DELAWARE VOYAGEUR TAX EXEMPT TRUST SERIES 13
S-6/A, 1998-01-22
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         We have appreciated the courtesy and cooperation of the members of the
Staff and if there are any questions on which we may be of assistance, please do
not hesitate to call either Mark J. Kneedy at 312/845-3787 or Brian D. Free at
312/845-3017 collect.

                                                              Very truly yours,



                                                              CHAPMAN AND CUTLER

MJK/slm

<PAGE>


        AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 22, 1998
                                                      REGISTRATION NO. 333-44403

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                 AMENDMENT NO. 1
                                     TO THE
                             REGISTRATION STATEMENT
                                       ON
                                    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:   DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13

B.  NAME OF DEPOSITOR:     DELAWARE MANAGEMENT COMPANY, INC.

C. COMPLETE ADDRESS OF DEPOSITOR'S PRINCIPAL EXECUTIVE OFFICES:

                           DELWARE MANAGEMENT COMPANY, INC.
                                 One Commerce Square
                           Philadelphia, Pennsylvania 19103

D. NAME AND COMPLETE ADDRESS OF AGENT FOR SERVICE:
                                                        Copy to:
      George M. Chamberlain, Jr.                     MARK J. KNEEDY
   Delaware Management Company, Inc.             c/o Chapman and Cutler
          One Commerce Square                    111 West Monroe Street
   Philadelphia, Pennsylvania  19103            Chicago, Illinois  60603

                         CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>

<S>                              <C>                                  <C>                     <C>
 Title and amount of                                                   Proposed maximum           Amount of
securities being registered                                           aggregate offering      registration fee
                                                                             price

Delaware Group Tax-Exempt        An indefinite number of                  Indefinite                $0.00
     Trust, Series 13            Units of Beneficial Interest
                                 pursuant to Rule 24f-2 under
                                 the Investment Company Act of 1940

</TABLE>

E. APPROXIMATE DATE OF PROPOSED SALE TO PUBLIC:

         As soon as practicable after the effective date of the Registration
Statement.

/X:/     Check box if it is proposed that this filing will become effective on
         January 22, 1998 at 2:00 P.M. 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>


                   DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13

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

                              CROSS-REFERENCE SHEET

                 (FORM N-8B-2 ITEMS REQUIRED BY INSTRUCTIONS AS
                         TO THE PROSPECTUS IN FORM S-6)

<TABLE>
<CAPTION>

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

                     I. ORGANIZATION AND GENERAL INFORMATION

<S>                                                                          <C>
 1.  (a)  Name of Trust                                                      }  Prospectus front cover
 2.  (b)  Title of securities issued........................................ }  Summary of Essential
                                                                             }       Information
 3.  Name and address of each depositor..................................... }  Trust Administration
 4.  Name and address of Trustee............................................ }  Trust Administration
 5.  State of organization of Trust......................................... }  The Fund
 6.  Execution and termination of Trust agreement........................... }  Trust Administration
 7.  Changes of name                                                         }  The Fund; Trust Administration
 8.  Fiscal year                                                             }       *
 9.  Litigation                                                              }       *

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

10.  (a)  Registered of bearer securities................................... }  Rights of Unitholders
     (b)  Cumulative or distributive securities............................. }  Rights of Unitsholders; The
                                                                             }        Fund
     (c)  Redemption........................................................ }  Rights of Unitholders
     (d)  Conversion, transfer, etc......................................... }  Rights of Unitholders
     (e)  Periodic payment plan............................................. }        *
     (f)  Voting rights..................................................... }  Rights of Unitholders
     (g)  Notice of Unitholders............................................. }  Trust Administration
     (h)  Consents required................................................. }  Rights of Unitholders; Trust
                                                                             }        Administration
     (i)  Other provisions.................................................. }  Tax Status; Insurance on the
                                                                             }         Bonds
11.  Type of securities comprising units.................................... }  The Fund; The State Trusts
12.  Certain information regarding periodic payment                          }        *
           certificates                                                      }

</TABLE>

<PAGE>


<TABLE>
<CAPTION>

<S>                                                                          <C>
13.  (a)  Load, fees, expenses, etc......................................... }  Estimated Current Return and
                                                                             }        Estimated Long-Term
                                                                             }        Return; Trust Operating
                                                                                      Expenses
     (b)  Certain information regarding periodic payment                     }        *
                certificates................................................ }
     (c)  Certain percentages............................................... }  Summary of Essential
                                                                             }        Information; Public Offering;
                                                                             }         Insurance on the Bonds
     (d)  Certain other fees, etc. payable by holders....................... }  Rights of Unitholders
     (e)  Certain profits receivable by depositor,
               principal, underwriters, writers, Trustee or
               affiliated person............................................ }  Trust Operating Expenses;
                                                                             }         Public Offering
     (f)  Ratio of annual charges to income................................. }        *

                                                                             }  The Fund
14.  Issuance of Trust's securities......................................... }  Rights of Unitholders
15.  Receipt and handling of payments from purchasers....................... }        *
16.  Acquisition and disposition of underlying                               }  The Fund; Investment Objectives and Portfolio
           securities....................................................... }       Selection; Trust Administration; Public
                                                                             }       Offering
                                                                             }
17.  Withdrawal or redemption............................................... }  Rights of Unitholders; Public Offering
                                                                             }
18.  (a)  Receipt, custody and disposition of income........................ }  Rights of Unitholders
     (b)  Reinvestment of distributions..................................... }  Rights of Unitholders
     (c)  Reserves or special Trusts........................................ }  Trust Operating Expenses
     (d)  Schedule of distributions......................................... }        *

19.  Records, accounts and reports.......................................... }  Rights of Unitholders; Trust
                                                                             }         Administration
20.  Certain miscellaneous provisions of Trust agreement
     (a)  Amendment......................................................... }  Trust Administration
     (b)  Termination....................................................... }        *
     (c)  and (d) Trustee, removal and successor............................ }  Trust Administration
     (e) and (f) Depositor, removal and successor........................... }  Trust Administration
21.  Loans to security holders                                               }        *
22.  Limitations on liability............................................... }  Trust Administration
23.  Bonding arrangements................................................... }        *
24.  Other material provisions of Trust agreement........................... }        *

                        III. ORGANIZATION, PERSONNEL AND
                         AFFILIATED PERSONS OF DEPOSITOR

25.  Organization of depositor.............................................. }  Trust Administration

</TABLE>

<PAGE>


<TABLE>
<CAPTION>

<S>                                                                          <C>
26.  Fees received by depositor............................................. }  See Items 13(a) and 13(e)
27.  Business of depositor.................................................. }  Trust Administration
28.  Certain information as to officials and
           affiliated persons of depositor.................................. }  Trust Administration
29.  Voting securities of depositor......................................... }        *
30.  Persons controlling depositor.......................................... }        *
31.  Payment by depositor for certain services
           rendered to Trust................................................ }        *
32.  Payment 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....................................... }        *

                         IV. DISTRIBUTION AND REDEMPTION

35.  Distribution of Trust's securities by states........................... }  Public Offering
36.  Suspension of sales of Trust's securities.............................. }        *
37.  Revocation of authority to distribute.................................. }        *
38.  (a)  Method of Distribution............................................ }  Public Offering
     (b)  Underwriting Agreements........................................... }  Underwriting
     (c)  Selling Agreements................................................ }  Public Offering
39.  (a)  Organization of principal underwriters............................ }  Trust Administration
     (b)  N.A.S.D. membership of principal underwriters..................... }        *
40.  Certain fees received by principal underwriters........................ }  See Items 13(a) and 13(e)
41.  (a)  Business of principal underwriters................................ }  Trust Administration
     (b)  Branch offices of principal underwriters.......................... }        *
     (c)  Salesmen of principal underwriters................................ }        *
42.  Ownership of Trust's securities by certain persons..................... }        *
43.  Certain brokerage commissions received by
           principal underwriters........................................... }  Public Offering
44.  (a)  Method of valuation............................................... }  Public Offering
     (b)  Schedule as to offering price..................................... }        *
     (c)  Variation in offering price to certain persons.................... }  Public Offering
45.  Suspension of redemption rights........................................ }  Rights of Unitholders
46.  (a)  Redemption valuation.............................................. }  Public Offering
     (b)  Schedule as to redemption price................................... }        *
47.  Maintenance of position in underlying securities....................... }  Public Offering
                                                                             }  Rights of Unitholders

                      V. INFORMATION CONCERNING THE TRUSTEE
                                  OR CUSTODIAN

48.  Organization and regulation of Trustee................................. }  Trust Administration
49.  Fees and expenses of Trustee........................................... }  Trust Operating Expenses

</TABLE>

<PAGE>


<TABLE>
<CAPTION>


<S>                                                                          <C>
50.  Trustee's lien......................................................... }        *

                     VI. INFORMATION CONCERNING INSURANCE OF
                              HOLDERS OF SECURITIES

51.  Insurance of holders of Trust's securities............................. }  Cover Page; Trust Operating
                                                                             }   Expenses; Insurance on the
                                                                             }   Bonds

                            VII. POLICY OF REGISTRANT

52.  (a)  Provisions of Trust agreement with respect
           to selection or elimination...................................... }  The Fund; Trust Administration
     (b)  Transactions involving elimination of
           underlying securities............................................ }        *
     (c)  Policy regarding substitution or elimination
           of underlying securities......................................... }  The Fund; Trust Administration
     (d)  Fundamental policy not otherwise covered.......................... }        *
53.  Tax status of Trust.................................................... }  Tax Status

                   VIII. FINANCIAL AND STATISTICAL INFORMATION

54.  Trust's securities during last ten years............................... }        *
55   Certain information regarding periodic payment
thru       certificates..................................................... }        *
58.
59.  Financial statements (Instruction 1(c) to Form S-6).................... }        *

</TABLE>

- -------------
*Inapplicable, answer negative or not required.

<PAGE>


                   DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13
OREGON INSURED SERIES 7                                NATIONAL INSURED SERIES 5

     THE FUND. Delaware Group Tax-Exempt Trust, Series 13 (the "Fund") consists
of the underlying separate unit investment trusts set forth above. The various
trusts are collectively referred to herein as the "Trusts." Oregon Insured
Series 7 is referred to herein as the "Insured State Trust" or as the "Oregon
Trust." National Insured Series 5 is referred to herein as the "Insured
National Trust." Collectively, the Insured State Trust and the Insured National
Trust may be referred to herein as the "Insured Trusts." Each Trust initially
consists of interest-bearing obligations (including delivery statements
relating to contracts for the purchase of certain such obligations and an
irrevocable letter of credit) issued by or on behalf of states and territories
of the United States and political subdivisions and authorities thereof, the
interest on which is, with certain exceptions, in the opinion of recognized
bond counsel to the issuing governmental authorities, exempt from all Federal
income taxes under existing law (the "Bonds"). In addition, the interest income
of each Insured State Trust is, in the opinion of counsel, exempt to the extent
indicated from state and local taxes when held by residents of the state where
the issuers of Bonds in such Insured State Trust are located. Investors should
consult their tax advisers to determine the extent to which such interest
income is exempt from taxation in their state of residence. Capital gains, if
any, are subject to Federal and state tax. All Bonds in the Insured Trusts have
insurance guaranteeing the payments of principal and interest, when due, or are
escrowed to maturity. All such insurance remains effective so long as the Bonds
are outstanding. IT SHOULD BE NOTED THAT THE INSURANCE RELATES ONLY TO THE
BONDS IN AN INSURED TRUST AND NOT TO THE UNITS OFFERED HEREBY OR TO THE MARKET
VALUE THEREOF. As a result of such insurance or escrow, the Bonds of each
Insured Trust are rated "AAA" by Standard & Poor's, a division of The
McGraw-Hill Companies, Inc. ("Standard & Poor's") and/or "Aaa" by Moody's
Investors Service, Inc. ("Moody's"). Both Standard & Poor's and Moody's have
indicated that their respective rating is not a recommendation to buy, hold or
sell Units nor does it take into account the extent to which expenses of an
Insured Trust or sales by an Insured Trust of Bonds for less than the purchase
price paid by such Trust will reduce payment to Unitholders of the interest and
principal required to be paid on such Bonds. See "Insurance on the Bonds in the
Insured Trusts." No representation is made as to any insurer's ability to meet
its commitments. Certain of the Bonds in certain of the Trusts may have been
acquired at prices which resulted in such Bonds being purchased at a discount
from the aggregate par value of such Bonds. Gains based upon the difference, if
any, between the value of such Bonds at maturity, redemption or sale and their
purchase price at a discount (plus earned original issue discount) may
constitute taxable ordinary income with respect to a Unitholder who is not a
dealer with respect to his Units.

     INVESTMENT OBJECTIVES OF THE FUND. The objectives of the Fund are to gain
interest income exempt from Federal income tax and, in the case of the Insured
State Trust, Federal and state income tax (if any) and conservation of capital
through an investment in diversified portfolios of Federal and state tax-exempt
obligations. The Trusts may be an appropriate investment vehicle for investors
who desire to participate in a portfolio of tax-exempt fixed income securities
with greater diversification than they might be able to acquire individually.
In addition, securities of the type deposited in the Trusts are often not
available in small amounts. There is, of course, no guarantee that the Trusts
will achieve their objectives. The payment of interest and the preservation of
principal are dependent upon the continuing ability of the issuers and/or
obligors of the Bonds and of the insurers thereof to meet their respective
obligations.

     UNITS OF THE TRUSTS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
ENDORSED BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY
THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY
OTHER AGENCY AND INVOLVE INVESTMENT RISK, INCLUDING LOSS OF PRINCIPAL.
- --------------------------------------------------------------------------------
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.

The investor is advised to read and retain this Prospectus for future reference.

                 THE DATE OF THIS PROSPECTUS IS JANUARY 22, 1998

<PAGE>


     PUBLIC OFFERING PRICE. The Public Offering Price of the Units of each
Trust during the initial offering period is equal to the aggregate offering
price of the Bonds in such Trust's portfolio and cash, if any, in the Principal
Account held or owned by such Trust divided by the number of Units outstanding,
plus the applicable sales charge and accrued interest, if any. For sales
charges in the secondary market, see "Public Offering -- General." If the Bonds
in each Trust were available for direct purchase by investors, the purchase
price of the Bonds would not include the sales charge included in the Public
Offering Price of the Units. During the initial offering period, the sales
charge is reduced on a graduated scale for sales involving $100,000 or more. If
Units were available for purchase at the opening of business on the Initial
Date of Deposit, the Public Offering Price per Unit would have been that amount
set forth in the "Summary of Essential Financial Information." See "Public
Offering."

     ESTIMATED CURRENT RETURN AND ESTIMATED LONG-TERM RETURN. The Estimated
Current Return and Estimated Long-Term Return to Unitholders are as set forth
under "Summary of Essential Financial Information." The methods of calculating
Estimated Current Return and Estimated Long-Term Return are set forth under
"Estimated Current Return and Estimated Long-Term Return."

     DISTRIBUTIONS. Unitholders will receive distributions on a monthly basis.
See "Rights of Unitholders -- Distributions of Interest and Principal." Record
dates will be the first day of each month. Distributions will be made on the
fifteenth day of the month subsequent to the respective record dates.

     MARKET FOR UNITS. Although not obligated to do so, an affiliate of the
Sponsor, Delaware Distributors, L.P., intends to, and certain of the other
Underwriters may, maintain a secondary market for the Units at prices based
upon the aggregate bid price of the Bonds in the portfolio of a Trust; however,
during the initial offering period such prices will be based upon the aggregate
offering prices of the Bonds. If such a market is not maintained and no other
over-the-counter market is available, a Unitholder will be able to dispose of
his Units through redemption at prices based upon the bid prices of the
underlying Bonds (see "Rights of Unitholders -- Redemption of Units").

     REINVESTMENT OPTION. Unitholders have the opportunity to have their
distributions reinvested or redemption proceeds exchanged into open-end
management investment companies advised by its Sponsor and its affiliates as
described under "Rights of Unitholders -- Reinvestment Option."

