       100
  M.L. Stem & Company, Inc.                   8350 Wilshire Boulevard, Beverly Hills, California 90211          100
  Prudential Securities Inc.                  1 New York Plaza, 14th Floor, New York, New York 10292-2014       100
                                                                                                              -----
                                                                                                              2,018
                                                                                                              =====
</TABLE>

   LETTER OF INTENT. A purchaser desiring to purchase during a 13 month period
$500,000 or more of any combination of series of Van Kampen unit investment
trusts may qualify for a reduced sales charge by signing a nonbinding Letter of
Intent with any single broker-dealer. After signing a Letter of Intent, at the
date total purchases, less redemptions, of units of any combination of series of
Van Kampen unit investment trusts by a purchaser (including 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) exceed $500,000, the selling broker-dealer,
bank or other will credit the unitholder with cash as a retroactive reduction of
the sales charge on such units equal to the amount which would have been paid
for the total aggregated sale amount. If a purchaser does not complete the
required purchases under the Letter of Intent within the 13 month period, no
such retroactive sales charge reduction shall be made.

                     REPORT OF CERTIFIED PUBLIC ACCOUNTANTS

     To the Board of Directors of Van Kampen Funds Inc. and the Unitholders of
California Insured Municipals Income Trust, Series 176 (included in Insured
Municipals Income Trust and Investors' Quality Tax-Exempt Trust, Multi-Series
306):

     We have audited the accompanying statement of condition and the portfolio
of California Insured Municipals Income Trust, Series 176 (included in Insured
Municipals Income Trust and Investors' Quality Tax-Exempt Trust, Multi-Series
306) as of October 5, 1998. The statement of condition and portfolio 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 an irrevocable letter of credit deposited to purchase tax-exempt
bonds 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 California Insured
Municipals Income Trust, Series 176 (included in Insured Municipals Income Trust
and Investors' Quality Tax-Exempt Trust, Multi-Series 306) as of October 5,
1998, in conformity with generally accepted accounting principles.

   Chicago, Illinois                                        GRANT THORNTON LLP
   October 5, 1998

                             STATEMENT OF CONDITION
                              AS OF OCTOBER 5, 1998

      INVESTMENT IN BONDS

Contracts to purchase Bonds (1)(2)                         $           1,919,130
Accrued interest to the First Settlement Date (1)(2)                      16,992
                                                            --------------------
      Total                                                $           1,936,122
                                                            ====================
      LIABILITY AND INTEREST OF UNITHOLDERS
Liability--
      Accrued interest payable to Sponsor (1)(2)           $              16,992
Interest of Unitholders--
      Cost to investors                                                2,018,000
      Less: Gross underwriting commission                                 98,870
                                                           --------------------
      Net interest to Unitholders (1)(2)                               1,919,130
                                                            --------------------
      Total                                                $           1,936,122
                                                            ====================

- --------------------------------------------------------------------------------
(1) The value of the Bonds is determined by Interactive Data Corporation on the
    bases set forth under "Public Offering--Offering Price" in Prospectus Part
    II. The contracts to purchase Bonds are collateralized by an irrevocable
    letter of credit in an amount sufficient to satisfy such contracts.

(2) The Trustee will advance the amount of the net interest accrued to the First
    Settlement Date to the Trust for distribution to the Sponsor as the
    Unitholder of record as of such date.

                                PROSPECTUS PART I

                                 OCTOBER 5, 1998

    INSURED MUNICIPALS INCOME TRUST AND INVESTORS' QUALITY TAX-EXEMPT TRUST,
                                MULTI-SERIES 306

             CALIFORNIA INSURED MUNICIPALS INCOME TRUST, SERIES 176

                              VAN KAMPEN FUNDS INC.

                               One Parkview Plaza
                        Oakbrook Terrace, Illinois 60181

                             2800 Post Oak Boulevard
                              Houston, Texas 77056

     THIS PROSPECTUS PART I MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY PART
II. BOTH PARTS OF THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE.

                                   VAN KAMPEN
                                PROSPECTUS PART I

             VIRGINIA INVESTORS' QUALITY TAX-EXEMPT TRUST, SERIES 82

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

   Virginia Investors' Quality Tax-Exempt Trust, Series 82 (the "Trust")
(included in Insured Municipals Income Trust and Investors' Quality Tax-Exempt
Trust, Multi-Series 306 (the "Fund")) consists of interest-bearing obligations
issued by or on behalf of municipalities and other governmental authorities, the
interest on which is, in the opinion of bond counsel to the issuer, exempt from
all Federal income taxes under existing law and exempt to the extent described
herein from Virginia state and local taxes when held by residents of Virginia
(the "Bonds"). The objective of the Trust is Federal and Virginia tax-exempt
income and conservation of capital through an investment in a diversified
portfolio of tax-exempt bonds. The Trust is referred to herein as the "State
Trust" or "Quality Trust."

   The Trust consists of 8 issues of Bonds. One of the Bonds 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) as follows: Water and Sewer, 3 (40%); Retail Electric/Gas/Telephone, 2
(28%); Health Care, 1 (15%); Public Building, 1 (12%) and General Obligation, 1
(5%). The dollar weighted average maturity of the Bonds is 27 years.

                                             Monthly             Semi-Annual
                                       ------------------    ------------------
Estimated Current Return:                     4.28%                  4.32%
Estimated Long Term Return:                   4.27%                  4.31%
CUSIP:                                     927837-12-0            927837-13-8

   Estimated Current Return shows the estimated cash to be received each year
from the Bonds (net of estimated annual expenses) divided by the Public Offering
Price (including the sales charge).

   Estimated Long-Term Return shows the estimated return over the estimed life
of the Trust. This is based on an average of the yields to maturity (or an
earlier call date) of the Bonds adjusted to reflect the sales charge and
estimated expenses. The average yield for the portfolio is derived by weighting
each Bond's yield by its value and the time remaining to the call or maturity
date, depending on how the Bond is priced. Unlike Estimated Current Return,
Estimated Long-Term Return accounts for maturities, discounts and premiums of
the Bonds.

   No return calculation can predict your actual return because returns vary
with purchase price, sales charges, the length of time Units are held and
changes in portfolio composition, interest income and expenses. The estimated
returns are designed to show a comparison rather than a prediction of returns. A
yield calculation, which is more comparable to a calculation on an individual
bond, may be higher or lower than these estimated returns which are more
comparable to return calculations of other investment products.

                                 OCTOBER 5, 1998

     THIS PROSPECTUS PART I MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY PART
II. BOTH PARTS OF THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE.

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

                   SUMMARY OF ESSENTIAL FINANCIAL INFORMATION

Initial Date of Deposit:                                         October 5, 1998
Principal Amount of Bonds:                                       $     1,990,000
Principal Amount of Bonds per Unit (1):                          $        970.73
Number of Units:                                                           2,050
- --------------------------------------------------------------------------------
PUBLIC OFFERING PRICE
- --------------------------------------------------------------------------------
Aggregate Offering Price of Bonds                                    $ 1,949,559
Aggregate Offering Price of Bonds per Unit                           $    951.00
  Plus Sales Charge per Unit                                         $     49.00
Public Offering Price per Unit (2)                                   $  1,000.00
Redemption Price per Unit                                            $    943.91
- --------------------------------------------------------------------------------
ESTIMATED ANNUAL INCOME PER UNIT
- --------------------------------------------------------------------------------
                                                                       Semi-
                                                          Monthly      Annual
                                                        -----------  -----------
Estimated Interest Income                               $     44.82  $     44.82
  Less Estimated Expenses                               $      2.02  $      1.58
Estimated Net Interest Income                           $     42.80  $     43.24
- --------------------------------------------------------------------------------
ESTIMATED DISTRIBUTIONS
- --------------------------------------------------------------------------------
                                                                  Semi-
                                              Monthly             Annual
                                         ----------------- ---------------------
Initial Distribution                     $         3.80 on $             3.84 on
                                         November 25, 1998     November 25, 1998
Normal Distribution (3)                  $            3.56 $               21.62
Record Dates                                   10th day of       November 10 and
                                                each month                May 10
Distribution Dates                             25th day of       November 25 and
                                                each month                May 25
- --------------------------------------------------------------------------------
EXPENSES
- --------------------------------------------------------------------------------
                                                                       Semi-
                                                          Monthly      Annual
                                                        -----------  -----------
Sales Charge (% of Public Offering Price)                     4.90%        4.90%
Estimated Annual Expenses per Unit
  Trustee's Fee (4) (5)                                 $      0.91  $      0.51
  Evaluator's Supervisory Fee                           $      0.25  $      0.25
  Evaluator's Evaluation Fee (4)                        $      0.30  $      0.30
  Other Operating Expenses                              $      0.80  $      0.76
                                                        -----------  -----------
Total Annual Expenses per Unit                          $      2.26  $      1.82
                                                        ===========  ===========

(1) Because certain of the Bonds may from time to time under certain
    circumstances be sold or redeemed or will be called or mature in accordance
    with their terms (including the call or sale of zero coupon bonds at prices
    less than par value), there is no guarantee that the value of each Unit at
    Trust termination will be equal to the Principal Amount of Bonds per Unit.

(2) After the First Settlement Date (October 8, 1998), Unitholders will pay
    accrued interest from such date to the settlement date less distributions
    from the Interest Account after the First Settlement Date.

(3) This is based on estimated cash flows per Unit which will vary with changes
    in expenses, interest rates and maturity, call, exchange or sale of the
    Bonds. Estimated cash flows are set forth in the Information Supplement or
    are available upon request.

(4) This fee is assessed per $1,000 principal amount of Bonds. Other fees are
    assessed per Unit.

(5) During the first year the Trustee will reduce its fee by approximately $.24
    per Unit (which is the estimated interest to be earned prior to the expected
    delivery dates for the "when, as and if issued" Bonds). Should the interest
    exceed this amount, the Trustee will reduce its fee up to its annual fee.
    After the first year, the Trustee's fee will be the amount indicated above.
    Estimated interest income will increase to $45.06. Estimated General
    Expenses will increase to $2.26 and $1.82 under the monthly and semi-annual
    distribution plans, respectively. Estimated Net Interest Income will remain
    as shown.

