NUVEEN TAX EXEMPT UNIT TRUST SERIES 724
S-6EL24/A, 1994-03-30
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<PAGE>
                                                      40 ACT FILE NO. 811-2271
                                                      SEC NO. 33-52527

                       SECURITIES AND EXCHANGE COMMISSION

                                Washington, D.C.  20549

                         PRE-EFFECTIVE AMENDMENT NO. 1 TO
                                    FORM S-6

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

A.  Exact Name of Trust:     NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 723
                             (FORMERLY FILED AS NUVEEN TAX-EXEMPT UNIT 
                             TRUST, SERIES 724 ON MARCH 7, 1994)

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:  Daniel C. Bird, Jr.
                             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>
 
   
                                 MARCH 7, 1994
                             SUBJECT TO COMPLETION
NUVEEN  Tax-Exempt Unit Trusts
             PROSPECTUS
            Series 724
             March 7, 1994
    
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  724 consists  of  three  underlying
separate  unit investment trusts  designated as Maryland  Traditional Trust 291,
National Insured Trust 265  and Arizona Insured Trust  31. 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
Corporation or  Moody's Investors  Service, Inc.  on the  Date of  Deposit.  All
obligations  in each Insured Trust are covered by policies of insurance obtained
from the Municipal Bond Investors Assurance 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 Investors Service,  Inc. and  the Bonds in  the Insured  Trusts and  the
Units  of each such Trust  have received a rating of  "AAA" by Standard & Poor's
Corporation. 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.
 
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.) For Estimated Cash Flow Tables for Short Intermediate Insured  Trust
, see page 21.
    
 
   
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  five 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
 
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>
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.
 
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
      Maryland Traditional Trust 291                          3         8-14
      National Insured Trust 265                              3        15-19
      Arizona Insured Trust 31                                3        20-26
      GENERAL MATTERS
      Accrued Interest                                        8         A-16
      Accumulation Plan                                      14         A-23
      Bonds, How Selected                                     3            7
      Bonds, Initial Determination of Offering Price         10         A-17
      Bonds, Limited Right of Substitution                    4          A-7
      Bond Ratings                                            3         8-26
      Bonds, Removal from Trust                              21         A-32
      Call Provisions of Portfolio Bonds                   3, 4         8-26
      Capital Gains Taxability                               11         A-18
      Dealer Discount                                        17         A-28
      Description of Units of Trust                           1            5
      Distributions to Unitholders                           13         A-22
      Distribution Payment Dates                          3, 13   8-26, A-22
      Distribution of Units to the Public                    17         A-27
      Essential Information Regarding the Trusts             --            4
      Estimated Long Term Return and Estimated Current
      Return                                                  9      3, A-16
      Evaluation                                             16         A-27
      Expenses to Fund                                       12         A-21
      Insurance on Bonds in the Insured Trusts                5          A-9
      Insurance on Certain Bonds in the Traditional
      Trusts                                                  5         A-12
      Interest Income to Trust                                3         8-26
      Investments, Schedules of                               3         8-26
      Legality of Units                                      24         A-36
      Limitations on Liabilities of Sponsor and Trustee       22        A-33
      Market for Units                                        7         A-15
      Minimum Transaction                                    17         A-29
      Objectives of the Trusts                                2            6
      Optional Distribution Plan                             13         A-22
      Other Information                                      24         A-35
      Ownership and Transfer of Units                        18         A-29
      Public Offering Price of Units                          6         A-12
      Quantity Purchases                                      6         A-13
      Record Dates                                           13         A-22
      Ratings, Description of                                24         A-37
      Redemption of Units by Trustee                         19         A-29
      Reports to Unitholders                                 15         A-26
      Repurchase of Units by Sponsor                         20         A-31
      Sales Charge                                            6         A-12
      Sponsor, Information About                             23         A-33
      State Tax Status                                        3         8-26
      Successor Trustees and Sponsors                        22         A-33
      Tax Status of Unitholders                              11         A-18
      Trustee, Information About                             22         A-32
      Trust Indenture, Amendment and Termination             24         A-35
      Unit Value                                             16         A-26
</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>
  --------------------------------------------------------------------------------------
  Maryland Traditional Trust 291...........      4.82%         4.85%           4.87%
  National Insured Trust 265...............      5.51%         5.54%           5.55%
  Arizona Insured Trust 31.................      4.76%         4.78%           4.80%
</TABLE>
 
                           Estimated Current Returns
 
<TABLE>
<CAPTION>
                                                          PLAN OF DISTRIBUTION
                                                ----------------------------------------
                    TRUST                       MONTHLY      QUARTERLY      SEMI-ANNUAL
  <S>                                           <C>          <C>            <C>
  --------------------------------------------------------------------------------------
  Maryland Traditional Trust 291...........      4.79%         4.82%           4.83%
  National Insured Trust 265...............      5.44%         5.47%           5.49%
  Arizona Insured Trust 31.................      4.69%         4.72%           4.74%
</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
                                 MARCH 4, 1994+
    
           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>
                                                       Maryland            National             Arizona
                                                      Traditional           Insured             Insured
                                                       Trust 291           Trust 265           Trust 31
<S>                                                 <C>                 <C>                 <C>
                                                    ---------------     ---------------     ---------------
Principal Amount of Bonds in Trust................  $    3,500,000      $    7,500,000      $    3,500,000
Number of Units...................................          35,000              75,000              35,000
Fractional Undivided Interest in Trust Per Unit...        1/35,000            1/75,000            1/35,000
Public Offering Price--Less than 500 Units
    Aggregate Offering Price of Bonds in Trust....  $    3,419,801      $    7,323,112      $    3,404,687
    Divided by Number of Units....................  $        97.71      $        97.64      $        97.28
    Plus Sales Charge*............................  $         5.03      $         5.03      $         5.01
    Public Offering Price Per Unit(1).............  $       102.74      $       102.67      $       102.29
Redemption Price Per Unit (exclusive of accrued
  interest).......................................  $        97.25      $        97.16      $        96.82
Sponsor's Initial Repurchase Price Per Unit
  (exclusive of accrued interest).................  $        97.71      $        97.64      $        97.28
Excess of Public Offering Price Per Unit over
  Redemption Price Per Unit.......................  $         5.49      $         5.51      $         5.47
Excess of Public Offering Price Per Unit over
  Sponsor's Repurchase Price Per Unit.............  $         5.03      $         5.03      $         5.01
Calculation of Estimated Net Annual Interest
  Income Per Unit
    Annual Interest Income(2).....................  $       5.0870      $       5.7424      $       4.9744
    Less Estimated Annual Expense.................  $        .1711      $        .1598      $        .1751
                                                    ---------------     ---------------     ---------------
    Estimated Net Annual Interest Income(3).......  $       4.9159      $       5.5826      $       4.7993
Daily Rate of Accrual Per Unit....................  $       .01366      $       .01551      $       .01333
Estimated Current Return(4).......................           4.79%               5.44%               4.69%
Estimated Long Term Return(4).....................           4.82%               5.51%               4.76%
BECAUSE  CERTAIN OF THE BONDS IN THE TRUSTS WILL NOT BE DELIVERED TO THE TRUSTEE UNTIL AFTER THE SETTLEMENT
DATE FOR A PURCHASE OF UNITS MADE ON THE DATE OF DEPOSIT, INTEREST THAT ACCRUES ON THOSE BONDS BETWEEN  THE
DATE  OF DEPOSIT AND SUCH DELIVERY DATE WILL BE TREATED  AS A RETURN OF PRINCIPAL RATHER THAN AS TAX-EXEMPT
INCOME. THE AMOUNT OF  ANY SUCH RETURN  OF PRINCIPAL IS NOT  INCLUDED IN THE  ANNUAL INTEREST INCOME  SHOWN
ABOVE. FOR THE VARIOUS TRUSTS, THE FOLLOWING SETS FORTH THE LATEST SCHEDULED BOND DELIVERY DATE, THE AMOUNT
PER  UNIT THAT WILL BE TREATED AS A RETURN OF PRINCIPAL TO UNITHOLDERS WHO PURCHASE ON THE DATE OF DEPOSIT,
AND THE ESTIMATED CURRENT RETURN AFTER THE FIRST YEAR, ASSUMING THE PORTFOLIO AND ESTIMATED ANNUAL EXPENSES
DO NOT VARY FROM THAT SET FORTH ABOVE (SEE SECTIONS 3 AND 12 AND THE "SCHEDULES OF INVESTMENTS"):
                                   LATEST SCHEDULED         PER UNIT         ESTIMATED CURRENT RETURN
                                    DELIVERY DATE     RETURN OF PRINCIPAL      AFTER THE FIRST YEAR
                                  ------------------  --------------------   -------------------------
  NATIONAL INSURED TRUST........    MARCH 24, 1994    $           .06                     5.49        %
  ARIZONA INSURED TRUST.........  FEBRUARY 15, 1994   $           .01                     4.70        %
<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 five 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:
    Maryland Traditional Trust--$.10, National Insured Trust--$.11 and Arizona Insured Trust--$.09. (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.
</TABLE>
 
                                       4
<PAGE>
                   ESSENTIAL INFORMATION REGARDING THE TRUSTS
                                  (CONTINUED)
 
<TABLE>
<S>                                           <C>
Settlement Date...........................................................................
Record Dates................................................................See Section 13
Distribution Dates..........................................................See Section 13
Minimum Principal Distribution..............................................$0.10 Per Unit
Date Trusts Established......................................................March 7, 1994
Mandatory Termination Date..................................................See Section 24
Minimum Value of Each Trust.................................................See Section 24
Trustee's Maximum Annual Fee
    Traditional Trusts:..........................$    per $1,000 principal amount of Bonds
    Insured Trusts:..............................$    per $1,000 principal amount of Bonds
Sponsor's Annual Evaluation Fee..................$    per $1,000 principal amount of Bonds
</TABLE>
 
                             ---------------------
 
THE NUVEEN TAX-EXEMPT UNIT TRUST
   
SERIES 724
    
 
   
1.  WHAT IS THE NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 724?
    
 
   
Series  724 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  three
underlying separate unit investment trusts,  combined under one trust  indenture
and agreement, designated Maryland Traditional Trust 291, National Insured Trust
265  and Arizona Insured Trust 31.  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." This Series was created under  the
laws  of the State of New York pursuant to a Trust Indenture and Agreement dated
March 7, 1994  (the "Indenture")  between John  Nuveen &  Co. Incorporated  (the
"Sponsor") and United States Trust Company of New York (the "Trustee").
    
 
   
    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 $22,000,000 (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: $3,500,000 in the Maryland Traditional Trust,
    
 
                                       5
<PAGE>
   
$7,500,000  in the National Insured Trust  and $3,500,000 in the Arizona 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 35,000  Units
of  the Maryland Traditional  Trust, 75,000 Units of  the National Insured Trust
and 35,000  Units  of  the  Arizona  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. Only Units of
the National  Insured Trust  are offered  for sale  to Virginia  and  Washington
residents by this Prospectus.
    
 
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 Municipal Bond
Investors  Assurance  Corporation,  and  as  a  result  of  such  insurance  the
obligations in the Insured Trusts are rated "Aaa" by Moody's Investors  Service,
Inc. and "AAA" by Standard & Poor's Corporation. (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  Corporation  or  Moody's  Investors
Service,  Inc.  (including  provisional or  conditional  ratings).  In addition,
certain Bonds  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.
 
                                       6
<PAGE>
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 Corporation  rating of  the
Bonds  or the Moody's Investors Service, Inc. 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 Municipal Bond Investors Assurance Corporation insurance on such
Bonds.
 
    In order for Bonds in the Insured  Trusts to be eligible for Municipal  Bond
Investors Assurance 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>
   
MARYLAND TRADITIONAL TRUST 291
    
 
   
    The  Portfolio of Maryland  Traditional Trust 291  consists of 8 obligations
issued by  entities located  in Maryland,  one obligation  issued by  an  entity
located  in the  District of  Columbia and two  obligations issued  by an entity
located in the Territory  of Puerto Rico.  Four Bonds in  the Trust are  general
obligations  of the  governmental entities  issuing them  and are  backed by the
taxing powers 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: Bridge and Toll Road Revenue, 1; Electrical System
Revenue, 1; Health Care Facility Revenue, 3; Transportation Facility Revenue, 1;
Municipal  Lease Revenue, 1. Eleven issues in the Trust were rated by Standard &
Poor's Corporation  as follows:  7--  AAA, 1--AA,  1--AA-, 1--A+,  1--A.  Eleven
issues were rated by Moody's Investors Service, Inc. as follows: 7--Aaa, 1--Aa1,
1--Aa, 2--A1.
    
 
   
    At  the Date of Deposit,  the average maturity of  the Bonds in the Maryland
Traditional Trust is 25.0 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 51.1% of the  aggregate principal amount of  the Bonds in  the
Trust (accounting for approximately 48.0% of the aggregate offering price of the
Bonds)  are original issue discount obligations. Certain of these original issue
discount obligations, amounting to  5.9% of the  aggregate principal amount  and
2.3%  of  the aggregate  offering price  of the  Bonds in  the Trust,  are "zero
coupon" bonds. See "GENERAL TRUST INFORMATION--ORIGINAL ISSUE DISCOUNT BONDS AND
STRIPPED  OBLIGATIONS"  for  a  discussion   of  the  characteristics  of   such
obligations and of the risks associated therewith.
    
 
    Approximately  32% of  the aggregate  principal amount  of the  Bonds in the
Trust are  obligations of  issuers  whose revenues  are primarily  derived  from
hospitals  or other health care  services. The source of  payment for certain of
these Bonds, accounting for 14% of the Trust (included in the above percentage),
is insured by  a commercial insurer.  Consequently, the credit  ratings of  such
Bonds  essentially  reflect  the strength  of  the insurance  or  guarantee and,
depending upon the actual structure of the bond issue, are typically rated "Aaa"
or "Aa" by Moody's or "AAA" or "AA" by Standard & Poor's.
 
    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 January 6,
1994 and February 3,  1994. 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>
  $3,405,559       $14,242           $178,263      $3,403,620                 .46%
</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
 
                                       8
<PAGE>
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 Maryland Traditional Trust, less estimated expenses, is estimated to  accrue
at  the  rate  of  $.01380  per  Unit per  day  under  the  semi-annual  plan of
distribution, $.01374 per Unit per day under the quarterly plan of  distribution
and  $.01366 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 Maryland Traditional 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
Maryland Traditional Trust                                        1994                               per Year
<S>                                     <C>            <C>            <C>            <C>        <C>
- ------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        4/1            5/1            8/1           11/1
Distribution Date.....................       4/15           5/15           8/15          11/15
- ----------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .2052(1)                                              $  4.9221
                                                        --------  $.4101 every month  --------
Quarterly Distribution Plan...........  $   .2052(1)   $   .4128(2)   $  1.2385      $  1.2385    $  4.9541
Semi-Annual Distribution Plan.........  $   .2052(1)   $   .4144(3)                  $  2.4865    $  4.9731
- ----------------------------------------------------------------------------------------------------------------
<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--MARYLAND TRADITIONAL TRUST
 
    For  a discussion  of the  Federal tax status  of income  earned on Maryland
Traditional Trust Units, see Section 11.
 
    The  assets   of   the   Maryland  Traditional   Trust   will   consist   of
interest-bearing  obligations issued by  or on behalf of  the State of Maryland,
its political subdivisions and authorities and, provided the interest thereon is
exempt from State income  taxes by the  laws or treaties  of the United  States,
obligations  issued  by  or  on  behalf of  the  United  States'  territories or
possessions, including Puerto Rico, Guam and the Virgin Islands, their political
subdivisions and authorities (the "Maryland Bonds").
 
                                       9
<PAGE>
    In the  opinion of  Venable, Baetjer  and Howard,  special counsel  for  the
Series for Maryland tax matters, under existing law:
 
        For   Maryland  state  and  local  income  tax  purposes,  the  Maryland
    Traditional Trust will not be taxable  as an association, and the income  of
    the  Maryland  Traditional  Trust  will  be treated  as  the  income  of the
    Unitholders.
 
        For Maryland  state and  local tax  purposes, interest  on the  Maryland
    Bonds which is exempt from Maryland state and local income tax when received
    by  the Maryland Traditional Trust, and  which would be exempt from Maryland
    state and local income tax if received directly by a Unitholder, will retain
    its status as tax-exempt interest when received by the Maryland  Traditional
    Trust and distributed to the Unitholders.
 
        Interest  derived from  the Maryland  Traditional Trust  by a Unitholder
    with respect to the Maryland Bonds will not be subject to Maryland state  or
    local  income  taxes;  provided that  interest  or profit  derived  from the
    Maryland Traditional Trust by a financial institution, as defined in Section
    8-101(c) of the Tax-General Article of the Annotated Code of Maryland,  will
    be  subject to the  Maryland state franchise  tax on financial institutions,
    except to the  extent such interest  is expressly exempt  from the  Maryland
    state  franchise tax  by the statutes  which authorize the  issuance of such
    Maryland Bonds  (See  Section  8-204  of the  Tax  General  Article  of  the
    Annotated Code of Maryland).
 
        A  Unitholder will not be subject to  Maryland state or local income tax
    with respect  to gain  realized when  Maryland Bonds  held in  the  Maryland
    Traditional  Trust  are sold,  redeemed, or  paid  at maturity,  except with
    respect to gain realized upon a  sale, redemption or payment at maturity  of
    such  Maryland  Bonds  as  are  issued by  or  on  behalf  of  United States
    territories or possessions,  their political  subdivisions and  authorities;
    such  gain will equal the proceeds of  sale, redemption or payment, less the
    tax basis of the Maryland Bonds (adjusted to reflect (a) the amortization of
    Bond premium or discount,  and (b) the deposit  in the Maryland  Traditional
    Trust  after the Unitholder's settlement date of Maryland Bonds with accrued
    interest).
 
        Although the  matter  is  not  free  from  doubt,  gain  realized  by  a
    Unitholder  from the  redemption, sale  or other  disposition of  a Maryland
    Traditional Trust Unit  (i) will  be subject  to Maryland  state income  tax
    except in the case of individual Unitholders who are not Maryland residents,
    and  (ii)  will be  subject  to Maryland  local income  tax  in the  case of
    individual Unitholders who are Maryland residents.
 
        If interest on  indebtedness incurred  or continued by  a Unitholder  to
    purchase  Units  in the  Maryland Traditional  Trust  is not  deductible for
    Federal income  tax purposes,  it will  also be  nondeductible for  Maryland
    state income tax purposes and, if applicable, local income tax purposes.
 
        Maryland Traditional Trust Units will be subject to Maryland inheritance
    and  estate tax  only if  held by  Maryland residents.  Neither the Maryland
    Bonds nor the Maryland Traditional Trust  Units will be subject to  Maryland
    personal property tax, sales tax or use tax.
 
ECONOMIC FACTORS--MARYLAND
 
    Some of the significant financial considerations relating to the investments
of  the Maryland  Traditional Trust  are summarized  below. This  information is
derived principally from official statements and preliminary official statements
released on or before May 13,
 
                                       10
<PAGE>
1992, relating to issues of  Maryland obligations and does  not purport to be  a
complete description.
 
    The  State's total expenditures  for the fiscal years  ending June 30, 1990,
June 30,  1991 and  June 30,  1992 were  $11.019, $11.304  and $11.657  billion,
respectively.  As of January 13, 1993,  it was estimated that total expenditures
for fiscal 1993 would be $11.897 billion. The State's General Fund, representing
approximately 55%-60% of each year's total budget, had a surplus on a  budgetary
basis  of $57 million in fiscal year 1990, $55 thousand in fiscal year 1991, and
a deficit of $56 million in fiscal 1992. The Governor of Maryland reduced fiscal
1993 appropriations by $56 million to offset the fiscal 1992 deficit. The  State
Constitution mandates a balanced budget.
 
    The  1993 fiscal year budget was enacted  in April 1992 which, together with
legislation enacted in 1992,  involved the transfer of  certain funds, new  fees
and  taxes, and alteration of certain statutory State expenditure programs. When
the 1993 budget was enacted, it was  estimated that the General Fund surplus  at
June  30, 1993 would be  approximately $10 million on  a budgetary basis. During
the final months of fiscal year 1992 and the initial months of fiscal year 1993,
collections of State revenues were below the levels estimated at the time of the
adoption of the 1993  budget. The Governor proposed  a cost containment plan  to
address  this revenue  shortfall and  to provide  reserves to  finance potential
deficiency appropriations.  On September  30, 1992,  the Board  of Public  Works
approved  the Governor's proposal to reduce  General Fund appropriations by $168
million. The Board  of Public  Works also  approved the  Governor's proposal  to
reduce  the special fund appropriations for  the Department of Transportation by
$30 million.  Legislation was  introduced at  the 1993  session of  the  General
Assembly  to  transfer this  $30 million  to the  General Fund,  as well  as $10
million from various other special funds. In a special session held in November,
1992, the  General Assembly  enacted  legislation reducing  State aid  to  local
governments  by  $147 million.  In addition,  other  elements of  the governor's
original cost  containment plan  are  in the  process  of being  implemented  or
revised.
 
    The  public indebtedness  of Maryland  and its  instrumentalities is divided
into three  basic types.  The  State issues  general  obligation bonds,  to  the
payment  of which the State ad valorem  property tax is exclusively pledged, for
capital improvements and for various State-sponsored projects. The Department of
Transportation  of  Maryland  issues  limited,  special  obligation  bonds   for
transportation purposes payable primarily from specific, fixed-rate excise taxes
and  other revenues  related mainly  to highway  use. Certain  authorities issue
obligations payable solely  from specific non-tax  enterprise fund revenues  and
for  which  the  State  has  no liability  and  has  given  no  moral obligation
assurance.
 
    According to the most recent available ratings, general obligation bonds  of
the  State of Maryland are rated "Aaa" by Moody's and "AAA" by Standard & Poor's
Corporation, as  are those  of  Baltimore County,  a separate  political  entity
surrounding  Baltimore  City.  General obligation  bonds  of  Montgomery County,
located in the suburbs of Washington, D.C., are rated "Aaa" by Moody's and "AAA"
by Standard & Poor's  Corporation. General obligation  bonds of Prince  George's
County,  the second largest metropolitan county, which is also in the suburbs of
Washington, D.C.,  are rated  "A1" by  Moody's and  "AA-" by  Standard &  Poor's
Corporation.  The general obligation bonds of  those other counties of the State
that are rated  by Moody's carry  an "A" rating  or better except  for those  of
Allegany  County,  which  are rated  "Baa".  The most  populous  municipality in
Maryland is Baltimore City, the general
 
                                       11
<PAGE>
obligaton bonds of which are rated "A1" by Moody's and "A" by Standard &  Poor's
Corporation.  The majority of Maryland Health and Higher Education Authority and
State Department  of Transportation  revenue bond  issues have  received an  "A"
rating or better from Moody's.
 
    While  the ratings and other factors  mentioned above indicate that Maryland
and its principal subdivisions  and agencies are addressing  the effects of  the
economic recession and, overall, are in satisfactory economic health, there can,
of  course, be  no assurance  that this  will continue  or that  particular bond
issues may not be adversely  affected by changes in  state or local economic  or
political conditions.
 
MARYLAND 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 1994 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.  Except
as  indicated below, 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.
 
                                       12
<PAGE>
 COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                  Federal
                 Adjusted      Combined
    Taxable        Gross      State* and                   Tax-Exempt Estimated Current Return
    Income        Income        Federal       --------------------------------------------------------------
   (1,000's)     (1,000's)     Tax Rate1      4.00%   4.25%   4.50%   4.75%   5.00%   5.25%   5.50%   5.75%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 38.0 $     0-111.8      21.5   %     5.10    5.41    5.73    6.05    6.37    6.69    7.01    7.32
    38.0- 91.9       0-111.8      33.5         6.02    6.39    6.77    7.14    7.52    7.89    8.27    8.65
                 111.8-167.7      34.0         6.06    6.44    6.82    7.20    7.58    7.95    8.33    8.71
    91.9-140.0       0-111.8      36.0         6.25    6.64    7.03    7.42    7.81    8.20    8.59    8.98
                 111.8-167.7      37.0         6.35    6.75    7.14    7.54    7.94    8.33    8.73    9.13
                 167.7-290.2      39.5         6.61    7.02    7.44    7.85    8.26    8.68    9.09    9.50
   140.0-150.0   111.8-167.7      42.0         6.90    7.33    7.76    8.19    8.62    9.05    9.48    9.91
                 167.7-290.2      44.5         7.21    7.66    8.11    8.56    9.01    9.46    9.91   10.36
   150.0-250.0   111.8-167.7      42.5         6.96    7.39    7.83    8.26    8.70    9.13    9.57   10.00
                 167.7-290.2      45.5         7.34    7.80    8.26    8.72    9.17    9.63   10.09   10.55
                  Over 290.2      42.5   2     6.96    7.39    7.83    8.26    8.70    9.13    9.57   10.00
    Over 250.0   167.7-290.2      49.0         7.84    8.33    8.82    9.31    9.80   10.29   10.78   11.27
                  Over 290.2      46.0   3     7.41    7.87    8.33    8.80    9.26    9.72   10.19   10.65
                COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION
 -----------------------------------------------------------------------------------------------------------
 
<CAPTION>
                  Federal
                 Adjusted      Combined
    Taxable        Gross      State* and                   Tax-Exempt Estimated Current Return
    Income        Income        Federal       --------------------------------------------------------------
   (1,000's)     (1,000's)     Tax Rate1      4.00%   4.25%   4.50%   4.75%   5.00%   5.25%   5.50%   5.75%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 22.8 $     0-111.8      21.5         5.10    5.41    5.73    6.05    6.37    6.69    7.01    7.32
    22.8- 55.1       0-111.8      33.5         6.02    6.39    6.77    7.14    7.52    7.89    8.27    8.65
    55.1-100.0       0-111.8      36.0         6.25    6.64    7.03    7.42    7.81    8.20    8.59    8.98
                 111.8-234.3      37.5         6.40    6.80    7.20    7.60    8.00    8.40    8.80    9.20
   100.0-115.0   111.8-234.3      38.5         6.50    6.91    7.32    7.72    8.13    8.54    8.94    9.35
   115.0-250.0   111.8-234.3      43.5         7.08    7.52    7.96    8.41    8.85    9.29    9.73   10.18
                  Over 234.3      42.5   2     6.96    7.39    7.83    8.26    8.70    9.13    9.57   10.00
    Over 250.0    Over 234.3      46.0   3     7.41    7.87    8.33    8.80    9.26    9.72   10.19   10.65
</TABLE>
 
- ------------------
 
     *  These tables approximate the effect of the exemption of distributions of
tax-exempt income from  the Maryland Trust  from county taxes,  assuming a  rate
equal  to 50%  of the  applicable Maryland  state income  tax rate.  In general,
Maryland  local  income  taxes  imposed   by  various  counties  are  equal   to
approximately  50% of the state income  tax liability, although Worcester County
currently imposes an income tax equal to 30% of the state income tax liability.
 
