NUVEEN TAX EXEMPT UNIT TRUST SERIES 822
S-6EL24, 1995-08-24
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<PAGE>
                                                      40 ACT FILE NO. 811-2271


                       SECURITIES AND EXCHANGE COMMISSION

                                Washington, D.C.  20549

                                    FORM S-6

For Registration under the Securities Act of 1933 of Securities of Unit
Investment Trusts Registered on Form N-8B-2.

A.  Exact Name of Trust:     NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 822

B.  Name of Depositor:       JOHN NUVEEN & CO. INCORPORATED

C.  Complete address of Depositor's principal executive offices:

                             333 West Wacker Drive
                            Chicago, Illinois  60606

D.  Name and complete address of agents for service:

                         JOHN NUVEEN & CO. INCORPORATED
                            Attn:  James J. Wesolowski
                             333 West Wacker Drive
                            Chicago, Illinois  60606


                                CHAPMAN AND CUTLER
                           Attn:  Eric F. Fess
                             111 West Monroe Street
                            Chicago, Illinois  60603

It is proposed that this filing will become effective (check appropriate box)

_____
_____  immediately upon filing pursuant to paragraph (b)

_____
_____  on (date) pursuant to paragraph (b) of rule 485

_____
_____  60 days after filing pursuant to paragraph (a)

_____
_____  on (date) pursuant to paragraph (a) of rule (485 or 486)

E.  Title and amount of securities being registered:  An indefinite number of
Units pursuant to Rule 24f-2 promulgated under the Investment Company Act of
1940, as amended.

F.  Proposed maximum offering price to the public of the securities being
registered:  Indefinite

G.  Amount of filing fee:  $500 (as required by Rule 24f-2)

H.  Approximate date of proposed sale to the public:

                  As soon as practicable after the effective
                      date of the registration statement

-----       Check box if it is proposed that this filing will become effective
-----       on (Date) at (Time) pursuant to Rule 487.


______________________________________________________________________________

    The registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the registrant 
shall file a further amendment which specifically states that this 
Registration Statement shall thereafter become effective in accordance with 
Section 8(a) of the Securities Act of 1933 or until the Registration 
Statement  shall become effective on such date as the Commission, acting 
pursuant to said  Section 8(a) may determine.



<PAGE>
   
                                AUGUST 23, 1995
                             SUBJECT TO COMPLETION
 
NUVEEN  Tax-Exempt Unit Trusts
             PROSPECTUS
            Series 820
             August 23, 1995
    
INTEREST  INCOME TO THE  TRUSTS AND TO  UNITHOLDERS, IN THE  OPINION OF COUNSEL,
UNDER EXISTING LAW IS EXEMPT FROM FEDERAL INCOME TAX. CAPITAL GAINS, IF ANY, ARE
SUBJECT TO TAX. IN ADDITION, INTEREST INCOME OF STATE TRUSTS IS, IN THE  OPINION
OF  COUNSEL,  EXEMPT,  TO THE  EXTENT  INDICATED,  FROM STATE  AND  LOCAL TAXES.
INTEREST INCOME OF ANY TRUST  OTHER THAN A STATE TRUST  MAY BE SUBJECT TO  STATE
AND LOCAL TAXES.
 
CURRENTLY  OFFERED AT PUBLIC OFFERING PRICE PLUS INTEREST ACCRUED TO THE DATE OF
SETTLEMENT. MINIMUM PURCHASE--EITHER $5,000 OR 50 UNITS, WHICHEVER IS LESS.
 
   
THE NUVEEN  TAX-EXEMPT  UNIT  TRUST,  SERIES 820  consists  of  four  underlying
separate  unit investment trusts designated as California Insured Trust 253, New
Jersey Insured Trust 196,  New York Insured Trust  240 and Pennsylvania  Insured
Trust  201. Each  Trust initially  consists of  delivery statements  relating to
contracts to  purchase Bonds  and,  thereafter, will  consist of  a  diversified
portfolio of obligations issued by or on behalf of states and territories of the
United  States and authorities and political subdivisions thereof (see SCHEDULES
OF INVESTMENTS), the interest on which is, in the opinion of bond counsel to the
issuers, exempt from  Federal income tax  under existing law.  In addition,  the
interest  on Bonds in each State Trust is, in the opinion of bond counsel to the
issuers of the obligations, exempt from  such State's income taxes, if any.  All
obligations in each Traditional Trust are rated in the category "A" or better by
Standard & Poor's, a Division of the McGraw-Hill Companies ("Standard & Poor's")
or  Moody's  Investors Service,  Inc. ("Moody's")  on the  Date of  Deposit. All
obligations in each Insured Trust are covered by policies of insurance  obtained
from  the  MBIA  Insurance  Corporation guaranteeing  payment  of  principal and
interest when due. All  such policies of insurance  remain effective so long  as
the  obligations are outstanding.  As a result  of such insurance,  the Bonds in
each portfolio of the Insured Trusts have received a rating of "Aaa" by  Moody's
and  the Bonds  in the  Insured Trusts  and the  Units of  each such  Trust have
received a rating of "AAA" by Standard  & Poor's. INSURANCE RELATES ONLY TO  THE
BONDS  IN THE  INSURED TRUSTS AND  NOT TO THE  UNITS OFFERED HEREBY  OR TO THEIR
MARKET VALUE. (See Section 5.)
    
 
THE OBJECTIVES of the Trusts are  tax-exempt income and conservation of  capital
through  a diversified  investment in tax-exempt  Bonds. (SEE SECTIONS  2, 3 AND
11.) The payment of interest and  the preservation of principal are, of  course,
dependent upon the continuing ability of the issuers of Bonds and of any insurer
thereof  to meet  their obligations thereunder.  There is no  guarantee that the
Trusts' objectives will be achieved. (SEE PAGE A-1.)
 
DISTRIBUTIONS of  interest received  by each  Trust will  be made  semi-annually
unless  the Unitholder elects to receive them monthly or quarterly. (SEE SECTION
13.) Distribution of funds in the Principal Account, if any, will ordinarily  be
made semi-annually.
 
FOR  ESTIMATED LONG TERM RETURNS AND ESTIMATED CURRENT RETURNS to Unitholders in
each Trust on the  business day prior to  the Date of Deposit.  (SEE PAGE 3  AND
SECTION 9.)
 
THE  PUBLIC OFFERING PRICE  per Unit of  each Trust during  the initial offering
period is equal to a pro rata share of the OFFERING prices of the Bonds in  such
Trust's  portfolio plus  a sales charge  of up  to 4.90% of  the Public Offering
Price (equivalent to  5.152% of the  net amount invested);  the sales charge  is
somewhat  lower on Trusts  with lesser average maturities.  (SEE SECTION 6.) The
Secondary Market Public Offering Price per Unit for each Trust will be equal  to
a  pro rata share of the  sum of BID prices of the  Bonds in such Trust plus the
sales charges determined based on the number of years remaining to the  maturity
of  each  Bond. Accrued  interest from  the  preceding Record  Date to,  but not
including, the settlement date (normally three business days after purchase)  is
added  to the Public Offering Price. The  sales charge is reduced on a graduated
scale for sales involving at least $50,000  or 500 Units and will be applied  on
whichever basis is more favorable to the purchaser. (SEE SECTION 6.)
 
A  UNITHOLDER MAY REDEEM UNITS at the office of the Trustee, United States Trust
Company of New York, at prices based upon the BID prices of the Bonds. The price
received  upon  redemption  may  be  more  or  less  than  the  amount  paid  by
Unitholders,  depending upon the  value of the  Bonds on the  date of tender for
redemption. (SEE  SECTION 19.)  The Sponsor,  although not  required to  do  so,
intends  to make a secondary market for the  Units of the Trusts at prices based
upon the BID  prices of the  Bonds in  the respective Trusts.  (SEE SECTION  7.)
RETAIN THIS PROSPECTUS FOR FUTURE REFERENCE.
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
THESE  SECURITIES HAVE  NOT BEEN APPROVED  OR DISAPPROVED BY  THE SECURITIES AND
EXCHANGE COMMISSION OR ANY  STATE SECURITIES COMMISSION  NOR HAS THE  SECURITIES
AND  EXCHANGE  COMMISSION OR  ANY STATE  SECURITIES  COMMISSION PASSED  UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
<PAGE>
  NUVEEN  Tax-Exempt Unit Trusts
 
   
<TABLE>
<CAPTION>
      INDEX                                             SECTION         PAGE
<C>   <S>                                              <C>        <C>
      SPECIFIC TRUST MATTERS
      California Insured Trust 253                            3         8-21
      New Jersey Insured Trust 196                            3        22-29
      New York Insured Trust 240                              3        30-43
      Pennsylvania Insured Trust 201                          3        44-53
      GENERAL MATTERS
      Accrued Interest                                        8         A-17
      Accumulation Plan                                      14         A-25
      Bonds, How Selected                                     3            7
      Bonds, Initial Determination of Offering Price         10         A-19
      Bonds, Limited Right of Substitution                    4          A-7
      Bond Ratings                                            3         8-53
      Bonds, Removal from Trust                              21         A-34
      Call Provisions of Portfolio Bonds                   3, 4     8-53,A-8
      Capital Gains Taxability                               11         A-20
      Dealer Discount                                        17         A-29
      Description of Units of Trust                           1            5
      Distributions to Unitholders                           13         A-24
      Distribution Payment Dates                          3, 13   8-53, A-24
      Distribution of Units to the Public                    17         A-29
      Essential Information Regarding the Trusts             --            4
      Estimated Long Term Return and Estimated Current
      Return                                                  9      3, A-18
      Evaluation                                             16         A-29
      Expenses to Fund                                       12         A-23
      Insurance on Bonds in the Insured Trusts                5         A-10
      Insurance on Certain Bonds in the Traditional
      Trusts                                                  5         A-12
      Interest Income to Trust                                3         8-53
      Investments, Schedules of                               3         8-53
      Legality of Units                                      24         A-38
      Limitations on Liabilities of Sponsor and Trustee       22        A-35
      Market for Units                                        7         A-17
      Minimum Transaction                                    17         A-29
      Objectives of the Trusts                                2            6
      Optional Distribution Plan                             13         A-24
      Other Information                                      24         A-37
      Ownership and Transfer of Units                        18         A-31
      Public Offering Price of Units                          6         A-13
      Quantity Purchases                                      6         A-13
      Record Dates                                           13         A-24
      Ratings, Description of                                24         A-39
      Redemption of Units by Trustee                         19    A-32,A-34
      Report of Independent Public Accountants                3           55
      Reports to Unitholders                                 15         A-28
      Repurchase of Units by Sponsor                         20         A-33
      Risk Factors                                            3          A-1
      Sales Charge                                            6         A-13
      Sponsor, Information About                             23         A-36
      State Tax Status                                        3         8-53
      Statements of Condition                                 3           56
      Successor Trustees and Sponsors                        22         A-35
      Tax Status of Unitholders                              11         A-20
      Trustee, Information About                             22         A-35
      Trust Indenture, Amendment and Termination             24         A-37
      Unit Value                                             16         A-29
</TABLE>
    
 
                  2
<PAGE>
                          ESTIMATED LONG TERM RETURNS
                                      AND
                    ESTIMATED CURRENT RETURNS FOR THE TRUSTS
 
Following  are the  Estimated Long Term  and Estimated Current  Returns for each
Trust on the  business day  prior to  the Date  of Deposit,  under the  monthly,
quarterly and semi-annual plans of distribution (SEE SECTION 3):
 
                          ESTIMATED LONG TERM RETURNS
 
   
<TABLE>
<CAPTION>
                                                          PLAN OF DISTRIBUTION
                                                ----------------------------------------
                    TRUST                       MONTHLY      QUARTERLY      SEMI-ANNUAL
  <S>                                           <C>          <C>            <C>
  --------------------------------------------------------------------------------------
  California Insured Trust 253.............      5.68%         5.71%           5.73%
  New Jersey Insured Trust 196.............      5.52%         5.54%           5.56%
  New York Insured Trust 240...............      5.62%         5.65%           5.67%
  Pennsylvania Insured Trust 201...........      5.57%         5.61%           5.63%
</TABLE>
    
 
                           ESTIMATED CURRENT RETURNS
 
   
<TABLE>
<CAPTION>
                                                          PLAN OF DISTRIBUTION
                                                ----------------------------------------
                    TRUST                       MONTHLY      QUARTERLY      SEMI-ANNUAL
  <S>                                           <C>          <C>            <C>
  --------------------------------------------------------------------------------------
  California Insured Trust 253.............      5.59%         5.63%           5.64%
  New Jersey Insured Trust 196.............      5.42%         5.45%           5.47%
  New York Insured Trust 240...............      5.54%         5.58%           5.59%
  Pennsylvania Insured Trust 201...........      5.47%         5.50%           5.52%
</TABLE>
    
 
    The  Estimated Long Term Return for each Trust is a measure of the return to
the investor earned  over the estimated  life of the  Trust. The Estimated  Long
Term  Return represents an  average of the  yields to maturity  (or call) of the
Bonds in  the Trust's  portfolio  calculated in  accordance with  accepted  bond
practice and adjusted to reflect expenses and sales charges. Under accepted bond
practice,  tax-exempt bonds  are customarily  offered to  investors on  a "yield
price" basis, which involves computation of  yield to maturity or to an  earlier
call date (whichever produces the lower yield), and which takes into account not
only the interest payable on the bonds but also the amortization or accretion to
a  specified date of any premium over  or discount from the par (maturity) value
in the bond's  purchase price. In  calculating Estimated Long  Term Return,  the
average  yield for  the Trust's  portfolio is  derived by  weighting each Bond's
yield by the market value of the Bond and by the amount of time remaining to the
date to which the Bond is priced. Once the average portfolio yield is  computed,
this  figure is then reduced to reflect estimated expenses and the effect of the
maximum sales  charge paid  by investors.  The Estimated  Long Term  Return  and
Estimated  Current Return calculations do not take  into account the effect of a
first distribution which may be less than a regular distribution or may be  paid
at  some point after 30 days (or a  second distribution which may be less than a
normal distribution for Unitholders who choose quarterly or semi-annual plans of
distribution), and it also does not  take into account the difference in  timing
of  payments  to  Unitholders  who  choose  quarterly  or  semi-annual  plans of
distribution, each of which will reduce the return.
 
    Estimated Current Return  is computed  by dividing the  Net Annual  Interest
Income per Unit by the Public Offering Price. In contrast to Estimated Long Term
Return, Estimated Current Return does not reflect the amortization of premium or
accretion of discount, if any, on the Bonds in the Trust's portfolio. Net Annual
Interest Income per Unit is calculated by dividing the annual interest income to
the Trust, less estimated expenses, by the number of Units outstanding.
 
    Net  Annual Interest  Income per Unit,  used to  calculate Estimated Current
Return, will vary  with changes  in fees  and expenses  of the  Trustee and  the
Evaluator  and with the redemption, maturity, exchange or sale of Bonds. A Trust
may experience expenses and  portfolio changes different  from those assumed  in
the  calculation of Estimated Long  Term Return. There thus  can be no assurance
that the Estimated  Current Returns or  the Estimated Long  Term Returns  quoted
herein will be realized in the future. Both the Estimated Current Return and the
Estimated  Long Term Return quoted  herein are based on  the market value of the
underlying Bonds on the  business day prior to  the Date of Deposit;  subsequent
calculations  of these performance measures will reflect the then current market
value of the underlying Bonds and may be higher or lower. For more  information,
see Section 9. The Sponsor will provide estimated cash flow information relating
to  a Trust without  charge to each  potential investor in  a Trust who receives
this prospectus and makes  an oral or  written request to  the Sponsor for  such
information.
 
                                       3
<PAGE>
   
                 ESSENTIAL INFORMATION REGARDING THE TRUSTS ON
                                AUGUST 22, 1995+
    
           Sponsor and Evaluator...... John Nuveen & Co. Incorporated
           Trustee........... United States Trust Company of New York
                  -------------------------------------------
 
The  income, expense and distribution data  set forth below have been calculated
for  Unitholders   receiving   MONTHLY   distributions.   Unitholders   choosing
distributions  quarterly or  semi-annually will receive  slightly higher returns
because of the lower Trustee's fees and expenses under such plans. (SEE  SECTION
3 FOR DATA RELATING TO THESE PLANS.)
 
   
<TABLE>
<CAPTION>
                                                        CALIFORNIA          NEW JERSEY           NEW YORK          PENNSYLVANIA
                                                          INSURED             INSURED             INSURED             INSURED
                                                         TRUST 253           TRUST 196           TRUST 240           TRUST 201
<S>                                                   <C>                 <C>                 <C>                 <C>
                                                      ---------------     ---------------     ---------------     ---------------
Principal Amount of Bonds in Trust..................  $    5,000,000      $    3,500,000      $    5,000,000      $    3,500,000
Number of Units.....................................          50,000              35,000              50,000              35,000
Fractional Undivided Interest in Trust Per Unit.....        1/50,000            1/35,000            1/50,000            1/35,000
Public Offering Price--Less than 500 Units
    Aggregate Offering Price of Bonds in Trust......  $    4,766,719      $    3,311,580      $    4,764,317      $    3,303,415
    Divided by Number of Units......................  $        95.33      $        94.62      $        95.29      $        94.38
    Plus Sales Charge*..............................  $         4.91      $         4.87      $         4.91      $         4.86
    Public Offering Price Per Unit(1)...............  $       100.24      $        99.49      $       100.20      $        99.24
Redemption Price Per Unit (exclusive of accrued
  interest).........................................  $        94.83      $        94.12      $        94.81      $        93.90
Sponsor's Initial Repurchase Price Per Unit
  (exclusive of accrued interest)...................  $        95.33      $        94.62      $        95.29      $        94.38
Excess of Public Offering Price Per Unit over
  Redemption Price Per Unit.........................  $         5.41      $         5.37      $         5.39      $         5.34
Excess of Public Offering Price Per Unit over
  Sponsor's Repurchase Price Per Unit...............  $         4.91      $         4.87      $         4.91      $         4.86
Calculation of Estimated Net Annual Interest Income
  Per Unit
    Annual Interest Income(2).......................  $       5.8535      $       5.6357      $       5.7998      $       5.6750
    Less Estimated Annual Expense...................  $        .2461      $        .2444      $        .2447      $        .2442
                                                      ---------------     ---------------     ---------------     ---------------
    Estimated Net Annual Interest Income(3).........  $       5.6074      $       5.3913      $       5.5551      $       5.4308
Daily Rate of Accrual Per Unit......................  $       .01557      $       .01497      $       .01543      $       .01508
Estimated Current Return(4).........................           5.59%               5.42%               5.54%               5.47%
Estimated Long Term Return(4).......................           5.68%               5.52%               5.62%               5.57%
Estimated Annual Organizational Expenses Per
  Unit(5)...........................................  $       .02880      $       .02971      $       .03120      $       .02914
 
<FN>
----------
Evaluations  for purpose of sale,  purchase or redemption of  Units are made as of  4 p.m. Eastern time  on the business day next
following receipt of an order by the Sponsor or Trustee. (See Section 6.)
 + The business day prior to the Date of Deposit.
 * National and State, 5.152%;  Long Intermediate, 4.439%; Intermediate, 4.058%;  Short Intermediate, 3.093%; Short Term,  2.564%
   (4.9%, 4.25%, 3.9%, 3.0% and 2.5% of the Public Offering Prices, respectively.)
(1)  Units are offered at the Public  Offering Price plus accrued interest from the  preceding Record Date to, but not including,
    the date of settlement (normally three business days after purchase). The Date of Deposit of the Fund has been designated  as
    the  First Record  Date for all  plans of distribution  of the Trusts  and, accordingly, for  Units purchased on  the Date of
    Deposit, the following  amounts of accrued  interest to  the Settlement Date  will be  added to the  Public Offering  Prices:
    California  Insured  Trust--$.08, New  Jersey  Insured Trust--$.07,  New York  Insured  Trust--$.08 and  Pennsylvania Insured
    Trust--$.08. (See Section 8.)
(2) Assumes delivery of  all Bonds. (See Section  4.) Interest income does  not include accretion of  original issue discount  on
    "zero coupon" Bonds, Stripped Obligations or other original issue discount Bonds. (See "General Trust Information" in Section
    3.)
(3)  The amount and timing of interest distributions from each Trust under the various plans of distribution are shown in Section
    3.
(4) Estimated Long Term Return  for each Trust represents  the average of the yields  to maturity (or call)  of the Bonds in  the
    Trust's  portfolio calculated in accordance with accepted bond practices  and adjusted to reflect expenses and sales charges.
    Estimated Current Return is computed by dividing the Net Annual Interest Income per Unit by the Public Offering Price, and in
    contrast to Estimated Long Term  Return does not reflect the  amortization of premium or accretion  of discount, if any.  For
    more information see page 3 and Section 9.
(5)  Each Trust (and therefore Unitholders) will bear all or  a portion of its organizational costs (including costs of preparing
    the registration statements,  the trust  indenture and other  closing documents,  registering Units with  the Securities  and
    Exchange  Commission and states, the initial audit  of each Trust portfolio, legal fees  and the initial fees and expenses of
    the Trustee but  not including the  expenses incurred in  the printing of  preliminary and final  prospectuses, and  expenses
    incurred  in the preparation and printing of brochures and other  advertising materials and any other selling expenses) as is
    common for mutual funds. Total organizational expenses will be amortized over a five year period. See "WHAT ARE NORMAL  TRUST
    OPERATING  EXPENSES?" and "Statements of Condition."  Historically, the sponsors of unit  investment trusts have paid all the
    costs of establishing such trusts.
</TABLE>
    
 
                                       4
<PAGE>
                   ESSENTIAL INFORMATION REGARDING THE TRUSTS
                                  (CONTINUED)
 
   
<TABLE>
<S>                                              <C>
Record Dates......................................................................See Section 13
Distribution Dates................................................................See Section 13
Minimum Principal Distribution....................................................$0.10 Per Unit
Date Trusts Established..........................................................August 23, 1995
Settlement Date..................................................................August 28, 1995
Mandatory Termination Date........................................................See Section 24
Minimum Value of Each Trust.......................................................See Section 24
Sponsor's Annual Evaluation Fee.......................$0.17 per $1,000 principal amount of Bonds
Trustee's Annual Fees:
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                             PLAN OF DISTRIBUTION
                                                ----------------------------------------------
                    TRUST                         MONTHLY         QUARTERLY       SEMI-ANNUAL
  -----------------------------------------     ------------     ------------     ------------
  <S>                                           <C>              <C>              <C>
  California Insured Trust 253.............          $1.6671          $1.3471         $1.1571
  New Jersey Insured Trust 196.............           1.5723           1.2523          1.0623
  New York Insured Trust 240...............           1.6292           1.3092          1.1192
  Pennsylvania Insured Trust 201...........           1.5763           1.2563          1.0663
  ------------
  * Each Trustee annual fee is per $1,000 principal amount of the underlying Bonds in a  Trust
    for that portion of the Trust that represents a particular plan of distribution.
</TABLE>
    
 
CUSIP Numbers:
 
   
<TABLE>
<CAPTION>
                    TRUST                         MONTHLY         QUARTERLY       SEMI-ANNUAL
  -----------------------------------------     ------------     ------------     ------------
  <S>                                           <C>              <C>              <C>
  California Insured Trust 253.............       67064W 283       67064W 291      67064W 309
  New Jersey Insured Trust 196.............       6706LA 134       6706LA 142      6706LA 159
  New York Insured Trust 240...............       67101K 490       67101K 508      67101K 516
  Pennsylvania Insured Trust 201...........       6706H8 258       6706H8 266      6706H8 274
</TABLE>
    
 
                            ------------------------
 
THE NUVEEN TAX-EXEMPT UNIT TRUST
   
SERIES 820
    
 
   
1.  WHAT IS THE NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 820?
    
 
   
Series  820 of the Nuveen  Tax-Exempt Unit Trust is one  of a series of separate
but similar  investment companies  created  by the  Sponsor,  each of  which  is
designated by a different Series number. This Series consists of four underlying
separate  unit  investment  trusts,  combined  under  one  trust  indenture  and
agreement, designated California  Insured Trust  253, New  Jersey Insured  Trust
196,  New York Insured Trust 240 and Pennsylvania Insured Trust 201. The various
trusts are collectively referred to herein as the "Trusts"; the trusts in  which
few  or  none  of  the  Bonds  are insured  are  sometimes  referred  to  as the
"Traditional Trusts",  the trusts  in which  all  of the  Bonds are  insured  as
described  herein are  sometimes referred  to as  the "Insured  Trusts", and the
state trusts (both  Traditional and Insured)  are sometimes referred  to as  the
"State  Trusts." THERE ARE NO TRADITIONAL TRUSTS IN THIS SERIES. This Series was
created under the laws of  the State of New York  pursuant to a Trust  Indenture
and  Agreement dated August 23, 1995 (the "Indenture") between John Nuveen & Co.
Incorporated (the "Sponsor") and  United States Trust Company  of New York  (the
"Trustee").
    
 
                                       5
<PAGE>
   
    The  Sponsor has deposited with the  Trustee delivery statements relating to
contracts for the  purchase of  municipal debt obligations  together with  funds
represented by an irrevocable letter of credit issued by a major commercial bank
in  the amount, including accrued interest,  required for their purchase (or the
obligations themselves) in  the principal amount  of $17,000,000 (the  "Bonds"),
which  initially constitute the  underlying securities of  the Trusts. Bonds may
include fixed rate obligations with regularly scheduled interest payments,  zero
coupon  bonds and stripped  obligations, which represent  evidences of ownership
interests with respect to either a principal payment or a payment of interest on
a tax-exempt obligation  ("Stripped Obligations"). See  "SUMMARY OF  PORTFOLIOS"
and  "GENERAL  TRUST INFORMATION"  for  a discussion  of  zero coupon  bonds and
Stripped Obligations. The  following principal  amounts were  deposited in  each
Trust:  $5,000,000 in the California Insured Trust, $3,500,000 in the New Jersey
Insured Trust, $5,000,000 in  the New York Insured  Trust and $3,500,000 in  the
Pennsylvania  Insured  Trust.  Some of  the  delivery statements  may  relate to
contracts for the purchase of "when  issued" or other Bonds with delivery  dates
after the date of settlement for a purchase made on the Date of Deposit. See the
"Schedules  of Investments"  and Section  4. For  a discussion  of the Sponsor's
obligations in the event of a failure of any contract for the purchase of any of
the Bonds and its limited right to substitute other bonds to replace any  failed
contract, see Section 4.
    
 
    Payment  of interest on the Bonds in each Insured Trust, and of principal at
maturity, is guaranteed under policies of  insurance obtained by the Sponsor  or
by  the issuers of the Bonds. (See Section  5.) As a general matter, neither the
issuer nor the Sponsor has obtained insurance  with respect to the Bonds in  any
Traditional Trust.
 
   
    The  Trustee has delivered to the  Sponsor registered Units for 50,000 Units
of the California Insured Trust, 35,000  Units of the New Jersey Insured  Trust,
50,000  Units of the New York Insured Trust and 35,000 Units of the Pennsylvania
Insured Trust,  which together  represent ownership  of the  entire Series,  and
which are offered for sale by this Prospectus. Each Unit of a Trust represents a
fractional  undivided interest in the principal and  net income of such Trust in
the ratio  of  10 Units  for  each $1,000  principal  value of  Bonds  initially
deposited in such Trust.
    
 
2.  WHAT ARE THE OBJECTIVES OF THE TRUSTS?
 
The  objectives of the Trusts are income  exempt from Federal income tax and, in
the case of State Trusts, where applicable, state income and intangibles  taxes,
and  conservation of capital, through an  investment in obligations issued by or
on behalf of  states and territories  of the United  States and authorities  and
political  subdivisions thereof,  the interest  on which  is, in  the opinion of
recognized bond counsel  to the  issuing governmental  authorities, exempt  from
Federal income tax under existing law. Bonds in any State Trust have been issued
primarily  by  or on  behalf of  the State  for  which such  Trust is  named and
counties, municipalities, authorities  and political  subdivisions thereof,  the
interest  on which Bonds is, in the opinion of bond counsel, exempt from Federal
and certain state income tax and  intangibles taxes, if any, for purchasers  who
qualify  as residents of that State.  Insurance guaranteeing the timely payment,
when due, of all principal and interest  on the Bonds in each Insured Trust  has
been obtained by the Sponsor or by the issuers of such Bonds from MBIA Insurance
Corporation,  and as a result  of such insurance the  obligations in the Insured
Trusts are rated "Aaa" by Moody's and  "AAA" by Standard & Poor's. (SEE  SECTION
5.)  All obligations in each Traditional Trust  are rated in the category "A" or
better (SP-1 or MIG 2 or better  in the case of short term obligations  included
in  a Short Term Traditional  Trust) by Standard &  Poor's or Moody's (including
provisional   or   conditional    ratings).   In    addition,   certain    Bonds
 
                                       6
<PAGE>
in  certain  Traditional Trusts  may be  covered  by insurance  guaranteeing the
timely payment, when due,  of all principal and  interest. (SEE SECTION 3.)  The
portfolios  of National and State Trusts  consist of long-term (approximately 15
to 40 year maturities) obligations; those of Long Intermediate Trusts consist of
intermediate to long term (approximately 11 to 19 year maturities)  obligations;
those of Intermediate Trusts consist of intermediate term (approximately 5 to 15
year  maturities)  obligations; those  of Short  Intermediate Trusts  consist of
short to intermediate term (approximately  3 to 7 year maturities)  obligations;
and  those of Short Term Trusts consist of short term (approximately 1 to 5 year
maturities) obligations.  There is,  of course,  no guarantee  that the  Trusts'
objectives  will  be achieved.  For  a comparison  of  net after-tax  return for
various tax  brackets  see  the "Taxable  Equivalent  Estimated  Current  Return
Tables" included in this Prospectus.
 
    Each  Trust consists  of fixed-rate  municipal debt  obligations. Because of
this an investment in a Trust should be made with an understanding of the  risks
which an investment in such debt obligations may entail, including the risk that
the  value of the debt obligations and  therefore of the Units will decline with
increases in  interest  rates. In  general,  the  longer the  period  until  the
maturity  of a  Bond, the more  sensitive its  value will be  to fluctuations in
interest rates. During the past decade, there have been substantial fluctuations
in interest  rates, and,  accordingly, in  the value  of debt  obligations.  The
Sponsor cannot predict whether such fluctuations will recur.
 
3.  SUMMARY OF PORTFOLIOS
 
In  selecting  Bonds for  the respective  Trusts,  the following  factors, among
others, were considered: (i) the  Standard & Poor's rating  of the Bonds or  the
Moody's  rating of the Bonds (see Section  2 for a description of minimum rating
standards), (ii) the prices of the  Bonds relative to other bonds of  comparable
quality  and maturity, (iii) the diversification of Bonds as to purpose of issue
and location of issuer,  (iv) the maturity  dates of the Bonds,  and (v) in  the
case  of the Insured Trusts only, the availability of MBIA Insurance Corporation
insurance on such Bonds.
 
    In order for Bonds in the Insured  Trusts to be eligible for MBIA  Insurance
Corporation  insurance,  they must  have  credit characteristics  which,  in the
opinion of the insurer,  would qualify them  as "investment grade"  obligations.
Insurance is not a substitute for the basic credit of an issuer, but supplements
the existing credit and provides additional security therefor. (SEE SECTION 5.)
 
    Certain  bonds may carry a "mandatory put" (also referred to as a "mandatory
tender" or "mandatory repurchase") feature pursuant to which the holder of  such
bonds will receive payment of the full principal amount thereof on a stated date
prior  to the maturity date unless such  holder affirmatively acts to retain the
bond. Under the Indenture,  the Trustee does  not have the  authority to act  to
retain  Bonds with  such features; accordingly,  it will receive  payment of the
full principal amount of any such Bonds on the stated put date and such date  is
therefore  treated as the maturity date of such Bonds in selecting Bonds for the
respective Trusts and for  purposes of calculating the  average maturity of  the
Bonds in any Trust.
 
                                       7
<PAGE>
   
CALIFORNIA INSURED TRUST 253
    
 
   
    The  Portfolio of  California Insured  Trust 253  consists of  9 obligations
issued by entities located  in California. One  Bond in the  Trust is a  general
obligation  of the governmental  entity issuing it  and is backed  by the taxing
power thereof. Eight Bonds in the Trust are payable as to principal and interest
from the income of a specific project or authority and are not supported by  the
issuer's power to levy taxes. The sources of payment for these Bonds are divided
as  follows:  Electrical System  Revenue, 2;  Health  Care Facility  Revenue, 3;
Municipal Lease Revenue, 1; Water and/or Sewer  Revenue, 2. All of the Bonds  in
the Trust, as insured, are rated AAA by Standard & Poor's and Aaa by Moody's
    
 
   
    At  the Date of Deposit, the average maturity of the Bonds in the California
Insured Trust is 27.1  years. The average  maturity of the Bonds  in a Trust  is
calculated based upon the stated maturities of the Bonds in such Trust (or, with
respect  to Bonds for  which funds or  securities have been  placed in escrow to
redeem such Bonds on a stated call date, based upon such call date). The average
maturity of the Bonds in a Trust may  increase or decrease from time to time  as
Bonds mature or are called or sold.
    
 
   
    Approximately  22.5% of the  aggregate principal amount of  the Bonds in the
Trust (accounting for approximately 21.8% of the aggregate offering price of the
Bonds)   are    original   issue    discount   bonds.    See   "GENERAL    TRUST
INFORMATION--ORIGINAL  ISSUE  DISCOUNT  BONDS AND  STRIPPED  OBLIGATIONS"  for a
discussion of the  characteristics of  such bonds  and of  the risks  associated
therewith.
    
 
    Approximately  22% of  the aggregate  principal amount  of the  Bonds in the
Trust consists of obligations  of issuers whose  revenues are primarily  derived
from the sale of electric energy.
 
    Approximately  20% of  the aggregate  principal amount  of the  Bonds in the
Trust consists of obligations  of issuers whose  revenues are primarily  derived
from the sale of water and/or sewerage services.
 
    Approximately  36% of  the aggregate  principal amount  of the  Bonds in the
Trust consists of obligations  of issuers whose  revenues are primarily  derived
from services provided by hospitals or other health care facilities.
 
    For  a discussion of the  risks associated with investments  in the bonds of
various issuers, see "General Trust Information" in this section.
 
   
    The Sponsor entered into contracts to acquire the Bonds on August 22,  1995.
The  following summarizes certain information about the Bonds as of the business
day prior to the Date of Deposit:
    
 
   
<TABLE>
<CAPTION>
                                                                  DIFFERENCE BETWEEN TRUSTEE'S
                                                               DETERMINATION OF OFFERING PRICE AND
   COST TO    PROFIT (OR LOSS)   ANNUAL INTEREST   BID PRICE              THE BID PRICE
   SPONSOR       TO SPONSOR      INCOME TO TRUST    OF BONDS       (AS % OF PRINCIPAL AMOUNT)
  ----------  -----------------  ----------------  ----------  -----------------------------------
  <S>         <C>                <C>               <C>         <C>
  $4,753,818       $12,901           $292,675      $4,741,719                 .50%
</TABLE>
    
 
    Neither  cost  to  Sponsor  nor   profit  (or  loss)  to  Sponsor   reflects
underwriting  profits or losses received or  incurred by the Sponsor through its
participation  in  underwriting  syndicates.  An  underwriter  or   underwriting
syndicate  purchases bonds  from the issuer  on a negotiated  or competitive bid
basis as principal with  the motive of  marketing such bonds  to investors at  a
profit.  The Sponsor did not participate as  either the sole underwriter or as a
manager or member of a syndicate that  acted as the original underwriter of  any
of the Bonds.
 
                                       8
<PAGE>
   
    Unitholders  may elect  to have  interest distributions  made on  a monthly,
quarterly or semi-annual basis. The interest on the Bonds initially deposited in
the California Insured Trust, less estimated expenses, is estimated to accrue at
the rate of $.01571 per Unit per day under the semi-annual plan of distribution,
$.01566 per Unit per  day under the quarterly  plan of distribution and  $.01557
per  Unit per day under the monthly plan of distribution. It is anticipated that
the amount of interest to be distributed  per Unit in each year under each  plan
of  distribution  will initially  be substantially  equal  to the  Estimated Net
Annual Interest Income per Unit for that plan.
    
 
    Details of interest distributions per  Unit of the California Insured  Trust
under  the various plans appear in the  following table based upon estimated Net
Annual Interest Income at the Date of Deposit:
 
   
<TABLE>
<CAPTION>
                                                                                                          NORMAL
                                                                                                      DISTRIBUTIONS
CALIFORNIA INSURED TRUST                          1995                             1996                  PER YEAR
<S>                                     <C>            <C>            <C>            <C>            <C>
----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
--------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5916(1)                                                  $  5.6074
                                                          --------  $.4671 every month  --------
Quarterly Distribution Plan...........  $   .5916(1)   $   .4698(2)   $  1.4094      $  1.4094        $  5.6394
Semi-Annual Distribution Plan.........  $   .5916(1)   $   .4713(3)                  $  2.8278        $  5.6584
--------------------------------------------------------------------------------------------------------------------
<FN>
 * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May  1,
   August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1)  The first distribution will be paid to all Unitholders,  regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The  second distribution  under the  quarterly  distribution plan  represents a  1-month distribution;  subsequent  quarterly
    distributions will be regular 3-month distributions.
(3)  The second distribution  under the semi-annual distribution  plan represents a  1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
    The accrual amounts set forth above, and  in turn the amount of interest  to
be  distributed annually per Unit, will  generally change as Bonds are redeemed,
mature or are sold or as fees and expenses increase or decrease.
 
TAX STATUS--CALIFORNIA INSURED TRUST
 
    For a discussion of  the Federal tax status  of income earned on  California
Insured Trust Units, see Section 11.
 
    In the opinion of Orrick, Herrington & Sutcliffe, special California counsel
to  the Series, under existing California income and property tax law applicable
to individuals who are California residents:
 
        The California  Insured  Trust  is  not  an  association  taxable  as  a
    corporation  and the income of the  California Insured Trust will be treated
    as the income of the Unitholders under the income tax laws of California.
 
        Interest on the underlying securities (which may include bonds or  other
    obligations  issued by the  governments of Puerto  Rico, the Virgin Islands,
    Guam or  the  Northern Mariana  Islands)  which  is exempt  from  tax  under
    California  personal income tax  and property tax laws  when received by the
    California Insured  Trust  will,  under  such laws,  retain  its  status  as
    tax-exempt  interest when  distributed to Unitholders.  However, interest on
    the underlying securities attributed to a Unitholder which is a  corporation
    subject  to the California franchise tax laws may be includable in its gross
    income for purposes of determining its California franchise tax.
 
                                       9
<PAGE>
        Under California  income  tax law,  each  Unitholder in  the  California
    Insured  Trust will have  a taxable event when  the California Insured Trust
    disposes of a security (whether by sale, exchange, redemption or payment  at
    maturity)  or when  the Unitholder  redeems or  sells Units.  Because of the
    requirement that tax cost basis be  reduced to reflect amortization of  bond
    premium, under some circumstances a Unitholder may realize taxable gain when
    Units  are sold  or redeemed  for an  amount equal  to, or  less than, their
    original cost. The total tax cost of each Unit to a Unitholder is  allocated
    among  each of  the bond  issues held  in the  California Insured  Trust (in
    accordance with the proportion of the California Insured Trust comprised  by
    each  bond issue) in order to determine his  per unit tax cost for each bond
    issue; and the tax cost  reduction requirements relating to amortization  of
    bond  premium will apply separately to the per unit cost of each bond issue.
    Unitholders' bases  in  their Units,  and  the bases  for  their  fractional
    interest in each California Insured Trust asset, may have to be adjusted for
    their  pro rata  share of accrued  interest received, if  any, on securities
    delivered after the Unitholders' respective settlement dates.
 
        Under the California  personal property tax  laws, bonds (including  the
    bonds  in  the  California  Insured  Trust  as  well  as  "regular-way"  and
    "when-issued" contracts for the purchase  of bonds) or any interest  therein
    is exempt from such tax.
 
        Any  proceeds paid under  the insurance policy issued  to the Trustee of
    the fund with respect to the bonds  in the California Insured Trust as  well
    as "regular-way" and "when-issued" contracts for the purchase of bonds which
    represent  maturing interest  on defaulted  obligations held  by the Trustee
    will be  exempt from  California personal  income tax  if, and  to the  same
    extent  as, such interest would have been so exempt if paid by the issuer of
    the defaulted obligations.
 
        Under Section 17280(b)(2) of the  California Revenue and Taxation  Code,
    interest on indebtedness incurred or continued to purchase or carry Units of
    the  California  Insured Trust  is not  deductible for  the purposes  of the
    California personal  income  tax. While  there  presently is  no  California
    authority  interpreting  this  provision,  Section  17280(b)(2)  directs the
    California Franchise  Tax Board  to  prescribe regulations  determining  the
    proper  allocation and apportionment of interest costs for this purpose. The
    Franchise Tax Board has not yet proposed or prescribed such regulations.  In
    interpreting  the generally similar Federal  provision, the Internal Revenue
    Service has taken the position that  such indebtedness need not be  directly
    traceable to the purchase or carrying of Units (although the Service has not
    contended that a deduction for interest on indebtedness incurred to purchase
    or  improve  a  personal residence  or  to  purchase goods  or  services for
    personal consumption  will be  disallowed). In  the absence  of  conflicting
    regulations  or  other California  authority,  the California  Franchise Tax
    Board generally  has  interpreted  California statutory  tax  provisions  in
    accord  with  Internal Revenue  Service  interpretations of  similar Federal
    provisions.
 
ECONOMIC FACTORS--CALIFORNIA
 
    As described  above, except  to the  extent the  Fund invests  in  temporary
investments,  the Fund will invest substantially all of its assets in California
Municipal Obligations. The Fund is therefore susceptible to political,  economic
or  regulatory factors  affecting issuers  of California  Municipal Obligations.
These include the possible adverse effects of certain California  constitutional
amendments,  legislative measures, voter initiatives  and other matters that are
described below. The following information provides only a brief summary of  the
complex  factors affecting the  financial situation in  California (the "State")
and is derived from  sources that are generally  available to investors and  are
believed to be accurate. No
 
                                       10
<PAGE>
independent verification has been made of the accuracy or completeness of any of
the  following information.  It is  based in  part on  information obtained from
various State  and  local  agencies  in  California  or  contained  in  Official
Statements for various California Municipal Obligations.
 
    There  can  be  no  assurance that  future  statewide  or  regional economic
difficulties, and the resulting impact  on State or local governmental  finances
generally,  will not adversely  affect the market  value of California Municipal
Obligations held  in the  portfolio of  the Fund  or the  ability of  particular
obligors  to make  timely payments  of debt  service on  (or relating  to) those
obligations.
 
ECONOMIC OVERVIEW
 
    California's economy  is the  largest among  the 50  states and  one of  the
largest  in the  world. The State's  population of almost  32 million represents
12.3% of the total United States population and grew by 27% in the 1980s.  While
the  State's  substantial population  growth during  the 1980s  stimulated local
economic growth and  diversification and  sustained a real  estate boom  between
1984  and 1990, it has increased strains  on the State's limited water resources
and its infrastructure.  Resultant traffic congestion,  school overcrowding  and
high housing costs have increased demands for government services and may impede
future  economic growth. Population growth has slowed between 1991 and 1993 even
while substantial immigration has  continued, due to  a significant increase  in
outmigration  by California residents.  Generally, the household  incomes of new
residents have been substantially lower (and their education and social  service
utilization  higher) than those of departing  households, which may have a major
long-term socioeconomic and fiscal impact. However, with the California  economy
improving,  the recent net outmigration within  the Continental U.S. is expected
to decrease or be reversed.
 
    From mid-1990 to late 1993, the State's economy suffered its worst recession
since the 1930s, with recovery  starting later than for  the nation as a  whole.
The  State  has experienced  the  worst job  losses  of any  post-war recession.
Prerecession job levels may not  be realized until near  the end of the  decade.
The  largest job losses have been in Southern California, led by declines in the
aerospace  and   construction  industries.   Weakness  statewide   occurred   in
manufacturing,  construction,  services  and  trade.  Additional  military  base
closures will have further adverse effects  on the State's economy later in  the
decade.
 
    Since  the start of 1994,  the California economy has  shown signs of steady
recovery and growth.  The State Department  of Finance reports  net job  growth,
particularly  in construction  and related  manufacturing, wholesale  and retail
trade, transportation,  recreation  and services.  This  growth has  offset  the
continuing but slowing job losses in the aerospace industry and restructuring of
the   finance  and  utility   sectors.  Unemployment  in   the  State  was  down
substantially in 1994  from its  10% peak in  January, 1994,  but still  remains
higher  than the national  average rate. Retail  sales were up  strongly in 1994
from year-earlier figures. Delay or  slowdown in recovery will adversely  affect
State revenues.
 
CONSTITUTIONAL LIMITATIONS ON TAXES AND APPROPRIATIONS
 
    LIMITATION  ON  TAXES.  Certain  California  municipal  obligations  may  be
obligations of issuers which rely in  whole or in part, directly or  indirectly,
on  AD  VALOREM property  taxes as  a source  of revenue.  The taxing  powers of
California local governments and districts are  limited by Article XIIIA of  the
California  Constitution, enacted  by the voters  in 1978 and  commonly known as
"Proposition 13." Briefly,  Article XIIIA limits  to 1% of  full cash value  the
rate  of AD VALOREM property taxes on  real property and generally restricts the
reassessment of property to the rate of inflation, not to exceed 2% per year, or
decline in value,  or in the  case of  new construction or  change of  ownership
(subject to a number of exemptions).
 
                                       11
<PAGE>
Taxing  entities may, however, raise AD VALOREM  taxes above the 1% limit to pay
debt service on voter-approved bonded indebtedness.
 
    Under Article XIIIA, the basic 1% AD VALOREM tax levy is applied against the
assessed value of property as of the owner's date of acquisition (or as of March
1, 1975, if acquired earlier), subject  to certain adjustments. This system  has
resulted  in widely  varying amounts  of tax  on similarly  situated properties.
Several lawsuits have  been filed challenging  the acquisition-based  assessment
system of Proposition 13 and on June 18, 1992 the U.S. Supreme Court announced a
decision upholding Proposition 13.
 