<TABLE>
<CAPTION>
PORTFOLIO
- ---------------------------------------------------------------------------------------------------------------------
                                                                                                          OFFERING
                                                                                                          PRICE TO
                                                                          RATING(3)                       VIRGINIA
- ---------------------------------------------------------------------------------------------------------------------
AGGREGATE    NAME OF ISSUER, TITLE, INTEREST RATE AND                     STANDARD       REDEMPTION       QUALITY
PRINCIPAL    MATURITY DATE OF BONDS (1)(2)                            & POORS   MOODY'S  FEATURE(4)       TRUST(2)
- -----------  ------------------------------------------------------   -------   -------  --------------  ------------
<S>          <C>                                                      <C>       <C>      <C>             <C>
$   100,000   Puerto Rico Commonwealth, Capital Appreciation Refunding
                General Obligation Bonds (MBIA Insured)
                #0.00% Due 07/01/2016.............................      AAA      Aaa                      $   44,402
    300,000   Puerto Rico, Electric Power Authority, Power Revenue
                Refunding Bonds, Series GG (FSA Insured)                                 2009 @ 101.50
                #4.75% Due 07/01/2021.............................      AAA      Aaa     2019 @ 100 S.F.     301,065
    250,000   Russell County, Virginia, Industrial Development Authority,
                Appalachian Power Company Project, Revenue Bonds,
                Series H (MBIA Insured)
                5.00% Due 11/01/2021##............................      AAA      Aaa     2008 @ 101          252,965
    300,000   Fairfax County, Virginia, Industrial Development Authority,
                Revenue Refunding Health Care Bonds (Inova Health)
                Series A                                                                 2008 @ 101
                #5.00% Due 08/15/2025.............................      AA       Aa2     2019 @ 100 S.F.     305,175
    250,000   Fairfax County, Virginia, Water Authority, Water Revenue
                Refunding Bonds                                                          2007 @ 102
                #5.00% Due 04/01/2029.............................      AA       Aa2     2022 @ 100 S.F.     254,785
    300,000   Prince William County, Virginia, Service Authority, Water
                and Sewer Revenue Refunding Bonds (FGIC Insured)                         2008 @ 101
                #4.75% Due 07/01/2029.............................      AAA      Aaa     2023 @ 100 S.F.     298,896
    250,000   Upper Occoquan Sewage Authority, Virginia, Regional
                Sewerage System Revenue Bonds, Series 1995A
                (MBIA Insured)                                                           2006 @ 100
                #4.75% Due 07/01/2029.............................      AAA      Aaa     2026 @ 100 S.F.     248,443
    240,000   Rappahannock, Virginia, Regional Jail Authority (Regional
                Jail Facility) Revenue Bonds (MBIA Insured)                              2008 @ 102
                #5.00% Due 12/01/2030.............................      AAA      Aaa     2026 @ 100 S.F.     243,828
- ------------                                                                                              ----------
$ 1,990,000                                                                                               $ 1,949,559
============                                                                                              ==========
</TABLE>

For an explanation of the footnotes used on this page, see "Notes to Portfolio".

NOTES TO PORTFOLIO

(1) The Bonds 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. Contracts to
    acquire the Bonds were entered into during the period from September 29,
    1998 to October 2, 1998.

(2) Other information regarding the Bonds is as follows:

                     COST TO           PROFIT (LOSS)
                     SPONSOR            TO SPONSOR
                 ---------------      ---------------
                   $ 1,925,688            $ 23,871
- -----------

    The Sponsor may have entered into contracts which hedge interest rate
    fluctuations on certain Bonds. The cost of any such contracts and the
    corresponding gain or loss is included in the Cost to Sponsor. Bonds marked
    by "##" following the maturity date have been purchased on a "when, as and
    if issued" or "delayed delivery" basis. Interest on these Bonds 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. "#" prior to the coupon rate indicates that the Bond
    was issued at an original issue discount. See "The Trusts--Risk Factors" in
    Prospectus Part II. The tax effect of Bonds issued at an original issue
    discount is described in "Federal Tax Status" in Prospectus Part II.

(3) All ratings are by Standard & Poor's unless otherwise indicated. "*"
    indicates that the rating of the Bond is by Moody's. "o" indicates that the
    rating is contingent upon receipt by the rating agency of a policy of
    insurance obtained by the issuer of the bonds. "N/R" indicates that the
    rating service did not provide a rating for that Bond. For a brief
    description of the ratings see "Description of Ratings" in the Information
    Supplement.

(4) This is the year in which each Bond is initially or currently callable and
    the call price for that year. Each Bond 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. 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. See "The Trusts--Risk Factors" in
    Prospectus Part II.

   VIRGINIA RISK FACTORS. The financial condition of the Commonwealth of
Virginia is affected by various national, economic, social and environmental
policies and conditions. The Virginia Constitution requires a balanced biennial
budget and contains limits on the amount of general obligation bonds which the
Commonwealth can issue. Additionally, Constitutional and statutory limitations
concerning taxes, bond indebtedness and other matters may constrain the
revenue-generating capacity of the Commonwealth and its local governments and,
therefore, the ability of the issuers of the Bonds to satisfy their obligations.

      The economic vitality of the Commonwealth and its various regions and,
therefore, the ability of the Commonwealth and its local governments to satisfy
the Bonds, are affected by numerous factors. The employment in the Commonwealth
has been and continues to be significantly and adversely affected by the
cutbacks in federal government spending, particularly defense, and the reduction
of jobs in the mining industry.

      The Commonwealth is a party to numerous lawsuits in which an adverse final
decision could materially affect the Commonwealth's governmental operations and
consequently, its ability to pay debt service on its obligations.

      The Commonwealth of Virginia currently maintains a "triple A" bond rating
from Standard & Poor's, Moody's and Fitch IBCA, Inc. (formerly Fitch Investors
Service, L.P.).

      Further information concerning Virginia risk factors may be obtained upon
request to the Sponsor as described in "Additional Information" appearing in
Prospectus Part II.

   TAX STATUS. The Internal Revenue Service Restructuring and Reform Act of 1998
provides that for taxpayers other than corporations, net capital gain (which is
defined as net long-term capital gain over net short-term capital loss for the
taxable year) realized from property (with certain exclusions) is subject to a
maximum marginal stated tax rate of 20% (10% in the case of certain taxpayers in
the lowest tax bracket). Capital gain or loss is long-term if the holding period
for the asset is more than one year, and is short-term if the holding period for
the asset is one year or less. The date on which a Unit is acquired (i.e., the
"trade date") is excluded for purposes for determining the holding period of the
Unit. The legislation is generally effective retroactively for amounts properly
taken into account on or after January 1, 1998. Capital gains realized from
assets held for one year or less are taxed at the same rates as ordinary income.
For a discussion of the Federal tax status of income earned on Virginia Quality
Trust Units, see "Federal Tax Status" in Part II of this Prospectus.

   The assets of the Trust will consist of interest-bearing obligations issued
by or on behalf of the Commonwealth of Virginia or counties, municipalities,
authorities or political subdivisions thereof (the "Virginia Bonds") and certain
bonds issued by Puerto Rico authorities (the "Possession Bonds," and
collectively with the Virginia Bonds, the "Bonds").

   Neither the Sponsor nor its counsel have independently examined the Bonds to
be deposited in and held in the Trust. However, although no opinion is expressed
herein regarding such matters, it is assumed that: (i) the Bonds were validly
issued, (ii) the interest thereon is excludible from gross income for federal
income tax purposes and (iii) the interest thereon is exempt from income tax
imposed by Virginia that is applicable to individuals and corporations (the
"Virginia Income Tax") and, with respect to the Possession Bonds, bond counsel
to the issuing authorities rendered opinions as to the exemption from all state
and local taxation. The opinion set forth below does not address the taxation of
persons other than full time residents of Virginia.

   In the opinion of Chapman and Cutler, special counsel to the Fund for
Virginia tax matters, under existing law as of the date of this prospectus and
based upon the assumptions set forth above:

                  (1) The Virginia Quality Trust is not an association taxable
            as a corporation for purposes of the Virginia Income Tax and each
            Unitholder of the Trust will be treated as the owner of a pro rata
            portion of each of the assets held by the Trust and the income of
            such portion of the Virginia Quality Trust will be treated as income
            of the Unitholder for purposes of the Virginia Income Tax.

                  (2) Interest on the Virginia Bonds which is exempt from
            Virginia Income Tax when received by the Virginia Quality Trust, and
            which would be exempt from Virginia Income Tax if received directly
            by a Unitholder, will retain its status as exempt from such tax when
            received by the Trust and distributed to such Unitholder.

                  (3) Interest on the Possession Bonds which is excludible from
            gross income for federal income tax purposes and is exempt from
            state and local taxation pursuant to federal law when received by
            the Trust will be exempt from Virginia income taxation and therefore
            will not be includible in the income of the Unitholder for Virginia
            income tax purposes when distributed by the Trust and received by
            the Unitholders.

                  (4) The Virginia legislature has enacted a law, effective July
            1, 1997, that would exempt from the Virginia Income Tax income
            derived on the sale or exchange of obligations of the Commonwealth
            of Virginia or any political subdivision or instrumentality of the
            Commonwealth of Virginia. However, Virginia law does not address
            whether this exclusion would apply to gains recognized through
            entities such as the Virginia Quality Trust. Accordingly, we express
            no opinion as to the treatment for Virginia Income Tax purposes of
            any gain or loss recognized by a Unitholder for federal income tax
            purposes.

                  (5) The Virginia Income Tax does not permit a deduction of
            interest paid on indebtedness incurred or continued to purchase or
            carry Units in the Virginia Quality Trust to the extent that
            interest income related to the ownership of Units is exempt from the
            Virginia Income Tax.

   In the case of Unitholders subject to the Virginia Bank Franchise Tax, the
income derived by such a Unitholder from his pro rata portion of the Bonds held
by the Virginia Quality Trust may affect the determination of such Unitholder's
Bank Franchise Tax. Prospective investors subject to the Virginia Bank Franchise
Tax should consult their tax advisors. Chapman and Cutler has expressed no
opinion with respect to taxation under any other provisions of Virginia law.
Ownership of the Units may result in collateral Virginia tax consequences to
certain taxpayers. Prospective investors should consult their tax advisors to
the applicability of any such collateral consequences.

     THE SPONSOR. Van Kampen Funds Inc. (formerly Van Kampen American Capital
Distributors, Inc.) is the Sponsor of the Trust. The Sponsor is an indirect
subsidiary of Van Kampen Investments Inc. (formerly VK/AC Holding, Inc.). Van
Kampen Investments Inc. is a wholly-owned subsidiary of MSAM Holdings II, Inc.,
which in turn is a wholly-owned subsidiary of Morgan Stanley Dean Witter & Co.
(formerly Morgan Stanley, Dean Witter, Discover & Co.). American Portfolio
Evaluation Services, a division of Van Kampen Investment Advisory Corp.
(formerly Van Kampen American Capital Investment Advisory Corp.) is the
Evaluator of the Trust and is an affiliate of the Sponsor.

   UNDERWRITING. The Underwriters named below have purchased Units in the
following amounts from the Sponsor. For additional information regarding the
Underwriters, including information relating to compensation and benefits
received by the Underwriters, see "Public Offering--Sponsor and Underwriter
Compensation" in Prospectus Part II.

<TABLE>
<CAPTION>
    NAME                                      ADDRESS                                                         UNITS
                                                                                                              -----
<S>                                           <C>                                                             <C>
  Van Kampen Funds Inc.                       One Parkview Plaza, Oakbrook Terrace, Illinois 60181            1,450
  Morgan Stanley Dean Witter & Co.            2 World Trade Center, 59th Floor, New York, New York 10048        300
  Gruntal & Company, L.L.C.                   14 Wall Street, New York, New York 10005                          100
  Prudential Securities Inc.                  1 New York Plaza, 14th Floor, New York, New York 10292-2014       100
  Wheat First Union                           River Front Plaza, 901 East Byrd Street, Richmond, Virginia 23219 100
                                                                                                              -----
                                                                                                              2,050
                                                                                                              =====
</TABLE>

   LETTER OF INTENT. A purchaser desiring to purchase during a 13 month period
$500,000 or more of any combination of series of Van Kampen unit investment
trusts may qualify for a reduced sales charge by signing a nonbinding Letter of
Intent with any single broker-dealer. After signing a Letter of Intent, at the
date total purchases, less redemptions, of units of any combination of series of
Van Kampen unit investment trusts by a purchaser (including 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) exceed $500,000, the selling broker-dealer,
bank or other will credit the unitholder with cash as a retroactive reduction of
the sales charge on such units equal to the amount which would have been paid
for the total aggregated sale amount. If a purchaser does not complete the
required purchases under the Letter of Intent within the 13 month period, no
such retroactive sales charge reduction shall be made.