        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.
 
    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
CD's 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 CD's 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.
 
                                       13
<PAGE>
   
Nuveen Tax-Exempt Unit Trust
Schedule of Investments at Date of Deposit
March 7, 1994
MARYLAND TRADITIONAL TRUST 291
(Series 724)
    
 
<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>
- ---------------------------------------------------------------------------------------------------------------------------
$   525,000      Washington Metropolitan Area Transit Authority      2004 at 102        AAA         Aaa     $       527,625
                   (District of Columbia), Gross Revenue Transit
                   Refunding Bonds, Series 1993, 5.25% Due
                   7/1/14. (FGIC Insured.)
    105,000      Maryland Health and Higher Educational           No Optional Call      AA-         Aa               38,043
                   Facilities Authority, Revenue Bonds, The
                   Johns Hopkins Hospital Issue, Series 1990,
                   0.00% Due 7/1/13. (Original issue discount
                   bonds delivered on or about June 7, 1990 at a
                   price of 19.13% of principal amount.)
    500,000      Maryland Health and Higher Educational              2003 at 100        AAA         Aaa             493,750
                   Facilities Authority, Project and Refunding
                   Revenue Bonds, Sinai Hospital of Baltimore
                   Issue, Series 1993, 5.25% Due 7/1/23.
                   (Original issue discount bonds delivered on
                   or about June 29, 1993 at a price of 92.89%
                   of principal amount.)(AMBAC Insured.)
    525,000      Maryland Health and Higher Educational              2003 at 102         A          A1              508,085
                   Facilities Authority, Refunding Revenue
                   Bonds, Suburban Hospital Issue, Series 1993,
                   5.125% Due 7/1/21. (Original issue discount
                   bonds delivered on or about October 14, 1993
                   at a price of 94.689% of principal amount.)
    100,000      Maryland Transportation Authority,               No Optional Call      AAA         Aaa              41,263
                   Transportation Facilities Projects, Revenue
                   Bonds, Series 1992, 0.00% Due 7/1/11.
                   (Original issue discount bonds delivered on
                   or about September 9, 1992 at a price of
                   30.965% of principal amount.)(FGIC Insured.)
    525,000      Industrial Development Authority of Prince          2003 at 102        AAA         Aaa             526,313
                   George's County, Maryland, Refunding Lease
                   Revenue Bonds (Upper Marlboro Justice Center
                   Project), Series 1993, 5.25% Due 6/30/19.
                   (Original issue discount bonds delivered on
                   or about February 25, 1993 at a price of
                   91.667% of principal amount.)(MBIA Insured.)
    120,000      Prince George's County, Maryland, General           2004 at 102        AAA         Aaa             118,585
                   Obligation Consolidated Public Improvement
                   Bonds, Series 1994, 5.00% Due 3/15/12. (MBIA
                   Insured.)
    500,000      Prince George's County, Maryland, Pollution         2002 at 102         A+         A1              536,405
                   Control Revenue Refunding Bonds (Potomac
                   Electric Project), 1992 Series, 6.00% Due
                   9/1/22.
    120,000      Washington Suburban Sanitary District,              2004 at 102         AA         Aa1             118,441
                   Maryland, General Construction Refunding
                   Bonds of 1994, 5.00% Due 6/1/15. (General
                   Obligation Bonds.) (When issued.)
     35,000      Commonwealth of Puerto Rico, Public Improvement   2003 at 101 1/2      AAA         Aaa              35,448
                   Refunding Bonds, Series 1993 (General
                   Obligation Bonds.), 5.25% Due 7/1/18.
                   (Original issue discount bonds delivered on
                   or about July 15, 1993 at a price of 93.414%
                   of principal amount.)(MBIA Insured.)
    445,000     * Commonwealth of Puerto Rico, Public Improvement  2002 at 101 1/2      AAA         Aaa             475,843
                   Bonds of 1993 (General Obligation Bonds.),
                   5.875% Due 7/1/18. (AMBAC Insured.)
- -----------                                                                                                 ---------------
$ 3,500,000                                                                                                 $     3,419,801
- -----------                                                                                                 ---------------
- -----------                                                                                                 ---------------
</TABLE>
 
See Notes to Schedules of Investments, page 27.
 
   
* These Bonds,  or a  portion thereof,  have delivery  dates beyond  the  normal
  settlement  date. Their expected delivery date is February 14, 1994. Contracts
  relating to  Bonds  with delivery  dates  after  the date  of  settlement  for
  purchase  made  on the  Date of  Deposit constitute  approximately 13%  of the
  aggregate principal amount of the Trust. (See Section 4.)
    
 
                                       14
<PAGE>
   
NATIONAL INSURED TRUST 265
    
   
    The  Portfolio  of  National Insured  Trust  265  consists of  13  long term
(approximately 15 to 40 year maturities) obligations issued by entities  located
in  10  states. Thirteen  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, 2; College  and
University  Revenue,  1;  Electrical  System Revenue,  3;  Health  Care Facility
Revenue, 4;  Resource  Recovery  Revenue, 1;  Combination  Utility  Revenue,  1;
Municipal Lease Revenue, 1. All of the Bonds in the Trust, as insured, are rated
AAA  by Standard & Poor's Corporation and Aaa by Moody's Investors Service, Inc.
Twenty-four percent of the  principal amount of Bonds  in the Trust consists  of
issues  of entities  located in  the State  of Illinois;  such concentration may
involve more risk than if such Bonds  were issued by issuers located in  several
states.
    
 
   
    At  the Date of Deposit,  the average maturity of  the Bonds in the National
Insured Trust is 25.8  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  26.7% of the  aggregate principal amount of  the Bonds in the
Trust (accounting for approximately 25.8% 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  25% 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  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 between February 28,
1994 and March 3, 1994. 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>
  $7,301,035       $22,077           $434,859      $7,287,487                 .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 participated as either the sole underwriter or manager or as
a member of the syndicates which were the original underwriters of 28.7% of  the
aggregate principal amount of the Bonds.
    
 
                                       15
<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 National Insured Trust, less estimated  expenses, is estimated to accrue  at
the rate of $.01565 per Unit per day under the semi-annual plan of distribution,
$.01560  per Unit per day  under the quarterly plan  of distribution and $.01551
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  National 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
National Insured Trust                                   1994                                  1995                   per Year
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4698(1)                                                               $  5.6383
                                                              --------   $.4698 every month   --------
Quarterly Distribution Plan...........  $   .4698(1)   $   .9450(2)   $  1.4175      $  1.4175      $  1.4175      $  5.6703
Semi-Annual Distribution Plan.........  $   .4698(1)                  $  2.3705(3)                  $  2.8446      $  5.6893
- ---------------------------------------------------------------------------------------------------------------------------------
<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  2-month distribution;  subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution  under the semi-annual  distribution plan represents a  5-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--NATIONAL INSURED TRUST
 
    For  a discussion  of the  tax status of  income earned  on National Insured
Trust Units, see Section 11.
 
NATIONALLY DIVERSIFIED TRUST TAXABLE ESTIMATED CURRENT RETURN TABLE
(NATIONAL INSURED TRUST)
 
    The following tables show the approximate taxable estimated current  returns
for  individuals  that are  equivalent to  tax-exempt estimated  current returns
under  published  1994  marginal  Federal  tax  rates.  The  tables  incorporate
increased  tax  rates for  higher-income tax  payers that  were included  in the
Revenue Reconciliation Act of 1993. 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 income
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.
 
                                       16
<PAGE>
  MARGINAL FEDERAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  Federal
    Federal      Adjusted
    Taxable        Gross                                   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- 38.0 $     0-111.8      15.0   %     5.29    5.59    5.88    6.18    6.47    6.76    7.06    7.35
    38.0- 91.9       0-111.8      28.0         6.25    6.60    6.94    7.29    7.64    7.99    8.33    8.68
                 111.8-167.7      29.0         6.34    6.69    7.04    7.39    7.75    8.10    8.45    8.80
    91.9-140.0       0-111.8      31.0         6.52    6.88    7.25    7.61    7.97    8.33    8.70    9.06
                 111.8-167.7      32.0         6.62    6.99    7.35    7.72    8.09    8.46    8.82    9.19
                 167.7-290.2      34.5         6.87    7.25    7.63    8.02    8.40    8.78    9.16    9.54
   140.0-250.0   111.8-167.7      37.0         7.14    7.54    7.94    8.33    8.73    9.13    9.52    9.92
                 167.7-290.2      40.0         7.50    7.92    8.33    8.75    9.17    9.58   10.00   10.42
                  Over 290.2      37.0   2     7.14    7.54    7.94    8.33    8.73    9.13    9.52    9.92
    Over 250.0   167.7-290.2      44.0         8.04    8.48    8.93    9.38    9.82   10.27   10.71   11.16
                  Over 290.2      41.0   3     7.63    8.05    8.47    8.90    9.32    9.75   10.17   10.59
</TABLE>
 
  MARGINAL FEDERAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                  Federal
    Federal      Adjusted
    Taxable        Gross                                   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- 22.8 $     0-111.8      15.0   %     5.29    5.59    5.88    6.18    6.47    6.76    7.06    7.35
    22.8- 55.1       0-111.8      28.0         6.25    6.60    6.94    7.29    7.64    7.99    8.33    8.68
    55.1-115.0       0-111.8      31.0         6.52    6.88    7.25    7.61    7.97    8.33    8.70    9.06
                 111.8-234.3      32.5         6.67    7.04    7.41    7.78    8.15    8.52    8.89    9.26
   115.0-250.0   111.8-234.3      38.0         7.26    7.66    8.06    8.47    8.87    9.27    9.68   10.08
                  Over 234.3      37.0   2     7.14    7.54    7.94    8.33    8.73    9.13    9.52    9.92
    Over 250.0    Over 234.3      41.0   3     7.63    8.05    8.47    8.90    9.32    9.75   10.17   10.59
<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
CD's 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 CD's 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.
 
                                       17
<PAGE>
   
Nuveen Tax-Exempt Unit Trust
Schedule of Investments at Date of Deposit
March 7, 1994
NATIONAL INSURED TRUST 265
(Series 724)
    
 
<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     * Broward County, Florida, Certificates of           2004 at 102        AAA         Aaa     $       715,680
                   Participation, Series 1994A, 5.50% Due
                   6/1/13. (Original issue discount bonds will
                   be delivered on or about March 23, 1994 at a
                   price of 94.882% of principal amount.)(When
                   issued.)
    550,000      Orlando (Florida) Utilities Commission, Water       2002 at 102        AAA         Aaa             556,408
                   and Electric Subordinated Revenue Bonds,
                   Series 1992A, 6.00% Due 10/1/20.
  1,000,000     * Illinois Health Facilities Authority, Revenue      2004 at 102        AAA         Aaa             980,460
                   Bonds, Series 1994 (Southern Illinois
                   Hospital Services), 5.90% Due 3/1/20. (When
                   issued.)
    400,000      Metropolitan Pier and Exposition Authority          2003 at 102        AAA         Aaa             419,520
                   (Illinois), McCormick Place Expansion Project
                   Bonds, Series 1992A, 6.50% Due 6/15/27.
    400,000     * Solid Waste Agency of Northern Cook County         2003 at 100        AAA         Aaa             376,172
                   (Illinois), Contract Revenue Bonds, Series
                   1994, 5.50% Due 5/1/15. (When issued.)
    750,000      Massachusetts Health and Educational Facilities     2003 at 102        AAA         Aaa             695,325
                   Authority, Revenue Bonds, Lahey Clinic
                   Medical Center Issue, Series B, 5.375% Due
                   7/1/23. (Original issue discount bonds
                   delivered on or about April 27, 1993 at a
                   price of 94.511% of principal amount.)
    305,000      North Carolina Municipal Power Agency Number 1,     2003 at 100        AAA         Aaa             303,475
                   Catawba Electric Revenue Bonds, Series 1992,
                   5.75% Due 1/1/20. (Original issue discount
                   bonds delivered on or about December 10, 1992
                   at a price of 92.75% of principal amount.)
    115,000      State of Ohio (Ohio Higher Educational Facility     2003 at 102        AAA         Aaa             109,555
                   Commission), Higher Educational Facility
                   Revenue Bonds (Kenyon College Project),
                   5.375% Due 12/1/16.
    750,000      Pennsylvania Intergovernmental Cooperation          2003 at 100        AAA         Aaa             716,310
                   Authority, Special Tax Revenue Bonds (City of
                   Philadelphia Funding Program), Series of
                   1993, 5.625% Due 6/15/23.
    780,000      Piedmont Municipal Power Agency (South              2003 at 102        AAA         Aaa             798,346
                   Carolina), Electric Revenue Bonds, 1992
                   Refunding Series, 6.30% Due 1/1/22.
    750,000      North Central Texas Health Facilities               2003 at 100        AAA         Aaa             751,875
                   Development Corporation, Hospital Revenue
                   Refunding Bonds (Children's Medical Center of
                   Dallas Project), Series 1993, 6.00% Due
                   8/15/16.
</TABLE>
 
                                       18
<PAGE>
   
NATIONAL INSURED TRUST 265 (Continued)
    
<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      Washington Public Power Supply System, Nuclear      2003 at 102        AAA         Aaa             721,868
                   Project No. 1 Refunding Revenue Bonds, Series
                   1993A, 5.70% Due 7/1/17.
    200,000      Wisconsin Health and Educational Facilities         2003 at 102        AAA         Aaa             178,118
                   Authority Revenue Bonds, Series 1993 (Aurora
                   Health Care Obligated Group), 5.25% Due
                   8/15/23. (Original issue discount bonds
                   delivered on or about December 8, 1993 at a
                   price of 92.911% of principal amount.)
- -----------                                                                                                 ---------------
$ 7,500,000                                                                                                 $     7,323,112
- -----------                                                                                                 ---------------
- -----------                                                                                                 ---------------
</TABLE>
 
See Notes to Schedules of Investments, page 27.
 
   
* These Bonds,  or a  portion thereof,  have delivery  dates beyond  the  normal
  settlement  date. Their expected  delivery dates range from  March 22, 1994 to
  March 24, 1994. Contracts relating to Bonds with delivery dates after the date
  of  settlement  for  purchase   made  on  the   Date  of  Deposit   constitute
  approximately 29% of the aggregate principal amount of the Trust. (See Section
  4.)
    
 
                                       19
<PAGE>
   
ARIZONA INSURED TRUST 31
    
   
    The  Portfolio of Arizona Insured Trust  31 consists of 7 obligations issued
by entities located in Arizona and one obligation issued by an entity located in
the Territory of Puerto Rico. 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, 2;  Electrical  System  Revenue, 1;
Health Care Facility Revenue, 2; Water and/or Sewer Revenue, 2. All of the Bonds
in the Trust, as insured, are rated AAA by Standard & Poor's Corporation and Aaa
by Moody's Investors Service, Inc.
    
 
   
    At the Date of  Deposit, the average  maturity of the  Bonds in the  Arizona
Insured  Trust is 24.2  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 33.6% of the  aggregate principal amount of  the Bonds in  the
Trust (accounting for approximately 31.5% of the aggregate offering price of the
Bonds)  are original issue discount obligations. Certain of these original issue
discount obligations, amounting to  4.3% of the  aggregate principal amount  and
1.7%  of  the aggregate  offering price  of the  Bonds in  the Trust,  are "zero
coupon" bonds. See "GENERAL TRUST INFORMATION--ORIGINAL ISSUE DISCOUNT BONDS AND
STRIPPED  OBLIGATIONS"  for  a  discussion   of  the  characteristics  of   such
obligations and of the risks associated therewith.
    
 
    Approximately  21% 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  30% 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 February  1,
1994  and February 2,  1994. 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>
  $3,390,741       $13,946           $174,394      $3,388,499                 .46%
</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 Arizona Insured Trust,  less estimated expenses, is  estimated to accrue  at
the rate of $.01347 per Unit per day under the semi-annual plan of distribution,
$.01342  per Unit per day  under the quarterly plan  of distribution and $.01333
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
    
 
                                       20
<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 Arizona  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
Arizona Insured Trust                                    1994                          1995              per Year
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        5/1            8/1           11/1            2/1
Distribution Date.....................       5/15           8/15          11/15           2/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4006(1)                                                  $  4.8076
                                                          --------  $.4006 every month  --------
Quarterly Distribution Plan...........  $   .4006(1)   $  1.2099(2)   $  1.2099      $  1.2099        $  4.8396
Semi-Annual Distribution Plan.........  $   .4006(1)                  $  2.4293(3)                    $  4.8586
- --------------------------------------------------------------------------------------------------------------------
<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) Regular 3-month distribution.
(3) Regular 6-month distribution.
</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--ARIZONA INSURED TRUST
 
    For  a discussion  of the  Federal tax  status of  income earned  on Arizona
Insured Trust Units, see Section 11.
 
    The assets of the Trust will consist of interest-bearing obligations  issued
by  or  on  behalf  of  the  State  of  Arizona  (the  "State"),  its  political
subdivisions and authorities (the "Arizona Bonds"),  and by or on behalf of  the
government  of Puerto  Rico, the  government of Guam,  or the  government of the
Virgin Islands (collectively the  "Possession Bonds") (collectively the  Arizona
Bonds and Possession Bonds shall be referred to herein as the "Bonds"), provided
the interest on such Bonds is exempt from State income taxes.
 
    In  the opinion of Chapman and Cutler counsel to the Sponsor, under existing
law:
 
        For Arizona income tax purposes, each Unitholder will be treated as  the
    owner  of a pro rata portion of the Arizona Insured Trust, and the income of
    the Trust therefore will  be treated as the  income of the Unitholder  under
    State law.
 
        For  Arizona  income  tax  purposes,  interest  on  the  Bonds  which is
    excludable from Federal gross income and which is exempt from Arizona income
    taxes when  received  by the  Arizona  Insured  Trust, and  which  would  be
    excludable from Federal gross income and exempt from Arizona income taxes if
    received  directly by  a Unitholder,  will retain  its status  as tax-exempt
    interest when received by the Arizona  Insured Trust and distributed to  the
    Unitholders.
 
        To  the extent that interest derived from the Arizona Insured Trust by a
    Unitholder with  respect  to the  Bonds  is excludable  from  Federal  gross
    income, such interest will not be subject to Arizona income taxes.
 
        Each Unitholder will receive taxable gain or loss for Arizona income tax
    purposes  when Bonds held in the  Arizona Insured Trust are sold, exchanged,
    redeemed or paid at maturity, or when the Unitholder redeems or sells Units,
    at a price that differs from  original cost as adjusted for amortization  of
    Bond  discount or premium  and other basis  adjustments, including any basis
    reduction that may be required to reflect a Unitholder's share of  interest,
    if  any,  accruing on  Bonds during  the  interval between  the Unitholder's
    settlement date and the date such Bonds are delivered to the Arizona Insured
    Trust, if later.
 
                                       21
<PAGE>
        Amounts paid by the Insurer under an insurance policy or policies issued
    to the Trust, if any, with respect to the Bonds in the Trust which represent
    maturing interest  on defaulted  obligations  held by  the Trustee  will  be
    exempt  from State income taxes if, and to the same extent as, such interest
    would  have  been  so  exempt  if  paid  by  the  issuer  of  the  defaulted
    obligations.
 
        Arizona law does not permit a deduction for interest paid or incurred on
    indebtedness incurred or continued to purchase or carry Units in the Arizona
    Insured Trust, the interest on which is exempt from Arizona income taxes.
 
        Neither  the Bonds  nor the  Units will  be subject  to Arizona property
    taxes, sales tax or use tax.
 
ECONOMIC FACTORS--ARIZONA
 
    GENERAL ECONOMIC  CONDITIONS.   The following  brief summary  regarding  the
economy  of  Arizona is  based upon  information  drawn from  publicly available
sources and  is included  for the  purpose of  providing the  information  about
general  economic conditions that may  or may not affect  issuers of the Arizona
Bonds. The  Sponsor  has  not  independently verified  any  of  the  information
contained  in such publicly  available documents. Arizona  is the nation's sixth
largest state  in  terms of  area.  Arizona's main  economic/employment  sectors
include  services, tourism  and manufacturing.  Mining and  agriculture are also
significant, although  they  tend  to  be more  capital  than  labor  intensive.
Services  is the single largest economic sector. Many of these jobs are directly
related to tourism.
 
    According  to  Arizona  economic  indicators  released  as  of  June   1992,
unemployment  figures show 7.2  percent of Arizona's  population are unemployed,
compared to  a national  level of  7.5 percent  unemployment at  the same  time.
Maricopa  County reported 6.1 percent unemployment  and Pima County reported 5.0
percent unemployment. Significant employers in the state include the government,
the service industry and the trade  industry. Building permits were down in  all
areas  of the state  except for Pima  County. In addition,  home sales were down
approximately 28 percent  from the  previous year,  and retail  sales were  down
approximately 7 percent from the previous year.
 
    On  June 27, 1991,  America West Airlines filed  a Chapter 11 reorganization
petition in bankruptcy. America West was at one time the sixth largest  employer
in  Maricopa County, employing  approximately 10,000 persons  within the county,
and 15,000  nationwide.  The  airline  now  employs  close  to  7,000  employees
nationwide.  The effect of the America West bankruptcy on the state economy and,
more particularly, the Phoenix economy, is uncertain.
 
    Similarly, jobs will  be lost  by the  anticipated closing  of Williams  Air
Force  Base in Chandler, Arizona, in 1993.  Williams Air Force Base was selected
as one of the military installations to  be closed as a cost-cutting measure  by
the  Defense Base Closure and Realignment Commission, whose recommendations were
subsequently  approved  by  the  President  and  the  United  States  House   of
Representatives.  Williams Air Force Base  injects approximately $340 million in
the local economy annually, and employs 1,851 civilians.
 
    In 1986, the value of Arizona real estate began a steady decline, reflecting
a market  which had  been overbuilt  in  the previous  decade with  a  resulting
surplus  of  completed  inventory.  This  decline  adversely  affected  both the
construction  industry  and  those  Arizona  financial  institutions  which  had
aggressively  pursued many  facets of real  estate lending. In  the near future,
Arizona's financial institutions are likely  to continue to experience  problems
until  the  excess  inventories  of commercial  and  residential  properties are
absorbed. The problems  of the  financial institutions  have adversely  affected
employment  and  economic activity.  Longer-term  prospects are  brighter, since
population growth is still strong by  most standards, and Arizona's climate  and
tourist  industry still continue to stimulate  the state's economy. However, the
previously robust pace of growth by  financial institutions is not likely to  be
repeated over an extended period.
 
                                       22
<PAGE>
    BUDGETARY  PROCESS.  Arizona operates on a  fiscal year beginning July 1 and
ending June 30. Fiscal year 1992 refers to the year ending June 30, 1992.
 
    Total General Fund revenues of $3.4 billion were expected during fiscal year
1992. Approximately 45.8%  of this  budgeted revenue  comes from  sales and  use
taxes,  38.9% from  income taxes (both  individual and corporate)  and 5.2% from
property taxes.  All taxes  total  approximately $3.3  billion,  or 93%  of  the
General  Fund revenues. Non-tax  revenue includes items such  as income from the
state lottery, licenses, fees and  permits, and interest. Lottery income  totals
approximately 34.6% of non-tax revenue.
 
    For  fiscal year 1992,  the budget called for  expenditures of $2.7 billion.
These expenditures fell into the following major categories: education  (51.3%),
health  and welfare  (29.3%), protection  and safety  (9.8%), general government
(7.6%) and  inspection  and  regulation, natural  resources  and  transportation
(2.0%).  The State's general fund revenues for  fiscal year 1993 are budgeted at
$3.6 billion  and total  general  fund expenditures  for  fiscal year  1993  are
budgeted  at $3.65 billion.  Fiscal year 1993's  proposed expenditures fall into
the following major categories: education  (55.4%), health and welfare  (27.8%),
protection  and  safety (9.0%),  general  government (6.2%)  and  inspection and
regulation and natural resources (1.6%).
 