    Article  XIIIA prohibits local governments  from raising revenues through AD
VALOREM property  taxes above  the 1%  limit;  it also  requires voters  of  any
governmental  unit to give two-thirds approval  to levy any "special tax." Court
decisions, however, allowed  non-voter approved  levy of  "general taxes"  which
were not dedicated to a specific use. In response to these decisions, the voters
of the State in 1986 adopted an initiative statute which imposed significant new
limits  on the ability of local entities  to raise or levy general taxes, except
by receiving  majority  local  voter  approval.  Significant  elements  of  this
initiative,  "Proposition 62,"  have been overturned  in recent  court cases. An
initiative  proposed  to  re-enact  the  provisions  of  Proposition  62  as   a
constitutional amendment was defeated by the voters in November 1990, but such a
proposal may be renewed in the future.
 
    APPROPRIATIONS  LIMITS. California and its  local governments are subject to
an annual  "appropriations limit"  imposed by  Article XIIIB  of the  California
Constitution,  enacted  by  the  voters in  1979  and  significantly  amended by
Propositions 98 and 111 in 1988 and 1990, respectively. Article XIIIB  prohibits
the  State or any covered local government from spending "appropriations subject
to limitation" in  excess of the  appropriations limit imposed.  "Appropriations
subject  to limitation" are  authorizations to spend  "proceeds of taxes," which
consists of  tax  revenues and  certain  other funds,  including  proceeds  from
regulatory  licenses,  user  charges or  other  fees,  to the  extent  that such
proceeds exceed the cost of providing  the product or service, but "proceeds  of
taxes" excludes most State subventions to local governments. No limit is imposed
on appropriations of funds which are not "proceeds of taxes," such as reasonable
user charges or fees, and certain other non-tax funds, including bond proceeds.
 
    Among  the  expenditures not  included in  the Article  XIIIB appropriations
limit are (1)  the debt  service cost  of bonds  issued or  authorized prior  to
January  1, 1979, or  subsequently authorized by  the voters, (2) appropriations
arising from certain  emergencies declared by  the Governor, (3)  appropriations
for  qualified  capital  outlay projects,  (4)  appropriations by  the  State of
post-1989  increases  in  gasoline  taxes  and  vehicle  weight  fees,  and  (5)
appropriations made in certain cases of emergency.
 
    The  appropriations  limit for  each year  is  adjusted annually  to reflect
changes in  cost  of  living  and  population,  and  any  transfers  of  service
responsibilities  between government units. The definitions for such adjustments
were liberalized in 1990 to follow more closely growth in California's economy.
 
    "Excess" revenues are now  measured over a two-year  cycle. With respect  to
local  governments, excess revenues must be returned  by a revision of tax rates
or fee  schedules within  the two  subsequent fiscal  years. The  appropriations
limit  for  a local  government may  be overridden  by referendum  under certain
conditions for up to four years at a time. With respect to the State, 50% of any
excess revenues is  to be  distributed to  K-12 school  districts and  community
college  districts (collectively, "K-14  districts") and the other  50% is to be
refunded to taxpayers. With more  liberal annual adjustment factors since  1988,
and  depressed revenues  since 1990 because  of the  recession, few governments,
including the State,
 
                                       12
<PAGE>
are currently  operating near  their  spending limits,  but this  condition  may
change  over time. Local governments may by voter approval exceed their spending
limits for up to four years.
 
    Because of the complex nature of Articles XIIIA and XIIIB of the  California
Constitution,  the ambiguities and possible  inconsistencies in their terms, and
the impossibility of predicting future  appropriations or changes in  population
and  cost of living, and  the probability of continuing  legal challenges, it is
not currently possible to determine fully the impact of Article XIIIA or Article
XIIIB on California  Municipal Obligations or  on the ability  of California  or
local  governments to pay debt service on such California Municipal Obligations.
It is not presently  possible to predict the  outcome of any pending  litigation
with  respect  to  the ultimate  scope,  impact or  constitutionality  of either
Article XIIIA or Article  XIIIB, or the impact  of any such determinations  upon
State  agencies or local governments, or upon  their ability to pay debt service
on their obligations. Future initiatives or  legislative changes in laws or  the
California  Constitution  may also  affect  the ability  of  the State  or local
issuers to repay their obligations.
 
    OBLIGATIONS OF THE STATE OF  CALIFORNIA. Under the California  Constitution,
debt service on outstanding general obligation bonds is the second charge to the
General  Fund after support of the  public school system and public institutions
of higher  education.  Total  outstanding  general  obligation  bond  and  lease
purchase debt of the State increased from $9.4 billion at June 30, 1987 to $23.5
billion at June 30, 1994. In FY1993-94, debt service on general obligation bonds
and lease purchase debt was approximately 5.2% of General Fund revenues.
 
    RECENT  FINANCIAL RESULTS. The principal sources of General Fund revenues in
1992-93 were the  California personal income  tax (44% of  total revenues),  the
sales  tax (38%), bank and corporation taxes (12%), and the gross premium tax on
insurance (3%). California maintains a  Special Fund for Economic  Uncertainties
(the  "Economic Uncertainties Fund"),  derived from General  Fund revenues, as a
reserve to meet cash needs of the General Fund.
 
    GENERAL. Throughout  the 1980's,  State spending  increased rapidly  as  the
State population and economy also grew rapidly, including increased spending for
many  assistance  programs  to  local  governments,  which  were  constrained by
Proposition 13 and other laws. The largest State program is assistance to  local
public  school districts.  In 1988, an  initiative (Proposition  98) was enacted
which (subject to  suspension by a  two-thirds vote of  the Legislature and  the
Governor)  guarantees local school  districts and community  college districts a
minimum share of State General Fund revenues (currently about 33%).
 
    Since the  start  of  1990-91  Fiscal Year,  the  State  has  faced  adverse
economic,  fiscal,  and  budget  conditions.  The  economic  recession seriously
affected State tax revenues.  It also caused  increased expenditures for  health
and  welfare programs. The  State is also  facing 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. These structured concerns
will be  exacerbated in  coming  years by  the  expected need  to  substantially
increase  capital and operating  funds for corrections  as a result  of a "Three
Strikes" law enacted in 1994. As a result, the State entered a period of  budget
imbalance,  with expenditures  exceeding revenues  for four  of the  five fiscal
years ending in 1991-92; revenues and expenditures were about equal in  1992-93.
By  June 30,  1993, the State's  General Fund  had an accumulated  deficit, on a
budget basis, of approximately $2.8 billion.
 
    RECENT BUDGETS. The  state failed  to enact its  1992-93 budget  by July  1,
1992.  Although the  State had no  legal authority  to pay many  of its vendors,
certain obligations (such as debt
 
                                       13
<PAGE>
service, school apportionments,  welfare payments, and  employee salaries)  were
payable  because  of  continuing  or special  appropriations,  or  court orders.
However, the State Controller did not have  enough cash to pay as they came  due
all  of these ongoing obligations, as well  as valid obligations incurred in the
prior fiscal year.
 
    Starting on July 1, 1992, the  Controller was required to issue  "registered
warrants"  in  lieu  of  normal  warrants  backed  by  cash  to  pay  many State
obligations. Available  cash  was  used to  pay  constitutionally  mandated  and
priority  obligations.  Between July  1 and  September  3, 1992,  the Controller
issued an aggregate of approximately $3.8 billion of registered warrants all  of
which were called for redemption by September 4, 1992 following enactment of the
1992-93 Budget Act and issuance by the State of short-term notes.
 
    The 1992-93 Budget Act, when finally adopted, was projected to eliminate the
State's accumulated deficit, with additional expenditure cuts and a $1.3 billion
transfer of State education funding costs to local governments by shifting local
property  taxes to school districts. However,  as the recession continued longer
and deeper than expected,  revenues once again were  far below projections,  and
only  reached a level just equal to  the amount of expenditures. Thus, the State
continued to carry its $2.8 billion budget deficit at June 30, 1993.
 
    The 1993-94 Budget  Act represented  a third consecutive  year of  difficult
budget  choices. As in the prior year, the budget contained no general state tax
increases, and relied principally on  expenditure cuts, particularly for  health
and  welfare and  higher education,  a two-year  suspension of  the renters' tax
credit, some one-time and accounting  adjustments, and -- the largest  component
--  an additional $2.6 billion transfer of property taxes from local government,
particularly counties, to  school districts  to reduce  State education  funding
requirements.  A temporary state sales tax scheduled  to expire on June 30, 1993
was extended for six  months, and dedicated to  support local government  public
safety costs.
 
    A  major  feature  of  the  budget was  a  two-year  plan  to  eliminate the
accumulated deficit  by  borrowing  into  the  1994-95  fiscal  year.  With  the
recession  still  continuing longer  than expected,  the  General Fund  had $800
million less revenue and  $800 million higher expenditures  than budgeted. As  a
result  revenues only exceed  expenditures by about  $500 million. However, this
was the  first operating  surplus  in four  years  and reduced  the  accumulated
deficit  to $2.0 billion at June 30, 1994 (after taking account of certain other
accounting reserves).
 
    CURRENT BUDGET.  The 1994-95  Budget Act  was passed  on July  8, 1994,  and
provides  for an  estimated $41.9  billion of  General Fund  revenues, and $40.9
billion of expenditures. The budget assumed receipt of about $750 million of new
federal assistance for the costs of incarceration, education, health and welfare
related to undocumented immigrants. Other major components of the budget include
further reductions  in health  and welfare  costs and  miscellaneous  government
costs,  some additional transfers of funds from  local government, and a plan to
defer retirement of $1 billion of the accumulated budget deficit to the  1995-96
fiscal  year. The federal government has apparently budgeted only $33 million of
the expected immigration aid. However, this  shortfall is expected to be  almost
fully  offset  by  higher  than projected  revenues,  and  lower  than projected
caseload growth, as the economy improves.
 
    The State issued $7.0 billion of short-term  debt in July, 1994 to meet  its
cash  flow needs and to  finance the deferral of  part of the accumulated budget
deficit to the  1995-96 fiscal  year. In  order to  assure repayment  of the  $4
billion,  22-month part  of this borrowing,  the State  enacted legislation (the
"Trigger Law") which  can lead  to automatic, across-the-board  cuts in  General
Fund  expenditures in either  the 1994-95 or  1995-96 fiscal years  if cash flow
 
                                       14
<PAGE>
projections made at certain times during those years show deterioration from the
projections made in  July 1994 when  the borrowings were  made. On November  15,
1994,  the State Controller  as part of  the Trigger Law  reported that the cash
position of the General Fund on June 30, 1995 would be about $580 million better
than earlier  projected, so  no automatic  budget adjustments  were required  in
1994-95. The Controller's report showed that loss of federal funds was offset by
higher  revenues,  lower  expenditures,  and  certain  other  increases  in cash
resources.
 
    PROPOSED 1995-96 BUDGET.   On January 10, 1995,  the Governor presented  his
proposed FY 1995-96 Budget. This budget projects total General Fund revenues and
transfers  of $42.5 billion, and expenditures  of $41.7 billion, to complete the
elimination of  the  accumulated  deficits from  earlier  years.  However,  this
proposal  leaves no cushion,  as the projected  budget reserve at  June 30, 1996
would be  only about  $92  million. While  proposing  increases in  funding  for
schools,  universities and  corrections, the  Governor proposes  further cuts in
welfare programs,  and a  continuation of  the "realignment"  of functions  with
counties  which  would save  the  State about  $240  million. The  Governor also
expects about  $800  million  in  new  federal aid  for  the  State's  costs  of
incarcerating  and educating illegal  immigrants. The Budget  proposal also does
not account for  possible additional  costs if the  State loses  its appeals  on
lawsuits  which are currently pending concerning  such matters as school funding
and pension payments,  but these appeals  could take several  years to  resolve.
Part  of  the Governor's  proposal  also is  a 15%  cut  in personal  income and
corporate taxes, to be phased in  over three years, starting with calendar  year
1996 (which would have only a small impact on 1995-96 income).
 
    The  State's  difficult financial  condition  for the  current  and upcoming
budget  years  will  result  in   continued  pressure  upon  almost  all   local
governments,  particularly school districts  and counties which  depend on State
aid. Despite efforts in recent years  to increase taxes and reduce  governmental
expenditures, there can be no assurance that the State will not face budget gaps
in the future.
 
    BOND  RATING.   State general obligation bonds ratings were reduced in July,
1994 to "A1" by Moody's and "A" by S&P. Both of these ratings were reduced  from
"AAA"  levels which the  State held until  late 1991. There  can be no assurance
that such ratings will be maintained in the future. It should be noted that  the
creditworthiness  of  obligations  issued  by local  California  issuers  may be
unrelated to  the  creditworthiness  of  obligations  issued  by  the  State  of
California,  and that there  is no obligation on  the part of  the State to make
payment on such local obligations in the event of default.
 
    LEGAL PROCEEDINGS.   The  State  is involved  in certain  legal  proceedings
(described  in the State's recent financial statements) that, if decided against
the State, may require the State to make significant future expenditures or  may
substantially  impair  revenues. Trial  courts  have recently  entered tentative
decisions or  injunctions which  would  overturn several  parts of  the  state's
recent  budget  compromises. The  matters covered  by  these lawsuits  include a
deferral of payments  by the State  to the Public  Employees Retirement  System,
reductions  in welfare payments, and the use  of certain cigarette tax funds for
health costs. All of these cases are subject to further proceedings and appeals,
and if  the State  eventually  loses, the  final remedies  may  not have  to  be
implemented in one year.
 
OBLIGATIONS OF OTHER ISSUERS
 
    OTHER  ISSUERS OF  CALIFORNIA MUNICIPAL OBLIGATIONS.  There are  a number of
state agencies, instrumentalities and political  subdivisions of the State  that
issue  Municipal Obligations, some  of which may  be conduit revenue obligations
payable from  payments from  private borrowers.  These entities  are subject  to
various economic risks and uncertainties, and the
 
                                       15
<PAGE>
credit  quality of the securities issued by  them may vary considerably from the
credit quality of the  obligations backed by  the full faith  and credit of  the
State.
 
    STATE  ASSISTANCE.  Property  tax  revenues  received  by  local governments
declined more than 50%  following passage of  Proposition 13. Subsequently,  the
California Legislature enacted measures to provide for the redistribution of the
State's  General Fund  surplus to  local agencies,  the reallocation  of certain
State revenues  to local  agencies and  the assumption  of certain  governmental
functions  by the State  to assist municipal issuers  to raise revenues. Through
1990-91, local assistance (including public schools) accounted for approximately
75% of General Fund  spending. To reduce State  General Fund support for  school
districts,  the  1992-93 and  1993-94 Budget  Acts  caused local  governments to
transfer $3.9 billion of property tax revenues to school districts, representing
loss of all of the post-Proposition 13 "bailout" aid. The largest share of these
transfers came from counties, and the balance from cities, special districts and
redevelopment agencies.  In order  to make  up this  shortfall, the  Legislature
proposed  and  voters approved  in  1993 dedicating  0.5%  of the  sales  tax to
counties and cities for public safety purposes. In addition, the Legislature has
changed laws to relieve local governments of certain mandates, allowing them  to
reduce costs.
 
    To  the  extent  the  State  should  be  constrained  by  its  Article XIIIB
appropriations limit, or its obligation to  conform to Proposition 98, or  other
fiscal  considerations,  the absolute  level, or  the rate  of growth,  of State
assistance to local governments may be reduced. Any such reductions in State aid
could compound the serious fiscal constraints already experienced by many  local
governments,  particularly counties. At least  one rural county (Butte) publicly
announced that it might  enter bankruptcy proceedings  in August 1990,  although
such  plans  were put  off after  the Governor  approved legislation  to provide
additional funds for the county. Other  counties have also indicated that  their
budgetary  condition is  extremely grave.  The Richmond  Unified School District
(Contra Costa  County)  entered  bankruptcy  proceedings in  May  1991  but  the
proceedings have been dismissed.
 
    ASSESSMENT  BONDS.  California  Municipal Obligations  which  are assessment
bonds may be adversely affected by a general decline in real estate values or  a
slowdown in real estate sales activity. In many cases, such bonds are secured by
land  which  is  undeveloped at  the  time  of issuance  but  anticipated  to be
developed within a few years after issuance.  In the event of such reduction  or
slowdown,  such development may not occur  or may be delayed, thereby increasing
the risk of a  default on the  bonds. Because the  special assessments or  taxes
securing  these  bonds are  not  the personal  liability  of the  owners  of the
property assessed, the lien on the property is the only security for the  bonds.
Moreover,  in  most cases  the issuer  of these  bonds is  not required  to make
payments on the bonds in the event of delinquency in the payment of  assessments
or  taxes, except from  amounts, if any,  in a reserve  fund established for the
bonds.
 
    CALIFORNIA LONG-TERM LEASE OBLIGATIONS.  Certain California long-term  lease
obligations, though typically payable from the general fund of the municipality,
are subject to "abatement" in the event the facility being leased is unavailable
for  beneficial use  and occupancy  by the municipality  during the  term of the
lease. Abatement is not a default, and there may be no remedies available to the
holders of  the  certificates  evidencing  the lease  obligation  in  the  event
abatement  occurs. The  most common cases  of abatement are  failure to complete
construction of the  facility before the  end of the  period during which  lease
payments  have been  capitalized and uninsured  casualty losses  to the facility
(E.G., due to earthquake). In the event abatement occurs with respect to a lease
obligation, lease  payments  may  be interrupted  (if  all  available  insurance
proceeds  and reserves are exhausted) and the  certificates may not be paid when
due.
 
                                       16
<PAGE>
    Several years  ago the  Richmond Unified  School District  (the  "District")
entered  into a  lease transaction in  which certain existing  properties of the
District were sold and leased back in  order to obtain funds to cover  operating
deficits.  Following a fiscal crisis in which the District's finances were taken
over by  a State  receiver  (including a  brief  period under  bankruptcy  court
protection),  the  District  failed  to  make  rental  payments  on  this lease,
resulting in  a lawsuit  by the  Trustee for  the Certificate  of  Participation
holders,  in  which the  State was  a named  defendant (on  the grounds  that it
controlled the District's  finances). One of  the defenses raised  in answer  to
this  lawsuit was the  invalidity of the  District's lease. The  trial court has
upheld the validity of  the lease and  the case has  been settled. Any  ultimate
judgment  in any future case against the position asserted by the Trustee in the
Richmond case may have adverse implications for lease transactions of a  similar
nature by other California entities.
 
    OTHER  CONSIDERATIONS.  The repayment  of industrial  development securities
secured by real property may be affected by California laws limiting foreclosure
rights of creditors. Securities backed by health care and hospital revenues  may
be  affected by  changes in State  regulations governing  cost reimbursements to
health care providers under Medi-Cal  (the State's Medicaid program),  including
risks  related  to  the  policy  of  awarding  exclusive  contracts  to  certain
hospitals.
 
    Limitations on  AD  VALOREM  property taxes  may  particularly  affect  "tax
allocation"  bonds issued by  California redevelopment agencies.  Such bonds are
secured solely by the increase in assessed valuation of a redevelopment  project
area  after  the start  of redevelopment  activity. In  the event  that assessed
values in the redevelopment  project decline (E.G., because  of a major  natural
disaster  such as an earthquake), the  tax increment revenue may be insufficient
to make principal  and interest payments  on these bonds.  Both Moody's and  S&P
suspended  ratings on  California tax  allocation bonds  after the  enactment of
Articles XIIIA and XIIIB, and only resumed such ratings on a selective basis.
 
    Proposition 87, approved  by California  voters in 1988,  requires that  all
revenues  produced by a tax rate increase go directly to the taxing entity which
increased such tax rate to repay that entity's general obligation  indebtedness.
As  a result, redevelopment  agencies (which, typically, are  the issuers of tax
allocation securities) no longer receive an increase in tax increment when taxes
on property in  the project area  are increased to  repay voter-approved  bonded
indebtedness.
 
    The  effect of these  various constitutional and  statutory changes upon the
ability of California municipal securities issuers to pay interest and principal
on their obligations remains unclear. Furthermore, other measures affecting  the
taxing  or spending authority of California or its political subdivisions may be
approved or enacted  in the future.  Legislation has been  or may be  introduced
which  would modify  existing taxes or  other revenue-raising  measures or which
either would further limit  or, alternatively, would  increase the abilities  of
state  and local governments to impose new  taxes or increase existing taxes. It
is not presently possible  to predict the extent  to which any such  legislation
will  be enacted. Nor  is it presently  possible to determine  the impact of any
such legislation  on California  Municipal  Obligations in  which the  Fund  may
invest,  future  allocations  of  state revenues  to  local  governments  or the
abilities of state or  local governments to  pay the interest  on, or repay  the
principal of, such California Municipal Obligations.
 
    Substantially  all of California is within an active geologic region subject
to major seismic activity. Northern  California in 1989 and Southern  California
in  1994 experienced major  earthquakes causing billions  of dollars in damages.
The  federal  government  provided  more  than  $13  billion  in  aid  for  both
earthquakes, and neither event is expected to have any
 
                                       17
<PAGE>
long-term  negative economic impact. Any  California Municipal Obligation in the
California Insured  Trust  could be  affected  by an  interruption  of  revenues
because  of  damaged facilities,  or,  consequently, income  tax  deductions for
casualty losses or  property tax assessment  reductions. Compensatory  financial
assistance  could  be constrained  by the  inability  of (i)  an issuer  to have
obtained earthquake insurance coverage at  reasonable rates; (ii) an insurer  to
perform  on its  contracts of  insurance in the  event of  widespread losses; or
(iii) the Federal  or State  government to appropriate  sufficient funds  within
their respective budget limitations.
 
    On  January 17, 1994, a major earthquake  with an estimated magnitude of 6.8
on the Richter scale struck the  Los Angeles area, causing significant  property
damage  to public and private facilities, presently estimated at $15-20 billion.
While over $9.5 billion of  federal aid, and a  projected $1.9 billion of  State
aid,  plus insurance proceeds, will  reimburse much of that  loss, there will be
some ultimate loss of wealth and income  in the region, in addition to costs  of
the  disruption  caused  by  the  event.  Short-term  economic  projections  are
generally neutral, as the  infusion of aid will  restore billions of dollars  to
the  local economy within a few  months; already the local construction industry
has picked up. Although the earthquake  will hinder recovery from the  recession
in  Southern California, already hard-hit, its  long-term impact is not expected
to be material in the context of  the overall wealth of the region. Almost  five
years  after the event, there are few  remaining effects of the 1989 Loma Prieta
earthquake in northern  California (which,  however, caused  less severe  damage
than Northridge).
 
    On December 7, 1994, Orange County, California (the "County"), together with
its  pooled  investment  fund (the  "Pooled  Fund") filed  for  protection under
Chapter 9 of the federal Bankruptcy Code, after reports that the Pooled Fund had
suffered significant market losses in its investments caused a liquidity  crisis
for  the Pooled Fund and  the County. More than  180 other public entities, most
but not all located in the County,  were also depositors in the Pooled Fund.  As
of mid-January, 1995, the County estimated the Pooled Fund's loss at about $1.64
billion of its initial deposits of around $7.5 billion. The Pooled Fund has been
almost  completely restructured  to reduce its  exposure to  changes in interest
rates. Many of the entities which kept moneys in the Pooled Fund, including  the
County,  are facing cash flow difficulties  because of the bankruptcy filing and
may be required to reduce programs or  capital projects. The County and some  of
these  entities have, and others may in  the future, default in payment of their
obligations. Moody's  and Standard  & Poor's  have suspended,  reduced to  below
investment  grade levels, or placed on  "Credit Watch" various securities of the
County and the entities participating in the Pooled Fund.
 
    The State of California has no obligation with respect to any obligations or
securities of the County  or any of the  other participating entities,  although
under  existing  legal precedents,  the State  may be  obligated to  ensure that
school districts have sufficient funds to operate.
 
                                       18
<PAGE>
CALIFORNIA TAXABLE ESTIMATED CURRENT RETURN TABLE
 
    The following tables show the approximate taxable estimated current  returns
for  individuals  that are  equivalent to  tax-exempt estimated  current returns
under combined Federal and  state taxes, using  published 1995 marginal  Federal
tax  rates and marginal state tax rates  currently available and scheduled to be
in  effect.  The  tables  incorporate  increased  tax  rates  for  higher-income
taxpayers  that were  included in  the Revenue  Reconciliation Act  of 1993. For
cases in which more than one state  bracket falls within a Federal bracket,  the
highest  state bracket is combined with  the Federal bracket. The combined state
and Federal tax  brackets shown  reflect the fact  that state  tax payments  are
currently  deductible for Federal  tax purposes. The  tables illustrate what you
would have to  earn on  taxable investments  to equal  the tax-exempt  estimated
current  return for your income  tax bracket. A taxpayer's  marginal tax rate is
affected by both his taxable income  and his adjusted gross income. Locate  your
adjusted  gross and  your taxable  income (which  is your  adjusted gross income
reduced by any deductions and exemptions), then locate your tax bracket based on
joint or single  tax filing.  Read across  to the  equivalent taxable  estimated
current return you would need to match the tax-free income.
 
 COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS      STATE* AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 39.0 $     0-114.7      20.0   %     5.63    5.94    6.25    6.56    6.88    7.19    7.50    7.81
    39.0- 94.3       0-114.7      34.5         6.87    7.25    7.63    8.02    8.40    8.78    9.16    9.54
                 114.7-172.1      35.5         6.98    7.36    7.75    8.14    8.53    8.91    9.30    9.69
    94.3-143.6       0-114.7      37.5         7.20    7.60    8.00    8.40    8.80    9.20    9.60   10.00
                 114.7-172.1      38.5         7.32    7.72    8.13    8.54    8.94    9.35    9.76   10.16
                 172.1-214.9      40.5         7.56    7.98    8.40    8.82    9.24    9.66   10.08   10.50
   143.6-214.9   114.7-172.1      43.0         7.89    8.33    8.77    9.21    9.65   10.09   10.53   10.96
                 172.1-214.9      45.5         8.26    8.72    9.17    9.63   10.09   10.55   11.01   11.47
                 214.9-239.9      46.5         8.41    8.88    9.35    9.81   10.28   10.75   11.21   11.68
                 239.9-294.6      46.0         8.33    8.80    9.26    9.72   10.19   10.65   11.11   11.57
                  Over 294.6      43.5   2     7.96    8.41    8.85    9.29    9.73   10.18   10.62   11.06
   214.9-256.5   172.1-214.9      46.0         8.33    8.80    9.26    9.72   10.19   10.65   11.11   11.57
                 214.9-239.9      47.0         8.49    8.96    9.43    9.91   10.38   10.85   11.32   11.79
                 239.9-294.6      46.5         8.41    8.88    9.35    9.81   10.28   10.75   11.21   11.68
                  Over 294.6      44.0   2     8.04    8.48    8.93    9.38    9.82   10.27   10.71   11.16
   256.5-429.9   239.9-294.6      50.0         9.00    9.50   10.00   10.50   11.00   11.50   12.00   12.50
                  Over 294.6      47.0   3     8.49    8.96    9.43    9.91   10.38   10.85   11.32   11.79
    Over 429.9    Over 294.6      47.5   3     8.57    9.05    9.52   10.00   10.48   10.95   11.43   11.90
</TABLE>
 
                                       19
<PAGE>
  COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS      STATE* AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 23.4 $     0-107.5      20.0   %     5.63    5.94    6.25    6.56    6.88    7.19    7.50    7.81
    23.4- 56.6       0-107.5      34.5         6.87    7.25    7.63    8.02    8.40    8.78    9.16    9.54
    56.6-107.5       0-107.5      37.5         7.20    7.60    8.00    8.40    8.80    9.20    9.60   10.00
                 107.5-114.7      38.0         7.26    7.66    8.06    8.47    8.87    9.27    9.68   10.08
                 114.7-132.5      39.5         7.44    7.85    8.26    8.68    9.09    9.50    9.92   10.33
                 132.5-237.2      39.0         7.38    7.79    8.20    8.61    9.02    9.43    9.84   10.25
   107.5-118.0       0-107.5      38.0         7.26    7.66    8.06    8.47    8.87    9.27    9.68   10.08
                 107.5-114.7      38.5         7.32    7.72    8.13    8.54    8.94    9.35    9.76   10.16
                 114.7-132.5      40.0         7.50    7.92    8.33    8.75    9.17    9.58   10.00   10.42
                 132.5-237.2      39.5         7.44    7.85    8.26    8.68    9.09    9.50    9.92   10.33
   118.0-214.9   114.7-132.5      44.5         8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
                 132.5-237.2      44.5         8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
                  Over 237.2      44.0   2     8.04    8.48    8.93    9.38    9.82   10.27   10.71   11.16
   214.9-256.5   132.5-237.2      45.0         8.18    8.64    9.09    9.55   10.00   10.45   10.91   11.36
                  Over 237.2      44.5   2     8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
    Over 256.5    Over 237.2      47.5   3     8.57    9.05    9.52   10.00   10.48   10.95   11.43   11.90
<FN>
------------------
    *  The State tax rates assumed take into account the adjustment  of tax brackets based on changes in the Consumer Price Index
for 1994.
      1 The table reflects the effect of the limitations  on itemized deductions and the deduction for personal exemptions.  They
were  designed to phase out certain benefits of these deductions for higher income taxpayers. These limitations, in effect, raise
the current maximum marginal Federal tax rate to approximately 44.0  percent for taxpayers filing a joint return and entitled  to
four  personal exemptions and to  approximately 41.0 percent for taxpayers  filing a single return  entitled to only one personal
exemption. These limitations are  subject to certain maximums,  which depend on  the number of exemptions  claimed and the  total
amount  of the taxpayer's itemized  deductions. For example, the limitation  on itemized deductions will  not cause a taxpayer to
lose more than 80% of his allowable itemized deductions,  with certain exceptions. The table also reflects California income  tax
laws  that increase state income tax rates for high income taxpayers,  limit itemized deductions and phase out the benefit of the
personal exemption credit and the dependent exemption credit in a manner similar to Federal tax law.
      2 Federal tax rate reverts to 36.0% and the state tax rate reverts to the applicable stated maximum rate after the 80%  cap
on the limitation on itemized deductions, under federal or state law, as appropriate has been met.
      3 Federal tax rate reverts to 39.6% after the 80% cap on the limitation on itemized deductions has been met.
</TABLE>
 
    A  comparison of tax-free  and equivalent taxable  estimated current returns
with the returns on  various taxable investments is  one element to consider  in
making  an  investment  decision. The  Sponsor  may  from time  to  time  in its
advertising and sales materials  compare the then  current estimated returns  on
the Trust and returns over specified periods on other similar Nuveen Trusts with
returns  on taxable investments such as corporate or U.S. Government bonds, bank
CDs and  money  market  accounts  or  money market  funds,  each  of  which  has
investment  characteristics  that  may  differ from  those  of  the  Trust. U.S.
Government bonds, for example, are  backed by the full  faith and credit of  the
U.S.  Government and bank CDs and money market accounts are insured by an agency
of the federal government. Money market accounts and money market funds  provide
stability  of principal, but pay interest at  rates that vary with the condition
of the short-term debt market. The  investment characteristics of the Trust  are
described more fully elsewhere in this Prospectus.
 
                                       20
<PAGE>
   
NUVEEN TAX-EXEMPT UNIT TRUST
SCHEDULE OF INVESTMENTS AT DATE OF DEPOSIT
AUGUST 23, 1995
CALIFORNIA INSURED TRUST 253
(SERIES 820)
    
 
   
<TABLE>
<CAPTION>
                                                                                          Ratings(3)           Trustee's
                                                                      Optional       ---------------------   Determination
 Aggregate        Name of Issuer and Title of Issue Represented      Redemption       Standard                of Offering
  Principal        by Sponsor's Contracts to Purchase Bonds(1)      Provisions(2)     & Poor's    Moody's      Price(4)
<C>          <C> <S>                                              <C>                <C>         <C>        <C>
---------------------------------------------------------------------------------------------------------------------------
$   750,000      State of California, Various Purpose General        2004 at 102        AAA         Aaa     $       734,835
                   Obligation Bonds, 6.00% Due 8/1/24.
    550,000      California Statewide Communities Development        2005 at 102        AAA         Aaa             531,465
                   Authority, Certificates of Participation
                   (Sutter Health Obligated Group), 6.00% Due
                   8/15/25.
    750,000      City of Fresno, California, Health Facility         2003 at 102        AAA         Aaa             696,458
                   Revenue Bonds, Series 1993B (Holy Cross
                   Health System Corporation), 5.625% Due
                   12/1/15.
    750,000      The City of Los Angeles, California, Wastewater     2004 at 102        AAA         Aaa             717,383
                   System Revenue Bonds, Series 1994-A, 5.875%
                   Due 6/1/24.
    750,000      Department of Water and Power of The City of        2003 at 102        AAA         Aaa             663,698
                   Los Angeles (California), Electric Plant
                   Refunding Revenue Bonds, Issue of 1993,
                   5.375% Due 9/1/23. (Original issue discount
                   bonds delivered on or about April 15, 1993 at
                   a price of 93.281% of principal amount.)
    500,000      County of Madera, California, Certificates of       2005 at 102        AAA         Aaa             491,805
                   Participation (Valley Children's Hospital
                   Project), Series 1995, 6.125% Due 3/15/23.
    375,000      County of San Diego (California), Certificates      2004 at 102        AAA         Aaa             376,451
                   of Participation (1994 Inmate Reception
                   Center and Cooling Plant Financing), 6.25%
                   Due 8/1/24. (Original issue discount bonds
                   delivered on or about November 30, 1994 at a
                   price of 89.526% of principal amount.)
    325,000      The City of San Diego, California, Industrial       2003 at 102        AAA         Aaa             313,121
                   Development Revenue Refunding Bonds (San
                   Diego Gas & Electric Company), 1993 Series C,
                   5.90% Due 9/1/18.
    250,000      City and County of San Francisco, California,       2003 at 102        AAA         Aaa             241,503
                   Sewer Revenue Bonds, Series 1995A, 5.95% Due
                   10/1/25.
-----------                                                                                                 ---------------
$ 5,000,000                                                                                                 $     4,766,719
-----------                                                                                                 ---------------
-----------                                                                                                 ---------------
</TABLE>
    
 
See Notes to Schedules of Investments, page 54.
 
                                       21
<PAGE>
   
NEW JERSEY INSURED TRUST 196
    
 
   
    The  Portfolio of  New Jersey  Insured Trust  196 consists  of 7 obligations
issued by entities located  in New Jersey.  Two Bonds in  the Trust are  general
obligations  of the  governmental entities  issuing them  and are  backed by the
taxing powers thereof. Five Bonds in the  Trust are payable as to principal  and
interest  from  the  income of  a  specific  project or  authority  and  are not
supported by the issuer's power to levy taxes. The sources of payment for  these
Bonds are divided as follows: Bridge and Toll Road Revenue, 2; Electrical System
Revenue,  1; Industrial Revenue, 1; Municipal Lease Revenue, 1. All of the Bonds
in the Trust, as insured, are rated AAA by Standard & Poor's and Aaa by Moody's.
    
 
   
    At the Date of Deposit, the average maturity of the Bonds in the New  Jersey
Insured  Trust is 27.7  years. The average maturity  of the Bonds  in a Trust is
calculated based upon the stated maturities of the Bonds in such Trust (or, with
respect to Bonds for  which funds or  securities have been  placed in escrow  to
redeem such Bonds on a stated call date, based upon such call date). The average
maturity  of the Bonds in a Trust may  increase or decrease from time to time as
Bonds mature or are called or sold.
    
 
   
    Approximately 28.6% of the  aggregate principal amount of  the Bonds in  the
Trust (accounting for approximately 26.8% of the aggregate offering price of the
Bonds)    are   original    issue   discount    bonds.   See    "GENERAL   TRUST
INFORMATION--ORIGINAL ISSUE  DISCOUNT  BONDS  AND STRIPPED  OBLIGATIONS"  for  a
discussion  of the  characteristics of  such bonds  and of  the risks associated
therewith.
    
 
    Approximately 29% of  the aggregate  principal amount  of the  Bonds in  the
Trust  consists of obligations  of issuers whose  revenues are primarily derived
from bridge, road or tunnel toll revenues.
 
    For a discussion of  the risks associated with  investments in the bonds  of
various issuers, see "General Trust Information" in this section.
 
   
    The  Sponsor entered into contracts to  acquire the Bonds between August 21,
1995 and August 22, 1995. The following summarizes certain information about the
Bonds as of the business day prior to the Date of Deposit:
    
 
   
<TABLE>
<CAPTION>
                                                                  DIFFERENCE BETWEEN TRUSTEE'S
                                                               DETERMINATION OF OFFERING PRICE AND
   COST TO    PROFIT (OR LOSS)   ANNUAL INTEREST   BID PRICE              THE BID PRICE
   SPONSOR       TO SPONSOR      INCOME TO TRUST    OF BONDS       (AS % OF PRINCIPAL AMOUNT)
  ----------  -----------------  ----------------  ----------  -----------------------------------
  <S>         <C>                <C>               <C>         <C>
  $3,299,160       $12,420           $197,250      $3,294,080                 .50%
</TABLE>
    
 
    Neither  cost  to  Sponsor  nor   profit  (or  loss)  to  Sponsor   reflects
underwriting  profits or losses received or  incurred by the Sponsor through its
participation  in  underwriting  syndicates.  An  underwriter  or   underwriting
syndicate  purchases bonds  from the issuer  on a negotiated  or competitive bid
basis as principal with  the motive of  marketing such bonds  to investors at  a
profit.  The Sponsor did not participate as  either the sole underwriter or as a
manager or member of a syndicate that  acted as the original underwriter of  any
of the Bonds.
 
   
    Unitholders  may elect  to have  interest distributions  made on  a monthly,
quarterly or semi-annual basis. The interest on the Bonds initially deposited in
the New Jersey Insured Trust, less estimated expenses, is estimated to accrue at
the rate of $.01511 per Unit per day under the semi-annual plan of distribution,
$.01506 per Unit per  day under the quarterly  plan of distribution and  $.01497
per  Unit per day under the monthly plan of distribution. It is anticipated that
the amount of interest to be distributed  per Unit in each year under each  plan
of  distribution  will initially  be substantially  equal  to the  Estimated Net
Annual Interest Income per Unit for that plan.
    
 
                                       22
<PAGE>
    Details of interest distributions per Unit  of the New Jersey Insured  Trust
under  the various plans appear in the  following table based upon estimated Net
Annual Interest Income at the Date of Deposit:
 
   
<TABLE>
<CAPTION>
                                                                                                          NORMAL
                                                                                                      DISTRIBUTIONS
NEW JERSEY INSURED TRUST                          1995                             1996                  PER YEAR
<S>                                     <C>            <C>            <C>            <C>            <C>
----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
--------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5688(1)                                                  $  5.3913
                                                          --------  $.4491 every month  --------
Quarterly Distribution Plan...........  $   .5688(1)   $   .4518(2)   $  1.3554      $  1.3554        $  5.4233
Semi-Annual Distribution Plan.........  $   .5688(1)   $   .4533(3)                  $  2.7198        $  5.4423
--------------------------------------------------------------------------------------------------------------------
<FN>
 * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May  1,
   August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1)  The first distribution will be paid to all Unitholders,  regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The  second distribution  under the  quarterly  distribution plan  represents a  1-month distribution;  subsequent  quarterly
    distributions will be regular 3-month distributions.
(3)  The second distribution  under the semi-annual distribution  plan represents a  1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
    The accrual amounts set forth above, and  in turn the amount of interest  to
be  distributed annually per Unit, will  generally change as Bonds are redeemed,
mature or are sold or as fees and expenses increase or decrease.
 
TAX STATUS--NEW JERSEY INSURED TRUST
 
    For a discussion of the  Federal tax status of  income earned on New  Jersey
Insured Trust Units, see Section 11.
 
    The  assets of the New Jersey Insured Trust will consist of interest-bearing
obligations issued by  or on behalf  of the  State of New  Jersey and  counties,
municipalities,  authorities  and  other  political  subdivisions  thereof,  and
certain territories  of the  United  States, including  Puerto Rico,  Guam,  the
Virgin Islands and the Northern Mariana Islands (the "New Jersey Bonds").
 
    In  the opinion  of Pitney,  Hardin, Kipp  & Szuch,  special counsel  to the
Series for New Jersey tax matters, under existing law:
 
        The New Jersey Insured Trust  will be recognized as  a Trust and not  an
    association  taxable as a corporation. The New Jersey Insured Trust will not
    be subject to  the New  Jersey Corporation Business  Tax or  the New  Jersey
    Corporation Income Tax.
 
        With  respect to the non-corporate Unitholders  who are residents of New
    Jersey, the income of the  New Jersey Insured Trust  will be treated as  the
    income  of such Unitholders under the  New Jersey Gross Income Tax. Interest
    on the underlying New Jersey  Bonds which is exempt  from tax under the  New
    Jersey  Gross Income Tax Law  when received by the  New Jersey Insured Trust
    will retain  its  status as  tax-exempt  interest when  distributed  to  the
    Unitholders.
 
        A  non-corporate Unitholder will not be  subject to the New Jersey Gross
    Income Tax on  any gain realized  either when the  New Jersey Insured  Trust
    disposes  of a  New Jersey Bond  (whether by sale,  exchange, redemption, or
    payment at maturity) or when the Unitholder redeems or sells his Units.  Any
    loss  realized  on such  disposition  may not  be  utilized to  offset gains
    realized by such Unitholder on the  disposition of assets the gain on  which
    is subject to the New Jersey Gross Income Tax.
 
                                       23
<PAGE>
        Units  of the New Jersey Insured Trust may  be taxable on the death of a
    Unitholder under the  New Jersey  Transfer Inheritance  Tax Law  or the  New
    Jersey Estate Tax Law.
 
        If  a Unitholder is a corporation  subject to the New Jersey Corporation
    Business Tax or New Jersey Corporation  Income Tax, interest from the  Bonds
    in  the New Jersey Insured Trust which is allocable to such corporation will
    be includable  in its  entire net  income  for purposes  of the  New  Jersey
    Corporation  Business Tax  or New  Jersey Corporation  Income Tax,  less any
    interest expense  incurred  to carry  such  investment to  the  extent  such
    interest  expense has not been deducted in computing Federal taxable income.
    Net gains derived by such corporation  on the disposition of the New  Jersey
    Bonds  by the New  Jersey Insured Trust  or on the  disposition of its Units
    will be included in  its entire net  income for purposes  of the New  Jersey
    Corporation Business Tax or New Jersey Corporation Income Tax.
 
ECONOMIC FACTORS--NEW JERSEY
 
    As  described above, the New Jersey Insured Trust consists of a portfolio of
New Jersey Bonds. The Trust is  therefore susceptible to political, economic  or
regulatory  factors affecting  issuers of  the New  Jersey Bonds.  The following
information provides  only  a brief  summary  of  some of  the  complex  factors
affecting  the financial  situation in New  Jersey (the "State")  and is derived
from sources that  are generally available  to investors and  is believed to  be
accurate.  It is based  in part on  information obtained from  various State and
local agencies in New Jersey. No  independent verification has been made of  any
of the following information.
 
    New  Jersey is the ninth largest state  in population and the fifth smallest
in land area. With an  average of 1,062 people per  square mile, it is the  most
densely  populated of all the states.  The State's economic base is diversified,
consisting of a variety of  manufacturing, construction and service  industries,
supplemented by rural areas with selective commercial agriculture. Historically,
New Jersey's average per capita income has been well above the national average,
and  in 1993  the State ranked  second among  the states in  per capita personal
income ($26,732).
 
    The New Jersey Economic  Policy Council, a statutory  arm of the New  Jersey
Department  of Commerce  and Economic  Development, has  reported in  NEW JERSEY
ECONOMIC INDICATORS,  a monthly  publication  of the  New Jersey  Department  of
Labor,  Division of Labor Market and Demographic Research, that in 1988 and 1989
employment in  New Jersey's  manufacturing  sector failed  to benefit  from  the
export  boom experienced by many Midwest states and the State's service sectors,
which had  fueled the  State's  prosperity since  1982,  lost momentum.  In  the
meantime,  the prolonged fast growth in the State in the mid 1980s resulted in a
tight labor market situation, which has led to relatively high wages and housing
prices. This  means  that,  while  the  incomes  of  New  Jersey  residents  are
relatively  high,  the State's  business sector  has  become more  vulnerable to
competitive pressures.
 
   
    The onset of  the national recession  (which officially began  in July  1990
according to the National Bureau of Economic Research) caused an acceleration of
New  Jersey's job  losses in  construction and  manufacturing. In  addition, the
national recession  caused an  employment downturn  in such  previously  growing
sectors  as wholesale trade,  retail trade, finance,  utilities and trucking and
warehousing. Reflecting the downturn, the rate of unemployment in the State rose
from a low of 3.6% during the first quarter of 1989 to an estimated 6.8% in July
1995, which is higher than the national  average of 5.7% in July 1995.  Economic
recovery  is  likely to  be slow  and  uneven in  New Jersey,  with unemployment
receding at a correspondingly slow pace, due  to the fact that some sectors  may
lag due to continued excess capacity.
    
 
                                       24
<PAGE>
In  addition, employers  even in  rebounding sectors  can be  expected to remain
cautious about hiring until they become convinced that improved business will be
sustained. Also, certain firms  will continue to merge  or downsize to  increase
profitability.
 
    DEBT  SERVICE. The primary method for State financing of capital projects is
through the sale of the general obligation  bonds of the State. These bonds  are
backed  by the full faith and credit of the State tax revenues and certain other
fees are pledged to  meet the principal and  interest payments and if  provided,
redemption premium payments, if any, required to repay the bonds. As of June 30,
1994,  there was  a total  authorized bond  indebtedness of  approximately $9.14
billion, of which  $3.65 billion was  issued and outstanding,  $4.0 billion  was
retired  (including bonds for which provision  for payment has been made through
the sale and issuance  of refunding bonds) and  $1.49 billion was unissued.  The
appropriation  for the debt service  obligation on such outstanding indebtedness
is $466.3 million for Fiscal Year 1996.
 
    NEW JERSEY'S BUDGET AND APPROPRIATION SYSTEM. The State operates on a fiscal
year beginning July 1 and ending June 30. At the end of Fiscal Year 1989,  there
was  a  surplus in  the  State's general  fund (the  fund  into which  all State
revenues not  otherwise  restricted by  statute  are deposited  and  from  which
appropriations  are made)  of $411.2  million. At the  end of  Fiscal Year 1990,
there was a surplus in the general fund of $1 million. At the end of Fiscal Year
1991, there was a surplus in the general fund of $1.4 million. New Jersey closed
its Fiscal Year 1992 with a surplus of $760.8 million and Fiscal Year 1993  with
a  surplus of $937.4 million. It is  estimated that New Jersey closed its Fiscal
Year 1994 with a surplus of $926.0  million and Fiscal Year 1995 with a  surplus
of $563 million.
 