                     REPORT OF CERTIFIED PUBLIC ACCOUNTANTS

     To the Board of Directors of Van Kampen Funds Inc. and the Unitholders of
Virginia Investors' Quality Tax-Exempt Trust, Series 82 (included in Insured
Municipals Income Trust and Investors' Quality Tax-Exempt Trust, Multi-Series
306):

     We have audited the accompanying statement of condition and the portfolio
of Virginia Investors' Quality Tax-Exempt Trust, Series 82 (included in Insured
Municipals Income Trust and Investors' Quality Tax-Exempt Trust, Multi-Series
306) as of October 5, 1998. The statement of condition and portfolio 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 an irrevocable letter of credit deposited to purchase tax-exempt
bonds 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 Virginia Investors' Quality
Tax-Exempt Trust, Series 82 (included in Insured Municipals Income Trust and
Investors' Quality Tax-Exempt Trust, Multi-Series 306) as of October 5, 1998, in
conformity with generally accepted accounting principles.

   Chicago, Illinois                                        GRANT THORNTON LLP
   October 5, 1998

                             STATEMENT OF CONDITION
                              AS OF OCTOBER 5, 1998

      INVESTMENT IN BONDS

Contracts to purchase Bonds (1)(2)                         $           1,949,559
Accrued interest to the First Settlement Date (1)(2)                      14,965
                                                            --------------------
      Total                                                 $          1,964,524
                                                            ====================
      LIABILITY AND INTEREST OF UNITHOLDERS
Liability--
      Accrued interest payable to Sponsor (1)(2)            $             14,965
Interest of Unitholders--
      Cost to investors                                                2,050,000
      Less: Gross underwriting commission                                100,441
                                                            --------------------
      Net interest to Unitholders (1)(2)                               1,949,559
                                                            --------------------
      Total                                                 $          1,964,524
                                                            ====================

- --------------------------------------------------------------------------------
(1) The value of the Bonds is determined by Interactive Data Corporation on the
    bases set forth under "Public Offering--Offering Price" in Prospectus Part
    II. The contracts to purchase Bonds are collateralized by an irrevocable
    letter of credit in an amount sufficient to satisfy such contracts.

(2) The Trustee will advance the amount of the net interest accrued to the First
    Settlement Date to the Trust for distribution to the Sponsor as the
    Unitholder of record as of such date.

                                PROSPECTUS PART I

                                 OCTOBER 5, 1998

    INSURED MUNICIPALS INCOME TRUST AND INVESTORS' QUALITY TAX-EXEMPT TRUST,
                                MULTI-SERIES 306

             VIRGINIA INVESTORS' QUALITY TAX-EXEMPT TRUST, SERIES 82

                              VAN KAMPEN FUNDS INC.

                               One Parkview Plaza
                        Oakbrook Terrace, Illinois 60181

                             2800 Post Oak Boulevard
                              Houston, Texas 77056

     THIS PROSPECTUS PART I MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY PART
II. BOTH PARTS OF THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE.

February 1998

                           VAN KAMPEN AMERICAN CAPITAL
                               PROSPECTUS PART II

INSURED MUNICIPALS INCOME TRUST, INSURED MULTI-SERIES AND
INSURED MUNICIPALS INCOME TRUST AND INVESTORS' QUALITY TAX-EXEMPT TRUST,
  MULTI-SERIES
- --------------------------------------------------------------------------------

   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 portfolio of tax-exempt bonds. The Fund consists of the
underlying separate unit investment trusts set forth in Prospectus Part I. The
Bonds are interest-bearing obligations issued by or on behalf of municipalities
and other governmental authorities, the interest on which is exempt from all
Federal income taxes under existing law in the opinion of bond counsel to the
issuer. In addition, the interest income of each State Trust is, in the opinion
of bond counsel to the issuer, exempt to the extent indicated from state and
local taxes, when held by residents of the state where the issuers of the Bonds
are located. Except in specific instances as noted in Prospectus Part I, the
information contained in this Prospectus Part II shall apply to each Trust in
its entirety.

   "AAA" RATING FOR THE INSURED TRUSTS. Insurance guaranteeing the payments of
principal and interest, when due, on the Bonds in each Insured Trust has been
obtained from a municipal bond insurance company. See "Insurance on the Bonds in
the Insured Trusts". Insurance relates only to the Bonds and not to the Units 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, A Division
of the McGraw-Hill Companies ("Standard & Poor's"). Units of the Trusts are not
insured by the FDIC, are not deposits or other obligations of, or guaranteed by,
any government agency and are subject to investment risk, including possible
loss of the principal amount invested.

   PUBLIC OFFERING PRICE. The Public Offering Price of Units during the initial
offering period includes the aggregate offering price of the Bonds, the
applicable sales charge, cash, if any, in the Principal Account of the Trust,
and accrued interest, if any. Sales charges for the Trusts are set forth under
"Public Offering--General." During the initial offering period, the sales charge
is reduced for sales involving at least 100 Units.

   ESTIMATED CURRENT AND LONG-TERM RETURNS. The Estimated Current Returns and
Estimated Long-Term Returns to Unitholders are described on the cover of 
Prospectus Part I. See "Estimated Current and Long-Term Returns."

   DISTRIBUTION OPTIONS. Unitholders may elect to receive distributions on a
monthly or semi-annual basis. See "Rights of Unitholders--Distributions of
Interest and Principal". Those indicating no choice will be deemed to have
chosen the monthly distribution plan.

   MARKET FOR UNITS. Although not obligated to do so, the Sponsor intends to,
and certain of the other Underwriters may, maintain a secondary market for the
Units. If a secondary market is not available, a Unitholder will always be able
to redeem his Units through the Trustee on any business day. See "Rights of
Unitholders--Redemption of Units" and "Public Offering--Market for Units".

   REINVESTMENT OPTION. Unitholders may reinvest their distributions into Van
Kampen American Capital or Morgan Stanley mutual funds. See "Rights of
Unitholders--Reinvestment Option". Unitholders may also have the option of
exchanging their investment for units of other Van Kampen American Capital unit
investment trusts at a reduced sales charge. Unitholders may obtain a prospectus
for such trusts from the Sponsor.

   RISK FACTORS. An investment in Units should be made with an understanding of
certain risks, including, among other factors, the inability of the issuer or an
insurer, if any, to pay the principal of or interest on a bond when due,
volatile interest rates, early call provisions, and changes to the tax status of
the Bonds. See "The Trusts--Risk Factors".

THIS PROSPECTUS PART II MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY PART I.
BOTH PARTS OF THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE.

   An Information Supplement has been filed with the Securities and Exchange
Commission ("SEC") and can be obtained without charge by calling (800) 856-8487
 or is available along with other related materials at the SEC's Internet site
   (http://www.sec.gov). This Prospectus incorporates by reference the entire
                            Information Supplement.

- --------------------------------------------------------------------------------
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
<PAGE>
THE TRUSTS
- --------------------------------------------------------------------------------

    THE FUND. This series of the Insured Municipals Income Trust or the Insured
Municipals Income Trust and Investors' Quality Tax-Exempt Trust (the "Fund"),
consists of the underlying separate unit investment trusts described in
Prospectus Part I. 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 Prospectus Part I (the "Date of Deposit") among Van Kampen American
Capital Distributors, Inc., as Sponsor, American Portfolio Evaluation Services,
a division of Van Kampen American Capital Investment Advisory Corp., as
Evaluator, and The Bank of New York, as Trustee.

    The Fund consists of separate portfolios of 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 purposes under existing law. All issuers of
Bonds in a State Trust are located in the state for which the Trust is named or
in United States territories or possessions and their public authorities;
consequently, in the opinion of recognized bond counsel to the Bond issuers, the
interest earned on the Bonds is exempt to the extent indicated in Prospectus
Part I from state and local taxes. Further, in the opinion of bond counsel to
the respective issuers, the interest income of each Bond in a U.S. Territorial
IM-IT Trust is exempt from state, Commonwealth of Puerto Rico and local income
taxation. With the exception of New York and Pennsylvania Trusts, Units of a
State Trust may be purchased only by residents of the state for which the Trust
is named. Units of a New York Trust may be purchased by residents of New York,
Connecticut and Florida. Units of a Pennsylvania Trust may be purchased by
residents of Pennsylvania, Connecticut, Florida, Maryland, New York, Ohio and
West Virginia. State Trusts, other than State Intermediate Laddered Maturity
Trusts or State Intermediate Trusts, are referred to herein as "Long-Term State
Trusts".

    On the Date of Deposit, the Sponsor deposited with the Trustee the aggregate
principal amount of Bonds indicated in the "Summary of Essential Financial
Information" in Prospectus Part I. The Bonds initially consist of delivery
statements relating to contracts for their purchase and cash, cash equivalents
and/or irrevocable letters of credit issued by a financial institution.
Thereafter, the Trustee, in exchange for the Bonds, delivered to the Sponsor
evidence of ownership of the number of Units indicated under "Summary of
Essential Financial Information" in Prospectus Part I.

    The portfolio of any IM-IT, IM-IT Discount, U.S. Territorial IM-IT,
Long-Term State or National Quality 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 portfolio of any State Intermediate Laddered
Maturity Trust is structured so that approximately 20% of the Bonds will mature
each year, beginning 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 the
Trust. However, the flexibility provided by the return of principal may also
eliminate a Unitholder's ability to reinvest at a rate as high as the yield on
the Bonds which matured.

    Each Unit initially offered represents a fractional undivided interest in
the principal and net income of a Trust. To the extent that any Units are
redeemed by the Trustee, the fractional undivided interest in a Trust
represented by each Unit will increase, although the actual interest in the
Trust will remain unchanged. Units will remain outstanding until redeemed by
Unitholders or until the termination of the Trust Agreement.

    OBJECTIVES AND BOND SELECTION. The objectives of the Fund are income exempt
from Federal income taxation and, in the case of a State Trust, Federal and
state income taxation and conservation of capital through an investment in
diversified portfolios of Federal and state 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 Bonds mature each year beginning in approximately the fifth
year of the Trust. There is, of course, no guarantee that the Trusts will
achieve their objectives. The Fund may be an appropriate investment vehicle for
investors who desire to participate in a portfolio of tax-exempt fixed income
bonds with greater diversification than they might be able to acquire
individually. Insurance guaranteeing the timely payment, when due, of all
principal and interest on the Bonds in each Insured Trust has been obtained from
a municipal bond insurance company. For information relating to insurance on the
Bonds, see "Insurance on the Bonds in the Insured Trusts". In addition, these
bonds are often not available in small amounts.

    In selecting Bonds for the Trusts, the Sponsor considered the following
factors, among others: (a) either the Standard & Poor's rating of the Bonds was
not less than "BBB-" for Insured Trusts and "A-" for Quality Trusts, or the
Moody's Investors Service, Inc. ("Moody's") rating of the Bonds was not less
than "Baa" for Insured Trusts and "A" for the Quality Trusts, including
provisional or conditional ratings, respectively, (or, if not rated, the Bonds
had credit characteristics sufficiently similar to the credit characteristics of
interest-bearing tax-exempt bonds that were so rated as to be acceptable for
acquisition by the Fund in the opinion of the Sponsor), (b) the prices of the
Bonds relative to other bonds of comparable quality and maturity, (c) the
diversification of Bonds as to purpose of issue and location of issuer and (d)
with respect to the Insured Trusts, the availability and cost of insurance.
After the Date of Deposit, a Bond 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 a Bond from a Trust but may be considered in the
Sponsor's determination as to whether or not to direct the Trustee to dispose of
the Bond (see "Fund Administration--Portfolio Administration").