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

                                       2

<PAGE>


                   DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13

                   SUMMARY OF ESSENTIAL FINANCIAL INFORMATION
 AS OF THE OPENING OF BUSINESS ON THE INITIAL DATE OF DEPOSIT: JANUARY 22, 1998
                   SPONSOR: DELAWARE MANAGEMENT COMPANY, INC.
                    DISTRIBUTOR: DELAWARE DISTRIBUTORS, L.P.
                       EVALUATOR: MULLER DATA CORPORATION
                        TRUSTEE: THE CHASE MANHATTAN BANK

<TABLE>
<CAPTION>
                                                                           OREGON            NATIONAL
                                                                           INSURED           INSURED
                                                                           SERIES 7          SERIES 5
                                                                         -------------     -------------
<S>                                                                      <C>               <C>
Principal Amount (Par Value) of Bonds ................................    $  1,500,000      $  1,970,000
Number of Units ......................................................         154,434           202,591
Fractional Undivided Interest in the Trust per Unit ..................       1/154,434         1/202,591
Principal Amount (Par Value) of Bonds per Unit (1) ...................    $    9.713        $    9.724
Public Offering Price:
 Aggregate Offering Price of Bonds in Portfolio ......................    $  1,468,672      $  1,926,646
 Aggregate Offering Price of Bonds per Unit ..........................    $    9.51         $    9.51
 Sales Charge 4.9% (5.152% of the Aggregate Offering
  Price of the Bonds) per Unit (2) ...................................    $    0.49         $    0.49
 Public Offering Price per Unit (2)(3) ...............................    $   10.00         $   10.00
Redemption Price per Unit (3)(4) .....................................    $    9.45         $    9.45
Sponsor's Initial Repurchase Price per Unit ..........................    $    9.51         $    9.51
Excess of Public Offering Price per Unit Over Redemption Price per
 Unit ................................................................    $    0.55         $    0.55
Excess of Sponsor's Initial Repurchase Price per Unit Over
 Redemption Price per Unit ...........................................    $    0.06         $    0.06
Minimum Value of the Trust under which Trust Agreement may be
 terminated ..........................................................    $    300,000      $    394,000
Minimum Principal Distribution ........................ $0.01 per Unit
First Settlement Date ............................... January 27, 1998
Mandatory Termination Date ......................... December 31, 2045
Calculation of Estimated Net Annual Unit Income: (7)
 Estimated Annual Interest Income per Unit ...........................    $    0.45330      $    0.48312
 Less: Estimated Annual Expense per Unit .............................    $    0.03072      $    0.02864
                                                                          ------------      ------------
 Estimated Net Annual Interest Income per Unit .......................    $    0.42258      $    0.45448
Estimated Normal Monthly Distribution per Unit (5) ...................    $    0.03522      $    0.03787
Estimated Daily Rate of Net Interest
 Accrual per Unit ....................................................    $    0.00117      $    0.00126
Estimated Current Return Based on Public
 Offering Price (2)(5)(6) ............................................         4.23   %          4.54   %
Estimated Long-Term Return (2)(5)(6) .................................         3.88   %          4.55   %
Initial Distribution (February 15, 1998) .............................    $    0.00470      $    0.00505
Trustee's Initial Annual Fee per $1,000 Principal Amount of Bonds (7)     $    1.26         $    1.26
Evaluator's Fee per Evaluation (8) ...................................    $    8.00         $    8.00
Maximum Annual Supervisory Fee per Unit (9) ..........................    $    0.00400      $    0.00400
Estimated Organizational and Offering
 Expenses per Unit (10) ..............................................    $    0.05334      $    0.06745
Record Dates ................................. First day of each month
Distribution Dates ....................... Fifteenth day of each month
</TABLE>

                                       3

<PAGE>


     Evaluations for purpose of sale, purchase or redemption of Units are made
as of the close of the New York Stock Exchange (usually 4:00 P.M. Eastern time)
on days of trading on the New York Stock Exchange next following receipt of an
order for a sale or purchase of Units or receipt by the Trustee of Units
tendered for redemption.
- ---------------------
(1)  Because certain of the Bonds in certain Trusts may from time to time under
     certain circumstances be sold or redeemed or will be called or mature in
     accordance with their terms, there is no guarantee that the value of each
     Unit at the respective Trusts' termination will be equal to the Principal
     Amount (Par Value) of Bonds per Unit stated above.

(2)  The sales charge is decreased and the Estimated Current Return and
     Estimated Long-Term Return are increased for transactions entitled to a
     reduced sales charge. See "Public Offering -- General."

(3)  Anyone ordering Units for settlement after the First Settlement Date will
     pay accrued interest from such date to the date of settlement (normally
     three business days after order) less distributions from the Interest
     Account subsequent to the First Settlement Date. For purchases settling on
     the First Settlement Date, no accrued interest will be added to the Public
     Offering Price. After the initial offering period, the Sponsor's Repurchase
     Price per Unit will be determined as described under the caption "Public
     Offering -- Public Market."

(4)  See "Rights of Unitholders -- Redemption of Units."

(5)  These figures are based on estimated per Unit cash flows. Estimated cash
     flows will vary with changes in fees and expenses, with changes in current
     interest rates and with the principal prepayment, redemption, maturity,
     call, exchange or sale of the underlying Bonds. The estimated cash flows
     for each Trust are available upon request at no charge from the Sponsor.

(6)  See "Estimated Current Return and Estimated Long-Term Return" for
     information concerning the calculation of both Estimated Current Returns
     and Estimated Long-Term Returns.

(7)  During the first year the Trustee will reduce its fee in the Oregon Trust
     and the National Trust by approximately $0.343 and $0.379 per 100 Units,
     respectively, (which amount is the estimated interest to be earned per Unit
     prior to the expected delivery date for the "when, as and if issued" Bonds
     included in such Trusts). Should such estimated interest exceed such
     amount, the Trustee will reduce its fee up to its annual fee. After the
     first year, the Trustee's fee will be that amount indicated above;
     Estimated Annual Interest Income per Unit, Estimated Annual Expense per
     Unit, and Estimated Net Annual Interest Income per Unit will remain the
     same as shown. See "Estimated Current Return and Estimated Long-Term
     Return."

(8)  For the first two months of the offering period the Evaluator has agreed to
     waive its fee. Such fee reduction will be used to offset organizational and
     offering costs.

(9)  The Supervisory Fee is payable to the Sponsor. In addition, the Sponsor
     will be reimbursed by the Trust for bookkeeping and administrative expenses
     currently at a maximum annual rate of $0.010 per 100 units.

(10) Each Trust (and therefore the Unitholders of the respective Trust) will
     bear all or a portion of its organizational and offering costs (including
     costs of preparing the registration statement, the trust indenture and
     other closing documents, registering Units with the Securities and Exchange
     Commission and states, the initial audit of the Trust portfolios and the
     initial fees and expenses of the Trustee but not including the expenses
     incurred in the preparation and printing of brochures and other advertising
     materials and any other selling expenses) as is common for mutual funds.
     Total organizational and offering expenses will be charged off at the end
     of the initial offering period which is currently expected to be
     approximately 4-6 months from the Initial Date of Deposit. In order to
     reimburse the Trustee for organizational and offering costs, the Sponsor
     may have to sell Securities from the Trusts. The sale of Securities will
     serve to reduce the Principal Amount (Par Value) of Bonds per Unit stated
     above. See "Trust Operating Expenses" and "Statements of Net Assets."
     Historically, the sponsors of unit investment trusts have paid all of the
     costs of establishing such trusts.

                                       4

<PAGE>


THE FUND

     GENERAL. The Fund was created under the laws of the State of New York
pursuant to a Trust Agreement (the "Trust Agreement"), dated the Initial Date
of Deposit, as defined in "Summary of Essential Financial Information," with
Delaware Management Company, Inc., as Sponsor, Muller Data Corporation, as
Evaluator, and The Chase Manhattan Bank, as Trustee.

     The Fund consists of two separate unit investment trusts, each having a
portfolio of interest-bearing obligations (including delivery statements
relating to contracts for the purchase of certain such obligations) issued by
or on behalf of states and territories of the United States, and political
subdivisions and authorities thereof, the interest on which is, in the opinion
of recognized bond counsel to the issuing governmental authorities, exempt from
all Federal income taxes under existing law. All issuers of Bonds in an Insured
State Trust are located in the State for which such Trust is named or in United
States territories or possessions and their public authorities; consequently,
in the opinion of counsel, the related interest earned on such Bonds is exempt
to the extent indicated from state and local taxes of such State or territory.
In addition, in the case of the Insured National Trust, interest income may
also be exempt from certain state and local taxes for residents of various
states. Illinois, Indiana, Virginia and Washington residents may only purchase
units of an Insured National Trust by this Prospectus. On the Initial Date of
Deposit, the Sponsor deposited with the Trustee the Bonds indicated under the
"Schedule of Investments" for each Trust herein, including delivery statements
relating to contracts for the purchase of certain such obligations and an
irrevocable letter of credit issued by a financial institution in the aggregate
amount required for such purchases (the "Bonds"). Thereafter, the Trustee, in
exchange for the Bonds so deposited, delivered to the Sponsor evidences of
ownership of the number of Units of each Trust as indicated under "Summary of
Essential Financial Information."

     With the deposit of the Bonds on the Initial Date of Deposit, the Sponsor
established a percentage relationship between the amounts of Bonds in each
Trust's portfolio. From time to time following the Initial Date of Deposit, the
Sponsor, pursuant to the Trust Agreement, may deposit additional Bonds in a
Trust and Units may be continuously offered for sale to the public by means of
this Prospectus, resulting in a potential increase in the outstanding number of
Units of a Trust. Any additional Bonds deposited in a Trust will maintain, as
nearly as is practicable, the original proportionate relationship of the Bonds
in a Trust's portfolio. Since the prices of the underlying Bonds will fluctuate
daily, the ratio, on a market value basis, will also change daily. The portion
of Bonds represented by each Unit will not change as a result of the deposit of
additional Bonds in a Trust.

     Certain of the Bonds in certain of the Trusts may have been purchased on a
"when, as and if issued" or "delayed delivery" basis. See footnote (1) in "The
Trusts -- Notes to Schedules of Investments." The delivery of any such Bonds
may be delayed or may not occur. Interest on these Bonds begins accruing to the
benefit of Unitholders on their respective dates of delivery. To the extent any
Bonds are actually delivered to a Trust after their respective expected dates
of delivery, Unitholders who purchase their Units prior to the date such Bonds
are actually delivered to the Trustee would be required to adjust their tax
basis in their Units for a portion of the interest accruing on such Bonds
during the interval between their purchase of Units and the actual delivery of
such Bonds. As a result of any such adjustment, the Estimated Current Returns
during the first year would be slightly lower than those stated herein which
would be the returns after the first year, assuming the portfolio of a Trust
and estimated annual expenses other than those of the Trustee (which may be
reduced in the first year only) do not vary from that set forth under "Summary
of Essential Financial Information." Unitholders will be "at risk" with respect
to all Bonds in the portfolios including "when, as and if issued" and "delayed
delivery" Bonds (i.e., may derive either gain or loss from fluctuations in the
evaluation of such Bonds) from the date they commit for Units. For a discussion
of the Sponsor's obligations in the event of the failure of any contract for
the purchase of any of the Bonds and limited right to substitute other
tax-exempt bonds to replace any failed contract, see "Replacement Bonds" below.

                                       5

<PAGE>


     Each Unit initially offered represents the fractional undivided interest
in each Trust as indicated under "Summary of Essential Financial Information."
To the extent that any Units are redeemed by the Trustee, the fractional
undivided interest in a Trust represented by each unredeemed Unit will
increase, although the actual interest in such Trust represented by such
fraction will remain unchanged. Units will remain outstanding until redeemed
upon tender to the Trustee by Unitholders, which may include the Sponsor or the
Underwriters, or until the termination of the Trust Agreement.

     REPLACEMENT BONDS. Because certain of the Bonds in a Trust may from time
to time under certain circumstances be sold or redeemed or will mature in
accordance with their terms and because the proceeds from such events will be
distributed to Unitholders and will not be reinvested, no assurance can be
given that a Trust will retain for any length of time its present size and
composition. 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 securities purchased on a "when, as and if issued" basis
("Failed Bonds"), the Sponsor is authorized under the Trust Agreement to direct
the Trustee to acquire other securities ("Replacement Bonds") to make up the
original corpus of the affected Trust.

     The Replacement Bonds must be purchased within 20 days after delivery of
the notice of the failed contract and the purchase price (exclusive of accrued
interest) may not exceed the amount of funds reserved for the purchase of the
Failed Bonds. The Replacement Bonds shall (i) be tax-exempt bonds, issued by
states or territories of the United States or political subdivisions thereof
and 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, with fixed
maturity dates substantially the same as those of the Failed Bonds; (ii) be
purchased at a price that results in a yield to maturity and in a current
return, in each case as of the Initial Date of Deposit, at least equal to that
of the Failed Bonds; (iii) be payable in U.S. currency; (iv) not be when, as
and if issued bonds; (v) be rated at least "AAA" by Standard & Poor's and/or
"Aaa" by Moody's in the case of an Insured Trust and (vi) be insured by one of
the Insurers if such Bonds are purchased for an Insured Trust. Whenever a
Replacement Bond has been acquired for a Trust, the Trustee shall, within five
days thereafter, notify all Unitholders of such Trust of the acquisition of the
Replacement Bond and shall, on the next monthly distribution date which is more
than 30 days thereafter, make a pro rata distribution of the amount, if any, by
which the cost to the affected Trust of the Failed Bond exceeded the cost of
the Replacement Bond plus accrued interest. Once the original corpus of a Trust
is acquired, the Trustee will have no power to vary the investment of the
Trust; i.e., the Trust will have no managerial power to take advantage of
market variations to improve a Unitholder's investment.

     If the right of limited substitution described in the preceding paragraph
shall not be utilized to acquire Replacement Bonds in the event of a failed
contract, the Sponsor will refund the sales charge attributable to such Failed
Bonds to all Unitholders of the affected Trust and distribute the principal and
accrued interest (at the coupon rate of such Failed Bonds to the date the
Failed Bonds are removed from the Trust) attributable to such Failed Bonds not
later than the next Distribution Date following such removal or such earlier
time as the Trustee in its sole discretion deems to be in the interest of the
Unitholders. In the event a Replacement Bond should not be acquired by a Trust,
the estimated net annual interest income per Unit for the Trust would be
reduced and the Estimated Current Return and the Estimated Long-Term Return
thereon might be lowered. In addition, Unitholders should be aware that they
may not be able at the time of receipt of such principal to reinvest such
proceeds in other securities at a yield equal to or in excess of the yield
which such proceeds were earning to Unitholders in the affected Trust.

INVESTMENT OBJECTIVES AND PORTFOLIO SELECTION

     The objectives of the Fund are to gain interest income exempt from Federal
income tax and, in the case of an Insured State Trust, Federal and state income
taxation and to conserve capital through an

                                       6

<PAGE>


investment in diversified portfolios of Federal and state tax-exempt
obligations. There is, of course, no guarantee that the Trusts will achieve
their objectives. The Fund may be an appropriate investment vehicle for
investors who desire to participate in a portfolio of tax-exempt fixed income
securities with greater diversification than they might be able to acquire
individually. In addition, securities of the type deposited in the Fund are
often not available in small amounts.

     Insurance guaranteeing the timely payment, when due, of all principal and
interest on the Bonds in each Insured Trust has been obtained by the issuer of
such Bonds, by a prior owner of such Bonds or by the Sponsor prior to the
deposit of such Bonds in such Insured Trust from one of several insurance
companies (the "Insurers"). Certain Bonds may be escrowed to maturity. No
representation is made as to any Insurer's ability to meet its commitments. All
Bonds insured by an Insurer receive a "AAA" rating by Standard & Poor's and a
"Aaa" rating by Moody's. See "Description of Bond Ratings."

     In selecting Bonds for the Trusts the following factors, among others,
were considered by the Sponsor: (i) either the Standard & Poor's rating of the
securities was in no case less than AAA in the case of the Insured Trusts or
the Moody's rating of the Securities was in no case less than Aaa in the case
of the Insured Trusts including provisional or conditional ratings,
respectively, or, if not rated, the Securities had, in the opinion of the
Sponsor, credit characteristics sufficiently similar to the credit
characteristics of interest-bearing tax-exempt obligations that were so rated
as to be acceptable for acquisition by the Fund, (ii) whether the Bonds are
insured by an Insurer in the case of an Insured Trust, (iii) the prices of the
Bonds relative to other bonds of comparable quality and maturity, (iv) the
diversification of Bonds as to purpose of issue and location of issuer, and (v)
with respect to the Insured Trusts, the availability and cost of insurance for
the prompt payment of principal and interest, when due, on the Bonds.
Subsequent to the Initial Date of Deposit, a Bond may cease to be rated or its
rating may be reduced below either the applicable Standard & Poor's or Moody's
ratings set forth above or both. Neither event requires elimination of such
Bonds from the portfolio of a Trust but may be considered in the Sponsor's
determination as to whether or not to direct the Trustee to dispose of the
Bonds. See "Trust Administration -- Portfolio Administration."

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

THE TRUSTS

OREGON INSURED SERIES 7

     GENERAL. Oregon Insured Series 7 (the "Oregon Trust") consists of 6 issues
of Bonds. Two of the Bonds in the Oregon Trust are general obligations (46%) of
the governmental enities issuing them and are backed by the taxing power
thereof. The remaining issues are payable from the income of a specific project
or authority and are not supported by the issuer's power to levy taxes. These
issues are divided by purpose of issues (and percentage of principal amount to
total Oregon Trust) as follows: 6% Health Care Bonds, 48% Other Revenue Bonds.
No Bond has received a provisional rating. For a general description of certain
of the risks associated with the Bonds, see "Risk Factors" below.