    Most or all of the Bonds of the Arizona Insured Trust are not obligations of
the State of Arizona, and  are not supported by  the State's taxing powers.  The
particular  source of payment and security for  each of the Bonds is detailed in
the instruments themselves and  in related offering materials.  There can be  no
assurances,  however, with respect to whether  the market value or marketability
of any of the Bonds issued by an entity other than the State of Arizona will  be
affected  by the  financial or  other condition  of the  State or  of any entity
located within the  State. In addition,  it should  be noted that  the State  of
Arizona,  as well as counties,  municipalities, political subdivisions and other
public authorities of the state, are subject to limitations imposed by Arizona's
constitution with respect to ad valorem taxation, bonded indebtedness and  other
matters.  For  example, the  state  legislature cannot  appropriate  revenues in
excess of 7% of the total personal income of the state in any fiscal year. These
limitations may  affect the  ability  of the  issuers  to generate  revenues  to
satisfy their debt obligations.
 
    Although  most  of  the  Bonds  in the  Arizona  Insured  Trust  are revenue
obligations of local governments  or authorities in the  State, there can be  no
assurance  that the  fiscal and economic  conditions referred to  above will not
affect the market  value or marketability  of the  Bonds or the  ability of  the
respective obligors to pay principal of and interest on the Bonds when due.
 
    The  State of Arizona was recently sued  by four named school districts with
an additional fifty school districts within the state participating in the suit,
claiming that the state's funding system  for school buildings and equipment  is
unconstitutional. The lawsuit does not seek damages, but requests that the court
order the State to create a new financing system that sets minimum standards for
buildings  and furnishings  that apply  on a  statewide basis.  A superior court
ruling has upheld the  constitutionality of the  State's school funding  system.
This  decision has been appealed and is currently in the State Court of Appeals.
It is  unclear, at  this time,  what affect  any judgment  would have  on  state
finances  or school district budgets. The  U.S. Department of Education recently
determined that  Arizona's  educational  funding system  did  not  meet  federal
requirements of equity. This determination could mean a loss in federal funds of
approximately $50 million.
 
    Certain  other circumstances are relevant to the market value, marketability
and payment of any hospital and health care revenue bonds in the Arizona Insured
Trust. The Arizona Legislature attempted unsuccessfully in its 1984 regular  and
special  sessions to  enact legislation designed  to control  health care costs,
ultimately adopting  three  referenda  measures placed  on  the  November,  1984
general  election ballot which in various ways would have regulated hospital and
health care  facility  expansions, rates  and  revenues.  At the  same  time,  a
coalition  of  Arizona  employers  proposed  two  initiatives  voted  on  in the
November,
 
                                       23
<PAGE>
1984 general election  which would  have created a  State agency  with power  to
regulate  hospital and health care facility  expansions and rates generally. All
of these referenda and  initiative propositions were rejected  by the voters  in
the November, 1984 general election. Pre-existing State certificate-of-need laws
regulating  hospital and  health care  facilities' expansions  and services have
expired, and a temporary moratorium  prohibiting hospital bed increases and  new
hospital  construction projects  and a  temporary freeze  on hospital  rates and
charges at June, 1984 levels has  also expired. Because of such expirations  and
increasing  health care costs, it is  expected that the Arizona Legislature will
at future sessions  continue to  attempt to adopt  legislation concerning  these
matters.  The effect of any such legislation  or of the continued absence of any
legislation  restricting  hospital  bed  increases  and  limiting  new  hospital
construction on the ability of Arizona hospitals and other health care providers
to pay debt service on their revenue bonds cannot be determined at this time.
 
    Arizona does not participate in the federally administered Medicaid program.
Instead,  the state administers  an alternative program,  AHCCCS, which provides
health  care  to   indigent  persons  meeting   certain  financial   eligibility
requirements,  through managed  care programs. In  fiscal year  1992, AHCCCS was
financed approximately 52.7% by federal funds,  33.1% by state funds, and  13.6%
by county funds.
 
    Under  state  law,  hospitals  retain  the  authority  to  raise  rates with
notification and review  by, but  not approval  from, the  Department of  Health
Services.  Hospitals in  Arizona have  experienced profitability  problems along
with those in other states. At least two Phoenix based hospitals have  defaulted
on  or reported difficulties  in meeting their bond  obligations during the past
three years.
 
    Insofar as tax-exempt Arizona public utility pollution control revenue bonds
are concerned, the issuance of such bonds and the periodic rate increases needed
to cover  operating costs  and debt  service are  subject to  regulation by  the
Arizona  Corporation Commission, the  only significant exception  being the Salt
River Project Agricultural Improvement  and Power District  which, as a  Federal
instrumentality,  is  exempt from  rate regulation.  On  July 15,  1991, several
creditors of Tucson Electric Power Company ("Tucson Electric") filed involuntary
petitions under Chapter 11 of the U.S. Bankruptcy Code to force Tucson Power  to
reorganize  under the supervision of the bankruptcy court. On December 31, 1991,
the Bankruptcy Court approved the utility's motion to dismiss the July  petition
after  five months of negotiations between  Tucson Electric and its creditors to
restructure the utility's debts and other obligations. In December 1992,  Tucson
Electric announced that it had completed its financial restructuring. In January
1993,  Tucson  Electric  asked the  Arizona  Corporation Commission  for  a 9.6%
average rate increase. Tucson  Electric serves approximately 270,000  customers,
primarily  in  the Tucson  area. Inability  of any  regulated public  utility to
secure necessary rate  increases could  adversely affect,  to an  indeterminable
extent, its ability to pay debt service on its pollution control revenue bonds.
 
ARIZONA 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 1994 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
 
                                       24
<PAGE>
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      4.00%   4.25%   4.50%   4.75%   5.00%   5.25%   5.50%   5.75%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 38.0 $     0-111.8      18.5   %     4.91    5.21    5.52    5.83    6.13    6.44    6.75    7.06
    38.0- 91.9       0-111.8      32.0         5.88    6.25    6.62    6.99    7.35    7.72    8.09    8.46
                 111.8-167.7      32.5         5.93    6.30    6.67    7.04    7.41    7.78    8.15    8.52
    91.9-140.0       0-111.8      35.5         6.20    6.59    6.98    7.36    7.75    8.14    8.53    8.91
                 111.8-167.7      36.5         6.30    6.69    7.09    7.48    7.87    8.27    8.66    9.06
                 167.7-290.2      38.5         6.50    6.91    7.32    7.72    8.13    8.54    8.94    9.35
   140.0-250.0   111.8-167.7      41.0         6.78    7.20    7.63    8.05    8.47    8.90    9.32    9.75
                 167.7-290.2      44.0         7.14    7.59    8.04    8.48    8.93    9.38    9.82   10.27
                  Over 290.2      41.0   2     6.78    7.20    7.63    8.05    8.47    8.90    9.32    9.75
    Over 250.0   167.7-290.2      48.0         7.69    8.17    8.65    9.13    9.62   10.10   10.58   11.06
                  Over 290.2      45.0   3     7.27    7.73    8.18    8.64    9.09    9.55   10.00   10.45
</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      4.00%   4.25%   4.50%   4.75%   5.00%   5.25%   5.50%   5.75%
 ------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
 <S>           <C>            <C>             <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
 $     0- 22.8 $     0-111.8      18.5   %     4.91    5.21    5.52    5.83    6.13    6.44    6.75    7.06
    22.8- 55.1       0-111.8      32.5         5.93    6.30    6.67    7.04    7.41    7.78    8.15    8.52
    55.1-115.0       0-111.8      35.5         6.20    6.59    6.98    7.36    7.75    8.14    8.53    8.91
                 111.8-234.3      37.0         6.35    6.75    7.14    7.54    7.94    8.33    8.73    9.13
   115.0-250.0   111.8-234.3      42.0         6.90    7.33    7.76    8.19    8.62    9.05    9.48    9.91
                  Over 234.3      41.5   2     6.84    7.26    7.69    8.12    8.55    8.97    9.40    9.83
    Over 250.0    Over 234.3      45.0   3     7.27    7.73    8.18    8.64    9.09    9.55   10.00   10.45
<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
CD's  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 CD's 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.
 
                                       25
<PAGE>
   
Nuveen Tax-Exempt Unit Trust
Schedule of Investments at Date of Deposit
March 7, 1994
ARIZONA INSURED TRUST 31
(Series 724)
    
 
<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>
- ---------------------------------------------------------------------------------------------------------------------------
$   525,000      The Industrial Development Authority of the         2003 at 102        AAA         Aaa     $       543,989
                   County of Maricopa (Arizona), Insured Health
                   Facility Revenue Bonds (Catholic Healthcare
                   West), 1993 Series A, 5.625% Due 7/1/23.
    525,000      Peoria Municipal Development Authority, Inc.        2003 at 101        AAA         Aaa             527,216
                   (Arizona), Municipal Facilities Revenue
                   Bonds, Series 1993, 5.20% Due 7/1/13.
    525,000      City of Phoenix Civic Improvement Corporation       2004 at 102        AAA         Aaa             510,547
                   (Arizona), Wastewater System Lease Revenue
                   Refunding Bonds, Series 1993, 5.00% Due
                   7/1/18.
    150,000      City of Phoenix, Arizona, Junior Lien Street     No Optional Call      AAA         Aaa              56,754
                   and Highway User, Revenue Refunding Bonds,
                   Series 1992A, 0.00% Due 7/1/12. (Original
                   issue discount bonds delivered on or about
                   January 6, 1993 at a price of 28.482% of
                   principal amount.)
    225,000      Pima County, Arizona, Sewer Revenue Refunding       2004 at 102        AAA         Aaa             223,745
                   Bonds, Series 1994A, 5.00% Due 7/1/10. (When
                   issued.)
    525,000      Salt River Project Agricultural Improvement and     2003 at 102        AAA         Aaa             526,313
                   Power District, Arizona, Salt River Project
                   Electric System Refunding Revenue Bonds, 1993
                   Series B, 5.25% Due 1/1/19.
    525,000     * University Medical Center Corporation (Tucson,     2003 at 102        AAA         Aaa             509,723
                   Arizona), Hospital Revenue Refunding Bonds,
                   Series 1993, 5.00% Due 7/1/21. (Original
                   issue discount bonds delivered on or about
                   June 8, 1993 at a price of 90.122% of
                   principal amount.)
    500,000      Commonwealth of Puerto Rico, Public Improvement   2003 at 101 1/2      AAA         Aaa             506,400
                   Refunding Bonds, Series 1993 (General
                   Obligation Bonds.), 5.25% Due 7/1/18.
                   (Original issue discount bonds delivered on
                   or about July 15, 1993 at a price of 93.414%
                   of principal amount.)
- -----------                                                                                                 ---------------
$ 3,500,000                                                                                                 $     3,404,687
- -----------                                                                                                 ---------------
- -----------                                                                                                 ---------------
</TABLE>
 
See Notes to Schedules of Investments, page 27.
 
   
* These  Bonds,  or a  portion thereof,  have delivery  dates beyond  the normal
  settlement date. Their expected delivery date is February 15, 1994.  Contracts
  relating  to  Bonds  with delivery  dates  after  the date  of  settlement for
  purchase made  on the  Date of  Deposit constitute  approximately 15%  of  the
  aggregate principal amount of the Trust. (See Section 4.)
    
 
                                       26
<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
        Corporation and Aaa by Moody's Investors Service, Inc. (See Section 5.)
 
    (4) As determined by Kenny S&P Evaluation Services 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  have
        been rounded to the nearest dollar.
 
                                       27
<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 724:
    
 
   
       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  724
     (comprising Maryland Traditional Trust 291, National Insured Trust 265
     and  Arizona Insured Trust  31), as of March  7, 1994. 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 724
     as of March 7, 1994, in conformity with generally accepted  accounting
     principles.
    
 
                                                      ARTHUR ANDERSEN & CO.
 
   
     Chicago, Illinois,
     March 7, 1994.
    
 
                                       28
<PAGE>
                            Statements of Condition
 
   
                    NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 724
    
 
   
(Maryland Traditional Trust 291, National Insured Trust 265 and Arizona Insured
                                   Trust 31)
    
   
                              As of March 7, 1994
    
 
<TABLE>
<CAPTION>
                                             Maryland            National             Arizona
                                            Traditional           Insured             Insured
    TRUST PROPERTY                           Trust 291           Trust 265           Trust 31
<S>                                       <C>                 <C>                 <C>
                                          ---------------     ---------------     ---------------
Sponsor's contracts to purchase
 Tax-Exempt Bonds, backed by an
 irrevocable letter of credit(1)(2).....  $     3,419,801     $     7,323,112     $     3,404,687
Accrued interest to March 7, 1994 on
  underlying Bonds(1)...................           30,544              61,990              22,549
                                          ---------------     ---------------     ---------------
            Total.......................  $     3,450,345     $     7,385,102     $     3,427,236
                                          ---------------     ---------------     ---------------
                                          ---------------     ---------------     ---------------
   LIABILITY AND INTEREST OF UNITHOLDERS
Liability:
    Accrued interest to March 7, 1994 on
      underlying Bonds(3)...............  $        30,544     $        61,990     $        22,549
                                          ---------------     ---------------     ---------------
Interest of Unitholders:
    Units of fractional undivided
      interest outstanding (Maryland
      Traditional Trust 291 --35,000;
      National Insured Trust 265--
      75,000; Arizona Insured Trust
      31--35,000)
      Cost to investors(4)..............  $     3,595,989     $     7,700,399     $     3,580,096
        Less: Gross underwriting
          commission(5).................         (176,188)           (377,287)           (175,409)
                                          ---------------     ---------------     ---------------
    Net amount applicable to
      investors.........................  $     3,419,801     $     7,323,112     $     3,404,687
                                          ---------------     ---------------     ---------------
            Total.......................  $     3,450,345     $     7,385,102     $     3,427,236
                                          ---------------     ---------------     ---------------
                                          ---------------     ---------------     ---------------
<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) 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.
(4) Aggregate Public Offering Price (exclusive of accrued interest) computed as set forth under Section 6.
(5) 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>
 
                                       29
<PAGE>
GENERAL TRUST INFORMATION
 
    An  investment in Units of any Trust should be made with an understanding of
the risks that  such an investment  may entail.  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.
 
    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  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
 
                                      A-1
<PAGE>
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 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
 
                                      A-2
<PAGE>
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 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
 
                                      A-3
<PAGE>
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  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
 
                                      A-4
<PAGE>
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 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.
 
                                      A-5
<PAGE>
    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  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
 
                                      A-6
<PAGE>
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 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 to all Unitholders  of the Trust involved of
such acquisition. 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
 
                                      A-7
<PAGE>
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;  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
 
                                      A-8
<PAGE>
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.
 
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 Municipal  Bond  Investors
Assurance  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
 
                                      A-9
<PAGE>
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 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 of
Columbia and the Commonwealth of Puerto Rico.
 
   
    As of December  31, 1992  the Insurer had  admitted assets  of $2.6  billion
(audited),  total liabilities of  $1.7 billion (audited),  and total capital and
surplus of  $896  million  (audited) determined  in  accordance  with  statutory
accounting   practices   prescribed   or  permitted   by   insurance  regulatory
authorities. As of December  31, 1993, the Insurer  had admitted assets of  $3.1
billion  (unaudited), total liabilities  of $2.1 billion  (unaudited), and total
capital and surplus of  $978 million (unaudited)  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.
    
 
    Effective December 31, 1989, MBIA  Inc. acquired Bond Investors Group,  Inc.
On  January 5, 1990, the  Insurer acquired all of  the outstanding stock of Bond
Investors Group, Inc., the parent of BIG,  now known as MBIA Insurance Corp.  of
Illinois.  Through a reinsurance agreement, BIG has ceded all of its net insured
risks, as well as its unearned premium and contingency reserves, to the  Insurer
and the Insurer has reinsured BIG's net outstanding exposure.
 
    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
 
                                      A-10
<PAGE>
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
                              AS OF JUNE 30, 1993.
                                (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.....................  $     9,670,645  $     8,278,113   $   1,392,532
Fireman's Fund Insurance Company........................        6,571,313        4,880,776       1,690,537
The Travelers Indemnity Company.........................       10,194,126        8,280,211       1,913,915
CIGNA Property and Casualty Company (formerly AEtna
  Insurance Company)....................................        6,198,088        5,634,331         563,757
The Continental Insurance Company.......................        2,574,504        2,223,194         351,310
                                                          ---------------  ---------------  ---------------
        Total...........................................  $    35,208,676  $    29,296,625   $   5,912,051
                                                          ---------------  ---------------  ---------------
                                                          ---------------  ---------------  ---------------
</TABLE>
 
    Standard  &  Poor's  Corporation  rates  all  new  issues  insured  by   the
Association "AAA" Prime Grade.
 
    Moody's  Investors Service 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 Investors Service 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  Ratings Group,  a division  of McGraw  Hill ("Standard &
Poor's") rates all new issues insured by the Insurer "AAA" Prime Grade."
 
    The Moody's  Investors Service  rating of  the Insurer  should be  evaluated
independently  of the  Standard & Poor's  Corporation 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.
 
    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
 
                                      A-11
<PAGE>
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 Investors  Service, Inc.  and/or "AAA"  by Standard  & Poor's
Corporation 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"),  Municipal  Bond  Investors  Assurance  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 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  Corporation has rated  the claims-paying ability  of each insurer "AAA,"
and Moody's Investors Service has rated all bonds insured by each such  insurer,
except  ConnieLee, "Aaa." Moody's Investor's Service  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.
    
 
                                      A-12
<PAGE>
   
    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 offering period  or units of any  other series of Nuveen  Tax-Exempt
Unit  Trusts in the primary 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 table
based on the amount of intended  aggregate purchases as expressed in the  letter
of  intent. By establishing a  letter of intent, a  Unitholder agrees that units
representing 5% of the total  amount of the intended  purchases will be held  in
escrow pending completion of these purchases. All distributions on units held in
escrow  will be credited to such  Unitholder's account. If total purchases, less
redemptions, 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,  less redemption, 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  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>        
                                                         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.
    
 
                                      A-13
<PAGE>
    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.
 
    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 semi-annual evaluation,  is
less  than 20% of the  original 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     $1,500,000
                                Under         to           to           to           to            to             to
Years to Maturity              $50,000      $99,999     $249,999     $499,999     $999,999     $1,499,999     $2,999,999
- ---------------------------  -----------  -----------  -----------  -----------  -----------  -------------  -------------
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>
                             -------------
                              $3,000,000
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
 
                                      A-14
<PAGE>
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.
 
    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 (five
business days after  purchase) will  be added to  the Public  Offering Price  to
determine the purchase price of Units.
 
    The  above graduated  sales charges  will apply  on all  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).
    
 
    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 this purpose, a "business
day" shall be any day on which the Exchange is normally open. (See Section 16.)
 
                                      A-15
<PAGE>
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 (five business days after purchase) as the  Trustee
can  complete the mechanics of registration. 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  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
 
                                      A-16
<PAGE>
not including, the date of settlement of the investor's purchase (five  business
days  after purchase), less any distributions from the related Interest Account.
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 fifth 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.
    
 
   
    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
    
 
                                      A-17
<PAGE>
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. 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  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 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.
 
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
 
                                      A-18
<PAGE>
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.) It  should  be  noted  that under
provisions of the Revenue Reconciliation Act  of 1993 (the "Tax Act")  described
below  that subject accretion of market discount on tax-exempt bonds to taxation
as ordinary income,  gain realized on  the sale  or redemption of  Bonds by  the
Trustee or of Units by a Unitholder that would have been treated as capital gain
under  prior law is treated as ordinary  income to the extent it is attributable
to accretion of market  discount. 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 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
 
                                      A-19
<PAGE>
    (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. 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 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
 
                                      A-20
<PAGE>
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 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
 
                                      A-21
<PAGE>
each Trust for regularly evaluating  the Bonds and for maintaining  surveillance
over the portfolio. (See Section 16.)
 
   
    For Traditional Trusts, the Trustee receives for ordinary recurring services
an  annual fee computed at $     per $1,000 principal amount of underlying Bonds
in the Trusts for that portion of each Trust under the monthly distribution plan
and $    and $    per $1,000 principal amount of underlying Bonds, respectively,
for  those  portions  of  each  Trust  representing  quarterly  and  semi-annual
distribution  plans;  for  Insured  Trusts, the  Trustee  receives  for ordinary
recurring services an annual fee computed at $    per $1,000 principal amount of
underlying Bonds in the Trusts for that portion of each Trust under the  monthly
distribution  plan and $     and $     per $1,000 principal amount of underlying
Bonds, respectively, for those portions of each Trust representing quarterly and
semi-annual distribution plans. 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.
 
    The Sponsor has borne all costs of creating and establishing the 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.
 
    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
 
                                      A-22
<PAGE>
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  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
 
                                      A-23
<PAGE>
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 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.
 
                                      A-24
<PAGE>
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 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
 
                                      A-25
<PAGE>
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  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.
 
                                      A-26
<PAGE>
    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 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
 
                                      A-27
<PAGE>
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-28
<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  $1,500,000
                              Under       to         to         to         to          to          to      $3,000,000
Years to Maturity            $50,000    $99,999   $249,999   $499,999   $999,999   $1,499,999  $2,999,999   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%       .70%       .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%      3.50%      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 1,000 Units to $100,000, 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.
 
    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 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
    
 
                                      A-29
<PAGE>
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 member  of an  approved
Medallion  Guarantee Program or in such other manner as may be 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.
 
    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  1/2%  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 1% 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
 
                                      A-30
<PAGE>
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 seventh calendar day following the date of tender, or if the  seventh
calendar day is not a business day, on the first business day prior thereto, the
Unitholder  will be entitled to receive in cash 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  fifth 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.
 
    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
 
                                      A-31
<PAGE>
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 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.
 
                                      A-32
<PAGE>
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  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
 
                                      A-33
<PAGE>
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.
 
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.
 
    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
 
                                      A-34
<PAGE>
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 Select Tax Free Income Portfolio 4, Nuveen Premium Income Municipal
Fund  3, Inc.,  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  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 Premium  Income
Municipal  Fund 5, 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,  Nuveen
Premium  Income Municipal  Fund 6,  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
 
                                      A-35
<PAGE>
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 (140  Broadway). It  maintains 12 regional
offices.
 
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 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
semi-annual 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
 
                                      A-36
<PAGE>
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  &  Co.,
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-37
<PAGE>
                            DESCRIPTION OF RATINGS*
 
    STANDARD & POOR'S CORPORATION.  A  description of the applicable Standard  &
Poor's Corporation 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-38
<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  Corporation'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 INVESTORS  SERVICE, INC.    A brief  description of  the  applicable
Moody's Investors Service, Inc. 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
 
                                      A-39
<PAGE>
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  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-40
<PAGE>
                      (THIS PAGE INTENTIONALLY LEFT BLANK)
 
                                      A-41
<PAGE>
                      (THIS PAGE INTENTIONALLY LEFT BLANK)
 
                                      A-42
<PAGE>
                      (THIS PAGE INTENTIONALLY LEFT BLANK)
 
                                      A-43
<PAGE>
 
<TABLE>
<C>                <S>        <C>
           NUVEEN             Tax-Exempt Unit Trusts
                           PROSPECTUS
                           220,000 Units
                           Maryland Traditional Trust
                           291
                           National Insured Trust 265
                           Arizona Insured Trust 31
</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 & Co.
            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.
 
   
   724
    

<PAGE>
                  *********************************************
                  *    PRELIMINARY PROSPECTUS DATED  03/07/94 *
                  *********************************************
                          NUVEEN TAX-EXEMPT UNIT TRUST

- ------------------------------------------------------------------------------
    100,000 UNITS                                             SERIES 724
                                                     (A Unit Investment Trust)
- ------------------------------------------------------------------------------
 

    The attached Preliminary Prospectus is based on a final Prospectus
for a prior 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 724

                             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 723 (formerly filed as 
Nuveen Tax-Exempt Unit Trust, Series 724 on March 7, 1994), has duly caused 
this Pre-effective Amendment No. 1 to the Registration Statement to be 
signed on its behalf by the undersigned thereunto duly authorized in the 
City of Chicago and State of Illinois on 03/29/94.
 

                               NUVEEN TAX-EXEMPT UNIT TRUST, SERIES 723
                                  (Registrant)

                                  By JOHN NUVEEN & CO. INCORPORATED
                                  (Depositor)

                              
                                    By:  James J. Wesolowski 
                                         _______________________
                                         Vice President
                                         

                              
                                Attest:  Larry Woods Martin
                                         ___________________
                                         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  )James J. Wesolowski
                        Director                      )Attorney-in-Fact**
                                                      )
Timothy T. Schwertfeger Executive Vice President and  )
                        Director                      )
                                                      )
O. Walter Renfftlen     Vice President and Controller )
                        (Principal Accounting Officer))
                                                      )
                                                      ) 03/29/94

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


*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 Schwerfeger 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 & CO.

    The consent of Arthur Andersen & Co. 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.   

    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 (to be supplied by amendment).

    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 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.