    RISK FACTORS. The Trusts include certain types of bonds as described on the
cover of Prospectus Part I. An investment in Units should be made with an
understanding of the characteristics of and risks associated with such bonds.
The following is a brief summary of certain of these risks. Additional
information is included in Prospectus Part I and in the Information Supplement.
See "Additional Information". Neither the Sponsor nor the Trustee are liable for
any default, failure or defect in any of the Bonds.

    Certain of the Bonds may be general obligations of a governmental entity
that are backed by the taxing power of the entity. All other Bonds 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, both within a particular classification and between
classifications, depending on numerous factors.

    Mortgage loan obligations 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. 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. A substantial portion of these bonds
will probably be redeemed prior to their scheduled maturities or even prior to
their ordinary call dates. Additionally, unusually high rates of default on the
underlying mortgage loans may reduce revenues available for the payment of
principal of or interest on mortgage revenue bonds.

    Health care revenue bonds have ratings issued for health care facilities
that 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, competition with other health
care facilities, efforts by insurers and governmental agencies to limit rates
and legislation establishing state rate-setting agencies.

    Public utility bond issuers sell wholesale and retail electric power and
gas. General problems of these issuers include difficulty in financing large
construction programs in an inflationary period, costs and delays attributable
to environmental considerations, the difficulty of the capital market in
absorbing utility debt, difficulty in obtaining fuel at reasonable prices, the
effect of energy conservation and government regulations.

    Water and/or sewerage revenue bonds are generally payable from user fees.
The problems of these issuers include the ability to obtain rate increases,
population decline resulting in decreased user fees, financing, environmental
considerations, discovering fresh water and the impact of "no-growth" zoning
ordinances.

    Industrial revenue bonds ("IRBs") have generally been issued under bond
resolutions under which the revenues and receipts payable 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 which may be affected by such things as
cyclicality of revenues and earnings, regulatory and environmental restrictions,
litigation resulting from accidents, extensive competition and financial
deterioration resulting from a corporate restructuring.

    Lease bonds are secured by lease payments of a governmental entity and are
often in the form of certificates of participation. Although the lease bonds do
not constitute general obligations of the municipality for which the
municipality's taxing power is pledged, a lease bond is ordinarily backed by the
municipality's covenant to appropriate for and make the payments due under the
lease bond. However, certain lease bonds 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 and to make payments under its lease bond could result in
insufficient funds available for payment of the bonds secured thereby. Although
"non-appropriation" lease bonds are secured by the leased property, disposition
of the property in the event of foreclosure might prove difficult.

    Education bond issuers govern the operation of schools, colleges and
universities and revenues are derived mainly from ad valorem taxes or from
tuition, dormitory revenues, grants and endowments. General problems relating to
school bonds include litigation contesting the financing of public education, a
declining percentage of the population consisting of "college" age individuals,
inability to raise tuitions and fees sufficiently and government legislation or
regulations which may adversely affect the revenues or costs of the issuers.

    Transportation bonds are payable from revenues derived from the ownership
and operation of facilities such as airports, bridges, turnpikes, port
authorities, convention centers and arenas. Airport operating income may be
affected by the ability of the airlines to meet their obligations under use
agreements. Payment on bonds related to other facilities 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.

    Certain Bonds are payable from revenues derived from the operation of
resource recovery facilities which 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 circumstances
such as destruction or condemnation of a project, void or unenforceable
contracts, changes in the economic availability of raw materials, and operating
supplies or facilities, or other unavoidable changes adversely affecting the
operation of a project.

    Certain Bonds may have been acquired at a market discount from par value at
maturity. The interest rates on these bonds are lower than current market
interest rates for newly issued bonds of comparable rating and type. Generally,
if interest rates for newly issued comparable bonds increase, the market
discount of previously issued bonds will increase, and if interest rates for
newly issued comparable bonds decline, the market discount of previously issued
bonds will decrease. The value of bonds purchased at a market discount will
generally increase in value faster than bonds purchased at a market premium if
interest rates decrease. Conversely, if interest rates increase, the value of
bonds purchased at a market discount will generally decrease faster than bonds
purchased at a market premium. In addition, if interest rates rise, the
prepayment risk of higher yielding, premium bonds and the prepayment benefit for
lower yielding, discount bonds will be reduced. A bond purchased at a market
discount and held to maturity will have a larger portion of its total return in
the form of taxable income and capital gain and less in the form of tax-exempt
interest income than a comparable bond newly issued at current market rates. See
"Federal Tax Status." Market discount attributable to interest changes does not
indicate a lack of market confidence in the issue.

    Certain Bonds may be "original issue discount" bonds which were issued
with interest rates less than rates offered by comparable bonds and were
originally sold at a discount from their par value. These bonds may include
"zero coupon" bonds which are described below. In a stable interest rate
envronment, the market value of an original issue discount bond would tend to
increase more slowly in the early years and in greater increments as the bond
approached maturity. These bonds may be subject to redemption at prices based on
the issue price plus the amount of original issue discount accreted to
redemption plus some premium, if applicable. Under these call provisions, these
bonds may be called prior to maturity at a price less than par value. See
"Federal Tax Status" for a discussion of the tax consequenses of owning these
bonds.

    Certain Bonds may be "zero coupon" bonds. 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 these bonds is that a fixed yield is earned not
only on the original investment but also, in effect, on all discount earned
during the life of the bond. This implicit reinvestment of earnings at the same
rate eliminates the risk of being unable to reinvest income at a rate as high as
the implicit yield on the discount bond, but at the same time eliminates the
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 bonds of comparable quality which pay
interest.

    Certain Bonds may have been purchased on a "when, as and if issued" or
"delayed delivery" basis. The delivery of these Bonds may be delayed or may not
occur. Interest on these Bonds begins accruing to the benefit of Unitholders on
their respective dates of delivery. To the extent any Bonds are actually
delivered to a Trust after the expected dates of delivery, Unitholders who
purchase their Units prior to the actual delivery date would be required to
adjust their tax basis in their Units for a portion of the interest accruing on
those Bonds during the interval between their purchase of Units and the actual
delivery of the Bonds. As a result of any adjustment, the Estimated Current
Return during the first year would be slightly lower than stated herein.
Unitholders will be "at risk" with respect to all Bonds (i.e., may derive either
gain or loss from fluctuations in the value of the Bonds) from the date they
order Units.

    Certain Bonds 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 bond 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
bond price is at a premium over par than when it is at a discount from par. The
exercise of redemption or call provisions generally will 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. See "Portfolio" in Prospectus Part I for a list of the sinking fund and
call provisions, if any, with respect to the Bonds. The Sponsor is unable to
predict all of the circumstances which may result in redemption of a Bond.

    To the best knowledge of the Sponsor, there is no litigation pending as of
the Date of Deposit in respect of any Bonds which might reasonably be expected
to have a material adverse effect upon the Trusts. At any time after the Date of
Deposit, litigation may be initiated on a variety of grounds with respect to the
Bonds. Such litigation may affect the validity of the Bonds or the tax-free
nature of interest payments. While the outcome of litigation can never be
predicted, the Fund has received or will receive opinions of bond counsel to the
issuers of each Bond on the date of issuance to the effect that the Bonds have
been validly issued and interest payments are exempt from Federal income tax. In
addition, other factors may arise from time to time which potentially may impair
the ability of issuers to meet obligations undertaken with respect to the Bonds.

    Like other investment companies, financial and business organizations and
individuals around the world, the Trusts could be adversely affected if the
computer systems used by the Sponsor, Evaluator or Trustee or other service
providers to the Trusts do not properly process and calculate date-related
information and data from and after January 1, 2000. This is commonly known as
the "Year 2000 Problem." While the Sponsor, Evaluator and Trustee are taking
steps that they believe are reasonably designed to address the Year 2000
Problem, there can be no assurance that these steps will be sufficient to avoid
any adverse impact to the Trusts. The Year 2000 Problem may impact certain
issuers of the Bonds to varying degrees, however, the Sponsor is unable to
predict what impact, if any, the Year 2000 Problem will have on any issuer.

ESTIMATED CURRENT AND LONG-TERM RETURNS
- --------------------------------------------------------------------------------

    The Estimated Current Returns and the Estimated Long-Term Returns as of the
Date of Deposit are set forth on the cover of the Prospectus Part I. 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 Trust and
with the principal prepayment, redemption, maturity, exchange or sale of Bonds.
The Public Offering Price will vary with changes in the price of the Bonds.
Accordingly, 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 the Bonds and (2) takes into account the expenses and sales
charge associated with Units. Since the value and estimated retirements of the
Bonds 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 Bonds, it may be necessary for the Sponsor or
Trustee to pay amounts covering accrued interest on the Bonds which exceed the
amounts which will be made available through cash furnished by the Sponsor on
the Date of Deposit. This 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 excess and will be reimbursed when funds become available from
interest payments on the related Bonds. Also, since interest on any "when, as
and if issued" Bonds does not begin accruing as tax-exempt interest income to
the benefit of Unitholders until the date of delivery, the Trustee may reduce
its fee and pay Trust expenses in order to maintain or approach the same
estimated net annual interest income during the first year of the Trust's
operations as described under "Summary of Essential Financial Information" in
Prospectus Part I.

PUBLIC OFFERING
- --------------------------------------------------------------------------------

    GENERAL. Units are offered at the Public Offering Price. During the initial
offering period the Public Offering Price is based on the aggregate offering
price of the Bonds, the sales charge described below, cash, if any, in the
Principal Account and accrued interest, if any. After the initial public
offering period, the secondary market public offering price is based on the bid
prices of the Bonds, the sales charge described below, cash, if any, in the
Principal Account and accrued interest, if any. The minimum purchase in the
primary and secondary market is one Unit.

    The initial offering period sales charges are as follows:

<TABLE>
<CAPTION>
                                                                   INITIAL OFFERING PERIOD SALES CHARGE
                                                                               AS PERCENT OF
                                                                   ------------------------------------
                                                                   PUBLIC OFFERING       OFFERING PRICE
  TRUST                                                                  PRICE              OF BONDS
 ------------------------------------------------------------------------------------------------------
<S>                                                                <C>                   <C>
  IM-IT, U.S. Territorial IM-IT, Long-Term State and National 
    Quality Trusts                                                       4.900%               5.152%
  IM-IT Limited Maturity Trusts                                          4.300                4.493
  IM-IT Discount Trusts                                                  4.000                4.167
  IM-IT Intermediate Trusts                                              3.900                4.058
  State Intermediate Laddered Maturity Trusts                            3.000                3.093
  IM-IT Short Intermediate Trusts                                        2.000                2.041
</TABLE>

    The sales charge applicable to quantity purchases during the initial
offering period is reduced as follows:

<TABLE>
<CAPTION>
                                                              SALES CHARGE REDUCTION PER UNIT
                                    -----------------------------------------------------------------------------------
                                        IM-IT, U.S.
                                    TERRITORIAL IM-IT,
                                      LONG-TERM STATE
        AGGREGATE NUMBER OF            AND NATIONAL              IM-IT SHORT             IM-IT
         UNITS PURCHASED*             QUALITY TRUSTS         INTERMEDIATE TRUST      DISCOUNT TRUST       OTHER TRUSTS
- -----------------------------       --------------------    --------------------    ----------------      -------------
<S>                                 <C>                     <C>                     <C>                   <C>
100-249 Units                       $               4.00    $               2.00    $           2.00      $        4.00
250-499 Units                       $               6.00    $               3.00    $           4.00      $        6.00
500-999 Units                       $              14.00    $               4.00    $           6.00      $        9.00
1,000 or more Units                 $              19.00    $               6.00    $           8.00      $       11.00
- -----------------------------
</TABLE>

    * The breakpoint sales charges are also applied on a dollar basis
utilizing a breakpoint equivalent in the above table of $1,000 per Unit and will
be applied on whichever basis is more favorable to the investor. The breakpoints
will be adjusted to take into consideration purchase orders stated in dollars
which cannot be completely fulfilled due to the Trusts' requirement that only
whole Units be issued.