                                       7

<PAGE>


     RISK FACTORS SPECIFIC TO OREGON. Similar to the nation as a whole,
economic growth in Oregon is likely to be restricted to its long-term trend
rate by near capacity labor markets and rising costs. Oregon's jobless rate is
unlikely to fall below its current 5.0% for any sustained period. This will
have the effect of limiting job growth to the rate of increase in the State's
labor force. The labor force is expected to increase sufficiently to keep
Oregon's employment growth well above the national average but not enough to
match the job growth rates of the 1994 to 1996 period. The State's tight labor
markets and expanding high technology industries should continue to push
Oregon's wages and per capita income up toward the national average.

     Oregon's personal income is forecast to increase 6.3% in 1997, down from
an estimated 7.9% in 1996 but still well above the national forecast of 5.0%
growth. Non-farm payroll employment is expected to increase 2.9% in 1997, more
than double the projected national rate of job growth.

     With the State's overall labor market near full capacity, job expansion
will become increasingly dependent on labor force growth. While the 18 to 24
year old segment of the population is expected to grow over the next five
years, the key to labor force expansion is the rate of net migration. Oregon
experienced rapid net in-migration over the 1990 to 1995 period averaging
40,700 per year. The state continues to be attractive to in-migrants, offering
low unemployment and rising relative wages. Moreover, California's unemployment
rate remains 2% above Oregon's rate. These factors should keep Oregon's
population growth well above the national average.

     Despite the attraction of Oregon's strong economy, the rate of net
in-migration is likely to slow for two reasons. First, California is well into
an economic recovery with job growth above the national average. This has
already slowed movement into Oregon. This trend can be expected to continue. A
second factor is Oregon's rising home prices. Oregon's conventional home repeat
price index increased 9.3% per year over the 1990 to 1995 period, the second
fastest growth rate among the states. Home prices are estimated to increase
8.9% in 1996, followed by a 7.9% projected increase in 1997. These increases
are making Oregon a relatively more expensive place to live. This will have the
effect of reducing the State's attractiveness to some potential in-migrants.

     The State's tight labor markets are expected to continue pushing Oregon's
wages toward the national average. Manufacturing wages grew an estimated 6.3%
in 1996 while private service wages increased 5.6%. In 1997, manufacturing
wages are projected to increase another 4.3% while private service wages rise
4.4%. Oregon's annual wages have increased from 89.8% of the national average
in 1993 to 92.9% in 1995. They are forecast to rise to 94.5% in 1997. Wage
growth is a key factor stimulating demand and retail sales in Oregon but it
also is a growing concern among Oregon businesses because higher wages mean
higher costs.

     It is the expanding high technology manufacturing sector that has been the
catalyst for the State's rapid growth over the 1994 to 1996 period. Though
slowing, high tech should continue to be the driving force behind growth in the
region stretching from the Portland Metropolitan area through Salem and
Corvallis to Eugene. High tech manufacturers are expected to add 2,300 jobs in
1997 with the overwhelming majority of them occurring in this region.

     The rest of the State will benefit from a generally healthy agriculture
sector (with the exception of the cattle industry), a stabilizing timber
harvest and increasing cost advantages relative to the Willamette Valley and
Portland metropolitan area. The statewide timber harvest is expected to be 4.2
billion board feet in 1997, matching the estimate for 1996. Although the
harvest is not expected to show further significant declines, it is forecast to
remain at extremely low levels relative to the post World War II

                                       8

<PAGE>


norm. Lumber and wood products jobs are forecast to decline only 1.4% in 1997
after decreasing an estimated 3.1% in 1996.

     The major components of personal income are expected to grow more slowly
in 1997 with the exception of dividend, interest and rent income and transfer
payments. Non-farm proprietor income is forecast to increase 4.3% in 1997, down
from an estimated 6.2% in 1996. Farm proprietor income is projected to drop 12%
in 1997 after jumping 29.8% in 1995 and 41% in 1996. Wage and salary income is
expected to increase 6.9% in 1997, after growing more than 9% in both 1995 and
1996.

     The forecast of rising short-term interest rates pushes up dividend,
interest and rent income 7.6% in 1997, compared to an estimated 5.2% growth
rate in 1996. Transfer payments are projected to increase 5.7% in 1997, up 0.2%
from the 1996 estimate.

     Construction employment is expected to show less growth in 1997 though it
is likely to remain at a high level of activity. After adding jobs at a double
digit rate each year from 1994 to 1996, construction industry employers are
forecast to expand payroll jobs only 4.1% in 1997. Housing starts are forecast
to drop 13.6%. While the forecast of 22,100 is below the housing start level
for 1994 through 1996, it is above every year between 1979 and 1994.

     Overall manufacturing employment is forecast to increase 0.3% in 1997
after averaging 3.0% growth for the 1994 to 1996 period. The expanding high
tech sector is likely to make it increasingly difficult for other manufacturers
to find skilled labor at wages consistent with their competitive position.
Metals employment is expected to decline 0.7% while transportation equipment
manufacturing job growth drops from 4.0% in 1996 to 1.1% in 1997. Nondurable
goods manufacturers are projected to reduce employment 1.3% in 1997, in line
with the estimated 1996 decrease. Mining employment is forecast to inch up 0.8%
after jumping 10.2% in 1996.

     The State's service-producing sectors are expected to continue growing but
they too are likely to be constrained by labor availability. Jobs in the
State's largest sector, non-health services, are expected to grow 5.7%, down
from 8.1% in 1996. A similar slowing trend is also expected for retail and
wholesale trade which are projected to increase 2.6% and 3.8% in 1997,
respectively. Health service employment is forecast to rise 3.4% while
financial service jobs are projected to expand 2.3%. Job growth rates of 2.1%
in transportation services and 1.4% in communications and utilities are
anticipated in 1997.

     The government sector in Oregon is forecast to continue shrinking relative
to the overall economy. Overall government jobs are projected to increase 1.7%
in 1997, marking the sixth consecutive year win which public sector jobs have
grown more slowly than private sector jobs. Federal government employment is
expected to decline for the fifth year in a row, dipping 1.7%. State government
jobs are projected to increase 2.8% while local government jobs (which include
tribal employment) increase 1.9%.

     General Fund revenue is projected to be $8,145.7 million for the 1997-99
biennium. The beginning balance is estimated to be $536.3 million for a total
General Fund resource estimate of $8,682 million. The December 1997-99 General
Fund revenue estimate is $115.1 million higher than the September forecast
despite the anticipation of a larger 2% surplus kicker refund. The overall
General Fund resource projection is $243.8 million more than the September
forecast.

     General Fund revenue growth is expected to slow to 10.1% in the 1997-99
biennium, down from an estimated 13.2% in 1995-97. Removing the effects of the
2% surplus kicker refunds from both biennia shows General Fund revenue growth
of 10.3% in 1997-99 compared to 18.3% in 1995-97. The expectation of slower
economic growth and changes in tax law are the primary reasons for the
declining rate of increase.

                                       9

<PAGE>


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

     STATE TAXATION. For a discussion of the Federal tax status of income
earned on Oregon Trust Units, see "Tax Status."

     The assets of the Oregon Trust will consist of interest-bearing
obligations issued by or on behalf of the State of Oregon (the "State") or
counties, municipalities, authorities or political subdivisions thereof (the
"Oregon Bonds") or by the Commonwealth of Puerto Rico, Guam and the United
States Virgin Islands (the "Possession Bonds") (collectively, the "Bonds").
Neither the Sponsor nor its counsel have independently examined the Bonds to be
deposited in and held in the Oregon Trust. However, although no opinion is
expressed herein regarding such matters, it is assumed that: (i) the Bonds were
validly issued; (ii) the interest thereon is excludable from gross income for
Federal income tax purposes; and (iii) interest on the Bonds, if received
directly by an Oregon Unitholder, would be exempt from the Oregon income tax
applicable to individuals (the "Oregon Personal Income Tax").

     In the opinion of Chapman and Cutler, counsel to the Sponsor, under
existing Oregon law and based on the assumptions set forth above:

     1. The Oregon Trust is not an association taxable as a corporation and
based upon an administrative rule of the Oregon State Department of Revenue,
each Oregon Unitholder of the Oregon Trust will be essentially treated as the
owner of a pro rata portion of the Oregon Trust and the income of such portion
of the Oregon Trust will be treated as the income of the Oregon Unitholder for
Oregon Personal Income Tax purposes;

     2. Interest on the Bonds which is exempt from the Oregon Personal Income
Tax when received by the Oregon Trust, and which would be exempt from the
Oregon Personal Income Tax if received directly by an Oregon Unitholder, will
retain its status as exempt from such tax when received by the Oregon Trust and
distributed to an Oregon Unitholder;

     3. To the extent that interest derived from the Oregon Trust by an Oregon
Unitholder with respect to the Possession Bonds is excludable from gross income
for Federal income tax purposes and is exempt from state tax pursuant to 48
U.S.C. Section 745, 48 U.S.C. Section 1423a and 48 U.S.C. Section 1403, such
interest will not be subject to the Oregon Personal Income Tax.

     4. Each Oregon Unitholder of the Oregon Trust will recognize gain or loss
for Oregon Personal Income Tax purposes if the Trustee disposes of a bond
(whether by redemption, sale or otherwise) or if the Oregon Unitholder redeems
or sells Units of the Oregon Trust to the extent that such a transaction
results in a recognized gain or loss to such Oregon Unitholder for Federal
income tax purposes; and

     5. The Oregon Personal Income Tax does not permit a deduction of interest
paid or incurred on indebtedness incurred or continued to purchase or carry
Units in the Oregon Trust, the interest on which is exempt from such Tax.

     Chapman and Cutler has expressed no opinion with respect to taxation under
any other provision of Oregon law. Ownership of the Units may result in
collateral Oregon tax consequences for certain taxpayers including, but not
limited to, the calculation of "net pension income" tax credit for retirees and

                                       10

<PAGE>


the applicability of other Oregon taxes. Prospective investors should consult
their tax advisers as to the applicability of any such collateral consequences.

     Chapman and Cutler has not examined any of the Bonds to be deposited and
held in the Oregon Trust or the proceedings for the issuance thereof or the
opinions of bond counsel with respect thereto and therefore it expresses no
opinion as to the exemption from the Oregon Personal Income Tax of interest on
the Bonds if received directly by an Oregon Unitholder. In addition,
prospective purchasers subject to the Oregon corporate income tax should be
advised that for purposes of the Oregon Corporate Income (Excise) Tax, interest
on the Oregon Bonds received by the Oregon Trust and distributed to an Oregon
Unitholder subject to such tax will be added to the corporate Oregon
Unitholder's Federal taxable income and therefore will be taxable. No opinion
is expressed as to the treatment of interest on any Possession Bonds included
in the Oregon Trust for purposes of the Oregon Corporate Income (Excise) Tax.
No opinion is expressed regarding the Oregon taxation of foreign or domestic
insurance companies.

NATIONAL INSURED SERIES 5

     GENERAL. National Insured Series 5 (the "National Trust") consists of 9
issues of Bonds all issued by entities located in 8 states. One of the Bonds in
the National Trust is a general obligation (2%) of the governmental entity
issuing it and is backed by the taxing power thereof. The remaining issues are
payable from the income of a specific project or authority and are not supported
by the issuer's power to levy taxes. These issues are divided by purpose of
issues (and percentage of principal amount to total National Trust) as follows:
15% Health Care Revenue Bonds, 76% Other Revenue Bonds and 7% Utility Revenue
Bonds. No Bond has received a provisional rating. For a general description of
certain of the risks associated with the Bonds, see "Risk Factors" below.

     FEDERAL TAXATION. For a discussion of the Federal tax status of income
earned on National Trust Units, see "Tax Status."

                                       11

<PAGE>


                         REPORT OF INDEPENDENT AUDITORS


     TO THE SPONSOR, TRUSTEE AND THE UNITHOLDERS OF DELAWARE GROUP TAX-EXEMPT
TRUST, SERIES 13:

     We have audited the accompanying statements of net assets, including the
schedules of investments, of Delaware Group Tax-Exempt Trust, Series 13
(comprised of the Oregon Insured Series 7 and National Insured Series 5) as of
the opening of business on January 22, 1998. The statements of net assets are
the responsibility of the Trust's Sponsor. Our responsibility is to express an
opinion on these statements of net assets based on our audit.

     We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the statements of net assets are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the statements of net assets. Our
procedures included confirmation of the irrevocable letter of credit held by
the Trustee and deposited in the Trust on January 22, 1998. An audit also
includes assessing the accounting principles used and significant estimates
made by the Sponsor, as well as evaluating the overall presentation of the
statements of net assets. We believe our audit provides a reasonable basis for
our opinion.

     In our opinion, the statements of net assets referred to above present
fairly, in all material respects, the financial position of each of the
respective series constituting the Delaware Group Tax-Exempt Trust, Series 13
at the opening of business on January 22, 1998, in conformity with generally
accepted accounting principles.



                                        ERNST & YOUNG LLP

Philadelphia, Pennsylvania
January 22, 1998

                                       12

<PAGE>

                   DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13
                            STATEMENTS OF NET ASSETS

                  AS OF THE OPENING OF BUSINESS ON THE INITIAL
                        DATE OF DEPOSIT: JANUARY 22, 1998

<TABLE>
<CAPTION>
                                                                OREGON         NATIONAL
                                                                INSURED        INSURED
                                                                SERIES 7       SERIES 5
                                                               ----------     ----------
<S>                                                           <C>            <C>
Investments in securities (1)(2) ..........................    $  492,525     $1,124,401
Contracts to purchase securities (1)(2) ...................       976,147        802,245
Accrued interest on underlying securities (1)(3) ..........         7,443          9,468
Organizational and offering Costs (4) .....................         8,238         13,665
                                                               ----------     ----------
Total Assets  .............................................    $1,484,353     $1,949,779
Less: distributions payable (3) ...........................         7,443          9,468
Less: accrued organizational and offering costs (4) .......         8,238         13,665
                                                               ----------     ----------
Net Assets ................................................    $1,468,672     $1,926,646
                                                               ==========     ==========
Net Assets Represented By:
 Interest of Unitholders --
 Units of fractional undivided interest
 outstanding: (154,434 and 202,591 Units, respectively)
Cost to investors (5) .....................................    $1,544,344     $2,025,915
Less: Gross underwriting commission (5) ...................        75,672         99,269
                                                               ----------     ----------
Net Assets (5) ............................................    $1,468,672     $1,926,646
                                                               ==========     ==========
</TABLE>

- -------------------
(1)  The aggregate value of the Bonds listed under "Schedule of Investments" for
     each Trust herein and their cost to such Trust are the same. The value of
     the Bonds is determined by Muller Data Corporation on the bases set forth
     under "Public Offering -- Offering Price." The contracts to purchase
     securities are collateralized by an irrevocable letter of credit which has
     been deposited with the Trustee in and for the following amounts:

<TABLE>
<CAPTION>
                                                             PRINCIPAL       OFFERING
                                                             AMOUNT OF       PRICE OF       ACCRUED INTEREST
                                          AMOUNT OF         BONDS UNDER     BONDS UNDER       TO EXPECTED
                                       LETTER OF CREDIT      CONTRACTS       CONTRACTS       DELIVERY DATES
                                       ----------------     -----------     -----------     ----------------
<S>                                       <C>                <C>             <C>                <C>
   Oregon Insured Series 7 .........       $2,500,000         $955,000        $976,147           $2,842
   National Insured Series 5 .......       $3,500,000         $830,000        $802,245           $3,972
</TABLE>

(2)  Insurance coverage providing for the timely payment of principal and
     interest on the Bonds in the portfolio of each Insured Trust has been
     obtained by the issuer of the Bond, the underwriter of such Bond, the
     Sponsor or others. See "Schedule of Investments."

(3)  The Trustee will advance the amount of accrued interest as of January 27,
     1998 (the "First Settlement Date"), and all accrued interest to the First
     Settlement Date will be distributed to the Sponsor as the Unitholder of
     record as of the First Settlement Date.

(4)  The Trusts (and therefore Unitholders) will bear all or a portion of their
     organizational and offering costs, which will be deferred and charged off
     against principal at the end of the initial offering period.

(5)  The aggregate public offering price (exclusive of interest) and the
     aggregate sales charge are computed on the bases set forth under "Public
     Offering -- Offering Price" and "Public Offering -- Sponsor and Underwriter
     Compensation" and assume all single transactions involve less than
     $100,000. For single transactions involving $100,000 or more, the sales
     charge is reduced (see "Public Offering -- General") resulting in an equal
     reduction in both the Cost to investors and the Gross underwriting
     commission while the Net Assets remains unchanged.