***Previously filed by Initial Registration Statement for the Trust.


<PAGE>

                                                       Chapman and Cutler
                                                Draft dated March 4, 1994


                              EXHIBIT 1.1(a)
                         

                                    
                                    
                                    
                                    
                      NUVEEN TAX-EXEMPT UNIT TRUST
                                    
                                    
                                    
                                    
                                    
                                    
                     ______________________________
                                    
                                    
                      TRUST INDENTURE AND AGREEMENT
                                    
                                 Between
                                    
                     JOHN NUVEEN & CO. INCORPORATED
                                         As Depositor
                                    
                                   And
                                    
                       UNITED STATES TRUST COMPANY
                               OF NEW YORK
                                        As Trustee
                                    
                                    
                     ______________________________


<PAGE>

                    TRUST INDENTURE AND AGREEMENT
                     NUVEEN TAX-EXEMPT UNIT TRUST
                          TABLE OF CONTENTS
<TABLE>
<CAPTION>
SECTION                       HEADING                                     PAGE
<C>                         <S>                                           <C>

PREAMBLES.....................................................................1
   Form of Certificates ......................................................2
   Form of Assignment.........................................................6
   Statement Regarding Distributions - Trusts other than Compound 
     Interest Trusts..........................................................6
ARTICLE I         DEFINITIONS.................................................7
ARTICLE II        DEPOSIT OF BONDS; ACCEPTANCE OF TRUST; FORM AND
                  ISSUANCE OF CERTIFICATES; INSURED TRUST BOND
                  INSURANCE..................................................11
   Section 2.01.    Deposit of Bonds.........................................11
   Section 2.02.    Acceptance of Trust......................................11
   Section 2.03.    Issue of Certificates and Establishment of Book Entry 
                    Positions................................................11
   Section 2.04.    Separate Trusts..........................................11
   Section 2.05.    Form of Certificates.....................................12
   Section 2.06.    Insured Trust Bond Insurance.............................12
ARTICLE III       ADMINISTRATION OF FUND.....................................13
   Section 3.01.    Initial Cost.............................................13
   Section 3.02.    Interest Account.........................................13
   Section 3.03.    Principal Account........................................13
   Section 3.04.    Reserve Account..........................................13
   Section 3.05.    Distributions............................................14
   Section 3.06.    Distribution Statements..................................18
   Section 3.07.    Sale of Bonds............................................19
   Section 3.08.    Refunding Bonds..........................................21
   Section 3.09.    Bond Counsel.............................................21
   Section 3.10.    Notice and Sale by Trustee...............................21
   Section 3.11.    Trustee Not to Amortize..................................22
   Section 3.12.    Liability of Depositor...................................22
   Section 3.13.    Notice to Depositor......................................22
   Section 3.14.    Limited Replacement of Special Bonds.....................22
</TABLE>
                                -i-

<PAGE>
<TABLE>
<C>                  <S>                                                  <C>
ARTICLE IV        EVALUATION, REDEMPTION, PURCHASE, TRANSFER OR
INTERCHANGE
                  OF UNITS AND REPLACEMENT OF CERTIFICATES...................24
   Section 4.01.    Evaluation...............................................24
   Section 4.02.    Redemptions by Trustee; Purchases by Depositor...........25
   Section 4.03.    Transfer or Interchange of Units.........................27
   Section 4.04.    Certificates Mutilated, Destroyed, Stolen or Lost........28
   Section 4.05.    Compensation of Depositor................................29
ARTICLE V         TRUSTEE....................................................29
   Section 5.01.    General Definition of Trustee's Liabilities, Rights and 
                    Duties...................................................29
   Section 5.02.    Books, Records and Reports...............................32
   Section 5.03.    Indenture and List of Bonds on File......................32
   Section 5.04.    Compensation.............................................32
   Section 5.05.    Removal and Resignation of Trustee; Successor............33
   Section 5.06.    Qualifications of Trustee................................35
ARTICLE VI        RIGHTS OF UNITHOLDERS......................................35
   Section 6.01.    Beneficiaries of Trust...................................35
   Section 6.02.    Rights, Terms and Conditions.............................35
ARTICLE VII       ADDITIONAL COVENANTS; MISCELLANEOUS
PROVISIONS.............36
   Section 7.01.    Amendments...............................................36
   Section 7.02.    Termination..............................................36
   Section 7.03.    Construction.............................................38
   Section 7.04.    Registration of Units....................................38
   Section 7.05.    Written Notice...........................................38
   Section 7.06.    Severability.............................................38
   Section 7.07.    Dissolution of Depositor Not to Terminate................38
EXECUTION....................................................................40
CERTAIN INFORMATION..................................................Schedule A
BONDS INITIALLY DEPOSITED............................Schedule B thru Schedule Q
</TABLE>
                         __________________________
           This Contents does not constitute part of the Indenture.

                                 -ii-
<PAGE>
     TRUST  INDENTURE  AND AGREEMENT dated as of the  date  indicated  in
Item 2  of Schedule A hereto, between JOHN NUVEEN & CO. INCORPORATED, 
as
Depositor, and UNITED STATES TRUST COMPANY OF NEW YORK, as Trustee.

     WITNESSETH that:

     WHEREAS,  it is desired to expand the market for certain obligations
the  interest income on which is not includible in gross income  pursuant
to  the applicable provisions of the United States Internal Revenue  Code
of   1986  or  pursuant  to  other  provisions  of  law,  some  of  which
obligations, as individual issues or parts thereof, might be  unavailable
or  impracticable as investments to certain individual investors, and  to
provide proper diversification to such investors, particularly those with
limited investment capital; and

     WHEREAS,  the  Depositor desires to provide for the  collection  and
distribution of the principal of and interest on such obligations by  the
Trustee  to  such  persons  as shall purchase  an  interest  therein,  as
hereinafter provided; and

     WHEREAS,  the  Depositor  has acquired and,  concurrently  with  the
execution  and delivery hereof, has deposited in trust with  the  Trustee
the Tax-exempt bonds and/or evidences of ownership interests in principal
and/or interest payments on such Tax-exempt bonds (the "BONDS") listed in
the  Schedules  attached  hereto  (or  delivery  statements  relating  to
contracts  for  the  purchase thereof), which  Schedules  set  forth  the
respective portfolios of the Nuveen Tax-Exempt Unit Trust of that  Series
indicated in Item 1 of Schedule A hereto hereinafter referred to  as  the
National Traditional Trust, the Long Intermediate Traditional Trust,  the
Intermediate Traditional Trust, the Short Intermediate Traditional Trust,
the  Short  Term  Traditional  Trust, the Compound  Interest  Traditional
Trust,  the National Insured Trust, the Long Intermediate Insured  Trust,
the Intermediate Insured Trust, the Short Intermediate Insured Trust, the
Short  Term Insured Trust and individual trusts consisting of  Bonds  the
interest  on  which  is exempt from certain taxation in  specific  states
("[State] Traditional Trust" or "[State] Intermediate Traditional  Trust"
or  "[State]  Insured Trust" or "[State] Intermediate Insured  Trust"  or
"[State]  Short Intermediate Insured Trust"), or any one or two  of  such
Trusts, included in the Fund, such Trusts being created hereunder and  to
be  held  by the Trustee in separate Trusts upon the terms and conditions
hereinafter set forth for the use and benefit of all owners of  units  of
the  respective Trusts of the Nuveen Tax-Exempt Unit Trust of that Series
indicated  in  Item 1  of  Schedule A  hereto  (hereinafter  called   the
"UNITS"); and

     WHEREAS, concurrently with the delivery to the Trustee of the  Bonds
listed in the Schedules attached hereto, the Insurer has delivered to and
deposited  with  the Trustee, a Municipal Bond Fund Insurance  Policy  or
Policies  to  protect  each  Insured Trust and  the  Unitholders  thereof
against  nonpayment of principal and interest when due  on  any  Bond  or
Bonds; and

     WHEREAS, concurrently with the receipt of the aforesaid deposit  the
Trustee  has  executed, in the name of the Depositor, a  Certificate  for

<PAGE>
each  of  the  monthly, quarterly and semi-annual plans  of  distribution
representing the ownership of all units of fractional undivided  interest
in  such  Bonds  and  in the respective Interest Accounts  and  Principal
Accounts  maintained  under  this Indenture  in  the  manner  hereinafter
provided, and will, upon receipt of confirmation of the effectiveness  of
the  registration  of the aforementioned Units with  the  Securities  and
Exchange Commission, deliver said certificates to the Depositor or,  upon
the  order  of  the  Depositor, to the Depository Trust Company  ("DTC"),
which  will  establish book entry positions in the aforementioned  Units;
and

     WHEREAS, for those Units which at any time or from time to time  may
be  held  in certificated form, the form of the certificates of ownership
in  the  respective  Trusts ("CERTIFICATES") shall  be  substantially  as
follows:

Number                                                Units
                    CERTIFICATE OF OWNERSHIP          Plan of
                                                      Distribution:
                         --Evidencing--               Monthly
                                                      Quarterly
                     An Undivided Interest            Semi-Annual
                                                      Not Applicable
                           --in the--                 CUSIP ____
                               
                               
                      NUVEEN TAX-EXEMPT UNIT TRUST,
                SERIES [the Series as indicated in Item 1
                     of Schedule A to the Indenture]
                   _________________________ Trust ___

     This  is to certify that _______________________________________  is
the  owner  and  registered  holder of this  Certificate  evidencing  the
ownership of ______ unit(s) of undivided interest ("UNITS") in the  above
Trust (herein called the "TRUST") of the related Series of the Nuveen Tax-
Exempt Unit Trust created by the Trust Indenture and Agreement pertaining
to  such Series (hereinafter called the "INDENTURE"), between JOHN NUVEEN
& CO. INCORPORATED (hereinafter called the "DEPOSITOR") and UNITED
STATES
TRUST  COMPANY OF NEW YORK (hereinafter called the "TRUSTEE").  The
Trust
consists of:  (1) such of the Bonds deposited in Trust and listed in  the
appropriate Schedule to the Indenture and any other obligations that  may
be  deposited in the Trust in exchange or substitution therefor by reason
of  replacement  of  failed  contracts or refunding  of  the  obligations
initially  deposited, in accordance with the Indenture, as may from  time
to  time  continue to be held as part of the Trust, (2) with  respect  to
Insured  Trusts,  contracts  or policies of insurance  purchased  by  the
Depositor  from  Municipal Bond Investors Assurance Corporation  and  (3)
such  cash  amounts  as  from time to time may be held  in  the  Interest
Account and the Principal Account maintained under the Indenture  in  the
manner described below.

     At  any  given  time this Certificate shall represent  a  fractional
undivided interest in the Trust, the numerator of which fraction shall be
the  number of full and fractional Units set forth on the face hereof and
the  denominator of which shall be the total number of Units of undivided
fractional interest of the Trust which are outstanding at such time.

                                   -2-
<PAGE>
     The Depositor hereby grants and conveys all of its rights, title and
interest  in  and to the Trust to the extent of the fractional  undivided
interest  represented hereby to the registered holder of this Certificate
subject  to  and in pursuance of the Indenture, all the terms, conditions
and  covenants of which are incorporated herein as if fully set forth  at
length.

     The  registered holder of the Units represented by this  Certificate
is entitled at any time upon tender of this Certificate to the Trustee at
its  corporate trust office in the City of New York, and upon payment  of
any tax or other governmental charges, to receive on the seventh calendar
day  following the day on which such tender is made, or, if such calendar
day  is  not  a  business day, on the first business day  prior  to  such
calendar  date,  an amount in cash equal to the value  of  the  Units  of
fractional undivided interest in the Trust evidenced by this Certificate,
upon  the  basis provided for in the Indenture.  The right of  redemption
may  be suspended and the date of payment may be postponed for any period
during  which  the New York Stock Exchange is closed or trading  on  that
Exchange  is restricted, for any period during which an emergency  exists
so  that  disposal of the obligations held in the Trust is not reasonably
practicable  or it is not reasonably practicable fairly to determine  the
value  of  such obligations, or for such other periods as the  Securities
and Exchange Commission may by order permit.

     Interest  received  by the Trustee as part of the  Trust  (including
interest accrued and unpaid prior to the day of deposit of any obligation
in  the  Trust  and  that part of the proceeds of the sale,  liquidation,
redemption  or  maturity of any such obligation  or  from  any  insurance
thereon which represents accrued interest but not accrued original  issue
discount,  if  any)  shall  be credited by the Trustee  to  the  Interest
Account.    The  fractional  undivided  interest  represented   by   this
Certificate in the balance in the Interest Account (after the  deductions
referred to below) shall be computed as of the date of the Indenture  and
paid  on such date.  The next computation shall be made as of the  "First
General  Record  Date"  as  defined in the Indenture  and  thereafter  in
accordance  with the plan of distribution shown above.  For Trusts  other
than Compound Interest Trusts, an amount in cash equal to said fractional
undivided  interest in the Interest Account shall be distributed  on  the
fifteenth  day of the month in which each such computation  is  made,  or
within  a  reasonable period of time thereafter, to or upon the order  of
the registered holder of the Units represented by this Certificate at the
close  of  business  on  the  first  day  of  the  month  in  which  such
distribution is made.

     All moneys (other than interest) received by the Trustee as part  of
the  Trust  (including original issue discount and amounts received  from
the sale, liquidation, redemption or maturity of any obligations held  in
the Trust or from any insurance thereon) shall be credited by the Trustee
to  a  separate  Principal  Account.  The fractional  undivided  interest
represented  by  this Certificate in the cash balance  in  the  Principal
Account (after the deductions referred to below) shall be computed as  of
the  applicable Record Dates as defined in the Indenture  in  each  year,
commencing with the first such date occurring subsequent to the  date  of
the  Indenture.   An  amount in cash equal to said  undivided  fractional

                                   -3-
<PAGE>
interest  in the Principal Account shall be distributed on the  fifteenth
day of the months in which the Record Dates occur, or within a reasonable
period  of time thereafter, to or upon the order of the registered holder
of  the Units represented by this Certificate at the close of business on
the  first  day  of the month in which such distribution  is  made.   The
Trustee  shall not be required to make a distribution from the  Principal
Account  unless  the cash balance on deposit therein available  for  such
distribution  shall  be sufficient to distribute at least  10  cents  per
Unit.

     Distributions from the Interest and Principal Accounts shall be made
by  mail at the post office address of the holder hereof appearing in the
registration books of the Trustee or otherwise as directed by the holder.

     From time to time deductions shall be made from the Interest Account
and  Principal  Account, as more fully set forth in  the  Indenture,  for
redemptions,  compensation  of  the  Trustee,  reimbursement  of  certain
expenses  incurred by or on behalf of the Trustee, certain legal expenses
and  payment of or the establishment of a reserve for, applicable  taxes,
if any.

     Within  a  reasonable period of time after the end of each  calendar
year  the  Trustee shall furnish to the registered holder  of  the  Units
represented  by this Certificate a statement setting forth,  among  other
things,  the  amounts received and deductions therefrom and  the  amounts
distributed  during  the preceding year in respect of  interest  on,  and
sales,  redemptions  or maturities of, and proceeds  from  insurance  on,
obligations held in the Trust.

     The  Units represented by this Certificate shall be transferable  by
the  registered  holder  hereof by presentation  and  surrender  of  this
Certificate  at  the  corporate  trust office  of  the  Trustee  properly
endorsed on the reverse hereof or accompanied by a written instrument  or
instruments of transfer in form satisfactory to the Trustee and  executed
by the registered holder hereof or his authorized attorney.  Certificates
are interchangeable for (i) one or more Certificates or (ii) a Book Entry
Position, in each case in an equal aggregate number of Units of undivided
interest in denominations of a single Unit of undivided interest  or  any
multiple  and  fraction  thereof, all  in  the  manner  provided  in  the
Indenture.

     The  holder  hereof  may be required to pay a charge  of  $2.00  per
Certificate issued in connection with the transfer or interchange of  the
Units  represented by this Certificate and any tax or other  governmental
charge  that  may be imposed in connection with the transfer, interchange
or other surrender of this Certificate.

     The  holder of the Units represented by this Certificate, by  virtue
of  the acceptance of this Certificate, assents to and shall be bound  by
the  terms of the Indenture, a copy of which is on file and available for
inspection  at  the  corporate trust office  of  the  Trustee,  to  which
reference is made for all the terms, conditions and covenants thereof.

     The  Trustee  may  deem  and treat the person  in  whose  name  this
Certificate is registered upon the books of the Trustee as the  owner  of
the  Units  represented  by this Certificate for  all  purposes  and  the
Trustee shall not be affected by any notice to the contrary.

                                   -4-
<PAGE>
     The  Trust  shall terminate upon the maturity, redemption,  sale  or
other disposition of the last bond held therein, PROVIDED, HOWEVER,  that
in  no  event shall the Trust continue beyond the date specified  in  the
Indenture.  The Indenture also provides that the Trust may be  terminated
at  any time by the written consent of One hundred per cent (100%) of the
Unitholders of the Trust and under certain circumstances which include  a
decrease in the value of the Trust to less than Twenty per cent (20%)  of
the  aggregate principal amount of bonds initially deposited in the Trust
or  a  redemption by the Depositor of Units not theretofore  sold  in  an
amount  aggregating more than Sixty per cent (60%) of the initial  number
of  Units thereby reducing the net worth of the Trust to less than  Forty
per  cent  (40%)  of  the aggregate principal amount of  bonds  initially
deposited  in  the Trust.  Upon any termination the Trustee  shall  fully
liquidate the bonds then held, if any, and distribute pro rata the  funds
then  held  in the Trust upon surrender of the Units, all in  the  manner
provided  in  the  Indenture.  No such distribution shall  be  made  with
respect  to  Units represented by a Certificate until surrender  of  such
Certificate.   Upon termination, the Trustee shall be  under  no  further
obligation with respect to the Trust, except to hold the funds  in  trust
without  interest until distribution as aforesaid and shall have no  duty
upon  any  such termination to communicate with the holder  hereof  other
than  by mail at the address of such holder appearing on the registration
books of the Trustee.

     This  Certificate shall not become valid or binding for any  purpose
until properly executed by the Trustee under the Indenture.

     IN  WITNESS WHEREOF, John Nuveen & Co. Incorporated has caused  this
Certificate to be executed in facsimile by its Chairman of the Board  and
United  States  Trust Company of New York, as Trustee,  has  caused  this
Certificate to be executed manually or in facsimile in its corporate name
by an authorized officer.

     Date:                            JOHN NUVEEN & CO. INCORPORATED,
                                      DEPOSITOR
                               
                               
                                    By_______________________________
                                         Chairman of the Board
                               
                               
                                    UNITED STATES TRUST COMPANY OF NEW
                                       YORK, TRUSTEE
                               
                               
                                    By_______________________________
                                          Authorized Officer

                                   -5-
<PAGE>
                           FORM OF ASSIGNMENT

     For  Value Received _________________________________ hereby  sells,
assigns   and   transfers   unto  _________________________   the   Units
represented  by  the  within  Certificate  and  does  hereby  irrevocably
constitute  and appoint _________________________ attorney,  to  transfer
the  Units  represented by the within Certificate on  the  books  of  the
Trustee, with full power of substitution in the premises.

     Date:
                               

STATEMENT  REGARDING DISTRIBUTIONS - TRUSTS OTHER THAN
COMPOUND  INTEREST
TRUSTS

     On  the  face  of  this  Certificate it  is  indicated  whether  the
registered  holder hereof has elected to receive distributions  from  the
Interest Account monthly, quarterly or semi-annually.

     This  Certificate  by  its terms provides that  (after  the  initial
computation and payment on the date of the Indenture) distributions  from
the  Interest  Account shall be computed as of the First  General  Record
Date,  and thereafter in accordance with the plan of distribution chosen,
and  an  amount  in  cash  equal to the share  of  the  Interest  Account
represented by this Certificate distributed on the fifteenth day of  each
month in which such computation is made, or within a reasonable period of
time  thereafter, to or upon the order of the registered holder  of  this
Certificate  at the close of business on the first day of  the  month  in
which the distribution is made.

     All  Unitholders  of  record  on  the  First  General  Record  Date,
regardless of the plan of distribution selected, will receive  the  first
distribution  to  be  made  and thereafter  distributions  will  be  made
monthly,  quarterly  or  semi-annually,  depending  upon  the   plan   of
distribution chosen by the holder hereof.

     If   monthly   distributions  have  been  selected,  the  fractional
undivided interest represented by this Certificate in the balance in  the
Interest  Account, after the first distribution and after the  deductions
referred to in the Certificate, will be computed as of the first  day  of
each  month  of each year, commencing with the first such day  after  the
First   General  Record  Date,  and  subsequent  to  the  date  of   this
Certificate,  and  an amount in cash as thus computed distributed  to  or
upon  the  order of the holder hereof at such date of computation  (which
also  is  the Record Date) on or shortly after the fifteenth day of  each
month.

     If  quarterly  distributions  have  been  selected,  the  fractional
undivided interest represented by this Certificate in the balance in  the
Interest  Account, after the first distribution and after the  deductions
referred  to  in the Certificate, will be computed quarterly  as  of  the
quarterly Record Dates in each year, commencing with the first  such  day
after  the First General Record Date and subsequent to the date  of  this

                                   -6-
<PAGE>
Certificate,  and  an amount in cash as thus computed distributed  to  or
upon  the  order of the holder hereof at such date of computation  (which
also  is  the Record Date) on or shortly after the fifteenth day of  each
month in which such computation is made.

     If  semi-annual  distributions have been  selected,  the  fractional
undivided interest represented by this Certificate in the balance in  the
Interest  Account, after the first distribution and after the  deductions
referred to in the Certificate will be computed semi-annually as  of  the
semi-annual Record Dates in each year, commencing with the first such day
after  the First General Record Date and subsequent to the date  of  this
Certificate,  and  an amount in cash as thus computed distributed  to  or
upon  the  order of the holder hereof at such date of computation  (which
also  is  the Record Date) on or shortly after the fifteenth day of  each
month in which such computation is made.

     The  plan of distribution chosen by the registered holder hereof may
be  changed by written notice to the Trustee, by surrender to the Trustee
of  this  Certificate.  A plan of distribution shall continue  in  effect
until  changed  as herein provided.  A change in a plan  of  distribution
will be effective as of the day following the semi-annual Record Date  if
made by such Record Date.

     In  the  event the amount on deposit in the Interest Account is  not
sufficient for the payment of the amount of interest to be distributed to
Unitholders  participating in a distribution, the Trustee  shall  advance
its  own  funds and cause to be deposited in and credited to the Interest
Account  such  amounts  as  may be required  to  permit  payment  of  the
distribution  to be made and shall be entitled to be reimbursed,  without
interest, out of interest received by the Fund subsequent to the date  of
such  advance  and  subject to the condition that any such  reimbursement
shall be made only under conditions which will not reduce the funds in or
available  for the Interest Account to an amount less than  required  for
the  next ensuing distribution of interest.  Distributions to Unitholders
who  are  participating in one of the optional plans for distribution  of
interest shall not be affected because of advancements by the Trustee for
the purpose of equalizing distributions to Unitholders participating in a
different plan.

     NOW,  THEREFORE, in consideration of the premises and of the  mutual
agreements  herein  contained, the Depositor and  the  Trustee  agree  as
follows:
                               
                               
                                ARTICLE I
                               
                               
                               DEFINITIONS

SECTION 1.01.   Whenever used in this Indenture the following  words  and
phrases,  unless the context clearly indicates otherwise, shall have  the
following meanings:

          (1)    "BONDS"  shall mean such of the Tax-exempt  Obligations,
     including, the delivery statements relating to contracts (which  may
     include  "when-issued  contracts"), if  any,  for  the  purchase  of
     certain  bonds and certified or bank check or checks  or  letter  of

                                   -7-
<PAGE>
     credit  or  letters of credit sufficient in amount and  availability
     required  for  such  purchase, deposited in  irrevocable  trust  and
     listed in the Schedules attached hereto, and any obligation received
     in  exchange  for an obligation originally so deposited pursuant  to
     the  terms thereof such that without exception every holder  of  the
     originally deposited obligation must exchange such obligation  at  a
     date  not determined by the holder for a new obligation of the  same
     maturity  and  bearing  the same interest  rate  as  the  originally
     deposited  obligation, and any obligation received  in  exchange  or
     substitution for such obligations pursuant to Sections 3.08 or  3.14
     hereof,  as may from time to time continue to be held as a  part  of
     the Trust Fund.

          (2)    "BOOK  ENTRY DEALER" shall mean those dealers  including
     banks,  trust  companies  and other investment  advisers  for  whose
     customers   the   Depositor  executes  and  confirms   trades,   and
     broker/dealers  that  clear trades in Units through  the  Depositor,
     through  whom purchasers of Units will automatically be  book  entry
     Unitholders.

          (3)   "BOOK ENTRY POSITION" shall mean any position in Units of
     a  Trust  which  ownership is recorded on the books of  the  Trustee
     which  notation  evidences  ownership  of  an  undivided  fractional
     Interest in a Trust in book entry form.

          (4)    "BOOK ENTRY POSITION CONFIRMATION" shall mean the notice
     sent  out  by the Depositor to a purchaser of Units through  a  Book
     Entry Dealer, or a Unitholder who converts certificated Units  to  a
     Book Entry Position which confirms such purchase or conversion.

          (5)    "BOOK ENTRY UNITHOLDER" shall mean the registered holder
     of  any Book Entry Position as recorded on the books of the Trustee,
     his  legal  representatives  and heirs and  the  successors  of  any
     corporation, partnership or other legal entity which is a registered
     holder  of  any Book Entry Position and as such shall  be  deemed  a
     beneficiary  of the related Trust created by this Indenture  to  the
     extent of his pro rata share thereof.

          (6)   "BUSINESS DAY" shall mean any day other than a Sunday or,
     in  the  City of New York, a legal holiday or a day on which banking
     institutions are authorized by law to close.

          (7)    "CERTIFICATE"  shall mean any one  of  the  certificates
     executed by the Trustee and the Depositor evidencing ownership of an
     undivided fractional interest in a Trust.

          (8)  "CERTIFICATED UNITHOLDER" shall mean the registered holder
     of  any  Certificate, his legal representatives and  heirs  and  the
     successors  of  any corporation, partnership or other  legal  entity
     which is a registered holder of any Certificate and as such shall be
     deemed  a beneficiary of the related Trust created by this Indenture
     to the extent of his pro rata share thereof.

                                   -8-
<PAGE>
          (9)   "DEPOSITOR" shall mean John Nuveen & Co. Incorporated and
     its   successors  in  interest,  or  any  successor   depositor   as
     hereinafter provided for.

         (10)    "ELIGIBLE BOOK ENTRY UNITHOLDER" shall have the  meaning
     ascribed to such term in Section 4.02 of this Indenture.