    In  order  to  provide additional  revenues  to balance  future  budgets, to
redistribute school aid and  to contain real property  taxes, on June 27,  1990,
and  July  12,  1990, Governor  Florio  signed  into law  legislation  which was
estimated to raise approximately $2.8 billion in additional taxes (consisting of
$1.5 billion in  sales and  use taxes  and $1.3  billion in  income taxes),  the
biggest  tax hike in New Jersey history. There can be no assurance that receipts
and collections of such taxes will meet such estimates.
 
    The first  part of  the tax  hike  took effect  on July  1, 1990,  with  the
increase in the State's sales and use tax rate from 6% to 7% and the elimination
of  exemptions for certain  products and services not  previously subject to the
tax, such as telephone calls, paper products (which has since been  reinstated),
soaps  and detergents, janitorial services,  alcoholic beverages and cigarettes.
At the  time  of  enactment, it  was  projected  that these  taxes  would  raise
approximately  $1.5 billion in additional  revenue. Projections and estimates of
receipts from sales  and use taxes,  however, have been  subject to variance  in
recent fiscal years.
 
    The  second part of the tax hike took effect on January 1, 1991, in the form
of an increased state income  tax on individuals. At  the time of enactment,  it
was  projected  that this  increase would  raise  approximately $1.3  billion in
additional income taxes to fund a new school aid formula, a new homestead rebate
program and state assumption of  welfare and social services costs.  Projections
and  estimates of receipts from income taxes, however, have also been subject to
variance in  recent  fiscal  years.  Under the  legislation,  income  tax  rates
increased  from their previous range of  2% to 3.5% to a  new range of 2% to 7%,
with the higher rates applying to married couples with incomes exceeding $70,000
who file joint returns, and to individuals filing single returns with incomes of
more than $35,000.
 
    The Florio administration  had contended  that the income  tax package  will
help  reduce  local  property  tax  increases by  providing  more  state  aid to
municipalities.  Under  the  income  tax  legislation  the  State  will   assume
approximately $289 million in social services costs that previously were paid by
counties    and   municipalities    and   funded    by   property    taxes.   In
 
                                       25
<PAGE>
addition, under the new formula for funding school aid, an extra $1.1 billion is
proposed to be sent  by the State  to school districts  beginning in 1991,  thus
reducing the need for property tax increases to support education programs.
 
    Effective July 1, 1992, the State's sales and use tax rate decreased from 7%
to 6%. Effective January 1, 1994, an across-the-board 5% reduction in the income
tax  rates was enacted and effective January 1, 1995, further reductions ranging
from 1% up to  10% in income  tax rates took  effect. Governor Whitman  recently
signed  into  law further  reductions  up to  15%  for some  taxpayers effective
January 1, 1996, completing her campaign promise to reduce income taxes by up to
30% within three years for most taxpayers.
 
    On June 30, 1995, Governor Whitman signed the New Jersey Legislature's $16.0
billion budget for Fiscal  Year 1996. The balanced  budget, which includes  $541
million in surplus, is $300 million more than the 1995 budget. Whether the State
can  achieve a  balanced budget  depends on its  ability to  enact and implement
expenditure reductions and to collect estimated tax revenues.
 
    LITIGATION. The State is a party in numerous legal proceedings pertaining to
matters incidental to the performance  of routine governmental operations.  Such
litigation  includes, but is  not limited to, claims  asserted against the State
arising  from  alleged  torts,  alleged  breaches  of  contracts,   condemnation
proceedings  and other alleged violations of State and Federal laws. Included in
the State's  outstanding litigation  are cases  challenging the  following:  the
funding  of teachers' pension funds,  the method by which  the State shares with
its  counties  maintenance   recoveries  and  costs   for  residents  in   State
institutions,  unreasonably low Medicaid payment  rates for long-term facilities
in New  Jersey, the  obligation of  counties to  maintain Medicaid  or  Medicare
eligible  residents  of  institutions  and  facilities  for  the developmentally
disabled, the hospital assessment  authorized by the Health  Care Reform Act  of
1992,  amounts previously paid by hospitals  into the Health Care Cost Reduction
Fund, various  provisions, and  the constitutionality,  of the  Fair  Automobile
Insurance Reform Act of 1990, the State's role in a consent order concerning the
construction  of a resource facility in Passaic County, actions taken by the New
Jersey Bureau of Securities against an individual, the State's actions regarding
alleged chromium contamination  of State-owned  property in  Hudson County,  the
issuance of emergency redirection orders and a draft permit by the Department of
Environmental  Protection and Energy, refusal of  the State to share with Camden
County federal funding  the State recently  received for disproportionate  share
hospital   payments   made   to   county   psychiatric   facilities,   and   the
constitutionality of annual  A-901 hazardous and  solid waste licensure  renewal
fees collected by the Department of Environmental Protection and Energy. Adverse
judgments  in these  and other  matters could  have the  potential for  either a
significant loss of revenue  or a significant  unanticipated expenditure by  the
State.
 
    At  any given time,  there are various  numbers of claims  and cases pending
against the State,  State agencies  and employees seeking  recovery of  monetary
damages  that are  primarily paid out  of the  fund created pursuant  to the New
Jersey Tort  Claims Act.  In addition,  at  any given  time, there  are  various
numbers of contract claims against the State and State agencies seeking recovery
of  monetary damages.  The State  is unable to  estimate its  exposure for these
claims.
 
    DEBT RATINGS. For many years prior to 1991, both Moody's Investors  Service,
Inc. and Standard and Poor's Corporation had rated New Jersey general obligation
bonds  "Aaa" and  "AAA," respectively.  On July  3, 1991,  however, Standard and
Poor's Corporation downgraded New Jersey  general obligation bonds to "AA+."  On
June  4,  1992,  Standard  and  Poor's  Corporation  placed  New  Jersey general
obligation bonds on CreditWatch with negative
 
                                       26
<PAGE>
implications, citing  as its  principal reason  for its  caution the  unexpected
denial  by the Federal  Government of New  Jersey's request for  $450 million in
retroactive Medicaid  payments  for  psychiatric  hospitals.  These  funds  were
critical  to closing  a $1  billion gap  in the  State's $15  billion budget for
fiscal year 1992 which ended on June  30, 1992. Under New Jersey state law,  the
gap  in the current  budget must be closed  before the new  budget year began on
July 1, 1992. Standard  and Poor's Corporation suggested  the State could  close
fiscal 1992's budget gap and help fill fiscal 1993's hole by a reversion of $700
million  of pension contributions to its general fund under a proposal to change
the way the State  calculates its pension liability.  On July 6, 1992,  Standard
and  Poor's  Corporation  reaffirmed its  "AA+"  rating for  New  Jersey general
obligation bonds and  removed the debt  from its CreditWatch  list, although  it
stated  that New Jersey's long-term financial outlook was negative. Standard and
Poor's Corporation was  concerned that the  State was entering  the 1993  fiscal
year  that began  July 1,  1992, with  a slim  $26 million  surplus and remained
concerned about whether the sagging  State economy would recover quickly  enough
to  meet lawmakers'  revenue projections. It  also remained  concerned about the
recent federal ruling leaving in doubt how much the State was due in retroactive
Medicaid reimbursements and a ruling by a  federal judge, now on appeal, of  the
State's  method for paying for uninsured hospital patients. However, on July 27,
1994, S&P announced that  it was changing the  State's outlook from negative  to
stable  due to a  brightening of the  State's prospects as  a result of Governor
Whitman's effort  to trim  spending and  cut taxes,  coupled with  an  improving
economy. S&P reaffirmed its "AA+" rating at the same time.
 
    On  August 24, 1992,  Moody's Investors Service,  Inc. downgraded New Jersey
general obligation  bonds  to "Aa1",  stating  that the  reduction  reflected  a
developing  pattern of  reliance on  nonrecurring measures  to achieve budgetary
balance, four years  of financial  operations marked by  revenue shortfalls  and
operating  deficits, and the  likelihood that serious  financial pressures would
persist. On August 5, 1994, Moody's  reaffirmed its "Aa1" rating, citing on  the
positive  side New Jersey's broad-based economy,  high income levels, history of
maintaining a  positive financial  position and  moderate (albeit  rising)  debt
ratios, and, on the negative side, a continued reliance on one-time revenues and
a dependence on pension-related savings to achieve budgetary balance.
 
NEW JERSEY TAXABLE ESTIMATED CURRENT RETURN TABLE
 
    The  following tables show the approximate taxable estimated current returns
for individuals  that are  equivalent to  tax-exempt estimated  current  returns
under  combined Federal and  state taxes, using  published 1995 marginal Federal
tax rates and marginal state tax  rates currently available and scheduled to  be
in  effect.  The  tables  incorporate  increased  tax  rates  for  higher-income
taxpayers that were  included in  the Revenue  Reconciliation Act  of 1993.  For
cases  in which more than one state  bracket falls within a Federal bracket, the
highest state bracket is combined with  the Federal bracket. The combined  state
and  Federal tax  brackets shown  reflect the fact  that state  tax payments are
currently deductible for Federal  tax purposes. The  tables illustrate what  you
would  have to  earn on  taxable investments  to equal  the tax-exempt estimated
current return for your  income tax bracket. A  taxpayer's marginal tax rate  is
affected  by both his taxable income and  his adjusted gross income. Locate your
adjusted gross and  your taxable  income (which  is your  adjusted gross  income
reduced by any deductions and exemptions), then locate your tax bracket based on
joint  or single  tax filing.  Read across  to the  equivalent taxable estimated
current return you would need to match the tax-free income.
 
                                       27
<PAGE>
 COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS       STATE AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 39.0 $     0-114.7      17.0   %     5.42    5.72    6.02    6.33    6.63    6.93    7.23    7.53
    39.0- 94.3       0-114.7      32.5         6.67    7.04    7.41    7.78    8.15    8.52    8.89    9.26
                 114.7-172.1      33.0         6.72    7.09    7.46    7.84    8.21    8.58    8.96    9.33
    94.3-143.6       0-114.7      35.0         6.92    7.31    7.69    8.08    8.46    8.85    9.23    9.62
                 114.7-172.1      36.0         7.03    7.42    7.81    8.20    8.59    8.98    9.38    9.77
                 172.1-294.6      38.5         7.32    7.72    8.13    8.54    8.94    9.35    9.76   10.16
   143.6-256.5   114.7-172.1      41.0         7.63    8.05    8.47    8.90    9.32    9.75   10.17   10.59
                 172.1-294.6      44.0         8.04    8.48    8.93    9.38    9.82   10.27   10.71   11.16
                  Over 294.6      41.0   2     7.63    8.05    8.47    8.90    9.32    9.75   10.17   10.59
    Over 256.5   172.1-294.6      47.5         8.57    9.05    9.52   10.00   10.48   10.95   11.43   11.90
                  Over 294.6      44.5   3     8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
</TABLE>
 
  COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS       STATE AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 23.4 $     0-114.7      17.0   %     4.52    5.72    6.02    6.33    6.63    6.93    7.23    7.53
    23.4- 56.6       0-114.7      32.5         6.67    7.04    7.41    7.78    8.15    8.52    8.89    9.26
    56.6-118.0       0-114.7      35.5         6.98    7.36    7.75    8.14    8.53    8.91    9.30    9.69
                 114.7-237.2      37.0         7.14    7.54    7.94    8.33    8.73    9.13    9.52    9.92
   118.0-256.5   114.7-237.2      42.0         7.76    8.19    8.62    9.05    9.48    9.91   10.34   10.78
                  Over 237.2      41.0   2     7.63    8.05    8.47    8.90    9.32    9.75   10.17   10.59
    Over 256.5    Over 237.2      44.5   3     8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
<FN>
------------------
      1 The table reflects the effect of the limitations  on itemized deductions and the deduction for personal exemptions.  They
were  designed to phase out certain benefits of these deductions for higher income taxpayers. These limitations, in effect, raise
the current maximum marginal Federal tax rate to approximately 44.0  percent for taxpayers filing a joint return and entitled  to
four  personal exemptions and to  approximately 41.0 percent for taxpayers  filing a single return  entitled to only one personal
exemption. These limitations are  subject to certain maximums,  which depend on  the number of exemptions  claimed and the  total
amount  of the taxpayer's itemized  deductions. For example, the limitation  on itemized deductions will  not cause a taxpayer to
lose more than 80% of his allowable itemized deductions, with certain exceptions.
      2 Federal tax rate reverts to 36.0% after the 80% cap on the limitation on itemized deductions has been met.
      3 Federal tax rate reverts to 39.6% after the 80% cap on the limitation on itemized deductions has been met.
</TABLE>
 
    A comparison of  tax-free and equivalent  taxable estimated current  returns
with  the returns on various  taxable investments is one  element to consider in
making an  investment  decision.  The Sponsor  may  from  time to  time  in  its
advertising  and sales materials  compare the then  current estimated returns on
the Trust and returns over specified periods on other similar Nuveen Trusts with
returns on taxable investments such as corporate or U.S. Government bonds,  bank
CDs  and  money  market  accounts  or money  market  funds,  each  of  which has
investment characteristics  that  may  differ  from those  of  the  Trust.  U.S.
Government  bonds, for example, are  backed by the full  faith and credit of the
U.S. Government and bank CDs and money market accounts are insured by an  agency
of  the federal government. Money market accounts and money market funds provide
stability of principal, but pay interest  at rates that vary with the  condition
of  the short-term debt market. The  investment characteristics of the Trust are
described more fully elsewhere in this Prospectus.
 
                                       28
<PAGE>
   
NUVEEN TAX-EXEMPT UNIT TRUST
SCHEDULE OF INVESTMENTS AT DATE OF DEPOSIT
AUGUST 23, 1995
NEW JERSEY INSURED TRUST 196
(SERIES 820)
    
 
   
<TABLE>
<CAPTION>
                                                                                          Ratings(3)           Trustee's
                                                                      Optional       ---------------------   Determination
 Aggregate        Name of Issuer and Title of Issue Represented      Redemption       Standard                of Offering
  Principal        by Sponsor's Contracts to Purchase Bonds(1)      Provisions(2)     & Poor's    Moody's      Price(4)
<C>          <C> <S>                                              <C>                <C>         <C>        <C>
---------------------------------------------------------------------------------------------------------------------------
$   500,000      New Jersey Economic Development Authority,          2004 at 102        AAA         Aaa     $       483,100
                   Water Facilities Revenue Refunding Bonds
                   (Hackensack Water Company Project-1994 Series
                   A), 5.80% Due 3/1/24.
    500,000      The Port Authority of New York and New Jersey,      2004 at 101        AAA         Aaa             500,000
                   Consolidated Bonds, Ninety-Fourth Series,
                   6.00% Due 12/1/14.
    500,000      New Jersey Transportation Trust Fund Authority,     2005 at 102        AAA         Aaa             473,970
                   Transportation System Bonds, 1995 Series B,
                   5.50% Due 6/15/15. (Original issue discount
                   bonds will be delivered on or about August
                   24, 1995 at a price of 94.788% of principal
                   amount.)(When issued.)
    500,000      The Delaware River and Bay Authority Revenue        2004 at 102        AAA         Aaa             412,345
                   Bonds (Delaware and New Jersey), Series 1993,
                   4.75% Due 1/1/24. (Original issue discount
                   bonds delivered on or about October 27, 1993
                   at a price of 94.631% of principal amount.)
    500,000      The Essex County Improvement Authority (Essex       2005 at 102        AAA         Aaa             493,040
                   County, New Jersey), County of Essex General
                   Obligation Lease Revenue Bonds, Series 1995
                   (Gibraltar Building Project), 5.95% Due
                   12/1/25.
    500,000      The Board of Education of the Great Meadows         2005 at 102        AAA         Aaa             489,715
                   Regional School District in the County of
                   Warren, New Jersey, School Bonds, 5.90% Due
                   1/15/25. (General Obligation Bonds.)
    500,000      The Pollution Control Financing Authority of        2003 at 102        AAA         Aaa             459,410
                   Salem County (New Jersey), Pollution Control
                   Revenue Refunding Bonds, 1993 Series C
                   (Public Service Electric and Gas Company
                   Project), 5.55% Due 11/1/33.
-----------                                                                                                 ---------------
$ 3,500,000                                                                                                 $     3,311,580
-----------                                                                                                 ---------------
-----------                                                                                                 ---------------
</TABLE>
    
 
See Notes to Schedules of Investments, page 54.
 
                                       29
<PAGE>
   
NEW YORK INSURED TRUST 240
    
 
   
    The Portfolio of New York Insured Trust 240 consists of 8 obligations issued
by  entities located in New York. One Bond  in the Trust is a general obligation
of the governmental entity issuing it and is backed by the taxing power thereof.
Seven Bonds in  the Trust  are payable  as to  principal and  interest from  the
income  of a specific project or authority and are not supported by the issuer's
power to levy  taxes. The  sources of  payment for  these Bonds  are divided  as
follows:  Dedicated-Tax Supported Revenue, 1; College and University Revenue, 2;
Transportation Facility Revenue,  1; Municipal  Lease Revenue,  2; Water  and/or
Sewer  Revenue, 1. All of the  Bonds in the Trust, as  insured, are rated AAA by
Standard & Poor's and Aaa by Moody's.
    
 
   
    At the Date of Deposit,  the average maturity of the  Bonds in the New  York
Insured  Trust is 24.4  years. The average maturity  of the Bonds  in a Trust is
calculated based upon the stated maturities of the Bonds in such Trust (or, with
respect to Bonds for  which funds or  securities have been  placed in escrow  to
redeem such Bonds on a stated call date, based upon such call date). The average
maturity  of the Bonds in a Trust may  increase or decrease from time to time as
Bonds mature or are called or sold.
    
 
   
    Approximately 15.0% of the  aggregate principal amount of  the Bonds in  the
Trust (accounting for approximately 13.4% of the aggregate offering price of the
Bonds)    are   original    issue   discount    bonds.   See    "GENERAL   TRUST
INFORMATION--ORIGINAL ISSUE  DISCOUNT  BONDS  AND STRIPPED  OBLIGATIONS"  for  a
discussion  of the  characteristics of  such bonds  and of  the risks associated
therewith.
    
 
    Approximately 25% of  the aggregate  principal amount  of the  Bonds in  the
Trust  consists of obligations  of issuers whose  revenues are primarily derived
from  payments  to  colleges  and  universities,  including  tuition,  dormitory
revenues, grants and endorsements.
 
    Approximately  27% of  the aggregate  principal amount  of the  Bonds in the
Trust consists of municipal lease obligations.
 
    For a discussion of  the risks associated with  investments in the bonds  of
various issuers, see "General Trust Information" in this section.
 
   
    The  Sponsor entered into contracts to acquire the Bonds on August 22, 1995.
The following summarizes certain information about the Bonds as of the  business
day prior to the Date of Deposit:
    
 
   
<TABLE>
<CAPTION>
                                                                  DIFFERENCE BETWEEN TRUSTEE'S
                                                               DETERMINATION OF OFFERING PRICE AND
   COST TO    PROFIT (OR LOSS)   ANNUAL INTEREST   BID PRICE              THE BID PRICE
   SPONSOR       TO SPONSOR      INCOME TO TRUST    OF BONDS       (AS % OF PRINCIPAL AMOUNT)
  ----------  -----------------  ----------------  ----------  -----------------------------------
  <S>         <C>                <C>               <C>         <C>
  $4,732,372       $31,945           $289,990      $4,740,273                 .48%
</TABLE>
    
 
    Neither   cost  to  Sponsor  nor  profit   (or  loss)  to  Sponsor  reflects
underwriting profits or losses received or  incurred by the Sponsor through  its
participation   in  underwriting  syndicates.  An  underwriter  or  underwriting
syndicate purchases bonds  from the issuer  on a negotiated  or competitive  bid
basis  as principal with  the motive of  marketing such bonds  to investors at a
profit. The Sponsor did not participate as  either the sole underwriter or as  a
manager  or member of a syndicate that  acted as the original underwriter of any
of the Bonds.
 
   
    Unitholders may  elect to  have interest  distributions made  on a  monthly,
quarterly or semi-annual basis. The interest on the Bonds initially deposited in
the  New York Insured Trust, less estimated  expenses, is estimated to accrue at
the rate of $.01557 per Unit per day under the semi-annual plan of distribution,
$.01551 per Unit per  day under the quarterly  plan of distribution and  $.01543
per  Unit per day under the monthly plan of distribution. It is anticipated that
the   amount   of   interest    to   be   distributed    per   Unit   in    each
    
 
                                       30
<PAGE>
year  under each plan  of distribution will initially  be substantially equal to
the Estimated Net Annual Interest Income per Unit for that plan.
 
    Details of interest  distributions per Unit  of the New  York Insured  Trust
under  the various plans appear in the  following table based upon estimated Net
Annual Interest Income at the Date of Deposit:
 
   
<TABLE>
<CAPTION>
                                                                                                          NORMAL
                                                                                                      DISTRIBUTIONS
NEW YORK INSURED TRUST                            1995                             1996                  PER YEAR
<S>                                     <C>            <C>            <C>            <C>            <C>
----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
--------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5863(1)                                                  $  5.5551
                                                          --------  $.4629 every month  --------
Quarterly Distribution Plan...........  $   .5863(1)   $   .4653(2)   $  1.3959      $  1.3959        $  5.5871
Semi-Annual Distribution Plan.........  $   .5863(1)   $   .4671(3)                  $  2.8026        $  5.6061
--------------------------------------------------------------------------------------------------------------------
<FN>
 * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May  1,
   August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1)  The first distribution will be paid to all Unitholders,  regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The  second distribution  under the  quarterly  distribution plan  represents a  1-month distribution;  subsequent  quarterly
    distributions will be regular 3-month distributions.
(3)  The second distribution  under the semi-annual distribution  plan represents a  1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
    The accrual amounts set forth above, and  in turn the amount of interest  to
be  distributed annually per Unit, will  generally change as Bonds are redeemed,
mature or are sold or as fees and expenses increase or decrease.
 
TAX STATUS--NEW YORK INSURED TRUST
 
    For a discussion  of the Federal  tax status  of income earned  on New  York
Insured Trust Units, see Section 11.
 
    In  the opinion of Edwards & Angell,  special counsel for the Series for New
York tax matters, under existing law:
 
        Interest  on  obligations  issued  by   New  York  State,  a   political
    subdivision  thereof, Puerto  Rico, the  Virgin Islands,  Guam, the Northern
    Mariana Islands,  or  other possessions  of  the United  States  within  the
    meaning  of Section 103(c) of the Internal  Revenue Code of 1986, as amended
    ("New York Obligations"), which would be  exempt from New York State or  New
    York  City personal  income tax if  directly received by  a Unitholder, will
    retain its  status as  tax-exempt interest  when received  by the  New  York
    Insured Trust (the "Trust") and distributed to such Unitholder.
 
        Interest  (less amortizable premium, if any) derived from the Trust by a
    resident of New  York State  (or New York  City) in  respect of  obligations
    issued  by states other than New York (or their political subdivisions) will
    be subject to New York State (or New York City) personal income tax.
 
        A Unitholder who is a resident of New York State (or New York City) will
    be subject to New  York State (or  New York City)  personal income tax  with
    respect  to gains realized  when New York  Obligations held in  the New York
    Insured  Trust  are  sold,  redeemed  or  paid  at  maturity  or  when   the
    Unitholder's  Units are sold or redeemed;  such gain will equal the proceeds
    of sale, redemption or payment less the tax basis of the New York Obligation
    or Unit (adjusted to reflect (a) the amortization of premium or discount, if
    any, on New York Obligations held  by the Trust, (b) accrued original  issue
    discount,  with respect to each  New York Obligation which,  at the time the
    New York Obligation  was issued, had  original issue discount,  and (c)  the
    deposit of New York Obligations with accrued interest in the Trust after the
    Unitholder's settlement date).
 
                                       31
<PAGE>
        Interest  or gain from  the Trust derived  by a Unitholder  who is not a
    resident of New York  State (or New  York City) will not  be subject to  New
    York  State (or  New York  City) personal income  tax, unless  the Units are
    property employed in a business, trade, profession or occupation carried  on
    in New York State (or New York City).
 
        In  the case  of the  Trust, amounts  paid under  the insurance policies
    representing maturing interest on defaulted New York Obligations held by the
    Trustee in the Trust  will be excludable  from New York  State and New  York
    City  income if, and  to the same  extent as, such  interest would have been
    excludable if paid by the respective issuer.
 
        For purposes of the New  York State and New  York City franchise tax  on
    corporations,  Unitholders which are subject to such tax will be required to
    include in their entire net income any interest or gains distributed to them
    even  though  distributed  in  respect  of  obligations  of  any  state   or
    subdivision thereof including New York.
 
        If borrowed funds are used to purchase Units in the Trust, all (or part)
    of  the interest on  such indebtedness will  not be deductible  for New York
    State and  New  York  City  tax  purposes. The  purchase  of  Units  may  be
    considered  to have been made with borrowed funds even though such funds are
    not directly traceable to the purchase of Units in any New York Trust.
 
ECONOMIC FACTORS--NEW YORK
 
    The Portfolio of the New York  Insured Trust includes obligations issued  by
New  York State  (the "State"), by  its various public  bodies (the "Agencies"),
and/or by other  entities located within  the State, including  the City of  New
York (the "City").
 
    Some of the more significant events and conditions relating to the financial
situation  in New York are summarized below.  This section provides only a brief
summary of the complex factors affecting the financial situation in New York and
is derived  from  sources that  are  generally  available to  investors  and  is
believed  to  be  accurate. It  is  based  in part  on  Official  Statements and
prospectuses issued by, and on other information reported by the State, the City
and the Agencies in connection with the issuance of their respective securities.
 
    There can  be no  assurance that  current or  future statewide  or  regional
economic  difficulties, and  the resulting impact  on State  or local government
finances generally,  will not  adversely affect  the market  value of  New  York
Municipal  Obligations held  in the  portfolio of  the Trust  or the  ability of
particular obligors to make timely payments of debt service on (or relating  to)
those obligations.
 
    (1)  THE STATE: The State has historically been one of the wealthiest states
in the nation.  For decades, however,  the State economy  has grown more  slowly
than  that of  the nation  as a  whole, gradually  eroding the  State's relative
economic  affluence.  Statewide,  urban  centers  have  experienced  significant
changes involving migration of the more affluent to the suburbs and an influx of
generally  less affluent residents. Regionally,  the older Northeast cities have
suffered because of the relative success that the South and the West have had in
attracting  people  and  business.  The  City  has  also  had  to  face  greater
competition  as  other  major  cities  have  developed  financial  and  business
capabilities  which  make  them  less  dependent  on  the  specialized  services
traditionally available almost exclusively in the City.
 
    The  State has  for many years  had a very  high state and  local tax burden
relative to other states. The burden of State and local taxation, in combination
with the many other causes of regional economic dislocation, has contributed  to
the  decisions of  some businesses and  individuals to relocate  outside, or not
locate within, the State.
 
    SLOWDOWN OF REGIONAL  ECONOMY. A national  recession commenced in  mid-1990.
The  downturn  continued  throughout the  State's  1990-91 fiscal  year  and was
followed by a period
 
                                       32
<PAGE>
of weak economic growth during the  1991 calendar year. For calendar year  1992,
the national economy continued to recover, although at a rate below all post-war
recoveries.  For calendar year 1993,  the economy grew faster  than in 1992, but
still at  a  very moderate  rate,  as  compared to  other  recoveries.  Moderate
economic  growth continued  in calendar year  1994. The State  has projected the
rate of economic growth to slow within New York during 1995, as the expansion of
the national economy moderates. Economic recovery started considerably later  in
the  State  than  in the  nation  as a  whole  due  in part  to  the significant
retrenchment in the  banking and  financial services  industries, downsizing  by
several  major corporations, cutbacks in defense  spending, and an oversupply of
office buildings. Many uncertainties exist in forecasts of both the national and
State economies  and there  can be  no  assurance that  the State  economy  will
perform  at a level sufficient  to meet the State's  projections of receipts and
disbursements.
 
    1995-96 FISCAL YEAR.   The Governor issued a  proposed Executive Budget  for
the  1995-96  fiscal year  (the "Proposed  Budget") on  February 1,  1995, which
projected a  balanced  general fund  and  receipts and  disbursements  of  $32.5
billion  and  $32.4  billion,  respectively.  As  of  May  29,  1995,  the State
legislature had  not yet  enacted,  nor had  the  Governor and  the  legislature
reached  an agreement on, the budget for the 1995-96 fiscal year which commenced
on April 1, 1995. The delay in the enactment of the budget may negatively affect
certain proposed actions and reduce projected savings.
 
    The Proposed Budget and the 1995-96  Financial Plan provide for the  closing
of  a  projected  $4.7  billion  budget  gap  in  the  1995-96  fiscal  year  by
cost-containment savings in social welfare  programs, savings from State  agency
restructurings,  freezing  the level  of some  categories of  local aid  and new
revenue measures.
 
    The State's proposed budget and the 1995-96 Plan may be impacted  negatively
by  uncertainties relating to  the economy and  tax collections, although recent
signs of improvement in the national economy could lead to short-term  increases
in State receipts.
 
    1994-1995  FISCAL YEAR.   The State Legislature  enacted the State's 1994-95
fiscal year budget on June 7, 1994, more than two months after the start of that
fiscal year. As of  February 1, 1995, the  updated 1994-95 State Financial  Plan
(the  "Plan") projected total  general fund receipts  and disbursements of $33.3
billion and $33.5 billion, respectively, representing reductions in receipts and
disbursements of $1 billion and $743 million, respectively, from the amount  set
forth  in the 1994-95 budget.  The Plan projected for  a General Fund balance of
approximately $157 million at the close of the 1994-95 fiscal year.
 
    1993-94 FISCAL  YEAR.   The State  ended  the 1993-94  fiscal year  with  an
operating surplus of approximately $1.0 billion.
 
    FUTURE  FISCAL YEARS. There can be no assurance that the State will not face
substantial potential budget  gaps in  the future resulting  from a  significant
disparity  between tax revenues  projected from a  lower recurring receipts base
and the  spending required  to maintain  State programs  at current  levels.  To
address   any  potential  budgetary  imbalance,  the  State  may  need  to  take
significant actions to align recurring receipts and disbursements.
 
    INDEBTEDNESS. As of  March 31,  1994, the  total amount  of long-term  State
general obligation debt authorized but unissued stood at $2.0 billion. As of the
same  date, the State had approximately $5.4 billion in general obligation bonds
including $224 million of Bond Anticipation Notes outstanding.
 
    The State  originally projected  that its  borrowings for  capital  purposes
during  the State's 1994-95 fiscal year would consist of $374 million in general
obligation bonds  and  bond  anticipation  notes and  $140  million  in  general
obligation  commercial paper. The Legislature has  authorized the issuance of up
to $69 million in certificates of participation in pools of leases for equipment
and  real  property  to  be  utilized  by  State  agencies.  Through  March  15,
 
                                       33
<PAGE>
1995,  the State had issued in excess  of $590 million of its general obligation
bonds (including $430 million of refunding bonds). The projections of the  State
regarding  its borrowings for  any fiscal year  are subject to  change if actual
receipts fall short of State projections or if other circumstances require.
 
    In  June  1990,  legislation  was  enacted  creating  the  "New  York  Local
Government  Assistance  Corporation"  ("LGAC"),  a  public  benefit  corporation
empowered to  issue long-term  obligations  to fund  certain payments  to  local
governments  traditionally funded through the State's annual seasonal borrowing.
As of March 31, 1994, LGAC has issued its bonds to provide net proceeds of  $4.5
billion. The LGAC was authorized to provide net proceeds of $315 million, during
the  State's 1994-95 fiscal year. The LGAC issued $347 million of bonds on March
1, 1995 providing the authorized net proceeds.
 
    Financing of capital programs  by other public authorities  of the State  is
also   obtained   from  lease-purchase   and   contractual-obligation  financing
arrangements, the debt service for which  is paid from State appropriations.  As
of March 31, 1994, there were $16.6 billion of such other financing arrangements
outstanding  and additional financings of this  nature by public authorities are
projected to total  $2.4 billion during  the 1994-95 fiscal  year. In  addition,
certain agencies had issued and outstanding approximately $7.3 billion of "moral
obligation financings" as of March 31, 1994, which are to be repaid from project
revenues.  While there has never been a  default on moral obligation debt of the
State, the State would be required to make up any shortfall in debt service.
 
    RATINGS.  The $850 million in TRANS  issued by the State in April 1993  were
rated  SP-1-Plus by S&P and MIG-1 by Moody's which represent the highest ratings
given by such agencies and the first time the State's TRANS have received  these
ratings  since  its May  1989 TRANS  issuance. Both  agencies cited  the State's
improved fiscal position as a significant  factor in the upgrading of the  April
1993 TRANS.
 
    Moody's  rating  of  the State's  general  obligation  bonds stood  at  A on
February 28, 1994,  and S&P's  rating stood  at A-  with a  positive outlook  on
February  28, 1994,  an improvement  from S&P's  stable outlook  from April 1993
through February  1994 and  negative outlook  prior to  April 1993.  Previously,
Moody's lowered its rating to A on June 6, 1990, its rating having been A1 since
May  27, 1986. S&P  lowered its rating from  A to A- on  January 13, 1992. S&P's
previous ratings were A from March 1990 to January 1992, AA- from August 1987 to
March 1990 and A+ from November 1982 to August 1987.
 
    Moody's maintained  its  A  rating  and  S&P  continued  its  A-  rating  in
connection  with the State's issuance of  $537 million of its general obligation
bonds in March 1995.
 
    (2) THE  CITY AND  THE MUNICIPAL  ASSISTANCE CORPORATION  ("MAC"): The  City
accounts  for approximately 40%  of the State's  population and personal income,
and the City's financial health affects the State in numerous ways.
 
    In response to the City's fiscal crisis in 1975, the State took a number  of
steps  to assist the City in returning to fiscal stability. Among other actions,
the State Legislature (i) created MAC to assist with long-term financing for the
City's short-term debt and  other cash requirements and  (ii) created the  State
Financial  Control Board (the "Control Board")  to review and approve the City's
budgets and City four-year  financial plans (the financial  plans also apply  to
certain City-related public agencies (the "Covered Organizations")).
 
    In   recent  years,  the  rate  of   economic  growth  in  the  City  slowed
substantially as the City's economy entered a recession. While by some  measures
the  City's economy may  have begun to  recover, a number  of factors, including
poor performance  by the  City's  financial services  companies, may  prevent  a
significant improvement in the City's economy and may
 
                                       34
<PAGE>
in fact negatively impact upon the City's finances by reducing tax receipts. The
City  Comptroller has issued reports concluding that the recession of the City's
economy may  be  ending,  but  there  is  little  prospect  of  any  significant
improvement in the near term.
 
    FISCAL  YEAR 1996 AND THE  1995-1998 FINANCIAL PLAN.   On February 14, 1995,
the Mayor released his  preliminary $30.5 billion budget  for fiscal year  1996,
which  included $2.7 billion of deficit reduction measures. The Mayor is seeking
a $1.2 billion reduction in mandated welfare and Medicaid expenditures from  the
State,  a $569 million reduction in expenditures  by city agencies and the Board
of Education budget, $600  million in personnel  related savings partly  through
the elimination of 15,000 jobs within 18 months, and other measures.
 
    The  1995-1998  Financial  Plan (the  "Plan"),  which was  submitted  to the
Control Board on February  23, 1995, projected budget  gaps of $3.2 billion  and
$3.8  billion for fiscal years 1997 and 1998, respectively. The City Comptroller
warned on March 7, 1995 that the budget gap for fiscal year 1996 could  increase
by  $500 million to as much as $3.2 billion. The Control Board reported on March
17, 1995 that the proposed budget for  fiscal year 1996 relies heavily on  risky
assumptions  such as $600 million  in savings to be  negotiated with City unions
and $1.4 billion in savings dependent on State legislative approval.
 
    The City  successfully negotiated  concessions with  a number  of unions  in
order  to ensure that the fiscal year 1995 budget remained in balance. The Mayor
has indicated that to avoid additional lay-offs, higher than the number referred
to above, reductions will be necessary in the benefit plans of City employees to
close the budget gaps for fiscal years 1996 and thereafter. Union leadership has
publicly opposed such "givebacks". With respect to fiscal year 1995 the City was
also successful in obtaining additional  funds and relief from certain  mandated
expenditures  from the State for  various programs, including Medicaid. However,
the amount of gap closing measures requiring State action set forth in the  Plan
is  well in excess of proposed assistance to the City outlined in the Governor's
Proposed Budget.
 
    The Mayor has directed City agencies to identify an additional $300  million
in  cuts for fiscal  year 1996 because  of anticipated shortfalls  of as much as
$500 million in State aid and budgetary actions. An extended delay by the  State
in  adopting its  1995-96 fiscal  year budget  would negatively  impact upon the
City's financial condition  and ability to  close budget gaps  for fiscal  years
1996 and thereafter.
 
    Given  the foregoing factors, there  can be no assurance  that the City will
continue to  maintain a  balanced budget,  or that  it can  maintain a  balanced
budget  without additional tax or other  revenue increases or reductions in City
services, which could adversely affect the City's economic base.
 
    Pursuant to State law, the City prepares a four-year annual financial  plan,
which is reviewed and revised on a quarterly basis and which includes the City's
capital,  revenue and  expense projections. The  City is required  to submit its
financial plans to review bodies, including the Control Board. If the City  were
to  experience certain adverse financial circumstances, including the occurrence
or the  substantial likelihood  and imminence  of the  occurrence of  an  annual
operating  deficit of more than $100 million or the loss of access to the public
credit  markets  to   satisfy  the   City's  capital   and  seasonal   financial
requirements,  the  Control Board  would be  required by  State law  to exercise
certain powers,  including  prior approval  of  City financial  plans,  proposed
borrowings and certain contracts.
 
    The  City depends  on the  State for State  aid both  to enable  the City to
balance its budget and to meet  its cash requirements. If the State  experiences
revenue  shortfalls  or spending  increases  beyond its  projections  during its
1995-96 fiscal  year or  subsequent  years, such  developments could  result  in
reductions  in projected  State aid to  the City.  In addition, there  can be no
assurance that  State budgets  in the  1996-97 or  future fiscal  years will  be
adopted
 
                                       35
<PAGE>
by  the April 1 statutory deadline and that there will not be adverse effects on
the City's  cash flow  and additional  City  expenditures as  a result  of  such
delays.
 
    The  City projections set forth in the Plan are based on various assumptions
and contingencies which are uncertain and which may not materialize. Changes  in
major  assumptions could significantly affect the  City's ability to balance its
budget as required by State law and  to meet its annual cash flow and  financing
requirements.  Such  assumptions and  contingencies  include the  timing  of any
regional and local economic recovery, the absence of wage increases in excess of
the increases assumed  in its  financial plan, employment  growth, provision  of
State  and Federal aid and mandate  relief, State legislative approval of future
State budgets, levels of education expenditures as may be required by State law,
adoption of future City budgets  by the New York  City Council, and approval  by
the Governor or the State Legislature and the cooperation of MAC with respect to
various other actions proposed in the Plan.
 
    The  City's ability to maintain a  balanced operating budget is dependant on
whether it  can implement  necessary service  and personnel  reduction  programs
successfully.  As discussed above, the City must identify additional expenditure
reductions and revenue sources to achieve balanced operating budgets for  fiscal
years  1996 and  thereafter. Any  such proposed  expenditure reductions  will be
difficult to implement  because of  their size and  the substantial  expenditure
reductions already imposed on City operations in the past two years.
 
    Attaining  a balanced  budget is also  dependent upon the  City's ability to
market its  securities successfully  in the  public credit  markets. The  City's
financing  program  for  fiscal  years 1995  through  1998  contemplates capital
spending of $16.4  billion, which  will be  financed through  issuance of  $10.7
billion  of general  obligation bonds  and the  balance through  Water Authority
Revenue Bonds  and  Covered  Organization  obligations,  and  will  be  utilized
primarily to reconstruct and rehabilitate the City's infrastructure and physical
assets  and  to make  capital investments.  A significant  portion of  such bond
financing is used to reimburse the City's general fund for capital  expenditures
already  incurred. In  addition, the  City issues  revenue and  tax anticipation
notes to  finance  its seasonal  working  capital requirements.  The  terms  and
success  of projected  public sales of  City general obligation  bonds and notes
will be subject to prevailing market conditions at the time of the sale, and  no
assurance can be given that the credit markets will absorb the projected amounts
of  public bond and note sales.  In addition, future developments concerning the
City and public  discussion of  such developments, the  City's future  financial
needs  and  other issues  may  affect the  market  for outstanding  City general
obligation bonds  and  notes.  If the  City  were  unable to  sell  its  general
obligation  bonds  and notes,  it would  be prevented  from meeting  its planned
operating and capital expenditures.
 
    FISCAL YEAR 1995.  New York City adopted its fiscal year 1995 budget on June
21, 1994, which provided for spending of  $31.6 billion and closed a budget  gap
of  $2.3 billion.  However, following adoption  of the fiscal  year 1995 budget,
additional unexpected  budget  gaps  totaling approximately  $2.0  billion  were
identified.  The widening of the  budget gap for fiscal  year 1995 resulted from
shortfalls in tax revenues  and State and  federal aid. The  Mayor and the  City
Council  were unable to reach agreement on additional cuts proposed by the Mayor
in October 1994. The City Council passed its own budget cut proposal in November
1994. The Mayor vetoed the City  Council version, the City Council overrode  his
veto and the Mayor implemented his original plan. A state court held in December
1994  that  neither budget  cut proposal  could be  implemented. The  Mayor then
elected not to spend certain funds in order to keep the budget in balance.
 
    FISCAL YEARS  1990  THROUGH 1994.    The City  achieved  balanced  operating
results  as reported in accordance  with GAAP for its  fiscal years 1990 through
1994. The City was
 
                                       36
<PAGE>
required to close  substantial budget  gaps in  these fiscal  years to  maintain
balanced operating results.
 
    The City is a defendant in a significant number of lawsuits. Such litigation
includes,  but is not limited to,  actions commenced and claims asserted against
the City arising out  of alleged constitutional  violations, torts, breaches  of
contracts,  and other violations of law  and condemnation proceedings. While the
ultimate outcome and fiscal  impact, if any, on  the proceedings and claims  are
not  currently predictable, adverse determinations in certain of them might have
a material adverse  effect upon the  City's ability to  carry out its  financial
plan.  As of June 30, 1994, the City estimated its potential future liability to
be $2.6 billion.
 
    On January  30, 1995,  Robert L.  Schulz and  other defendants  commenced  a
federal district court action seeking among other matters to cancel the issuance
on January 31, 1995 of $659 million of City bonds. While the federal courts have
rejected  requests for temporary  restraining orders and  expedited appeals, the
case is still pending. The City has indicated that it believes the action to  be
without merit as it relates to the City, but there can be no assurance as to the
outcome  of the litigation and an adverse  ruling or the granting of a permanent
injunction would have a  negative impact on the  City's financial condition  and
its ability to fund its operations.
 
    RATINGS.   As of the  date of this prospectus,  Moody's rating of the City's
general obligation  bonds stood  at Baa1  and  S&P's rating  stood at  BBB+.  On
February  11, 1991,  Moody's had  lowered its rating  from A.  S&P's lowered its
rating from A-  on July  10, 1995  after placing  the City  on "negative  credit
watch" in January 1995.
 
    On  March 13, 1995, Moody's  confirmed its Baa1 rating  in connection with a
scheduled March  1995 sale  of $795  million of  the City's  general  obligation
bonds.
 
    In  dropping  the City's  rating in  July 1995,  S&P's cited  the "sluggish"
economy and the poor  outlook for job  growth, as well as  the continued use  of
"one-time  measures" to close budget gaps. The lowered rating could increase the
City's borrowing costs by forcing it to offer higher interest rates on its bonds
thereby adding further pressures to the City's budget problems. In addition, the
lowered rating may prevent certain  institutional investors from purchasing  the
City's  bonds reducing demand  for future offerings, which  could also force the
City to increase interest rates on its bonds.
 
    On October 12, 1993, Moody's increased its rating of the City's issuance  of
$650  million of Tax Anticipation  Notes ("TANs") to MIG-1  from MIG-2. Prior to
that date, on May  9, 1990, Moody's revised  downward its rating on  outstanding
City  revenue anticipation notes from MIG-1 to  MIG-2 and rated the $900 million
Notes then  being  sold MIG-2.  S&P's  rating of  the  October 1993  TANS  issue
increased  to SP-1 from SP-2. Prior to that date, on April 29, 1991, S&P revised
downward its rating on City revenue anticipation notes from SP-1 to SP-2.
 
    As of December 31, 1994, the  City and MAC had, respectively, $22.5  billion
and $4.1 billion of outstanding net long-term indebtedness.
 
    (3) THE STATE AGENCIES: Certain Agencies of the State have faced substantial
financial difficulties which could adversely affect the ability of such Agencies
to  make payments  of interest  on, and  principal amounts  of, their respective
bonds. The  difficulties  have in  certain  instances caused  the  State  (under
so-called   "moral  obligation"  provisions   which  are  non-binding  statutory
provisions for State  appropriations to  maintain various  debt service  reserve
funds)  to appropriate funds on behalf of the Agencies. Moreover, it is expected
that the  problems  faced by  these  Agencies  will continue  and  will  require
increasing  amounts of State assistance in future years. Failure of the State to
appropriate necessary amounts or to take  other action to permit those  Agencies
having  financial  difficulties  to meet  their  obligations could  result  in a
default  by  one  or  more  of  the  Agencies.  Such  default,  if  it  were  to
 
                                       37
<PAGE>
occur,  would  be  likely  to  have a  significant  adverse  effect  on investor
confidence in, and therefore the market price of, obligations of the  defaulting
Agencies.  In addition, any default in payment  on any general obligation of any
Agency whose  bonds contain  a  moral obligation  provision could  constitute  a
failure  of certain conditions that must be satisfied in connection with Federal
guarantees of City  and MAC  obligations and  could thus  jeopardize the  City's
long-term financing plans.
 
    As  of  September 30,  1993,  the State  reported  that there  were eighteen
Agencies that each had outstanding debt of $100 million or more and an aggregate
of $63.5  billion  of  outstanding  debt, some  of  which  was  state-supported,
state-related debt.
 
    (4) STATE LITIGATION: The State is a defendant in numerous legal proceedings
pertaining  to  matters incidental  to the  performance of  routine governmental
operations. Such litigation  includes, but  is not limited  to, claims  asserted
against  the State  arising from alleged  torts, alleged  breaches of contracts,
condemnation proceedings and other alleged violations of State and Federal laws.
Included in the State's outstanding litigation are a number of cases challenging
the constitutionality  or  the  adequacy  and  effectiveness  of  a  variety  of
significant  social  welfare  programs primarily  involving  the  State's mental
hygiene programs. Adverse judgments in  these matters generally could result  in
injunctive  relief coupled with prospective changes  in patient care which could
require substantial increased financing of the litigated programs in the future.
 