                                       13

<PAGE>


                             OREGON INSURED SERIES 7

                             SCHEDULE OF INVESTMENTS
                  AS OF THE OPENING OF BUSINESS ON THE INITIAL
                        DATE OF DEPOSIT: JANUARY 22, 1998

<TABLE>
<CAPTION>
                   NAME OF ISSUER, TITLE, INTEREST RATE AND                                        OFFERING PRICE
  AGGREGATE        MATURITY DATE OF EITHER BONDS DEPOSITED                       REDEMPTION          TO OREGON
PRINCIPAL (1)           OR BONDS CONTRACTED FOR (1)(5)         RATING (2)        FEATURE (3)         TRUST (4)
- --------------    -----------------------------------------    ----------     ----------------     --------------
<S>              <C>                                          <C>            <C>                    <C>
  $  200,000      City of Portland, Oregon, Sewer System       AAA            2007@100               $  203,675
                  Revenue Refunding Bonds, Series
                  1997A, (FGIC Insured), 5.00%, Due
                  06/01/2014

      95,000      Oregon Health Sciences University,           AAA            [email protected] S.F.           29,935
                  Insured Revenue Bonds, Series 1995A,
                  (MBIA Insured), 0.00%, Due
                  07/01/2021(6)

     250,000      Multnomah County, Oregon,                    AAA            2007@102                  258,915
                  Educational Facilities, University of
                  Portland Project Revenue Bonds,
                  (AMBAC Insured), 5.10%, Due
                  04/01/2013

     315,000      Clackamas Community College District,        AAA            2006@100                  338,395
                  Clackamas County, Oregon, Full Faith                        2017@100 S.F.
                  and Credit Obligations, Series 1996,
                  (MBIA Insured), 5.80%, Due
                  06/01/2026

     270,000      Umitilla School District Number 8,           AAA                                      267,308
                  Revenue Bonds, (FSA Insured), 4.50%,
                  Due 12/01/2013**

     370,000      Washington County, Oregon, School            AAA                                      370,444
                  District Number Fifteen, Forest Grove,
                  General Obligation Refunding Bonds,
                  Series 1998, (FSA Insured), 4.55%, Due
                  06/01/2012
  ----------                                                                                         ----------

  $1,500,000                                                                                         $1,468,672
  ==========                                                                                         ==========
</TABLE>

For an explanation of footnotes used on this page, see "Notes to Schedule of
Investments" on page 16.

                                       14

<PAGE>


                            NATIONAL INSURED SERIES 5

                             SCHEDULE OF INVESTMENTS
                  AS OF THE OPENING OF BUSINESS ON THE INITIAL
                        DATE OF DEPOSIT: JANUARY 22, 1998

<TABLE>
<CAPTION>
                 NAME OF ISSUER, TITLE, INTEREST RATE AND                                      OFFERING PRICE
 AGGREGATE        MATURITY DATE OF EITHER BONDS DEPOSITED                       REDEMPTION      TO NATIONAL
 PRINCIPAL            OR BONDS CONTRACTED FOR (1)(5)           RATING (2)      FEATURE (3)       TRUST (4)
- ------------   -------------------------------------------     -----------    --------------   --------------
<S>           <C>                                             <C>            <C>                   <C>
$  500,000     Massachusetts Turnpike Authority,               AAA            2007@102           $  489,700
               Metropolitan Highway System Revenue                            2030@100 S.F.
               Bonds, Series A, (MBIA Insured), 5.00%,
               Due 01/01/2037

   250,000     Matagorda County, Texas, Navigation             AAA            2008@102              250,000
               District Number One, Revenue Refunding
               Bonds, Series 1998B, (MBIA Insured)
               5.15%, Due 11/01/2029

   150,000     Jefferson County, Kentucky, Health              AAA            2007@101              150,000
               Facilities Revenue Bonds, Alliant Health                       2018@100 S.F.
               Systems, Inc., Series 1997, (MBIA
               Insured), 5.125%, Due 10/01/2027

   140,000     Bayonne Municipal Utilities Authority,          AAA            2008@100              139,308
               (Hudson County, New Jersey), Water
               System Revenue Bonds, Series 1997,
               (MBIA Insured), 5.00%, Due 01/01/2028

   250,000     Upper Occoquan Sewage Authority,                AAA            2006@102              247,500
               Virginia, Regional Sewerage System                             2021@100 S.F.
               Revenue Bonds, Series 1995A, (MBIA
               Insured), 5.00%, Due 07/01/2025

   150,000     Doylestown Hospital Authority,                  AAA            2008@102              147,375
               Commonwealth of Pennsylvania,
               Doylestown Hospital Revenue Bonds,
               Series 1998A, (AMBAC Insured), 5.00%,
               Due 07/01/2028**

   250,000     Marion County Convention and                    AAA            2008@101              245,393
               Recreational Facilities Authority, Indiana,                    2023@100 S.F.
               Excise Taxes Lease Rental Revenue
               Subordinate Bonds, Series 1997A, (MBIA
               Insured), 5.00%, Due 06/01/2027

   250,000     Brazos River Authority, Texas, Revenue          AAA            2008@102              250,000
               Refunding Bonds, (Houston Industries
               Incorporated Project), Series 1998A,
               (AMBAC Insured), 5.125%, Due
               05/01/2019**

    30,000     City of Bellevue, King County,                  AAA                                    7,370
               Washington Limited Tax Levy General
               Obligation Bonds, Series 1995 (AMBAC
               Insured), 0.00%, Due 12/01/2025(6)
- ----------                                                                                       ----------

$1,970,000                                                                                       $1,926,646
==========                                                                                       ==========
</TABLE>

For an explanation of the footnotes used on this page, see "Notes to Schedules
of Investments" on page 16.

                                       15

<PAGE>


                        NOTES TO SCHEDULES OF INVESTMENTS

                      AS OF THE OPENING OF BUSINESS ON THE
                    INITIAL DATE OF DEPOSIT: JANUARY 22, 1998

     1. Certain Bonds are represented by "regular way" or "when issued"
contracts for the performance of which an irrevocable letter of credit,
obtained from a financial institution unaffiliated with the Sponsor, has been
deposited with the Trustee. The Sponsor has assigned to the Trustee all of its
right, title and interest in and to such Bonds. Contracts to acquire Bonds were
entered on or after January 15, 1998. These Bonds have expected settlement
dates on or prior to February 18, 1998 (see "The Fund").

     2. All ratings are by Standard & Poor's and/or Moody's. As a result of the
insurance related to each Bond in an Insured Trust, each Bond is rated "AAA" by
Standard & Poor's and/or "Aaa" by Moody's. See "Insurance on Bonds in the
Insured Trusts" and "Description of Bond Ratings."

     3. There is shown under this heading the year in which each issue of the
Bonds is initially or currently callable and the call price for that year. Each
issue of the Bonds continues to be callable at declining prices thereafter (but
not below par value) except for original issue discount bonds which are
redeemable at prices based on the issue price plus the amount of original issue
discount accreted to redemption date plus, if applicable, some premium, the
amount of which will decline in subsequent years. "S.F." indicates a sinking
fund is established with respect to an issue of the Bonds. Redemption pursuant
to call provisions generally will, and redemption pursuant to sinking fund
provisions may, occur at times when the redeemed obligations have an offering
side valuation which represents a premium over par. Certain Bonds may be
subject to redemption without premium prior to the date shown pursuant to
extraordinary optional or mandatory redemptions if certain events occur.
Notwithstanding any provisions to the contrary, certain bond issuers have in
the past, and others may in the future, attempt to redeem bonds prior to their
initially scheduled call dates and at prices which do not include any premiums.
For a general discussion of certain of these events, see "Risk Factors --
Redemptions of Bonds." To the extent that the Bonds were deposited in a Trust
at a price higher than the price at which they are redeemed, this will
represent a loss of capital when compared with the original Public Offering
Price of the Units. Conversely, to the extent that the Bonds were acquired at a
price lower than the redemption price, this will represent an increase in
capital when compared with the original Public Offering Price of the Units.
Distributions will generally be reduced by the amount of the income which would
otherwise have been paid with respect to redeemed Bonds and there will be
distributed to Unitholders the principal amount and any premium received on
such redemption. The Estimated Current Return and Estimated Long-Term Return in
this event may be affected by such redemptions. For the Federal tax effect on
Unitholders of such redemptions and resultant distributions, see "Tax Status"
and "Estimated Current Return and Estimated Long-Term Return."

     4. Evaluation of Bonds is made on the basis of current offering prices for
the Bonds. The offering prices are greater than the current bid prices of the
Bonds which is the basis on which Unit value is determined for purposes of
redemption of Units (see "Public Offering -- Offering Price").

     5. Other information regarding the Bonds in each Trust, as of the opening
of business on the Initial Date of Deposit, is as follows:

<TABLE>
<CAPTION>
                                                                            ANNUAL           BID SIDE
                                         COST TO       PROFIT (LOSS)    INTEREST INCOME     EVALUATION
TRUST                                    SPONSOR        TO SPONSOR         TO TRUST          OF BONDS
- ------------------------------------    ----------     -------------    ---------------     ----------
<S>                                    <C>              <C>                <C>             <C>
   Oregon Insured Series 7 .........    $1,471,881       $ (3,210)          $70,005         $1,459,653
   National Insured Series 5 .......    $1,924,080       $  2,567           $97,875         $1,914,446
</TABLE>

                                       16

<PAGE>


The Sponsor may have entered into contracts which hedge interest rate
fluctuations on certain Bonds in the portfolios. On the opening of business on
the Initial Date of Deposit, the offering side evaluation of the Bonds in each
Trust was higher than the bid side evaluation of such Bonds by 0.61% and 0.63%
for the Oregon and National Trusts, respectively. One Bond in the Oregon Trust
and two Bonds in the National Trust, representing 18% and 20.3% of the
principal amount of the Bonds, respectively, (marked by a double asterisk(**))
were purchased on a "when, as and if issued" basis. Interest on these Bonds
begins accruing to the benefit of Unitholders on their respective dates of
delivery. Delivery is expected to take place 6 to 21 days after the First
Settlement Date.

"#" indicates that such Bond was issued at either an original issue discount or
purchased at a market discount. The tax effect of Bonds issued at an original
issue discount or purchased at a market discount is described in "Tax Status."

     6. This Bond has been purchased at a deep discount from the par value
because there is little or no stated interest income thereon. Bonds which pay
no interest are normally described as "zero coupon" bonds. Over the life of
bonds purchased at a deep discount the value of such bonds will increase such
that upon maturity the holders of such bonds will receive 100% of the principal
amount thereof. To the extent that zero coupon bonds are sold or called prior
to maturity, there is no guarantee that the value of the proceeds received
therefrom by the Trust will equal or exceed the par value that would have been
obtained at maturity of such zero coupon bonds.

                                       17

<PAGE>


EQUIVALENT TAXABLE ESTIMATED CURRENT RETURNS

     As of the date of this Prospectus, the following table shows the
approximate taxable estimated current returns for individuals that are
equivalent to tax-exempt estimated current returns under combined Federal and
State (if applicable) taxes using the published Federal and State (if
applicable) tax rates scheduled to be in effect in 1998. This table illustrates
approximately what you would have to earn on taxable investments to equal the
tax-exempt estimated current return in your income tax bracket. For cases in
which more than one State bracket falls within a Federal bracket, the highest
State bracket is combined with the Federal bracket. The combined State and
Federal tax rates shown reflect the fact that State tax payments are currently
deductible for Federal tax purposes. The table does not show the approximate
taxable estimated current returns for individuals who are subject to the
alternative minimum tax. The taxable equivalent estimated current returns may
be somewhat higher than the equivalent returns indicated in the following table
for those individuals who have adjusted gross incomes in excess of $124,500.
The table does not reflect the effect of limitations on itemized deductions and
the deduction for personal exemptions which were designed to phase out certain
benefits of these deductions for higher income taxpayers. These limitations, in
effect, raise the marginal maximum Federal tax rate to approximately 44 percent
for taxpayers filing a joint return and entitled to four personal exemptions
and to approximately 41 percent for taxpayers filing a single return entitled
to only one personal exemption. These limitations are subject to certain
maximums, which depend on the number of exemptions claimed and the total amount
of the taxpayer's itemized deductions. For example, the limitation on itemized
deductions will not cause a taxpayer to lose more than 80 percent of his
allowable itemized deductions, with certain exceptions. See "Tax Status" for a
more detailed discussion of recent Federal tax legislation, including a
discussion of provisions affecting corporations.


                          NATIONAL TAX EQUIVALENT TABLE

<TABLE>
<CAPTION>

     TAXABLE INCOME ($1,000'S)                               TAX-EXEMPT ESTIMATED CURRENT RETURN
- -----------------------------------           ----------------------------------------------------------------
      SINGLE            JOINT         TAX     4-1/2%     5%    5-1/2%     6%      6-1/2%       7%       7-1/2%
      RETURN            RETURN      BRACKET              EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN
- ------------------ ---------------- -------   ----------------------------------------------------------------
<S>                   <C>            <C>       <C>      <C>     <C>      <C>      <C>        <C>        <C>
          $0-25.35         $0-42.35  15.0%     5.29%    5.88%   6.47%    7.06%     7.65%      8.24%      8.82%
       25.35-61.40     42.35-102.30  28.0      6.25     6.94    7.64     8.33      9.03       9.72      10.42
      61.40-128.10    102.30-155.95  31.0      6.52     7.25    7.97     8.70      9.42      10.14      10.87
     128.10-278.45    155.95-278.45  36.0      7.03     7.81    8.59     9.38     10.16      10.94      11.72
       Over 278.45      Over 278.45  39.6      7.45     8.28    9.11     9.93     10.76      11.59      12.42
</TABLE>


                           OREGON TAX EQUIVALENT TABLE

<TABLE>
<CAPTION>
     TAXABLE INCOME ($1,000'S)                                  TAX-EXEMPT ESTIMATED CURRENT RETURN
- -----------------------------------           ----------------------------------------------------------------
      SINGLE            JOINT         TAX     4-1/2%     5%     5-1/2%     6%      6-1/2%      7%      7-1/2%
      RETURN            RETURN      BRACKET                 EQUIVALENT TAXABLE ESTIMATED CURRENT RETURN
- ------------------ ---------------- -------   ----------------------------------------------------------------
<S>                  <C>             <C>       <C>      <C>     <C>      <C>       <C>       <C>        <C>
          $0-25.35         $0-42.35  22.7%     5.82%    6.47%    7.12%    7.76%     8.41%     9.06%      9.70%
       25.35-61.40     42.35-102.30  34.5      6.87     7.63     8.40     9.16      9.92     10.69      11.45
      61.40-128.10    102.30-155.95  37.2      7.17     7.96     8.76     9.55     10.35     11.15      11.94
     128.10-278.45    155.95-278.45  41.8      7.73     8.59     9.45    10.35     11.17     12.03      12.89
       Over 278.45      Over 278.45  45.0      8.18     9.09    10.00    10.91     11.82     12.73      13.64
</TABLE>

                                       18

<PAGE>


RISK FACTORS

     GENERAL. Certain of the Bonds in the Trusts may have been acquired at a
market discount from par value. The coupon interest rates on the discount bonds
at the time they were purchased and deposited in the Trusts were lower than the
current market interest rates for newly issued bonds of comparable rating and
type. If such interest rates for newly issued comparable bonds increase, the
market discount of previously issued bonds will become greater, and if such
interest rates for newly issued comparable bonds decline, the market discount
of previously issued bonds will be reduced, other things being equal. Investors
should also note that the value of bonds purchased at a market discount will
increase in value faster than Bonds purchased at a market premium if interest
rates decrease. Conversely, if interest rates increase, the value of bonds
purchased at a market discount will decrease faster than Bonds purchased at a
market premium. In addition, if interest rates rise, the prepayment risk of
higher yielding, premium bonds and the prepayment benefit for lower yielding,
discount bonds will be reduced. A discount bond held to maturity will have a
larger portion of its total return in the form of taxable income and capital
gain and less in the form of tax-exempt interest income than a comparable bond
newly issued at current market rates. See "Tax Status." Market discount
attributable to interest changes does not indicate a lack of market confidence
in the issue. Neither the Sponsor, the Distributor nor the Trustee shall be
liable in any way for any default, failure or defect in any of the Bonds.

     Certain of the Bonds in the Trusts may be original issue discount bonds.
Under current law, the original issue discount, which is the difference between
the stated redemption price at maturity and the issue price of the Bonds, is
deemed 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, any gain realized that is in excess of the earned portion of
original issue discount will be taxable as capital gain unless the gain is
attributable to market discount in which case the accretion of market discount
is taxable as ordinary income. See "Tax Status." The current value of an
original issue discount bond reflects the present value of its stated redemption
price at maturity. The market value tends to increase in greater increments as
the Bonds approach maturity.