         (11)   "INDENTURE" shall mean this Trust Indenture and Agreement
     as originally executed or, if amended as hereinafter provided, as so
     amended.

         (12)  "INSURANCE" shall mean the contract or contracts or policy
     or  policies of insurance guaranteeing the payment when due  of  the
     principal  of and interest on the Bonds (except Bonds held  pursuant
     and  subject  to  this  Indenture which are  insured  by  individual
     policies  of  insurance  issued  by  the  Municipal  Bond  Insurance
     Association  ("MBIA")  or  the Municipal  Bond  Investors  Assurance
     Corporation  (the  "CORPORATION") which have been  obtained  by  the
     issuers  or  underwriters of such Bonds (the  "PRE-INSURED  BONDS"))
     held  pursuant  and  subject to this Indenture,  together  with  the
     proceeds, if any, thereof payable to or received by the Trustee  for
     the  benefit  of  each Insured Trust in the Fund and the  respective
     Unitholders thereof.

          (13)  "INSURED TRUST" shall mean any separate trust created  by
     this  Indenture, each Bond contained in the portfolio  of  which  is
     either a Pre-Insured Bond or guaranteed by insurance obtained by the
     Depositor from the Insurer.

          (14)    "INSURER"  shall  mean  the  Municipal  Bond  Investors
     Assurance  Corporation  (the  "CORPORATION"),  its  successors   and
     assigns,  having its headquarters in Armonk, New York,  and  issuing
     the  contracts or policies of insurance protecting the owners of the
     Bonds  against  nonpayment  when due of the  principal  thereof  and
     interest thereon (except for Pre-Insured Bonds).

          (15)  "NEW BONDS" shall have the meaning ascribed to such  term
     in Section 3.14 of this Indenture.

          (16)   "SPECIAL BONDS" shall have the meaning ascribed to  such
     term in Section 3.14 of this Indenture.

         (17)  "STRIPPED OBLIGATION" shall mean a certificate, receipt or
     other  evidence  of ownership with respect to either  the  principal
     amount  of  or  an installment of interest payable on  a  Tax-exempt
     Obligation.

         (18)    "TAX-EXEMPT  OBLIGATION" shall include  interest-bearing
     obligations,  Zero Coupon Obligations and Stripped Obligations,  the
     interest  income and/or accrued original issue discount on which  is
     not  includible in the determination of gross income  under  federal
     income tax law.

                                   -9-
<PAGE>
         (19)   "TELEPHONE REDEMPTION AUTHORIZATION FORM" shall mean 
any
     form  approved  by  the  Trustee for use by Book  Entry  Unitholders
     redeeming 1,000 Units or less.

         (20)   "TRADITIONAL TRUST" shall mean any Trust which is not  an
     Insured Trust.

         (21)    "TRUST"  or  "TRUSTS" shall mean the separate  trust  or
     trusts  created  by  this  Indenture,  the  Bonds  constituting  the
     portfolios  of  which are listed in the various  separate  Schedules
     attached hereto.

         (22)    "TRUSTEE" shall mean United States Trust Company of  New
     York, or any successor trustee as hereinafter provided for.

         (23)   "TRUST FUND" shall mean the collective Trusts created  by
     this  Indenture, which shall consist of all the Bonds held  pursuant
     and  subject  to  this  Indenture together  with  all  undistributed
     interest  received  or accrued thereon, and any  undistributed  cash
     realized from the sale, redemption, liquidation, or maturity thereof
     or  the  proceeds  of insurance received in respect  thereof.   Such
     amounts  as  may  be  on deposit in the Reserve Account  hereinafter
     established shall be excluded from the Trust Fund.

         (24)    "UNIT" in respect of any Trust shall mean the fractional
     undivided  interest  in and ownership of the  Trust  equal  to  that
     fraction  of the respective Trust such that 1 shall be the numerator
     and  the number of Units as indicated in Item 4 of Schedule A hereto
     shall  be  the  denominator,  said denominator  of  which  shall  be
     decreased  by the number of any such Units redeemed as  provided  in
     Section 4.02.

         (25)   "UNITHOLDER" shall mean any Book Entry Unitholder or  any
     Certificated Unitholder.

         (26)   "ZERO COUPON OBLIGATION" shall mean a bond which does not
     provide for the payment of any current interest.

         (27)    Words importing singular number shall include the plural
     number in each case and vice versa, and words importing person shall
     include corporations and associations, as well as natural persons.

         (28)    The  words  "HEREIN",  "HEREBY",  "HEREWITH",  "HEREOF",
     "HEREINAFTER", "HEREUNDER", "HEREINABOVE", "HEREAFTER",
"HERETOFORE"
     and  similar  words  or phrases of reference and  association  shall
     refer to this Indenture in its entirety.

                                   -10-
<PAGE>

                            ARTICLE II
        DEPOSIT OF BONDS; ACCEPTANCE OF TRUST; FORM AND ISSUANCE
              OF CERTIFICATES; INSURED TRUST BOND INSURANCE

SECTION 2.01.   DEPOSIT OF BONDS:  The Depositor, concurrently  with  the
execution  and delivery hereof, has deposited with the Trustee  in  trust
the Bonds listed in the Schedules attached to this Indenture (or delivery
statements relating to contracts for the purchase thereof) in bearer form
or  duly endorsed in blank or accompanied by all necessary instruments of
assignment and transfer in proper form to be held, managed and applied by
the Trustee as herein provided.  If the seller in any contract to buy any
such  Bonds  fails to perform for any reason beyond the  control  of  the
Depositor  and the Depositor does not obtain these Bonds from  any  other
source,  the  Depositor  shall  forthwith give  the  Trustee  the  Failed
Contract  Notice  as defined in Section 3.14 and may  take  the  remedial
action specified in said Section 3.14.

SECTION 2.02.    ACCEPTANCE  OF TRUST:  The Trustee  hereby  accepts  the
trust  herein created for the use and benefit of the Unitholders  in  the
Trusts, subject to the terms and conditions of this Indenture.

SECTION 2.03.    ISSUE OF CERTIFICATES AND ESTABLISHMENT  OF  BOOK 
ENTRY
POSITIONS:   The  Trustee  hereby acknowledges  receipt  of  the  deposit
referred to in Section 2.01, and simultaneously with the receipt of  said
deposit,  will register on the transfer books of the Trust, for  each  of
the  monthly,  quarterly  and  semi-annual  plans  of  distribution,  the
Depositor's  ownership of all Units of each Trust.  The Trustee  may  not
transfer  such  Units  to  a holder other than the  Depositor  until  the
Trustee receives evidence satisfactory to it of the registration  of  the
Units under the Securities Act of 1933.

     Upon  the  sale of Units to a purchaser, the Units will be evidenced
by  a  Book Entry Position unless such purchaser expressly requests  that
the  purchased Units be evidenced in Certificate form.  Upon sale of  the
Units to a purchaser who requests Units in certificated form, the Trustee
shall  issue  a Certificate or Certificates in the name of the  purchaser
and  note that such Unitholder is a Certificated Unitholder on the  books
of the Trustee.

SECTION 2.04.    SEPARATE TRUSTS:  The Trusts created by  this  Indenture
are  separate and distinct trusts for all purposes and the assets of  one
trust  may  not be commingled with the assets of any other nor shall  the
expenses  of  any  trust be charged against the other.  The  Certificates
and/or  Book  Entry  Positions representing the  ownership  of  Units  of
undivided fractional interest in one Trust shall not be exchangeable  for
certificates or book entry positions representing ownership of  Units  of
undivided fractional interest in any other Trust.

                                   -11-
<PAGE>
SECTION 2.05.    FORM OF CERTIFICATES:  Each Certificate referred  to  in
Section 2.03  is,  and each Certificate hereafter  issued  shall  be,  in
substantially  the  form  hereinabove  recited,  numbered  serially   for
identification, in fully registered form, transferable only on the  books
of  the  Trustee  as  herein provided, executed  either  manually  or  in
facsimile by an authorized officer of the Trustee and in facsimile by the
Chairman  of  the Board, President or one of the Vice Presidents  of  the
Depositor  and dated the date of execution and delivery by  the  Trustee.
In  case  any authorized officer of the Trustee or the Depositor who  has
signed  or whose facsimile signature has been placed upon any Certificate
shall  have  ceased  to be such officer before any  such  Certificate  is
issued,  it may be issued with the same effect as if he were such officer
at the date of issue.

SECTION 2.06.    INSURED  TRUST BOND INSURANCE:   Concurrently  with  the
delivery to the Trustee of the Bonds listed in the Schedules for  Insured
Trusts  attached  to  the Indenture, the Insurer  has  delivered  to  and
deposited with the Trustee, a Municipal Bond Insurance Policy or Policies
(the  "Insurance")  to  protect each Bond  and  the  Unitholders  of  the
respective Insured Trust in which such Bond is held against nonpayment of
principal and interest when due on any such Bond or Bonds (except for Pre-
Insured Bonds).

     The  Trustee shall take all action deemed necessary or advisable  in
connection with the Insurance to continue the Insurance in full force and
effect,  all  in  such manner as in its sole discretion shall  appear  to
result in the most protection and least expense to each Insured Trust.

     At  all  times  during  the  existence of  the  Insured  Trust,  the
Insurance  policies  shall provide for payment  by  the  Insurer  to  the
Trustee  of any amounts of principal and interest due, but not  paid,  by
the  issuer  of an insured Bond.  The Trustee shall promptly  notify  the
Insurer  of  any  nonpayment  or threatened nonpayment  of  principal  or
interest  and  the  Insurer shall in accordance with  the  terms  of  the
policies  make  payment to the Trustee of all amounts  of  principal  and
interest at that time due, but not paid.

     Upon  the  making  of  any  payment referred  to  in  the  preceding
paragraphs, the Insurer shall succeed to the rights of the Trustee  under
the  Bond  or  Bonds  involved  to  the  extent  of  the  payments  made.
Concurrently with the payment of any amounts by the Insurer occasioned by
the  nonpayment of principal and/or interest by the issuer,  the  Trustee
shall  execute  and  deliver to the Insurer any  receipt,  instrument  or
document  required  to evidence the right of the Insurer  to  payment  of
principal and/or interest under the Bond or Bonds involved to the  extent
of the payments made by the Insurer to the Trustee.

     The  Trustee shall promptly notify the Corporation of any nonpayment
of  principal  of or interest on any Bonds and if the Corporation  should
fail  to make payment to the Trustee within 30 days after receipt of such
notice, the Trustee shall take all action against the Corporation  and/or
the  issuer  deemed  necessary to collect all amounts  of  principal  and
interest at that time due, but not collected.

                                   -12-
<PAGE>
                               ARTICLE III

                         ADMINISTRATION OF FUND

SECTION 3.01.    INITIAL  COST:   The cost of  the  initial  preparation,
printing  and  execution  of the Certificates  and  this  Indenture,  the
initial  fees  of  the  Trustee  and  the  Trustee's  counsel  and  other
reasonable  expenses  in  connection therewith,  shall  be  paid  by  the
Depositor,  PROVIDED, HOWEVER, that the liability  on  the  part  of  the
Depositor for such initial costs, fees and expenses shall not include any
fees,  costs or other expenses incurred in connection herewith after  the
execution of this Indenture and the deposit referred to in Section 2.01.

SECTION 3.02.   INTEREST ACCOUNT:  The Trustee shall collect the interest
on  the  Bonds  in  each  Trust as such becomes  payable  (including  all
interest accrued but unpaid prior to the date of deposit of the Bonds  in
trust  and  including that part of the proceeds of the sale, liquidation,
redemption or maturity of any Bonds or insurance thereon which represents
accrued interest thereon but not accrued original issue discount, if any)
and credit such interest to a separate account for each Trust to be known
as  the "Interest Account".  For purposes of this Indenture, interest  to
be  credited  to  the  Interest Account shall not be  deemed  to  include
original issue discount accrued or paid or any amounts accrued or paid in
respect of Stripped Obligations.

SECTION 3.03.    PRINCIPAL ACCOUNT:  The Bonds  in  each  Trust  and  all
moneys  (including moneys delivered to the Trustee for  the  purchase  of
bonds pursuant to contracts, which moneys are no longer required for such
purchase and all amounts received with respect to Zero Coupon Obligations
and  Stripped  Obligations) other than amounts credited to  the  Interest
Account,  received by the Trustee in respect of the Bonds in each  Trust,
including insurance thereon, shall be credited to a separate account  for
each  Trust  to  be known as the "Principal Account."  Moneys  which  are
required to cover contracts to purchase bonds are hereby declared  to  be
held  in trust by the Trustee for such purchase until the Depositor shall
have  notified  the Trustee that such contracts, and if  applicable,  any
contracts  for  New Bonds as permitted by Section 3.14, have  failed  and
shall have directed the Trustee to distribute such moneys as provided  in
Section 3.05.  For this purpose if the Depositor shall deposit New  Bonds
in  a  principal amount less than the principal amount of Special  Bonds,
such  event shall be treated as a failure as to the principal  amount  of
Special Bonds not replaced by an equal principal amount of New Bonds.

SECTION 3.04.    RESERVE ACCOUNT:  From time to time  the  Trustee  shall
withdraw  from  the  cash  on  deposit in the  Interest  Account  or  the
Principal  Account of the appropriate Trust such amounts as  it,  in  its
sole  discretion,  shall deem requisite to establish a  reserve  for  any
applicable taxes or other governmental charges that may be payable out of
such  Trust.  Such amounts so withdrawn shall be credited to  a  separate
account  for  each  Trust which shall be known  as the "Reserve  Account.
The Trustee shall not be required to distribute to the Unitholders any of
the  amounts in the Reserve Account; PROVIDED, HOWEVER, that if it shall,
in  its  sole  discretion,  determine that such  amounts  are  no  longer
necessary  for  payment  of any applicable taxes  or  other  governmental
charges,  then it shall promptly deposit such amounts in the  appropriate
account.

                                   -13-
<PAGE>
SECTION 3.05.    DISTRIBUTIONS:  For Trusts other than Compound  Interest
Trusts,  the  Trustee, as of the date indicated in Item 2  of  Schedule A
hereto, shall advance from its own funds and shall pay to the Unitholders
of the respective Trusts then of record the amount of interest accrued on
the  Bonds  deposited  in the respective Trusts.  The  Trustee  shall  be
entitled  to  reimbursement, without interest, for such advancement  from
interest   received   by  the  respective  Trusts  before   any   further
distributions  shall be made from the Interest Account to Unitholders  of
the  respective  Trusts.   Subsequent  distributions  shall  be  made  as
hereinafter  provided.  For  Trusts other than Compound Interest  Trusts,
the  second  distribution  of funds from the  Interest  Accounts  of  the
respective  Trusts shall be in the amounts as indicated in  Item 5(a)  of
Schedule A hereto and shall be made on the date as indicated in Item 5(b)
of  said Schedule A to or upon the order of all Unitholders of record  of
the  respective Trusts as of the dates as indicated in Item 5(c) of  said
Schedule A.   For all subsequent semi-annual distributions to Unitholders
of  any Trust (other than Compound Interest Trusts), the "Record Date" is
hereby  fixed to be the first day of the months of each year as indicated
in Item 6 of said Schedule A.

     As  of the first day of each month of each year commencing with  the
dates  as  indicated in Item 10 of Schedule A hereto, the  Trustee  shall
with respect to each Trust:

          (a)    deduct from the Interest Account or, to the extent funds
     are  not  available in such Account, from the Principal Account  and
     pay  to  itself  individually the amounts that it  is  at  the  time
     entitled to receive pursuant to Section 5.04;

          (b)   deduct from the Interest Account, or, to the extent funds
     are  not  available in such Account, from the Principal Account  and
     pay  to the Depositor the amount that it is at the time entitled  to
     receive pursuant to Section 4.05; and

          (c)   deduct from the Interest Account, or, to the extent funds
     are  not  available in such Account, from the Principal Account  and
     pay to bond counsel, as hereinafter provided for, an amount equal to
     unpaid  fees and expenses, if any, of such bond counsel as certified
     to by the Depositor.

     For  Trusts other than Compound Interest Trusts, on or shortly after
the  15th  day  of  each  of  the months as  indicated  in  Item 6(a)  of
Schedule A hereto (the "SEMI-ANNUAL DISTRIBUTION DATE") commencing on
the
date  as  indicated in Item 5(b) of said Schedule A, the  Trustee  shall,
with  respect  to any Trust, distribute by mail to or upon the  order  of
each  Unitholder of record of such trust as of the close of  business  on
the  preceding  Record Date at the post office address appearing  on  the
registration books of the Trustee such Unitholder's pro rata share of the
balance of the Interest Account of such Trust calculated as of the Record
Date  for  such  Semi-Annual payment on the  basis  of  one-half  of  the
estimated  annual  interest income to such Trust for the  ensuing  twelve
months, after deduction of the estimated costs and expenses of such Trust
to  be  incurred  during the twelve month period for which  the  interest
income has been estimated.

     For  Trusts  other than Compound Interest Trusts, in the  event  the
amount  on  deposit in the Interest Account of any Trust on a Semi-Annual

                                   -14-
<PAGE>
Distribution  Date is not sufficient for the payment  of  the  amount  of
interest to be distributed on the basis of the aforesaid computation, the
Trustee  shall advance out of its own funds and cause to be deposited  in
and  credited to such Interest Account such amount as may be required  to
permit  payment of the semi-annual interest distribution to  be  made  on
such   Semi-Annual  Distribution  Date  and  shall  be  entitled  to   be
reimbursed,  without  interest, out of interest received  by  such  Trust
subsequent to the date of such advance and subject to the condition  that
any such reimbursement shall be made only under conditions which will not
reduce  the funds in or available for the Interest Account to  an  amount
less  than  required for the next ensuing distribution of interest.   The
Trustee's fee takes into account the costs attributable to the outlay  of
capital needed to make such advances.

     In lieu of the semi-annual distributions of interest provided above,
a  Unitholder  of  any Trust (other than a Compound Interest  Trust)  may
elect to receive payments from the Interest Account of such Trust monthly
or  quarterly.   The second distribution hereinbefore PROVIDED,  HOWEVER,
shall  be made to or upon the order of all holders of Units of such Trust
(other  than  a  Compound  Interest Trust) who  have  chosen  to  receive
subsequent distributions on a different basis.

     Unitholders  of  any  Trust (other than a Compound  Interest  Trust)
desiring  to receive monthly or quarterly distributions and who  purchase
their  Certificates prior to the Record Date for the second  distribution
may  elect at the time of purchase to receive distributions on a  monthly
or  quarterly  basis by notice to the Trustee.  Unitholders must  furnish
written  notice to the Trustee indicating their desire to receive monthly
or  quarterly distributions.  The Trustee, within five business  days  of
receiving  such  notice, shall issue to the Book Entry Unitholder  a  new
Book  Entry Position Confirmation indicating such Unitholder's  preferred
distribution  plan.   Such  notice shall be  effective  with  respect  to
subsequent distributions until changed by further notice to the  Trustee.
Those  wishing to change their plan of distribution must do so by sending
written notice at any time to the Trustee; Certificated Unitholders  must
also  send  to the Trustee the Certificate to which the requested  change
relates.   Changes may be made only as herein provided  and  will  become
effective as of the following May 2 if received by May 1 of such year, or
as  of  November  2  if  received by November 1 of  such  year  and  such
distributions will continue until further notice.

     For  monthly distributions the share of the balance in the  Interest
Account  to  be distributed to or upon the order of a Unitholder  of  any
Trust  (other than a Compound Interest Trust) who has elected to  receive
monthly  distributions, after the second distribution, shall be  computed
as  of  the  first day of each month commencing with the first  such  day
subsequent to the date of the Certificate or to the date of the recording
of  the  Book Entry Position on the books of the Trustee and distribution
made as provided herein on or shortly after the 15th day of the month  of
computation  to  the  Unitholder of record on such date  of  computation.
Such  computation  shall  be  made on the basis  of  one-twelfth  of  the
estimated  annual interest income to the related Trust  for  the  ensuing
twelve  months for the account of Unitholders of any Trust (other than  a
Compound   Interest   Trust)  who  have  elected   to   receive   monthly
distributions, after deduction of the estimated costs and expenses to  be
incurred on behalf of such Unitholders during the twelve month period for
which such interest income has been estimated.

                                   -15-
<PAGE>
     For quarterly distributions the share of the balance in the Interest
Account  to  be distributed to or upon the order of a Unitholder  of  any
Trust  (other than a Compound Interest Trust) who has elected to  receive
quarterly distributions, after the second distribution, shall be computed
as  of  the  first day of each of the months as indicated  in  Item 9  of
Schedule A hereto, commencing with the first such day subsequent  to  the
date of the Certificate or to the date of the recording of the Book Entry
Position  on  the books of the Trustee and distribution made as  provided
herein  on  or shortly after the 15th day of the month of computation  to
the  Unitholder of record on such date of computation.  Such  computation
shall be made on the basis of one-fourth of the estimated annual interest
income to the related Trust for the ensuing twelve months for the account
of  Unitholders of any Trust (other than a Compound Interest  Trust)  who
have  elected to receive quarterly distributions, after deduction of  the
estimated costs and expenses to be incurred on behalf of such Unitholders
during  the twelve month period for which such interest income  has  been
estimated.

     To  the  extent practicable, the Trustee shall allocate the expenses
of each Trust among Units of such Trust within any Trust and with respect
to  Trusts other than Compound Interest Trusts, giving effect within  any
Trust  to differences in administrative and operational cost among  those
who  have  chosen  to receive distributions monthly, quarterly  or  semi-
annually.

     If  the Trustee determines that an event has occurred as a result of
which  there  has  resulted an excessive distribution from  the  Interest
Account, it shall reduce subsequent distributions so as to reconcile,  as
promptly as practicable, the aggregate net income and distributions  from
such Account.

     For  Trusts  other than Compound Interest Trusts, in the  event  the
amount  on  deposit in the Interest Account of a Trust for a  monthly  or
quarterly distribution is not sufficient for the payment of the amount of
interest  to  be  distributed  to  Unitholders  participating   in   such
distributions  on  the basis of the aforesaid computations,  the  Trustee
shall advance its own funds and cause to be deposited in and credited  to
such  Interest Account such amounts as may be required to permit  payment
of the monthly or quarterly interest distribution to be made as aforesaid
and shall be entitled to be reimbursed, without interest, out of interest
received by such Trust subsequent to the date of such advance and subject
to  the  condition that any such reimbursement shall be made  only  under
conditions  which  will  not reduce the funds in or  available  for  such
Interest  Account  to an amount less than required for the  next  ensuing
distribution of interest.  The Trustee's fee takes into account the costs
attributable  to  the  outlay of capital needed to  make  such  advances.
Distributions to Unitholders of any Trust who are participating in one of
the  optional  plans for distribution of interest shall not  be  affected
because  of  advancements by the Trustee for the  purpose  of  equalizing
distributions  to Unitholders of any Trust participating in  a  different
plan.

     With  respect to Compound Interest Trusts, the share of the  balance
in  the  Interest Account to be distributed to or upon  the  order  of  a
Unitholder,  shall  be  computed  as of  the  first  day  of  each  month
commencing  with  the  first  such day subsequent  to  the  date  of  the

                                   -16-
<PAGE>
Certificate or to the date of the recording of the Book Entry Position on
the  books of the Trustee and distribution made as provided herein on  or
shortly  after the 15th day of the month of computation to the Unitholder
of  record on such date of computation.  Distributions from the  Interest
Account  to  Unitholders will only be made if the  amount  available  for
distribution shall amount to at least $1.00 per Unit.  In the  event  the
net  amount  after  deduction  of the reasonably  anticipated  costs  and
expenses to be incurred during the ensuing six-month period from the date
of  computation available for distribution in the Interest Account equals
at  least $1.00 per Unit, such amount shall be distributed to Unitholders
as provided above.

     For  Trusts  other  than Compound Interest Trusts, distributions  of
amounts represented by the cash balance in the Principal Account for each
Trust  shall  be  computed as of the date as indicated  in  Item 7(b)  of
Schedule A  hereto, and thereafter as of the first day of the  months  of
each year as indicated in Item 7(a) of said Schedule A.  With respect  to
Compound  Interest  Trusts, distributions of amounts represented  by  the
cash balance in the Principal Account for such Trust shall be computed as
of  the first day of each month.  On the fifteenth day of each month,  in
which  such  computation is made, or within a reasonable period  of  time
thereafter, the Trustee shall distribute by mail to or upon the order  of
each  Unitholder  of  record at the close of  business  on  the  date  of
computation  (the Record Date) at his post office address  such  holder's
pro  rata  share  of the cash balance of such Principal Account  as  thus
computed.  The Trustee shall not be required to make a distribution  from
such  Principal  Account  unless  the cash  balance  on  deposit  therein
available for distribution shall be sufficient to distribute at least  10
cents per Unit.

     Notwithstanding the foregoing, if the Depositor fails to replace any
Special  Bond  (as defined in Section 3.14) in a Trust by  delivering  an
equal  principal  amount  of  New Bonds  to  the  Trustee  prior  to  the
expiration of the Purchase Period as defined in Section 3.14, the Trustee
shall distribute to all Unitholders of Units in the respective Trust  the
entire  amount  of  principal and accrued interest attributable  to  such
Special  Bonds  which  have  not been so replaced  at  the  next  monthly
distribution date which is more than thirty days after the expiration  of
the  Purchase Period or at such earlier time as the Trustee in  its  sole
discretion deems to be in the best interest of the Unitholders.

     The  Trustee may, in its discretion, adjust the amount of subsequent
distributions  from  the  Trust  to take account  of  any  difference  in
interest  accrued  on  the New Bond at the time of its  deposit  and  the
interest which would have accrued on the Special Bond as of such date.