    The State  is  also engaged  in  a  variety of  claims  wherein  significant
monetary  damages are sought. Actions commenced  by several Indian nations claim
that significant amounts of land were unconstitutionally taken from the  Indians
in  violation  of  various treaties  and  agreements during  the  eighteenth and
nineteenth centuries. The claimants seek  recovery of approximately six  million
acres of land as well as compensatory and punitive damages.
 
    The   State  has  entered   into  a  settlement   agreement  with  Delaware,
Massachusetts and all other parties with  respect to STATE OF DELAWARE V.  STATE
OF  NEW  YORK, an  action  by Delaware  and  other states  to  recover unclaimed
property from New York-based brokers, which has escheated to the State  pursuant
to  its ABANDONED  PROPERTY LAW. Annual  payments under this  settlement will be
made through the  State's 2002-03  fiscal year  in amounts  not exceeding  $48.4
million in any fiscal year subsequent to the State's 1994-95 fiscal year.
 
    In  SCHULZ V.  STATE OF  NEW YORK, commenced  May 24,  1993 ("SCHULZ 1993"),
petitioners have challenged the constitutionality of mass transportation bonding
programs  of  the  New  York  State  Thruway  Authority  and  the   Metropolitan
Transportation  Authority. On  May 24, 1993,  the Supreme  Court, Albany County,
temporarily enjoined the State from implementing those bonding programs.
 
    Petitioners in SCHULZ asserted that issuance of bonds by the two Authorities
is subject to approval  by statewide referendum. By  decision dated October  21,
1993,  the  Appellate  Division, Third  Department,  affirmed the  order  of the
Supreme Court, Albany County, granting the State's motion for summary  judgment,
dismissing  the complaint and vacating the  temporary restraining order. On June
30, 1994, the Court of Appeals, the State's highest court, upheld the  decisions
of  the Supreme Court  and Appellate Division in  SCHULZ, Plaintiffs' motion for
reargument was denied by  the Court of  Appeals on September  1, 1994 and  their
writ of certiorari to the U.S. Supreme Court was denied on January 23, 1995.
 
    Adverse  developments in the foregoing  proceedings or new proceedings could
adversely affect the financial condition of the State in the future.
 
    (5) OTHER MUNICIPALITIES: Certain  localities in addition  to New York  City
could   have  financial  problems  leading  to  requests  for  additional  State
assistance. The potential impact on the  State of such actions by localities  is
not  included in projections  of State receipts and  expenditures in the State's
1994-95 fiscal years.
 
                                       38
<PAGE>
    Fiscal difficulties experienced by the City of Yonkers ("Yonkers")  resulted
in  the creation  of the Financial  Control Board  for the City  of Yonkers (the
"Yonkers Board")  by  the State  in  1984. The  Yonkers  Board is  charged  with
oversight of the fiscal affairs of Yonkers. Future actions taken by the Governor
or  the State Legislature to assist Yonkers  could result in allocation of State
resources in amounts that cannot yet be determined.
 
    Municipalities and school districts  have engaged in substantial  short-term
and  long-term borrowings. In 1992, the  total indebtedness of all localities in
the State was approximately  $35.2 billion, of which  $19.5 billion was debt  of
New  York City  (excluding $5.9  billion in  MAC debt).  State law  requires the
Comptroller to review and make  recommendations concerning the budgets of  those
local government units other than New York City authorized by State law to issue
debt  to  finance deficits  during  the period  that  such deficit  financing is
outstanding.  Seventeen  localities  had  outstanding  indebtedness  for   state
financing at the close of their fiscal year ending in 1992.
 
    Certain  proposed Federal  expenditure reductions  could reduce,  or in some
cases eliminate, Federal funding  of some local  programs and accordingly  might
impose substantial increased expenditure requirements on affected localities. If
the State, New York City or any of the Agencies were to suffer serious financial
difficulties  jeopardizing their respective access to the public credit markets,
the marketability of  notes and  bonds issued  by localities  within the  State,
including  notes or  bonds in  the New  York Insured  Trust, could  be adversely
affected. Localities also face anticipated and potential problems resulting from
certain pending litigation, judicial decisions, and long-range economic  trends.
The  longer-range potential  problems of declining  urban population, increasing
expenditures, and other  economic trends could  adversely affect localities  and
require increasing State assistance in the future.
 
    (6)  OTHER ISSUERS OF NEW YORK MUNICIPAL  OBLIGATIONS. There are a number of
other agencies, instrumentalities and political  subdivisions of the State  that
issue  Municipal Obligations, some  of which may  be conduit revenue obligations
payable from  payments from  private borrowers.  These entities  are subject  to
various  economic  risks  and  uncertainties,  and  the  credit  quality  of the
securities issued  by them  may vary  considerably from  the credit  quality  of
obligations backed by the full faith and credit of the State.
 
                                       39
<PAGE>
NEW YORK TAXABLE ESTIMATED CURRENT RETURN TABLE
 
    The  following tables show the approximate taxable estimated current returns
for individuals  that are  equivalent to  tax-exempt estimated  current  returns
under  combined Federal,  state and local  taxes, using  published 1995 marginal
Federal tax rates and marginal state and local tax rates currently available and
scheduled to  be in  effect.  The tables  incorporate  increased tax  rates  for
higher-income  taxpayers that were included in the Revenue Reconciliation Act of
1993. For cases  in which  two state  or local  brackets fall  within a  federal
bracket, the higher state or local bracket is combined with the federal bracket.
The  combined local, state and Federal tax  brackets shown reflect the fact that
state and local tax payments are currently deductible for Federal tax  purposes.
The  tables illustrate  what you  would have to  earn on  taxable investments to
equal the tax-exempt  estimated current return  for your income  tax bracket.  A
taxpayer's  marginal tax  rate is  affected by both  his taxable  income and his
adjusted gross income. Locate your adjusted gross and your taxable income (which
is your adjusted gross  income reduced by any  deductions and exemptions),  then
locate  your tax bracket based on joint or single tax filing. Read across to the
equivalent taxable estimated current return you would need to match the tax-free
income.
 
I.  COMBINED FEDERAL AND NEW YORK STATE INCOME TAXES
 
 COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS       STATE AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%   6.50%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 39.0 $     0-100.0     21.5    %     6.05    6.37    6.69    7.01    7.32    7.64    7.96    8.28
                 100.0-114.7     22.5          6.13    6.45    6.77    7.10    7.42    7.74    8.06    8.39
    39.0- 94.3       0-100.0     33.5          7.14    7.52    7.89    8.27    8.65    9.02    9.40    9.77
                 100.0-114.7     34.5          7.25    7.63    8.02    8.40    8.78    9.16    9.54    9.92
                 114.7-150.0     35.0          7.31    7.69    8.08    8.46    8.85    9.23    9.62   10.00
                 150.0-172.1     34.0          7.20    7.58    7.95    8.33    8.71    9.09    9.47    9.85
    94.3-143.6       0-100.0     36.0          7.42    7.81    8.20    8.59    8.98    9.38    9.77   10.16
                 100.0-114.7     37.0          7.54    7.94    8.33    8.73    9.13    9.52    9.92   10.32
                 114.7-150.0     38.0          7.66    8.06    8.47    8.87    9.27    9.68   10.08   10.48
                 150.0-172.1     37.0          7.54    7.94    8.33    8.73    9.13    9.52    9.92   10.32
                 172.1-294.6     39.5          7.85    8.26    8.68    9.09    9.50    9.92   10.33   10.74
   143.6-256.5   114.7-150.0     42.5          8.26    8.70    9.13    9.57   10.00   10.43   10.87   11.30
                 150.0-172.1     42.0          8.19    8.62    9.05    9.48    9.91   10.34   10.78   11.21
                 172.1-294.6     44.5          8.56    9.01    9.46    9.91   10.36   10.81   11.26   11.71
                  Over 294.6     42.0    2     8.19    8.62    9.05    9.48    9.91   10.34   10.78   11.21
    Over 256.5   172.1-294.6     48.0          9.13    9.62   10.10   10.58   11.06   11.54   12.02   12.50
                  Over 294.6     45.5    3     8.72    9.17    9.63   10.09   10.55   11.01   11.47   11.93
</TABLE>
 
  COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS       STATE AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%   6.50%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 23.4 $     0-100.0     21.5    %     6.05    6.37    6.69    7.01    7.32    7.64    7.96    8.28
                 100.0-114.7     22.0          6.09    6.41    6.73    7.05    7.37    7.69    8.01    8.33
    23.4- 56.6       0-100.0     33.5          7.14    7.52    7.89    8.27    8.65    9.02    9.40    9.77
                 100.0-114.7     34.0          7.20    7.58    7.95    8.33    8.71    9.09    9.47    9.85
    56.6-118.0       0-100.0     36.0          7.42    7.81    8.20    8.59    8.98    9.38    9.77   10.16
                 100.0-114.7     36.5          7.48    7.87    8.27    8.66    9.06    9.45    9.84   10.24
                 114.7-150.0     38.0          7.66    8.06    8.47    8.87    9.27    9.68   10.08   10.48
                 150.0-237.2     37.5          7.60    8.00    8.40    8.80    9.20    9.60   10.00   10.40
   118.0-256.5   114.7-150.0     43.0          8.33    8.77    9.21    9.65   10.09   10.53   10.96   11.40
                 150.0-237.2     42.5          8.26    8.70    9.13    9.57   10.00   10.43   10.87   11.30
                  Over 237.2     42.0    2     8.19    8.62    9.05    9.48    9.91   10.34   10.78   11.21
    Over 256.5    Over 237.2     45.5    3     8.72    9.17    9.63   10.09   10.55   11.01   11.47   11.93
</TABLE>
 
                                       40
<PAGE>
II. COMBINED FEDERAL, NEW YORK STATE AND NEW YORK CITY INCOME TAXES
 
 COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL      COMBINED
    FEDERAL      ADJUSTED       STATE,
    TAXABLE        GROSS         LOCAL                     TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME      AND FEDERAL     --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%   6.50%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 39.0 $     0-100.0     25.0    %     6.33    6.67    7.00    7.33    7.67    8.00    8.33    8.67
                 100.0-114.7     26.0          6.42    6.76    7.09    7.43    7.77    8.11    8.45    8.78
    39.0- 94.3       0-100.0     36.5          7.48    7.87    8.27    8.66    9.06    9.45    9.84   10.24
                 100.0-114.7     37.5          7.60    8.00    8.40    8.80    9.20    9.60   10.00   10.40
                 114.7-150.0     38.0          7.66    8.06    8.47    8.87    9.27    9.68   10.08   10.48
                 150.0-172.1     37.5          7.60    8.00    8.40    8.80    9.20    9.60   10.00   10.40
    94.3-143.6       0-100.0     39.5          7.85    8.26    8.68    9.09    9.50    9.92   10.33   10.74
                 100.0-114.7     40.0          7.92    8.33    8.75    9.17    9.58   10.00   10.42   10.83
                 114.7-150.0     41.0          8.05    8.47    8.90    9.32    9.75   10.17   10.59   11.02
                 150.0-172.1     40.0          7.92    8.33    8.75    9.17    9.58   10.00   10.42   10.83
                 172.1-294.6     42.5          8.26    8.70    9.13    9.57   10.00   10.43   10.87   11.30
   143.6-256.5   114.7-150.0     45.5          8.72    9.17    9.63   10.09   10.55   11.01   11.47   11.93
                 150.0-172.1     44.5          8.56    9.01    9.46    9.91   10.36   10.81   11.26   11.71
                 172.1-294.6     47.0          8.96    9.43    9.91   10.38   10.85   11.32   11.79   12.26
                  Over 294.6     44.5    2     8.56    9.01    9.46    9.91   10.36   10.81   11.26   11.71
    Over 256.5   172.1-294.6     50.5          9.60   10.10   10.61   11.11   11.62   12.12   12.63   13.13
                  Over 294.6     48.0    3     9.13    9.62   10.10   10.58   11.06   11.54   12.02   12.50
</TABLE>
 
  COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL      COMBINED
    FEDERAL      ADJUSTED       STATE,
    TAXABLE        GROSS         LOCAL                     TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME      AND FEDERAL     --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%   6.50%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 23.4 $     0-100.0     25.0    %     6.33    6.67    7.00    7.33    7.67    8.00    8.33    8.67
                 100.0-114.7     25.5          6.38    6.71    7.05    7.38    7.72    8.05    8.39    8.72
    23.4- 56.6       0-100.0     36.5          7.48    7.87    8.27    8.66    9.06    9.45    9.84   10.24
                 100.0-114.7     37.0          7.54    7.94    8.33    8.73    9.13    9.52    9.92   10.32
    56.6-118.0       0-100.0     39.5          7.85    8.26    8.68    9.09    9.50    9.92   10.33   10.74
                 100.0-114.7     39.5          7.85    8.26    8.68    9.09    9.50    9.92   10.33   10.74
                 114.7-150.0     41.0          8.05    8.47    8.90    9.32    9.75   10.17   10.59   11.02
                 150.0-237.2     40.5          7.98    8.40    8.82    9.24    9.66   10.08   10.50   10.92
   118.0-256.5   114.7-150.0     45.5          8.72    9.17    9.63   10.09   10.55   11.01   11.47   11.93
                 150.0-237.2     45.5          8.72    9.17    9.63   10.09   10.55   11.01   11.47   11.93
                  Over 237.2     44.5    2     8.56    9.01    9.46    9.91   10.36   10.81   11.26   11.71
    Over 256.5    Over 237.2     48.0    3     9.13    9.62   10.10   10.58   11.06   11.54   12.02   12.50
</TABLE>
 
<TABLE>
<S>         <C>
<FN>
------------------
      1 The table reflects the effect of the limitations  on itemized deductions and the deduction for personal exemptions.  They
were  designed to phase out certain benefits of these deductions for higher income taxpayers. These limitations, in effect, raise
the marginal Federal tax rate  to approximately 44.0 percent for  taxpayers filing a joint return  and entitled to four  personal
exemptions  and to approximately 41.0 percent for taxpayers filing a single return entitled to only one personal exemption. These
limitations are subject  to certain  maximums, which depend  on the  number of  exemptions claimed and  the total  amount of  the
taxpayer's  itemized deductions. For example, the limitation  on itemized deductions will not cause  a taxpayer to lose more than
80% of his allowable itemized deductions, with certain exceptions. The table also reflects the New York State supplemental income
tax based upon a taxpayer's New York State taxable income and New York State adjusted gross income. This supplemental tax results
in an increased marginal state  income tax rate to the  extent a taxpayer's New York  State adjusted gross income ranges  between
$100,000  and $150,000. The table  does not, however, reflect  the amendments to the  New York State income  tax law that imposes
limitations on the deductibility of itemized deductions. The application of the New York State limitation on itemized  deductions
may result in a higher combined Federal, State and local tax rate than indicated in the table. The table assumes for this purpose
that a taxpayer's New York State adjusted income equals his Federal adjusted gross income.
      2 Federal tax rate reverts to 36.0% after the 80% cap on the limitation on itemized deductions has been met.
      3 Federal tax rate reverts to 39.6% after the 80% cap on the limitation on itemized deductions has been met.
</TABLE>
 
                                       41
<PAGE>
    A  comparison of tax-free  and equivalent taxable  estimated current returns
with the returns on  various taxable investments is  one element to consider  in
making  an  investment  decision. The  Sponsor  may  from time  to  time  in its
advertising and sales materials  compare the then  current estimated returns  on
the Trust and returns over specified periods on other similar Nuveen Trusts with
returns  on taxable investments such as corporate or U.S. Government bonds, bank
CDs and  money  market  accounts  or  money market  funds,  each  of  which  has
investment  characteristics  that  may  differ from  those  of  the  Trust. U.S.
Government bonds, for example, are  backed by the full  faith and credit of  the
U.S.  Government and bank CDs and money market accounts are insured by an agency
of the federal government. Money market accounts and money market funds  provide
stability  of principal, but pay interest at  rates that vary with the condition
of the short-term debt market. The  investment characteristics of the Trust  are
described more fully elsewhere in this Prospectus.
 
                                       42
<PAGE>
   
NUVEEN TAX-EXEMPT UNIT TRUST
SCHEDULE OF INVESTMENTS AT DATE OF DEPOSIT
AUGUST 23, 1995
NEW YORK INSURED TRUST 240
(SERIES 820)
    
 
   
<TABLE>
<CAPTION>
                                                                                          Ratings(3)           Trustee's
                                                                      Optional       ---------------------   Determination
 Aggregate        Name of Issuer and Title of Issue Represented      Redemption       Standard                of Offering
  Principal        by Sponsor's Contracts to Purchase Bonds(1)      Provisions(2)     & Poor's    Moody's      Price(4)
<C>          <C> <S>                                              <C>                <C>         <C>        <C>
---------------------------------------------------------------------------------------------------------------------------
$   750,000      Dormitory Authority of the State of New York,    No Optional Call      AAA         Aaa     $       713,370
                   City University System Consolidated Second
                   General Resolution Revenue Bonds, Series
                   1993A, 5.75% Due 7/1/18.
    485,000      Dormitory Authority of the State of New York,       2004 at 102        AAA         Aaa             470,484
                   University of Rochester, Strong Memorial
                   Hospital Revenue Bonds, Series 1994, 5.90%
                   Due 7/1/17.
    750,000      New York Local Government Assistance                2004 at 100        AAA         Aaa             636,045
                   Corporation (A Public Benefit Corporation of
                   the State of New York), Series 1993D Bonds,
                   5.00% Due 4/1/23. (Original issue discount
                   bonds delivered on or about December 23, 1993
                   at a price of 93.445% of principal amount.)
    750,000      New York State Urban Development Corporation,       2004 at 102        AAA         Aaa             689,685
                   Correctional Facilities Revenue Bonds, 1993A
                   Refunding Series, 5.50% Due 1/1/16.
    750,000      The City of New York (New York), General            2005 at 101        AAA         Aaa             775,883
                   Obligation Bonds, Fiscal 1995 Series F,
                   6.625% Due 2/15/25.
    600,000      Metropolitan Transportation Authority (New       No Optional Call      AAA         Aaa             577,290
                   York), Commuter Facilities Service Contract
                   Bonds, Series O, 5.75% Due 7/1/13.
    165,000      Metropolitan Transportation Authority (New        2004 at 101 1/2      AAA         Aaa             166,927
                   York), Transit Facilities Revenue Bonds,
                   Series O, 6.25% Due 7/1/14.
    750,000      New York City, New York, Municipal Water            2005 at 101        AAA         Aaa             734,633
                   Finance Authority, Water and Sewer System
                   Revenue Bonds, Fiscal 1996 Series A, 6.00%
                   Due 6/15/25.
-----------                                                                                                 ---------------
$ 5,000,000                                                                                                 $     4,764,317
-----------                                                                                                 ---------------
-----------                                                                                                 ---------------
</TABLE>
    
 
See Notes to Schedules of Investments, page 54.
 
                                       43
<PAGE>
   
PENNSYLVANIA INSURED TRUST 201
    
 
   
    The  Portfolio of Pennsylvania  Insured Trust 201  consists of 7 obligations
issued by entities located in Pennsylvania. One  Bond in the Trust is a  general
obligation  of the governmental  entity issuing it  and is backed  by the taxing
power thereof. Six Bonds in the Trust  are payable as to principal and  interest
from  the income of a specific project or authority and are not supported by the
issuer's power to levy taxes. The sources of payment for these bonds are divided
as follows: College  and University  Revenue, 1; Electrical  System Revenue,  2;
Health Care Facility Revenue, 2; Water and/or Sewer Revenue, 1. All of the Bonds
in the Trust, as insured, are rated AAA by Standard & Poor's and Aaa by Moody's.
    
 
   
    At  the  Date  of  Deposit,  the  average  maturity  of  the  Bonds  in  the
Pennsylvania Insured Trust is 26.5 years. The average maturity of the Bonds in a
Trust is calculated based upon the stated maturities of the Bonds in such  Trust
(or,  with respect to  Bonds for which  funds or securities  have been placed in
escrow to redeem such Bonds on a  stated call date, based upon such call  date).
The  average maturity of the Bonds in a Trust may increase or decrease from time
to time as Bonds mature or are called or sold.
    
 
   
    Approximately 14.3% of the  aggregate principal amount of  the Bonds in  the
Trust (accounting for approximately 12.9% of the aggregate offering price of the
Bonds)    are   original    issue   discount    bonds.   See    "GENERAL   TRUST
INFORMATION--ORIGINAL ISSUE  DISCOUNT  BONDS  AND STRIPPED  OBLIGATIONS"  for  a
discussion  of the  characteristics of  such bonds  and of  the risks associated
therewith.
    
 
    Approximately 29% of  the aggregate  principal amount  of the  Bonds in  the
Trust  consists of obligations  of issuers whose  revenues are primarily derived
from the sale of electric energy.
 
    Approximately 29% of  the aggregate  principal amount  of the  Bonds in  the
Trust  consists of obligations  of issuers whose  revenues are primarily derived
from services provided by hospitals or other health care facilities.
 
    For a discussion of  the risks associated with  investments in the bonds  of
various issuers, see "General Trust Information" in this section.
 
   
    The  Sponsor entered into contracts to  acquire the Bonds between August 21,
1995 and August 22, 1995. The following summarizes certain information about the
Bonds as of the business day prior to the Date of Deposit:
    
 
   
<TABLE>
<CAPTION>
                                                                  DIFFERENCE BETWEEN TRUSTEE'S
                                                               DETERMINATION OF OFFERING PRICE AND
   COST TO    PROFIT (OR LOSS)   ANNUAL INTEREST   BID PRICE              THE BID PRICE
   SPONSOR       TO SPONSOR      INCOME TO TRUST    OF BONDS       (AS % OF PRINCIPAL AMOUNT)
  ----------  -----------------  ----------------  ----------  -----------------------------------
  <S>         <C>                <C>               <C>         <C>
  $3,289,177       $14,238           $198,625      $3,286,540                 .48%
</TABLE>
    
 
    Neither  cost  to  Sponsor  nor   profit  (or  loss)  to  Sponsor   reflects
underwriting  profits or losses received or  incurred by the Sponsor through its
participation  in  underwriting  syndicates.  An  underwriter  or   underwriting
syndicate  purchases bonds  from the issuer  on a negotiated  or competitive bid
basis as principal with  the motive of  marketing such bonds  to investors at  a
profit.  The Sponsor did not participate as  either the sole underwriter or as a
manager or member of a syndicate that  acted as the original underwriter of  any
of the Bonds.
 
   
    Unitholders  may elect  to have  interest distributions  made on  a monthly,
quarterly or semi-annual basis. The interest on the Bonds initially deposited in
the Pennsylvania Insured Trust, less estimated expenses, is estimated to  accrue
at  the  rate  of  $.01522  per  Unit per  day  under  the  semi-annual  plan of
distribution, $.01517 per Unit per day under
    
 
                                       44
<PAGE>
   
the quarterly  plan of  distribution and  $.01508  per Unit  per day  under  the
monthly  plan of distribution. It is anticipated  that the amount of interest to
be distributed  per Unit  in each  year  under each  plan of  distribution  will
initially be substantially equal to the Estimated Net Annual Interest Income per
Unit for that plan.
    
 
    Details of interest distributions per Unit of the Pennsylvania Insured Trust
under  the various plans appear in the  following table based upon estimated Net
Annual Interest Income at the Date of Deposit:
 
   
<TABLE>
<CAPTION>
                                                                                                          NORMAL
                                                                                                      DISTRIBUTIONS
PENNSYLVANIA INSURED TRUST                        1995                             1996                  PER YEAR
<S>                                     <C>            <C>            <C>            <C>            <C>
----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
--------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5730(1)                                                  $  5.4308
                                                          --------  $.4524 every month  --------
Quarterly Distribution Plan...........  $   .5730(1)   $   .4551(2)   $  1.3653      $  1.3653        $  5.4628
Semi-Annual Distribution Plan.........  $   .5730(1)   $   .4566(3)                  $  2.7396        $  5.4818
--------------------------------------------------------------------------------------------------------------------
<FN>
 * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May  1,
   August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1)  The first distribution will be paid to all Unitholders,  regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The  second distribution  under the  quarterly  distribution plan  represents a  1-month distribution;  subsequent  quarterly
    distributions will be regular 3-month distributions.
(3)  The second distribution  under the semi-annual distribution  plan represents a  1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
    The accrual amounts set forth above, and  in turn the amount of interest  to
be  distributed annually per Unit, will  generally change as Bonds are redeemed,
mature or are sold or as fees and expenses increase or decrease.
 
TAX STATUS--PENNSYLVANIA INSURED TRUST
 
    For a discussion of the Federal tax status of income earned on  Pennsylvania
Insured Trust Units, see Section 11.
 
    In  the opinion of  Dechert Price & Rhoads,  special Pennsylvania counsel to
the Series, under existing law:
 
        Units evidencing  fractional  undivided interests  in  the  Pennsylvania
    Insured  Trust  are  not  subject  to any  of  the  personal  property taxes
    presently in effect in Pennsylvania to the extent of that proportion of  the
    Trust  represented by Bonds issued by  the Commonwealth of Pennsylvania, its
    agencies and  instrumentalities,  or by  any  county, city,  borough,  town,
    township,  school  district,  municipality  and  local  housing  or  parking
    authority in the Commonwealth of Pennsylvania or issued by Puerto Rico,  the
    Virgin Islands, Guam or the Northern Mariana Islands ("Pennsylvania Bonds").
    The  taxes referred to  above include the County  Personal Property Tax, the
    additional personal property  taxes imposed on  Pittsburgh residents by  the
    School  District of Pittsburgh  and by the  City of Pittsburgh.  The City of
    Pittsburgh, the School  District of Pittsburgh  and Allegheny County  cannot
    impose  personal property taxes as of  January 1, 1995. Pennsylvania Insured
    Trust Units may  be taxable  under the Pennsylvania  inheritance and  estate
    taxes.
 
        The  proportion  of interest  income  representing interest  income from
    Pennsylvania Bonds distributed  to Unitholders of  the Pennsylvania  Insured
    Trust is not taxable under the Pennsylvania Personal Income Tax or under the
    Corporate  Net Income Tax imposed  on corporations by Article  IV of the Tax
    Reform Code. Nor will such interest be taxable
 
                                       45
<PAGE>
    under the  Philadelphia School  District Investment  Income Tax  imposed  on
    Philadelphia resident individuals.
 
        The disposition by the Pennsylvania Insured Trust of a Pennsylvania Bond
    (whether  by sale,  exchange, redemption  or payment  at maturity)  will not
    constitute a taxable event to  a Unitholder under the Pennsylvania  Personal
    Income  Tax if the Pennsylvania  Bond was issued prior  to February 1, 1994.
    Further, although there is no published authority on the subject, counsel is
    of the opinion that (i) a Unitholder of the Pennsylvania Insured Trust  will
    not have a taxable event under the Pennsylvania state and local income taxes
    referred  to in the preceding paragraph (other than the Corporate Net Income
    Tax) upon  the  redemption or  sale  of his  Unit  to the  extent  that  the
    Pennsylvania  Insured Trust is  then comprised of  Pennsylvania Bonds issued
    prior to February  1, 1994  and (ii)  the dispositions  by the  Pennsylvania
    Insured  Trust of a Pennsylvania Bond (whether by sale, exchange, redemption
    or payment at maturity) will not constitute a taxable event to a  Unitholder
    under  the  Corporate Net  Income Tax  or  the Philadelphia  School District
    Investment Income Tax if the Pennsylvania Bond was issued prior to  February
    1,  1994.  (The  School District  tax  has  no application  to  gain  on the
    disposition of property held by the taxpayer for more than six months.)
 
        Gains on the  sale, exchange, redemption,  or payment at  maturity of  a
    Pennsylvania Bond issued on or after February 1, 1994, will be taxable under
    all of these taxes, as will gains on the redemption or sale of a unit to the
    extent  that the Trust is comprised of Pennsylvania Bonds issued on or after
    February 1, 1994.
 
ECONOMIC FACTORS--PENNSYLVANIA
 
    RISK  FACTORS--Prospective   investors   should   consider   the   financial
difficulties and pressures which the Commonwealth of Pennsylvania and certain of
its municipal subdivisions have undergone. Both the Commonwealth and the City of
Philadelphia have historically experienced significant revenue shortfalls. There
can  be no assurance that the  Commonwealth will not experience further declines
in economic conditions or that  portions of the municipal obligations  purchased
by  the Fund  will not  be affected  by such  declines. Without  intending to be
complete, the following briefly  summarizes some of  these difficulties and  the
current  financial situation, as  well as some of  the complex factors affecting
the financial situation in the Commonwealth. It is derived from sources that are
generally available to investors  and is based in  part on information  obtained
from  various agencies in the Commonwealth. No independent verification has been
made of the following information.
 
    STATE ECONOMY--Pennsylvania  has been  historically  identified as  a  heavy
industry  state although that reputation has  changed recently as the industrial
composition of the Commonwealth  diversified when the  coal, steel and  railroad
industries began to decline. The major new sources of growth in the Commonwealth
are  in the  service sector, including  trade, medical and  the health services,
education and financial institutions. The Commonwealth's agricultural industries
are also an important component of  its economic structure, accounting for  more
than $3.6 billion in crop and livestock products annually while agribusiness and
food related industries support $39 billion in economic activity annually.
 
    Employment  within the  Commonwealth increased  steadily from  1984 to 1990.
From 1991 to  1994, employment  in the  Commonwealth declined  1.2 percent.  The
growth  in employment  experienced in  the Commonwealth  during such  periods is
comparable to the  growth in  employment in the  Middle Atlantic  region of  the
United  States. Non-manufacturing  employment in the  Commonwealth has increased
steadily since 1980  to its  1994 level of  82.0 percent  of total  Commonwealth
employment. Manufacturing, which
 
                                       46
<PAGE>
contributed  18.0 percent of 1994 non-agricultural employment, has fallen behind
both the services sector and  the trade sector as  the largest single source  of
employment  within the Commonwealth. In 1994,  the services sector accounted for
29.9 percent of all  non-agricultural employment in  the Commonwealth while  the
trade sector accounted for 22.9 percent.
 
    The  Commonwealth recently experienced a  slowdown in its economy. Moreover,
economic strengths and weaknesses vary  in different parts of the  Commonwealth.
In  general,  heavy  industry  and  manufacturing  have  been  facing increasing
competition from foreign producers. During 1994, the annual average unemployment
rate in the Commonwealth was 6.2 percent compared to 6.1 percent for the  United
States.  For June 1995 the  unadjusted unemployment rate was  6.0 percent in the
Commonwealth and 5.8 percent in the United States, while the seasonally adjusted
unemployment rate for the Commonwealth was 6.2 percent and for the United States
was 5.6 percent.
 
    STATE BUDGET--The  Commonwealth  operates under  an  annual budget  that  is
formulated and submitted for legislative approval by the Governor each February.
The  Pennsylvania  Constitution  requires that  the  Governor's  budget proposal
consist of three parts: (i) a  balanced operating budget setting forth  proposed
expenditures  and estimated revenues from all sources and, if estimated revenues
and available surplus are less than proposed expenditures, recommending specific
additional sources of revenue sufficient to  pay the deficiency; (ii) a  capital
budget  setting forth proposed expenditures to  be financed from the proceeds of
obligations of the  Commonwealth or its  agencies or from  operating funds;  and
(iii)  a financial plan for not less than the succeeding five fiscal years, that
includes for each year projected  operating expenditures and estimated  revenues
and  projected expenditures for capital projects.  The General Assembly may add,
change or delete  any items  in the  budget prepared  by the  Governor, but  the
Governor  retains veto  power over the  individual appropriations  passed by the
legislature. The Commonwealth's fiscal  year begins on July  1 and ends on  June
30.
 
    All  funds  received by  the Commonwealth  are  subject to  appropriation in
specific amounts by the  General Assembly or by  executive authorization by  the
Governor.  Total appropriations enacted  by the General  Assembly may not exceed
the ensuing  year's  estimated revenues,  plus  (less) the  unappropriated  fund
balance  (deficit) of the preceding year, except for constitutionally authorized
debt service payments. Appropriations from the principal operating funds of  the
Commonwealth  (the General  Fund, the Motor  License Fund and  the State Lottery
Fund)  are  generally  made  for  one  fiscal  year  and  are  returned  to  the
unappropriated  surplus of the fund if not spent or encumbered by the end of the
fiscal year. The Constitution specifies that a surplus of operating funds at the
end of a fiscal year must be appropriated for the ensuing year.
 
    Pennsylvania  uses  the  "fund"  method  of  accounting  for  receipts   and
disbursements. For purposes of government accounting, a "fund" is an independent
fiscal  and accounting entity  with a self-balancing  set of accounts, recording
cash and/or other resources together  with all related liabilities and  equities
that  are  segregated for  the  purpose of  carrying  on specific  activities or
attaining certain objectives in accordance with the fund's special  regulations,
restrictions  or  limitations. In  the Commonwealth,  over  150 funds  have been
established by  legislative  enactment or  in  certain cases  by  administrative
action  for the  purpose of  recording the  receipts and  disbursement of moneys
received by the Commonwealth.  Annual budgets are adopted  each fiscal year  for
the  principal operating  funds of  the Commonwealth  and several  other special
revenue funds. Expenditures  and encumbrances  against these funds  may only  be
made  pursuant to  appropriation measures  enacted by  the General  Assembly and
approved   by   the   Governor.    The   General   Fund,   the    Commonwealth's
 
                                       47
<PAGE>
largest fund, receives all tax revenues, non-tax revenues and federal grants and
entitlements  that  are not  specified  by law  to  be deposited  elsewhere. The
majority of the Commonwealth's operating and administrative expenses are payable
from  the  General  Fund.  Debt  service   on  all  bond  indebtedness  of   the
Commonwealth,  except that  issued for  highway purposes  or for  the benefit of
other special revenue funds, is payable from the General Fund.
 
    Financial information for the principal operating funds of the  Commonwealth
are maintained on a budgetary basis of accounting, which is used for the purpose
of  ensuring compliance with the enacted operating budget. The Commonwealth also
prepares annual  financial  statements  in accordance  with  generally  accepted
accounting principles ("GAAP"). Budgetary basis financial reports are based on a
modified  cash basis  of accounting  as opposed to  a modified  accrual basis of
accounting prescribed  by  GAAP. Financial  information  is adjusted  at  fiscal
year-end  to reflect appropriate accruals  for financial reporting in conformity
with GAAP.
 
    RECENT FINANCIAL  RESULTS--From fiscal  1984,  when the  Commonwealth  first
prepared  its financial  statements on  a GAAP  basis, through  fiscal 1989, the
Commonwealth reported a  positive unreserved-undesignated fund  balance for  its
governmental  fund types at each fiscal year end. Slowing economic growth during
1990, leading to a national economic recession beginning in fiscal 1991, reduced
revenue  growth  and   increased  expenditures  and   contributed  to   negative
unreserved-undesignated  fund balances  at the end  of the 1990  and 1991 fiscal
years. The  negative unreserved-undesignated  fund balance  was due  largely  to
operating  deficits in the General Fund and  the State Lottery Fund during those
fiscal years. Actions taken  during fiscal 1992 to  bring the General Fund  back
into  balance, including tax increases and expenditure restraints, resulted in a
$1.1 billion reduction to the unreserved-undesignated fund deficit for  combined
governmental  fund  types at  June 30,  1993, as  a result  of a  $420.4 million
increase in  the balance.  These gains  were produced  by continued  efforts  to
control  expenditure growth.  The Combined  Balance Sheet  as of  June 30, 1993,
showed total fund  balance and  other credits  for the  total governmental  fund
types  of $1,959.9 million, a  $732.1 million increase from  the balance at June
30, 1992. During  fiscal 1993,  total assets  increased by  $1,296.7 million  to
$7,096.4  million,  while  liabilities  increased  $564.6  million  to  $5,136.5
million.
 
    FISCAL 1991 FINANCIAL RESULTS--The Commonwealth experienced a $453.6 million
General Fund  deficit  as of  the  end of  its  1991 fiscal  year.  The  deficit
reflected  higher than  budgeted expenditures,  below-estimate economic activity
and growth rates of economic indicators  and total tax revenue shortfalls  below
those assumed in the enacted budget.
 
    Rising   demands  on  state  programs  caused  by  the  economic  recession,
particularly for  medical  assistance  and cash  assistance  programs,  and  the
increased  costs  of special  education programs  and correction  facilities and
programs, contributed  to  increased  expenditures in  fiscal  1991,  while  tax
revenues  for  the  1991 fiscal  year  were  severely affected  by  the economic
recession. Total corporation tax receipts and sales and use tax receipts  during
fiscal  1991  were,  respectively, 7.3  percent  and 0.9  percent  below amounts
collected during fiscal 1990. Personal income tax receipts also were affected by
the recession but  not to  the extent  of the  other major  General Fund  taxes,
increasing only 2.0 percent over fiscal 1990 collections.
 
    A   number  of  actions  were  taken  throughout  the  fiscal  year  by  the
Commonwealth to mitigate  the effects of  the recession on  budget revenues  and
expenditures.  The  Commonwealth  initiated a  number  of  cost-saving measures,
including the  firing  of  2,000  state employees,  deferral  of  paychecks  and
reduction  of funds to state universities,  which resulted in approximately $871
million cost savings.
 
                                       48
<PAGE>
    FISCAL 1992 FINANCIAL RESULTS--Actions taken during fiscal 1992 to bring the
General Fund budget back into  balance, including tax increases and  expenditure
restraints  resulted in a $1.1 billion reduction for the unreserved-undesignated
fund deficit for  combined governmental fund  types and a  return to a  positive
fund  balance.  Total  General  Fund revenues  for  fiscal  1992  were $14,516.8
million, which is approximately 22 percent  higher than fiscal 1991 revenues  of
$11,877.3  million due  in large part  to tax increases.  The increased revenues
funded substantial  increases  in  education, social  services  and  corrections
programs.  As a  result of the  tax increases and  certain appropriation lapses,
fiscal 1992 ended  with an $8.8  million surplus after  having started the  year
with an unappropriated General Fund balance deficit of $453.6 million.
 
    FISCAL  1993 FINANCIAL RESULTS--Fiscal 1993 closed with revenues higher than
anticipated and expenditures approximately as projected, resulting in an  ending
unappropriated  balance surplus of  $242.3 million. A  deduction in the personal
income tax  rate  in  July  1992  and the  one-time  receipt  of  revenues  from
retroactive  corporate tax increases  in fiscal 1992  were responsible, in part,
for the low growth in fiscal 1993.
 
    FISCAL 1994 FINANCIAL RESULTS--Commonwealth revenues during the 1994  fiscal
year  totaled $15,210.7 million,  $38.6 million above  the fiscal year estimate,
and 3.9 percent  over commonwealth  revenues during  the 1993  fiscal year.  The
sales  tax was an  important contributor to the  higher than estimated revenues.
The strength of collections  from the sales tax  offset the lower than  budgeted
performance  of the personal  income tax that  ended the 1994  fiscal year $74.4
million below estimate. The shortfall in the personal income tax was largely due
to shortfalls in income not subject  to withholding such as interest,  dividends
and  other income. Expenditures, excluding pooled financing expenditures and net
of all fiscal 1994 appropriation lapses, totaled $14,934.4 million  representing
a  7.2 percent  increase over fiscal  1993 expenditures.  Medical assistance and
prisons spending contributed to the rate of spending growth for the 1994  fiscal
year.  The Commonwealth maintained an operating balance on a budgetary basis for
fiscal 1994  producing a  fiscal year  ending unappropriated  surplus of  $335.8
million.
 
    FISCAL  1995 BUDGET--On June  16, 1994, the Governor  signed a $15.7 billion
General Fund  budget, an  increase of  over  3.9 percent  from the  Fiscal  1994
budget. A substantial amount of the increase was targeted for medical assistance
expenditures, reform of the state-funded public assistance program and education
subsidies  to local  school districts. The  budget also  included tax reductions
totaling an estimated $166.4 million benefiting principally low income  families
and  corporations. Fiscal 1995 was projected to end with a $3.2 million year-end
unappropriated surplus.
 
    FISCAL 1996 BUDGET--On June  30, 1995, the Governor  signed a $16.2  billion
general  fund budget, an  increase of approximately 2.8  percent from the fiscal
1995 budget.  Areas  receiving  the  largest  budgetary  increases  are  medical
assistance  and basic education.  In addition, the  budget accelerated corporate
net income  tax  rate reductions,  eliminated  the  inheritance tax  paid  by  a
surviving  spouse  on  jointly  owned  property,  and  made  other  business tax
reductions.
 
    DEBT LIMITS AND OUTSTANDING DEBT--The Pennsylvania Constitution permits  the
issuance  of the following types  of debt: (i) debt  to suppress insurrection or
rehabilitate areas affected  by disaster; (ii)  electorate approved debt;  (iii)
debt for capital projects subject to an aggregate outstanding debt limit of 1.75
times  the annual average tax  revenues of the preceding  five fiscal years; and
(iv) tax anticipation notes payable in the fiscal year of issuance.
 
                                       49
<PAGE>
    Under the  Pennsylvania Fiscal  Code,  the Auditor  General is  required  to
certify  to the Governor and the  General Assembly certain information regarding
the Commonwealth's  indebtedness. According  to the  February 28,  1995  Auditor
General  certificate, the average annual tax  revenues deposited in all funds in
the five fiscal years ended June  30, 1994 was approximately $16.5 billion,  and
therefore,  the net debt limitation  for the 1995 fiscal  year is $28.8 billion.
Outstanding net debt totaled $4.0 billion at June 30, 1994, approximately  equal
to  the net  debt at June  30, 1993.  At February 28,  1995, the  amount of debt
authorized by law to be issued, but not yet incurred, was $16.7 billion.
 
    DEBT RATINGS--All outstanding general  obligation bonds of the  Commonwealth
are rated AA- by S&P and A1 by Moody's.
 
    CITY   OF   PHILADELPHIA--The   City   of   Philadelphia   (the   "City"  or
"Philadelphia")  is  the   largest  city  in   the  Commonwealth.   Philadelphia
experienced a series of general fund deficits for fiscal years 1988 through 1992
which  have culminated in the City's  present serious financial difficulties. In
its  1992  Comprehensive  Annual  Financial  Report,  Philadelphia  reported   a
cumulative general fund deficit of $71.4 million for fiscal year 1992.
 
    In  June  1991, the  Pennsylvania  legislature established  the Pennsylvania
Intergovernmental Cooperation  Authority  ("PICA"), a  five-member  board  which
oversees  the  fiscal  affairs  of the  City  of  Philadelphia.  The legislation
empowers PICA  to issue  notes and  bonds on  behalf of  Philadelphia, and  also
authorizes  Philadelphia to levy  a one-percent sales tax  the proceeds of which
would be used  to pay off  the bonds.  In return for  PICA's fiscal  assistance,
Philadelphia is required, among other things, to establish a five-year financial
plans   that  include  balanced  annual   budgets.  Under  the  legislation,  if
Philadelphia does  not comply  with such  requirements, PICA  may withhold  bond
revenues and certain state funding.
 
    At  this time, the City is operating  under a five-year fiscal plan approved
by PICA on April 6, 1992. Full implementation of the five-year plan was  delayed
due  to labor  negotiations that  were not  completed until  October 1992, three
months after the expiration  of the old  labor contracts. The  terms of the  new
labor  contracts are  estimated to cost  approximately $144.4  million more than
what was budgeted in the original five-year plan. An amended five-year plan  was
approved  by  PICA in  May  1993. The  Mayor's  latest update  of  the five-year
financial plan was approved by PICA on May 2, 1994.
 
    As of November 17, 1994, PICA has issued $1,296.7 million of its Special Tax
Revenue Bonds. In accordance with the enabling legislation, PICA was  guaranteed
a  percentage of the wage tax revenue expected to be collected from Philadelphia
residents to permit repayment of the bonds.
 
    In January 1993, Philadelphia anticipated  a cumulative general fund  budget
deficit  of $57 million for the 1993 fiscal year. In response to the anticipated
deficit, the Mayor unveiled a financial plan eliminating the budget deficit  for
the  1993 budget year through  significant service cuts that  included a plan to
privatize certain city  provided services. Due  to an upsurge  in tax  receipts,
cost-cutting  and additional  PICA borrowings,  Philadelphia completed  the 1993
fiscal year with a balanced general  fund budget. The audit findings for  fiscal
1993  show a cumulative general fund surplus of approximately $3 million for the
fiscal year ended June 30, 1993.
 
    In January 1994, the Mayor proposed a $2.3 billion city general fund  budget
that  included no  tax increases,  no significant service  cuts and  a series of
modest health  and welfare  program  increases. At  that  time, the  Mayor  also
unveiled  a $2.2 billion program  (the "Philadelphia Economic Stimulus Program")
designed to stimulate Philadelphia's economy and  stop the loss of 1,000 jobs  a
month. In its 1994 Comprehensive Annual Financial Report,
 
                                       50
<PAGE>
Philadelphia  reported a cumulative general  fund surplus of approximately $15.4
million for the fiscal year ended June 30, 1994.
 
    The Standard & Poor's Corporation rating on Philadelphia general  obligation
bonds is "B-." Moody's rating is currently "Baa."
 
    LITIGATION--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 also faces tort claims  made possible by the limited waiver  of
sovereign immunity effected by Act 152, approved September 28, 1978, as amended.
 
PENNSYLVANIA TAXABLE ESTIMATED CURRENT RETURN TABLE
 
    The  following tables show the approximate taxable estimated current returns
for individuals  that are  equivalent to  tax-exempt estimated  current  returns
under  combined Federal and  state taxes, using  published 1995 marginal Federal
tax rates and marginal state tax  rates currently available and scheduled to  be
in  effect.  The  tables  incorporate  increased  tax  rates  for  higher-income
taxpayers that were  included in  the Revenue  Reconciliation Act  of 1993.  For
cases  in which more than one state  bracket falls within a Federal bracket, the
highest state bracket is combined with  the Federal bracket. The combined  state
and  Federal tax  brackets shown  reflect the fact  that state  tax payments are
currently deductible for Federal  tax purposes. The  tables illustrate what  you
would  have to  earn on  taxable investments  to equal  the tax-exempt estimated
current return for your  income tax bracket. A  taxpayer's marginal tax rate  is
affected  by both his taxable income and  his adjusted gross income. Locate your
adjusted gross and  your taxable  income (which  is your  adjusted gross  income
reduced by any deductions and exemptions), then locate your tax bracket based on
joint  or single  tax filing.  Read across  to the  equivalent taxable estimated
current return you would need to match the tax-free income.
 