     Certain of the original issue discount bonds may be zero coupon bonds
(including bonds known as multiplier bonds, money multiplier bonds, capital
appreciation bonds, capital accumulator bonds, compound interest bonds and money
discount maturity payment bonds). Zero coupon bonds do not provide for the
payment of any current interest and generally provide for payment at maturity at
face value unless sooner sold or redeemed. Zero coupon bonds may be subject to
more price volatility than conventional bonds. While some types of zero coupon
bonds, such as multipliers and capital appreciation bonds, define par as the
initial offering price rather than the maturity value, they share the basic zero
coupon bond features of (i) not paying interest on a semi-annual basis and (ii)
providing for the reinvestment of the bond's semi-annual earnings at the bond's
stated yield to maturity. While zero coupon bonds are frequently marketed on the
basis that their fixed rate of return minimizes reinvestment risk, this benefit
can be negated in large part by weak call protection, i.e., a bond's provision
for redemption at only a modest premium over the accreted value of the bond. See
footnote (6) in "The Trusts -- Notes to Schedules of Investments."

     Certain of the Bonds in the Trusts may have been acquired at a market
premium from par value at maturity. The coupon interest rates on the premium
bonds at the time they were purchased and deposited in the Trusts were higher
than the current market interest rates for newly issued bonds of comparable
rating and type. If such interest rates for newly issued and otherwise
comparable bonds decrease, the market premium of previously issued bonds will be
increased, and if such interest rates for newly issued comparable bonds
increase, the market premium of previously issued bonds will be reduced, other
things being equal. The current returns of bonds trading at a market premium are
initially higher than the current returns of comparable bonds of a similar type
issued at currently prevailing

                                       19

<PAGE>


interest rates because premium bonds tend to decrease in market value as they
approach maturity when the face amount becomes payable. Because part of the
purchase price is thus returned not at maturity but through current income
payments, early redemption of a premium bond at par or early prepayments of
principal will result in a reduction in yield. Redemption pursuant to call
provisions generally will, and redemption pursuant to sinking fund provisions
may, occur at times when the redeemed Bonds have an offering side valuation
which represents a premium over par or for original issue discount Bonds a
premium over the accreted value. To the extent that the Bonds were deposited in
the Fund at a price higher than the price at which they are redeemed, this will
represent a loss of capital when compared to the original Public Offering Price
of the Units. Because premium bonds generally pay a higher rate of interest than
Bonds priced at or below par, the effect of the redemption of premium bonds
would be to reduce estimated net annual unit income by a greater percentage than
the par amount of such bonds bears to the total par amount of Bonds in the
affected Trust. Although the actual impact of any such redemptions that may
occur will depend upon the specific Bonds that are redeemed, it can be
anticipated that the estimated net annual unit income will be significantly
reduced after the dates on which such Bonds are eligible for redemption. A Trust
may be required to sell zero coupon bonds prior to maturity (at their current
market price which is likely to be less than their par value) in the event that
all the Bonds in the portfolio other than the zero coupon bonds are called or
redeemed in order to pay expenses of a Trust or in case a Trust is terminated.
See "Trust Administration -- Portfolio Administration" and "Trust Administration
- -- Amendment or Termination." See "The Trusts -- Schedule of Investments" for
each Trust for the earliest scheduled call date and the initial redemption price
for each Bond.

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

     Certain of the Bonds in certain of the Trusts may be obligations which
derive their payments from mortgage loans. Certain of such housing bonds may be
FHA insured or may be single family mortgage revenue bonds issued for the
purpose of acquiring from originating financial institutions notes secured by
mortgages on residences located within the issuer's boundaries and owned by
persons of low or moderate income. In view of this, an investment in such a
Trust should be made with an understanding of the characteristics of such
issuers and the risks which such an investment may entail. Mortgage loans are
generally partially or completely prepaid prior to their final maturities as a
result of events such as sale of the mortgaged premises, default, condemnation
or casualty loss. Because these bonds are subject to extraordinary mandatory
redemption in whole or in part from such prepayments of mortgage loans, a
substantial portion of such bonds will probably be redeemed prior to their
scheduled maturities or even prior to their ordinary call dates. Extraordinary
mandatory redemption without premium could also result from the failure of the
originating financial institutions to make mortgage loans in sufficient amounts
within a specified time period. Additionally, unusually high rates of default on
the underlying mortgage loans may reduce revenues available for the payment of
principal of or interest on such mortgage revenue bonds. These bonds were issued
under Section 103A of the Internal Revenue Code, which Section contains certain
requirements relating to the use of the proceeds of such bonds in order

                                       20

<PAGE>


for the interest on such bonds to retain its tax-exempt status. In each case the
issuer of the bonds has covenanted to comply with applicable requirements and
bond counsel to such issuer has issued an opinion that the interest on the bonds
is exempt from Federal income tax under existing laws and regulations. Certain
issuers of housing bonds have considered various ways to redeem bonds they have
issued prior to the stated first redemption dates for such bonds. In connection
with any housing bonds held by the Fund, the Sponsor at the Initial Date of
Deposit is not aware that any of the respective issuers of such Bonds are
actively considering the redemption of such Bonds prior to their respective
stated initial call dates. See "The Trusts -- General" for each Trust.

     Certain of the Bonds in certain of the Trusts may be health care revenue
bonds. In view of this, an investment in such a Trust should be made with an
understanding of the characteristics of such issuers and the risks which such an
investment may entail. Ratings of bonds issued for health care facilities are
often based on feasibility studies that contain projections of occupancy levels,
revenues and expenses. A facility's gross receipts and net income available for
debt service may be affected by future events and conditions including, among
other things, demand for services and the ability of the facility to provide the
services required, physicians' confidence in the facility, management
capabilities, competition with other health care facilities, efforts by insurers
and governmental agencies to limit rates, legislation establishing state
rate-setting agencies, expenses, the cost and possible unavailability of
malpractice insurance, the funding of Medicare, Medicaid and other similar third
party payor programs, government regulation and the termination or restriction
of governmental financial assistance, including that associated with Medicare,
Medicaid and other similar third party payor programs. Medicare reimbursements
are currently calculated on a prospective basis utilizing a single nationwide
schedule of rates. Prior to such legislation Medicare reimbursements were based
on the actual costs incurred by the health facility. The current legislation may
adversely affect reimbursements to hospitals and other facilities for services
provided under the Medicare program. See "The Trusts -- General" for each Trust.

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

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

     Certain of the Bonds in certain of the Trusts may be industrial revenue
bonds ("IRBs"). In view of this, an investment in such a Trust should be made
with an understanding of the characteristics of such

                                       21

<PAGE>


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

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

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

     Certain of the Bonds in certain of the Trusts may be obligations which are
payable from and secured by revenues derived from the ownership and operation of
facilities such as airports, bridges, turnpikes,

                                       22

<PAGE>


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

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

     An investment in Units of the Trusts should be made with an understanding
of the interest rate risk associated with such an investment. Generally, bond
prices (and therefore Unit prices) will move inversely with interest rates, and
bonds (Trusts) with longer maturities are likely to exhibit greater
fluctuations in market value, all other things being equal, than bonds (Trusts)
with shorter maturities.

     REDEMPTIONS OF BONDS. Certain of the Bonds in certain of the Trusts are
subject to redemption prior to their stated maturity date pursuant to sinking
fund provisions, call provisions or extraordinary optional or mandatory
redemption provisions or otherwise. A sinking fund is a reserve fund
accumulated over a period of time for retirement of debt. A callable debt
obligation is one which is subject to redemption or refunding prior to maturity
at the option of the issuer. A refunding is a method by which a debt obligation
is redeemed, at or before maturity, by the proceeds of a new debt obligation.
In general, call provisions are more likely to be exercised when the offering
side valuation is at a premium over par than when it is at a discount from par.
The exercise of redemption or call provisions will (except to the extent the
proceeds of the called Bonds are used to pay for Unit redemptions) result in
the distribution of principal and may result in a reduction in the amount of
subsequent interest distributions and it may also affect the current return on
Units of the Trust involved. Each Trust portfolio contains a listing of the
sinking fund and call provisions, if any, with respect to each of the Bonds.
Extraordinary optional redemptions and mandatory redemptions result from the
happening of certain events. Generally, events that may permit the
extraordinary optional redemption of Bonds or may require the mandatory

                                       23

<PAGE>


redemption of Bonds include, among others: the substantial damage or
destruction by fire or other casualty of the project for which the proceeds of
the Bonds were used; an exercise by a local, state or Federal governmental unit
of its power of eminent domain to take all or substantially all of the project
for which the proceeds of the Bonds were used; changes in the economic
availability of raw materials, operating supplies or facilities or
technological or other changes which render the operation of the project for
which the proceeds of the Bonds were used uneconomic; changes in law or an
administrative or judicial decree which renders the performance of the
agreement under which the proceeds of the Bonds were made available to finance
the project impossible or which creates unreasonable burdens or which imposes
excessive liabilities, such as taxes, not imposed on the date the Bonds are
issued on the issuer of the Bonds or the user of the proceeds of the Bonds; an
administrative or judicial decree which requires the cessation of a substantial
part of the operations of the project financed with the proceeds of the Bonds,
an overestimate of the costs of the project to be financed with the proceeds of
the Bonds resulting in excess proceeds of the Bonds which may be applied to
redeem Bonds; or an underestimate of a source of funds securing the Bonds
resulting in excess funds which may be applied to redeem Bonds. The Sponsor is
unable to predict all of the circumstances which may result in such redemption
of an issue of Bonds. See "The Trusts -- Schedule of Investments" for each
Trust and footnote (3) in "The Trusts -- Notes to Schedules of Investments."

ESTIMATED CURRENT RETURN AND ESTIMATED LONG-TERM RETURN

     As of the opening of business on the Initial Date of Deposit, the
Estimated Current Returns and the Estimated Long-Term Returns were those
indicated in the "Summary of Essential Financial Information." The Estimated
Current Returns are calculated by dividing the estimated net annual interest
income per Unit by the Public Offering Price. The estimated net annual interest
income per Unit will vary with changes in fees and expenses of the Trustee,
Sponsor and Evaluator and with the principal prepayment, redemption, maturity,
exchange or sale of Bonds, while the Public Offering Price will vary with
changes in the offering price of the underlying Bonds; therefore, there is no
assurance that the present Estimated Current Returns will be realized in the
future. Estimated Long-Term Returns are calculated using a formula which (i)
takes into consideration, and determines and factors in the relative weightings
of, the market values, yields (which takes into account the amortization of
premiums and the accretion of discounts) and estimated retirements of all the
Bonds in a Trust and (ii) takes into account a compounding factor and the
expenses and sales charge associated with each Trust Unit. Since the market
values and estimated retirements of the Bonds and the expenses of a Trust will
change, there is no assurance that the present Estimated Long-Term Returns will
be realized in the future. Estimated Current Returns and Estimated Long-Term
Returns are expected to differ because the calculation of Estimated Long-Term
Returns reflects the estimated date and amount of principal returned while
Estimated Current Returns calculations include only net annual interest income
and Public Offering Price.

     In order to acquire certain of the Bonds contracted for by the Sponsor for
deposit in each Trust, it may be necessary for the Sponsor or Trustee to pay on
the settlement dates for delivery of such Bonds amounts covering accrued
interest on such Bonds which exceed (i) the amounts paid by Unitholders and
(ii) the amounts which will be made available through cash furnished by the
Sponsor on the Initial Date of Deposit, which amount of cash may exceed the
interest which would accrue to the First Settlement Date. The Trustee has
agreed to pay for any amounts necessary to cover any such excess and will be
reimbursed therefor, without interest, when funds become available from
interest payments on the particular Bonds with respect to which such payments
may have been made. Also, since interest on any "when, as and if issued" Bonds
does not begin accruing as tax-exempt interest income to the benefit of
Unitholders until their respective dates of delivery, the Trustee may reduce
its fee (and, to the extent necessary, pay Trust expenses) in an amount equal
to that indicated under "Summary of Essential

                                       24

<PAGE>


Financial Information," in order to maintain (or in some cases approach) for
the Unitholders the same estimated net annual interest incomes during the first
year of the Trusts' operations as is indicated under "Summary of Essential
Financial Information."

TRUST OPERATING EXPENSES

     COMPENSATION OF SPONSOR. Delaware Management Company, Inc., which acts as
Sponsor, will receive a fee for providing portfolio supervision services in
amounts set forth under "Summary of Essential Financial Information" per 100
Units on an annual basis. Such charges will be payable in monthly installments
based on the number of Units outstanding on the first day of each month of each
year. The Sponsor will also be reimbursed for bookkeeping and administrative
services in amounts as set forth under "Summary of Essential Information." With
respect to the fees payable to the Sponsor for providing portfolio supervision
and bookkeeping and other administrative services to the Trusts, such
individual fees may exceed the actual costs of providing such services for the
Trusts, but at no time will the total amount paid to the Sponsor for providing
such services rendered to all unit investment trusts sponsored by Delaware
Management Company, Inc. in any calendar year exceed the aggregate cost to the
Sponsor of supplying such services in such year. The foregoing fees may be
increased without approval of the Unitholders by amounts not exceeding
proportionate increases under the category "All Services Less Rent of Shelter"
in the Consumer Price Index published by the United States Department of Labor
or, if such category is no longer published, in a comparable category. An
affiliate of the Sponsor will receive sales commissions and may realize other
profits (or losses) in connection with the sale of Units and the Sponsor and
the Underwriters may realize profits (or the Sponsor may realize losses) in
connection with the deposit of the Bonds as described under "Public Offering --
Sponsor and Underwriter Compensation."

     EVALUATOR'S FEE. For its services, the Evaluator will receive a fee as set
forth under "Summary of Essential Financial Information." The Evaluator's fees
are payable in monthly installments. The Evaluator's fees may be increased
without approval of the Unitholders by amounts not exceeding proportionate
increases under the category "All Services Less Rent of Shelter" in the
Consumer Price Index published by the United States Department of Labor or, if
such category is no longer published, in a comparable category.

     TRUSTEE'S FEE. For its services, the Trustee will receive an annual fee as
set forth under "Summary of Essential Financial Information." The Trustee's
fees are payable in monthly installments (based on the outstanding principal
amount of Bonds in a Trust as of the first day of each month of each year) on
or before the fifteenth day of each month from the Interest Account to the
extent funds are available and then from the Principal Account. 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 increased without
approval of the Unitholders by amounts not exceeding proportionate increases
under the category "All Services Less Rent of Shelter" in the Consumer Price
Index published by the United States Department of Labor or, if such category
is no longer published, in a comparable category. Since the Trustee has the use
of the funds being held in the Principal and Interest Accounts for future
distributions, payment of expenses and redemptions and since such Accounts are
non-interest bearing to Unitholders, the Trustee benefits thereby. Part of the
Trustee's compensation for its services to the Fund is expected to result from
the use of these funds. For a discussion of the services rendered by the
Trustee pursuant to its obligations under the Trust Agreement, see "Rights of
Unitholders -- Reports Provided" and "Trust Administration."

     MISCELLANEOUS EXPENSES. Expenses incurred in establishing the Trusts,
including the cost of the initial preparation of documents relating to the
Trust (including the Prospectus, Trust Agreement and certificates), federal and
state registration fees, the initial fees and expenses of the Trustee, legal
and

                                       25

<PAGE>


accounting expenses, payment of closing fees and any other out-of-pocket
expenses, will be paid by each Trust and charged off against principal at the
end of the initial offering period. The following additional charges are or may
be incurred by the Trusts: (i) fees of the Trustee for extraordinary services,
(ii) expenses of the Trustee (including legal and auditing expenses) and of
counsel designated by the Sponsor, (iii) various governmental charges, (iv)
expenses and costs of any action taken by the Trustee to protect a Trust and
the rights and interests of Unitholders, (v) indemnification of the Trustee for
any loss, liability or expenses incurred by it in the administration of a Trust
without gross negligence, bad faith or willful misconduct on its part, (vi) any
special custodial fees payable in connection with the sale of any of the Bonds
in a Trust and (vii) expenditures incurred in contacting Unitholders upon
termination of a Trust.

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

INSURANCE ON THE BONDS IN THE INSURED TRUSTS

     Insurance guaranteeing prompt payment of interest and principal, when due,
on the Bonds in the Insured Trusts in the Fund has been obtained by the Sponsor
or by the issuers or underwriters of such Bonds.

     An 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 Insured 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,
in the event such payments are not 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 Insurers'
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. Each 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. However, as indicated under "Tax Status," the respective
issuing authorities have received opinions of bond counsel relating to the
valid issuance of each of the Bonds in the Trusts. Each 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. Such policies are not covered by
the property/casualty insolvency funds maintained by various states. The
policies are non-cancelable and the insurance premiums have been fully paid on
or prior to the date of deposit, either by the Sponsor or, if a policy has been
obtained by a Bond issuer, by such issuer.