     The amounts to be so distributed to each Unitholder of a Trust shall
be  that pro rata share of the cash balance of the Interest and Principal
Accounts  of  such  Trust,  computed as set  forth  above,  as  shall  be
represented  by  the  Units evidenced by the outstanding  Certificate  or
Certificates registered in the name of such Unitholders and/or Book Entry
Positions recorded in the names of such Unitholders on the books  of  the
Trustee.

     In  the  computation of each such share, fractions of less than  one
cent  shall be omitted.  After any such distribution provided for  above,
any  cash  balance  remaining in the Interest Account  or  the  Principal
Account  of  a  Trust shall be held in the same manner as  other  amounts
subsequently deposited in each of such Accounts, respectively.

                                   -17-
<PAGE>
     For  the purpose of distribution as herein provided, the holders  of
record  on the registration books of the Trustee at the close of business
on  each Record Date shall be conclusively entitled to such distribution,
and  no liability shall attach to the Trustee by reason of payment to  or
upon  the  order  of any such registered Unitholder of  record.   Nothing
herein  shall  be  construed to prevent the payment of amounts  from  the
Interest  Account  and  the Principal Account of a  Trust  to  individual
Unitholders  by  means  of one check, draft or other  proper  instrument,
provided  that  the appropriate statement of such distribution  shall  be
furnished therewith as provided in Section 3.06 hereof (unless waived  as
set forth in said Section 3.06).

SECTION 3.06.   DISTRIBUTION STATEMENTS:  With each distribution from the
Interest  or Principal Accounts of a Trust the Trustee shall  set  forth,
either  in  the instrument by means of which payment of such distribution
is  made  or  in an accompanying statement, the amount being  distributed
from  each  such account expressed as a dollar amount per  Unit  of  such
Trust  except that such information need not be furnished to a Unitholder
who has waived receipt thereof in writing.   In the event that the issuer
or insurer of any of the Bonds in a Trust shall fail to make payment when
due of any interest or principal and such failure results in a change  in
the   amount   which  would  otherwise  be  distributed  as   a   monthly
distribution, the Trustee shall, with the first distribution relating  to
such Trust following such failure, set forth in an accompanying statement
(a)  the name of the issuer and the Bond, (b) the amount of the reduction
in  the  distribution  per  unit resulting from  such  failure,  (c)  the
percentage  of  the aggregate principal amount of Bonds which  such  Bond
represents  and (d) to the extent then determined, information  regarding
any disposition or legal action with respect to such Bond.

     Within  a reasonable period of time after the last business  day  of
each  calendar year, the Trustee shall furnish to each person who at  any
time  during  such calendar year was a Unitholder of a Trust a  statement
setting  forth,  with respect to such calendar year and with  respect  to
such Trust:

         (A)   as to the Interest Account:

               (1)   the amount of interest received on the Bonds,

               (2)   the amounts paid for purchases of New Bonds pursuant
          to Section 3.14 and for redemptions pursuant to Section 4.02,

               (3)    the  deductions for applicable taxes and  fees  and
          expenses of the Trustee and bond counsel, and

               (4)    the balance remaining after such distributions  and
          deductions, expressed both as a total dollar amount  and  as  a
          dollar amount per Unit outstanding on the last business day  of
          such calendar year;

         (B)   as to the Principal Account:

                                   -18-
<PAGE>
               (1)    the  dates  of the sale, maturity,  liquidation  or
          redemption  of  any of the Bonds and the net proceeds  received
          therefrom  excluding  any  portion  thereof  credited  to   the
          Interest Account,

               (2)    the  amounts received with respect to  Zero  Coupon
          Obligations  and  Stripped  Obligations  which,  based  on  the
          Evaluator's  price therefor on the Date of Deposit,  constitute
          tax-exempt   original  issue  discount  to  a  Unitholder   who
          purchased his Units on the Day of Deposit,

               (3)    the amount paid for purchases of New Bonds pursuant
          to Section 3.14 and for redemptions pursuant to Section 4.02,

               (4)    the deductions for payment of applicable taxes  and
          fees and expenses of the Trustee and bond counsel, and

               (5)    the balance remaining after such distributions  and
          deductions, expressed both as a total dollar amount  and  as  a
          dollar amount per Unit outstanding on the last business day  of
          such calendar year; and

         (C)   the following information:

               (1)    a list of the Bonds as of the last business day  of
          such calendar year,

               (2)   the number of Units outstanding on the last business
          day of such calendar year,

               (3)    the Unit Value based on the last evaluation of such
          Trust made during such calendar year,

              (4)   the amounts actually distributed during such calendar
          year  from  the  Interest  and Principal  Accounts,  separately
          stated,  expressed both as total dollar amounts and  as  dollar
          amounts  per  Unit  outstanding on the record  dates  for  such
          distributions, and

               (5)    for  Compound Interest Trusts only, the  amount  of
          original issue discount earned on portfolio Bonds, based on the
          valuation of such Bonds on the Date of Deposit.

SECTION 3.07.    SALE OF BONDS:  If necessary, in order to  maintain  the
sound  investment  character of a Trust, the  Depositor  may  direct  the
Trustee  to sell or liquidate Bonds in such Trust at such price and  time
and in such manner as shall be determined by the Depositor, provided that
the  Depositor  has  determined  that  any  one or more of the  following
conditions exist:

         (a)   that there has been a default on such Bonds in the payment
     of principal or interest, or both, when due and payable;
                                   -19-
<PAGE>
          (b)   that any action or proceeding has been instituted in  law
     or  equity seeking to restrain or enjoin the payment of principal or
     interest on any such Bonds, attacking the constitutionality  of  any
     enabling  legislation  or alleging and seeking  to  have  judicially
     determined the illegality of the issuing body or the constitution of
     its  governing  body  or officers, the illegality,  irregularity  or
     omission  of  any necessary acts or proceedings preliminary  to  the
     issuance  of  such  Bonds,  or seeking to  restrain  or  enjoin  the
     performance by the officers or employees of any such issuing body of
     any improper or illegal act in connection with the administration of
     funds necessary for debt service on such Bonds or otherwise; or that
     there  exists any other legal question or impediment affecting  such
     Bonds or the payment of debt service on the same;

         (c)   that there has occurred any breach of covenant or warranty
     in  any  resolution, ordinance, trust indenture or  other  document,
     which would adversely affect either immediately or contingently  the
     payment  of  debt  service on such Bonds, or  their  general  credit
     standing, or otherwise impair the sound investment character of such
     Bonds;

          (d)   that there has been a default in the payment of principal
     of  or interest on any other outstanding obligations of an issuer of
     such Bonds;

         (e)   that in the case of revenue Bonds, the revenues and income
     of  the facility or project or other special funds expressly charged
     and   pledged  for  debt  service  on  any  such  Bonds  shall  fall
     substantially  below the estimated revenues or income calculated  by
     the   engineers   or  other  proper  officials  charged   with   the
     acquisition, construction or operation of such facility or  project,
     so  that,  in  the opinion of the Depositor, the retention  of  such
     Bonds would be detrimental to the sound investment character of such
     Trust and to the interest of the Unitholders thereof;

          (f)   that the price of any such Bonds has declined to such  an
     extent, or such other market or credit factor exists, so that in the
     opinion  of  the  Depositor the retention of  such  Bonds  would  be
     detrimental  to  such Trust and to the interest of  the  Unitholders
     thereof;

          (g)   that such Bonds are the subject of an advanced refunding.
     For  the  purposes of this Section 3.07(g), "an advanced  refunding"
     shall  mean when refunding bonds are issued and the proceeds thereof
     are  deposited  in  an  irrevocable trust  to retire the Bonds on or
     before their redemption date; or

          (h)   that as of any Record Date any of the Bonds are scheduled
     to  be  redeemed  and  paid  prior to the  next  succeeding  Monthly
     Distribution  Date; PROVIDED, HOWEVER, that as the  result  of  such
     redemption the Trustee will receive funds in an amount sufficient to
     enable the Trustee to include in the distribution from the Principal
     Account  on such next succeeding Monthly Distribution Date at  least
     $.50 per Unit.

                                   -20-
<PAGE>
     Upon  receipt of such direction from the Depositor, upon  which  the
Trustee  shall  rely, the Trustee shall proceed to sell or liquidate  the
specified  Bonds  in  accordance with such direction; PROVIDED,  HOWEVER,
that the Trustee shall not sell or liquidate any Bonds upon receipt of  a
direction  from the Depositor that it has determined that the  conditions
in  subdivision  (h)  above exist, unless the Trustee  shall  receive  on
account  of  such sale or liquidation the full principal amount  of  such
Bonds,  plus the premium, if any, and the interest accrued and to  accrue
thereon  to the date of the redemption of such Bonds.  The Trustee  shall
not be liable or responsible in any way for depreciation or loss incurred
by reason of any sale made pursuant to any such direction or by reason of
the  failure  of  the Depositor to give any such direction,  and  in  the
absence  of  such  direction the Trustee shall have no duty  to  sell  or
liquidate  any  Bonds  under  this  Section 3.07  except  to  the  extent
otherwise required by Section 3.10 of this Indenture.

SECTION 3.08.    REFUNDING BONDS:  In the event that an  offer  shall  be
made  by  an  obligor  of  any of the Bonds  in  a  Trust  to  issue  new
obligations in exchange and substitution for any issue of Bonds  pursuant
to  a  plan for the refunding or refinancing of such Bonds, the Depositor
shall instruct the Trustee in writing to reject such offer and either  to
hold or sell such Bonds, except that if (1) the issuer is in default with
respect  to such Bonds or (2) in the opinion of the Depositor,  given  in
writing to the Trustee, the issuer will probably default with respect  to
such  Bonds  in  the reasonably foreseeable future, the  Depositor  shall
instruct  the Trustee in writing to accept or reject such offer  or  take
any  other action with respect thereto as the Depositor may deem  proper.
Any  obligation so received in exchange shall be deposited hereunder  and
shall  be  subject to the terms and conditions of this Indenture  to  the
same  extent  as the Bonds originally deposited hereunder.   Within  five
days  after  such deposit, notice of such exchange and deposit  shall  be
given  by  the  Trustee to each Unitholder of such  Trust,  including  an
identification  of  the  Bonds  eliminated  and  the  bonds   substituted
therefor.

SECTION 3.09.   BOND COUNSEL:  The Depositor may employ from time to time
as it may deem necessary a firm of municipal bond attorneys for any legal
services  that  may  be required in connection with  the  disposition  of
underlying  bonds  pursuant to Section 3.07 or the  substitution  of  any
securities for underlying bonds as the result of any refunding  permitted
under Section 3.08.  The fees and expenses of such bond counsel shall  be
paid  by  the  Trustee from the Interest and Principal  Accounts  of  the
applicable Trust as provided for in Section 3.05(c) hereof.

SECTION 3.10.   NOTICE AND SALE BY TRUSTEE:  If at any time the principal
of  or  interest on any of the Bonds shall be in default and not paid  or
provision  for  payment  thereof shall not have been  duly  made,  either
pursuant to any Insurance thereon or otherwise, the Trustee shall  notify
the Depositor thereof.  If within thirty days after such notification the
Depositor  has not given any instruction to sell or to hold  or  has  not
taken  any other action in connection with such Bonds, the Trustee  shall
sell  such  Bonds  forthwith, and the Trustee  shall  not  be  liable  or
responsible  in any way for depreciation or loss incurred  by  reason  of
such sale.

                                   -21-
<PAGE>
SECTION 3.11.    TRUSTEE NOT TO AMORTIZE:  Nothing in this Indenture,  or
otherwise,  shall  be  construed  to require  the  Trustee  to  make  any
adjustments between the Interest and Principal Accounts of any  Trust  by
reason of any premium or discount in respect of any of the Bonds.

SECTION 3.12.   LIABILITY OF DEPOSITOR:  The Depositor shall be under  no
liability to the Unitholders for any action taken or for refraining  from
the  taking of any action in good faith pursuant to this Indenture or for
errors in judgment, but shall be liable only for its own negligence, lack
of good faith or willful misconduct. The Depositor may rely in good faith
on   any   paper,  order,  notice,  list,  affidavit,  receipt,  opinion,
endorsement,  assignment, draft or any other document of any  kind  prima
facie properly executed and submitted to it by the Trustee, bond counsel,
or any other persons pursuant to this Indenture and in furtherance of its
duties.

SECTION 3.13.   NOTICE TO DEPOSITOR:  In the event that the Trustee shall
have  been notified at any time of any action to be taken or proposed  to
be taken by holders of the Bonds (including but not limited to the making
of  any  demand,  direction, request, giving of any  notice,  consent  or
waiver  or the voting with respect to any amendment or supplement to  any
indenture, resolution, agreement or other instrument under or pursuant to
which  the Bonds have been issued) the Trustee shall promptly notify  the
Depositor and shall thereupon take such action or refrain from taking any
action as the Depositor shall in writing direct; PROVIDED, HOWEVER,  that
if  the  Depositor shall not within five business days of the  giving  of
such  notice to the Depositor direct the Trustee to take or refrain  from
taking any action, the Trustee shall take such action as it, in its  sole
discretion, shall deem advisable.  Neither the Depositor nor the  Trustee
shall  be  liable to any person for any action or failure to take  action
with respect to this Section 3.13.

SECTION 3.14.   LIMITED REPLACEMENT OF SPECIAL BONDS:  If any contract
in
respect  of Bonds in a Trust other than a contract to purchase New  Bonds
(as defined below), including those purchased on a when, as and if issued
basis,  shall have failed due to any occurrence, act or event beyond  the
control  of the Depositor or the Trustee (such failed Bonds being  herein
called the "Special Bonds"), the Depositor shall notify the Trustee (such
notice being herein called the "Failed Contract Notice") of its inability
to deliver the Special Bonds to the Trustee promptly after it is notified
that the Special Bonds will not be delivered to it by the seller thereof.
The  Depositor shall have until the earlier of twenty days  after  giving
the  Failed  Contract Notice or ninety days after the date  indicated  in
Item 2  of  Schedule A to this Indenture (such twenty-day  or  ninety-day
period  being  herein called the "Purchase Period")  to  deliver  to  the
Trustee  an  obligation to be held as Bonds hereunder (herein called  the
"New  Bonds") as part of such Trust in replacement of an equal  principal
amount  of  the  Special Bonds, subject to the satisfaction of all of the
following conditions in the case of any such new Bonds:

          (a)    The New Bonds (i) shall be tax-exempt obligations issued
     by  states, territories or their political subdivisions, (ii)  shall
     have  a fixed maturity date (whether or not entitled to the benefits
     of  any  sinking redemption, purchase or similar fund) not exceeding

                                   -22-
<PAGE>
     the  date of maturity of the Special Bonds they replace and not less
     than  approximately  1  year in the case  of  a  Short  Term  Trust,
     approximately  3  years in the case of a Short  Intermediate  Trust,
     approximately  5 years in the case of an Intermediate  Trust,  State
     Intermediate  Trust  or  Compound Interest Trust,  approximately  11
     years in the case of a Long Intermediate Trust and approximately  15
     years in the case of any other Trust, in each case after the date of
     purchase,   (iii) shall  be  acquired  by  the  Trust  at   a   cost
     ("ACQUISITION  COST")  equal  to  the  "Trustee's  Determination  of
     Offering  Price" of the respective Trust indicated in the  "Schedule
     of  Investments"  set  forth in the Prospectus  dated  the  Date  of
     Deposit  and  relating to the Series of the Nuveen  Tax-Exempt  Unit
     Trust  as  indicated  in  Item 1 of Schedule A  to  this  Indenture,
     attributable to the principal amount of Special Bonds they  replace,
     (iv)  must have a current return based on their Acquisition Cost  at
     least  equal to the current return as of the Date of Deposit of  the
     Special Bonds they replace, (v) must have a yield to maturity  based
     on their Acquisition Cost at least equal to the yield to maturity as
     of the Date of Deposit of the Special Bonds they replace, (vi) shall
     be  payable  as to principal and interest, if any, in United  States
     currency,  (vii) shall  not  be  when,  as  and  if  issued   Bonds,
     (viii) with  respect  to  a  State  Trust,  shall  have  benefit  of
     exemption from state taxation to an equal or greater extent than the
     Special Bonds they replace, (ix) with respect to a Compound Interest
     Trust,  shall  be  non-interest bearing  (unless  the  New  Bond  is
     replacing the current interest paying Special Bond or Special  Bonds
     to be used to pay expenses of such Trust) and (x) with respect to  a
     New  Bond  replacing  the current interest paying  Special  Bond  or
     Special  Bonds  to  be used to pay expenses of a  Compound  Interest
     Trust, such New Bond shall not be subject to redemption prior to its
     maturity.

          (b)    Each  New Bond shall be rated at least "A" or better  by
     Standard  & Poor's Corporation or "A" or better by Moody's Investors
     Service, Inc.

          (c)    The  principal  amount of the New  Bonds  (exclusive  of
     accrued  interest)  shall  not exceed the principal  amount  of  the
     Special Bonds.

          (d)    In the case of Insured Trusts, each New Bond shall be  a
     Pre-Insured Bond or shall be acceptable to the Insurer to be insured
     under  policies of insurance identical in form and substance to  the
     Insurance included and will be so included upon acquisition  by  the
     Trust.

          (e)  The Depositor shall furnish a notice to the Trustee (which
     may  be  part of the Failed Contract Notice) in respect of  the  New
     Bond  purchased or to be purchased that shall (i) identify  the  New
     Bonds,  (ii)  state that the contract to purchase, if  any,  entered
     into  by  the  Depositor is satisfactory in form and substance,  and
     (iii) state that the foregoing conditions of clauses (a) through (d)
     have been satisfied with respect to the New Bonds.

     Upon  satisfaction of the foregoing conditions with respect  to  any
New  Bonds, the Depositor shall pay the purchase price for the New  Bonds
from  its  own  resources or if and to the extent that  the  Trustee  has
credited any moneys and/or letters of credit attributable to the  Special

                                   -23-
<PAGE>
Bonds  to the Principal Account of such Trust, the Trustee shall pay  the
purchase  price of the New Bonds upon directions from the Depositor  from
the  moneys  and/or letters of credit so credited.  If the Depositor  has
paid the purchase price and, in addition, the Trustee has credited moneys
of  the  Depositor  to the Principal Account of such Trust,  the  Trustee
shall  forthwith return to the Depositor the portion of such moneys  that
is not properly distributable to Unitholders pursuant to Section 3.05.

     Whenever any New Bond is acquired by the Depositor pursuant  to  the
provisions  of  this Section 3.14, the Trustee shall,  within  five  days
after the delivery thereof to the Trustee mail to all Unitholders of  the
respective Trust notices of such acquisition, including an identification
of  the Special Bonds and the New Bonds acquired.  The Trustee shall  not
be  liable or responsible in any way for depreciation or loss incurred by
reason  of  any  purchase  of Special Bonds or  New  Bonds  made  by  the
Depositor  and in the absence of a purchase by the Depositor the  Trustee
shall  have no duty to purchase any New Bonds under this Indenture.   The
Depositor  shall not be liable for any failure to purchase any New  Bonds
or  for  errors  of  judgment in respect of this Section 3.14;  PROVIDED,
HOWEVER,  that  these provisions shall not protect the Depositor  against
any liability to which it would otherwise be subject by reason of willful
misfeasance,  bad  faith or gross negligence in the  performance  of  its
duties  or  by  reason of its reckless disregard of its  obligations  and
duties hereunder.

     Notwithstanding  anything to the contrary in this  Section 3.14,  no
deposit of New Bonds will be made without an opinion of counsel that such
substitution will not adversely affect the federal income tax  status  of
the  Trust, if such New Bonds when added to all previously purchased  New
Bonds in the Trust exceeds 15% of the principal amount of Bonds initially
deposited in the Trust.
                               
                               
                               
                             ARTICLE IV
                               
              EVALUATION, REDEMPTION, PURCHASE, TRANSFER OR
          INTERCHANGE OF UNITS AND REPLACEMENT OF CERTIFICATES

SECTION 4.01.   EVALUATION:  The Trustee shall make an evaluation of each
Trust as of 4 p.m. eastern time, (i) on the last business day of each  of
the  months of June and December, (ii) on the day on which any Unit of  a
respective Trust is tendered for redemption, and (iii) on any  other  day
desired  by  the Trustee or requested by the Depositor.  Such evaluations
shall  take into account and itemize separately, (1) the cash on hand  in
the  respective  Trust (other than cash declared held in trust  to  cover
contracts  to purchase bonds) or moneys in the process of being collected
from  matured interest coupons or bonds matured or called for  redemption
prior to maturity, (2) the value of each issue of the Bonds in the Trust,
and   (3)  interest  accrued  thereon  not  subject  to  collection   and
distribution.   In making the evaluations the Trustee may  determine  the
value of each issue of the Bonds in the Trust by the following methods or
any combination thereof which it deems appropriate:  (i) on the basis  of
current  bid prices of such Bonds as obtained from investment dealers  or
brokers   (including  the  Depositor)  who  customarily  deal  in   bonds

                                   -24-
<PAGE>
comparable  to  those held by the Trust, or (ii) if bid  prices  are  not
available  for  any  of  such  Bonds, on the  basis  of  bid  prices  for
comparable bonds, or (iii) by causing the value of the Bonds in the Trust
to be determined by others engaged in the practice of evaluating, quoting
or  appraising bonds.  For each such evaluation there shall  be  deducted
from  the sum of the above (i) amounts representing any applicable  taxes
or  governmental  charges  payable out of the  Trust  and  for  which  no
deductions shall have previously been made for the purpose of addition to
the  Reserve  Account  of such Trust, (ii) amounts  representing  accrued
expenses  of  the  Trust including but not limited  to  unpaid  fees  and
expenses of the Trustee, the Depositor and bond counsel, in each case  as
reported  by  the Trustee to the Depositor on or prior  to  the  date  of
evaluation, and (iii) cash held for distribution to Unitholders  of  such
Trust  of  record as of a date prior to the evaluation then  being  made.
The value of the pro rata share of each Unit of such Trust determined  on
the basis of any such evaluation shall be referred to herein as the "Unit
Value".

     The  Depositor shall make an evaluation of each Trust as of  4  p.m.
eastern time, (i) on the last business day of each of the months of  June
and December, (ii) on the day in which any Unit of such Trust is tendered
for  redemption, and (iii) on any other day such an evaluation is desired
by  the Trustee or is deemed necessary by the Depositor.  Such evaluation
shall  be made on the same basis as set forth in the preceding paragraph.
The  Trustee, in lieu of making the evaluation provided in the  preceding
paragraph, may use the evaluation made by the Depositor for all  purposes
of  this Indenture, except as provided in the following paragraph, and in
so  doing,  shall  not be liable or responsible, under any  circumstances
whatever,  for the accuracy or correctness thereof or for  any  error  or
omission therein.

     The  Trustee shall make an evaluation of the Bonds deposited in each
Trust  as  of the day preceding the day on which said Bonds are deposited
under this Indenture.  Such evaluation shall be made on the same basis as
set forth in the second preceding paragraph except that it shall be based
upon  offering  prices  of said Bonds.  In addition  to  the  methods  of
determining the value of the Bonds described above, the Trustee may  make
the  initial evaluation in whole or in part by reference to the Blue List
of  Current  Municipal  Offerings  (a daily  publication  containing  the
current  public  offering prices of bonds of all grades  currently  being
offered  by  dealers  and  banks).  The Trustee's  determination  of  the
offering  price of the Bonds on the date of deposit shall be included  in
the Schedules attached hereto.

     SECTION 4.02. REDEMPTIONS BY TRUSTEE; PURCHASES BY DEPOSITOR:
A  Certificated  Unitholder  may  redeem  his Units by sending a  written
redemption  request and tendering his Certificate to the Trustee  at  its
corporate  trust  office in the City of New York.   Any  individual  Book
Entry  Unitholder redeeming 1,000 Units or less may do  so  by  telephone
upon  completion and submission to the Trustee of a Telephone  Redemption
Authorization  Form prior to the date of redemption (the  "ELIGIBLE  BOOK
ENTRY  UNITHOLDERS").  All other Book Entry Unitholders must  make  their
redemption  request  in  writing to the Trustee at  its  corporate  trust
office in the City of New York, and may do so by (i) completing the  form
on  the  reverse side of their Book Entry Position Confirmation  or  (ii)
sending  a  written  redemption  request  which  includes  (a)  the   tax
identification  number for the account, (b) the name and address  of  the
redeeming  Unitholder, (c) a complete description  of  the  Units  to  be

                                   -25-
<PAGE>
redeemed  with  the Trust number and payment option, (d)  the  number  of
Units  to  be redeemed, (e) a notation that the Units are in  Book  Entry
form  and  (f)  the  number of Units remaining, if the  redemption  is  a
partial redemption.  Any proper request for redemption made in one of the
manners  provided  for  above shall be effected by  the  Trustee  on  the
seventh  calendar  day  following the  day  on  which  such  request  for
redemption  is  made, provided that if such day of redemption  is  not  a
business day, then such Units shall be redeemed on the first business day
prior  thereto (being herein called the "REDEMPTION DATE").   Subject  to
payment  by  any  redeeming Unitholder of any tax or  other  governmental
charges  which may be imposed thereon, such redemption is to be  made  by
payment  on  the  Redemption Date of cash equivalent to the  Unit  Value,
determined  by the Trustee as of 4:00 p.m. eastern time, on the  date  of
tender, multiplied by the number of Units owned by the Unitholder plus  a
sum  equivalent to the amount of accrued interest which would  have  been
payable  on  such  Units to, but not including, the  fifth  business  day
following  the  date  of tender (herein called the  "REDEMPTION  PRICE").
Unit  redemption  requests received by telephone or  in  writing  by  the
Trustee  on any day after 4:00 p.m. eastern time will be treated  by  the
Trustee  as received on the next day on which the New York Stock Exchange
is  open for trading and will be deemed to have been received on such day
for redemption at the Redemption Price computed on that day.