    The secondary market sales charge is computed as described in the following
table based upon the estimated long-term return life of a Trust's portfolio:

<TABLE>
<CAPTION>
 YEARS TO MATURITY    SALES CHARGE     YEARS TO MATURITY       SALES CHARGE   YEARS TO MATURITY      SALES CHARGE
 -----------------    ------------     -----------------       ------------   -----------------      ------------
<S>                   <C>              <C>                     <C>            <C>                    <C>
         1                  1.010%            8                      3.627%         15                     5.042%
         2                  1.523             9                      4.167          16                     5.152
         3                  2.041            10                      4.384          17                     5.263
         4                  2.302            11                      4.603          18                     5.374
         5                  2.564            12                      4.712          19                     5.485
         6                  2.828            13                      4.822          20                     5.597
         7                  3.093            14                      4.932          21 to 30               5.708
</TABLE>

    For purposes of computation of the estimated long-term return life, Bonds
will be deemed to mature on their expressed maturity dates unless: (a) the Bonds
have been called for redemption or are subject to redemption at an earlier call
date, in which case this call date will be deemed to be the maturity date; or
(b) the Bonds are subject to a "mandatory tender", in which case the mandatory
tender will be deemed to be the maturity date. The sales charges in the above
table are expressed as a percentage of the aggregate bid prices of the Bonds.
Expressed as a percent of the Public Offering Price, the sales charge on a Trust
consisting entirely of Bonds with 15 years to maturity would be 4.80%. The sales
charges in the table above do not apply to IM-IT Discount Trusts. The applicable
secondary market sales charges for an IM-IT Discount Trust are set forth in the
applicable Prospectus Part I.

    Any reduced sales charge is the responsibility of the selling Underwriter,
broker, dealer or agent. The Sponsor will, however, increase the concession or
agency commission for quantity purchases. The reduced sales charge structure in
the initial offering period sales charge table above will apply on all purchases
by the same person from any one Underwriter or dealer of units of Van Kampen
American Capital-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. In the
event units of more than one trust are purchased on the Initial Purchase Date,
the aggregate dollar amount of such purchases will be used to determine whether
purchasers are eligible for a reduced sales charge. Such aggregate dollar amount
will be divided by the public offering price per unit (on the day preceding the
date of purchase) of each respective trust purchased to determine the total
number of units which such amount could have purchased of each individual trust.
Purchasers must then consult the applicable trust's prospectus to determine
whether the total number of units which could have been purchased of a specific
trust would have qualified for a reduced sales charge and, if so qualified, the
amount of such reduction. Assuming a purchaser qualifies for a sales charge
reduction or reductions, to determine the applicable sales charge reduction or
reductions 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 ("immediate family members") 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 Units for one or more trust, estate or fiduciary
accounts.

    Employees, officers and directors (including their spouses, children,
grandchildren, parents, grandparents, siblings, mothers-in-law, fathers-in-law,
sons-in-law and daughters-in-law, and trustees, custodians or fiduciaries for
the benefit of such persons (collectively referred to herein as "related
purchasers")) of Van Kampen American Capital Distributors, Inc. and its
affiliates and Underwriters and their affiliates may purchase Units at the
Public Offering Price less the applicable underwriting commission or less the
applicable dealer concession in the absence of an underwriting commission.
Employees, officers and directors (including related purchasers) of dealers and
their affiliates and vendors providing services to the Sponsor may purchase
Units at the Public Offering Price less the applicable dealer concession.

    Purchasers of units of any two consecutive series of a Trust may aggregate
purchases of units of such series for purposes of the sales charge reduction for
quantity purchases, provided that at the time of the initial purchase of units
such purchaser submitted a purchase order for at least 100 units that was
partially unfulfilled due to a lack of units of such Trust series available for
sale at such time. The sales charge reduction shall be applied to the subsequent
purchase of units such that the aggregate sales charge reduction applicable to
both purchases will equal the amount described in the initial offering period
sales charge table above.

    Units may be purchased in the primary or secondary market at the Public
Offering Price (for purchases which do not qualify for a sales charge reduction
for quantity purchases) less the concession the Sponsor typically allows to
brokers and dealers for purchases by (1) investors who purchase Units through
registered investment advisers, certified financial planners and registered
broker-dealers who in each case either charge periodic fees for financial
planning, investment advisory or asset management services, or provide such
services in connection with the establishment of an investment account for which
a comprehensive "wrap fee" charge is imposed, (2) bank trust departments
investing funds over which they exercise exclusive discretionary investment
authority and that are held in a fiduciary, agency, custodial or similar
capacity, (3) any person who for at least 90 days, has been an officer, director
or bona fide employee of any firm offering Units for sale to investors or their
immediate family members (as described above) and (4) officers and directors of
bank holding companies that make Units available directly or through
subsidiaries or bank affiliates. Notwithstanding anything to the contrary in
this Prospectus, such investors, bank trust departments, firm employees and bank
holding company officers and directors who purchase Units through this program
will not receive sales charge reductions for quantity purchases.

    OFFERING PRICE. The Public Offering Price of Units will vary from the
amounts stated under "Summary of Essential Financial Information" in Prospectus
Part I in accordance with fluctuations in the prices of the Bonds. The price of
Units on the Date of Deposit was determined by adding the applicable sales
charge to the aggregate offering price of the Bonds and dividing the sum by the
number of Units outstanding. This price determination was made on the basis of
an evaluation of the Bonds prepared by Interactive Data Corporation, a firm
regularly engaged in the business of evaluating, quoting or appraising
comparable securities. During the initial offering period, the Evaluator will
value the Bonds as of the Evaluation Time on days the New York Stock Exchange is
open for business and will adjust the Public Offering Price of Units
accordingly. This Public Offering Price will be effective for all orders
received at or prior to the Evaluation Time on each such day. The "Evaluation
Time" is the close of trading on the New York Stock Exchange on each day that
the Exchange is open for trading. 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. The secondary market Public Offering Price per Unit will
be equal to the aggregate bid price of the Bonds plus the applicable secondary
market sales charge and dividing the sum by the number of Units outstanding. For
secondary market purposes, this computation will be made by the Evaluator as of
the Evaluation Time for each day on which any Unit is tendered for redemption
and as necessary. The offering price of Bonds may be expected to average
approximately 0.5%-1% more than the bid price.

    The aggregate price of the Bonds is determined on the basis of bid prices or
offering prices, as is appropriate, (a) on the basis of current market prices
obtained from dealers or brokers who customarily deal in bonds comparable to
those held by the Fund; (b) if these prices are not available, on the basis of
current market prices for comparable bonds; (c) by causing the value of the
Bonds 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 Bonds 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 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 default (the "Defaulted Bonds") the value of any 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 Defaulted Bonds not covered by Permanent Insurance. In
addition, the Evaluator will consider the ability of a Portfolio Insurer to meet
its commitments under any insurance policy, including commitments to issue
Permanent Insurance. No value has been ascribed to insurance obtained by an
Insured Trust, if any, as of the date of this Prospectus.

    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.

    ACCRUED INTEREST. Accrued interest is an accumulation of unpaid interest on
securities which generally is paid semi-annually, although each Trust accrues
interest daily. Because of this, a Trust always has an amount of interest earned
but not yet collected by the Trustee. For this reason, with respect to sales
settling after the First Settlement Date, the proportionate share of accrued
interest to the settlement date is added to the Public Offering Price of Units.
Unitholders will receive the amount of accrued interest paid on their Units on
the next distribution date. In an effort to reduce the accrued interest which
would have to be paid by Unitholders, the Trustee will advance the amount of
accrued interest to the Sponsor as the Unitholder of record as of the First
Settlement Date. Consequently, the accrued interest added to the Public Offering
Price of Units will include only accrued interest from the First Settlement Date
to the date of settlement, less any distributions from the Interest Account
after the First Settlement Date. Because of the varying interest payment dates
of the Bonds, accrued interest at any point in time will be greater than the
amount of interest actually received by a Trust and distributed to Unitholders.
If a Unitholder sells or redeems all or a portion of his Units, he will be
entitled to receive his proportionate share of the accrued interest from the
purchaser of his Units.

    UNIT DISTRIBUTION. Units will be distributed to the public by Underwriters,
broker-dealers and others at the Public Offering Price, plus accrued interest.
The Sponsor intends to qualify 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 for
any single transaction as described in the following table, provided that the
Units are acquired from the Sponsor.

<TABLE>
<CAPTION>
                                            IM-IT, U.S.
                                            TERRITORIAL
                                           IM-IT, LONG-                                              IM-IT                STATE
                              IM-IT      TERM STATE AND     IM-IT SHORT             IM-IT          LIMITED         INTERMEDIATE
                           DISCOUNT            NATIONAL    INTERMEDIATE      INTERMEDIATE         MATURITY             LADDERED
                              TRUST      QUALITY TRUSTS           TRUST             TRUST            TRUST       MATURITY TRUST
                        -----------      --------------    ------------       -----------      -----------       --------------
<S>                     <C>                 <C>             <C>               <C>              <C>               <C>           
  1 - 99 Units          $     18.00         $     30.00     $     10.00       $     25.00      $     27.00       $        20.00
  100 - 249 Units       $     19.00         $     32.00     $     11.00       $     28.00      $     30.00       $        21.00
  250 - 499 Units       $     20.00         $     34.00     $     11.00       $     27.00      $     30.00       $        21.00
  500 - 999 Units       $     20.00         $     35.00     $     12.00       $     30.00      $     32.00       $        23.00
  1,000 - 1,499 Units   $     20.00         $     34.00     $     12.00       $     29.00      $     29.00       $        22.00
  1,500 or more Units   $     20.00         $     34.00     $     12.00       $     29.00      $     29.00       $        22.00
</TABLE>

    The increased concession or agency commission is a result of the discount
given to purchasers for quantity purchases. See "Public Offering--General". In
addition to the concessions and agency commissions described in the table,
volume concessions or agency commissions of an additional $5.00 per Unit of an
IM-IT, a U.S. Territorial IM-IT, a Long-Term State or a National Quality Trust
and $2.00 per Unit of all other Trusts will be given to any broker/dealer or
agent (other than Underwriters) who purchases from the Sponsor at least 250
Units of such Trust during the initial offering period. These additional
concessions will be allowed at the time of purchase, provided, however, the
additional concession applicable to initial purchases totaling less than 250
Units will be paid retroactively at the end of the initial offering period. The
breakpoint concessions or agency commissions are also applied on a dollar basis
utilizing a breakpoint equivalent of $1,000 per Unit and will be applied on
whichever basis is more favorable to the distributor. The breakpoints will be
adjusted to take into consideration purchase orders stated in dollars which
cannot be completely fulfilled due to the requirement that only whole Units be
issued. Certain commercial banks may be making Units 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. Any discount provided to investors will be borne by the
selling dealer or agent. For secondary market transactions, the concession or
agency commission will amount to 70% of the applicable sales charge. 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.

    SPONSOR AND UNDERWRITER COMPENSATION. The Underwriters will receive a gross
sales commission equal to the sales charge applicable to the transaction
involved. "Public Offering--General". The Sponsor will receive from the
Underwriters the excess of this gross sales commission over the amounts set
forth in the following table, as of the Date of Deposit. For a list of the
Underwriters that have purchased Units from the Sponsor, see "Underwriting" in
Prospectus Part I.