                                       51
<PAGE>
 COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS      STATE* AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%   6.50%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 39.0 $     0-114.7      17.5   %     5.76    6.06    6.36    6.67    6.97    7.27    7.58    7.88
    39.0- 94.3       0-114.7      30.0         6.79    7.14    7.50    7.86    8.21    8.57    8.93    9.29
                 114.7-172.1      31.0         6.88    7.25    7.61    7.97    8.33    8.70    9.06    9.42
    94.3-143.6       0-114.7      33.0         7.09    7.46    7.84    8.21    8.58    8.96    9.33    9.70
                 114.7-172.1      34.0         7.20    7.58    7.95    8.33    8.71    9.09    9.47    9.85
                 172.1-294.6      36.5         7.48    7.87    8.27    8.66    9.06    9.45    9.84   10.24
   143.6-256.5   114.7-172.1      39.0         7.79    8.20    8.61    9.02    9.43    9.84   10.25   10.66
                 172.1-294.6      41.5         8.12    8.55    8.97    9.40    9.83   10.26   10.68   11.11
                  Over 294.6      39.0   2     7.79    8.20    8.61    9.02    9.43    9.84   10.25   10.66
    Over 256.5   172.1-294.6      45.5         8.72    9.17    9.63   10.09   10.55   11.01   11.47   11.93
                  Over 294.6      42.5   3     8.26    8.70    9.13    9.57   10.00   10.43   10.87   11.30
</TABLE>
 
  COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION
--------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  FEDERAL
    FEDERAL      ADJUSTED      COMBINED
    TAXABLE        GROSS      STATE* AND                   TAX-EXEMPT ESTIMATED CURRENT RETURN
    INCOME        INCOME        FEDERAL       --------------------------------------------------------------
   (1,000'S)     (1,000'S)     TAX RATE1      4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%   6.50%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 23.4 $     0-114.7      17.5         5.76    6.06    6.36    6.67    6.97    7.27    7.58    7.88
    23.4- 56.6       0-114.7      30.0         6.79    7.14    7.50    7.86    8.21    8.57    8.93    9.29
    56.6-118.0       0-114.7      33.0         7.09    7.46    7.84    8.21    8.58    8.96    9.33    9.70
                 114.7-237.2      34.5         7.25    7.63    8.02    8.40    8.78    9.16    9.54    9.92
   118.0-256.5   114.7-237.2      39.5         7.85    8.26    8.68    9.09    9.50    9.92   10.33   10.74
                  Over 237.2      39.0   2     7.79    8.20    8.61    9.02    9.43    9.84   10.25   10.66
    Over 256.5    Over 237.2      42.5   3     8.26    8.70    9.13    9.57   10.00   10.43   10.87   11.30
<FN>
------------------
      1 The table reflects the effect of the limitations  on itemized deductions and the deduction for personal exemptions.  They
were  designed to phase out certain benefits of these deductions for higher income taxpayers. These limitations, in effect, raise
the current maximum marginal Federal tax rate to approximately 44.0  percent for taxpayers filing a joint return and entitled  to
four  personal exemptions and to  approximately 41.0 percent for taxpayers  filing a single return  entitled to only one personal
exemption. These limitations are  subject to certain maximums,  which depend on  the number of exemptions  claimed and the  total
amount  of the taxpayer's itemized  deductions. For example, the limitation  on itemized deductions will  not cause a taxpayer to
lose more than 80% of his allowable itemized deductions, with certain exceptions.
      2 Federal tax rate reverts to 36.0% after the 80% cap on the limitation on itemized deductions has been met.
      3 Federal tax rate reverts to 39.6% after the 80% cap on the limitation on itemized deductions has been met.
</TABLE>
 
    A comparison of  tax-free and equivalent  taxable estimated current  returns
with  the returns on various  taxable investments is one  element to consider in
making an  investment  decision.  The Sponsor  may  from  time to  time  in  its
advertising  and sales materials  compare the then  current estimated returns on
the Trust and returns over specified periods on other similar Nuveen Trusts with
returns on taxable investments such as corporate or U.S. Government bonds,  bank
CDs  and  money  market  accounts  or money  market  funds,  each  of  which has
investment characteristics  that  may  differ  from those  of  the  Trust.  U.S.
Government  bonds, for example, are  backed by the full  faith and credit of the
U.S. Government and bank CDs and money market accounts are insured by an  agency
of  the federal government. Money market accounts and money market funds provide
stability of principal, but pay interest  at rates that vary with the  condition
of  the short-term debt market. The  investment characteristics of the Trust are
described more fully elsewhere in this Prospectus.
 
                                       52
<PAGE>
   
NUVEEN TAX-EXEMPT UNIT TRUST
SCHEDULE OF INVESTMENTS AT DATE OF DEPOSIT
AUGUST 23, 1995
PENNSYLVANIA INSURED TRUST 201
(SERIES 820)
    
 
   
<TABLE>
<CAPTION>
                                                                                          Ratings(3)           Trustee's
                                                                      Optional       ---------------------   Determination
 Aggregate        Name of Issuer and Title of Issue Represented      Redemption       Standard                of Offering
  Principal        by Sponsor's Contracts to Purchase Bonds(1)      Provisions(2)     & Poor's    Moody's      Price(4)
<C>          <C> <S>                                              <C>                <C>         <C>        <C>
---------------------------------------------------------------------------------------------------------------------------
$   500,000      Pennsylvania Higher Educational Facilities          2005 at 102        AAA         Aaa     $       484,580
                   Authority (Commonwealth of Pennsylvania),
                   Saint Joseph's University Revenue Bonds,
                   Series of 1995, 5.875% Due 7/15/25.
    500,000      Delaware County Authority (Commonwealth of          2005 at 102        AAA         Aaa             467,505
                   Pennsylvania), Hospital Revenue Bonds, Series
                   of 1995 (Delaware County Memorial Hospital),
                   5.50% Due 8/15/13.
    500,000      Lancaster County Hospital Authority, Lancaster,     2004 at 102        AAA         Aaa             426,740
                   Pennsylvania, Health Center Revenue Refunding
                   Bonds, Series of 1994 (Masonic Homes
                   Project), 5.00% Due 11/15/20. (Original issue
                   discount bonds delivered on or about March 1,
                   1994 at a price of 92.378% of principal
                   amount.)
    500,000      Lehigh County Industrial Development Authority,     2005 at 102        AAA         Aaa             500,000
                   Pollution Control Revenue Refunding Bonds,
                   1995 Series A (Pennsylvania Power & Light
                   Company Project), 6.15% Due 8/1/29.
    500,000      Northampton County Industrial Development           2005 at 102        AAA         Aaa             496,740
                   Authority (Pennsylvania), Pollution Control
                   Revenue Refunding Bonds, 1995 Series A
                   (Metropolitan Edison Company Project), 6.10%
                   Due 7/15/21.
    500,000      The Pittsburgh (Pennsylvania) Water and Sewer       2005 at 100        AAA         Aaa             474,490
                   Authority, Water and Sewer System Subordinate
                   Revenue Bonds, Series B of 1995, 5.70% Due
                   9/1/20.
    500,000      West Middlesex Area School District (Mercer         2004 at 100        AAA         Aaa             453,360
                   County, Pennsylvania), General Obligation
                   Bonds, Series of 1993, 5.40% Due 6/15/23.
-----------                                                                                                 ---------------
$ 3,500,000                                                                                                 $     3,303,415
-----------                                                                                                 ---------------
-----------                                                                                                 ---------------
</TABLE>
    
 
See Notes to Schedules of Investments, page 54.
 
                                       53
<PAGE>
NOTES TO SCHEDULES OF INVESTMENTS
 
    (1) Contracts,  which  are  "when-issued"  or  "regular  way"  contracts  or
        contracts having delivery dates beyond the normal settlement date,  have
        been  deposited with the Trustee on the Date of Deposit. The performance
        of such contracts is secured by an irrevocable letter of credit,  issued
        by  a major commercial bank, which  has been deposited with the Trustee.
        At the Date  of Deposit, Bonds  may have been  delivered to the  Sponsor
        pursuant  to certain of these contracts; the Sponsor has assigned to the
        Trustee all of its right, title and interest in and to such Bonds.
 
    (2) The Bonds are first subject to optional redemption in the years, and  at
        the  prices, shown.  Unless otherwise  indicated, the  Bonds, except for
        Bonds issued at a substantial original issue discount, are redeemable at
        declining prices (but not below par value) in subsequent years. Original
        issue  discount  bonds,  including  zero  coupon  bonds,  are  generally
        redeemable  at  prices  based on  the  issue  price plus  the  amount of
        original issue discount accreted to redemption plus, if applicable, some
        premium, the amount of which will decline in subsequent years. The Bonds
        may also be subject to sinking fund redemption without premium prior  to
        the dates shown.
 
        Certain  Bonds may be subject to redemption without premium prior to the
        date shown  pursuant  to  special  or  mandatory  call  provisions;  for
        example,  if bond proceeds are not able  to be used as contemplated, the
        project is condemned or sold, or the project is destroyed and  insurance
        proceeds  are used to  redeem the bonds.  Single family mortgage revenue
        bonds and housing authority bonds are  most likely to be called  subject
        to  such provisions, but other bonds may have similar call features. See
        Section 4 and "General Trust Information" in this Section.
 
        The Trustee's determination of the offering prices of Bonds in the  Fund
        may  be  greater or  less than  the  amounts that  may be  received upon
        redemption or  maturity  of  such Bonds.  Subject  to  rules  concerning
        amortization  of bond  premium and of  original issue  discount, gain or
        loss realized  by  the Trustee  on  disposition  of any  Bonds  will  be
        recognized  as taxable capital gain or loss by Unitholders. (See Section
        4.)
 
    (3) See "Description  of  Ratings" herein.  All  the Bonds  in  the  Insured
        Trusts,  as insured by the  Insurer, are rated AAA  by Standard & Poor's
        and Aaa by Moody's. (See Section 5.)
 
    (4) As determined by  Kenny S&P  Evaluation Services,  a division  of J.  J.
        Kenny Co., Inc., on behalf of the Trustee as of the close of business on
        the business day preceding the Date of Deposit. The prices as determined
        by  Kenny S&P Evaluation Services, a division  of J. J. Kenny Co., Inc.,
        have been rounded to the nearest dollar.
 
                                       54
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
   
     TO THE  BOARD OF  DIRECTORS  OF JOHN  NUVEEN  & CO.  INCORPORATED  AND
     UNITHOLDERS OF NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 820:
    
 
   
       We  have audited  the accompanying  statements of  condition and the
     related schedules of investments at  date of deposit (included in  the
     prospectus  herein)  of  Nuveen  Tax-Exempt  Unit  Trust,  Series  820
     (comprising California  Insured Trust  253, New  Jersey Insured  Trust
     196,  New York Insured Trust 240  and Pennsylvania Insured Trust 201),
     as  of  August   23,  1995.   These  financial   statements  are   the
     responsibility  of the  Sponsor. Our  responsibility is  to express an
     opinion on these financial statements based on our audits.
    
 
       We conducted  our  audits  in  accordance  with  generally  accepted
     auditing  standards. Those standards require  that we plan and perform
     the audit to obtain reasonable  assurance about whether the  financial
     statements  are  free  of  material  misstatement.  An  audit includes
     examining, on  a  test  basis, evidence  supporting  the  amounts  and
     disclosures  in  the  financial  statements.  Our  procedures included
     confirmation of the irrevocable letter  of credit arrangement for  the
     purchase  of securities,  described in Note  (1) to  the statements of
     condition, 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  that   our  audits  provide  a
     reasonable basis for our opinion.
 
   
       In  our  opinion,  the  statements  of  condition  and  the  related
     schedules  of investments at date of deposit referred to above present
     fairly, in all material  respects, the financial  position of each  of
     the  trusts constituting the Nuveen  Tax-Exempt Unit Trust, Series 820
     as  of  August  23,  1995,  in  conformity  with  generally   accepted
     accounting principles.
    
 
                                                        ARTHUR ANDERSEN LLP
 
   
     Chicago, Illinois,
     August 23, 1995.
    
 
                                       55
<PAGE>
                            Statements of Condition
   
                    NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 820
    
   
 (California Insured Trust 253, New Jersey Insured Trust 196, New York Insured
                 Trust 240 and Pennsylvania Insured Trust 201)
    
   
                             AS OF AUGUST 23, 1995
    
 
   
<TABLE>
<CAPTION>
                                            CALIFORNIA          NEW JERSEY           NEW YORK          PENNSYLVANIA
                                              INSURED             INSURED             INSURED             INSURED
    TRUST PROPERTY                           TRUST 253           TRUST 196           TRUST 240           TRUST 201
<S>                                       <C>                 <C>                 <C>                 <C>
                                          ---------------     ---------------     ---------------     ---------------
Sponsor's contracts to purchase Tax-
 Exempt Bonds, backed by an irrevocable
 letter of credit(1)(2).................  $     4,766,719     $     3,311,580     $     4,764,317     $     3,303,415
Accrued interest to August 23, 1995 on
  underlying Bonds(1)...................           64,526              46,793              39,565              28,620
Organizational costs(3).................            7,200               5,200               7,800               5,100
                                          ---------------     ---------------     ---------------     ---------------
            Total.......................  $     4,838,445     $     3,363,573     $     4,811,682     $     3,337,135
                                          ---------------     ---------------     ---------------     ---------------
                                          ---------------     ---------------     ---------------     ---------------
   LIABILITY AND INTEREST OF UNITHOLDERS
LIABILITY:
    Accrued interest to August 23, 1995
      on underlying Bonds(4)............  $        64,526     $        46,793     $        39,565     $        28,620
    Accrued organizational costs(3).....            7,200               5,200               7,800               5,100
                                          ---------------     ---------------     ---------------     ---------------
            Total.......................  $        71,726     $        51,993     $        47,365     $        33,720
                                          ---------------     ---------------     ---------------     ---------------
                                          ---------------     ---------------     ---------------     ---------------
INTEREST OF UNITHOLDERS:
    Units of fractional undivided
      interest outstanding (California
      Insured Trust 253 --50,000; New
      Jersey Insured Trust 196--35,000;
      New York Insured Trust
      240--50,000; Pennsylvania Insured
      Trust 201--35,000)
      Cost to investors(5)..............  $     5,012,300     $     3,482,193     $     5,009,775     $     3,473,607
        Less: Gross underwriting
          commission(6).................         (245,581)           (170,613)           (245,458)           (170,192)
                                          ---------------     ---------------     ---------------     ---------------
    Net amount applicable to
      investors.........................  $     4,766,719     $     3,311,580     $     4,764,317     $     3,303,415
                                          ---------------     ---------------     ---------------     ---------------
            Total.......................  $     4,838,445     $     3,363,573     $     4,811,682     $     3,337,135
                                          ---------------     ---------------     ---------------     ---------------
                                          ---------------     ---------------     ---------------     ---------------
<FN>
(1)  Represented by contracts  to purchase Tax-Exempt  Bonds which include "when  issued" or "regular  way" or "delayed delivery"
    contracts for which an irrevocable letter of  credit issued by a major commercial  bank has been deposited with the  Trustee.
    The  amount of such letter of credit and  any cash deposited exceeds the amount necessary  for the purchase of the Bonds plus
    accrued interest to the Date of  Deposit. At the Date of  Deposit, Bonds may have been  delivered to the Sponsor pursuant  to
    certain  of these contracts; the  Sponsor has assigned to  the Trustee all of  its rights, title and  interest in and to such
    Bonds.
(2) Aggregate value (at offering prices) as of the Date  of Deposit of the Bonds listed under "Schedules of Investments"  herein,
    and their aggregate cost to the Trusts are the same. Such offering prices were determined by Kenny S&P Evaluation Services as
    of the close of business on the business day prior to the Date of Deposit. (See Section 10.) Insurance coverage providing for
    the  timely payment, when due, of all principal  of and interest on the Bonds in  the Insured Trusts has been obtained by the
    Sponsor or by the issuers of such Bonds. Such insurance does not guarantee the market value of the Bonds or the value of  the
    Units.  Both the bid and the offering prices of the underlying  Bonds and of the Units may include value attributable to such
    policies of insurance.
(3) Each Trust  (and therefore  Unitholders) will bear  all or  a portion  of its estimated  organizational costs  which will  be
    deferred and amortized over five years from the Initial Date of Deposit.
(4) Representing, as set forth in Section 8, advancement by the Trustee of an amount equal to the accrued Bond interest as of the
    Date of Deposit from the later of the last payment date on the Bonds or the date of issuance thereof.
(5) Aggregate Public Offering Price (exclusive of accrued interest) computed as set forth under Section 6.
(6) The gross underwriting commission has been calculated on the assumption that the Units offered by this prospectus are sold in
    single transactions involving less than $50,000 or 500 Units. At this level, the sales charge is 4.90% of the Public Offering
    Price  in the case of National and State Trusts, 4.25% thereof in  the case of Long Intermediate Trusts, 3.90% in the case of
    Intermediate Trusts, 3.00% in the  case of Short Intermediate Trusts  and 2.50% in the case  of Short Term Trusts. In  single
    transactions involving 500 Units or more, the sales charge is reduced. (See Section 6.)
</TABLE>
    
 
                                       56
<PAGE>
GENERAL TRUST INFORMATION
 
    RISK FACTORS.
 
    An  investment in Units of any Trust should be made with an understanding of
the risks that such an investment may  entail. These include the ability of  the
issuer,  or,  if  applicable,  an  insurer, to  make  payments  of  interest and
principal when due, the  effects of changes in  interest rates generally,  early
call provisions and the potential for changes in the tax status of the Bonds. As
set  forth  in the  portfolio  summaries above,  the  Trusts may  contain  or be
concentrated in one or more of the types of bonds discussed below. The following
paragraphs discuss certain circumstances which may adversely affect the  ability
of  issuers  of Bonds  held  in the  portfolio  of a  Trust  to make  payment of
principal and interest thereon or which may adversely affect the ratings of such
Bonds; with  respect  to  Insured  Trusts, however,  because  of  the  insurance
obtained  by the Sponsor or by the issuers of the Bonds, such changes should not
adversely affect  an Insured  Trust's  receipt of  principal and  interest,  the
Standard  & Poor's AAA or Moody's Aaa ratings  of the Bonds in the Insured Trust
portfolio, or the Standard & Poor's AAA rating of the Units of each such Insured
Trust. For  economic risks  specific  to the  individual Trusts,  see  "Economic
Factors" for each Trust.
 
    HEALTH  FACILITY  OBLIGATIONS.    Some  of  the  Bonds  in  a  Trust  may be
obligations of  issuers whose  revenues are  derived from  services provided  by
hospitals  or other health care facilities,  including nursing homes. Ratings of
bonds issued  for health  care  facilities are  sometimes 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, the ability of the  facility to provide the services required,  an
increasing  shortage of qualified nurses or a dramatic rise in nursing salaries,
physicians'  confidence  in  the  facility,  management  capabilities,  economic
developments  in  the service  area, competition  from other  similar providers,
efforts by  insurers  and  governmental agencies  to  limit  rates,  legislation
establishing  state rate-setting agencies,  expenses, government regulation, the
cost and possible unavailability of  malpractice insurance, and the  termination
or  restriction of governmental financial  assistance, including that associated
with Medicare, Medicaid and other  similar third party payor programs.  Medicare
reimbursements are currently calculated on a prospective basis and are not based
on  a provider's actual costs. Such method of reimbursement may adversely affect
reimbursements to hospitals and other facilities for services provided under the
Medicare program and thereby may have an  adverse effect on the ability of  such
institutions  to satisfy  debt service requirements.  In the event  of a default
upon a bond  secured by hospital  facilities, the limited  alternative uses  for
such  facilities may result  in the recovery upon  such collateral not providing
sufficient funds to fully repay the bonds.
 
    Certain hospital  bonds  provide for  redemption  at par  upon  the  damage,
destruction  or  condemnation of  the hospital  facilities  or in  other special
circumstances.
 
    HOUSING OBLIGATIONS.  Some  of the Bonds  in a Trust  may be obligations  of
issuers  whose revenues  are primarily  derived from  mortgage loans  to housing
projects for  low  to  moderate  income  families.  Such  issues  are  generally
characterized  by mandatory redemption at par or,  in the case of original issue
discount bonds, accreted  value in  the event of  economic defaults  and in  the
event of a failure of the operator of a project to comply with certain covenants
as  to the  operation of  the project.  The failure  of such  operator to comply
 
                                      A-1
<PAGE>
with certain  covenants related  to the  tax-exempt status  of interest  on  the
Bonds,  such as  provisions requiring  that a  specified percentage  of units be
rented or available for rental to  low or moderate income families,  potentially
could cause interest on such Bonds to be subject to Federal income taxation from
the  date of  issuance of the  Bonds. The ability  of such issuers  to make debt
service payments will be  affected by events  and conditions affecting  financed
projects,  including,  among other  things, the  achievement and  maintenance of
sufficient occupancy levels  and adequate rental  income, employment and  income
conditions  prevailing in local labor markets, increases in taxes, utility costs
and other  operating  expenses,  the managerial  ability  of  project  managers,
changes  in laws and  governmental regulations, the  appropriation of subsidies,
and social and economic  trends affecting the localities  in which the  projects
are  located. Occupancy  of such housing  projects may be  adversely affected by
high rent  levels  and  income  limitations  imposed  under  Federal  and  state
programs.
 
    SINGLE  FAMILY MORTGAGE REVENUE BONDS.  Some of  the Bonds in a Trust may be
single family  mortgage revenue  bonds,  which are  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. Because these  bonds
are  subject to extraordinary mandatory redemption in whole or in part from such
prepayments of mortgage loans, a substantial portion of such bonds will probably
be redeemed prior to their scheduled maturities or even prior to their  ordinary
call dates. Extraordinary mandatory redemption without premium could also result
from  the failure  of the  originating financial  institutions to  make mortgage
loans in sufficient amounts within a specified time period. The redemption price
of such  issues may  be more  or less  than the  offering price  of such  bonds.
Additionally,  unusually high rates of default  on the underlying mortgage loans
may reduce revenues  available for the  payment of principal  of or interest  on
such  mortgage revenue bonds. Single family  mortgage revenue bonds issued after
December 31, 1980 were issued under Section 103A of the Internal Revenue Code of
1954, as amended, or  Section 143 of  the Internal Revenue  Code of 1986,  which
Sections  contain certain  requirements relating to  the use of  the proceeds of
such bonds in  order for the  interest on  such bonds to  retain its  tax-exempt
status.  In each  case, the issuer  of the  bonds has covenanted  to comply with
applicable requirements and bond  counsel to such issuer  has issued an  opinion
that  the interest on the bonds is exempt from Federal income tax under existing
laws  and  regulations.  There  can   be  no  assurance  that  such   continuing
requirements  will be  satisfied; the  failure to  meet such  requirements could
cause interest on the Bonds to  be subject to Federal income taxation,  possibly
from the date of issuance of the Bonds.
 
    FEDERALLY  ENHANCED OBLIGATIONS.   Some  of the  mortgages which  secure the
various health care or housing projects which underlie the previously  discussed
Health  Facility, Housing, and  Single Family Mortgage  Revenue Obligations (the
"Obligations") in a Trust may be  insured by the Federal Housing  Administration
("FHA").  Under FHA  regulations, the  maximum insurable  mortgage amount cannot
exceed 90%  of  the FHA's  estimated  value of  the  project. The  FHA  mortgage
insurance  does not constitute a guarantee of timely payment of the principal of
and interest on the Obligations. Payment  of mortgage insurance benefits may  be
(1)  less than the principal amount of Obligations outstanding or (2) delayed if
disputes arise as to  the amount of  the payment or if  certain notices are  not
given
 
                                      A-2
<PAGE>
to  the  FHA  within the  prescribed  time  periods. In  addition,  some  of the
previously discussed Obligations may be secured by mortgage-backed  certificates
guaranteed  by the Government  National Mortgage Association  ("GNMA"), a wholly
owned corporate  instrumentality  of  the  United  States,  and/or  the  Federal
National   Mortgage  Association  ("Fannie  Mae")   a  federally  chartered  and
stockholder-owed corporation. GNMA  and Fannie Mae  guarantee timely payment  of
principal  and  interest on  the  mortgage-backed certificates,  even  where the
underlying  mortgage  payments   are  not  made.   While  such   mortgage-backed
certificates  are often pledged  to secure payment of  principal and interest on
the Obligations, timely payment of interest and principal on the Obligations  is
not  insured or guaranteed by  the United States, GNMA,  Fannie Mae or any other
governmental agency or  instrumentality. The  GNMA mortgage-backed  certificates
constitute  a general obligation of  the United States backed  by its full faith
and credit. The obligations of Fannie  Mae, including its obligations under  the
Fannie  Mae mortgage-backed securities, are obligations solely of Fannie Mae and
are not backed  by, or  entitled to,  the full faith  and credit  of the  United
States.
 
    INDUSTRIAL  REVENUE OBLIGATIONS.   Certain  of the Bonds  in a  Trust may be
industrial revenue bonds  ("IRBs"), including pollution  control revenue  bonds,
which  are  tax-exempt  securities  issued  by  states,  municipalities,  public
authorities or similar entities to  finance the cost of acquiring,  constructing
or improving various industrial projects. These projects are usually operated by
corporate entities. Issuers are obligated only to pay amounts due on the IRBs to
the  extent that funds are available from the unexpended proceeds of the IRBs or
receipts or revenues of the issuer  under an arrangement between the issuer  and
the  corporate operator of  a project. The arrangement  may be in  the form of a
lease, installment sale agreement, conditional sale agreement or loan agreement,
but in each case  the payments to  the issuer are designed  to be sufficient  to
meet  the payments  of amounts  due on  the IRBs.  Regardless of  the structure,
payment of IRBs is solely dependent  upon the creditworthiness of the  corporate
operator  of  the project  and,  if applicable,  corporate  guarantor. Corporate
operators or  guarantors may  be affected  by  many factors  which may  have  an
adverse  impact on  the credit  quality of  the particular  company or industry.
These include cyclicality of revenues and earnings, regulatory and environmental
restrictions, litigation  resulting  from  accidents  or  environmentally-caused
illnesses,  extensive competition  and financial deterioration  resulting from a
corporate restructuring pursuant to a leveraged buy-out, takeover or  otherwise.
Such  a restructuring may  result in the  operator of a  project becoming highly
leveraged which may have an impact on such operator's creditworthiness which  in
turn  would have  an adverse impact  on the  rating and/or market  value of such
Bonds. Further, the  possibility of  such a  restructuring may  have an  adverse
impact  on the market for and consequently  the value of such Bonds, even though
no actual takeover or other action is ever contemplated or effected. The IRBs in
a Trust may be subject to  special or extraordinary redemption provisions  which
may  provide for redemption  at par or,  in the case  of original issue discount
bonds, accreted value. The  Sponsor cannot predict the  causes or likelihood  of
the redemption of IRBs in a Trust prior to the stated maturity of such Bonds.
 
    ELECTRIC  UTILITY  OBLIGATIONS.    Some  of the  Bonds  in  a  Trust  may be
obligations of issuers  whose revenues are  primarily derived from  the sale  of
electric  energy. The problems  faced by such issuers  include the difficulty in
obtaining approval for timely  and adequate rate  increases from the  applicable
public  utility  commissions,  the difficulty  of  financing  large construction
programs, increased competition, reductions in estimates of
 
                                      A-3
<PAGE>
future demand for electricity in certain  areas of the country, the  limitations
on  operations  and increased  costs  and delays  attributable  to environmental
considerations, the difficulty of the capital market in absorbing utility  debt,
the  difficulty in obtaining fuel at reasonable  prices and the effect of energy
conservation. All  of  such issuers  have  been experiencing  certain  of  these
problems   in  varying  degrees.  In  addition,  Federal,  state  and  municipal
governmental authorities  may from  time  to time  review existing,  and  impose
additional,  regulations governing the licensing,  construction and operation of
nuclear power plants, which may adversely  affect the ability of the issuers  of
certain of the Bonds in a Trust to make payments of principal and/or interest on
such Bonds.
 
    TRANSPORTATION  FACILITY REVENUE BONDS.  Some of the Bonds in a Trust may be
obligations of issuers which  are payable from and  secured by revenues  derived
from  the ownership and operation of airports, public transit systems and ports.
The major portion of  an airport's gross operating  income is generally  derived
from  fees received  from airlines pursuant  to use agreements  which consist of
annual payments for airport  use, occupancy of  certain terminal space,  service
fees  and  leases. Airport  operating income  may therefore  be affected  by the
ability of the airlines to meet their obligations under the use agreements.  The
air  transport industry is  experiencing significant variations  in earnings and
traffic,  due  to  increased  competition,  excess  capacity,  increased  costs,
deregulation,  traffic constraints and  other factors, and  several airlines are
experiencing severe financial difficulties.  In particular, facilities with  use
agreements involving airlines experiencing financial difficulty may experience a
reduction  in revenue due  to the possible  inability of these  airlines to meet
their use  agreement  obligations because  of  such financial  difficulties  and
possible  bankruptcy.  The Sponsor  cannot  predict what  effect  these industry
conditions may have on airport revenues  which are dependent for payment on  the
financial  condition of the  airlines and their usage  of the particular airport
facility. Bonds that are secured primarily by the revenue collected by a  public
transit  system  typically are  additionally secured  by a  pledge of  sales tax
receipts collected  at  the state  or  local  level, or  of  other  governmental
financial assistance. Transit system net revenues will be affected by variations
in  utilization,  which  in  turn  may  be  affected  by  the  degree  of  local
governmental subsidization, demographic and  population shifts, and  competition
from  other forms  of transportation;  and by  increased costs,  including costs
resulting from previous deferrals of maintenance. Port authorities derive  their
revenues  primarily from fees imposed on ships using the facilities. The rate of
utilization of such facilities may fluctuate depending on the local economy  and
on  competition from  competing forms  of transportation  such as  air, rail and
trucks.
 
    WATER AND/OR SEWERAGE  OBLIGATIONS.  Some  of the  Bonds in a  Trust may  be
obligations  of issuers whose revenues are derived from the sale of water and/or
sewerage services. Such Bonds are generally payable from user fees. The problems
of such  issuers  include  the  ability  to  obtain  timely  and  adequate  rate
increases,  population decline resulting in  decreased user fees, the difficulty
of financing  large construction  programs, the  limitations on  operations  and
increased  costs and  delays attributable  to environmental  considerations, the
increasing difficulty of obtaining or  discovering new supplies of fresh  water,
the  effect  of  conservation  programs and  the  impact  of  "no-growth" zoning
ordinances. All of such issuers have been experiencing certain of these problems
in varying degrees.
 
    UNIVERSITY AND COLLEGE REVENUE  OBLIGATIONS.  Some of  the Bonds in a  Trust
may  be obligations  of issuers  which are,  or which  govern the  operation of,
colleges and universities and  whose revenues are  derived mainly from  tuition,
dormitory revenues, grants and
 
                                      A-4
<PAGE>
endowments. General problems of such issuers include the prospect of a declining
percentage  of the population consisting  of "college" age individuals, possible
inability to raise tuitions and  fees sufficiently to cover increased  operating
costs, the uncertainty of continued receipt of Federal grants and state funding,
and  government  legislation  or  regulations  which  may  adversely  affect the
revenues or costs of  such issuers. All of  such issuers have been  experiencing
certain of these problems in varying degrees.
 
    BRIDGE AUTHORITY AND TOLLROAD OBLIGATIONS.  Some of the Bonds in a Trust may
be  obligations  of issuers  which derive  their payments  from bridge,  road or
tunnel toll revenues. The revenues of such an issuer could be adversely affected
by competition from toll-free vehicular bridges and roads and alternative  modes
of transportation. Such revenues could also be adversely affected by a reduction
in  the availability of fuel to motorists  or significant increases in the costs
thereof. Specifically, governmental regulations restricting the use of  vehicles
in  the New  York City  metropolitan area may  adversely affect  revenues of the
Triborough Bridge and Tunnel Authority.
 
    DEDICATED-TAX SUPPORTED  BONDS.    Some of  the  Bonds  in a  Trust  may  be
obligations of issuers which are payable from and secured by tax revenues from a
designated  source, which revenues are pledged  to secure the bonds. The various
types of  Bonds described  below differ  in structure  and with  respect to  the
rights of the bondholders to the underlying property. Each type of dedicated-tax
supported  Bond has distinct risks, only some  of which are set forth below. One
type of dedicated-tax supported Bond is secured by the incremental tax  received
on  either real property or on  sales within a specifically defined geographical
area; such  tax  generally will  not  provide bondholders  with  a lien  on  the
underlying property or revenues. Another type of dedicated-tax supported Bond is
secured  by a special tax levied on  real property within a defined geographical
area in such  a manner  that the tax  is levied  on those who  benefit from  the
project;  such bonds  typically provide for  a statutory lien  on the underlying
property for unpaid taxes. A third  type of dedicated-tax supported Bond may  be
secured by a tax levied upon the manufacture, sale or consumption of commodities
or  upon the license to pursue  certain occupations or upon corporate privileges
within a taxing jurisdiction. As to any of these types of Bonds, the ability  of
the  designated revenues to satisfy the  interest and principal payments on such
bonds may be affected by changes in the local economy, the financial success  of
the  enterprise  responsible for  the payment  of  the taxes,  the value  of any
property on which taxes may be assessed and the ability to collect such taxes in
a timely fashion. Each  of these factors  will have a  different affect on  each
distinct type of dedicated-tax supported bonds.
 
    MUNICIPAL LEASE BONDS.  Some of the Bonds in a Trust may be obligations that
are  secured  by lease  payments  of a  governmental  entity. Such  payments are
normally subject to  annual budget  appropriations of  the leasing  governmental
entity.  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 obligation could
result  in insufficient funds  available for payment  of the obligations secured
thereby.
 
    ORIGINAL ISSUE  DISCOUNT BONDS  AND STRIPPED  OBLIGATIONS.   Certain of  the
Bonds  in a Trust may be original  issue discount bonds. These Bonds were issued
with nominal  interest rates  less than  the rates  then offered  by  comparable
securities and as a consequence were
 
                                      A-5
<PAGE>
originally  sold at a  discount from their  face, or par,  values. This original
issue discount,  the difference  between  the initial  purchase price  and  face
value,  is deemed under current  law to accrue on a  daily basis and the accrued
portion is  treated  as  tax-exempt  interest  income  for  federal  income  tax
purposes.  On sale or redemption, gain, if any, realized in excess of the earned
portion of original issue discount will be taxable as capital gain. See "What is
the Tax Status of Unitholders". The current value of an original issue  discount
bond  reflects the  present value of  its face  amount at maturity.  In a stable
interest rate environment, the market value  of an original issue discount  bond
would  tend to increase more slowly in  early years and in greater increments as
the bond approached maturity.
 
    Certain of the original issue discount bonds  in a Trust may be zero  coupon
bonds. Zero coupon bonds do not provide for the payment of any current interest;
the  buyer receives only the right to receive a final payment of the face amount
of the bond at its maturity. The effect  of owning a zero coupon bond 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  obligation.  This  implicit
reinvestment of earnings at the same rate eliminates the risk of being unable to
reinvest  the income on such obligation at a rate as high as the implicit yield,
but at the same time also eliminates the holder's ability to reinvest at  higher
rates  in  the  future.  For  this reason,  zero  coupon  bonds  are  subject to
substantially greater  price  fluctuations  during periods  of  changing  market
interest  rates  than are  securities of  comparable  quality that  pay interest
currently.
 
    Original issue discount bonds, including  zero coupon bonds, may be  subject
to  redemption at prices  based on the  issue price plus  the amount of original
issue  discount  accreted  to  redemption   (the  "accreted  value")  plus,   if
applicable,  some premium.  Pursuant to such  call provisions  an original issue
discount bond may be called prior to its maturity date at a price less than  its
face  value. See the  "Schedules of Investments" for  more information about the
call provisions of portfolio Bonds.
 
    Certain of the Bonds in a Trust may be Stripped Obligations, which represent
evidences of  ownership with  respect to  either the  principal amount  of or  a
payment  of interest on a tax-exempt  obligation. An obligation is "stripped" by
depositing it with  a custodian, which  then effects a  separation in  ownership
between  the bond and any interest payment which has not yet become payable, and
issues evidences of ownership with respect to such constituent parts. A Stripped
Obligation therefore has economic characteristics similar to zero coupon  bonds,
as described above.
 
    Each  Stripped Obligation has  been purchased at a  discount from the amount
payable at maturity. With respect to each Unitholder, the Internal Revenue  Code
treats  as "original issue discount" that portion of the discount which produces
a yield to maturity (as of the date of purchase of the Unitholder's Units) equal
to the lower of the coupon rate of interest on the underlying obligation or  the
yield  to maturity on the basis of  the purchase price of the Unitholder's Units
which is allocable to  each Stripped Obligation.  Original issue discount  which
accrues with respect to a Stripped Obligation will be exempt from Federal income
taxation  to the  same extent  as interest  on the  underlying obligations. (See
Section 11, " What Is The Tax Status of Unitholders".)
 
    Unitholders should consult their own tax advisers with respect to the  state
and  local tax consequences of owning  original issue discount bonds or Stripped
Obligations. Under applicable  provisions governing determination  of state  and
local taxes, interest on original
 
                                      A-6
<PAGE>
issue discount bonds or Stripped Obligations may be deemed to be received in the
year of accrual even though there is no corresponding cash payment.
 
4.  COMPOSITION OF TRUSTS
 
Each  Trust initially consists  of delivery statements  relating to contracts to
purchase Bonds (or of such Bonds) as are listed under "Schedules of Investments"
and, thereafter, of  such Bonds as  may continue to  be held from  time to  time
(including  certain securities deposited in the  Trust in substitution for Bonds
not delivered to the Trust or in exchange or substitution for Bonds upon certain
refundings), together  with  accrued  and  undistributed  interest  thereon  and
undistributed cash realized from the disposition of Bonds.
 
    "WHEN-ISSUED"  AND  "DELAYED  DELIVERY"  TRANSACTIONS.    The  contracts  to
purchase Bonds delivered to  the Trustee represent an  obligation by issuers  or
dealers  to deliver Bonds  to the Sponsor  for deposit in  the Trusts. Normally,
"regular way"  contracts are  settled and  the Bonds  delivered to  the  Trustee
within  a relatively  short period  of time.  However, certain  of the contracts
relate to Bonds which have not been issued  as of the Date of Deposit and  which
are  commonly referred to  as "when issued"  or "when, as  and if issued" Bonds.
Although the Sponsor does not believe it  is likely, one or more of the  issuers
of such Bonds might decide not to proceed with such offerings. If such Bonds, or
replacement  bonds described  below, are  not acquired  by a  Trust or  if their
delivery is  delayed, the  Estimated  Current Returns  and Estimated  Long  Term
Returns  shown herein may be reduced. Certain  of the contracts for the purchase
of Bonds provide for delivery dates  after the date of settlement for  purchases
made  on  the Date  of  Deposit. Interest  on  such "when  issued"  and "delayed
delivery" Bonds accrues to the benefit of Unitholders commencing with the  first
settlement  date for the Units. However,  in the opinion of counsel, Unitholders
who purchase their Units prior to the date such Bonds are actually delivered  to
the  Trustee must reduce the  tax basis of their  Units for interest accruing on
such Bonds during the interval between their purchase of Units and the  delivery
of  the Bonds because such amounts constitute a return of principal. As a result
of such adjustment, the  Estimated Current Returns set  forth herein (which  are
based  on the Public Offering Price as of  the business day prior to the Date of
Deposit) may be  slightly lower than  Unitholders will receive  after the  first
year,  assuming the Portfolio does not  change and estimated annual expense does
not vary from that set forth under "Essential Information Regarding the Trusts."
Those Bonds  in each  Trust purchased  with  delivery dates  after the  date  of
settlement  for  purchases made  on  the Date  of Deposit  are  so noted  in the
Schedules of Investments.
 
    LIMITED REPLACEMENT OF CERTAIN BONDS.   Neither the Sponsor nor the  Trustee
shall  be liable in any way  for any default, failure or  defect in any Bond. In
the event of a failure to deliver any  Bond that has been purchased for a  Trust
under  a contract, including those  Bonds purchased on a  when, as and if issued
basis ("Failed Bonds"), the Sponsor is authorized under the Indenture to  direct
the  Trustee to acquire  other specified Bonds ("Replacement  Bonds") to make up
the original corpus of the Trust. The Replacement Bonds must be purchased within
20 days after  delivery of notice  of the failed  contract and the  cost to  the
Trust  (exclusive  of  accrued interest)  may  not  exceed the  amount  of funds
reserved for the purchase  of the Failed Bonds.  The Replacement Bonds (i)  must
satisfy  the criteria previously described for  Bonds originally included in the
Trust and, with respect  to Bonds purchased  for a State  Trust, shall have  the
benefit of an exemption from state taxation of interest to an extent equal to or
greater  than that of  the Bonds they  replace, (ii) must  have a fixed maturity
date after the date of purchase of  not less than approximately 15 years in  the
case  of National or State Trusts, approximately 11  years in the case of a Long
Intermediate Trust, approximately 5 years in  the case of Intermediate or  State
Intermediate  Trusts, approximately 3 years in  the case of a Short Intermediate
Trust and
 
                                      A-7
<PAGE>
approximately 1 year in the case of a  Short Term Trust, but not later than  the
maturity date of the Failed Bonds, (iii) must be acquired at a cost to the Trust
equal  to the cost of the same principal  amount of Bonds provided in the failed
contract and have  a current  return and  yield to  maturity not  less than  the
current  return and yield to maturity of the  Failed Bonds and (iv) shall not be
"when, as and if  issued" Bonds. Whenever a  Replacement Bond has been  acquired
for  a Trust, the  Trustee shall, within  five days after  the delivery thereof,
mail or deliver a  notice of such  acquisition to all  Unitholders of the  Trust
involved.  Once the original corpus  of the Trust is  acquired, the Trustee will
have no power to vary the investment of the Trust; i.e., the Trust will have  no
managerial power to take advantage of market variation to improve a Unitholder's
investment.
 
    To  the extent the right of  limited substitution described in the preceding
paragraph shall not  be utilized  to acquire  Replacement Bonds  for the  entire
principal amount of Failed Bonds, the Sponsor shall refund to all Unitholders of
the  Trust  involved the  sales  charge attributable  to  such Failed  Bonds not
replaced, and  the principal  and accrued  interest attributable  to such  Bonds
shall  be distributed  not more  than 30  days after  the determination  of such
failure or at such earlier time as  the Trustee in its sole discretion deems  to
be  in  the interest  of  the Unitholders.  Any  such accrued  interest  paid to
Unitholders will be paid by the Sponsor and, accordingly, will not be treated as
tax-exempt income. In the event Failed Bonds  in a Trust could not be  replaced,
the  Net Annual Interest Income per Unit for such Trust would be reduced and the
Estimated Current Return thereon might be lowered.
 
    SALE, MATURITY AND REDEMPTION OF BONDS.  Certain of the Bonds may from  time
to  time  under certain  circumstances be  sold  or redeemed  or will  mature in
accordance with their terms. The proceeds from  such events will be used to  pay
for   Units  redeemed  or   distributed  to  Unitholders   and  not  reinvested;
accordingly, no assurance can be given that  a Trust will retain for any  length
of time its present size and composition.
 
    All  of the Bonds in  each Trust are subject to  being called or redeemed in
whole or  in part  prior to  their stated  maturities pursuant  to the  optional
redemption  provisions described in  the "Schedules of  Investments" and in most
cases pursuant to sinking fund, special or extraordinary redemption  provisions.
A  bond  subject to  optional  call 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 bond issue is redeemed, at  or before maturity, by the proceeds of  a
new  bond  issue. A  bond subject  to sinking  fund redemption  is one  which is
subject to  partial call  from time  to time  from a  fund accumulated  for  the
scheduled  retirement of  a portion  of an issue  prior to  maturity. Special or
extraordinary redemption  provisions may  provide  for redemption  of all  or  a
portion  of an  issue upon  the occurrence  of certain  circumstances related to
defaults or unanticipated changes  in circumstances. Events  that may permit  or
require  the special or extraordinary redemption of bonds include, among others:
substantial damage to or  destruction of the project  for which the proceeds  of
the  bonds were used; exercise by a local, state or federal governmental unit of
its power of eminent domain to take all or substantially all of the project  for
which  the  proceeds of  the bonds  were  used; a  final determination  that the
interest on the bonds  is taxable; changes in  the economic availability of  raw
materials,  operating supplies or  facilities or technological  or other changes
which render the operation of  the project for which  the proceeds of the  bonds
were  used uneconomical; changes in law  or an administrative or judicial decree
which render the performance  of the agreement under  which the proceeds of  the
bonds  were made  available to  finance the  project impossible  or which create
unreasonable burdens or which impose  excessive liabilities, such as taxes,  not
imposed  on the date the bonds are issued on the issuer of the bonds or the user
of the  proceeds  of the  bonds;  an  administrative or  judicial  decree  which
requires  the cessation of a  substantial part of the  operations of the project
financed with the proceeds of the bonds;
 
                                      A-8
<PAGE>
an overestimate of the costs of the project to be financed with the proceeds  of
the  bonds resulting in excess proceeds which may be applied to redeem bonds; or
an underestimate of  a source of  funds securing the  bonds resulting in  excess
funds which may be applied to redeem bonds. The Sponsor is unable to predict all
of  the circumstances which may result in  such redemption of an issue of Bonds.
See the discussion of the various  types of bond issues, above, for  information
on  the  call  provisions of  such  bonds, particularly  single  family mortgage
revenue bonds.
 
    The exercise of redemption or call provisions will (except to the extent the
proceeds of the called Bonds are used to pay for Unit redemptions) result in the
distribution of  principal  and may  result  in a  reduction  in the  amount  of
subsequent  interest distributions;  it may  also affect  the current  return on
Units of the Trust involved. Redemption pursuant to optional call provisions  is
more  likely to  occur, and  redemption pursuant to  sinking fund  or special or
extraordinary redemption provisions may occur,  when the Bonds have an  offering
side  evaluation which  represents a  premium over  par. Redemption  pursuant to
optional call provisions  may be,  and redemption  pursuant to  sinking fund  or
special or extraordinary redemption provisions is likely to be, at a price equal
to the par value of the bonds without any premium (in the case of original issue
discount  bonds, such redemption is generally to be made at the issue price plus
the amount of original issue discount  accreted to the date of redemption;  such
price  is referred to herein  as "accreted value"). Because  Bonds may have been
valued at prices above or below par value or the then current accreted value  at
the  time Units were  purchased, Unitholders may  realize gain or  loss upon the
redemption of portfolio  Bonds. (See Sections  11 and 13  and the "Schedules  of
Investments.")
 