     The Trustee may in its discretion, and shall when so directed by the
Depositor,  suspend  the right of redemption for  Units  of  a  Trust  or
postpone  the date of payment of the Redemption Price therefor  for  more
than seven calendar days following the day on which a proper request  for
redemption  is  made in the manner provided for in this Section 4.02  (1)
for  any period during which the New York Stock Exchange is closed  other
than  customary weekend and holiday closings or during which  trading  on
the  New  York  Stock Exchange is restricted; (2) for any  period  during
which an emergency exists as a result of which disposal by such Trust  of
the  Bonds  is  not  reasonably  practicable  or  it  is  not  reasonably
practicable fairly to determine in accordance herewith the value  of  the
Bonds;  or  (3)  for  such  other period as the Securities  and  Exchange
Commission may by order permit, and shall not be liable to any person  or
in  any  way  for  any  loss or damage which may  result  from  any  such
suspension or postponement.

     Not later than the close of business on the day a proper request for
redemption  in  the  manner  provided  for  in  this  Section 4.02  by  a
Unitholder other than the Depositor is received, the Trustee shall notify
the  Depositor of such request.  The Depositor shall have  the  right  to
purchase such Units by notifying the Trustee of its election to make such
purchase as soon as practicable thereafter but in no event subsequent  to
the  close of business on the second business day after the day on  which
the  request  for redemption of such Units was received.   Such  purchase
shall  be  made  by  payment  for such Units  by  the  Depositor  to  the
Unitholder not later than the close of business on the Redemption Date of
an  amount equal to the Redemption Price which would otherwise be payable
by the Trustee to such Unitholder.

     Any  Unit  so  purchased by the Depositor may at the option  of  the
Depositor  be  tendered to the Trustee for redemption  at  the  corporate
trust office of the Trustee in the manner provided in the first paragraph
of this Section 4.02.

     If  the  Depositor does not elect to purchase any Unit  of  a  Trust
tendered to the Trustee for redemption, or if a Unit is being tendered by

                                   -26-
<PAGE>
the  Depositor for redemption, that portion of the Redemption Price which
represents interest shall be withdrawn from the Interest Account of  such
Trust  to  the  extent available.  The balance paid  on  any  redemption,
including accrued interest, if any, shall be withdrawn from the Principal
Account  of  such Trust to the extent that funds are available  for  such
purpose.   If  such available balance shall be insufficient  the  Trustee
shall sell such of the Bonds held in such Trust currently designated  for
such  purposes  by  the Depositor as the Trustee in its  sole  discretion
shall  deem necessary.  In the event that funds are withdrawn  from  such
Principal Account for payment of accrued interest, such Principal Account
shall be reimbursed for such funds so withdrawn when sufficient funds are
next available in such Interest Account.

     The  Depositor  shall maintain with the Trustee a  current  list  of
Bonds  held  in  each  Trust designated to be sold  for  the  purpose  of
redemption  of  Units  of  each Trust tendered  for  redemption  and  not
purchased  by  the  Depositor,  and for payment  of  expenses  hereunder,
provided that if the Depositor shall for any reason fail to maintain such
a list, the Trustee, in its sole discretion, may designate a current list
of  Bonds for such purposes.  The net proceeds of any sales of Bonds from
such  list  representing  principal shall be credited  to  the  Principal
Account of such Trust and the proceeds of such sales representing accrued
interest, if any, but not accrued original issue discount, if any,  shall
be credited to the Interest Account of such Trust.

     The  Trustee  shall  not be liable or responsible  in  any  way  for
depreciation  or  loss  incurred by reason of  any  sale  of  Bonds  made
pursuant to this Section 4.02.

     Certificates evidencing Units redeemed pursuant to this Section 4.02
shall be canceled by the Trustee and the Unit or Units evidenced by  such
Certificates or Book Entry Positions recorded on the books of the Trustee
shall be terminated by such redemptions.

SECTION 4.03.   TRANSFER OR INTERCHANGE OF UNITS:  Units represented
by a
Certificate may be transferred to another person by the registered holder
thereof by written request to the Trustee accompanied by presentation and
surrender of the Certificate at the corporate trust office of the Trustee
properly  endorsed or accompanied by a written instrument or  instruments
of  transfer  in  form satisfactory to the Trustee and  executed  by  the
Certificated Unitholder.  Units represented by a Book Entry Position  may
be  transferred  by  delivery  of written transfer  instructions  to  the
corporate  trust  office of the Trustee in such form and  accompanied  by
such  documents  as the Trustee may require.  Units transferred,  whether
represented  prior  to the transfer in certificated form  or  book  entry
form,  shall  after the transfer be represented in the same form,  unless
otherwise  requested by the transferor.  Upon such transfer,  either  (i)
new   Book   Entry   Position  Confirmation(s),   (ii)   new   registered
Certificate(s)  or (iii) any combination thereof, representing  the  same
number  of  Units  as were transferred, will be issued  in  exchange  and
substitution therefor.  Any Certificated Unitholder may change  to  book
entry   ownership  upon  submitting  to  the  Trustee  such  Unitholder's
Certificate  or  Certificates  along  with  a  written  request  in  form

                                   -27-
<PAGE>
satisfactory  to  the  Trustee  that  the  Units  represented   by   such
Certificate or Certificates thereafter be held in book entry form.   Upon
such  surrender, an appropriate notation will be made in the registration
books  of  the  Trust  to indicate that the Units formerly  evidenced  by
Certificates  are  held  in  a  Book  Entry  Position.   Any  Book  Entry
Unitholder  may  change to Certificate ownership of  the  same  Trust  by
submitting a written request to the Trustee in form satisfactory  to  the
Trustee.

     Certificates  issued pursuant to this Indenture are  interchangeable
for one or more other Certificates representing an equal aggregate number
of  Units  of the same Trust.  All Units shall be issued in denominations
of  one Unit or any multiple and fraction thereof as may be requested  by
the  Unitholder.  Fractions of Units shall be computed to  three  decimal
places.

     The  Trustee  may  deem  and  treat the person  in  whose  name  any
Certificate or Book Entry Position shall be registered upon the books  of
the  Trustee as the owner of the related Units for all purposes hereunder
and  the Trustee shall not be affected by any notice to the contrary, nor
be  liable  to  any person or in any way for so deeming and treating  the
person in whose name any Certificate or Book Entry Position shall  be  so
registered.

     A  sum  sufficient to pay any tax or other governmental charge  that
may  be imposed in connection with any such transfer or interchange shall
be  paid  by  the Unitholder to the Trustee.  The Trustee may  require  a
Unitholder  to  pay  $2.00 for each new Certificate issued  on  any  such
transfer or interchange.

     All  Units canceled pursuant to this Indenture shall be disposed  of
by the Trustee without liability on its part.

SECTION 4.04.   CERTIFICATES MUTILATED, DESTROYED, STOLEN  OR  LOST: 
 In
case  any  Certificate shall become mutilated or be destroyed, stolen  or
lost, the Trustee shall execute and deliver a new Certificate or, at  the
Certificated Unitholder's written request in a form satisfactory  to  the
Trustee  to thereafter hold the Units in a Book Entry Position, enter  an
equivalent Book Entry Position on the records of the Trustee pursuant  to
Section 4.03  in exchange and substitution therefor upon the Unitholder's
furnishing  the  Trustee  with  proper  identification  and  satisfactory
indemnity,   complying  with  such  other  reasonable   regulations   and
conditions as the Trustee may prescribe and paying such expenses  as  the
Trustee  may  incur.  Any mutilated Certificate shall be duly surrendered
and cancelled before any new Certificate or Book Entry Position shall  be
issued  or  recorded  in exchange and substitution  therefor.   Upon  the
issuance  of any new Certificate or recording of any Book Entry  Position
on  the  books  of the Trustee a sum sufficient to pay any tax  or  other
governmental  charge  and the fees and expenses of  the  Trustee  may  be
imposed.  Any such new Certificate issued or Book Entry Position recorded
on  the  books  of the Trustee pursuant to this Section shall  constitute
complete  and indefeasible evidence of ownership of Units in the  related
Trust,  as  if  originally issued, whether or not  the  lost,  stolen  or
destroyed  Certificate shall be found at any  time.   In  the  event  the
related  Trust  has terminated or is in the process of  termination,  the
Trustee may, instead of issuing a new Certificate or recording of a  Book
Entry  Position  in  exchange and substitution for any Certificate  which
shall have become mutilated or shall have been destroyed, stolen or lost,
make the distributions in respect of such mutilated, destroyed, stolen or
lost  Certificate  (without surrender thereof except in  the  case  of  a
mutilated Certificate) as provided in Section 7.02 hereof if the  Trustee
is furnished with such security or indemnity as it may require to save it

                                   -28-
<PAGE>
harmless, and in the case of destruction, loss or theft of a Certificate,
evidence to the satisfaction of the Trustee of the destruction,  loss  or
theft of such Certificate and of the ownership thereof.

SECTION 4.05.   COMPENSATION OF DEPOSITOR:  For services performed 
under
this  Indenture in evaluating and for maintaining surveillance  over  the
Bonds  in  each  Trust, the Depositor shall be paid $0.17 per  annum  per
$1,000 principal amount of Bonds in each Trust.  Such compensation  shall
be  computed on the basis of the greatest amount of such principal amount
of  Bonds  in  each Trust at any time during the period with  respect  to
which such compensation is being computed and may, from time to time,  be
adjusted provided that the total adjustment upward does not, at the  time
of  such  adjustment, exceed the percentage of the total increase,  after
the  date  hereof,  in consumer prices for services as  measured  by  the
United  States  Department of Labor Consumer Price  Index  entitled  "All
Services  Less  Rent"  or if such index no longer  exists,  a  comparable
index.  The consent or concurrence of any Unitholder hereunder shall  not
be  required for any such adjustment or increase.  The Depositor shall in
addition  be compensated for its costs incurred in providing  such  other
services  to  the Trust as the Trustee shall request.  Such  compensation
shall  be  charged by the Trustee, upon receipt of invoice therefor  from
the  Depositor,  against  the  Interest and  Principal  Accounts  of  the
respective Trusts on or before the Distribution Date on which such period
terminates.  If the cash balances in the Interest and Principal  Accounts
of  any  Trust  shall  be  insufficient to provide  for  amounts  payable
pursuant to this Section 4.05, the Trustee shall have the power  to  sell
(i)  Bonds of such Trust from the current list of Bonds designated to  be
sold  pursuant to Section 4.02 hereof, or (ii) if no such Bonds have been
so designated such Bonds of such Trust as the Trustee may see fit to sell
in  its  own  discretion, and to apply the proceeds of any such  sale  in
payment of the amounts payable pursuant to this Section 4.05.  Any moneys
payable  to the Depositor pursuant to this Section 4.05 shall be  secured
by  a prior lien on such Trust except that no such lien shall be prior to
any lien in favor of the Trustee under the provisions of Section 5.04.

                                ARTICLE V

                                 TRUSTEE

SECTION 5.01.   GENERAL DEFINITION OF TRUSTEE'S LIABILITIES,  RIGHTS 
AND
DUTIES:  The Trustee shall in its discretion undertake such action as  it
may  deem  necessary at any and all times to protect each Trust  and  the
rights  and  interests of the Unitholders pursuant to the terms  of  this
Indenture,  PROVIDED,  HOWEVER,  that the  expenses  and  costs  of  such
actions, undertakings or proceedings shall be reimbursable to the Trustee
from the Interest and Principal Accounts of such Trust and the payment of
such  costs and expenses shall be secured by a prior lien on such  Trust.
In  addition to and notwithstanding the other duties, rights,  privileges
and liabilities of the Trustee as otherwise set forth the liabilities  of
the Trustee are further defined as follows:

          (a)    All  moneys deposited with or received  by  the  Trustee
     hereunder related to a Trust shall be held by it without interest in
     trust  as  part of such Trust or the Reserve Account of  such  Trust
     until required to be disbursed in accordance with the provisions  of

                                   -29-
<PAGE>
     this  Indenture  and  such  moneys will be  segregated  by  separate
     recordation  on  the trust ledger of the Trustee  so  long  as  such
     practice  preserves a valid preference under applicable law,  or  if
     such  preference is not so preserved the Trustee shall  handle  such
     moneys in such other manner as shall constitute the segregation  and
     holding  thereof  in  trust  within the meaning  of  the  Investment
     Company Act of 1940.

          (b)    The  Trustee shall be under no liability for any  action
     taken  in  good faith on any appraisal, paper, order, list,  demand,
     request, consent, affidavit, notice, opinion, direction, evaluation,
     endorsement, assignment, resolution, draft or other document whether
     or  not  of the same kind prima facie properly executed, or for  the
     disposition  of moneys, Bonds, Certificates or Book Entry  Positions
     pursuant to this Indenture, or in respect of any evaluation which it
     is  required  to make or is required or permitted to  have  made  by
     others  under this Indenture or otherwise, except by reason  of  its
     own  negligence, lack of good faith or willful misconduct,  provided
     that the Trustee shall not in any event be liable or responsible for
     any  evaluation made by the Depositor.  The Trustee may construe any
     of  the provisions of this Indenture, insofar as the same may appear
     to  be  ambiguous or inconsistent with any other provisions  hereof,
     and any construction of any such provisions hereof by the Trustee in
     good faith shall be binding upon the parties hereto.

          (c)   The Trustee shall not be responsible for or in respect of
     the  recitals herein, the validity or sufficiency of this  Indenture
     or  for the due execution hereof by the Depositor, or for the  form,
     character, genuineness, sufficiency, value or validity of any  Bonds
     (except  that the Trustee shall be responsible for the  exercise  of
     due  care  in determining the genuineness of Bonds delivered  to  it
     pursuant to contracts for the purchase of such Bonds) or for  or  in
     respect of the validity or sufficiency of any Certificates or of the
     due  execution thereof by the Depositor, or for the payment  by  the
     Insurer  of  amounts due under or the performance by the Insurer  of
     its  obligations in accordance with the Insurance, and  the  Trustee
     shall in no event assume or incur any liability, duty, or obligation
     to  any Unitholder or the Depositor other than as expressly provided
     for  herein.  The Trustee shall not be responsible for or in respect
     of the validity of any signature by or on behalf of the Depositor.

          (d)    The Trustee shall not be under any obligation to  appear
     in, prosecute or defend any action, which in its opinion may involve
     it  in  expense  or liability, unless as often as  required  by  the
     Trustee,  it  shall  be  furnished  with  reasonable  security   and
     indemnity against such expense or liability, and any pecuniary  cost
     of  the  Trustee from such actions shall be deductible  from  and  a
     charge  against the Interest and Principal Accounts of the  affected
     Trust or Trusts.

          (e)   The Trustee may employ agents, attorneys, accountants and
     auditors  and shall not be answerable for the default or  misconduct
     of  any  such  agents, attorneys, accountants or  auditors  if  such
     agents,  attorneys, accountants or auditors shall have been selected
     with  reasonable  care.   The Trustee shall be  fully  protected  in
     respect  of  any action under this Agreement taken, or suffered,  in

                                   -30-
<PAGE>
     good  faith  by the Trustee, in accordance with the opinion  of  its
     counsel.   The fees and expenses charged by such agents,  attorneys,
     accountants  or auditors shall constitute an expense of the  Trustee
     reimbursable  from  the  Interest  and  Principal  Accounts  of  the
     affected Trust as set forth in Section 5.04 hereof.

          (f)    If at any time the Depositor shall fail to undertake  or
     perform  any of the duties which by the terms of this Indenture  are
     required  by  it  to be undertaken or performed, or  such  Depositor
     shall become incapable of acting or shall be adjudged a bankrupt  or
     insolvent, or a receiver of such Depositor or of its property  shall
     be  appointed, or any public officer shall take charge or control of
     such  Depositor  or of its property or affairs for  the  purpose  of
     rehabilitation, conservation or liquidation, then in any such  case,
     the  Trustee may:  (1) appoint a successor depositor who  shall  act
     hereunder in all respects in place of such Depositor which successor
     shall  be  satisfactory to the Trustee, and which may be compensated
     at   rates  deemed  by  the  Trustee  to  be  reasonable  under  the
     circumstances,  by deduction ratably from the Interest  Accounts  of
     the  affected  Trusts or, to the extent funds are not  available  in
     such Account, from the Principal Accounts of the affected Trusts but
     no  such deduction shall be made exceeding such reasonable amount as
     the  Securities and Exchange Commission may prescribe in  accordance
     with  Section 26(a)(2)(C) of the Investment Company Act of 1940,  or
     (2)  terminate  and  liquidate  the affected  Trust  in  the  manner
     provided in Section 7.02.

          (g)    If (i) the value of any Trust as shown by any evaluation
     by  the  Trustee pursuant to Section 4.01 hereof shall be less  than
     twenty  per  cent (20%) of the aggregate principal amount  of  Bonds
     initially  deposited  in  such Trust,  or  (ii)  by  reason  of  the
     Depositor's redemption of Units of a Trust not theretofore sold, the
     net  worth of the Trust is reduced to less than forty per cent (40%)
     of  the  aggregate  principal amount of  Bonds  initially  deposited
     therein,  the  Trustee  may in its discretion,  and  shall  when  so
     directed  by the Depositor, terminate this Indenture and  the  trust
     created  hereby insofar as they related to such Trust and  liquidate
     such Trust, all in the manner provided in Section 7.02.

          (h)   In no event shall the Trustee 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 hereunder or upon
     or in respect of any Trust which it 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 the premises. For  all
     such taxes and charges and for any expenses, including counsel fees,
     which the Trustee may sustain or incur with respect to such taxes or
     charges, the Trustee shall be reimbursed and indemnified out of  the
     Interest  and  Principal  Accounts of the affected  Trust,  and  the
     payment of such amounts so paid by the Trustee shall be secured by a
     prior lien on such Trust.

          (i)    The  Trustee except by reason of its own  negligence  or
     willful  misconduct  shall not be liable for  any  action  taken  or
     suffered  to be taken by it in good faith and believed by it  to  be
     authorized  or  within the discretion or rights or powers  conferred
     upon it by this Indenture.

                                   -31-
<PAGE>
SECTION 5.02.    BOOKS,  RECORDS AND REPORTS:   The  Trustee  shall  keep
proper books of record and account of all the transactions of each  Trust
and  Book Entry Positions recorded on the books of the Trustee under this
Indenture at its unit investment trust office including a record  of  the
name  and address of, and the Certificates issued by each Trust and  held
by,  every Unitholder, and such books and records of each Trust shall  be
open  to  inspection by any Unitholder of such Trust  at  all  reasonable
times  during  the  Trustee's usual business hours.   The  Trustee  shall
cause audited statements as to the assets and income of each Trust to  be
prepared on an annual basis by independent public accountants selected by
the Depositor, PROVIDED, HOWEVER, (i) if the Sponsor shall provide to the
Trustee a written representation concluding that in the best judgment  of
the  Sponsor ceasing to prepare such annual audited statement  would  not
have  a material adverse impact on the marketability of the Units in  the
secondary market or (ii) if the cost to a Trust for preparation  of  such
statements  shall  exceed an amount equivalent to $.05  per  Unit  on  an
annual  basis  then  the  Trustee shall not  be  required  to  have  such
statements prepared.

     To  the extent permitted under the Investment Company Act of 1940 as
evidenced  by  an opinion of counsel to the Depositor, the Trustee  shall
pay,  or  reimburse  to  the  Depositor  or  others,  the  costs  of  the
preparation  of  documents and information with  respect  to  each  Trust
required  by  law or regulation in connection with the maintenance  of  a
secondary market in units of each Trust.  Such costs may include but  are
not  limited  to  accounting and legal fees, blue  sky  registration  and
filing  fees, printing expenses and other reasonable expenses related  to
documents required under Federal and state securities laws.

     The Trustee shall make such annual or other reports as may from time
to time be required under any applicable state or federal statute or rule
or regulation thereunder.

SECTION 5.03.    INDENTURE AND LIST OF BONDS ON FILE:  The Trustee  shall
keep a certified copy or duplicate original of this Indenture on file  at
its  corporate  trust office available for inspection at  all  reasonable
times  during  the  Trustee's usual business  hours  by  any  Unitholder,
together with a current list of the Bonds in each Trust.

SECTION 5.04.    COMPENSATION:   With  respect  to  Insured  Trusts   and
Traditional Trusts (other than Compound Interest Traditional Trusts), for
services  performed under this Indenture prior to the date  indicated  in
Item  5(c)  of Schedule A hereto, the Trustee shall be paid at  the  rate
specified in Item 11(a) of Schedule A hereto, and on and after such date,
the  Trustee shall be paid at the rates specified in Item 11(b)  of  such
Schedule A.  With respect to Compound Interest Traditional Trusts,  after
the  15th  day  of  the  month next succeeding the  month  in  which  the
Indenture was entered into as indicated in Item 2(a) of Schedule  A,  the
Trustee shall be paid $0.20 per annum per $1,000 principal amount payable
at  maturity of Bonds in such Compound Interest Traditional Trust.   Such
compensation with respect to each Trust shall be computed on the basis of
the  largest  principal amount of Bonds in such trust at any time  during
the  period  with  respect to which such compensation is being  computed.
The  Trustee  may  periodically  adjust  the  compensation  provided  for

                                   -32-
<PAGE>
pursuant  to  this  paragraph in response to fluctuations  in  short-term
interest   rates  and  average  cash  balances  of  the  Trust   accounts
(reflecting the cost to the Trustee of advancing funds to a Trust to meet
scheduled  distributions  and  changes in anticipated  earnings  on  cash
balances) and may, in addition, adjust such portion of its fee as is  not
computed  by  reference  to the cash balances in the  Trust  accounts  in
accordance  with  the percentage of the total increase,  after  the  date
hereof, in consumer prices for services as measured by the United  States
Department  of  Labor Consumer Price Index entitled  "All  Services  Less
Rent"  or,  if  such  index no longer exists, a  comparable  index.   The
consent  or concurrence of any Unitholder hereunder shall not be required
for  any such adjustment or increase.  Such compensation shall be charged
by  the Trustee against the Interest and Principal Accounts of each Trust
on  or  before  the  Distribution Date on which such  period  terminates;
PROVIDED, HOWEVER, that such compensation shall be deemed to provide
only
for the usual, normal and proper functions undertaken as Trustee pursuant
to  this  Indenture.  The Trustee shall charge the Interest and Principal
Accounts  relating to such Trust for any and all expenses, including  the
fees  of counsel which may be retained by the Trustee in connection  with
its  activities  hereunder and disbursements incurred hereunder  and  any
extraordinary  services performed by the Trustee  hereunder  relating  to
such  Trust.   The Trustee shall be indemnified ratably by  the  affected
Trust  and  held  harmless against any loss or liability accruing  to  it
without  negligence, bad faith or willful misconduct on its part, arising
out  of  or in connection with the acceptance or administration  of  this
trust,  including  the  costs and expenses (including  counsel  fees)  of
defending itself against any claim of liability in the premises.  If  the
cash  balances  in the Interest and Principal Accounts  of  the  affected
Trust  shall  be insufficient to provide for amounts payable pursuant  to
this  Section 5.04 the Trustee shall have the power to sell (i) Bonds  of
the  affected Trust from the current list of Bonds designated to be  sold
pursuant  to Section 4.02 hereof, or (ii) if no such Bonds have  been  so
designated such Bonds of the affected Trust as the Trustee may see fit to
sell in its own discretion, and to apply the proceeds of any such sale in
payment  of  the  amounts  payable pursuant to  this  Section 5.04.   The
Trustee shall not be liable or responsible in any way for depreciation or
loss  incurred  by  reason of any sale of Bonds  made  pursuant  to  this
Section 5.04.  Any moneys payable to the Trustee pursuant to this Section
shall be secured by a prior lien on the affected Trust.

     SECTION 5.05.    REMOVAL AND RESIGNATION OF TRUSTEE; SUCCESSOR: 
The
following provisions shall provide for the removal and resignation of the
Trustee and the appointment of any successor trustee:

         (a)   The Trustee or any trustee or trustees hereafter appointed
     may  resign  and  be  discharged  of  the  trusts  created  by  this
     Indenture,  by  executing  an instrument  in  writing  resigning  as
     Trustee  of  such trusts and filing the same with the Depositor  and
     mailing a copy of a notice of resignation to all Unitholders then of
     record,  not less than sixty days before the date specified in  such
     instrument when, subject to Section 5.05(e), such resignation is  to
     take  effect.   Upon  receiving  such  notice  of  resignation,  the
     Depositor  shall promptly appoint a successor trustee as hereinafter
     provided,  by  written instrument, in duplicate, one copy  of  which
     shall  be  delivered to the resigning Trustee and one  copy  to  the
     successor  trustee.   In case at any time the Trustee  shall  become
     incapable  of acting, or shall be adjudged a bankrupt or  insolvent,
     or  a receiver of the Trustee or of its property shall be appointed,

                                   -33-
<PAGE>
     or any public officer shall take charge or control of the Trustee or
     of  its  property  or  affairs for the purposes  of  rehabilitation,
     conservation or liquidation, then in any such case the Depositor may
     remove  the  Trustee  and  appoint a successor  trustee  by  written
     instrument,  in duplicate, one copy of which shall be  delivered  to
     the  Trustee  so  removed  and one copy to  the  successor  trustee;
     provided  that  a  notice  of  such removal  and  appointment  of  a
     successor  trustee  shall  be  mailed  by  the  Depositor  to   each
     Unitholder then of record.