<TABLE>
<CAPTION>
                                               IM-IT, U.S.
                                               TERRITORIAL
                                              IM-IT, LONG-                                           IM-IT                STATE
                              IM-IT         TERM STATE AND   IM-IT SHORT            IM-IT          LIMITED         INTERMEDIATE
                           DISCOUNT               NATIONAL  INTERMEDIATE     INTERMEDIATE         MATURITY             LADDERED
                              TRUST         QUALITY TRUSTS         TRUST            TRUST            TRUST       MATURITY TRUST
                        -----------         --------------  ------------      -----------      -----------       --------------
<S>                     <C>                 <C>             <C>               <C>              <C>               <C>           
  1 - 99 Units          $     20.00         $     35.00     $     12.00       $     27.00      $     29.00       $        22.00
  100 - 249 Units       $     21.00         $     37.00     $     13.00       $     30.00      $     32.00       $        23.00
  250 - 499 Units       $     22.00         $     39.00     $     13.50       $     29.50      $     32.00       $        23.00
  500 - 999 Units       $     22.00         $     40.00     $     14.00       $     32.50      $     34.50       $        25.00
  1,000 - 1,499 Units   $     22.00         $     39.00     $     14.00       $     31.00      $     31.00       $        24.00
  1,500 or more Units   $     22.00         $     39.00     $     14.00       $     31.00      $     31.00       $        24.00
</TABLE>

    A. G. Edwards & Sons, Inc. which acts as a Managing Underwriter of Units of
the various series of the IM-IT or National Quality Trust, 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 or National Quality Trust it underwrites. In
addition, the Sponsor will receive from the Managing Underwriters of any
National Quality, (who underwrite 15% of the Trust involved or 1,000 Units of
such Trust, whichever is greater) the excess of such gross sales commission over
$38.00 per Unit of any such Trust, as of the Date of Deposit. Also, any such
Managing Underwriter that sells a total of 25% or 1,500 Units, whichever is
greater, of any individual series of such Trusts will receive an additional
$2.00 per each such Unit. 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 Units, whichever is greater, of any Pennsylvania
IM-IT Trust will receive an additional $2.00 per each such Unit. In addition,
the Sponsor has entered into agreements with Advest, Inc. ("Advest") and Gruntal
& Co., Inc. ("Gruntal") whereby Advest and Gruntal will receive an additional
$2.00 per Unit in connection with a minimum commitment of 1,500 Units of any New
York IM-IT Trust. In addition, the Sponsor and J. J. B. Hilliard, W. L. Lyons,
Inc. ("Hilliard, Lyons") have entered into an agreement under which Hilliard,
Lyons may receive an additional $2.00 for each Unit of the Kentucky Quality
Trust which it underwrites, provided it underwrites a minimum of 400 Units of
such Trust. 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. The breakpoints listed herein will also be applied on a
dollar basis utilizing a breakpoint equivalent of $1,000 per Unit and will be
applied on whichever basis is more favorable to the Underwriter.

    In addition, the Sponsor and certain Underwriters will realize a profit or
loss, as a result of the difference between the price paid for the Bonds by the
Sponsor and the cost of the Bonds to a Trust. See "Portfolio" and "Notes to
Portfolio" in Prospectus Part I. Underwriters may also realize profits or losses
with respect to Bonds which were acquired by the Sponsor from underwriting
syndicates of which they were members. The Sponsor has not participated as sole
underwriter or as manager or as a member of the underwriting syndicates from
which the Bonds in the Trusts were acquired. Underwriters may further realize
profit or loss during the initial offering period as a result of possible
fluctuations in the market value of the Bonds 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. In addition to any other benefits Underwriters may realize
from the sale of Units, the Sponsor will share on a pro rata basis among senior
Underwriters (those who underwrite at least 250 Units) 50% of any gain (less
deductions for accrued interest and certain costs) represented by the difference
between the cost of the Bonds to the Sponsor and the evaluation of the Bonds on
the Date of Deposit. The Sponsor and certain of the other Underwriters will also
realize profits or losses in the amount of any difference between the price at
which Units are purchased and the price at which Units are resold in connection
with maintaining a secondary market for Units and will also realize profits or
losses resulting from a redemption of repurchased Units at a price above or
below the purchase price.

    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 such firms may be eligible to win
other nominal awards for certain sales efforts, or under which the Sponsor will
reallow to any such firms 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 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 firms 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.

    MARKET FOR UNITS. Although not obligated to do so, the Sponsor intends to,
and certain of the other Underwriters may, maintain a market for Units and offer
to purchase Units at prices, subject to change at any time, based upon the
aggregate bid prices of the Bonds plus accrued interest and 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 these prices. If a market is not maintained
and the Unitholder cannot find another purchaser, a Unitholder will be able to
dispose of Units by tendering them to the Trustee for redemption at the
Redemption Price. See "Rights of Unitholders--Redemption of Units". 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 any price in excess of
the Redemption Price and, if so, the amount thereof. The Trustee will 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 the Units not later than the day on which the Units would
otherwise have been redeemed by the Trustee.

RIGHTS OF UNITHOLDERS
- --------------------------------------------------------------------------------

    DISTRIBUTIONS OF INTEREST AND PRINCIPAL. Interest received by a Trust, pro
rated on an annual basis, will be distributed monthly unless a Unitholder elects
to receive semi-annual distributions. The amount and time of the first
distribution is described in Prospectus Part I under "Summary of Essential
Financial Information". The plan of distribution selected by a Unitholder will
remain in effect until changed. Unitholders who purchase Units in the secondary
market will receive distributions in accordance with the election of the prior
owner. Unitholders may change their distribution plan by indicating the change
on a card which may be obtained from the Trustee and return the card to the
Trustee with their certificates and other documentation required by the Trustee.
Certificates should be sent by registered or certified mail to avoid their being
lost or stolen. If the card and certificate are properly presented to the
Trustee, the change will become effective on the first day after the next
semi-annual record date and will remain effective until changed.

    Interest received by a Trust, including that part of the proceeds of any
disposition of Bonds which represents accrued interest, is credited by the
Trustee to the Interest Account. Other receipts are credited to the Principal
Account. 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, interest received will be distributed on
each distribution date to Unitholders of record as of the preceding record date.
All distributions will be net of estimated expenses. Funds in the Principal
Account will be distributed on each semi-annual distribution date to Unitholders
of record as of the preceding semi-annual record date. The Trustee is not
required to pay interest on funds held in the Principal or Interest Account (but
may itself earn interest thereon and therefore benefits from the use of these
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. However,
should the amount available for distribution in the Principal Account equal or
exceed $10.00 per Unit, the Trustee will make a special distribution from the
Principal Account on the next monthly distribution date to Unitholders of record
on the related monthly record date.

    Because interest payments are not received by a Trust at a constant rate
throughout the year, interest distributions may be more or less than the amount
credited to the Interest Account as of the record date. For the purpose of
minimizing fluctuations in interest distributions, the Trustee is authorized to
advance amounts necessary to provide interest distributions of approximately
equal amounts. The Trustee is reimbursed for these advances from funds in the
Interest Account on the next 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, under the applicable plan of
distribution.

    REINVESTMENT OPTION. Unitholders may elect to have distributions on their
Units automatically reinvested in shares of certain Van Kampen American Capital
or Morgan Stanley mutual funds which are registered in the Unitholder's state of
residence (the "Reinvestment Funds"). Each Reinvestment Fund has investment
objectives that differ from those of the Trusts. The prospectus relating to each
Reinvestment Fund describes its investment policies and the procedures to follow
to begin reinvestment. A Unitholder may obtain a prospectus for the Reinvestment
Funds from Van Kampen American Capital Distributors, Inc. at One Parkview Plaza,
Oakbrook Terrace, Illinois 60181.

    After becoming a participant in a reinvestment plan, each Trust distribution
will automatically be applied on the applicable distribution date to purchase
shares of the applicable Reinvestment Fund at a net asset value computed on such
date. Unitholders with an existing Guaranteed Reinvestment Option (GRO) Program
account (whereby a sales charge is imposed on distribution reinvestments) may
transfer their existing account into a new GRO account which allows purchases of
Reinvestment Fund shares at net asset value. Confirmations of all reinvestments
will be mailed to the Unitholder by the Reinvestment Fund. A participant may
elect to terminate his or her reinvestment plan and receive future distributions
in cash by notifying the Trustee in writing at least five days before the next
distribution date. Each Reinvestment Fund, its sponsor and investment adviser
have the right to terminate its reinvestment plan at any time. Unitholders of
New York Trusts who are New York residents may elect to have distributions
reinvested in shares of First Investors New York Insured Tax Free Fund, Inc.
subject to a sales charge of $1.50 per $100 reinvested (paid to First Investors
Management Company, Inc.).

    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, such
as in connection with lost, stolen or destroyed certificates) and by payment of
applicable governmental charges, if any. Redemption of Units cannot occur until
certificates representing the Units or satisfactory indemnity have been received
by the Trustee. No later than seven calendar days following satisfactory tender,
the Unitholder will receive an amount for each Unit equal to the Redemption
Price per Unit next computed after receipt by the Trustee of the 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 the Evaluation Time
on days of trading on the New York Stock Exchange, the date of tender is the
next day on which that Exchange is open and the Units will be deemed to have
been tendered to the Trustee on that day for redemption at the Redemption Price.

    Under Internal Revenue Service regulations, the Trustee is required to
withhold a specified percentage of a Unit redemption if the Trustee has not
received the Unitholder's tax identification number as required by such
regulations. Any amount 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, the Unitholder should provide a tax identification number
to the Trustee in order to avoid this possible "back-up withholding".

    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 Bonds as
of the Evaluation Time on days of trading on the New York Stock Exchange on the
date any such determination is made. The Evaluator determines the Redemption
Price per Unit on days Units are tendered for redemption. The Redemption Price
per Unit is the pro rata share of each Unit on the basis of (i) the cash on hand
in the Trust or moneys in the process of being collected, (ii) the value of the
Bonds based on the bid prices of the Bonds, except for cases in which the value
of insurance has been included, (iii) accrued interest, less (a) amounts
representing taxes or other governmental charges and (b) the accrued Trust
expenses. The Evaluator may determine the value of the Bonds 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 the Bonds are in default in
payment of principal or interest or in significant risk of 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". Accrued
interest paid on redemption shall be withdrawn from the Interest Account or, if
the balance therein is insufficient, from the Principal Account. All other
amounts will be withdrawn from the Principal Account. Units so redeemed shall be
cancelled.

    The price at which Units may be redeemed could be less than the price paid
by the Unitholder and may be less than the par value of the Bonds represented by
the Units redeemed. The Trustee may sell Bonds to cover redemptions. When Bonds
are sold, the size and diversity of the Trust will be reduced. Sales may be
required at a time when Bonds 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 SEC determines that
trading on that Exchange is restricted or an emergency exists, as a result of
which disposal or evaluation of the Bonds is not reasonably practicable, or for
other periods as the SEC may by order permit. Under certain extreme
circumstances the Sponsor may apply to the SEC for an order permitting a full or
partial suspension of the right of Unitholders to redeem their Units.

    CERTIFICATES. Ownership of Units is evidenced by certificates unless a
Unitholder makes a written request to the Trustee that ownership be in book
entry form. Units are transferable by making a written request to the Trustee
and, in the case of Units in certificate form, by presentation and surrender of
the certificate to the Trustee properly endorsed or accompanied by a written
instrument or instruments of transfer. A Unitholder must sign the written
request, or certificate transfer instrument, exactly as his name appears on the
records of the Trustee and on the face of any certificate with the signature
guaranteed by a participant in the Securities Transfer Agents Medallion Program
("STAMP") or a signature guaranty program accepted by the Trustee. 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, the Trustee may
require a Unitholder to pay a reasonable fee for each certificate re-issued or
transferred and to pay any governmental charge that may be imposed in connection
with each 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.