    CERTAIN  TAX  MATTERS;  LITIGATION.   Certain  of  the Bonds  in  each Trust
portfolio may be subject  to continuing requirements such  as the actual use  of
bond proceeds, manner of operation of the project financed from bond proceeds or
rebate  of excess  earnings on  bond proceeds that  may affect  the exemption of
interest on such  Bonds from Federal  income taxation. Although  at the time  of
issuance  of each  of the  Bonds in each  Trust an  opinion of  bond counsel was
rendered as to the exemption of interest on such obligations from Federal income
taxation, and the issuers covenanted  to comply with all requirements  necessary
to retain the tax-exempt status of the Bonds, there can be no assurance that the
respective  issuers  or  other obligors  on  such obligations  will  fulfill the
various continuing  requirements  established  upon issuance  of  the  Bonds.  A
failure to comply with such requirements may cause a determination that interest
on  such  obligations  is  subject  to  Federal  income  taxation,  perhaps even
retroactively from the  date of  issuance of  such Bonds,  thereby reducing  the
value of the Bonds and subjecting Unitholders to unanticipated tax liabilities.
 
    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  on any of  the Trusts. It  is possible that
after the Date of Deposit, litigation may be initiated with respect to Bonds  in
any  Trust. Any  such litigation may  affect the  validity of such  Bonds or the
tax-exempt nature of the interest thereon,  but while the outcome of  litigation
of  such nature can never be entirely predicted, the opinions of bond counsel to
the issuer of  each Bond  on the  date of issuance  state that  such Bonds  were
validly issued and that the interest thereon is, to the extent indicated, exempt
from Federal income tax.
 
                                      A-9
<PAGE>
5.  WHY AND HOW ARE THE BONDS INSURED?
 
INSURANCE ON BONDS IN INSURED TRUSTS
 
Insurance  guaranteeing  the  timely payment,  when  due, of  all  principal and
interest on the Bonds in each Insured Trust has been obtained by the Sponsor  or
by the issuers or underwriters of Bonds from the MBIA Insurance Corporation (the
"Insurer").  Some of the Bonds in each Insured  Trust may be covered by a policy
or policies of insurance  obtained by the issuers  or underwriters of the  Bonds
from  Municipal Bond Insurance Association (the "Association") or Bond Investors
Guaranty Insurance Company ("BIG"). The Insurer has issued a policy or  policies
of  insurance covering each of  the Bonds in the  Insured Trusts, each policy to
remain in force until the payment in full  of such Bonds and whether or not  the
Bonds  continue to be held by an Insured  Trust. By the terms of each policy the
Insurer will unconditionally guarantee to the holders or owners of the Bonds the
payment, when due, required of the issuer of the Bonds of an amount equal to the
principal of and interest on the Bonds as such payments shall become due but not
be paid  (except that  in the  event  of any  acceleration of  the due  date  of
principal  by reason of mandatory or  optional redemption, default or otherwise,
the payments guaranteed will be made in such amounts and at such times as  would
have  been  due  had  there  not been  an  acceleration).  The  Insurer  will be
responsible for  such payments,  less any  amounts received  by the  holders  or
owners  of the  Bonds from any  trustee for the  bond issuers or  from any other
sources other  than  the  Insurer.  The Insurer's  policies  relating  to  small
industrial  development bonds and pollution control revenue bonds also guarantee
the full and complete payments required to be made by or on behalf of an  issuer
of  Bonds pursuant  to the  terms of the  Bonds if  there occurs  an event which
results in the  loss of the  tax-exempt status  of the interest  on such  Bonds,
including  principal, interest or premium payments,  if any, as and when thereby
required. The Insurer has  indicated that its insurance  policies do not  insure
the  payment of principal or interest on bonds which are not required to be paid
by the issuer thereof  because the bonds were  not validly issued; as  indicated
under   "What  is  the  Tax  Status  of  Unitholders?"  the  respective  issuing
authorities have  received  opinions  of  bond counsel  relating  to  the  valid
issuance  of each of the Bonds in  the Insured Trusts. The Insurer's policy also
does not insure  against non-payment of  principal of or  interest on the  Bonds
resulting  from the insolvency, negligence  or any other act  or omission of the
trustee or other paying agent  for the Bonds. The policy  is not covered by  the
Property/Casualty  Insurance Security  Fund specified in  Article 76  of the New
York Insurance Law. The policies are non-cancellable and the insurance  premiums
have  been fully paid on or prior to  the Date of Deposit, either by the Sponsor
or, if a policy has been obtained by a Bond issuer, by such issuer.
 
    Upon notification from  the trustee  for any bond  issuer or  any holder  or
owner of the Bonds or coupons that such trustee or paying agent has insufficient
funds  to pay any  principal or interest in  full when due,  the Insurer will be
obligated to deposit funds  promptly with State Street  Bank and Trust  Company,
N.A.,  New York, New York, as fiscal  agent for the Insurer, sufficient to fully
cover the deficit. If notice of nonpayment is received on or after the due date,
the Insurer will provide for payment  within one business day following  receipt
of  the notice. Upon payment  by the Insurer of  any Bonds, coupons, or interest
payments, the Insurer shall succeed  to the rights of  the owner of such  Bonds,
coupons or interest payments with respect thereto.
 
    The   Insurer,  formerly   known  as  Municipal   Bond  Investors  Assurance
Corporation, is the  principal operating subsidiary  of MBIA, Inc.,  a New  York
Stock  Exchange listed company. MBIA, Inc. is  not obligated to pay the debts of
or claims against the  Insurer. The Insurer is  a limited liability  corporation
rather  than a  several liability association.  The Insurer is  domiciled in the
State of New York  and licensed to  do business in all  50 states, the  District
 
                                      A-10
<PAGE>
of  Columbia, the Commonwealth of Puerto  Rico, the Commonwealth of the Northern
Mariana Islands, the Virgin  Islands of the United  States and the Territory  of
Guam. The Insurer has one European branch in the Republic of France.
 
    As  of  March 31,  1995  the Insurer  had  admitted assets  of  $3.5 billion
(unaudited), total liabilities  of $2.4 billion  (unaudited), and total  capital
and  surplus of $1.1 billion (unaudited) determined in accordance with statutory
accounting  practices   prescribed   or  permitted   by   insurance   regulatory
authorities.  As of December 31,  1994, the Insurer had  admitted assets of $3.4
billion (audited),  total  liabilities  of $2.3  billion  (audited),  and  total
capital  and surplus  of $1.1  billion (audited)  determined in  accordance with
statutory accounting practices prescribed  or permitted by insurance  regulatory
authorities.  Copies of the Insurer's year  end financial statements prepared in
accordance with statutory accounting practices  are available from the  Insurer.
The address of the Insurer is 113 King Street, Armonk, New York 10504.
 
    Each  insurance company comprising the Association will be severally and not
jointly obligated  under  the Association  policy  in the  following  respective
percentages:  The  AEtna  Casualty  and  Surety  Company,  33%;  Fireman's  Fund
Insurance Company, 30%;  The Travelers Indemnity  Company, 15%; AEtna  Insurance
Company  (now  known  as CIGNA  Property  and  Casualty Company),  12%;  and The
Continental Insurance Company, 10%.  As a several  obligor, each such  insurance
company  will be  obligated only to  the extent  of its percentage  of any claim
under the  Association  policy and  will  not be  obligated  to pay  any  unpaid
obligation  of any  other member  of the  Association. Each  insurance company's
participation is backed by all of its assets. However, each insurance company is
a multiline insurer involved in several lines of insurance other than  municipal
bond  insurance, and the assets of each insurance company also secure all of its
other insurance policy and surety bond obligations.
 
    The following table sets forth certain unaudited financial information  with
respect  to  the  five  insurance  companies  comprising  the  Association.  The
statistics, which have been furnished by the Association, are as reported by the
insurance  companies  to  the  New  York  State  Insurance  Department  and  are
determined in accordance with statutory accounting principles. 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  date
thereof.  In addition,  these numbers  are subject to  revision by  the New York
State Insurance Department which, if revised, could either increase or  decrease
the amounts.
 
                      MUNICIPAL BOND INSURANCE ASSOCIATION
      FIVE MEMBER COMPANIES ASSETS AND POLICYHOLDERS' SURPLUS (UNAUDITED)
                           AS OF SEPTEMBER 30, 1994.
                                (000'S OMITTED)
 
<TABLE>
<CAPTION>
                                                              NEW YORK         NEW YORK         NEW YORK
                                                              STATUTORY        STATUTORY     POLICYHOLDERS
                                                               ASSETS         LIABILITIES       SURPLUS
                                                           ---------------  ---------------  --------------
<S>                                                        <C>              <C>              <C>
The AEtna Casualty & Surety Company......................  $    10,030,200  $     8,275,300   $  1,754,900
Fireman's Fund Insurance Company.........................        6,815,775        4,904,534      1,911,241
The Travelers Indemnity Company..........................       10,295,359        8,515,392      1,779,967
CIGNA Property and Casualty Company (formerly AEtna
  Insurance Company).....................................        5,112,251        4,842,235        270,016
The Continental Insurance Company........................        2,794,536        2,449,805        344,731
                                                           ---------------  ---------------  --------------
        Total............................................  $    35,048,121  $    28,987,266   $  6,060,855
                                                           ---------------  ---------------  --------------
                                                           ---------------  ---------------  --------------
</TABLE>
 
    Standard  & Poor's  rates all  new issues  insured by  the Association "AAA"
Prime Grade.
 
                                      A-11
<PAGE>
    Moody's rates all  bond issues insured  by the Association  "Aaa" and  short
term loans "MIG 1", both designated to be of the highest quality.
 
    Each  such rating should be evaluated  independently of any other rating. No
application has  been  made  to any  other  rating  agency in  order  to  obtain
additional  ratings  on the  Bonds. The  ratings  reflect the  respective rating
agency's current assessment of the  creditworthiness of the Association and  its
ability  to pay claims on its policies  of insurance. Any further explanation as
to the  significance  of  the  above  ratings may  be  obtained  only  from  the
applicable rating agency.
 
    Moody's  rates all bond  issues insured by the  Insurer "Aaa" and short-term
loans "MIG 1," both designated to be of the highest quality.
 
    Standard & Poor's rates  all new issues insured  by the Insurer "AAA"  Prime
Grade."
 
    The  Moody's rating of the Insurer  should be evaluated independently of the
Standard & Poor's rating  of the Insurer.  No application has  been made to  any
other  rating agency  in order  to obtain additional  ratings on  the Bonds. The
ratings reflect  the  respective  rating  agency's  current  assessment  of  the
creditworthiness of the Insurer and its ability to pay claims on its policies of
insurance  (See "Description  of Ratings.")  Any further  explanation as  to the
significance of  the above  ratings may  be obtained  only from  the  applicable
rating agency.
 
    The  above ratings are not  recommendations to buy, sell  or hold the Bonds,
and such ratings may  be subject to  revision or withdrawal at  any time by  the
rating  agencies. Any downward revision or  withdrawal of either or both ratings
may have an adverse effect  on the market price of  the Bonds. The Insurer  does
not  guarantee the  market price  of the  Bonds nor  does it  guarantee that the
ratings on the Bonds will not be reversed or withdrawn.
 
    Because the insurance on the  Bonds will be effective  so long as the  Bonds
are  outstanding, such insurance  will be taken into  account in determining the
market value  of  the  Bonds  and therefore  some  value  attributable  to  such
insurance  will be included in the value of the Units of the Insured Trusts. The
insurance does not, however, guarantee the market  value of the Bonds or of  the
Units.
 
INSURANCE ON CERTAIN BONDS IN TRADITIONAL TRUSTS
 
    Insurance  guaranteeing the timely  payment, when due,  of all principal and
interest on certain Bonds in a Traditional  Trust may have been obtained by  the
Sponsor,  issuer or underwriter  of the particular Bonds  involved or by another
party. Such insurance, which  provides coverage substantially  the same as  that
obtained  with  respect  to  Bonds  in Insured  Trusts  as  described  above, is
effective so long as the insured Bond is outstanding and the insurer remains  in
business.  Insurance relates only  to the particular  Bond and not  to the Units
offered hereby or to their market value. Insured Bonds have received a rating of
"Aaa" by  Moody's and/or  "AAA" by  Standard  & Poor's  in recognition  of  such
insurance.
 
    If  a Bond in  a Traditional Trust  is insured, the  Schedule of Investments
will identify the insurer. Such insurance will be provided by Financial Guaranty
Insurance  Company  ("FGIC"),  AMBAC   Indemnity  Corporation  ("AMBAC"),   Bond
Investors  Guaranty  Insurance  Company, now  known  as MBIA  Corp.  of Illinois
("BIG"),  Capital  Guaranty  Insurance  Company  ("CGIC"),  Financial   Security
Assurance,   Inc.   ("FSA"),   Municipal   Bond   Insurance   Association   (the
"Association"), MBIA  Insurance Corporation  ("MBIA")  or Connie  Lee  Insurance
Company  ("ConnieLee"). The Sponsor to date  has purchased and presently intends
to purchase insurance for Bonds in Traditional Trusts exclusively from MBIA (see
 
                                      A-12
<PAGE>
the preceding disclosure  regarding MBIA). There  can be no  assurance that  any
insurer  listed therein  will be  able to satisfy  its commitments  in the event
claims are  made  in  the future.  However,  Standard  & Poor's  has  rated  the
claims-paying  ability of  each insurer "AAA,"  and Moody's has  rated all bonds
insured by each such insurer, except ConnieLee, "Aaa." Moody's gives no  ratings
for bonds insured by ConnieLee.
 
    Because  any such insurance will  be effective so long  as the insured Bonds
are outstanding, such insurance  will be taken into  account in determining  the
market  value  of  such Bonds  and  therefore  some value  attributable  to such
insurance will be included in the value of the Units of the Trust that  includes
such  Bonds. The insurance does not, however,  guarantee the market value of the
Bonds or of the Units.
 
6.  HOW IS THE PUBLIC OFFERING PRICE DETERMINED?
 
The Public Offering Price of the Units  of each Trust is equal to the  Trustee's
determination  of the aggregate  OFFERING prices of  the Bonds deposited therein
(minus any  advancement  to the  principal  account of  the  Trust made  by  the
Trustee)  plus a sales charge of 5.152%  of the aggregate offering prices in the
case of National and  State Trusts, 4.439% of  the aggregate offering prices  in
the case of Long Intermediate Trusts, 4.058% of the aggregate offering prices in
the  case of Intermediate Trusts, 3.093% of the aggregate offering prices in the
case of Short Intermediate Trusts and 2.564% of the aggregate offering prices in
the case of Short  Term Trusts, in  each case adding to  the total thereof  cash
held  by the Trust,  if any, and dividing  the sum so obtained  by the number of
Units outstanding in the Trust.  This computation produces a gross  underwriting
profit  equal to 4.90% of the Public Offering  Price in the case of National and
State  Trusts,  4.25%  of  the  Public  Offering  Price  in  the  case  of  Long
Intermediate  Trusts,  3.90%  of  the  Public  Offering  Price  in  the  case of
Intermediate Trusts, 3.00%  of the Public  Offering Price in  the case of  Short
Intermediate  Trusts and 2.50% of the Public Offering Price in the case of Short
Term Trusts.
 
    The sales charge applicable to quantity purchases is reduced on a  graduated
scale  for sales to any purchaser  of at least $50,000 or  500 Units and will be
applied on whichever basis is more  favorable to the purchaser. For purposes  of
calculating  the applicable  sales charge,  purchasers who  have indicated their
intent to purchase a specified amount of Units of any Trust described herein  in
the  primary or secondary offering period or units of any other series of Nuveen
Tax-Exempt Unit Trusts in the primary or secondary offering period by  executing
and delivering a letter of intent to the Sponsor, which letter of intent must be
in  a  form acceptable  to  the Sponsor  and shall  have  a maximum  duration of
thirteen months, will be eligible to receive a reduced sales charge according to
the following tables  based on  the amount  of intended  aggregate purchases  as
expressed  in the  letter of  intent. Due  to administrative  limitations and in
order to permit adequate tracking, the only secondary market purchases that will
be permitted to be  applied toward the intended  specified amount and that  will
receive the corresponding reduced sales charge are those Units that are acquired
through  or from the Sponsor.  By establishing a letter  of intent, a Unitholder
agrees that the first purchase of  Units following the execution of such  letter
of  intent will  be at least  5% of the  total amount of  the intended aggregate
purchases expressed in such Unitholder's letter of intent. Further, through  the
establishment  of  the  letter  of intent,  such  Unitholder  agrees  that units
representing 5% of the total  amount of the intended  purchases will be held  in
escrow  by United States Trust  Company of New York  pending completion of these
purchases. All distributions on  units held in escrow  will be credited to  such
Unitholder's  account. If total purchases prior  to the expiration of the letter
of intent period equal or exceed  the amount specified in a Unitholder's  letter
of  intent, the units  held in escrow  will be transferred  to such Unitholder's
account. If  the  total  purchases  are less  than  the  amount  specified,  the
Unitholder  involved  must pay  the Sponsor  an amount  equal to  the difference
between the amounts paid for these purchases and the
 
                                      A-13
<PAGE>
amounts which would have been paid if the higher sales charge had been  applied.
If  such Unitholder  does not  pay the  additional amount  within 20  days after
written request by  the Sponsor or  the Unitholder's securities  representative,
the  Sponsor will instruct  the Trustee to  redeem an appropriate  number of the
escrowed units to meet the required payment. By establishing a letter of intent,
a Unitholder irrevocably appoints the  Sponsor as attorney to give  instructions
to  redeem any or  all of such  Unitholder's escrowed units,  with full power of
substitution in the premises. A Unitholder or his securities representative must
notify the Sponsor whenever  such Unitholder makes a  purchase of Units that  he
wishes  to  be counted  towards the  intended amount.  Sales charges  during the
primary offering period are as follows:
 
<TABLE>
<CAPTION>
                                                         NATIONAL AND STATE      LONG INTERMEDIATE
                                                               TRUSTS                  TRUSTS           INTERMEDIATE TRUSTS
                                                       ----------------------  ----------------------  ----------------------
<S>                                                    <C>          <C>        <C>          <C>        <C>          <C>
                                                         PERCENT     PERCENT     PERCENT     PERCENT     PERCENT     PERCENT
                                                           OF        OF NET        OF        OF NET        OF        OF NET
                                                        OFFERING     AMOUNT     OFFERING     AMOUNT     OFFERING     AMOUNT
                  NUMBER OF UNITS*                        PRICE     INVESTED      PRICE     INVESTED      PRICE     INVESTED
-----------------------------------------------------  -----------  ---------  -----------  ---------  -----------  ---------
Less than 500........................................        4.90%      5.152%       4.25%      4.439%       3.90%      4.058%
500 but less than 1,000..............................        4.75       4.987        4.15       4.330        3.70       3.842
1,000 but less than 2,500............................        4.50       4.712        3.85       4.004        3.50       3.627
2,500 but less than 5,000............................        4.25       4.439        3.60       3.734        3.25       3.359
5,000 but less than 10,000...........................        3.50       3.627        3.35       3.466        3.00       3.093
10,000 but less than 25,000..........................        3.00       3.093        3.00       3.093        2.75       2.828
25,000 but less than 50,000..........................        2.50       2.564        2.50       2.564        2.50       2.564
50,000 or more.......................................        2.00       2.041        2.00       2.041        2.00       2.041
</TABLE>
 
<TABLE>
<CAPTION>
                                                         SHORT INTERMEDIATE
                                                               TRUSTS            SHORT TERM TRUSTS
                                                       ----------------------  ----------------------
<S>                                                    <C>          <C>        <C>          <C>        <C>          <C>
                                                         PERCENT     PERCENT     PERCENT     PERCENT
                                                           OF        OF NET        OF        OF NET
                                                        OFFERING     AMOUNT     OFFERING     AMOUNT
                  NUMBER OF UNITS*                        PRICE     INVESTED      PRICE     INVESTED
-----------------------------------------------------  -----------  ---------  -----------  ---------
Less than 500........................................        3.00%      3.093%       2.50%      2.564%
500 but less than 1,000..............................        2.80       2.881        2.30       2.354
1,000 but less than 2,500............................        2.60       2.670        2.10       2.145
2,500 but less than 5,000............................        2.35       2.407        1.85       1.885
5,000 but less than 10,000...........................        2.10       2.145        1.60       1.626
10,000 but less than 25,000..........................        1.85       1.885        1.35       1.368
25,000 but less than 50,000..........................        1.80       1.833        1.25       1.266
50,000 or more.......................................        1.50       1.523        1.15       1.163
</TABLE>
 
*Breakpoint sales charges are computed both on  a dollar basis and on the  basis
 of the number of Units purchased, using the equivalent of 500 Units to $50,000,
 2,500  Units to $250,000 etc., and will be  applied on that basis which is more
 favorable to the purchaser.
 
    For "secondary market"  sales the  Public Offering  Price per  Unit of  each
Trust is determined by adding to the Trustee's determination of the BID price of
each  Bond in the Trust  a sales charge determined  in accordance with the table
set forth below based upon the number of years remaining to the maturity of each
such Bond, adjusting  the total to  reflect the amount  of any cash  held in  or
advanced  to the principal account  of the Trust and  dividing the result by the
number of Units then outstanding. For  purposes of this calculation, Bonds  will
be  deemed to mature on  their stated maturity dates  unless: (a) the Bonds have
been called for redemption or funds or securities have been placed in escrow  to
redeem  them on  an earlier  call date, in  which case  such call  date shall be
deemed to be the date upon which they mature; or (b) such Bonds are subject to a
"mandatory put," in which case such mandatory put date shall be deemed to be the
date upon  which  they  mature.  Any assumptions  regarding  maturity  made  for
purposes  of  determining the  appropriate  sales charge  in  no way  predict or
guarantee the actual remaining life of a given Trust.
 
    Pursuant to the terms of the Indenture, the Trustee may terminate a Trust if
the net asset value of such Trust, as shown by any evaluation, is less than  20%
of the original
 
                                      A-14
<PAGE>
principal  amount of the Trust. In the  course of regularly appraising the value
of Bonds in each Trust, the Sponsor will attempt to estimate the date on which a
Trust's value will  fall below the  20% level based  on anticipated bond  events
over a five year period, including maturities, escrow calls and current calls or
refundings, assuming certain market rates. The Sponsor intends from time to time
to  recommend that certain Trusts whose values have fallen or are anticipated to
fall below the  20% level be  terminated based on  certain criteria which  could
adversely  affect the Trust's  diversification. Once the  Sponsor has determined
that a Trust's  value has or  may fall below  the 20% level  within a  five-year
period,  for purposes of  computing the sales  charge using the  table set forth
below, the maturity of each bond in such Trust will be deemed to be the  earlier
of  the estimated termination  date of the  Trust, or the  actual date used when
pricing  the  bond  under  Municipal  Securities  Rulemaking  Board  rules   and
interpretations issued thereunder.
 
    The effect of this method of sales charge calculation will be that different
sales  charge rates will  be applied to  the various Bonds  in a Trust portfolio
based upon  the maturities  of  such Bonds,  in  accordance with  the  following
schedule.  As  shown, the  sales charge  on  Bonds in  each maturity  range (and
therefore the aggregate sales charge on the purchase) is reduced with respect to
purchases of at least $50,000 or 500 Units:
<TABLE>
<CAPTION>
                                                                  AMOUNT OF PURCHASE*
                             ---------------------------------------------------------------------------------------------
<S>                          <C>          <C>          <C>          <C>          <C>          <C>            <C>
                                            $50,000     $100,000     $250,000     $500,000     $1,000,000     $2,500,000
                                UNDER         TO           TO           TO           TO            TO             TO
YEARS TO MATURITY              $50,000      $99,999     $249,999     $499,999     $999,999     $2,499,999     $4,999,999
---------------------------  -----------  -----------  -----------  -----------  -----------  -------------  -------------
Less than 1................           0            0            0            0            0             0              0
1 but less than 2..........       1.523%       1.446%       1.369%       1.317%       1.215%        1.061%          .900%
2 but less than 3..........       2.041        1.937        1.833        1.729        1.626         1.420          1.225
3 but less than 4..........       2.564        2.433        2.302        2.175        2.041         1.781          1.546
4 but less than 5..........       3.093        2.961        2.828        2.617        2.459         2.175          1.883
5 but less than 7..........       3.627        3.433        3.239        3.093        2.881         2.460          2.165
7 but less than 10.........       4.167        3.951        3.734        3.520        3.239         2.828          2.489
10 but less than 13........       4.712        4.467        4.221        4.004        3.788         3.253          2.842
13 but less than 16........       5.263        4.988        4.712        4.439        4.167         3.627          3.169
16 or more.................       5.820        5.542        5.263        4.987        4.603         4.004          3.500
 
<CAPTION>
 
<S>                          <C>
 
                              $5,000,000
YEARS TO MATURITY               OR MORE
---------------------------  -------------
Less than 1................            0
1 but less than 2..........         .750%
2 but less than 3..........        1.030
3 but less than 4..........        1.310
4 but less than 5..........        1.590
5 but less than 7..........        1.870
7 but less than 10.........        2.150
10 but less than 13........        2.430
13 but less than 16........        2.710
16 or more.................        3.000
</TABLE>
 
 *Breakpoint sales charges are computed both on a dollar basis and on the  basis
  of  the  number of  Units  purchased, using  the  equivalent of  500  Units to
  $50,000, 2,500 Units  to $250,000,  etc., and will  be applied  on that  basis
  which is more favorable to the purchaser.
 
    The  secondary market sales charges above are  expressed as a percent of the
net amount invested; expressed  as a percent of  the Public Offering Price,  the
maximum  sales charge on  any Trust, including one  consisting entirely of Bonds
with 16 years  or more to  maturity, would be  5.50% (5.820% of  the net  amount
invested).  For purposes of illustration, the sales charge on a Trust consisting
entirely of Bonds  maturing in 13  to 16 years  would be 5%  (5.263% of the  net
amount  invested); that on a Trust consisting entirely of Bonds maturing in five
to seven years would be 3.5% (3.627% of the net amount invested); and that on  a
Trust consisting entirely of Bonds maturing in three to four years would be 2.5%
(2.564%  of the net  amount invested). The actual  secondary market sales charge
included in the Public Offering Price of any particular Trust will depend on the
maturities of the Bonds in the portfolio of such Trust.
 
    At all  times while  Units are  being  offered for  sale, the  Sponsor  will
appraise  or cause to  be appraised daily  the value of  the underlying Bonds in
each Trust as of 4:00 p.m. eastern time on each day on which the New York  Stock
Exchange  (the "Exchange") is normally open  and will adjust the Public Offering
Price of the Units commensurate with such appraisal. Such Public Offering  Price
will be effective for all orders received by a dealer or the Sponsor at or prior
to  4:00 p.m. eastern time on each such day. Orders received after that time, or
on a day when the Exchange is closed for a scheduled holiday or weekend, will be
held until the next determination of price.
 
                                      A-15
<PAGE>
    As more fully set  forth in Section 8,  accrued interest from the  preceding
Record  Date to, but not including, the  settlement date of the transaction will
be added to the Public Offering Price to determine the purchase price of  Units.
The date of settlement is currently three business days after purchase.
 
    The  above graduated sales charges will apply on all applicable purchases of
Nuveen investment company securities on any one day by the same purchaser in the
amounts stated, and for this purpose purchases of this Series will be aggregated
with concurrent  purchases of  any other  Series or  of shares  of any  open-end
management  investment company of which the Sponsor is principal underwriter and
with respect to the purchase of which a sales charge is imposed.
 
    Purchases by or for the account of  an individual and his or her spouse  and
children  under 21 years of  age will be aggregated  to determine the applicable
sales charge. The graduated  sales charges are also  applicable to a trustee  or
other  fiduciary  purchasing  securities for  a  single trust  estate  or single
fiduciary account.
 
    Units may be purchased at the  Public Offering Price without a sales  charge
by officers or directors and by bona fide, full-time employees of Nuveen, Nuveen
Advisory Corp., Nuveen Institutional Advisory Corp. and The John Nuveen Company,
including  in each case these individuals and their immediate family members (as
defined above).
 
    Units may be  purchased in  the primary or  secondary market  at the  Public
Offering  Price for  non-breakpoint purchases  minus the  concession the Sponsor
typically allows  to  brokers  and dealers  for  non-breakpoint  purchases  (see
Section  17) 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
defined 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.
 
    The  initial or primary Public Offering Price  of the Units in each Trust is
based upon a pro rata share of the OFFERING prices per Unit of the Bonds in such
Trust plus the  applicable sales  charge. The secondary  market Public  Offering
Price of each Trust is based upon a pro rata share of the BID prices per Unit of
the Bonds in such Trust plus the applicable sales charge. The OFFERING prices of
Bonds in a Trust may be expected to average approximately 1% to 2% more than the
BID  prices of such Bonds  in the case of  National, Long Intermediate and State
Trusts, 3/4%  to 1  1/2% in  the  case of  Intermediate and  Short  Intermediate
Trusts,  and  1/2% to  3/4% in  the case  of Short  Term Trusts.  The difference
between the bid side evaluation and the offering side evaluation of the Bonds in
each Trust on  the business day  prior to the  Date of Deposit  is shown in  the
discussion of each Trust portfolio.
 
    Whether  or not Units are being offered for sale, the Sponsor will determine
the aggregate value of each Trust as of 4:00 p.m. eastern time: (i) on each June
30 or December 31 (or, if such date is not a business day, the last business day
prior thereto), (ii) on any day on  which a Unit is tendered for redemption  (or
the  next succeeding business day  if the date of  tender is a non-business day)
and   (iii)    at   such    other    times   as    may   be    necessary.    For
 
                                      A-16
<PAGE>
this  purpose,  a "business  day"  shall be  any day  on  which the  Exchange is
normally open. (See Section 16.)
 
7.  MARKET FOR UNITS
 
During the  initial public  offering period,  the Sponsor  intends to  offer  to
purchase  Units of each  Trust at a price  equivalent to the  pro rata share per
Unit of the OFFERING prices of the Bonds in such Trust (plus accrued  interest).
Afterward,  although  it is  not  obligated to  do  so, the  Sponsor  intends to
maintain a secondary  market for  Units of  each Trust  at its  own expense  and
continuously  to offer  to purchase  Units of each  Trust at  prices, subject to
change at  any time,  which  are based  upon  the BID  prices  of Bonds  in  the
respective portfolios of the Trusts. If the supply of Units of any of the Trusts
of  this Series exceeds demand,  or for some other  business reason, the Sponsor
may discontinue purchases of Units of such Trust at such prices. UNITHOLDERS WHO
WISH TO DISPOSE OF THEIR UNITS SHOULD INQUIRE OF THE TRUSTEE OR THEIR BROKER  AS
TO  THE  CURRENT  REDEMPTION PRICE  (SEE  SECTION  19). In  connection  with its
secondary marketmaking activities, the Sponsor may from time to time enter  into
secondary  market  joint  account  agreements with  other  brokers  and dealers.
Pursuant to such an agreement the Sponsor will purchase Units from the broker or
dealer at the bid price and will place the Units into a joint account managed by
the Sponsor; sales from  the account will  be made in  accordance with the  then
current  prospectus and the Sponsor and the  broker or dealer will share profits
and losses in  the joint account  in accordance  with the terms  of their  joint
account agreement.
 
    Certificates,  if any, for Units are  delivered to the purchaser as promptly
after the  date of  settlement as  the  Trustee can  complete the  mechanics  of
registration.  The date  of settlement  is currently  three business  days after
purchase. Normally, Certificates, if  any, are mailed by  the Trustee within  48
hours  after registration instructions are received. Purchasers of Units to whom
Certificates are issued will be unable to exercise any right of redemption until
they have received  their Certificates  as tender of  the Certificate,  properly
endorsed for transfer. (See Section 19.)
 
    Each  Unit of  each respective  Trust initially  offered by  this Prospectus
represents that fractional  undivided interest  in such  Trust as  is set  forth
under "Essential Information Regarding the Trusts." To the extent that any Units
of  any Trust are  redeemed by the  Trustee, the aggregate  value of the Trust's
assets will decrease  by the amount  paid to the  redeeming Unitholder, but  the
fractional  undivided  interest  of  each unredeemed  Unit  in  such  Trust will
increase proportionately.  The Sponsor  will initially,  and from  time to  time
thereafter, hold Units in connection with their offering.
 
8.  WHAT IS ACCRUED INTEREST?
 
Accrued  interest is the accumulation of unpaid interest on a bond from the last
day on which  interest thereon  was paid.  Interest on  Bonds in  each Trust  is
accounted  for daily on an accrual basis. For this reason, the purchase price of
Units of a Trust will  include not only the Public  Offering Price but also  the
proportionate  share of  accrued interest  to the  date of  settlement. Interest
accrues to the  benefit of Unitholders  commencing with the  settlement date  of
their purchase transaction.
 
    Accrued interest does not include accrual of original issue discount on zero
coupon  bonds, Stripped Obligations or other original issue discount bonds. (See
"Summary of Portfolios--General Trust Information"  and "What Is The Tax  Status
of Unitholders.")
 
    In  an effort to reduce the amount  of accrued interest that investors would
have to pay in addition to the Public Offering Price, the Trustee has agreed  to
advance  to each Trust the amount of accrued interest due on the Bonds as of the
Date of Deposit (which has been designated  the first Record Date for all  plans
of distribution). This accrued interest will be
 
                                      A-17
<PAGE>
paid to the Sponsor as the holder of record of all Units on the Date of Deposit.
Consequently,  when the Sponsor  sells Units of  a Trust, the  amount of accrued
interest to be  added to  the Public Offering  Price to  determine the  purchase
price  of the  Units of such  Trust purchased  by an investor  will include only
accrued interest from the  Date of Deposit  to, but not  including, the date  of
settlement  of the investor's purchase, less  any distributions from the related
Interest Account. The date of settlement is currently three business days  after
purchase.  The Trustee will recover its  advancements (without interest or other
cost to the Trusts) from interest received on the Bonds deposited in each Trust.
 
    The Trustee has no  cash for distribution to  Unitholders until it  receives
interest  payments on the Bonds in the  Trusts. Since municipal bond interest is
accrued daily but  paid only  semi-annually, during  the initial  months of  the
Trusts,  the Interest Accounts,  consisting of accrued  but uncollected interest
and collected interest  (cash), will  be predominantly  the uncollected  accrued
interest that is not available for distribution. However, due to advances by the
Trustee,  the Trustee will provide a first distribution between approximately 30
and 60 days after the Date of Deposit. Assuming each Trust retains its  original
size  and composition  and expenses  and fees  remain the  same, annual interest
collected and distributed  will approximate  the estimated  Net Annual  Interest
Income  stated herein. However, the  amount of accrued interest  at any point in
time will  be  greater than  the  amount that  the  Trustee will  have  actually
received and distributed to the Unitholders. Therefore, there will always remain
an  item of  accrued interest  that is  included in  the Purchase  Price and the
redemption price of the Units.
 
    Interest is accounted  for daily and  a proportionate share  of accrued  and
undistributed  interest computed from the preceding  Record Date is added to the
daily valuation of each Unit  of each Trust. (See Sections  3 and 13.) As  Bonds
mature,  or are redeemed or sold, the  accrued interest applicable to such bonds
is collected and subsequently distributed  to Unitholders. Unitholders who  sell
or redeem all or a portion of their Units will be paid their proportionate share
of  the remaining accrued interest to, but not including, the third business day
following the date of sale or tender.
 
9.  WHAT ARE ESTIMATED LONG TERM RETURN AND ESTIMATED CURRENT RETURN?
 
The Estimated Long Term Return for each Trust is a measure of the return to  the
investor  earned over the estimated  life of the Trust.  The Estimated Long Term
Return represents an average of the yields to maturity (or call) of the Bonds in
the Trust's portfolio calculated in  accordance with accepted bond practice  and
adjusted  to reflect expenses  and sales charges.  Under accepted bond practice,
tax-exempt bonds are customarily offered to investors on a "yield price"  basis,
which  involves computation  of yield  to maturity  or to  an earlier  call date
(whichever produces the lower yield), and which takes into account not only  the
interest  payable  on the  bonds but  also  the amortization  or accretion  to a
specified date of any premium over or discount from the par (maturity) value  in
the  bond's  purchase  price. In  calculating  Estimated Long  Term  Return, the
average yield for  the Trust's  portfolio is  derived by  weighting each  Bond's
yield by the market value of the Bond and by the amount of time remaining to the
date  to which the Bond is priced. Once the average portfolio yield is computed,
this figure is then reduced to reflect estimated expenses and the effect of  the
maximum  sales  charge  paid  by  investors.  The  Estimated  Long  Term  Return
calculation does not take into account the effect of a first distribution  which
may  be less than a regular  distribution or may be paid  at some point after 30
days (or a second distribution which may be less than a normal distribution  for
Unitholders  who choose quarterly or semi-annual  plans of distribution), and it
also does  not  take  into account  the  difference  in timing  of  payments  to
Unitholders  who choose quarterly or semi-annual  plans of distribution, each of
which will reduce the return.
 
                                      A-18
<PAGE>
    Estimated Current Return  is computed  by dividing the  Net Annual  Interest
Income per Unit by the Public Offering Price. In contrast to Estimated Long Term
Return, Estimated Current Return does not reflect the amortization of premium or
accretion of discount, if any, on the Bonds in the Trust's portfolio. Net Annual
Interest Income per Unit is calculated by dividing the annual interest income to
the Trust, less estimated expenses, by the number of Units outstanding.
 
    Net  Annual Interest  Income per Unit,  used to  calculate Estimated Current
Return, will vary  with changes  in fees  and expenses  of the  Trustee and  the
Evaluator  and with the redemption, maturity, exchange or sale of Bonds. A Trust
may experience expenses and  portfolio changes different  from those assumed  in
the  calculation of Estimated Long  Term Return. There thus  can be no assurance
that the Estimated Current Returns or Estimated Long Term Returns quoted  herein
will  be  realized  in  the  future.  A  Unitholder's  actual  return  may  vary
significantly from  the  Estimated  Long-Term Return,  based  on  their  holding
period,  market interest  rate changes,  other factors  affecting the  prices of
individual  bonds  in  the  portfolio,  and  differences  between  the  expected
remaining life of portfolio bonds and the actual length of time that they remain
in  the Trust; such actual holding periods  may be reduced by termination of the
Trust, as described in "AMENDMENT AND TERMINATION OF INDENTURE." Since both  the
Estimated  Current Return and  the Estimated Long Term  Return quoted herein are
based on the market value of the  underlying Bonds on the business day prior  to
the  Date of Deposit, subsequent calculations of these performance measures will
reflect the then current market value of the underlying Bonds and may be  higher
or lower.
 
    A  portion of the  monies received by a  Trust may be  treated, in the first
year only, as a return of principal due to the inclusion in the Trust  portfolio
of  "when-issued"  or  other  Bonds  having delivery  dates  after  the  date of
settlement for purchases  made on  the Date of  Deposit. A  consequence of  this
treatment  is that in the computation of  Estimated Current Return for the first
year, such monies are excluded from Net Annual Interest Income and treated as an
adjustment to the Public Offering  Price. (See "Essential Information  Regarding
the Trusts" and Sections 4 and 11.)
 
    For a statement of the Net Annual Interest Income per Unit under the monthly
plan  of  distribution,  and Estimated  Long  Term Yield  and  Estimated Current
Returns based on the Public Offering Prices of the Trusts in this Series, all as
of the day prior  to the Date of  Deposit, see "Essential Information  Regarding
the Trusts."
 
10.  HOW WAS THE PRICE OF THE BONDS DETERMINED AT THE DATE OF DEPOSIT?
 
The prices at which the Bonds deposited in the Trusts would have been offered to
the  public on the business day prior to  the Date of Deposit were determined by
the Trustee on the basis  of an evaluation of such  Bonds prepared by Kenny  S&P
Evaluation  Services, a  division of  J. J.  Kenny Co.,  Inc., a  firm regularly
engaged in the business of  evaluating, quoting or appraising comparable  bonds.
With respect to Bonds in Insured Trusts and insured Bonds in Traditional Trusts,
Kenny  S&P Evaluation Services, a  division of J. J.  Kenny Co., Inc., evaluated
the Bonds as so insured. (See Section 5).
 
    The amount by which  the Trustee's determination of  the OFFERING PRICES  of
the  Bonds deposited  in the Trusts  was greater or  less than the  cost of such
Bonds to  the  Sponsor was  PROFIT  OR LOSS  to  the Sponsor  exclusive  of  any
underwriting  profit.  (See Section  3.) The  Sponsor  also may  realize FURTHER
PROFIT OR  SUSTAIN  FURTHER LOSS  as  a result  of  fluctuations in  the  Public
Offering  Price of the Units. Cash, if  any, made available to the Sponsor prior
to the settlement date for a purchase  of Units, or prior to the acquisition  of
all  Portfolio securities by a Trust, may  be available for use in the Sponsor's
business, and may be of benefit to the Sponsor.
 
                                      A-19
<PAGE>
11.  WHAT IS THE TAX STATUS OF UNITHOLDERS?
 
At the  respective times  of issuance  of  the Bonds  opinions relating  to  the
validity  thereof and to  the exemption of interest  thereon from Federal income
tax 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.  For a  discussion of  the tax  status of  State Trusts see
"Summary of  Portfolios--  Tax Status"  for  the respective  State  Trust.  (See
Sections  2 and 3.)  Neither the Sponsor  nor its counsel  have made any special
review for the Trusts of the proceedings  relating to the issuance of the  Bonds
or of the basis for the opinions rendered in connection therewith.
 
    Taxpayers  must  disclose  on  their  Federal  tax  returns  the  amount  of
tax-exempt  interest  earned  during  the  year.  Federally  tax-exempt  income,
including  income on Units  of the Trusts,  will be taken  into consideration in
computing the portion, if any, of social security benefits received that will be
included in a taxpayer's gross income subject to the Federal income tax.
 
    Gain realized on the sale or redemption of the Bonds by the Trustee or of  a
Unit  by  a Unitholder  is includable  in  gross income  for Federal  income tax
purposes, and may be  includable 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.)  A portion of a Unitholder's gain,  to
the extent of accreted market discount, may be treated as ordinary income rather
than capital gain if the Bonds were purchased by a Trust at a market discount or
if  the Unitholder purchased his  or her Units at a  market discount on or after
April 30, 1993. Market discount can arise based on the price the Trust pays  for
the Bonds or the price a Unitholder pays for his or her Units.
 
    In the opinion of Chapman and Cutler, Counsel to the Sponsor, under existing
law:
 
    (1) the  Trusts  are not  associations taxable  as corporations  for Federal
        income tax purposes. Tax-exempt interest received by each of the  Trusts
        on  Bonds  deposited  therein  will  retain  its  status  as  tax-exempt
        interest, for Federal income tax  purposes, when received by the  Trusts
        and  when distributed  to the  Unitholders, except  that the alternative
        minimum tax and  environmental tax (the  "Superfund Tax") applicable  to
        corporate  Unitholders  may, in  certain  circumstances, include  in the
        amount on which  such taxes  are calculated  a portion  of the  interest
        income  received by  the Trust. See  "Certain Tax  Matters Applicable to
        Corporate Unitholders", below;
 
    (2) each Unitholder of a Trust is considered  to be the owner of a pro  rata
        portion  of such Trust under Subpart E, subchapter J of Chapter 1 of the
        Internal Revenue Code of 1986 (the "Code") and will have a taxable event
        when the Trust  disposes of  a Bond or  when the  Unitholder redeems  or
        sells  Units. Unitholders must  reduce the tax basis  of their Units for
        their share of accrued interest received by the Trust, if any, on  Bonds
        delivered  after  the  date the  Unitholders  pay for  their  Units 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  at
        maturity,  redemption or otherwise),  gain or loss  is recognized to the
        Unitholder. The amount of any such gain or loss is measured by comparing
        the Unitholder's  pro  rata  share  of  the  total  proceeds  from  such
        disposition  with  the  Unitholder's  basis for  his  or  her fractional
        interest in  the asset  disposed of.  In the  case of  a Unitholder  who
        purchases    Units,   such   basis   (before   adjustment   for   earned
 
                                      A-20
<PAGE>
        original  issue  discount  and  amortized  bond  premium,  if  any)   is
        determined by apportioning the cost of the Units among each of the Trust
        assets  ratably according to value as of  the date of acquisition of the
        Units. The  tax cost  reduction requirements  of said  Code relating  to
        amortization  of bond premium  may, under some  circumstances, result in
        the Unitholder realizing a taxable gain  when his or her Units are  sold
        or redeemed for an amount equal to their original cost; and
 
    (3) any  amounts paid on defaulted Bonds  held by the Trustee under policies
        of insurance issued with respect to  such Bonds will be excludable  from
        Federal  gross income if, and to the same extent as, such interest would
        have been so excludable if paid by the respective issuer 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. Paragraph  (2)  of  this  opinion  is
        accordingly   applicable  to   policy  proceeds   representing  maturing
        interest.
 
In the opinion of Carter, Ledyard & Milburn, counsel to the Trustee, and, in the
absence of a New York Trust from the Series, special counsel for the Series  for
New York tax matters, under existing law:
 
        Under  the income tax laws of the State and City of New York, each Trust
    is not an association taxable as a corporation and the income of each  Trust
    will be treated as the income of the Unitholders.
 
    For  a summary of  each opinion of  special counsel to  the respective State
Trusts for state tax matters, see Section 3.
 
    ALL STATEMENTS IN THE PROSPECTUS CONCERNING EXEMPTION FROM FEDERAL, STATE OR
OTHER TAXES ARE THE OPINION OF COUNSEL AND ARE TO BE SO CONSTRUED.
 
    The redemption of Units in a Trust  by a Unitholder would result in each  of
the  remaining Unitholders of said Trust owning a greater proportionate interest
in the remaining assets  of said Trust. Although  present law does not  directly
address  this matter, it  would appear reasonable  that a remaining Unitholder's
tax basis in  his Units would  include his proportionate  share of any  proceeds
received by the Trust on the sale of bonds which were not distributed to him but
were  instead used by  the Trust to redeem  Units and that his  tax basis in the
remaining assets of the  Trust would accordingly be  increased by such share  of
proceeds, based on the relative fair market value of the remaining assets of the
Trust as of the date of such redemption.
 
    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"). 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. The  accrual of  tax-exempt original  issue discount  on zero  coupon
bonds  and other original issue discount bonds will result in an increase in the
Unitholder's basis in  such obligations and,  accordingly, in his  basis in  his
Units.
 
    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). Under the
Tax   Act,   accretion   of   market    discount   is   taxable   as    ORDINARY
 
                                      A-21
<PAGE>
INCOME;  under prior law, the accretion had been treated as capital gain. Market
discount that  accretes while  the 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 advisors  regarding these  rules and
their application.
 