     Standard & Poor's rates all new issues insured by an Insurer "AAA Prime
Grade." Moody's rates all bond issues insured by an Insurer "Aaa." These
ratings independently reflect each company's current assessment of the
creditworthiness of each Insurer and its ability to pay claims on its policies
of insurance. See "Investment Objectives and Portfolio Selection." Any further
explanation as to the

                                       26

<PAGE>


significance of either rating may be obtained only from the company which
issued the respective rating. Neither rating is a recommendation to buy, sell
or hold the Bonds, and such rating may be subject to revision or withdrawal at
any time by the respective issuer. Any downward revision or withdrawal of the
rating 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 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.

TAX STATUS

     At the respective times of issuance of the Bonds, opinions relating to the
validity thereof and to the exclusion of interest thereon from Federal gross
income were rendered by bond counsel to the respective issuing authorities. In
addition, with respect to State Trusts, where applicable, bond counsel to the
issuing authorities rendered opinions as to the exemption of interest on such
Bonds when held by residents of the State in which issuers of such Bonds are
located, from State income taxes and certain State or local intangibles and
local income taxes. Neither the Sponsor nor Chapman and Cutler have made any
special review for the Fund of the proceedings relating to the issuance of the
Bonds or of the bases for such opinions. If the interest on a Bond should be
determined to be taxable, the Bond would generally have to be sold at a
substantial discount. In addition, investors could be required to pay income
tax on interest received prior to the date on which interest is determined to
be taxable.

     Gain realized on the sale or redemption of the Bonds by the Trustee or of
a Unit by a Unitholder is includible in gross income for Federal income tax
purposes and may be includible in gross income for state tax purposes. (Such
gain does not include any amounts received in respect of accrued interest or
accrued original issue discount, if any). If a Bond is acquired with accrued
interest, that portion of the price paid for the accrued interest is added to
the tax basis of the Bond. When this accrued interest is received, it is
treated as a return of capital and reduces the tax basis of the Bond. If a Bond
is purchased for a premium, the amount of the premium is added to the tax basis
of the Bond. Bond premium is amortized over the remaining term of the Bond, and
the tax basis of the Bond is reduced each tax year by the amount of the premium
amortized in that tax year. For purposes of the following opinions, it is
assumed that each asset of the Trust is debt, the interest on which is excluded
for Federal income tax purposes.

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

          1. Each Trust is not an association taxable as a corporation for
     Federal income tax purposes and interest and accrued original issue
     discount on Bonds which is excludable from gross income under the Internal
     Revenue Code of 1986 (the "Code") will retain its status for Federal income
     tax purposes, when received by a Trust and when distributed to Unitholders;
     however such interest may be taken into account in computing the
     alternative minimum tax, an additional tax on branches of foreign
     corporations and the environmental tax (the "Superfund Tax"), as noted
     below;

          2. Each Unitholder is considered to be the owner of a pro rata portion
     of each asset of the respective Trust under subpart E, subchapter J of
     chapter 1 of the Code and will have a taxable event when such Trust
     disposes of a Bond, or when the Unitholder redeems or sells his Unit. If
     the Unitholder disposes of a Unit, he is deemed thereby to have disposed of
     his entire pro rata interest in all assets of the Trust involved including
     his pro rata portion of all the Bonds represented by the Unit. Legislative
     proposals have been made that would treat certain transactions designed to
     reduce or eliminate risk of loss and opportunities for gain as constructive
     sales for purposes of recognition of gain (but not loss). Unitholders
     should consult their own tax advisors with regard to any such constructive
     sale rules. Unitholders must reduce the tax basis of their Units for their
     share of

                                       27

<PAGE>


     accrued interest received by the respective Trust, if any, on Bonds
     delivered after the date the Unitholders pay for their Units to the extent
     that such interest accrued on such Bonds before the date the Trust acquired
     ownership of the Bonds (and the amount of this reduction may exceed the
     amount of accrued interest paid to the seller), and, consequently, such
     Unitholders may have an increase in taxable gain or reduction in capital
     loss upon the disposition of such Units. Gain or loss upon the sale or
     redemption of Units is measured by comparing the proceeds of such sale or
     redemption with the adjusted basis of the Units. If the Trustee disposes of
     Bonds (whether by sale, payment on maturity, redemption or otherwise), gain
     or loss is recognized to the Unitholder (subject to various non-recognition
     provisions of the Code). The amount of any such gain or loss is measured by
     comparing the Unitholder's pro rata share of the total proceeds from such
     disposition with the Unitholder's basis for his or her fractional interest
     in the asset disposed of. In the case of a Unitholder who purchases Units,
     such basis (before adjustment for accrued original issue discount and
     amortized bond premium, if any) is determined by apportioning the cost of
     the Units among each of the Trust assets ratably according to value as of
     the valuation date nearest the date of acquisition of the Units. It should
     be noted that certain legislative proposals have been made which could
     affect the calculation of basis for Unitholders holding securities that are
     substantially identical to the Bonds. Unitholders should consult their own
     tax advisors with regard to the calculation of basis. The tax basis
     reduction requirements of the Code relating to amortization of bond premium
     may, under some circumstances, result in the Unitholder realizing a taxable
     gain when his Units are sold or redeemed for an amount less than or equal
     to his original cost; and

          3. Any proceeds paid under individual policies obtained by issuers of
     Bonds which represent maturing interest on defaulted Bonds held by the
     Trustee will be excludable from Federal gross income if, and to the same
     extent as, such interest would have been excludable if paid in the normal
     course by the issuer of the defaulted Bonds provided that, at the time such
     policies are purchased, the amounts paid for such policies are reasonable,
     customary and consistent with the reasonable expectation that the issuer of
     the Bonds, rather than the Insurer, will pay debt service on the Bonds.

     Sections 1288 and 1272 of the Code provide a complex set of rules
governing the accrual of original issue discount. These rules provide that
original issue discount accrues either on the basis of a constant compound
interest rate or ratably over the term of the Bond, depending on the date the
Bond was issued. In addition, special rules apply if the purchase price of a
Bond exceeds the original issue price plus the amount of original issue
discount which would have previously accrued based upon its issue price (its
"adjusted issue price") to prior owners. If a Bond is acquired with accrued
interest, that portion of the price paid for the accrued interest is added to
the tax basis of the Bond. When this accrued interest is received, it is
treated as a return of capital and reduces the tax basis of the Bond. If a Bond
is purchased for a premium, the amount of the premium is added to the tax basis
of the Bond. Bond premium is amortized over the remaining term of the Bond, and
the tax basis of the Bond is reduced each tax year by the amount of the premium
amortized in that tax year. The application of these rules will also vary
depending on the value of the Bonds on the date a Unitholder acquires his Units
and the price the Unitholder pays for his Units. Unitholders should consult
with their tax advisers regarding these rules and their application.

     "The Revenue Reconciliation Act of 1993" (the "Tax Act") subjects
tax-exempt bonds to the market discount rules of the Code effective for bonds
purchased after April 30, 1993. In general, market discount is the amount (if
any) by which the stated redemption price at maturity exceeds an investor's
purchase price (except to the extent that such difference, if any, is
attributable to original issue discount not yet accrued) subject to a statutory
DE MINIMIS rule. Market discount can arise based on the price a Trust pays for
Bonds or the price a Unitholder pays for his or her Units. Under the Tax Act,
accretion of market discount is taxable as ordinary income; under prior law the
accretion had been treated as

                                       28

<PAGE>


capital gain. Market discount that accretes while a Trust holds a Bond would be
recognized as ordinary income by the Unitholders when principal payments are
received on the Bond, upon sale or at redemption (including early redemption),
or upon the sale or redemption of his or her Units, unless a Unitholder elects
to include market discount in taxable income as it accrues. The market discount
rules are complex and Unitholders should consult their tax advisers regarding
these rules and their application.

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

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

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

     ALL STATEMENTS OF LAW IN THE PROSPECTUS CONCERNING EXCLUSION FROM GROSS
INCOME FOR FEDERAL, STATE OR OTHER TAX PURPOSES ARE THE OPINIONS OF COUNSEL AND
ARE TO BE SO CONSTRUED.

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

     For taxpayers other than corporations, net capital gain (which is defined
as net long-term capital gain over net short-term capital loss for the taxable
year) is subject to a maximum marginal stated tax rate of either 28% or 20%,
depending upon the holding periods of the capital assets. Capital loss is
long-term if the holding period for the asset is more than one year, and is
short-term if the holding period for the asset is one year or less. Generally,
capital gains realized from assets held for more than

                                       29

<PAGE>


one year but not more than 18 months are taxed at a maximum marginal stated tax
rate of 28% and capital gains realized from assets (with certain exclusions)
held for more than 18 months are taxed at a maximum marginal stated tax rate of
20% (10% in the case of certain taxpayers in the lowest tax bracket). Further,
capital gains realized from assets held for one year or less are taxed at the
same rates as ordinary income. Legislation is currently pending that provides
the appropriate methodology that should be applied in netting the realized
capital gains and losses. Such legislation is proposed to be effective
retroactively for tax years ending after May 6, 1997. The Internal Revenue
Service has released preliminary guidance which provides that, in general,
pass-through entities may designate their capital gain dividends as either a
20% rate gain distribution or a 28% rate gain distribution, depending on the
nature of the gain received by the pass-through entity. Unitholders should
consult their own tax advisers as to the tax rate applicable to capital gain
dividends.

     In addition, please note that capital gains may be recharacterized as
ordinary income in the case of certain financial transactions that are
considered "conversion transactions" effective for transactions entered into
after April 30, 1993. Unit holders and prospective investors should consult
with their tax advisers regarding the potential effect of this provision on
their investment in Units.

     For purposes of computing the alternative minimum tax for individuals and
corporations and the Superfund Tax for corporations, interest on certain
private activity bonds (which includes most industrial and housing revenue
bonds) issued on or after August 8, 1996 is included as an item of tax
preference.

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

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

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

     FOR A DISCUSSION OF THE STATE TAX STATUS OF INCOME EARNED ON UNITS OF A
TRUST, SEE "THE TRUSTS -- STATE TAXATION" FOR THE APPLICABLE TRUST. EXCEPT AS
NOTED THEREIN, THE EXEMPTION OF INTEREST ON STATE AND LOCAL OBLIGATIONS FOR
FEDERAL INCOME TAX PURPOSES DISCUSSED ABOVE DOES NOT NECESSARILY RESULT IN
EXEMPTION UNDER THE INCOME OR OTHER TAX LAWS OF ANY STATE OR CITY. THE LAWS OF
THE SEVERAL STATES VARY WITH RESPECT TO THE TAXATION OF SUCH OBLIGATIONS.

     Ownership of the Units may result in collateral federal income tax
consequences to certain taxpayers, including, without limitation, corporations
subject to the branch profits tax, financial institutions,

                                       30

<PAGE>


certain insurance companies, certain S corporations, individual recipients of
Social Security or Railroad Retirement benefits and taxpayers who may be deemed
to have incurred (or continued) indebtedness to purchase or carry tax-exempt
obligations. Prospective investors should consult their tax advisors as to the
applicability of any collateral consequences.

PUBLIC OFFERING

     GENERAL. Units are offered at the Public Offering Price. During the
initial offering period the Public Offering Price is based on the offering
prices of the Bonds in each Trust and includes a sales charge of 4.9% of the
Public Offering Price (5.152% of the aggregate offering price of the Bonds)
plus any accrued interest. In the secondary market the Public Offering Price is
based on the bid prices of the Bonds in each Trust and includes a sales charge
of 5.5% of the Public Offering Price (5.820% of the aggregate bid price of the
Bonds) plus any accrued interest. However, the sales charge applicable to
quantity purchases is, during the initial offering period, reduced by a
discount on a graduated basis to any person acquiring $100,000 or more as
follows (except for sales made pursuant to a "wrap fee account" or similar
arrangements as set forth below):

       AGGREGATE DOLLAR VALUE                         REDUCTION AS A
       OF UNITS PURCHASED                       PERCENT OF OFFERING PRICE
       ----------------------                   -------------------------

       $100,000 - 249,999  ..................             0.30% 
       $250,000 - 499,999  ..................             0.50% 
       $500,000 - 999,999  ..................             0.90% 
       $1,000,000 or more  ..................             1.40% 

     Any such reduced sales charge shall be the responsibility of the selling
Underwriter, broker, dealer or agent. The reduced sales charge structure will
apply on all purchases of Units in a Trust by the same person on any one day
from any one Underwriter or dealer. In addition, Unitholders who, during the
offering period, cumulatively purchase a sufficient number of Units of a Trust
to qualify for a reduced sales charge will receive such reduction retroactively
upon reaching the appropriate level. Units purchased in the name of the spouse
of a purchaser or in the name of a child of such purchaser under 21 years of
age will be deemed for the purposes of calculating the applicable sales charge
to be additional purchases by the purchaser. Investors may use the redemption
proceeds they have received from other unit investment trusts sponsored by the
Sponsor to purchase Units of a Trust without a sales charge. The reduced sales
charges will also be applicable to a trustee or other fiduciary purchasing
securities for one or more trust estate or fiduciary accounts. Employees,
officers and directors (including their immediate family members, defined as
spouses, children, grandchildren, parents, grandparents, mothers-in-law,
fathers-in-law, sons-in-law and daughters-in-law, and trustees, custodians or
fiduciaries for the benefit of such persons) of the Sponsor and its affiliates
may purchase Units of the Trusts without a sales charge in both the initial and
secondary offering periods.

     Investors who purchase Units through registered broker/dealers who charge
periodic fees for financial planning, investment advisory or asset management
services, or provide such services in connection with the establishment of an
investment account for which a comprehensive "wrap fee" charge is imposed, may
purchase Units in the initial and secondary offering periods at the Public
Offering Price less the concession the Sponsor typically would allow such
broker/dealer. See "Public Offering -- Unit Distribution."

     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 generally is paid semi-annually, although a Trust accrues such interest
daily. Because of this, each Trust always has an amount of interest earned but
not yet collected by the Trustee. For this reason, with respect to sales
settling subsequent to the First

                                       31

<PAGE>


Settlement Date, the Public Offering Price of Units will have added to it the
proportionate share of accrued interest to the date of settlement. Unitholders
will receive on the next distribution date of the respective Trust the amount,
if any, of accrued interest paid on their Units.

     In an effort to reduce the amount of accrued interest which would
otherwise have to be paid in addition to the Public Offering Price in the sale
of Units to the public, the Trustee will advance the amount of accrued interest
as of the First Settlement Date and the same will be distributed to the Sponsor
as the Unitholder of record as of the First Settlement Date. Consequently, the
amount of accrued interest to be added to the Public Offering Price of Units
will include only accrued interest from the First Settlement Date to the date
of settlement, less any distributions from the Interest Account subsequent to
the First Settlement Date. See "Rights of Unitholders -- Distributions of
Interest and Principal."

     Because of the varying interest payment dates of the Bonds, accrued
interest at any point in time will be greater than the amount of interest
actually received by a Trust and distributed to Unitholders. Therefore, there
will always remain an item of accrued interest that is added to the value of
the Units. If a Unitholder sells or redeems all or a portion of his Units, he
will be entitled to receive his proportionate share of the accrued interest
from the purchaser of his Units. Since the Trustee has the use of the funds
held in the Interest Account for distributions to Unitholders and since such
Account is noninterest-bearing to Unitholders, the Trustee benefits thereby.

     OFFERING PRICE. The Public Offering Price of the Units will vary from the
amounts stated under "Summary of Essential Financial Information" in accordance
with fluctuations in the prices of the underlying Bonds in each Trust.

     As indicated above, the price of the Units as of the opening of business
on the Initial Date of Deposit was determined by adding to the determination of
the aggregate offering price of the Bonds an amount equal to 5.152% of such
value and dividing the sum so obtained by the number of Units outstanding. This
computation produced a gross underwriting profit equal to 4.9% of the Public
Offering Price. Such price determination as of the opening of business on the
Initial Date of Deposit was made on the basis of an evaluation of the Bonds in
each Trust prepared by Muller Data Corporation, a firm regularly engaged in the
business of evaluating, quoting or appraising comparable securities. Except on
the Initial Date of Deposit, during the initial offering period, the Evaluator
will appraise or cause to be appraised daily the value of the underlying Bonds
as of the close of trading on the New York Stock Exchange (generally 4:00 P.M.
Eastern Time) on days the New York Stock Exchange is open (or as of any earlier
closing time on a day on which the New York Stock Exchange is scheduled in
advance to close at such earlier time) and will adjust the Public Offering
Price of the Units commensurate with such appraisal. Such Public Offering Price
will be effective for all orders received at or prior to the close of trading
on the New York Stock Exchange on each such day (or as of any earlier closing
time on a day on which the New York Stock Exchange is scheduled in advance to
close at such earlier time). Orders received by the Trustee, Sponsor,
Distributor or any Underwriter or dealer for purchases, sales or redemptions
after that time, or on a day when the New York Stock Exchange is closed, will
be held until the next determination of price. For secondary market sales, the
Public Offering Price per Unit will be equal to the aggregate bid price of the
Bonds in a Trust plus the secondary market sales charge. For secondary market
purposes, such appraisal and adjustment will be made by the Evaluator as of the
close of trading on the New York Stock Exchange on days on which the New York
Stock Exchange is open (or as of any earlier closing time on a day on which the
New York Stock Exchange is schedule in advance to close at such earlier time)
for each day on which any Unit of a Trust is tendered for redemption, and it
shall determine the aggregate value of such Trust as of the close of trading on
the

                                       32

<PAGE>


New York Stock Exchange (or as of any earlier closing time on a day on which
the New York Stock Exchange is scheduled in advance to close at such earlier
time) on such other days as may be necessary.