    REPORTS PROVIDED. Unitholders will receive a statement of interest and other
receipts received for each distribution. For as long as the Sponsor deems it to
be in the best interest of Unitholders, the accounts of each Trust will be
audited annually by independent certified public accountants and the report of
the accountants will be furnished to Unitholders upon request. Within a
reasonable period of time after the end of each year, the Trustee will furnish
to each person who was a registered Unitholder during that year a statement
describing the interest and principal received on the Bonds, actual Trust
distributions, Trust expenses, a list of the Bonds and other Trust information.
Unitholders will be furnished the Evaluator's evaluations of the Bonds upon
request.

INSURANCE ON THE BONDS IN THE INSURED TRUSTS
- --------------------------------------------------------------------------------

    Insurance has been obtained guaranteeing prompt payment of interest and
principal, when due, in respect of the Bonds in each Insured Trust. An insurance
policy obtained by an Insured Trust, if any, is non-cancellable and will
continue in force so long as the Trust is in existence, the respective Portfolio
Insurer is still in business and the Bonds described in the policy continue to
be held by the Trust. Any portfolio insurance premium for an Insured Trust is
paid by the Trust on a monthly basis. The premium for any Preinsured Bond
insurance has been paid by the issuer, by a prior owner of the Bonds or the
Sponsor and any policy is non-cancellable and will continue in force so long as
the Bonds so insured are outstanding and the Preinsured Bond Insurer remains in
business. The Portfolio Insurers and the Preinsured Bond Insurers are described
in "Portfolio" and the notes thereto in Prospectus Part I. The Portfolio
Insurers are either AMBAC Assurance Corporation or Financial Guaranty Insurance
Company. More detailed information regarding insurance on the Bonds and the
Preinsured Bond and Portfolio Insurers is included in the Information
Supplement. See "Additional Information".

    The portfolio insurance obtained by an Insured Trust, if any, guarantees the
timely payment of principal and interest on the Bonds when they fall due. For
this purpose, "when due" generally means the stated payment or maturity date for
the payment of principal and interest. However, in the event (a) an issuer
defaults in the payment of principal or interest, (b) an issuer enters into a
bankruptcy proceeding or (c) the maturity of the Bond is accelerated, the
affected Portfolio Insurer has the option to pay the outstanding principal
amount of the Bond plus accrued interest to the date of payment and thereby
retire the Bond from the Trust prior to the Bond's stated maturity date. The
insurance does not guarantee the market value of the Bonds or the value of the
Units. The Trustee, upon the sale of a Bond covered under a portfolio insurance
policy has the right to obtain permanent insurance with respect to the Bond
(i.e., insurance to maturity of the Bond regardless of the identity of the
holder) (the "Permanent Insurance") upon the payment of a single predetermined
insurance premium and expenses from the proceeds of the sale of the Bond. It is
expected that the Trustee would exercise the right to obtain Permanent Insurance
only if upon exercise the Trust would receive net proceeds in excess of the sale
proceeds if the Bonds were sold on an uninsured basis.

    The following summary information relating to the listed insurance companies
has been obtained from publicly available information:

<TABLE>
<CAPTION>
                                                     FINANCIAL INFORMATION (IN MILLIONS OF DOLLARS)
                                                     ----------------------------------------------
                                                          ADMITTED              POLICYHOLDERS'
NAME                                                       ASSETS                  SURPLUS
- ---------------------------------------------------------------------------------------------------
<S>                                                       <C>                     <C>
AMBAC Assurance Corporation (at 6/30/97)                  $  2,736                $   1,548
Capital Markets Assurance Corporation (at 9/30/97)             351                      192
Financial Guaranty Insurance Company (at 9/30/97)            2,531                    1,247
Financial Security Assurance, Inc. (at 9/30/97)              1,404                      517
MBIA Insurance Corporation (at 9/30/97)                      5,100                    1,700
</TABLE>

    Because the Bonds are insured by Portfolio Insurers or 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 has
assigned to the Units of each Insured Trust its "AAA" investment rating. This
rating will be in effect for a period of thirteen months from the Date of
Deposit and will, unless renewed, terminate at the end of such period. See
"Description of Ratings" in the Information Supplement. This rating should not
be construed as an approval of the offering of the Units by Standard & Poor's or
as a guarantee of the market value of the Trust or of the Units.

    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. 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
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.

FUND ADMINISTRATION
- --------------------------------------------------------------------------------

    SPONSOR. Van Kampen American Capital Distributors, Inc., a Delaware
corporation, is the Sponsor of the Trust. The Sponsor is an indirect subsidiary
of VK/AC Holding, Inc. VK/AC Holding, Inc. is a wholly owned subsidiary of MSAM
Holdings II, Inc., which in turn is a wholly owned subsidiary of Morgan Stanley,
Dean Witter, Discover & Co. ("MSDWD").

    MSDWD is a global financial services firm with a market capitalization
of more than $21 billion, which was created by the merger of Morgan Stanley
Group Inc. with Dean Witter, Discover & Co. on May 31, 1997. MSDWD, together
with various of its directly and indirectly owned subsidiaries, is engaged in a
wide range of financial services through three primary businesses: securities,
asset management and credit services. These principal businesses include
securities underwriting, distribution and trading; merger, acquisition,
restructuring and other corporate finance advisory activities; merchant banking;
stock brokerage and research services; asset management; trading of futures,
options, foreign exchange commodities and swaps (involving foreign exchange,
commodities, indices and interest rates); real estate advice, financing and
investing; global custody, securities clearance services and securities lending;
and credit card services. As of June 2, 1997, MSDWD, together with its
affiliated investment advisory companies, had approximately $270 billion of
assets under management, supervision or fiduciary advice.

    Van Kampen American Capital Distributors, Inc. specializes in the
underwriting and distribution of unit investment trusts and mutual funds with
roots in money management dating back to 1926. The Sponsor is a member of the
National Association of Securities Dealers, Inc. and has offices at One Parkview
Plaza, Oakbrook Terrace, Illinois 60181, (630) 684-6000 and 2800 Post Oak
Boulevard, Houston, Texas 77056, (713) 993-0500. 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 November 30, 1996, the total
stockholders' equity of Van Kampen American Capital Distributors, Inc. was
$129,451,000 (unaudited). (This paragraph relates only to the Sponsor and not to
the Fund or to any other Series thereof. 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 March 31, 1997, the Sponsor and its Van Kampen American Capital
affiliates managed or supervised approximately $58.45 billion of investment
products, of which over $10.85 billion is invested in municipal bonds. The
Sponsor and its Van Kampen American Capital affiliates managed $47 billion of
assets, consisting of $29.23 billion for 59 open-end mutual funds (of which 46
are distributed by Van Kampen American Capital Distributors, Inc.) $13.4 billion
for 37 closed-end funds and $4.97 billion for 106 institutional accounts. The
Sponsor has also deposited approximately $26 billion of unit investment trusts.
All of Van Kampen American Capital's open-end funds, closed-ended funds and unit
investment trusts are professionally distributed by leading financial firms
nationwide. 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 Municipals Income Trust(R) or the IM-IT(R)
trust. The Sponsor also provides surveillance and evaluation services at cost
for approximately $13 billion of unit investment trust assets outstanding. Since
1976, the Sponsor has serviced over two million investor accounts, opened
through retail distribution firms.

    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 SEC, (ii) terminate the Trust Agreement and
liquidate the Fund as provided therein or (iii) continue to act as Trustee
without terminating the Trust Agreement.

    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 unit investment trust
division offices at 101 Barclay Street, New York, New York 10286, telephone
(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. Additional
information regarding the Trustee is set forth in the Information Supplement,
including the Trustee's qualifications and duties, its ability to resign, the
effect of a merger involving the Trustee and the Sponsor's ability to remove and
replace the Trustee. See "Additional Information".

    PORTFOLIO ADMINISTRATION. The Trusts are not managed funds and, except as
provided in the Trust Agreement, Bonds generally will not be sold or replaced.
The Sponsor may, however, direct that Bonds be sold in certain limited
situations to protect to the Trust based on advice from the Evaluator. These
situations may include default in interest or principal payments on the Bonds or
other obligations of an issuer, an advanced refunding or institution of certain
legal proceedings. In addition, the Trustee may sell Bonds designated by the
Evaluator for purposes of redeeming Units or payment of expenses. The Evaluator
will consider a variety of factors in designating Bonds to be sold including
interest rates, market value and marketability. Except in limited circumstances,
the Trustee must reject any offer by an issuer to issue bonds in exchange or
substitution for the Bonds (such as a refunding or refinancing plan). The
Trustee will promptly notify Unitholders of any exchange or substitution. The
Information Supplement contains a more detailed description of circumstances in
which Bonds may be sold or replaced. See "Additional Information".

    REPLACEMENT BONDS. No assurance can be given that a Trust will retain its
present size or composition because Bonds may be sold, redeemed or mature from
time to time and the proceeds will be distributed to Unitholders and will not be
reinvested. In the event of a failure to deliver any Bond that has been
purchased under a contract ("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 portfolio of a Trust. 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 must
be substantially identical to the Failed Bonds in terms of (i) the exemption
from federal and state taxation, (ii) maturity, (iii) yield to maturity and
current return, (iv) Standard & Poor's or Moody's ratings, and (v) insurance in
an Insured Trust. The Trustee shall notify all Unitholders of a Trust within
five days after the acquisition of a Replacement Bond and shall make a pro rata
distribution of the amount, if any, by which the cost of the Failed Bond
exceeded the cost of the Replacement Bond plus accrued interest. If Failed Bonds
are not replaced, the Sponsor will refund the sales charge attributable to the
Failed Bonds to all Unitholders of the Trust and distribute the principal and
accrued interest (at the coupon rate of the Failed Bonds to the date of removal
from the Trust) attributable to the Failed Bonds within 30 days after removal.
All interest paid to a Unitholder which accrued after the expected date of
settlement for Units will be paid by the Sponsor and accordingly will not be
treated as tax-exempt income. If Failed Bonds are not replaced, the Estimated
Net Annual Interest Income per Unit would be reduced and the Estimated Current
Return and Estimated Long-Term Return might be lowered. Unitholders may not be
able to reinvest their proceeds in other securities at a yield equal to or in
excess of the yield of the Failed Bonds.

    AMENDMENT OF TRUST AGREEMENT. The Sponsor and the Trustee may amend the
Trust Agreement without the consent of Unitholders to correct any provision
which may be defective or to make other provisions that will not adversely
affect the interest of the Unitholders (as determined in good faith by the
Sponsor and the Trustee). The Trust Agreement may not be amended to increase the
number of Units or to permit the acquisition of Bonds in addition to or in
substitution for any of the Bonds initially deposited in the Trust, except for
the substitution of certain refunding Bonds. The Trustee will notify Unitholders
of any amendment.