    The Internal Revenue Code provides that interest on indebtedness incurred or
continued to purchase  or carry  obligations, the  interest on  which is  wholly
exempt  from Federal income taxes, is not deductible. Because each Unitholder is
treated for Federal income tax purposes as the owner of a pro rata share of  the
Bonds owned by the applicable Trust, interest on borrowed funds used to purchase
or  carry Units  of such  Trust will  not be  deductible for  Federal income tax
purposes. Under rules used by the Internal Revenue Service for determining  when
borrowed  funds are  considered used for  the purpose of  purchasing or carrying
particular assets, the  purchase of Units  may be considered  to have been  made
with borrowed funds even though the borrowed funds are not directly traceable to
the  purchase of Units (however, these rules  generally do not apply to interest
paid on  indebtedness incurred  to purchase  or improve  a personal  residence).
Similar  rules are  generally applicable for  state tax  purposes. Special rules
apply in  the  case  of  certain  financial  institutions  that  acquire  Units.
Investors  with questions regarding  these issues should  consult with their tax
advisers.
 
    In general,  each  issue  of bonds  in  the  Trusts is  subject  to  certain
post-issuance  requirements which must be  met in order for  the interest on the
Bonds to be and remain exempt from Federal income taxation. Bond counsel to each
issuer generally has opined that, assuming continuing compliance by such issuers
with certain covenants, interest on such  Bonds will continue to be exempt  from
Federal income taxation (other than with respect to the application to corporate
Unitholders  of the alternative  minimum tax or the  Superfund Tax, as discussed
below).
 
    For purposes of computing  the alternative minimum  tax for individuals  and
corporations, interest on certain specified tax-exempt private activity bonds is
included as a preference item. The Trusts do not include any such bonds.
 
    For  taxpayers  other than  corporations,  net capital  gains  are presently
subject to a maximum tax  rate of 28 percent. 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.
 
    CERTAIN  TAX MATTERS  APPLICABLE TO  CORPORATE UNITHOLDERS.  In the  case of
certain corporations, the alternative minimum  tax and the Superfund Tax  depend
upon the corporation's alternative minimum taxable income ("AMTI"), which is the
corporation's  taxable income  with certain  adjustments. One  of the adjustment
items used in computing AMTI and the Superfund Tax of a corporation (other  than
an S corporation, Regulated Investment Company, Real Estate Investment Trust, or
REMIC)  is an amount equal to 75%  of the excess of such corporation's "adjusted
current earnings" over an amount equal to its AMTI (before such adjustment  item
and  the  alternative tax  net  operation loss  deduction).  Although tax-exempt
interest received by each of the Trusts  on Bonds deposited therein will not  be
included  in the gross  income of corporations for  Federal income tax purposes,
"adjusted current earnings" includes all tax-exempt interest, including interest
on all Bonds in the Trust and tax-exempt original issue discount.
 
    Corporate Unitholders  are urged  to  consult their  own tax  advisers  with
respect  to the particular tax consequences  to them resulting under the Federal
tax law, including the
 
                                      A-22
<PAGE>
corporate alternative minimum tax, the Superfund Tax and the branch profits  tax
imposed by Section 884 of the Code.
 
    EXCEPT  AS NOTED ABOVE AND IN SECTION  3, THE EXEMPTION OF INTEREST ON STATE
AND LOCAL  OBLIGATIONS FOR  FEDERAL  INCOME TAX  PURPOSES 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.
 
12.  WHAT ARE NORMAL TRUST OPERATING EXPENSES?
 
No annual advisory fee is charged the  Trusts by the Sponsor. The Sponsor  does,
however,  receive a fee  of $0.17 per  annum per $1,000  principal amount of the
underlying Bonds  in each  Trust  for regularly  evaluating  the Bonds  and  for
maintaining surveillance over the portfolio. (See Section 16.)
 
    The  Trustee receives for ordinary recurring services an annual fee for each
plan of  distribution for  each Trust  as set  forth in  "Essential  Information
Regarding  the Trusts." Each  annual fee is  per $1,000 principal  amount of the
underlying Bonds in  a Trust for  that portion  of the Trust  that represents  a
particular  plan of distribution. The Trustee's fee may be periodically adjusted
in response to fluctuations in short-term interest rates (reflecting the cost to
the Trustee of advancing funds to  a Trust to meet scheduled distributions)  and
may be further adjusted in accordance with the cumulative percentage increase of
the  United  States Department  of Labor's  Consumer  Price Index  entitled "All
Services Less Rent" since the establishment  of the Trusts. The Trustee has  the
use  of funds, if any, being held in the Interest and Principal Accounts of each
Trust for  future  distributions, payment  of  expenses and  redemptions.  These
Accounts  are non-interest  bearing to  Unitholders. Pursuant  to normal banking
procedures, the Trustee benefits from the use of funds held therein. Part of the
Trustee's compensation for its services to  the Fund is expected to result  from
such use of these funds.
 
    Premiums  for the policies  of insurance obtained  by the Sponsor  or by the
Bond issuers with respect to the Bonds in the Insured Trusts and with respect to
insured Bonds in Traditional Trusts have been paid in full prior to the  deposit
of the Bonds in the Trusts, and the value of such insurance has been included in
the evaluation of the Bonds in each Trust and accordingly in the Public Offering
Price  of Units of each Trust. There  are no annual continuing premiums for such
insurance.
 
   
    All or  a portion  of  the expenses  incurred  in establishing  the  Trusts,
including costs of preparing the registration statement, the trust indenture and
other  closing  documents, registering  Units with  the Securities  and Exchange
Commission and states, the initial audit of each Trust portfolio, legal fees and
the initial  fees  and  expenses  of the  Trustee  and  any  other  non-material
out-of-pocket  expenses, will be paid by the Trusts and amortized over the first
five years of such Trusts.  The following are expenses  of the Trusts and,  when
paid  by or are owed to the Trustee, are  secured by a lien on the assets of the
Trust or Trusts to which such expenses are allocable: (1) the expenses and costs
of any action undertaken by the Trustee to protect the Trusts and the rights and
interests of the Unitholders; (2) all taxes and other governmental charges  upon
the  Bonds or any part of the Trusts  (no such taxes or charges are being levied
or made or, to the knowledge of the Sponsor, contemplated); (3) amounts  payable
to  the Trustee  as fees for  ordinary recurring services  and for extraordinary
non-recurring services rendered pursuant to the Indenture, all disbursements and
expenses including  counsel  fees (including  fees  of bond  counsel  which  the
Trustee  may  retain)  sustained  or  incurred  by  the  Trustee  in  connection
therewith; and (4)  any losses or  liabilities accruing to  the Trustee  without
negligence,  bad  faith  or  willful  misconduct on  its  part.  The  Trustee is
empowered to sell Bonds in order to pay these amounts if funds are not otherwise
available in the applicable Interest and Principal Accounts.
    
 
                                      A-23
<PAGE>
    The Indenture requires each Trust  to be audited on  an annual basis at  the
expense  of the Trust by independent public accountants selected by the Sponsor.
The Trustee  shall not  be  required, however,  to cause  such  an audit  to  be
performed  if its cost to a Trust shall exceed $.05 per Unit on an annual basis.
Unitholders of a  Trust covered by  an audit may  obtain a copy  of the  audited
financial statements upon request.
 
13.  WHEN ARE DISTRIBUTIONS MADE TO UNITHOLDERS?
 
Interest received by the Trustee on the Bonds in each Trust, including that part
of  the proceeds of  any disposition of Bonds  which represents accrued interest
and including  any insurance  proceeds representing  interest due  on  defaulted
Bonds,  shall be credited to the "Interest  Account" of such Trust and all other
moneys received by the Trustee shall  be credited to the "Principal Account"  of
such Trust.
 
    The  pro rata share of  cash in the Principal Account  in each Trust will be
computed as of each semi-annual Record Date and distributions to the Unitholders
as of such Record Date will be made on or shortly after the fifteenth day of the
month. Proceeds received from the disposition, including sale, call or maturity,
of any of the Bonds and all amounts  paid with respect to zero coupon bonds  and
Stripped  Obligations will be held  in the Principal Account  and either used to
pay for Units  redeemed or distributed  on the Distribution  Date following  the
next semi-annual Record Date. The Trustee is not required to make a distribution
from  the  Principal  Account  of  any Trust  unless  the  amount  available for
distribution in such account equals at least ten cents per Unit.
 
    The pro rata share of the Interest Account in each Trust will be computed by
the Trustee each month as of each Record Date and distributions will be made  on
or  shortly after the fifteenth day of the month to Unitholders of such Trust as
of the Record Date who are entitled to distributions at that time under the plan
of distribution chosen. Persons who purchase  Units between a Record Date and  a
Distribution Date will receive their first distribution on the Distribution Date
following the next Record Date under the applicable plan of distribution.
 
    Purchasers  of  Units  who desire  to  receive interest  distributions  on a
monthly or quarterly basis may elect to do so at the time of purchase during the
initial public offering  period. Those indicating  no choice will  be deemed  to
have  chosen the  semi-annual distribution  plan. All  Unitholders, however, who
purchase Units during the  initial public offering period  and who hold them  of
record on the first Record Date will receive the first distribution of interest.
Thereafter, Record Dates for monthly distributions will be the first day of each
month;  Record  Dates  for quarterly  distributions  will  be the  first  day of
February,  May,  August   and  November;  and   Record  Dates  for   semi-annual
distributions will be the first day of May and November.
 
    Details  of distributions  per Unit  of each  Trust under  the various plans
based upon estimated Net Annual Interest Income at the Date of Deposit are shown
in the tables appearing  in Section 3. The  amount of the regular  distributions
will  remain the same so long as each  Trust portfolio remains the same and fees
and expenses remain the same, and will generally change when Bonds are redeemed,
mature or are sold or when fees and expenses increase or decrease.
 
    The plan of  distribution selected  by a  Unitholder will  remain in  effect
until  changed.  Unitholders  purchasing  Units  in  the  secondary  market will
initially receive distributions  in accordance  with the election  of the  prior
owner.  Unitholders desiring to change  their plan of distribution  may do so by
sending  a   written   notice  requesting   the   change,  together   with   any
Certificate(s),  to  the  Trustee. The  notice  and any  Certificate(s)  must be
received by  the  Trustee not  later  than the  semi-annual  Record Date  to  be
effective   as  of   the  semi-annual  distribution   following  the  subsequent
semi-annual Record Date. Unitholders are requested
 
                                      A-24
<PAGE>
to make any such  changes within 45  days prior to  the applicable Record  Date.
Certificates should only be sent by registered or certified mail to minimize the
possibility  of their being  lost or stolen.  (See Section 18.)  If no notice is
received in proper form by  the Trustee, the Unitholder  will be deemed to  have
elected to continue the same plan.
 
    As  of the first day of each month the Trustee will deduct from the Interest
Account of a Trust or, to the extent funds are not sufficient therein, from  the
Principal  Account of a  Trust, amounts needed  for payment of  expenses of such
Trust. The Trustee also may withdraw from said accounts such amount, if any,  as
it  deems necessary to establish a  reserve for any governmental charges payable
out of such Trust. Amounts  so withdrawn shall not be  considered a part of  the
Trust's  assets until such time  as the Trustee shall return  all or any part of
such amounts to the appropriate account.
 
    For the purpose  of minimizing  fluctuations in the  distributions from  the
Interest  Account of a Trust, the Trustee  is authorized to advance such amounts
as may be necessary to provide for interest distributions of approximately equal
amounts. The  Trustee  shall  be  reimbursed, without  interest,  for  any  such
advances  from funds in  the Interest Account  of such Trust.  The Trustee's fee
takes into account  the costs attributable  to the outlay  of capital needed  to
make such advances.
 
    The  Trustee  shall withdraw  from the  Interest  Account and  the Principal
Account of a  Trust such amounts  as may  be necessary to  cover redemptions  of
Units of such Trust by the Trustee. (See Section 19.)
 
    Funds  which are available for future distributions, redemptions and payment
of expenses are held in accounts  which are non-interest bearing to  Unitholders
and are available for use by the Trustee pursuant to normal banking procedures.
 
14.  ACCUMULATION PLAN
 
The  Sponsor, John Nuveen & Co.  Incorporated, is also the principal underwriter
of the  Nuveen Municipal  Bond Fund,  Inc. (the  "Bond Fund"),  Nuveen  Tax-Free
Reserves, Inc. ("Tax-Free Reserves"), Nuveen California Tax-Free Fund, Inc. (the
"California  Fund"),  Nuveen Tax-Free  Bond Fund,  Inc. ("Tax-Free  Bond Fund"),
Nuveen Insured Tax-Free  Bond Fund, Inc.  (the "Insured Bond  Fund") and  Nuveen
Tax-Free  Money  Market Fund,  Inc.  (the "Money  Market  Fund") and  the Nuveen
Multistate  Tax-Free  Trust  (the  "Multistate  Trust").  Each  of  these  funds
(together,  the  "Accumulation Funds")  is  an open-end,  diversified management
investment  company  into  which  Unitholders  may  choose  to  reinvest   Trust
distributions  automatically,  without any  sales  charge. (Reinvestment  in the
California Fund is available only  to Unitholders who are California  residents.
Reinvestment in the State Portfolios of the Tax-Free Bond Fund, the Insured Bond
Fund,  the  Money Market  Fund and  the  Multistate Trust  is available  only to
Unitholders who  are residents  of  the states  for  which such  portfolios  are
named.)  Unitholders may reinvest  both interest and  principal distributions or
principal distributions only. Each  Accumulation Fund has investment  objectives
which  differ in  certain respects from  those of  the Trusts and  may invest in
securities which would not be eligible for deposit in the Trusts. The investment
adviser to  each Accumulation  Fund  is Nuveen  Advisory Corp.,  a  wholly-owned
subsidiary  of  the  Sponsor. The  following  is  a general  description  of the
investment objectives  and  policies  of  each Accumulation  Fund.  For  a  more
detailed description, Unitholders should read the prospectus of the Accumulation
Fund in which they are interested.
 
THE BOND FUND
 
    The  Bond  Fund has  the  objective of  providing,  through investment  in a
professionally managed portfolio of long-term  municipal bonds, as high a  level
of  current interest income exempt from Federal income tax as is consistent with
preservation of capital. The Bond Fund  may include in its portfolio  tax-exempt
bonds rated Baa or BBB or better by Moody's or
 
                                      A-25
<PAGE>
Standard  &  Poor's,  unrated bonds  which,  in  the opinion  of  the investment
adviser, have credit  characteristics equivalent to  bonds rated Baa  or BBB  or
better,  and certain  temporary investments,  including securities  the interest
income from which may be subject to Federal income tax.
 
TAX-FREE RESERVES
 
    Tax-Free Reserves is a  "money market" fund that  includes in its  portfolio
only  obligations  maturing  within  one  year  from  the  date  of acquisition,
maintains an average maturity of all investments of 120 days or less, values its
portfolio at amortized cost and seeks to maintain a net asset value of $1.00 per
share. It provides checkwriting and expedited wire redemption privileges for its
shareholders.  Tax-Free  Reserves  has  the  objective  of  providing,   through
investment  in  a professionally  managed portfolio  of high  quality short-term
municipal obligations, as high  a level of current  interest income exempt  from
Federal  income  tax  as is  consistent  with  preservation of  capital  and the
maintenance of  liquidity.  Tax-Free  Reserves  may  include  in  its  portfolio
municipal obligations rated Aaa, Aa, MIG-1, VMIG-1 or Prime-1 by Moody's or AAA,
AA, SP-1 or A-1 by Standard & Poor's, unrated municipal obligations that, in the
opinion  of the  investment adviser,  have credit  characteristics equivalent to
obligations  rated  as  above,  tax-exempt   obligations  backed  by  the   U.S.
Government, and temporary investments that may be subject to Federal income tax.
 
THE CALIFORNIA FUND
 
    The  California Fund has  the objective of  providing, through investment in
professionally managed portfolios of California municipal obligations, as high a
level of current interest income exempt from both Federal and California  income
taxes as is consistent with the investment policies of each of the portfolios of
the  California Fund  and with  preservation of  capital. Each  portfolio of the
California Fund may include  temporary investments that may  be subject to  tax.
California Unitholders may reinvest in one of three portfolios of the California
Fund:  The Nuveen California Tax-Free Value  Fund, the Nuveen California Insured
Tax-Free Value Fund and the Nuveen California Tax-Free Money Market Fund.
 
    The Nuveen California  Tax-Free Value  Fund invests  primarily in  long-term
investment  grade California  tax-exempt bonds  (I.E., bonds  rated in  the four
highest categories by  Moody's or Standard  & Poor's or,  if unrated, that  have
equivalent credit characteristics). The Nuveen California Insured Tax-Free Value
Fund  invests primarily  in the  same type  of investments  as the  Special Bond
Portfolio, each of which is covered by insurance guaranteeing the timely payment
of principal  and  interest  or  is  backed by  a  deposit  of  U.S.  Government
securities.
 
    The  Nuveen  California  Tax-Free  Money Market  Fund  invests  primarily in
high-quality short term  California tax-exempt money  market instruments  (I.E.,
obligations  rated in the two highest categories by Moody's or Standard & Poor's
or, if unrated,  that have  equivalent credit  characteristics). This  portfolio
will  include  only  obligations  maturing  within one  year  from  the  date of
acquisition, will maintain an average maturity of all investments of 120 days or
less, will value its portfolio at amortized cost and will seek to maintain a net
asset value of $1.00 per share. The Nuveen California Tax-Free Money Market Fund
provides for an expedited wire redemption privilege.
 
THE TAX-FREE BOND FUND
 
    The Tax-Free Bond Fund consists  of the Nuveen Massachusetts Tax-Free  Value
Fund,  the Nuveen New York  Tax-Free Value Fund, the  Nuveen Ohio Tax-Free Value
Fund, and the Nuveen  New Jersey Tax-Free Value  Fund, which are each  available
for  reinvestment to Unitholders who  are residents of the  state for which such
portfolio is  named. The  Tax-Free Bond  Fund has  the objective  of  providing,
through investment in a professionally managed
 
                                      A-26
<PAGE>
portfolio  of municipal bonds, as high a level of current interest income exempt
both from Federal income tax and from the income tax imposed by each portfolio's
designated state as  is consistent  with preservation of  capital. The  Tax-Free
Bond  Fund may include in  each of its portfolios  tax-exempt bonds rated Baa or
BBB or better; unrated  bonds which, in the  opinion of the investment  adviser,
have  credit characteristics equivalent to bonds rated Baa or BBB or better; and
certain temporary  investments, including  securities the  interest income  from
which may be subject to Federal and state income tax.
 
THE INSURED BOND FUND
 
    The  Insured Bond Fund  consists of the Nuveen  Insured Municipal Bond Fund,
the Nuveen Massachusetts  Insured Tax-Free Value  Fund and the  Nuveen New  York
Insured  Tax-Free  Value  Fund, which  are  each available  for  reinvestment to
Unitholders. (The Massachusetts and  New York Portfolios  are available only  to
those  Unitholders who  are residents  of the state  for which  the portfolio is
named.) The Insured Bond Fund has the objective of providing, through investment
in professionally managed  portfolios of  municipal bonds,  as high  a level  of
current  interest income exempt from both Federal income tax and, in the case of
designated state portfolios,  from the  income tax imposed  by each  portfolio's
designated  state, as  is consistent with  preservation of  capital. The Insured
Bond Fund may include in each of its portfolios the same type of investments  as
the  Tax-Free Bond Fund, each of which  is covered by insurance guaranteeing the
timely payment of  principal and  interest or  is backed  by a  deposit of  U.S.
Government securities.
 
THE MONEY MARKET FUND
 
    The  Money Market Fund  consists of the  Nuveen Massachusetts Tax-Free Money
Market Fund and the Nuveen New York  Tax-Free Money Market Fund, which are  each
available  for reinvestment  to Unitholders who  are residents of  the state for
which such portfolio is named. The Money Market Fund includes in its  portfolios
only  obligations  maturing  within  one  year  from  the  date  of acquisition,
maintains an average  maturity of  120 days or  less, values  its portfolios  at
amortized  cost and seeks to maintain a net  asset value of $1.00 per share. The
Money Market  Fund  has  the  objective  of  providing,  through  investment  in
professionally   managed  portfolios   of  high   quality  short-term  municipal
obligations, as high a level of current interest income exempt both from Federal
income tax and from the income tax imposed by each portfolio's designated  state
as  is consistent with stability of  principal and the maintenance of liquidity.
The  Money  Market  Fund  may  include  in  each  of  its  portfolios  municipal
obligations  rated Aaa, Aa, MIG-1, MIG-2, VMIG-1,  VMIG-2, Prime 1 or Prime 2 by
Moody's or  AAA, AA,  SP-1,  SP-2, A-1  or A-2  by  Standard &  Poor's;  unrated
municipal  obligations  that, in  the opinion  of  the investment  adviser, have
credit characteristics equivalent to obligations  rated as above; and  temporary
investments that may be subject to Federal and state income tax.
 
THE MULTISTATE TRUST
 
    The Multistate Trust consists of the Nuveen Arizona Tax-Free Value Fund, the
Nuveen Florida Tax-Free Value Fund, the Nuveen Maryland Tax-Free Value Fund, the
Nuveen  Michigan Tax-Free Value Fund, the Nuveen New Jersey Tax-Free Value Fund,
the Nuveen Pennsylvania  Tax-Free Value Fund  and the Nuveen  Virginia Tax  Free
Value  Fund, which  are each available  for reinvestment to  Unitholders who are
residents of the state for which  such portfolio is named. The Multistate  Trust
has  the objective of providing, through  investment in a professionally managed
portfolio of municipal bonds, as high a level of current interest income  exempt
from  both regular Federal  income tax and the  applicable state personal income
tax as is  consistent with  preservation of  capital. The  Multistate Trust  may
include  in each  of its  portfolios tax-exempt  bonds rated  "Baa" or  "BBB" or
better, unrated bonds  which, in  the opinion  of the  investment advisor,  have
credit characteristics equivalent to
 
                                      A-27
<PAGE>
bonds  rated  "baa" or  "BBB" or  better, limited  to  no more  than 20%  of the
Multistate Trust's assets, and certain temporary investments that may be subject
to Federal and state income tax.
 
    Each person who purchases Units of a  Trust may become a participant in  the
Accumulation  Plan and elect  to have his  or her distributions  on Units of the
Trust invested directly in shares of one of the Accumulation Funds.  Reinvesting
Unitholders   may  select  any  interest  distribution  plan.  Thereafter,  each
distribution  of  interest  income  or  principal  on  the  participant's  Units
(principal  only in  the case of  a Unitholder  who has chosen  to reinvest only
principal distributions) will, on the applicable distribution date, or the  next
day  on which the New  York Stock Exchange is  normally open ("business day") if
the distribution  date is  not  a business  day,  automatically be  received  by
Shareholder  Services, Inc., transfer agent for  each of the Accumulation Funds,
on behalf of such participant  and applied on that  date to purchase shares  (or
fractions  thereof)  of  the Accumulation  Fund  chosen  at net  asset  value as
computed as of 4:00 p.m. eastern time on each such date. All distributions  will
be  reinvested  in the  Accumulation Fund  chosen  and no  part thereof  will be
retained in a  separate account. These  purchases will be  made without a  sales
charge.
 
    Shareholder Services, Inc. will mail to each participant in the Accumulation
Plan  a quarterly  statement containing a  record of  all transactions involving
purchases of Accumulation Fund shares (or fractions thereof) with Trust interest
distributions or as a result of reinvestment of Accumulation Fund dividends. Any
distribution of principal used to purchase  shares of an Accumulation Fund  will
be  separately  confirmed by  Shareholder Services,  Inc. Unitholders  will also
receive  distribution  statements  from   the  Trustee  detailing  the   amounts
transferred to their Accumulation Fund accounts.
 
    Participants  may at any time, by so notifying the Trustee in writing, elect
to change  the  Accumulation  Fund  into which  their  distributions  are  being
reinvested,  to change from principal only  reinvestment to reinvestment of both
principal and interest or vice versa, or to terminate their participation in the
Accumulation Plan altogether and receive future distributions on their Units  in
cash.  There will be no  charge or other penalty for  such change of election or
termination.
 
    The character of  Trust distributions  for income tax  purposes will  remain
unchanged even if they are reinvested in an Accumulation Fund.
 
15.  HOW DETAILED ARE REPORTS TO UNITHOLDERS?
 
The  Trustee  shall  furnish Unitholders  of  a  Trust in  connection  with each
distribution, a statement of the amount of  interest and, if any, the amount  of
other  receipts (received  since the preceding  distribution) being distributed,
expressed in each case  as a dollar  amount representing the  pro rata share  of
each Unit of a Trust outstanding and a year to date summary of all distributions
paid  on said Units.  Within a reasonable period  of time after  the end of each
calendar year, the Trustee shall furnish to  each person who at any time  during
the  calendar  year was  a registered  Unitholder  of a  Trust a  statement with
respect to  such  Trust  (i)  as to  the  Interest  Account:  interest  received
(including  amounts  representing  interest  received  upon  any  disposition of
Bonds), and, except  for any  State Trust, the  percentage of  such interest  by
states  in which the issuers  of the Bonds are  located, deductions for fees and
expenses of such Trust, redemption of Units and the balance remaining after such
distributions and deductions,  expressed in  each case  both as  a total  dollar
amount  and as  a dollar  amount representing  the pro  rata share  of each Unit
outstanding on the  last business  day of  such calendar  year; (ii)  as to  the
Principal  Account: the dates of  disposition of any Bonds  and the net proceeds
received therefrom (excluding  any portion representing  accrued interest),  the
amount  paid for purchase of Replacement  Bonds, the amount paid upon redemption
of Units, deductions for  payment of applicable taxes  and fees and expenses  of
the  Trustee, and the balance remaining  after such distributions and deductions
expressed
 
                                      A-28
<PAGE>
both as a total dollar amount and  as a dollar amount representing the pro  rata
share  of each Unit outstanding on the  last business day of such calendar year;
(iii) a list of the Bonds held and  the number of Units outstanding on the  last
business  day of  such calendar year;  (iv) the  Unit Value based  upon the last
computation thereof made  during such  calendar year; and  (v) amounts  actually
distributed  during such  calendar year from  the Interest Account  and from the
Principal Account, separately stated, expressed both as total dollar amounts and
as dollar amounts representing the pro rata share of each Unit outstanding.
 
    Each annual statement will reflect  pertinent information in respect of  all
plans  of distribution so that Unitholders may be informed regarding the results
of other plans of distribution.
 
16.  UNIT VALUE AND EVALUATION
 
The value of each  Trust is determined by  the Sponsor on the  basis of (1)  the
cash  on hand in the Trust or moneys  in the process of being collected, (2) the
value of the Bonds  in the Trust based  on the BID prices  of the Bonds and  (3)
interest   accrued  thereon  not   subject  to  collection,   LESS  (1)  amounts
representing taxes or governmental charges payable out of the Trust and (2)  the
accrued  expenses of the Trust. The result of such computation is divided by the
number of Units of such  Trust outstanding as of  the date thereof to  determine
the  per Unit value ("Unit Value") of  such Trust. The Sponsor may determine the
value of the Bonds in each Trust (1)  on the basis of current BID prices of  the
Bonds  obtained from dealers or brokers who customarily deal in bonds comparable
to those held by the Trust, (2) if  bid prices are not available for any of  the
Bonds, on the basis of bid prices for comparable bonds, (3) by causing the value
of  the Bonds to be determined by  others engaged in the practice of evaluating,
quoting or appraising comparable bonds or  (4) by any combination of the  above.
Although  the Unit Value of each Trust is  based on the BID prices of the Bonds,
the Units are sold initially to the public at the Public Offering Price based on
the OFFERING prices of the Bonds.
 
    Because the insurance  obtained by the  Sponsor or by  the issuers of  Bonds
with  respect to  the Bonds in  the Insured  Trusts and with  respect to insured
Bonds in Traditional Trusts is effective so long as such Bonds are  outstanding,
such  insurance will be taken  into account in determining  the bid and offering
prices of such  Bonds and therefore  some value attributable  to such  insurance
will be included in the value of Units of Trusts that include such Bonds.
 
17.  HOW UNITS OF THE TRUSTS ARE DISTRIBUTED TO THE PUBLIC
 
John Nuveen & Co. Incorporated is the Sponsor and sole Underwriter of the Units.
It  is  the  intention  of  the  Sponsor  to  qualify  Units  of  National, Long
Intermediate, Intermediate, Short  Intermediate and Short  Term Trusts for  sale
under  the laws of  substantially all of  the states, and  Units of State Trusts
only in the state for which the Trust is named and selected other states.
 
    Promptly following the deposit of Bonds in exchange for Units of the Trusts,
it is the practice of the Sponsor to place all of the Units as collateral for  a
letter or letters of credit from one or more commercial banks under an agreement
to  release such Units from time to  time as needed for distribution. Under such
an arrangement  the Sponsor  pays  such banks  compensation  based on  the  then
current  interest  rate. This  is a  normal  warehousing arrangement  during the
period of distribution of the Units to public investors.
 
    The Sponsor plans to allow a  discount to brokers and dealers in  connection
with   the  primary  distribution   of  Units  and   also  in  secondary  market
transactions. The primary market discounts are as follows:
 
                                      A-29
<PAGE>
 
<TABLE>
<CAPTION>
                                                         DISCOUNT PER UNIT
                                --------------------------------------------------------------------
<S>                             <C>         <C>            <C>            <C>            <C>
                                 NATIONAL    LONG INTER-                  SHORT INTER-
                                AND STATE      MEDIATE     INTERMEDIATE      MEDIATE     SHORT TERM
NUMBER OF UNITS*                  TRUSTS       TRUSTS         TRUSTS         TRUSTS        TRUSTS
------------------------------  ----------  -------------  -------------  -------------  -----------
Less than 500.................    $3.20         $2.90          $2.70          $2.00         $1.50
500 but less than 1,000.......     3.20         2.90           2.70           2.00          1.50
1,000 but less than 2,500.....     3.20         2.70           2.50           1.80          1.30
2,500 but less than 5,000.....     3.20         2.45           2.25           1.55          1.05
5,000 but less than 10,000....     2.50         2.45           2.25           1.55          1.05
10,000 but less than 25,000...     2.00         2.00           2.00           1.30           .80
25,000 but less than 50,000...     1.75         1.75           1.75           1.30           .60
50,000 or more................     1.75         1.50           1.50           1.00           .60
</TABLE>
 
*Breakpoint sales charges and related dealer concessions are computed both on  a
 dollar  basis and  on the  basis of  the number  of Units  purchased, using the
 equivalent of 500 Units to  $50,000, 2,500 Units to  $250,000 etc. and will  be
 applied on that basis which is more favorable to the purchaser.
 
    The  Sponsor currently intends  to maintain a secondary  market for Units of
each Trust. See  Section 7.  The amount of  the dealer  concession on  secondary
market  purchases of Trust Units through the Sponsor will be computed based upon
the value  of the  Bonds in  the  Trust portfolio,  including the  sales  charge
computed as described in Section 6, and adjusted to reflect the cash position of
the  Trust principal  account, and will  vary with  the size of  the purchase as
shown in the following table:
 
<TABLE>
<CAPTION>
                                                               AMOUNT OF PURCHASE*
                            -----------------------------------------------------------------------------------------
<S>                         <C>        <C>        <C>        <C>        <C>        <C>         <C>         <C>
                                        $50,000   $100,000   $250,000   $500,000   $1,000,000  $2,500,000
                              UNDER       TO         TO         TO         TO          TO          TO      $5,000,000
YEARS TO MATURITY            $50,000    $99,999   $249,999   $499,999   $999,999   $2,499,999  $4,999,999   OR MORE
--------------------------  ---------  ---------  ---------  ---------  ---------  ----------  ----------  ----------
Less than 1...............      0          0          0          0          0          0           0           0
1 but less than 2.........    1.00%      .90%       .85%       .80%       .70%        .55%       .467%       .389%
2 but less than 3.........    1.30%      1.20%      1.10%      1.00%      .90%        .73%       .634%       .538%
3 but less than 4.........    1.60%      1.45%      1.35%      1.25%      1.10%       .90%       .781%       .662%
4 but less than 5.........    2.00%      1.85%      1.75%      1.55%      1.40%      1.25%       1.082%      .914%
5 but less than 7.........    2.30%      2.15%      1.95%      1.80%      1.65%      1.50%       1.320%      1.140%
7 but less than 10........    2.60%      2.45%      2.25%      2.10%      1.95%      1.70%       1.496%      1.292%
10 but less than 13.......    3.00%      2.80%      2.60%      2.45%      2.30%      2.00%       1.747%      1.494%
13 but less than 16.......    3.25%      3.15%      3.00%      2.75%      2.50%      2.15%       1.878%      1.606%
16 or more................    3.50%      3.50%      3.40%      3.35%      3.00%      2.50%       2.185%      1.873%
</TABLE>
 
 *Breakpoint sales charges and related dealer concessions are computed both on a
  dollar basis and  on the basis  of the  number of Units  purchased, using  the
  equivalent of 500 Units to $50,000, 2,500 Units to $250,000, etc., and will be
  applied on that basis which is more favorable to the purchaser.
 
    The  Sponsor reserves the  right to change  the foregoing dealer concessions
from time to time.
 
    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,  and  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, are  not entitled  to receive  any dealer  concession for  primary  or
secondary market purchases in which an investor purchases any number of Units at
the  Public Offering Price for non-breakpoint purchases minus the concession the
sponsor typically allows  to brokers  and dealers  for non-breakpoint  purchases
(see Section 6).
 
    Certain  commercial banks are making Units  of the Trusts available to their
customers on  an agency  basis. A  portion of  the sales  charge paid  by  these
customers  is retained by or  remitted to the banks in  the amounts shown in the
above table. The Glass-Steagall Act
 
                                      A-30
<PAGE>
prohibits banks from  underwriting Trust  Units; the Act  does, however,  permit
certain agency transactions and banking regulators have not indicated that these
particular  agency transactions are not permitted under the Act. In Texas and in
certain other states, any  bank making Units available  must be registered as  a
broker-dealer under state law.
 
    To  facilitate the handling of transactions, sales of Units shall be limited
to transactions involving a minimum of  either $5,000 or 50 Units, whichever  is
less.  The Sponsor reserves the right to reject,  in whole or in part, any order
for the purchase of Units.
 
18.  OWNERSHIP AND TRANSFER OF UNITS
 
The ownership of  Units is  evidenced by book  entry positions  recorded on  the
books  and records of the Trustee  unless the Unitholder expressly requests that
the purchased Units be evidenced in Certificate form. The Trustee is  authorized
to treat as the owner of Units that person who at the time is registered as such
on  the books of the Trustee. Any  Unitholder who holds a Certificate may change
to book entry ownership by submitting to the Trustee the Certificate along  with
a written request that the Units represented by such Certificate be held in book
entry form. Likewise, a Unitholder who holds Units in book entry form may obtain
a  Certificate for such  Units by written  request to the  Trustee. Units may be
held in denominations of one Unit or any multiple or fraction thereof. Fractions
of Units are computed to three  decimal places. Any Certificates issued will  be
numbered  serially for identification, and are  issued in fully registered form,
transferable only  on the  books of  the Trustee.  Book entry  Unitholders  will
receive a Book Entry Position Confirmation reflecting their ownership.
 
    Certificates  for  Units will  bear an  appropriate  notation on  their face
indicating which plan of distribution has been selected. When a change is  made,
the   existing  Certificates  must  be  surrendered   to  the  Trustee  and  new
Certificates issued to  reflect the  currently effective  plan of  distribution.
There will be no charge for this service. Holders of book entry Units can change
their  plan of distribution  by making a  written request to  the Trustee, which
will issue a new Book Entry Position Confirmation to reflect such change.
 
    Units are transferable by  making a written request  to the Trustee and,  in
the  case of Units  evidenced by Certificate(s),  by presenting and surrendering
such Certificate(s) to the  Trustee, at its corporate  trust office in New  York
City, properly endorsed or accompanied by a written instrument or instruments of
transfer. The Certificate(s) should be sent registered or certified mail for the
protection  of the Unitholder.  Each Unitholder must  sign such written request,
and such Certificate(s) or transfer instrument,  exactly as his name appears  on
(a)  the face of the Certificate(s) representing the Units to be transferred, or
(b) the  Book  Entry  Position  Confirmation(s) relating  to  the  Units  to  be
transferred.  Such signature(s) must be guaranteed  by a guarantor acceptable to
the Trustee. In certain instances  the Trustee may require additional  documents
such  as,  but  not  limited  to,  trust  instruments,  certificates  of  death,
appointments  as  executor  or   administrator  or  certificates  of   corporate
authority.  Mutilated Certificates must  be surrendered to  the Trustee in order
for a replacement Certificate to be issued.
 
    Although at the date hereof  no charge is made  and none is contemplated,  a
Unitholder  may be  required to  pay $2.00 to  the Trustee  for each Certificate
reissued or transfer of Units requested and to pay any governmental charge which
may be imposed in connection therewith.
 
REPLACEMENT OF LOST, STOLEN OR DESTROYED CERTIFICATES.
 
    To obtain a  new Certificate replacing  one that has  been lost, stolen,  or
destroyed,   the   Unitholder   must  furnish   the   Trustee   with  sufficient
indemnification and pay such expenses as the Trustee may incur.
 
                                      A-31
<PAGE>
    The indemnification protects the  Trustee, Sponsor, and  Trust from risk  if
the original Certificate is presented for transfer or redemption by a person who
purchased  it  in good  faith,  for value  and without  notice  of any  fraud or
irregularity.
 
    This indemnification  must  be  in the  form  of  an Open  Penalty  Bond  of
Indemnification.  The premium for such  an indemnity bond may  vary from time to
time, but currently amounts to 1% of  the market value of the Units  represented
by  the Certificate.  In the  case however,  of a  Trust as  to which  notice of
termination has been given, the premium currently amounts to 0.5% of the  market
value of the Units represented by such Certificate.
 
19.  HOW UNITS MAY BE REDEEMED WITHOUT CHARGE
 
Unitholders  may redeem all or a portion of  their Units by (1) making a written
request for such redemption (book entry Unitholders may use the redemption  form
on the reverse side of their Book Entry Position Confirmation) to the Trustee at
its  corporate trust office in New York City (redemptions of 1,000 Units or more
will require a signature  guarantee), (2) in  the case of  Units evidenced by  a
Certificate, by also tendering such Certificate to the Trustee, duly endorsed or
accompanied  by  proper instruments  of transfer  with signatures  guaranteed as
explained in  Section  18 above,  and  (3) payment  of  applicable  governmental
charges,  if any.  Certificates should be  sent only by  registered or certified
mail to minimize  the possibility of  their being  lost or stolen.  In order  to
effect  a  redemption of  Units evidenced  by a  Certificate, a  Unitholder must
tender the Certificate to the Trustee or provide satisfactory indemnity required
in connection with lost, stolen or  destroyed Certificates (See Section 18).  No
redemption  fee will be charged. A Unitholder may authorize the Trustee to honor
telephone instructions for  the redemption  of Units  held in  book entry  form.
Units represented by Certificates may not be redeemed by telephone. The proceeds
of Units redeemed by telephone will be sent by check either to the Unitholder at
the  address specified on his account or to a financial institution specified by
the Unitholder for credit to the account of the Unitholder. A Unitholder wishing
to  use  this  method  of  redemption  must  complete  a  Telephone   Redemption
Authorization  Form and  furnish the Form  to the  Trustee. Telephone Redemption
Authorization  Forms   can   be   obtained  from   a   Unitholder's   registered
representative  or by calling the  Trustee. Once the completed  Form is on file,
the Trustee  will honor  telephone redemption  requests by  any person.  If  the
telephone  redemption request is  received prior to 4:00  p.m. eastern time, the
Unitholder will be  entitled to receive  for each Unit  tendered the  Redemption
Price  as determined above.  A telephone redemption  request received after 4:00
p.m. eastern time will be treated as having been received the following business
day. The redemption proceeds will be mailed within seven calendar days following
the telephone redemption  request. Telephone  redemptions are  limited to  1,000
Units  or less. Only  Units held in the  name of individuals  may be redeemed by
telephone; accounts registered in  broker name, or  accounts of corporations  or
fiduciaries   (including  among  others,   trustees,  guardians,  executors  and
administrators) may not use the telephone redemption privilege.
 
    On the third business day following the date of tender, the Unitholder  will
be  entitled to receive  in cash for each  Unit tendered an  amount equal to the
Unit Value of such Trust determined by the Trustee, as of 4:00 p.m. eastern time
on the date of tender  as defined hereafter, plus  accrued interest to, but  not
including, the third business day after the date of tender ("Redemption Price").
The  price received upon redemption may be more  or less than the amount paid by
the Unitholder depending on the value of  the Bonds on the date of tender.  Such
value will vary with market and credit conditions, including changes in interest
rate  levels.  Unitholders should  check  with the  Trustee  or their  broker to
determine the Redemption Price before tendering Units.
 
                                      A-32
<PAGE>
    While the Trustee has the power to determine Redemption Price when Units are
tendered, the authority has  by practice been delegated  by the Trustee to  John
Nuveen  & Co.  Incorporated, which  determines the  Redemption Price  on a daily
basis.
 
    The "date of  tender" is  deemed to  be the date  on which  the request  for
redemption  of Units is received  in proper form by  the Trustee, except that as
regards a redemption request received after 4:00 p.m. eastern time or on any day
on which the New  York Stock Exchange (the  "Exchange") is normally closed,  the
date  of tender  is the  next day on  which such  Exchange is  normally open for
trading and such request will  be deemed to have been  made on such day and  the
redemption will be effected at the Redemption Price computed on that day.
 
    Accrued  interest paid  on redemption shall  be withdrawn  from the Interest
Account of the  appropriate Trust or,  if the balance  therein is  insufficient,
from  the Principal Account of such Trust.  All other amounts paid on redemption
shall be withdrawn from the Principal Account. The Trustee is empowered to  sell
underlying  Bonds of a  Trust in order  to make funds  available for redemption.
(See Section 21.) Units so redeemed shall be cancelled.
 
    To the extent that Bonds  are sold from a Trust,  the size and diversity  of
such  Trust will  be reduced. Such  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  Redemption Price is  determined on the  basis of the  BID prices of the
Bonds in each Trust, while  the initial Public Offering  Price of Units will  be
determined  on the  basis of the  OFFERING prices of  the Bonds as  of 4:00 p.m.
eastern time on any day on which  the Exchange is normally open for trading  and
such determination is made. As of any given time, the difference between the bid
and  offering  prices of  such Bonds  may be  expected  to average  1% to  2% of
principal amount in the case of  Bonds in National, Long Intermediate and  State
Trusts,  3/4%  to  1  1/2% in  the  case  of Bonds  in  Intermediate,  and Short
Intermediate Trusts and 1/2% to 3/4% in the case of Bonds in Short Term  Trusts.
In  the case of actively traded Bonds, the difference may be as little as 1/4 to
1/2 of 1%, and in  the case of inactively  traded Bonds such difference  usually
will  not exceed 3%. The difference between the aggregate offering prices of the
Bonds in each Trust  and the aggregate  bid prices thereof  on the business  day
prior  to  the Date  of Deposit  is shown  in the  discussion of  specific trust
matters.
 
    The right  of redemption  may be  suspended and  payment postponed  for  any
period  during  which the  Securities  and Exchange  Commission  determines that
trading in the municipal bond market is restricted or an emergency exists, as  a
result  of  which  disposal  or  evaluation  of  the  Bonds  is  not  reasonably
practicable, or for such other periods as the Securities and Exchange Commission
may by order permit.
 
    Under regulations issued by the  Internal Revenue Service, the Trustee  will
be  required to withhold 31% of the principal amount of a Unit redemption if the
Trustee has not  been furnished  the redeeming  Unitholder's tax  identification
number  in the manner  required by such  regulations. Any amount  so withheld is
transmitted to  the  Internal  Revenue  Service and  may  be  recovered  by  the
Unitholder  only when filing  his or her tax  return. Under normal circumstances
the Trustee obtains the Unitholder's tax identification number from the  selling
broker  at the time the Certificate or Book Entry Return Confirmation is issued,
and this number is printed on the Certificate or Book Entry Return  Confirmation
and on distribution statements. If a Unitholder's tax identification number does
not  appear as  described above,  or if it  is incorrect,  the Unitholder should
contact the Trustee before redeeming Units to determine what action, if any,  is
required to avoid this "back-up withholding."
 
20.  HOW UNITS MAY BE PURCHASED BY THE SPONSOR
 
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 it may
 
                                      A-33
<PAGE>
purchase such Units by notifying the Trustee before the close of business on the
second  succeeding business day and by making payment therefor to the Unitholder
not later than the day  on which payment would otherwise  have been made by  the
Trustee.  (See Section  19.) The  Sponsor's current  practice is  to bid  at the
Redemption Price  in the  secondary market.  Units held  by the  Sponsor may  be
tendered to the Trustee for redemption as any other Units.
 
    The  Public Offering  Price upon  resale of any  Units thus  acquired by the
Sponsor will be  calculated in accordance  with the procedure  described in  the
then currently effective prospectus relating to such Units. Any profit resulting
from  the resale of  such Units will  belong to the  Sponsor which likewise will
bear any loss resulting from a  lower Public Offering Price or Redemption  Price
subsequent to its acquisition of such Units.
 
21.  HOW BONDS MAY BE REMOVED FROM THE TRUSTS
 
Bonds will be removed from a Trust as they mature or are redeemed by the issuers
thereof.  See  the "Schedules  of Investments"  and "General  Trust Information"
under Section 3 for a discussion of call provisions of portfolio Bonds.
 
    The Indenture also  empowers the Trustee  to sell Bonds  for the purpose  of
redeeming  Units tendered by any Unitholder, and for the payment of expenses for
which income may not be available. Under the Indenture the Sponsor is  obligated
to  provide the Trustee with a current list of Bonds in each Trust to be sold in
such circumstances. In deciding which Bonds  should be sold the Sponsor  intends
to  consider, among  other things, such  factors as: (1)  market conditions; (2)
market  prices  of  the  Bonds;  (3)  the  effect  on  income  distributions  to
Unitholders  of the sale of various Bonds; (4) the effect on principal amount of
underlying Bonds  per Unit  of the  sale  of various  Bonds; (5)  the  financial
condition of the issuers; and (6) the effect of the sale of various Bonds on the
investment  character of the Trust. Such sales, if required, could result in the
sale of Bonds by the Trustee at prices less than original cost to the Trust.  To
the extent Bonds are sold, the size and diversity of such Trust will be reduced.
 