     The aggregate price of the Bonds in each Trust has been and will be
determined on the basis of bid prices or offering prices, as appropriate, (i)
on the basis of current market prices for the Bonds obtained from dealers or
brokers who customarily deal in bonds comparable to those held by the Trust;
(ii) if such prices are not available for any particular Bonds, on the basis of
current market prices for comparable bonds; (iii) by causing the value of the
Bonds to be determined by others engaged in the practice of evaluation, quoting
or appraising comparable bonds; or (iv) by any combination of the above.

     The initial or primary Public Offering Price of the Units and the
Sponsor's initial repurchase price per Unit are based on the offering price per
Unit of the underlying Bonds plus the applicable sales charge plus interest
accrued but unpaid from the First Settlement Date to the date of settlement.
The secondary market Public Offering Price and the Redemption Price per Unit
are based on the bid price per Unit of the Bonds in each Trust plus the
applicable sales charge plus accrued interest. The offering price of Bonds in
each Trust may be expected to range from .35%-1% more than the bid price of
such Bonds. On the Initial Date of Deposit, the offering side evaluation of the
Bonds in each Trust were higher than the bid side evaluation of such Bonds by
the amount indicated under footnote (5) in "The Trusts -- Notes to Schedules of
Investments."

     Although payment is normally made three business days following the order
for purchase, payment may be made prior thereto. However, delivery of
certificates, if any are requested in writing, representing Units so ordered
will be made as soon as possible following such order or shortly thereafter. A
person will become the owner of Units on the date of settlement provided
payment has been received. Cash, if any, made available to the Distributor
prior to the date of settlement for the purchase of Units may be used in the
Distributor's business and may be deemed to be a benefit to the Distributor,
subject to the limitations of the Securities Exchange Act of 1934.

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

     The Sponsor intends to qualify the Units for sale in the state for which
such Trust is named, except that in the case of the National Trusts, the
Sponsor intends to qualify Units for sale in a number of states and Puerto
Rico. Broker-dealers or others will be allowed a concession or agency
commission in connection with the distribution of Units during the initial
offering period equal to $.33 per Unit and in the secondary market equal to
4.0% of the Public Offering Price per Unit. In addition, broker-dealers or
others who sell, within five business days of a Trust's Initial Date of
Deposit, that amount necessary to qualify for the Underwriter Concession set
forth under "Sponsor and Underwriter Compensation" below will be allowed the
concession set forth in such section on all sales during such period. Certain
commercial banks are making Units of the Fund available to their customers on
an agency basis. A portion of the sales charge (equal to the agency commission
referred to above) is retained by or remitted to the banks. Under the
Glass-Steagall Act, banks are prohibited from underwriting Units of the Fund;
however, the Glass-Steagall Act does permit certain agency transactions and the
banking regulators have not indicated that these particular agency transactions
are not permitted under such Act. In addition, state securities laws on this
issue may differ from the interpretations of Federal law expressed herein and
banks and financial institutions may be required to register as dealers
pursuant to state law. Notwithstanding the concessions referred to above, in
connection with any quantity purchases, a broker/dealer or bank will receive
the following concessions for purchases made from the Distributor, pursuant to
the

                                       33

<PAGE>

sales charge reduction schedule for quantity purchases set forth above,
resulting in total concessions as contained in the following table:

        AGGREGATE DOLLAR VALUE                     TOTAL CONCESSION
        OF UNITS PURCHASED                             PER UNIT    
        ----------------------                     ----------------

        $100,000 - $249,999 ....................        $ .32
        $250,000 - $499,999 ....................          .31
        $500,000 - $999,999 ....................          .29
        $1,000,000 or more  ....................          .25

     The Sponsor and the Distributor each reserves the right to reject, in
whole or in part, any order for the purchase of Units and to change the amount
of the concession or agency commission to dealers and others from time to time.
See "Underwriting." To facilitate the handling of transactions, sales of Units
shall normally be limited to transactions involving a minimum of $1,000.

     SPONSOR AND UNDERWRITER COMPENSATION. The gross sales commission through
the initial or primary distribution of Units will equal 4.9% of the Public
Offering Price of the Units (5.152% of the net amount invested), less any
reduced sales charge for quantity purchases as described under "General" above.
Underwriters will acquire Units from the Distributor based on the amount of
Units underwritten. The concessions from the Public Offering Price will be as
set forth in the following table:

        AGGREGATE DOLLAR VALUE                     TOTAL UNDERWRITER  
        OF UNITS UNDERWRITTEN                      CONCESSION PER UNIT
        ----------------------                     -------------------
                                                                      
        $100,000 - $249,999 ....................         $ .35        
        $250,000 - $499,999 ....................           .36        
        $500,000 - $999,999 ....................           .37        
        $1,000,000 or more  ....................           .40        

     Broker-dealers and other financial institutions purchasing Units from the
Distributor during the first week after the Initial Date of Deposit may also
receive the concession described above according to the schedule above
describing Underwriters compensation. In addition, the Sponsor will realize a
profit or will sustain a loss, as the case may be, as a result of the
difference between the price paid for the Bonds by the Sponsor and the cost of
such Bonds to a Trust (which is based on the determination of the aggregate
offering price of the Bonds in such Trust on the Initial Date of Deposit as
prepared by Muller Data Corporation). See "Underwriting" and "The Trusts --
Schedules of Investments." Affiliates of the Underwriters may also realize
profits or sustain losses with respect to Bonds deposited in a Trust which were
acquired by the Sponsor from underwriting syndicates of which such parties were
members. The Sponsor has not participated as sole underwriter or as a manager
or as a member of an underwriting syndicate from which any of the Bonds in the
portfolios of the Trusts were acquired. The Underwriters may further realize
additional profit or loss during the initial offering period as a result of the
possible fluctuations in the market value of the Bonds in a Trust after the
Initial Date of Deposit, since all proceeds received from purchasers of Units
(excluding dealer concessions or agency commissions allowed, if any) will be
retained by the Underwriters.

     As stated under "Public Market" below, an affiliate of the Sponsor,
Delaware Distributors, L.P. (the "Distributor"), intends to, and certain of the
other Underwriters may, maintain a secondary market for the Units of the Fund.
In so maintaining a market, the Distributor or any such Underwriters will also
realize profits or sustain losses in the amount of any difference between the
price at which Units are purchased and the price at which Units are resold
(which price is based on the bid prices of the Bonds in a Trust and includes a
sales charge). In addition, the Sponsor, the Distributor or any such
Underwriters will also realize profits or sustain losses resulting from a
redemption of such repurchased Units at a price above or below the purchase
price for such Units, respectively.

                                       34

<PAGE>


     PUBLIC MARKET. During the initial public offering period, the Distributor
and/or certain of the other Underwriters intend to offer to purchase Units at a
price based on the aggregate offering price per Unit of the Bonds in each Trust
plus accrued interest to the date of settlement. Afterward, although they are
not obligated to do so, the Distributor intends to, and certain of the other
Underwriters may, maintain a market for the Units offered hereby and to offer
continuously to purchase such Units at the bid price of the Bonds in the
portfolio plus interest accrued to the date of settlement plus any principal
cash on hand, less any amounts representing taxes or other governmental charges
payable out of the Trust and less any accrued Trust expenses. If the supply of
Units exceeds demand or if some other business reason warrants it, the
Distributor and/or the other Underwriters may either discontinue all purchases
of Units or discontinue purchases of Units at such prices. In the event that a
market is not maintained for the Units and the Unitholder cannot find another
purchaser, a Unitholder desiring to dispose of his Units may dispose of such
Units by tendering them to the Trustee for redemption at the Redemption Price,
which is based upon the aggregate bid price of the Bonds in the portfolio and
any accrued interest. The aggregate bid prices of the underlying Bonds in a
Trust are expected to be less than the related aggregate offering prices. See
"Rights of Unitholders -- Redemption of Units." A UNITHOLDER WHO WISHES TO
DISPOSE OF HIS UNITS SHOULD INQUIRE OF HIS BROKER AS TO CURRENT MARKET PRICES
IN ORDER TO DETERMINE WHETHER THERE IS IN EXISTENCE ANY PRICE IN EXCESS OF THE
REDEMPTION PRICE AND, IF SO, THE AMOUNT THEREOF.

RIGHTS OF UNITHOLDERS

     OWNERSHIP OF UNITS. Ownership of Units of any Trust will not be evidenced
by certificates unless a Unitholder, the Unitholder's registered broker/dealer
or the clearing agent for such broker/dealer makes a written request to the
Trustee. Certificates, if issued, will be so noted on the confirmation
statement sent to the Underwriter and broker. Non-receipt of such
certificate(s) must be reported to the Trustee within one year; otherwise, a 2%
surety bond fee will be required for replacement.

     Units are transferable by making a written request to the Trustee and, in
the case of Units evidenced by a certificate, by presenting and surrendering
such certificate to the Trustee properly endorsed or accompanied by a written
instrument or instruments of transfer which should be sent registered or
certified mail for the protection of the Unitholder. Unitholders must sign such
written request, and such certificate or transfer instrument, exactly as their
names appear on the records of the Trustee and on any certificate representing
the Units to be transferred. Such signatures must be guaranteed by a
participant in the Securities Transfer Agents Medallion Program ("STAMP") or
such other signature guarantee program in addition to, or in substitution for,
STAMP, as may be accepted by the Trustee.

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

     DISTRIBUTIONS OF INTEREST AND PRINCIPAL. Interest received by the Trusts,
including that part of the proceeds of any disposition of Bonds which
represents accrued interest and including any insurance proceeds representing
interest due on defaulted Bonds, is credited by the Trustee to the Interest
Account of the appropriate Trust. Other receipts are credited to the Principal
Account of the appropriate Trust. Interest received by a Trust after deduction
of amounts sufficient to reimburse the Trustee for any amounts advanced and
paid to the Sponsor as the Unitholder of record as of the First Settlement Date
(see "Public Offering -- Offering Price") will be distributed on or shortly
after the fifteenth day of each

                                       35

<PAGE>


month on a pro rata basis to Unitholders of record as of the preceding record
date (which will be the first day of the month). All distributions will be net
of applicable expenses. The pro rata share of cash in the Principal Account
will be computed as of the applicable record date, and distributions to the
Unitholders as of such record date will be made on or shortly after the
fifteenth day of such month. Proceeds received from the disposition of any of
the Bonds after such record date and prior to the following distribution date
will be held in the Principal Account and not distributed until the next
distribution date. The Trustee is not required to pay interest on funds held in
the Principal or Interest Accounts (but may itself earn interest thereon and
therefore benefits from the use of such funds) nor to make a distribution from
the Principal Account unless the amount available for distribution shall equal
at least $0.01 per Unit.

     The distribution to the Unitholders as of each record date after the First
Settlement Date will be made on the following distribution date or shortly
thereafter and shall consist of an amount substantially equal to one twelfth of
the Unitholders' pro rata share of the estimated net annual unit income in the
Interest Account after deducting estimated expenses. Because interest payments
are not received by the Trusts at a constant rate throughout the year, such
interest distribution may be more or less that the amount credited to the
Interest Account as of the record date. For the purpose of minimizing
fluctuation in the distributions from the Interest Account, the Trustee is
authorized to advance such amounts as may be necessary to provide interest
distributions of approximately equal amounts. The Trustee shall be reimbursed
for any such advances from funds in the Interest Account on the ensuing record
date. Persons who purchase Units will commence receiving distributions only
after such person becomes a record owner. Notification to the Trustee of the
transfer of Units is the responsibility of the purchaser, but in the normal
course of business such notice is provided by the selling broker-dealer.

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

     REINVESTMENT OPTION. Unitholders of the Trusts may elect to have each
distribution of interest income, capital gains and/or principal on their Units
automatically reinvested, or redemption proceeds exchanged, in shares of any
mutual fund in the Delaware Group of Mutual Funds, which are registered in the
Unitholder's state of residence. Such mutual funds are hereinafter collectively
referred to as the "Reinvestment Funds."

     Each Reinvestment Fund has investment objectives which differ from those
of the Trusts. The prospectus relating to each Reinvestment Fund describes the
investment policies of such fund and sets forth the procedures to follow to
commence reinvestment. A Unitholder should obtain a prospectus for the
respective Reinvestment Fund by writing to Delaware Distributors, L.P. at 1818
Market Street, Philadelphia, Pennsylvania 19103, or by phone at 800-362-7500.

     After becoming a participant in a reinvestment plan, redemption proceeds
or each distribution of interest income, capital gains and/or principal on the
participant's Units will, on the applicable distribution date, automatically be
applied, as directed by such person, as of such distribution date by the
Trustee to purchase shares (or fractions thereof) of the applicable
Reinvestment Fund at a net asset value as computed as of the next close of
trading on the New York Stock Exchange on such date.

                                       36

<PAGE>


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

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

     REPORTS PROVIDED. 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 being distributed expressed in each case as a
dollar amount representing the pro rata share of each Unit of a Trust
outstanding. For as long as the Sponsor deems it to be in the best interests of
the Unitholders, the accounts of each Trust shall be audited, not less
frequently than annually, by independent certified public accountants and the
report of such accountants shall be furnished by the Trustee to Unitholders of
such Trusts upon request. Within a reasonable period of time after the end of
each calendar year, the Trustee shall furnish to each person who at any time
during the calendar year was a registered Unitholder of a Trust a statement (i)
as to the Interest Account: interest received (including amounts representing
interest received upon any disposition of the Bonds) and the percentage of such
amount by states and territories in which the issuers of such Bonds are
located, deductions for applicable taxes and for fees and expenses of such
Trust, for purchases of Replacement Bonds and for redemptions of Units, if any,
reservations made by the Trustee, if any, and the balance remaining after such
distributions and deductions, expressed in each case both as a total dollar
amount and as a dollar amount representing the pro rata share of each Unit
outstanding on the last business day of such calendar year; (ii) as to the
Principal Account: the dates of disposition of any Bonds and the net proceeds
received therefrom (excluding any portion representing accrued interest), the
amount paid for purchases of Replacement Bonds and for redemptions of Units, if
any, reservations made by the Trustee, if any, deductions for payment of
applicable taxes, fees and expenses of such Trust 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 Redemption Price per Unit based upon the last computation
thereof made during such calendar year; and (v) 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
representing the pro rata share of each Unit outstanding.

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

     REDEMPTION OF UNITS. A Unitholder who does not dispose of Units in the
secondary market described above may cause Units to be redeemed by the Trustee
by making a written request to the Trustee, at its unit investment trust
office, The Chase Manhattan Bank, Bowling Green Station, P.O. Box 5185, New
York, NY 10274-5185 and, in the case of Units evidenced by a certificate, by
tendering such certificate to the Trustee, properly endorsed or accompanied by
a written instrument or instruments of transfer in form satisfactory to the
Trustee. Unitholders must sign the request, and such certificate or transfer
instrument, exactly as their names appear on the records of the Trustee and on
any certificate representing the Units to be redeemed. If the amount of the
redemption is $25,000 or less and the proceeds are payable to the Unitholder(s)
of record at the address of record, no signature guarantee is necessary for
redemptions by individual account owners (including joint owners). Additional
documentation may be requested, and a signature guarantee is always required,
from corporations, executors, administrators, trustees, guardians or
associations. The signatures must be guaranteed by a participant in the

                                       37

<PAGE>


STAMP or such other guarantee program in addition to, or in substitution for,
STAMP, as may be accepted by the Trustee. A certificate should only be sent by
registered or certified mail for the protection of the Unitholder. Since tender
of the certificate is required for redemption when one has been issued, Units
represented by a certificate cannot be redeemed until the certificate
representing such Units has been received by the purchasers. The Trustee's
toll-free number for customer assistance is 1-800-428-8890, available 9:00 a.m.
to 5:00 p.m. EST any business day.