    TERMINATION OF TRUST AGREEMENT. A Trust will terminate upon the redemption,
sale or other disposition of the last Bond held in the Trust. A Trust may also
be terminated at any time by consent of Unitholders of 51% of the Units then
outstanding or by the Trustee when the value of the Trust is less than 20% of
the original principal amount of Bonds. The Trustee will notify each Unitholder
of any termination within a reasonable time and will then liquidate any
remaining Bonds. The sale of Bonds upon termination may result in a lower amount
than might otherwise be realized if sale were not required at that time. For
this reason, among others, the amount realized by a Unitholder upon termination
may be less than the principal amount of Bonds per Unit or value at the time of
purchase. The Trustee will distribute to each Unitholder his share of the
balance of the Interest and Principal Accounts after deduction of costs,
expenses or indemnities. The Unitholder will receive a final distribution
statement with this distribution. When the Trustee in its sole discretion
determines that any amounts held in reserve are no longer necessary, it will
distribute these amounts to Unitholders. The Information Supplement contains
further information regarding termination of a Trust. See "Additional
Information".

    LIMITATION ON LIABILITIES. The Sponsor, Evaluator and 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 (negligence in the case of the Trustee) 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
Bonds. 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 is not liable
for any taxes or governmental charges imposed on the Bonds, on it as Trustee
under the Trust Agreement or on 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 and Sponsor may rely on any evaluation furnished by the Evaluator and
have no responsibility for the accuracy thereof. Determinations by the Evaluator
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.

FEDERAL TAX STATUS
- --------------------------------------------------------------------------------

    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 were rendered by bond counsel to the respective issuing authorities. In
addition, with respect to State Trusts, where applicable, bond counsel to the
issuing authorities rendered opinions as to the exemption of interest on such
Bonds when held by residents of the State in which the issuers of such Bonds are
located from state income taxes and certain state or local intangibles and local
income taxes. Neither the Sponsor nor Chapman and Cutler have made any review of
the Trust proceedings relating to the issuance of the Bonds or of the basis of
such opinions. If the interest on a Bond should be determined to be taxable, the
Bond would generally have to be sold at a substantial discount. In addition,
investors could be required to pay income tax on interest received prior to the
date on which interest is determined to be taxable. Gain realized on the sale or
redemption of the Bonds by the Trustee or of a Unit by a Unitholder is
includible in gross income for Federal income tax purposes and may be includible
in gross income for state tax purposes. Such gain does not include any amounts
received in respect of accrued interest or accrued original issue discount, if
any. If a Bond is acquired with accrued interest, that portion of the price paid
for the accrued interest is added to the tax basis of the Bond. When this
accrued interest is received, it is treated as a return of capital and reduces
the tax basis of the Bond. If a Bond is purchased for a premium, the amount of
the premium is added to the tax basis of the Bond. Bond premium is amortized
over the remaining term of the Bond, and the tax basis of the Bond is reduced
each tax year by the amount of the premium amortized in that tax year. For
purposes of the following opinions, it is assumed that each asset of the Trust
is debt, the interest on which is excluded for Federal income tax purposes.

    In the opinion of Chapman and Cutler, counsel for the Sponsor, under
existing law as of the date of this Prospectus:

   (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 for Federal income tax
        purposes, when received by a Trust and when distributed to Unitholders;
        however such interest may be taken into account in computing 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
        each asset 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.
        If the Unitholder disposes of a Unit, he is deemed thereby to have
        disposed of his entire pro rata interest in all assets of the Trust
        involved including his pro rata portion of all the Bonds represented by
        a Unit. Legislative proposals have been made that would treat certain
        transactions designed to reduce or eliminate risk of loss and
        opportunities for gain as constructive sales for purposes of recognition
        of gain (but not loss). Unitholders should consult their own tax
        advisors with regard to any such constructive sale rules. 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 before the date the Trust acquired
        ownership of the Bonds (and the amount of this reduction may exceed the
        amount of accrued interest paid to the seller) 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 (subject to
        various non-recognition provisions of the Code). 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
        accrued 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 valuation date nearest the
        date of acquisition of the Units. It should be noted that certain
        legislative proposals have been made which could affect the calculation
        of basis for Unitholders holding securities that are substantially
        identical to the Bonds. Unitholders should consult their own tax
        advisors with regard to the calculation of basis. The tax basis
        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 less than or 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 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 in the normal
        course by the issuer of the defaulted obligations provided that, at the
        time such policies are purchased, the amounts paid for such policies are
        reasonable, customary and consistent with the reasonable expectation
        that the issuer of the obligations, rather than the insurer, will pay
        debt service on the obligations; and

   (4)  Any proceeds paid under individual policies obtained by issuers of Bonds
        which represent maturing interest on defaulted Bonds 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 Bonds provided that, at the time
        such policies are purchased, the amounts paid for such policies are
        reasonable, customary and consistent with the reasonable expectation
        that the issuer of the Bonds, rather than the insurer, will pay debt
        service on the Bonds.

    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 would have
previously accrued based upon its issue price (its "adjusted issue price") to
prior owners. If a Bond is acquired with accrued interest, that portion of the
price paid for the accrued interest is added to the tax basis of the Bond. When
this accrued interest is received, it is treated as a return of capital and
reduces the tax basis of the Bond. If a Bond is purchased for a premium, the
amount of the premium is added to the tax basis of the Bond. Bond premium is
amortized over the remaining term of the Bond, and the tax basis of the Bond is
reduced each tax year by the amount of the premium amortized in that tax year.
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. Unitholders should consult with their tax advisers regarding
these rules and their application.

         "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), subject to a statutory
de minimis rule. 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. Under current Code provisions, the Superfund Tax does not apply to tax
years beginning on or after January 1, 1996. Legislative proposals have been
introduced which would extend the Superfund Tax. Under the provisions of Section
884 of the Code, a branch profits tax is levied on the "effectively connected
earnings and profits" of certain foreign corporations which include tax-exempt
interest such as interest on the Bonds in the Trust. Unitholders should 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. Legislative proposals
have been made that would extend the financial institution rules to all
corporations. Investors with questions regarding these issues should consult
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 the Code and 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 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.

    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 (which are defined as net long-term capital gain
over net short-term capital loss for a taxable year) 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. For purposes of
computing the alternative minimum tax for individuals and corporations and the
Superfund Tax for corporations, interest on certain private activity bonds
(which includes most industrial and housing revenue bonds) issued on or after
August 8, 1996 is included as an item of tax preference. Except as otherwise
noted in Prospectus Part I, the Trusts do not include any such private activity
bonds issued on or after that date.

    Section 86 of the Code 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.

    Ownership of the Units may result in collateral federal income tax
consequences to certain taxpayers, including, without limitation, corporations
subject to either the environmental tax or the branch profits tax, financial
institutions, certain insurance companies, certain S corporations, individual
recipients of Social Security or Railroad Retirement benefits and taxpayers who
may be deemed to have incurred (or continued) indebtedness to purchase or carry
tax-exempt obligations. Prospective investors should consult their tax advisors
as to the applicability of any collateral consequences.

    For a discussion of the state tax status of income earned on Units of a
Trust and recent changes in Federal tax law, see Prospectus Part I. 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.

EXPENSES
- -------------------------------------------------------------------------------

    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 American Capital Investment Advisory Corp., which is an
affiliate of the Sponsor, will receive the annual supervisory fee indicated
under "Summary of Essential Financial Information" in Prospectus Part I for
providing portfolio supervisory services for the Fund. In addition, the
Evaluator will receive the annual evaluation fee indicated under "Summary of
Essential Financial Information" in Prospectus Part I for evaluating each
Trust's portfolio. These fees may exceed the actual costs of providing these
services for a Trust but the total amount received by the Evaluator for
providing these services to all Van Kampen American Capital unit investment
trusts will not exceed the total cost of providing the services in any calendar
year. For its services the Trustee will receive the fee indicated under "Summary
of Essential Financial Information" in Prospectus Part I (which may be reduced
as described therein). Part of the Trustee's compensation for its services is
expected to result from the use of the funds being held in the Principal and
Interest Accounts for future distributions, payment of expenses and redemptions
since these Accounts are non-interest bearing to Unitholders. These fees are
based on the outstanding principal amount of Bonds and Units on the Date of
Deposit for the first year and as of the close of business on January 1 for each
year thereafter.

    Premiums for any portfolio insurance are obligations of each Insured
Trust and are payable monthly by the Trustee on behalf of the Trust. As Bonds in
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. 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 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, (g)
expenditures incurred in contacting Unitholders upon termination of the Trusts
and (h) costs incurred to reimburse the Trustee for advancing funds to the
Trusts to meet scheduled distributions (which costs may be adjusted periodically
in response to fluctuations in short-term interest rates). 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 of
the applicable Trust. If the balances in the Interest and Principal Accounts are
insufficient to provide for amounts payable by a Trust, the Trustee has the
power to sell Bonds to pay such amounts.

    On or before the twenty-fifth 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.
The Trustee also may withdraw from these 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. 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.

ADDITIONAL INFORMATION
- -------------------------------------------------------------------------------

    This Prospectus does not contain all the information set forth in the
Registration Statement filed by the Fund with the SEC. The Information
Supplement, which has been filed with the SEC, includes more detailed
information concerning the Bonds, investment risks and general information about
the Fund. This Prospectus incorporates by reference the entire Information
Supplement. The Information Supplement may be obtained by contacting the Trustee
or is available along with other related materials at the SEC's Internet site
(http://www.sec.gov).

OTHER MATTERS
- -------------------------------------------------------------------------------

    LEGAL MATTERS. The legality of the Units offered hereby and certain matters
relating to Federal tax law have been passed upon by Chapman and Cutler, 111
West Monroe Street, Chicago, Illinois 60603, as counsel for the Sponsor. Winston
& Strawn has acted as counsel to the Trustee and Special counsel to the Fund for
New York tax matters. Special counsel to the Fund for certain state tax matters
are named under "Tax Status" appearing in Prospectus Part I.

    INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS. The statement of condition and the
related portfolio at the Date of Deposit included in Prospectus Part I have been
audited by Grant Thornton LLP, independent certified public accountants, as set
forth in their report in Prospectus Part I, and are included herein in reliance
upon the authority of said firm as experts in accounting and auditing.

                                TABLE OF CONTENTS
                  TITLE                                    PAGE
          The Trusts                                         2
             The Fund                                        2
             Objectives and Bond Selection                   2
             Risk Factors                                    3
          Estimated Current and Long-Term Returns            5
          Public Offering                                    6
             General                                         6
             Offering Price                                  7
             Accrued Interest                                8
             Unit Distribution                               8
             Sponsor and Underwriter Compensation            9
             Market for Units                               10
          Rights of Unitholders                             11
             Distributions of Interest and Principal        11
             Reinvestment Option                            11
             Redemption of Units                            11
             Certificates                                   12
             Reports Provided                               12
          Insurance on the Bonds in the Insured Trusts      13
          Fund Administration                               14
             Sponsor                                        14
             Trustee                                        14
             Portfolio Administration                       14
             Replacement Bonds                              15
             Amendment of Trust Agreement                   15
             Termination of Trust Agreement                 15
             Limitation on Liabilities                      15
          Federal Tax Status                                16
          Expenses                                          18
          Additional Information                            19
          Other Matters                                     19
             Legal Matters                                  19
             Independent Certified Public Accountants       19

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   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.

   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.

                               PROSPECTUS PART II

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

                                  FEBRUARY 1998

              INSURED MUNICIPALS INCOME TRUST, INSURED MULTI-SERIES

                                       AND

                         INSURED MUNICIPALS INCOME TRUST
             AND INVESTORS' QUALITY TAX-EXEMPT TRUST, MULTI-SERIES

          ------ A Wealth of Knowledge o Knowledge of Wealth(sm) ------
                           VAN KAMPEN AMERICAN CAPITAL

                               One Parkview Plaza
                        Oakbrook Terrace, Illinois 60181

                             2800 Post Oak Boulevard
                              Houston, Texas 77056


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