    In  addition, the  Sponsor is empowered  to direct the  Trustee to liquidate
Bonds upon the happening of certain other events, such as default in the payment
of principal and/or interest, an action of the issuer that will adversely affect
its ability to continue payment of the  principal of and interest on its  Bonds,
or  an  adverse  change  in  market, revenue  or  credit  factors  affecting the
investment character of the Bonds. If a default in the payment of the  principal
of  and/or interest  on any  of the Bonds  occurs, and  if the  Sponsor fails to
instruct the Trustee whether to  sell or continue to  hold such Bonds within  30
days  after notification  by the  Trustee to  the Sponsor  of such  default, the
Indenture provides that  the Trustee  shall liquidate said  Bonds forthwith  and
shall not be liable for any loss so incurred.
 
    In  connection with its determination  as to the sale  or liquidation of any
Bonds, the Sponsor  will consider the  Bond's then current  rating, but  because
such  ratings are the opinions of the rating agencies as to the quality of Bonds
they undertake to rate and not  absolute standards of quality, the Sponsor  will
exercise its independent judgment as to Bond creditworthiness.
 
    The Sponsor may also direct the Trustee to liquidate Bonds in a Trust if the
Bonds  in  the  Trust  are  the  subject  of  an  advanced  refunding, generally
considered to be when  refunding bonds are issued  and the proceeds thereof  are
deposited  in irrevocable trust to retire the refunded Bonds on their redemption
date.
 
    Except as stated in Section 4 regarding the limited right of substitution of
Replacement Bonds for Failed Bonds, and except for refunding securities that may
be exchanged for Bonds under certain conditions specified in the Indenture,  the
Indenture does not permit
 
                                      A-34
<PAGE>
either the Sponsor or the Trustee to acquire or deposit bonds either in addition
to, or in substitution for, any of the Bonds initially deposited in a Trust.
 
22.  INFORMATION ABOUT THE TRUSTEE
 
   
The Trustee is United States Trust Company of New York, with its principal place
of  business at 114 West 47th Street, New York, New York 10036 and its corporate
trust office at  770 Broadway,  New York, New  York 10003.  United States  Trust
Company  of New York, established in  1853, has, since its organization, engaged
primarily in the  management of trust  and agency accounts  for individuals  and
corporations. The Trustee is a member of the New York Clearing House Association
and  is subject to supervision and examination by the Superintendent of Banks of
the State of New York, the  Federal Deposit Insurance Corporation and the  Board
of  Governors of the Federal Reserve System.  In connection with the storage and
handling of  certain Bonds  deposited in  the Trusts,  the Trustee  may use  the
services   of  The  Depository  Trust  Company.  These  services  would  include
safekeeping of the Bonds and  coupon-clipping, computer book-entry transfer  and
institutional  delivery  services. The  Depository  Trust Company  is  a limited
purpose trust company organized under the Banking Law of the State of New  York,
a  member of the Federal  Reserve System and a  clearing agency registered under
the Securities  Exchange  Act  of  1934. Commencing  September  1,  1995,  Chase
Manhattan Bank, N.A. will become successor to United States Trust Company of New
York  as Trustee of  the Trusts. This  change will have  no material effect upon
Unitholders of the Trusts.
    
 
LIMITATIONS ON LIABILITIES OF SPONSOR AND TRUSTEE
 
    The Sponsor and the Trustee shall  be under no liability to Unitholders  for
taking  any action or for  refraining from any action  in good faith pursuant to
the Indenture, or for errors in judgment, but shall be liable only for their own
negligence, lack of good faith or  willful misconduct. 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
Indenture, the Trustee may act thereunder and shall not be liable for any action
taken by it in good faith under the Indenture.
 
    The Trustee shall not be liable for any taxes or other governmental  charges
imposed  upon or in respect of the Bonds or upon the interest thereon or upon it
as Trustee under  the Indenture or  upon or in  respect of any  Trust 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  Indenture  contains  other  customary  provisions  limiting  the
liability of the Trustee.
 
SUCCESSOR TRUSTEES AND SPONSORS
 
    The Trustee or any successor trustee  may resign by executing an  instrument
of resignation in writing and filing same with the Sponsor and mailing a copy of
a  notice of resignation to all Unitholders  then of record. Upon receiving such
notice, the Sponsor is required to promptly appoint a successor trustee. If  the
Trustee becomes incapable of acting or is adjudged a bankrupt or insolvent, or a
receiver  or other public officer shall take  charge of its property or affairs,
the  Sponsor  may  remove  the  Trustee  and  appoint  a  successor  by  written
instrument.  The resignation or  removal of a  trustee and the  appointment of a
successor trustee shall become effective only when the successor trustee accepts
its appointment as such. Any successor trustee shall be a corporation authorized
to exercise  corporate  trust  powers, having  capital,  surplus  and  undivided
profits of not less than $5,000,000. Any corporation into which a trustee may be
merged  or with which it may be  consolidated, or any corporation resulting from
any merger or consolidation to  which a trustee shall be  a party, shall be  the
successor trustee.
 
                                      A-35
<PAGE>
    If  upon resignation of  a trustee no  successor has been  appointed and has
accepted the appointment within 30 days after notification, the retiring trustee
may apply  to  a  court of  competent  jurisdiction  for the  appointment  of  a
successor.
 
    If the Sponsor fails to undertake any of its duties under the Indenture, and
no  express  provision is  made for  action by  the Trustee  in such  event, the
Trustee may, in addition to its other  powers under the Indenture (1) appoint  a
successor sponsor or (2) terminate the Indenture and liquidate the Trusts.
 
23.  INFORMATION ABOUT THE SPONSOR
 
John Nuveen & Co. Incorporated, the Sponsor and Underwriter, was founded in 1898
and  is  the oldest  and  largest investment  banking  firm specializing  in the
underwriting and distribution of tax-exempt securities and maintains the largest
research department in the investment  banking community devoted exclusively  to
the  analysis of municipal securities. In  1961 the Sponsor began sponsoring the
Nuveen Tax-Exempt Unit Trust and, since this  time, it has issued more than  $30
billion  in tax-exempt unit trusts, including over $8 billion in insured trusts.
The Sponsor is  also principal underwriter  of the Nuveen  Municipal Bond  Fund,
Inc.,  the Nuveen Tax-Exempt Money Market  Fund, Inc., Nuveen Tax-Free Reserves,
Inc., Nuveen California Tax-Free  Fund, Inc., Nuveen  Tax-Free Bond Fund,  Inc.,
Nuveen  Insured Tax-Free Bond Fund, Inc.  and Nuveen Tax-Free Money Market Fund,
Inc., all  registered open-end  management investment  companies, and  acted  as
co-managing  underwriter of Nuveen Municipal Value Fund, Inc., Nuveen California
Municipal Value Fund, Inc., Nuveen New  York Municipal Value Fund, Inc.,  Nuveen
Municipal  Income  Fund, Inc.,  Nuveen California  Municipal Income  Fund, Inc.,
Nuveen New York  Municipal Income  Fund, Inc., Nuveen  Premium Income  Municipal
Fund,  Inc.,  Nuveen Performance  Plus Municipal  Fund, Inc.,  Nuveen California
Performance  Plus  Municipal  Fund,  Inc.,  Nuveen  New  York  Performance  Plus
Municipal  Fund, Inc., Nuveen  Municipal Advantage Fund,  Inc., Nuveen Municipal
Market Opportunity Fund,  Inc., Nuveen California  Municipal Market  Opportunity
Fund,  Inc., Nuveen  New York  Municipal Market  Opportunity Fund,  Inc., Nuveen
Investment Quality Municipal  Fund, Inc., Nuveen  California Investment  Quality
Municipal  Fund, Inc., Nuveen New York  Investment Quality Municipal Fund, Inc.,
Nuveen Insured Quality Municipal Fund,  Inc., Nuveen Florida Investment  Quality
Municipal  Fund, Nuveen  Pennsylvania Investment Quality  Municipal Fund, Nuveen
New Jersey  Investment  Quality Municipal  Fund,  Inc., and  the  Nuveen  Select
Quality  Municipal Fund, Inc.,  Nuveen California Quality  Municipal Fund, Inc.,
Nuveen New  York Select  Quality  Municipal Fund,  Inc., Nuveen  Quality  Income
Municipal  Fund, Inc., Nuveen  Insured Municipal Opportunity  Fund, Inc., Nuveen
Florida Quality Income Municipal Fund, Nuveen Michigan Quality Income  Municipal
Fund,  Inc., Nuveen New Jersey Quality  Income Municipal Fund, Inc., Nuveen Ohio
Quality  Income  Municipal  Fund,  Inc.,  Nuveen  Pennsylvania  Quality   Income
Municipal  Fund, Nuveen Texas  Quality Income Municipal  Fund, Nuveen California
Quality Income Municipal Fund,  Inc., Nuveen New  York Quality Income  Municipal
Fund,  Inc., Nuveen Premier  Insured Municipal Income  Fund, Inc., Nuveen Select
Tax Free Income  Portfolio, Nuveen Select  Tax Free Income  Portfolio 2,  Nuveen
Insured  California Select  Tax-Free Income  Portfolio, Nuveen  Insured New York
Select Tax-Free Income Portfolio, Nuveen Premium Income Municipal Fund 2,  Inc.,
Nuveen  Select Tax Free  Income Portfolio 3,  Nuveen Select Maturities Municipal
Fund, Nuveen  Insured California  Premium Income  Municipal Fund,  Inc.,  Nuveen
Arizona  Premium  Income Municipal  Fund,  Inc., Nuveen  Insured  Premium Income
Municipal Fund,  Inc., Nuveen  Insured Florida  Premium Income  Municipal  Fund,
Nuveen  Michigan Premium Income Municipal Fund,  Inc., Nuveen New Jersey Premium
Income Municipal Fund, Inc.,  Nuveen Insured New  York Premium Income  Municipal
Fund, Inc., Nuveen Ohio Premium Income Municipal Fund, Inc., Nuveen Pennsylvania
Premium  Income  Municipal Fund,  Nuveen  Texas Premium  Income  Municipal Fund,
Nuveen  Premium   Income   Municipal   Fund   4,   Inc.,   Nuveen   Pennsylvania
 
                                      A-36
<PAGE>
Premium Income Municipal Fund 2, Nuveen Insured Florida Premium Income Municipal
Fund  2, Nuveen Maryland Premium Income  Municipal Fund, Nuveen Virginia Premium
Income Municipal  Fund,  Nuveen  Massachusetts Premium  Income  Municipal  Fund,
Nuveen  Insured California Premium Income Municipal Fund 2, Inc., Nuveen Insured
New York  Premium Income  Municipal Fund  2, Nuveen  New Jersey  Premium  Income
Municipal  Fund  2,  Nuveen  Washington Premium  Income  Municipal  Fund, Nuveen
Michigan  Premium  Income  Municipal  Fund  2,  Nuveen  Georgia  Premium  Income
Municipal   Fund,  Nuveen   Missouri  Premium  Income   Municipal  Fund,  Nuveen
Connecticut Premium Income Municipal Fund, Nuveen North Carolina Premium  Income
Municipal  Fund,  Nuveen  New Jersey  Premium  Income Municipal  Fund  3, Nuveen
Florida Premium Income Municipal Fund, Nuveen New York Premium Income  Municipal
Fund,  Nuveen  California  Premium Income  Municipal  Fund,  Nuveen Pennsylvania
Premium Income Municipal Fund 3, Nuveen Maryland Income Municipal Fund 2, Nuveen
Virginia Premium Income Municipal Fund  2, Nuveen Ohio Premium Income  Municipal
Fund  2,  Nuveen  Insured Premium  Income  Municipal Fund  2,  Nuveen California
Premium Income Municipal Fund 2, all registered closed-end management investment
companies.  These  registered  open-end  and  closed-end  investment   companies
currently  have  approximately  $32.8  billion  in  tax-exempt  securities under
management. Nationwide, more than 1,000,000 individual investors have  purchased
Nuveen's  tax exempt trusts and funds.  The present corporation was organized in
1967 as  a  wholly-owned subsidiary  of  Nuveen Corporation,  successor  to  the
original  John  Nuveen  & Co.  founded  in  1898 as  a  sole  proprietorship and
incorporated in  1953.  In  1974,  John  Nuveen  &  Co.  Incorporated  became  a
wholly-owned  subsidiary of The  St. Paul Companies,  Inc., a financial services
management company  located in  St. Paul,  Minnesota. On  May 19,  1992,  common
shares  comprising a  minority interest  in The  John Nuveen  Company ("JNC"), a
newly organized corporation which holds all  of the shares of Nuveen, were  sold
to  the  general  public in  an  initial  public offering.  St.  Paul  retains a
controlling interest in  JNC with over  70% of  JNC's shares. The  Sponsor is  a
member  of  the  National  Association  of  Securities  Dealers,  Inc.  and  the
Securities Industry Association and has its principal offices located in Chicago
(333 W. Wacker Drive) and New York  (Swiss Bank Tower, 10 East 50th Street).  It
maintains 14 regional offices.
 
    To help advisers and investors better understand and more efficiently use an
investment  in the Trust  to reach their investment  goals, the Trust's sponsor,
John Nuveen &  Co. Incorporated,  may advertise and  create specific  investment
programs  and  systems.  For  example, such  activities  may  include presenting
information on how to use  an investment in the  Trust, alone or in  combination
with  an investment in other mutual funds or unit investment trusts sponsored by
Nuveen, to accumulate  assets for  future education needs  or periodic  payments
such  as  insurance  premiums.  The  Trust's  sponsor  may  produce  software or
additional sales literature to promote the advantages of using the Trust to meet
these and other specific investor needs.
 
24.  OTHER INFORMATION
AMENDMENT OF INDENTURE
 
    The Indenture may  be amended  by the Trustee  and the  Sponsor without  the
consent  of any of  the Unitholders (1) to  cure any ambiguity  or to correct or
supplement any provision thereof which may be defective or inconsistent, or  (2)
to  make such  other provisions as  shall not adversely  affect the Unitholders,
provided, however, that the Indenture may not be amended to increase the  number
of Units in any Trust or to permit the deposit or acquisition of bonds either in
addition  to, or  in substitution  for any of  the Bonds  initially deposited in
 
                                      A-37
<PAGE>
any Trust  except  as  stated  in  Section 4  regarding  the  limited  right  of
substitution  of Replacement Bonds and except  for the substitution of refunding
bonds under certain circumstances. The  Trustee shall advise the Unitholders  of
any amendment promptly after execution thereof.
 
TERMINATION OF INDENTURE
 
    Each  Trust may be liquidated at any time  by written consent of 100% of the
Unitholders or by  the Trustee when  the value of  such Trust, as  shown by  any
evaluation,  is less than 20% of the original principal amount of such Trust and
will be  liquidated  by  the Trustee  in  the  event that  Units  not  yet  sold
aggregating  more  than 60%  of the  Units originally  created are  tendered for
redemption by the Sponsor thereby reducing the  net worth of such Trust to  less
than  40%  of the  principal amount  of  the Bonds  originally deposited  in the
portfolio. (See "Essential Information Regarding the Trusts.") The sale of Bonds
from the Trusts upon  termination may result in  realization of a lesser  amount
than  might otherwise be realized  if such sale were  not required at such time.
For this  reason,  among  others,  the amount  realized  by  a  Unitholder  upon
termination   may  be  less  than  the  principal  amount  of  Bonds  originally
represented by the Units held by  such Unitholder. The Indenture will  terminate
upon the redemption, sale or other disposition of the last Bond held thereunder,
but  in no event shall it continue beyond the end of the calendar year preceding
the fiftieth anniversary of its execution for National and State Trusts,  beyond
the  end  of  the  calendar  year preceding  the  twentieth  anniversary  of its
execution for Long Intermediate,  and Intermediate Trusts or  beyond the end  of
the  calendar year  preceding the tenth  anniversary of its  execution for Short
Intermediate and Short Term Trusts.
 
    Written notice of  any termination  specifying the  time or  times at  which
Unitholders  may surrender their Certificates, if any, for cancellation shall be
given by  the  Trustee  to each  Unitholder  at  the address  appearing  on  the
registration  books of the Trust maintained  by the Trustee. Within a reasonable
time thereafter the Trustee shall liquidate any Bonds in the Trust then held and
shall deduct  from  the assets  of  the Trust  any  accrued costs,  expenses  or
indemnities  provided  by  the  Indenture which  are  allocable  to  such Trust,
including estimated compensation of the Trustee and costs of liquidation and any
amounts required as a reserve to provide for payment of any applicable taxes  or
other  governmental charges. The Trustee shall then distribute to Unitholders of
such Trust their pro  rata share of  the balance of  the Interest and  Principal
Accounts.  With such  distribution the  Unitholders shall  be furnished  a final
distribution  statement,  in   substantially  the  same   form  as  the   annual
distribution statement, of the amount distributable. At such time as the Trustee
in  its sole discretion shall determine that  any amounts held in reserve are no
longer necessary, it shall make distribution thereof to Unitholders in the  same
manner.
 
LEGAL OPINION
 
    The legality of the Units offered hereby has been passed upon by Chapman and
Cutler, 111 West Monroe Street, Chicago, Illinois 60603. Special counsel for the
Trusts for respective state tax matters are named in "Tax Status" for each Trust
under  Section 3. Carter, Ledyard  & Milburn, 2 Wall  Street, New York, New York
10005, has acted as counsel for the Trustee with respect to the Series, and,  in
the absence of a New York Trust from the Series, as special New York tax counsel
for the Series.
 
AUDITORS
 
    The  Statements of Condition and Schedules of Investments at Date of Deposit
included  in  this  Prospectus  have  been  audited  by  Arthur  Andersen   LLP,
independent public accountants, as indicated in their report in this Prospectus,
and  are included herein in reliance upon  the authority of said firm as experts
in giving said report.
 
                                      A-38
<PAGE>
                            DESCRIPTION OF RATINGS*
 
    STANDARD & POOR'S.  A description of the applicable Standard & Poor's rating
symbols and their meanings follows:
 
    A Standard & Poor's rating is  a current assessment of the  creditworthiness
of  an obligor with respect  to a specific debt  obligation. This assessment may
take into consideration obligors such as guarantors, insurers or lessees.
 
    The rating is  not a recommendation  to purchase, sell  or hold a  security,
inasmuch  as  it  does not  comment  as to  market  price or  suitability  for a
particular investor.
 
    The ratings are  based on  current information  furnished by  the issuer  or
obtained by Standard & Poor's from other sources it considers reliable. Standard
&  Poor's does not  perform an audit in  connection with any  rating and may, on
occasion, rely on unaudited financial  information. The ratings may be  changed,
suspended  or withdrawn as  a result of  changes in, or  unavailability of, such
information, or for other circumstances.
 
    The ratings are based, in varying degrees, on the following considerations:
 
     I.  Likelihood of default--capacity  and willingness of  the obligor as  to
         the timely payment of interest and repayment of principal in accordance
         with the terms of the obligation;
 
     II.  Nature of and provisions of the obligation;
 
    III.  Protection  afforded by, and  relative position of,  the obligation in
          the event of  bankruptcy, reorganization or  other arrangements  under
          the laws of bankruptcy and other laws affecting creditors' rights.
 
    AAA--This  is the  highest rating  assigned by Standard  & Poor's  to a debt
obligation. Capacity to pay interest and repay principal is extremely strong.
 
    AA--Bonds rated AA  have a very  strong capacity to  pay interest and  repay
principal, and differ from the highest rated issues only in small degree.
 
    A--Bonds rated A have a strong capacity to pay interest and repay principal,
although they are somewhat more susceptible to the adverse effects of changes in
circumstances and economic conditions than bonds in higher rated categories.
 
    BBB--Bonds  rated BBB  are regarded  as having  an adequate  capacity to pay
interest and repay principal. Whereas they normally exhibit adequate  protection
parameters,  adverse  economic  conditions or  changing  circumstances  are more
likely to lead to a  weakened capacity to pay  interest and repay principal  for
bonds in this category than for bonds in the higher rated categories.
 
    PLUS  (+) OR MINUS (-): The ratings from "AA" to "BB" may be modified by the
addition of a  plus or minus  sign to  show relative standing  within the  major
rating categories.
 
    PROVISIONAL   RATINGS:  The  letter   "p"  indicates  that   the  rating  is
provisional. A  provisional  rating assumes  the  successful completion  of  the
project  being financed by the  issuance of the bonds  being rated and indicates
that payment of debt service requirements is largely or entirely dependent  upon
the successful and timely completion of the project. This rating, however, while
addressing  credit quality  subsequent to  completion of  the project,  makes no
comment on the  likelihood of,  or the  risk of  default upon  failure of,  such
completion.  Accordingly,  the investor  should exercise  his own  judgment with
respect to such likelihood and risk.
 
----------
*As published by the rating companies.
 
                                      A-39
<PAGE>
    NOTE RATINGS:  A  Standard  &  Poor's note  rating  reflects  the  liquidity
concerns  and market access risks unique to notes.  Notes due in 3 years or less
will likely  receive a  note rating.  Notes maturing  beyond 3  years will  most
likely receive a long-term debt rating.
 
    Note rating symbols are as follows:
 
        SP-1  Very  strong  or strong  capacity to  pay principal  and interest.
              Those   issues   determined   to   possess   overwhelming   safety
              characteristics will be given a plus (+) designation.
 
        SP-2  Satisfactory capacity to pay principal and interest.
 
RATINGS OF INSURED TRUST UNITS.
 
    A  Standard &  Poor's rating  on the  units of  an insured  investment trust
(hereinafter referred  to collectively  as "units"  and "trusts")  is a  current
assessment  of  creditworthiness with  respect to  the  investment held  by such
trust. This assessment takes  into consideration the  financial capacity of  the
issuers  and of any guarantors, insurers,  lessees or mortgagors with respect to
such investments. The assessment, however, does not take into account the extent
to which  trust  expenses or  portfolio  asset sales  for  less than  the  trust
purchase  price  will  reduce payment  to  the  unitholder of  the  interest and
principal required to be paid on  the portfolio assets. In addition, the  rating
is  not a recommendation to purchase, sell or hold units, inasmuch as the rating
does not comment as to market price of the units or suitability for a particular
investor.
 
    Units rated "AAA" are composed exclusively of assets that are rated "AAA" by
Standard &  Poor's  and/or certain  short-term  investments. Standard  &  Poor's
defines  its  AAA rating  for  such assets  as  the highest  rating  assigned by
Standard &  Poor's to  a debt  obligation. Capacity  to pay  interest and  repay
principal  is very strong. However,  unit ratings may be  subject to revision or
withdrawal at any time by Standard & Poor's and each rating should be  evaluated
independently of any other rating.
 
    MOODY'S.   A brief description of  the applicable Moody's rating symbols and
their meanings follows:
 
    Aaa--Bonds which are rated Aaa are judged to be the best quality. They carry
the smallest degree of  investment risk and are  generally referred to as  "gilt
edge."  Interest payments are protected by a large or by an exceptionally stable
margin and principal is secure. While the various protective elements are likely
to change, such changes  as can be  visualized are most  unlikely to impair  the
fundamentally  strong position of such issues. Their safety is so absolute that,
with the  occasional  exception  of  oversupply in  a  few  specific  instances,
characteristically,  their  market  value  is affected  solely  by  money market
fluctuations.
 
    Aa--Bonds which  are rated  Aa  are judged  to be  of  high quality  by  all
standards. Together with the Aaa group they comprise what are generally known as
high  grade bonds. They are  rated lower than the  best bonds because margins of
protection may  not  be  as  large  as in  Aaa  securities  or  fluctuations  of
protective  elements may be of greater amplitude  or there may be other elements
present which  make the  long-term  risks appear  somewhat  larger than  in  Aaa
securities.  Their  market value  is virtually  immune to  all but  money market
influences, with  the  occasional exception  of  oversupply in  a  few  specific
instances.
 
    A--Bonds  which are rated A possess many favorable investment attributes and
are to be considered as upper medium grade obligations. Factors giving  security
to  principal and interest are considered  adequate, but elements may be present
which suggest a susceptibility to impairment sometime in the future. The  market
value  of A-rated bonds may be influenced to some degree by economic performance
during a sustained period of depressed business conditions, but, during  periods
of normalcy, A-rated bonds frequently move in
 
                                      A-40
<PAGE>
parallel  with  Aaa  and  Aa  obligations,  with  the  occasional  exception  of
oversupply in a few specific instances.
 
    Moody's bond rating  symbols may  contain numerical modifiers  of a  generic
rating  classification. The modifier 1 indicates that the bond ranks at the high
end of  its category;  the modifier  2 indicates  a mid-range  ranking; and  the
modifier 3 indicates that the issue ranks in the lower end of its generic rating
category.
 
    Baa--Bonds  which are rated Baa are  considered as medium grade obligations,
i.e., they are neither  highly protected nor  poorly secured. Interest  payments
and  principal security appear  adequate for the  present but certain protective
elements may be lacking or may  be characteristically unreliable over any  great
length  of time. Such  bonds lack outstanding  investment characteristics and in
fact have speculative  characteristics as  well. The market  value of  Baa-rated
bonds  is more  sensitive to changes  in economic circumstances,  and aside from
occasional speculative factors applying to some bonds of this class, Baa  market
valuations  move in parallel  with Aaa, Aa  and A obligations  during periods of
economic normalcy, except in instances of oversupply.
 
    Con. (--)--Bonds for which the security depends upon the completion of  some
act  or the  fulfillment of  some condition  are rated  conditionally. These are
bonds secured by (a)  earnings of projects under  construction, (b) earnings  of
projects  unseasoned  in  operation  experience, (c)  rentals  which  begin when
facilities are completed, or (d) payments to which some other limiting condition
attaches. Parenthetical rating denotes  probable credit stature upon  completion
of construction or elimination of basis of condition.
 
    NOTE RATINGS:
 
    MIG 1--  This  designation denotes  best  quality. There  is  present strong
           protection by established cash  flows, superior liquidity support  or
           demonstrated broad-based access to the market for refinancing.
 
    MIG 2--  This designation  denotes high  quality. Margins  of protection are
           ample although not so large as in the preceding group.
 
                                      A-41
<PAGE>
                      (THIS PAGE INTENTIONALLY LEFT BLANK)
 
                                      A-42
<PAGE>
                      (THIS PAGE INTENTIONALLY LEFT BLANK)
 
                                      A-43
<PAGE>
                      (THIS PAGE INTENTIONALLY LEFT BLANK)
 
                                      A-44
<PAGE>
 
   
<TABLE>
<C>                <S>        <C>
           NUVEEN             Tax-Exempt Unit Trusts
 
                           PROSPECTUS
                           170,000 Units
                           California Insured Trust 253
                           New Jersey Insured Trust 196
                           New York Insured Trust 240
                           Pennsylvania Insured Trust
                           201
</TABLE>
    
 
<PAGE>
 
<TABLE>
<C>                 <S>        <C>
            NUVEEN             Tax-Exempt Unit Trusts
 
           SPONSOR             John Nuveen & Co. Incorporated
                               333 West Wacker Drive
                               Chicago, IL 60606-1286
                               Telephone: 312.917.7700
 
                               Swiss Bank Tower
                               10 East 50th Street
                               New York, NY 10022
                               212.207.2000
 
           TRUSTEE             United States Trust Company
                               of New York
                               770 Broadway
                               New York, NY 10003
                               800.257.8787
 
     LEGAL COUNSEL             Chapman and Cutler
        TO SPONSOR             111 West Monroe Street
                               Chicago, IL 60603
 
       INDEPENDENT             Arthur Andersen LLP
            PUBLIC             33 West Monroe Street
       ACCOUNTANTS             Chicago, IL 60603
    FOR THE TRUSTS
</TABLE>
 
   Except as to statements made herein furnished by the Trustee, the Trustee has
   assumed  no responsibility for the accuracy, adequacy and completeness of the
   information contained in this Prospectus.
                   This Prospectus does not contain  all of the information  set
   forth in the registration statement and exhibits relating thereto, filed with
   the   Securities  and  Exchange  Commission,   Washington,  D.C.,  under  the
   Securities Act of 1933, and to which reference is made.
                   No person is authorized  to give any  information or to  make
   representations  not contained in  this Prospectus or  in supplementary sales
   literature prepared by the Sponsor, and any information or representation not
   contained therein must not be relied upon as having been authorized by either
   the Trusts, the Trustee or the  Sponsor. 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.  The  Trusts  are registered  as  a  Unit Investment  Trust  under the
   Investment Company Act  of 1940. Such  registration does not  imply that  the
   Trusts  or any of their Units  has been guaranteed, sponsored, recommended or
   approved by the United States or any State or agency or officer thereof.
 
   
   820
    
  

<PAGE>
                  *********************************************
                  *    PRELIMINARY PROSPECTUS DATED  8/24/95  *
                  *********************************************
                          NUVEEN TAX-EXEMPT UNIT TRUST

------------------------------------------------------------------------------
    100,000 UNITS                                             SERIES 822
                                                     (A Unit Investment Trust)
------------------------------------------------------------------------------
 

    The attached final Prospectus for a prior Series is hereby used as a
preliminary Prospectus for the above-stated Series.  The narrative 
information and structure of the attached final Prospectus will be 
substantially the same as that of the final Prospectus for this Series.  
Although the attached Prospectus includes trusts as indicated 
therein, the specific trusts included in this Series when deposited may
differ from such trusts.  Information with respect to the actual trusts to
be included, pricing, the number of Units, dates and summary information
regarding the characteristics of securities to be deposited in this Series
is not now available and will be different since each Series has a unique
Portfolio.  Accordingly the information contained herein with regard to the
previous Series should be considered as being included for informational 
purposes only.  Ratings of the securities in this Series are expected to be
comparable to those of the securities deposited in the previous Series.
However, the Estimated Current Return for this Series will depend on the 
interest rates and offering prices of the securities in this Series and may
vary materially from that of the previous Series.

  **************************************************************************
  * A registration statement relating to the units of this Series has been *
  * filed with the Securities and Exchange Commission but has not yet      *
  * become effective.  Information contained herein is subject to comple-  *
  * tion or amendment.  Such Units may not be sold nor may offers to buy   *
  * be accepted prior to the time the registration statement becomes       *
  * effective.  This Prospectus shall not constitute an offer to sell      *
  * or the solicitation of an offer to buy nor shall there be any sale     *
  * of the Units in any state in which such offer, solicitation or sale    *
  * would be unlawful prior to registration or qualification under the     *
  * securities laws of any such state.                                     *
  **************************************************************************



<PAGE>

Statement of differences between electronic filing and printed document.
   Pursuant to Rule 499(c) (7) under the Securities Act of 1933 and Rule
0-11 under the Investment Company Act of 1940, Registrant hereby identifies
those differences in the foregoing document between the electronic format in
which it is filed and the printed form in which it will be circulated:
   (1) The printed and distributed prospectus may be paged differently
because the printed document may contain a different amount of information on
each page from that contained in the electronic transmission.
   (2) On the cover page, in the index and on the last page of the printed
document, solid vertical bars will appear.
   (3) In the printed document, footnote symbols may include a "dagger" or
multiple "dagger".  The "dagger" symbol is represented as # in the electronic
document.
   (4) The printed and distributed prospectus will not  contain the
preliminary prospectus legend included at the beginning of the first
prospectus page.


<PAGE>

                 NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 822

                             Cross-Reference Sheet

                     Pursuant to Rule 404(c) of Regulation C
                        under the Securities Act of 1933

               (Form N-8B-2 Items Required by Instruction 1 as
                           to Prospectus on Form S-6)

FORM N-8B-2                                      FORM S-6
ITEM NUMBER                                      HEADING IN PROSPECTUS

    I.   ORGANIZATION AND GENERAL INFORMATION

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

2.  Name and address of Depositor         )23 Information About the Sponsor

3.  Name and address of Trustee           )22 Information About the Trustee

4.  Name and address of principal         )23 Information About the Sponsor
    Underwriter                           )

5.  Organization of trust                 ) 1 What Is The Nuveen Tax-Exempt
                                          )   Unit Trust?

6.  Execution and termination of          ) 1 What Is The Nuveen Tax-Exempt
    Trust Agreement                       )   Unit Trust?
                                          )22 Information About the Trustee
                                          )24 Other Information

7.  Changes of Name                                    *

8.  Fiscal Year

9.  Litigation

    II.  GENERAL DESCRIPTION OF THE TRUST AND SECURITIES OF THE TRUST

10. General Information regarding         ) 3 Summary of Portfolios
    trust's securities                    ) 5 Why and How are the Bonds
                                              Insured?
                                           13 When Are Distributions
                                              Made to Unitholders?
                                          )18 Ownership and Transfer of Units
                                          )19 How Units May Be Redeemed
                                              Without Charge
                                          )21 How Bonds May Be Removed From
                                          )   The Trusts
                                          )22 Information About the Trustee
                                          )23 Information About the Sponsor
                                          )24 Other Information

                                          )11 What Is The Tax Status of
                                          )   Unitholders?

11. Type of securities comprising         ) 1 What Is The Nuveen Tax-Exempt
    units                                 )   Unit Trust?
                                          ) 3 Summary of Portfolios
                                          ) 4 Composition of Trusts
                                          ) 2 What Are The Objectives Of
                                          )   The Trusts?
                                            5 Why and How are the Bonds
                                              Insured?

12. Certain information regarding         )   *
    periodic payment certificates         )

13. (a)Load, fees, expenses, etc.         )ii Essential Information Regarding
                                          )   the Trusts on Date of Deposit of
                                                Bonds
                                          ) 6 How Is The Public Offering Price
                                          )   Determined?
                                          ) 7 Market For Units
                                          ) 8 What Is Accrued Interest?
                                          ) 9 What Is The Estimated Current
                                          )   Return?
                                          )10 How Was The Price Of The Bonds
                                          )    Determined At Date of Deposit?
                                          )12 What Are Normal Trust Operating
                                          )   Expenses?
                                          ) 3 Summary of Portfolios
                                          )13 When Are Distributions Made
                                          )   to Certificateholders?
                                          )15 How Detailed Are Reports To
                                                Certificateholders?


<PAGE>


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


    (c)Certain percentages                ) 6 How Is the Public Offering Price
                                          )   Determined?
                                          ) 7 Market For Units
                                          ) 9 What Is The Estimated Current
                                          )   Return?
                                          )10 How Was The Price of the Bonds
                                          )   Determined At Date of Deposit?
                                          ) 8 What is Accrued Interest?

    (d)Certain other fees, etc.           )10 How Was The Price Of The Bonds
       payable by holders                 )   Determined At Date of Deposit?
                                          )12 What Are Normal Trust Operating
                                          )   Expenses?
                                          )18 Ownership and Transfer of Units

    (e)Certain profits receivable         ) 4 Composition of Trusts
       by depositor, principal under-     )
       writer, trustee or affiliated      )20 How Units May Be Purchased By
       persons                            )   The Sponsor

    (f)Ratio of annual charges
       to income                                *

14. Issuance of trust's securities        ) 3 Summary of Portfolios
                                          )13 When Are Distributions Made
                                          )   To Unitholders?
                                          )18 Ownership and Transfer of Units
                                          )19 How Units May Be Redeemed
                                          )   Without Charge

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

16. Acquisition and Disposition of        ) 1 What Is The Nuveen Tax-Exempt
    Underlying Securities                 )   Unit Trust?
                                          ) 3 Summary of Portfolios
                                          ) 4 Composition of Trusts
                                          ) 5 Why and How are the Bonds
                                              Insured?
                                          )19 How Units May Be Redeemed
                                              Without Charge
                                          )21 How Bonds May Be Removed From
                                          )   The Trusts
                                          )24 Other Information

17. Withdrawal or redemption              ) 7 Market For Units
                                          )19 How Units May Be Redeemed
                                          )   Without Charge
                                          )20 How Units May Be Purchased By
                                          )   The Sponsor

18. (a)Receipt and disposition of income  ) 3 Summary of Portfolios
                                          )13 When Are  Distributions
                                              Made To Unitholders?
                                          )15 How Detailed Are Reports To
                                          )   Unitholders?

    (b)Reinvestment of distributions      )14 Accumulation Plan

    (c)Reserves or special funds          ) 3 Summary of Portfolios
                                          )13 When Are Distributions
                                          )   Made To Certificateholders?

    (d)Schedule of distributions          )   *

19. Records, accounts and reports         )13 When Are Distributions Made
                                          )   To Certificateholders?
                                          )15 How Detailed Are Reports To
                                          )   Certificateholders?

20. Certain miscellaneous provisions of   )22 Information About the Trustee
    Trust Agreement                       )23 Information About the Sponsor
                                          )24 Other Information


<PAGE>


21. Loans to security holders             )   *

22. Limitations on liability              ) 3 Summary of Portfolios
                                          ) 4 Composition of Trusts
                                          )22 Information About The Trustee

23. Bond arrangements                     )   *

24. Other material provisions of Trust    )   *
    Agreement.                            )

    III. ORGANIZATION, PERSONNEL AND AFFILIATED PERSONS OF DEPOSITOR

25. Organization of Depositor             )23 Information About the Sponsor

26. Fees received by Depositor            )   *

27. Business of Depositor                 )23 Information About the Sponsor

28. Certain information as to officials   )  *
    and affiliated persons of Depositor   )

29. Voting Securities of Depositor        )23 Information About the Sponsor

30. Persons controlling Depositor         )
                                          )
31. Payments by Depositor for certain     )
    services rendered to trust            )
                                          )   *
32. Payments by Depositor for certain     )
    other services rendered to trust      )
                                          )
33. Remuneration of employees of Depositor)
    for certain services rendered to trust)
                                          )
34. Remuneration of other persons for     )
    certain services rendered to trust    )

<PAGE>


    IV.  DISTRIBUTION AND REDEMPTION OF SECURITIES

35. Distribution of trust's securities by )
    states                                )
                                          )   *
36. Suspension of sales of trust's        )
    securities                            )
                                          )
37. Revocation of authority to distribute )

38. (a)Method of distribution             )
                                          )
    (b)Underwriting agreements            )17 How Units of The Trusts Are
                                          )   Distributed To The Public
    (c)Selling agreements                 )

39. (a)Organization of principal          )
         underwriter                      )
                                          )23 Information About The Sponsor
    (b)NASD membership of principal       )
         underwriter                      )

40. Certain fees received by principal    )   *
    underwriter


41. (a)Business of principal underwriter  )
                                          )
    (b)Branch offices of principal under- )    *
       writer                             )
                                          )
    (c)Salesmen of principal underwriter  )

42. Ownership of trust's securities by    )   *
    certain persons                       )
                                          )
43. Certain brokerage commissions received)   *
    by principal underwriter              )

44. (a)Method of valuation                )ii Essential Information Regarding
                                          )   The Trusts On Date Of Deposit Of
                                          )   Bonds
                                          ) 6 How Is The Public Offering Price
                                          )   Determined?
                                          )10 How Was The Price Of The Bonds
                                          )   Determined At Date of Deposit?
                                          )12 What Are Normal Trust Operating
                                          )   Expenses?


    (b)Schedule as to offering price      )   *

    (c)Variation in offering price to     ) 6 How Is the Public Offering Price
       certain persons                    )   Determined?
                                          ) 8 What Is Accrued Interest?
                                          )10 How Was The Price Of The Bonds
                                          )   Determined At Date of Deposit?

<PAGE>


45. Suspension of redemption rights       )   *

46. (a)Redemption valuation               )16 Unit Value and Evaluation
                                          )19 How Units May Be Redeemed
                                          )   Without Charge
                                          )20 How Units May Be Purchased By
                                          )   The Sponsor

    (b)Schedule as to redemption price    )   *

47. Maintenance of position in underlying ) 5 How Is the Public Offering Price
    securities                            )   Determined?
                                          )20 How Units May Be Purchased By
                                          )   The Sponsor

    V.   INFORMATION CONCERNING THE TRUSTEE OR CUSTODIAN

48. Organization and regulation of Trustee)21 Information About The Trustee

49. Fees and expenses of Trustee          )ii Essential Information Regarding
                                          )   The Trusts On Date of Deposit Of
                                          )   Bonds
                                          )12 What Are Normal Trust Operating
                                          )   Expenses?

50. Trustee's lien                        )12 What Are Normal Trust Operating
                                          )   Expenses?
                                          )13 When Are Distributions Made
                                          )   To Unitholders?

    VI.  INFORMATION CONCERNING INSURANCE OF HOLDERS OF SECURITIES

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

                        VII.  POLICY OF REGISTRANT

52. (a)Provisions of trust agreement with )12 What Are Normal Trust Operating
       respect to selection or elimination)   Expenses?
       of underlying securities           )19 How Units May Be Redeemed With-
                                          )   out Charge
                                          )21 How Bonds May Be Removed From
                                          )   The Trusts

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

    (c)Policy regarding substitution or   ) 3 Summary of Portfolio
       elimination of underlying          ) 4 Composition of Trusts
       securities                         )21 How Bonds May Be Removed From
                                          )   The Trusts

    (d)Fundamental policy not otherwise   )   *
       covered                            )

53. Tax status of trust                   )11 What Is The Tax Status Of
                                          )   Unitholders?

    VIII. FINANCIAL AND STATISTICAL INFORMATION

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

55.)                                      )   *
56.)Certain information regarding         )
57.)periodic payment certificates         )
58.)                                      )

__________

*Inapplicable, omitted, answer negative or not required.



<PAGE>

                       CONTENTS OF REGISTRATION STATEMENT

A.  BONDING ARRANGEMENTS OF DEPOSITOR:

    The Depositor has obtained the following Stockbrokers Blanket Bonds for
    its officers, directors and employees:

    INSURER/POLICY NO.                                     AMOUNT

    United Pacific Insurance Co.                           $10,000,000
    Reliance Insurance Company
    B 74 92 20

    Aetna Casualty and Surety                              $10,000,000
    08 F10618BCA

    St. Paul Insurance Co.                                 $ 6,000,000
    400 HC 1051

B.  This Registration Statement comprises the following papers and documents:

    The facing sheet

    The Prospectus

    The signatures

    Consents of Counsel

    Exhibits


<PAGE>


                                   SIGNATURES


    Pursuant to the requirements of the Securities Act of 1933, the 
Registrant, Nuveen Tax-Exempt Unit Trust, Series 822, has duly caused 
this Registration Statement to be signed on its behalf by the undersigned 
thereunto  duly authorized in the City of Chicago and State of Illinois 
on 8/24/95.
 

                               NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 822
                                  (Registrant)

                                  By JOHN NUVEEN & CO. INCORPORATED
                                  (Depositor)

                              
                                    By:  Larry Woods Martin 
                                         _______________________
                                         Vice President
                                         

                              
                                Attest:  Morrison C. Warren
                                         ___________________
                                         Assistant Secretary 
                                         


    Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons 
in the capacities and on the date indicated:

SIGNATURE                    *TITLE                        DATE

Richard J. Franke       Chairman, Board of Directors, )
                        Chief Executive Officer and   )
                        Director                      )
                                                      )
Donald E. Sveen         President, Chief Operating    )
                        Officer and Director          )
                                                      )
Anthony T. Dean         Executive Vice President and  )Larry Woods Martin
                        Director                      )Attorney-in-Fact**
                                                      )
Timothy T. Schwertfeger Executive Vice President and  )
                        Director                      )
                                                      )
O. Walter Renfftlen     Vice President and Controller )
                        (Principal Accounting Officer))
                                                      )
                                                      )8/24/95

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


*The titles of the persons named herein represent their capacity in and
relationship to John Nuveen & Co. Incorporated, the Depositor.

**The powers of attorney were filed on Form SE for Messrs. Franke, Sveen,
Renfftlen, Dean and Schwertfeger with the Amendment to the Registration
Statement on Form S-6 of Nuveen Tax-Exempt Unit Trust, Series 671
(File No. 33-49175). 




<PAGE>


                          CONSENT OF CHAPMAN AND CUTLER

    The consent of Chapman and Cutler to the use of its name in the Prospectus
included in the Registration Statement will be filed by Amendment.

                            CONSENT OF STATE COUNSEL

    The consents of special counsel to the Fund for state tax matters to the
use of their names in the Prospectus included in the Registration Statement
will be filed by Amendment.

                    CONSENT OF STANDARD + POOR'S CORPORATION

    The consent of Standard + Poor's Corporation to the use of its name
in the Prospectus included in the Registration Statement will be filed by
Amendment.

                    CONSENT OF KENNY S+P EVALUATION SERVICES

    The consent of Kenny S+P Evaluation Services to the use of its name in the
Prospectus included in the Registration Statement will be filed by Amendment.

                      CONSENT OF CARTER, LEDYARD & MILBURN

    The consent of Carter, Ledyard & Milburn to the use of its name in the
Prospectus included in the Registration Statement will be filed by Amendment.

                        CONSENT OF ARTHUR ANDERSEN LLP

    The consent of Arthur Andersen LLP to the use of its report and to the
reference to such firm in the Prospectus included in the Registration 
Statement will be filed by Amendment.



<PAGE>

LIST OF EXHIBITS:

    1.1(a)    Copy of Trust Indenture and Agreement between John Nuveen & Co.
              Incorporated, Depositor, and United States Trust Company of
              New York, Trustee.  Filed as Exhibit 1.1(A) to the Sponsor's
              Registration Statement filed with respect to Series 723
              (File No. 33-52527) and is incorporated herein by reference. 

    1.1(b)    Schedules to Trust Indenture and Agreement (to be supplied by
              amendment).

    1.2*      Copy of Certificate of Incorporation, as amended, of John Nuveen
              & Co. Incorporated, Depositor.

    1.3**     Copy of amendment of Certificate of Incorporation changing name
              of Depositor to John Nuveen & Co. Incorporated.

    2.1       Copy of Certificate of Ownership (included in Exhibit 1.1(A) and
              Incorporated herein by reference).

    3.1       Opinion of counsel as to legality of securities being registered
              (to be supplied by amendment).

    3.2       Opinion of counsel as to Federal income tax status of securities
              being registered (to be supplied by amendment).

    3.3       Consents of special state counsel to the Fund for state tax
              matters to use of their names in the Prospectus (to be supplied
              by amendment).

    4.1       Consent of Standard + Poor's Corporation (to be supplied by
              amendment).

    4.2       Consent of Kenny S+P Evaluation Services (to be supplied by
              amendment).

    4.3       Consent of Carter, Ledyard & Milburn (to be supplied by
              amendment).

    6.1       List of Directors and Officers of Depositor and other related
              information (incorporated by reference to Form S-6 [File 
              No. 33-58059] filed on March 13, 1995 on behalf of Nuveen
              Tax-Exempt Unit Trust, Series 795).

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

*Incorporated by reference to Form N-8B-2 (File No. 811-1547) filed on 
behalf of Nuveen Tax-Exempt Unit Trust, Series 16.

**Incorporated by reference to Form N-8B-2 (File No. 811-2198) filed on 
behalf of Nuveen Tax-Exempt Unit Trust, Series 37.


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