          (b)    Any successor trustee appointed hereunder shall execute,
     acknowledge and deliver to the Depositor and to the retiring Trustee
     an   instrument  accepting  such  appointment  hereunder,  and  such
     successor trustee without any further act, deed or conveyance  shall
     become vested with all the rights, powers, duties and obligations of
     its  predecessor  hereunder with like effect as if originally  named
     Trustee herein and shall be bound by all the terms and conditions of
     this  Indenture.   Upon the request of such successor  trustee,  the
     Depositor  and  the  retiring Trustee shall,  upon  payment  of  any
     amounts  due  the  retiring Trustee, or provision  therefor  to  the
     satisfaction  of  such  retiring Trustee,  execute  and  deliver  an
     instrument acknowledged by it transferring to such successor trustee
     all  the rights and powers of the retiring Trustee; and the retiring
     Trustee  shall  transfer,  deliver and pay  over  to  the  successor
     trustee  all  Bonds  and moneys at the time held  by  it  hereunder,
     together  with all necessary instruments of transfer and  assignment
     or  other  documents  properly executed  necessary  to  effect  such
     transfer and such of the records or copies thereof maintained by the
     retiring Trustee in the administration hereof as may be requested by
     the  successor trustee, and shall thereupon be discharged  from  all
     duties  and  responsibilities under this  Indenture.   The  retiring
     Trustee shall, nevertheless, retain a lien upon all Bonds and moneys
     at  the time held by it hereunder to secure any amounts then due the
     retiring Trustee.

          (c)    In  case  at any time the Trustee shall  resign  and  no
     successor  trustee  shall  have been  appointed  and  have  accepted
     appointment within thirty days after notice of resignation has  been
     received by the Depositor, the retiring Trustee may forthwith  apply
     to  a  court  of  competent jurisdiction for the  appointment  of  a
     successor trustee.  Such court may thereupon, after such notice,  if
     any,  as  it  may  deem  proper and prescribe, appoint  a  successor
     trustee.

          (d)    Any corporation into which any trustee hereunder may  be
     merged  or  with  which it may be consolidated, or  any  corporation
     resulting  from  any merger or consolidation to  which  any  trustee
     hereunder  shall  be a party, shall be the successor  trustee  under
     this  Indenture  without  the execution  or  filing  of  any  paper,
     instrument  or  further act to be done on the part  of  the  parties
     hereto, anything herein, or in any agreement relating to such merger
     or  consolidation,  by which any such trustee  may  seek  to  retain
     certain powers, rights and privileges theretofore obtaining for  any
     period  of  time  following  such merger or  consolidation,  to  the
     contrary notwithstanding.

          (e)   Any resignation or removal of the Trustee and appointment
     of  a  successor  trustee  pursuant to  this  Section  shall  become
     effective upon acceptance of appointment by the successor trustee as
     provided in subsection (b) hereof.

                                   -34-
<PAGE>
SECTION 5.06.    QUALIFICATIONS  OF TRUSTEE:   The  Trustee  shall  be  a
corporation  organized and doing business under the laws  of  the  United
States  or  any  state thereof, which is authorized under  such  laws  to
exercise  corporate  trust powers and having at all  times  an  aggregate
capital, surplus, and undivided profits of not less than $5,000,000.

                               ARTICLE VI

                          RIGHTS OF UNITHOLDERS

SECTION 6.01.    BENEFICIARIES OF TRUST:  By the purchase and  acceptance
or  other  lawful delivery and acceptance of a Certificate of a Trust  or
the  purchase  and acceptance of any Book Entry Position or other  lawful
delivery and acceptance of such Book Entry Position including receipt  of
a  Book  Entry Confirmation, the Unitholder (i) shall be deemed to  be  a
beneficiary  of such Trust and vested with all right, title and  interest
in  such Trust to the extent of the Unit or Units or fraction thereof set
forth  and evidenced by such Certificate or Book Entry Position and  (ii)
shall  assent  to  and  be  bound by the terms  and  conditions  of  this
Indenture.

SECTION 6.02.   RIGHTS, TERMS AND CONDITIONS:  In addition to  the  other
rights  and  powers set forth in the other provisions and  conditions  of
this Indenture the Unitholders shall have the following rights and powers
and shall be subject to the following terms and conditions:

          (a)   A Unitholder may at any time prior to the termination  of
     the  Trust  tender  his  Units  to the  Trustee  for  redemption  in
     accordance with Section 4.02.

          (b)    The  death  or  incapacity of any Unitholder  shall  not
     operate  to  terminate  this Indenture or  the  related  Trust,  nor
     entitle his legal representatives or heirs to claim an accounting or
     to  take  any  action  or  proceeding  in  any  court  of  competent
     jurisdiction for a partition or winding up of the Trust Fund or  the
     related  Trust,  nor  otherwise affect the rights,  obligations  and
     liabilities  of the parties hereto or any of them.  Each  Unitholder
     expressly waives any right he may have under any rule of law, or the
     provisions  of any statute, or otherwise, to require the Trustee  at
     any  time to account, in any manner other than as expressly provided
     in  this  Indenture, in respect of the Bonds or moneys from time  to
     time received, held and applied by the Trustee hereunder.

          (c)    No  Unitholder shall have any right to vote  or  in  any
     manner  otherwise control the operation and management of the  Trust
     Fund,  the  related Trust or the obligations of the parties  hereto,
     nor  shall anything herein set forth, or contained in the  terms  of
     the  Certificates, be construed so as to constitute the  Unitholders
     from  time  to  time as partners or members of an  association;  nor
     shall  any  Unitholder  ever be under any  liability  to  any  third
     persons  by  reason  of  any action taken by  the  parties  to  this
     Indenture, or any other cause whatsoever.

                                   -35-
<PAGE>

                              ARTICLE VII

             ADDITIONAL COVENANTS; MISCELLANEOUS PROVISIONS

SECTION 7.01.   AMENDMENTS:  This Indenture may be amended from  time  to
time  by  the parties hereto or their respective successors, without  the
consent of any of the Unitholders (a) to cure any ambiguity or to correct
or  supplement any provision contained herein which may be  defective  or
inconsistent with any other provision contained herein; or  (b)  to  make
such  other provision in regard to matters or questions arising hereunder
as shall not adversely affect the interests of the Unitholders; PROVIDED,
HOWEVER,  that the parties hereto may not amend this Indenture so  as  to
(1)  increase the number of Units issuable hereunder above the number  of
Units  as indicated in Item 4 of Schedule A hereto except as provided  in
Section 4.04  hereof or such lesser amount as may be outstanding  at  any
time  during  the term of this Indenture or (2) subject to Sections  3.08
and  3.14, permit the deposit or acquisition hereunder of obligations  or
other securities either in addition to or in substitution for any of  the
Bonds.

     Promptly after the execution of any such amendment the Trustee shall
furnish  written notification to all the outstanding Unitholders  of  the
substance of such amendment.

SECTION 7.02.    TERMINATION:   Each  Trust  shall  terminate  upon   the
maturity, redemption, sale or other disposition as the case may be of the
last  Bond  held  in such Trust unless sooner terminated as  hereinbefore
specified and may be terminated at any time by the written consent of one
hundred  per  cent of the Unitholders of the respective Trust;  PROVIDED,
that in no event shall any Trust continue beyond the date as indicated in
Item 8   of  Schedule A  hereto.   Written  notice  of  any  termination,
specifying  for Certificated Unitholders the time or times at  which  the
Certificated  Unitholders of such Trust may surrender their  Certificates
for  cancellation shall be given by the Trustee to each such Certificated
Unitholder  at  his address appearing on the registration  books  of  the
Trustee.  Written notice of any termination shall be given by the Trustee
to   each  Book  Entry  Unitholder  at  his  address  appearing  on   the
registration  books of the Trustee.  Within a reasonable period  of  time
after  the  termination of a Trust the Trustee shall fully liquidate  the
Bonds of such Trust then held, if any, and shall:

          (a)   deduct from the Interest Account of such Trust or, to the
     extent  that  funds  are  not available in such  Account,  from  the
     Principal  Account of such Trust and pay to itself  individually  an
     amount  equal  to  the sum of (1) its accrued compensation  for  its
     ordinary recurring services in connection with such Trust,  (2)  any
     compensation  due  it for its extraordinary services  in  connection
     with  such  Trust  and  (3) any costs, expenses  or  indemnities  in
     connection with such Trust as provided herein;

          (b)   deduct from the Interest Account of such Trust or, to the
     extent  that  funds  are  not available in such  Account,  from  the
     Principal Account of such Trust and pay accrued and unpaid  fees  of
     bond counsel in connection with such Trust, if any, as directed  and
     certified to by the Depositor;

                                   -36-
<PAGE>
          (c)    deduct  from the Interest Account of such Trust  or  the
     Principal Account of such Trust any amounts which may be required to
     be  deposited  in the Reserve Account of such Trust to  provide  for
     payment  of  any applicable taxes or other governmental charges  and
     any  other  amounts which may be required to meet expenses  incurred
     under this Indenture in connection with such Trust;

          (d)    distribute  to  each  Unitholder  of  such  Trust,  upon
     surrender  for  cancellation of his Certificate or Certificates,  if
     any,  such  holder's pro rata share of the balance of  the  Interest
     Account of such Trust;

          (e)    distribute  to  each  Unitholder  of  such  Trust,  upon
     surrender, for cancellation by the Unitholder of his Certificate  or
     Certificates,  if  any,  such Unitholder's pro  rata  share  of  the
     balance of the Principal Account of such Trust; and

          (f)    together  with such distribution to each  Unitholder  as
     provided for in (d) and (e), furnish to each such Unitholder a final
     distribution  statement  as of the date of the  computation  of  the
     amount  distributable to Unitholders, setting  forth  the  data  and
     information  in  substantially the form and manner provided  for  in
     Section 3.06 hereof.

     The  amounts to be so distributed to each Unitholder shall  be  that
pro  rata  share  of  the  balance of the total  Interest  and  Principal
Accounts  of  such  Trust as shall be represented by  the  Units  therein
evidenced  by the outstanding Certificate or Certificates held of  record
by  such Unitholder and/or as evidenced on the records of the Trustees as
Book Entry Positions.

     The  Trustee shall be under no liability with respect to moneys held
by  it  in  the Interest, Reserve and Principal Accounts of a Trust  upon
termination  except  to  hold the same in trust  without  interest  until
disposed of in accordance with the terms of this Indenture.

     In  the event that all of the Certificated Unitholders of such Trust
shall not surrender their Certificates for cancellation within six months
after  the  time  specified in the above-mentioned  written  notice,  the
Trustee shall give a second written notice to such remaining Certificated
Unitholders to surrender their written Certificates for cancellation  and
receive the liquidation distribution with respect thereto.  If within one
year after the second notice all the Certificates of such Trust shall not
have  been  surrendered for cancellation, the Trustee may take steps,  or
may appoint an agent to take appropriate steps, to contact such remaining
Certificated  Unitholders concerning surrender of their Certificates  and
the  cost thereof shall be paid out of the moneys and other assets  which
remain in such Trust hereunder.

SECTION 7.03.    CONSTRUCTION:  This Indenture is executed and  delivered
in  the State of New York, and all laws or rules of construction of  such
State  shall  govern the rights of the parties hereto and the Unitholders
and the interpretation of the provisions hereof.

                                   -37-
<PAGE>
SECTION 7.04.    REGISTRATION  OF  UNITS:   The  Depositor   agrees   and
undertakes  to  register  the  Units with  the  Securities  and  Exchange
Commission or other applicable governmental agency pursuant to applicable
Federal or State statutes, if such registration shall be required, and to
do  all  things  that may be necessary or required to  comply  with  this
provision  during the term of the Trust Fund created hereunder,  and  the
Trustee shall incur no liability or be under any obligation or expense in
connection therewith.

SECTION 7.05.    WRITTEN  NOTICE:   Any  notice,  demand,  direction   or
instruction  to be given to the Depositor hereunder shall be  in  writing
and  shall be duly given if mailed or delivered to the Depositor  at  333
West  Wacker Drive, Chicago, Illinois 60606, or at such other address  as
shall  be  specified  by the Depositor to the Trustee  in  writing.   Any
notice, demand, direction or instruction to be given to the Trustee shall
be  in  writing  and shall be duly given if mailed or  delivered  to  the
corporate trust office of the Trustee, 770 Broadway, New York,  New  York
10003,  Attention:  Unit Investment Trust Division or such other  address
as  shall  be specified to the Depositor by the Trustee in writing.   Any
notice  to  be given to the Unitholders shall be duly given if mailed  or
delivered  to each Unitholder at the address of such holder appearing  on
the registration books of the Trustee.

SECTION 7.06.    SEVERABILITY:  If any one  or  more  of  the  covenants,
agreements, provisions or terms of this Indenture shall be held  contrary
to  any  express provision of law or contrary to policy of  express  law,
though  not expressly prohibited, or against public policy, or shall  for
any  reason  whatsoever be held invalid, then such covenants, agreements,
provisions  or  terms  shall  be  deemed  severable  from  the  remaining
covenants, agreements, provisions or terms of this Indenture and shall in
no  way affect the validity or enforceability of the other provisions  of
this Indenture or of the Certificates or the rights of the Unitholders.

SECTION 7.07.     DISSOLUTION  OF  DEPOSITOR  NOT  TO   TERMINATE:   
The
dissolution of the Depositor from or for any cause whatsoever  shall  not
operate to terminate this Indenture insofar as the duties and obligations
of the Trustee are concerned.

                                   -38-
<PAGE>
TRUST INDENTURE AND AGREEMENT

     This Indenture between John Nuveen & Co. Incorporated, as Depositor,
and  United States Trust Company of New York, as Trustee, is entered into
as  of the date stated in Item 2 of Schedule A hereto and consists of the
Schedules  relating to Series ____ attached hereto and the terms  of  the
Trust Indenture and Agreement (not including the Schedules thereto) filed
as  Exhibit 1.1(a) to the Depositor's Registration Statement on Form  S-6
relating  to  Series ____, File No. _______, and such documents  and  the
provisions  thereof as incorporated herein by this reference  thereto  as
fully  as  if  they  were  set forth herein in their  entirety  and  such
documents and provisions so incorporated by reference constitute a single
instrument.

                                   -39-
<PAGE>
     IN  WITNESS WHEREOF, John Nuveen & Co. Incorporated, has caused this
Trust Indenture and Agreement to be executed by its President, one of its
Vice Presidents or one of its Assistant Vice Presidents and its corporate
seal  to be hereto affixed and attested by its Secretary or its Assistant
Secretary  and  United States Trust Company of New York has  caused  this
Trust  Indenture  and  Agreement  to be  executed  by  one  of  its  Vice
Presidents  or  Assistant Vice Presidents and its corporate  seal  to  be
hereto  affixed and attested to by one of its Assistant Secretaries;  all
as of the day, month and year first above written.

                                    JOHN NUVEEN & CO. INCORPORATED,
                                              Depositor


                                    By_____________________________
                                          Authorized Officer

(SEAL)

Attest:

By_______________________________
       Assistant Secretary

                                    UNITED STATES TRUST COMPANY OF NEW
                                       YORK, TRUSTEE


                                    By_________________________________
                                         Assistant Vice President

(SEAL)

Attest:

By_______________________________
      Assistant Secretary

                                   -40-
<PAGE>

                               SCHEDULE A

          Series _____                ___________________, 198__

Item 1.    This  Indenture relates to the Nuveen Tax-Exempt  Unit  Trust,
           Series _____.

Item 2.   The date of this Indenture is ______________, 198__.

Item 3.   Series ______ shall initially contain Trusts as follows:

         (1)   National Traditional Trust ______
         (2)   Long Intermediate Traditional Trust ______
         (3)   Intermediate Traditional Trust ______
         (4)   Short Intermediate Traditional Trust ______
         (5)   Short Term Traditional Trust ______
         (6)   [State] Traditional Trust ______
         (7)   [State] Intermediate Traditional Trust ______
         (8)   Compound Interest Trust ______
         (9)   National Insured Trust ______
        (10)   Long Intermediate Insured Trust ______
        (11)   Intermediate Insured Trust ______
        (12)   Short Intermediate Insured Trust ______
        (13)   Short Term Insured Trust ______
        (14)   [State] Insured Trust ______
        (15)   [State] Intermediate Insured Trust ______
        (16)   [State] Short Intermediate Insured Trust ______

Item 4.   Each Trust shall initially consist of the following Units:

           The National Traditional Trust shall initially consist of  ___
             Units.
           The Long Intermediate Traditional Trust shall initially consist
             of ___ Units.
           The Intermediate Traditional Trust shall initially consist  of
              ___ Units.
           The  Short  Intermediate  Traditional  Trust  shall  initially
             consist of ___ Units.
           The Short Term Traditional Trust shall initially consist of ___
             Units.
           The [State] Traditional Trust shall initially consist of ______
             Units.
           The  [State]  Intermediate Traditional Trust  shall  initially
             consist of _____ Units.
           The Compound Interest Traditional Trust shall initially consist
             of ______ Units.
           The  National  Insured Trust shall initially  consist  of  ___
             Units.
           The Long Intermediate Insured Trust shall initially consist of
             ___ Units.
           The Intermediate Insured Trust shall initially consist of  ___
             Units.
           The Short Intermediate Insured Trust shall initially consist of
             ___ Units.
           The  Short Term Insured Trust shall initially consist  of  ___
             Units.
           The [State] Insured Trust shall initially consist of ___ Units.
           The [State] Intermediate Insured Trust shall initially consist
             of ___ Units.
           The  [State] Short Intermediate Insured Trust shall  initially
             consist of ___ Units.

                                   A-1
<PAGE>
Item 5.      (a)  The amount of the second distribution from the Interest
                  Account of the respective Trusts will be as follows:

     (1)   National Traditional Trust;             $____________    per Unit
     (2)   Long Intermediate Traditional Trust;    $____________    per Unit
     (3)   Intermediate Traditional Trust;         $____________    per Unit
     (4)   Short Intermediate Traditional Trust;   $____________    per Unit
     (5)   Short Term Traditional Trust;           $____________    per Unit
     (6)   [State] Traditional Trust;              $____________    per Unit
     (7)   [State] Intermediate Traditional Trust; $____________    per Unit
     (8)   Compound Interest Traditional Trust;    $____________    per Unit
     (9)   National Insured Trust;                 $____________    per Unit
     (10)  Long Intermediate Insured Trust;        $____________    per Unit
     (11)  Intermediate Insured Trust;             $____________    per Unit
     (12)  Short Intermediate Insured Trust;       $____________    per Unit
     (13)  Short Term Insured Trust;               $____________    per Unit
     (14)  [State] Insured Trust;                  $____________    per Unit
     (15)  [State] Intermediate Insured Trust;     $____________    per Unit
     (16)  [State]  Short Intermediate  Insured    $____________    per Unit
           Trust;
             (b)   The  date of the second distribution for the  Interest
             Account of the respective Trusts will be as follows:

     (1)      National Traditional Trust;         ____________, 198___
     (2)      Long    Traditional    Intermediate ____________, 198___
              Trust;
     (3)      Intermediate Traditional Trust;     ____________, 198___
     (4)      Short    Intermediate   Traditional ____________, 198___
              Trust;
     (5)      Short   Term   Traditional   Trust; ____________, 198___
              _________
     (6)      [State] Traditional Trust;          ____________, 198___
     (7)      [State]   Intermediate  Traditional ____________, 198___
              Trust;
     (8)      Compound    Interest    Traditional ____________, 198___
              Trust;
     (9)      National Insured Trust;             ____________, 198___
     (10)     Long Intermediate Insured Trust;    ____________, 198___
     (11)     Intermediate Insured Trust;         ____________, 198___
     (12)     Short Intermediate Insured Trust;   ____________, 198___
     (13)     Short Term Insured Trust;           ____________, 198___
     (14)     [State] Insured Trust;              ____________, 198___
     (15)     [State] Intermediate Insured Trust; ____________, 198___
     (16)     [State]  Short Intermediate Insured ____________, 198___
              Trust;

             (c)   The  record date for the second distribution from  the
             Interest  Account  of  the  respective  Trusts  will  be  as
             follows:

     (1)      National Traditional Trust;         ____________ , 198___
     (2)      Long    Intermediate    Traditional ____________ , 198___
              Trust;
     (3)      Intermediate Traditional Trust;     ____________ , 198___

                                   A-2
<PAGE>
     (4)      Short    Intermediate   Traditional ____________ , 198___
              Trust;
     (5)      Short Term Traditional Trust;       ____________ , 198___
     (6)      [State] Traditional Trust;          ____________ , 198___
     (7)      [State]   Intermediate  Traditional ____________ , 198___
              Trust;
     (8)      Compound    Interest    Traditional ____________ , 198___
              Trust;
     (9)      National Insured Trust;             ____________ , 198___
     (10)     Long Intermediate Insured Trust;    ____________ , 198___
     (11)     Intermediate Insured Trust;         ____________ , 198___
     (12)     Short Intermediate Insured Trust;   ____________ , 198___
     (13)     Short Term Insured Trust;           ____________ , 198___
     (14)     [State] Insured Trust;              ____________ , 198___
     (15)     [State] Intermediate Insured Trust; ____________ , 198___
     (16)     [State]  Short Intermediate Insured ____________ , 198___
              Trust;

Item 6.   Record dates for subsequent semi-annual distributions from  the
          Interest  Account of the respective Trusts (other than Compound
          Interest Trusts) will be as follows:

Item 7.      (a)   Record  date  for  distributions  from  the  Principal
             Account  of the respective Trusts will be the first  day  of
             May and November of each year.

             (b)   The  first  record  date for  distributions  from  the
             Principal   Account  of  the  respective  trusts   will   be
             ____________.

Item 8.   The  Trusts  shall in no event continue beyond the end  of  the
          calendar  year  preceding  the  fiftieth  anniversary  of   the
          execution  of  this  Indenture for National and  State  Trusts,
          beyond  the  end of the calendar year preceding  the  twentieth
          anniversary   of   its   execution   for   Long   Intermediate,
          Intermediate and Compound Interest Trusts and beyond the end of
          the  calendar  year  preceding the  tenth  anniversary  of  its
          execution for Short Intermediate and Short Term Trusts.

Item 9.   Quarterly  distributions  from  the  Interest  Account  of  the
          respective  Trusts (other than a Compound Interest Trust)  will
          be  computed  as  of the 1st day of February, May,  August  and
          November.

Item 10.  Certain  deductions from the Interest Account  by  the  Trustee
          will commence as follows:
                                             
     (1)      National Traditional Trust;         ____________, 198___
     (2)      Long    Intermediate    Traditional ____________, 198___
              Trust;
     (3)      Intermediate Traditional Trust;     ____________, 198___
     (4)      Short    Intermediate   Traditional ____________, 198___
              Trust;
     (5)      Short Term Traditional Trust;       ____________, 198___
     (6)      [State] Traditional Trust;          ____________, 198___
     (7)      [State]   Intermediate  Traditional ____________, 198___
              Trust;

                                   A-3
<PAGE>
     (8)      Compound    Interest    Traditional ____________, 198___
              Trust;
     (9)      National Insured Trust;             ____________, 198___
     (10)     Long Intermediate Insured Trust;    ____________, 198___
     (11)     Intermediate Insured Trust;         ____________, 198___
     (12)     Short Intermediate Insured Trust;   ____________, 198___
     (13)     Short Term Insured Trust;           ____________, 198___
     (14)     [State] Insured Trust;              ____________, 198___
     (15)     [State] Intermediate Insured Trust; ____________, 198___
     (16)     [State]  Short Intermediate Insured ____________, 198___
              Trust;

Item 11.     (a)   For services performed prior to the date indicated  in
             Item  5(c) of this Schedule A, the Trustee shall be paid  at
             the following annual rates per $1,000 of principal amount of
             Bonds:

              (1)   National Traditional Trust etc.                   $

             (b)   For services performed on and after the date indicated
             in  Item 5(c) of this Schedule A, the Trustee shall be  paid
             at the following annual rates per $1,000 of principal amount
             of Bonds:

              (1)   National Traditional Trust

                    Monthly Plan of Distribution                 $
                    Quarterly Plan of Distribution               $
                    Semi-Annual Plan of Distribution etc.        $

                                   A-4
<PAGE>


       SCHEDULES B, C, D, E, F, G, H, I, J, K, L, M, N, O, P AND Q


                        BONDS INITIALLY DEPOSITED


                      NUVEEN TAX-EXEMPT UNIT TRUST,
                                 SERIES

Incorporated  herein and made a part hereof as indicated  below  are  the
corresponding  portions  of  the "Schedule  of  Investments  at  Date  of
Deposit"  contained  in  the Prospectus dated the  date  of  deposit  and
relating to the above-named Series:

     Schedule B:    The National Traditional Trust

     Schedule C:    The Long Intermediate Traditional Trust

     Schedule D:    The Intermediate Traditional Trust

     Schedule E:    The Short Intermediate Traditional Trust

     Schedule F:    The Short Term Traditional Trust

     Schedule G:    The [State] Traditional Trust

     Schedule H:    The [State] Intermediate Traditional Trust

     Schedule I:    The Compound Interest Traditional Trust

     Schedule J:    The National Insured Trust

     Schedule K:    The Long Intermediate Insured Trust

     Schedule L:    The Intermediate Insured Trust

     Schedule M:    The Short Intermediate Insured Trust

     Schedule N:    The Short Term Insured Trust

     Schedule O:    The [State] Insured Trust

     Schedule P:    The [State] Intermediate Insured Trust

     Schedule Q:    The [State] Short Intermediate Insured Trust




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