     Redemption shall be made by the Trustee on the third business day
following the day on which a tender for redemption is received (the "Redemption
Date"). Such redemption shall be made by payment of cash, equivalent to the
Redemption Price for such Trust, determined as set forth below as of the
evaluation time stated under "Summary of Essential Financial Information," next
following such tender, multiplied by the number of Units being redeemed. Any
Units redeemed shall be cancelled and any undivided fractional interest in the
Fund extinguished. The price received upon redemption might be more or less
than the amount paid by the Unitholder depending on the value of the Bonds in
the Trust involved at the time of redemption.

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

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

     The Redemption Price per Unit (as well as the secondary market Public
Offering Price) will be determined on the basis of the bid price of the Bonds
in each Trust, while the initial and primary Public Offering Price of Units
will be determined on the basis of the offering price of the Bonds, as of the
close of trading on the New York Stock Exchange (or as of any earlier closing
time on a day on which the New York Stock Exchange is schedule in advance to
close at such earlier time) on days of trading on the New York Stock Exchange
on the date any such determination is made. On the Initial Date of Deposit, the
Public Offering Price per Unit (which is based on the offering prices of the
Bonds and includes the sales charge) exceeded the value at which Units could
have been redeemed (based upon the current bid prices of the Bonds in such
Trust) by the amount shown under "Summary of Essential Financial Information."
While the Trustee has the power to determine the Redemption Price per Unit when
Units are tendered for redemption, such authority has been delegated to the
Evaluator which determines the price per Unit on a daily basis. The Redemption
Price per Unit is the pro rata share of each Unit in a Trust determined on the
basis of (i) the cash on hand in such Trust or monies in the process of being
collected, (ii) the value of the Bonds in such Trust based on the bid prices of
the Bonds (including "when issued" contracts, if any) and (iii) interest
accrued thereon, less (a) amounts representing taxes or other governmental
charges payable out of such Trust and (b) the accrued expenses of such Trust.
The Evaluator may determine the value of the Bonds in a Trust by employing any
of the methods set forth in "Public Offering -- Offering Price."

     The price at which Units may be redeemed could be less than the price paid
by the Unitholder and may be less than the par value of the Bonds represented
by the Units so redeemed. As stated above, the

                                       38

<PAGE>


Trustee may sell Bonds to cover redemptions. When Bonds are sold, the size of
the affected Trust will be, and the diversity may 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 right of redemption may be suspended and payment postponed for any
period during which the New York Stock Exchange is closed, other than for
customary weekend and holiday closings, or during which the Securities and
Exchange Commission determines that trading on that Exchange is restricted or
an emergency exists, as a result of which disposal or evaluation of the Bonds
in a Trust is not reasonably practicable, or for such other periods as the
Securities and Exchange Commission may by order permit. The Trustee is not
liable to any person in any way for any loss or damage which may result from
any such suspension or postponement.

TRUST ADMINISTRATION

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

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

     PORTFOLIO ADMINISTRATION. The Trustee is empowered to sell, for the
purpose of redeeming Units tendered by any Unitholder, and for the payment of
expenses for which funds may not be available, such of the Bonds designated by
the Sponsor as the Trustee in its sole discretion may deem necessary. The
Sponsor, in designating such Bonds, will consider a variety of factors,
including (i) interest rates, (ii) market value and (iii) marketability. The
Sponsor may direct the Trustee to dispose of Bonds in the event there is a
decline in price or the occurrence of other market or credit factors, including
advance refunding (i.e., the issuance of refunding securities and the deposit
of the proceeds thereof in trust or escrow to retire the refunded securities on
their respective redemption dates), so that in the opinion of the Sponsor the
retention of such Securities would be detrimental to the interest of the
Unitholders.

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

     If any default in the payment of principal or interest on any Bond occurs
and no provision for payment is made therefor within 30 days, the Trustee is
required to notify the Sponsor thereof. If the

                                       39

<PAGE>


Sponsor fails to instruct the Trustee to sell or to hold such Bond within 30
days after notification by the Trustee to the Sponsor of such default, the
Trustee may in its discretion sell the defaulted Bond and not be liable for any
depreciation or loss thereby incurred.

     AMENDMENT OR TERMINATION. The Sponsor and the Trustee have the power to
amend the Trust Agreement without the consent of any of the Unitholders when
such an amendment is (i) to cure an ambiguity or to correct or supplement any
provision of the Trust Agreement which may be defective or inconsistent with
any other provision contained therein or (ii) to make such other provisions as
shall not adversely affect the interest of the Unitholders (as determined in
good faith by the Sponsor and the Trustee), provided that the Trust Agreement
may not be amended to increase the number of Units issuable thereunder or to
permit the deposit or acquisition of obligations either in addition to or in
substitution for any of the Bonds initially deposited in a Trust, except for
the substitution of certain refunding obligations for such Bonds, for
Replacement Bonds and for subsequent deposits (see "The Fund"). In the event of
any amendment requiring the consent of Unitholders, the Trustee is obligated to
notify promptly all Unitholders of the substance of such amendment.

     A Trust may be terminated at any time by consent of Unitholders
representing 66-2/3% of the Units of such Trust then outstanding or by the
Trustee when the value of such Trust, as shown by any semi-annual evaluation,
is less than the minimum value indicated under "Summary of Essential Financial
Information." A Trust will be liquidated by the Trustee in the event that a
sufficient number of Units not yet sold are tendered for redemption by the
Underwriters, including the Sponsor, so that the net worth of such Trust would
be reduced to less than 40% of the initial principal amount of such Trust. If a
Trust is liquidated because of the redemption of unsold Units by the
Underwriters, the Sponsor will refund to each purchaser of Units the entire
sales charge paid by such purchaser.

     The Trust Agreement provides that a Trust shall terminate upon the
redemption, sale or other disposition of the last Bond held in such Trust, but
in no event shall it continue beyond the end of the year preceding the fiftieth
anniversary of the Trust Agreement. In the event of termination of a Trust,
written notice thereof will be sent by the Trustee to each Unitholder of such
Trust at his address appearing on the registration books of the Trust
maintained by the Trustee, such notice specifying the time or times at which
the Unitholder may surrender his certificate or certificates, if any were
issued, for cancellation. Within a reasonable time thereafter the Trustee shall
liquidate any Bonds then held in such Trust and shall deduct from the funds of
such Trust any accrued costs, expenses or indemnities provided by the Trust
Agreement, including estimated compensation of the Trustee and costs of
liquidation and any amounts required as a reserve to provide for payment of any
applicable taxes or other governmental charges. The sale of Bonds in a Trust
upon termination may result in a lower amount than might otherwise be realized
if such sale were not required at such time. For this reason, among others, the
amount realized by a Unitholder upon termination may be less than the principal
amount or par amount of Bonds represented by the Units held by such Unitholder.
The Trustee shall then distribute to each Unitholder his or her share of the
balance of the Interest and Principal Accounts. With such distribution the
Unitholders shall be furnished a final distribution statement of the amount
distributable. At such time as the Trustee in its sole discretion shall
determine that any amounts held in reserve are no longer necessary, it shall
make distribution thereof to Unitholders in the same manner.

     LIMITATION ON LIABILITIES. The Sponsor, the Evaluator, the Distributor and
the Trustee shall be under no liability to Unitholders for taking any action or
for refraining from taking any action in good faith pursuant to the Trust
Agreement, or for errors in judgment, but shall be liable only for their own
willful misfeasance, bad faith or gross negligence in the performance of their
duties or by reason of their reckless disregard of their obligations and duties
thereunder. 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

                                       40

<PAGE>


the failure of the Sponsor to act under the Trust Agreement, the Trustee may
act thereunder and shall not be liable for any action taken by it in good faith
under the Trust Agreement.

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

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

     SPONSOR. Delaware Management Company, Inc. is the Sponsor of the Fund and
Delaware Distributors, L.P. is the primary Distributor of Fund Units. Both the
Sponsor and Distributor are indirect, wholly owned subsidiaries of Lincoln
National Corporation ("LNC"). LNC, headquartered in Fort Wayne, Indiana, owns
and operates insurance and investment management businesses, including Delaware
Management Holdings, Inc. ("DMH"). Affiliates of DMH serve as adviser,
distributor and transfer agent for the Delaware Group of Mutual Funds.

     As of December 31, 1997, affiliates of DMH, including the Sponsor, had
assets under management of approximately $40 billion in mutual fund and
institutional accounts, and served as investment adviser to 106 mutual fund
portfolios. The principal business address for the Sponsor is One Commerce
Square, Philadelphia, Pennsylvania 19103; the principal business address for
the Distributor is 1818 Market Street, Philadelphia, Pennsylvania 19103. (This
paragraph relates only to the Sponsor and not to the Fund or to any Series
thereof. The information is included herein only for the purpose of informing
investors as to the financial responsibility of the Sponsor and its ability to
carry out its contractual obligations. More detailed information will be made
available by the Sponsor upon request.)

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

     EVALUATOR. Muller Data Corporation serves as Evaluator. The Evaluator may
resign or be removed by the Sponsor in which event the Sponsor is to use its
best efforts to appoint a satisfactory successor. Such resignation or removal
shall become effective upon acceptance of appointment by the successor
evaluation. If upon resignation of the Evaluator no successor has accepted
appointment within 30 days after notice of resignation, the Evaluator may apply
to a court of competent jurisdiction for the appointment of a successor. Notice
of such resignation or removal and appointment shall be mailed by the Trustee
to each Unitholder.

     TRUSTEE. The Trustee is The Chase Manhattan Bank, with its principal
executive office located at 270 Park Avenue, New York, New York 10017 and its
unit investment trust office at 4 New York Plaza, 6th Floor, New York, New York
10004-2413. The Trustee is subject to supervision 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.

                                       41

<PAGE>


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

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

     Under the Trust Agreement, the Trustee or any successor trustee may resign
and be discharged of the Trusts created by the Trust Agreement by executing an
instrument in writing and filing the same with the Sponsor. The Trustee or
successor trustee must mail a copy of the notice of resignation to all
Unitholders then of record, not less than 60 days before the date specified in
such notice when such resignation is to take effect. The Sponsor upon receiving
notice of such resignation is obligated to appoint a successor trustee
promptly. If, upon such resignation, no successor trustee has been appointed
and has accepted the appointment within 30 days after notification, the
retiring Trustee may apply to a court of competent jurisdiction for the
appointment of a successor. The Sponsor may remove the Trustee and appoint a
successor trustee as provided in the Trust Agreement. Notice of such removal
and appointment shall be mailed to each Unitholder by the Sponsor. Upon
execution of a written acceptance of such appointment by such successor
trustee, all the rights, powers, duties and obligations of the original trustee
shall vest in the successor. The resignation or removal of a Trustee becomes
effective only when the successor trustee accepts its appointment as such or
when a court of competent jurisdiction appoints a successor trustee.

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

UNDERWRITING

     The Underwriters named below have severally purchased Units in the
following respective amounts from the Distributor.

<TABLE>
<CAPTION>
                                                                              OREGON      NATIONAL
                                                                              INSURED     INSURED
                    NAME                                 ADDRESS              SERIES 7    SERIES 5
- -------------------------------------------     ------------------------      --------    --------
<S>                                             <C>                            <C>        <C>
Delaware Distributors, L.P.                     1818 Market Street             144,434    192,591
                                                Philadelphia, PA 19103

Edward D. Jones                                 12555 Manchester Road           10,000
                                                St. Louis, MO 63131

Fidelity Capital Markets                        164 Northern Avenue, ZT3                   10,000
  A Division of National Financial              Boston, MA 02210
   Services Corporation

Total Units                                                                    154,434    202,591
                                                                               =======    =======
</TABLE>

     Units may also be sold to broker-dealers and others at prices representing
the per Unit concession or agency commission stated under "Public Offering --
Unit Distribution." However, resales of Units by

                                       42

<PAGE>


such broker-dealers and others to the public will be made at the Public
Offering Price described in the Prospectus. The Sponsor and the Distributor
each reserves the right to reject, in whole or in part, any order for the
purchase of Units and the right to change the amount of the concession or
agency commission from time to time.

     At various times the Distributor may implement programs under which the
sales forces of Underwriters, brokers, dealers, banks and/or others may be
eligible to win nominal awards for certain sales efforts, or under which the
Distributor will reallow to any such Underwriters, brokers, dealers, banks
and/or others that sponsor sales contests or recognition programs conforming to
criteria established by the Distributor, or participate in sales programs
sponsored by the Distributor, an amount not exceeding the total applicable
sales charges on the sales generated by such person at the public offering
price during such programs. Also, the Distributor in its discretion may from
time to time pursuant to objective criteria established by the Distributor pay
fees to qualifying Underwriters, brokers, dealers, banks or others for certain
services or activities which are primarily intended to result in sales of Units
of the Trusts. Such payments are made by the Distributor out of its own assets,
and not out of the assets of the Trusts. These programs will not change the
price Unitholders pay for their Units or the amount that the Trusts will
receive from the Units sold.

OTHER MATTERS

     LEGAL OPINIONS. The legality of the Units offered hereby and certain
matters relating to Federal and state tax law have been passed upon by Chapman
and Cutler, 111 West Monroe Street, Chicago, Illinois 60603, as counsel for the
Sponsor. Carter, Ledyard & Milburn will act as counsel for the Trustee and as
special New York tax counsel for the Trusts.

     INDEPENDENT AUDITORS. The statements of net assets, including the
schedules of investments, as of the opening of business on the Initial Date of
Deposit, appearing in this Prospectus and Registration Statement have been
audited by Ernst & Young LLP, independent auditors, as set forth in their
report appearing elsewhere herein, and are included in reliance upon such
report given upon the authority of such firm as experts in accounting and
auditing.

DESCRIPTION OF BOND RATINGS*

     STANDARD & POOR'S. A brief description of the applicable Standard & Poor's
ratings symbols and their meanings follows:

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

     The bond 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.


- ------------------
*As published by the ratings companies.

                                       43

<PAGE>


     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 - Bonds rated AAA have 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 higher rated categories.

     Plus (+) or Minus (-): The ratings from "AA" to "BBB" may be modified by
the addition of a plus or minus sign to show relative standing within the major
rating categories.

     Provisional Ratings: The letter "p" indicates that the rating is
provisional. A provisional rating assumes the successful completion of the
project being financed by 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. The
investor should exercise his/her own judgment with respect to such likelihood
and risk.

     Credit Watch: Credit Watch highlights potential changes in ratings of
bonds and other fixed income securities. It focuses on events and trends which
place companies and government units under special surveillance by S&P's
180-member analytical staff. These may include merges, voter referendums,
actions by regulatory authorities, or developments gleaned from analytical
reviews. Unless otherwise noted, a rating decision will be made within 90 days.
Issues appear on Credit Watch where an event, situation, or deviation from
trends occurred and needs to be evaluated as to its impact on credit ratings. A
listing, however, does not mean a rating change is inevitable. Since S&P
continuously monitors all of its ratings, Credit Watch is not intended to
include all issues under review. Thus, rating changes will occur without issues
appearing on Credit Watch.

     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 of the best quality. They
carry the smallest degree of investment risk and are generally referred to as
"gilt edge." Interest payments are protected

- ------------------
**Bonds insured by Financial Guaranty Insurance Company, AMBAC Indemnity
  Corporation, Municipal Bond Investors Assurance Corporation, Connie Lee
  Insurance Company, Financial Security Assurance and Capital Guaranty Insurance
  Company are automatically rated "AAA" by Standard & Poor's.

                                       44

<PAGE>


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 fluctuation of
protective elements may be of greater amplitude or there may be other elements
present which make the long term risks appear somewhat larger than in Aaa
securities. Their market value is virtually immune to all but money market
influences, with the occasional exception of oversupply in a few specific
instances.

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

     A 1 and Baa 1 - Bonds which are rated A 1 and Baa 1 offer the maximum in
security within their quality group, can be bought for possible upgrading in
quality, and additionally, afford the investor an opportunity to gauge more
precisely the relative attractiveness of offerings in the market place.

     Baa - Bonds which are rated Baa are considered as medium grade obligation;
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 will move in parallel with Aaa, Aa, and A obligations during periods
of economic normalcy, except in instances of oversupply.

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

     Con.(---) - Bonds for which the security depends upon the completion of
some act or the fulfillment of some condition are rated conditionally. These
are bonds secured by (a) earnings of projects under construction, (b) earnings
of projects unseasoned in 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.

                                       45

<PAGE>


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

- --------------------------------------------------------------------------------
TABLE OF CONTENTS

TITLE                                  PAGE
- -----                                  ----
SUMMARY OF ESSENTIAL
  FINANCIAL INFORMATION ............      3
THE FUND ...........................      5
INVESTMENT OBJECTIVES AND
  PORTFOLIO SELECTION ..............      6
THE TRUSTS .........................      7
INDEPENDENT AUDITORS' REPORT .......     12
STATEMENTS OF NET ASSETS ...........     13
EQUIVALENT TAXABLE ESTIMATED
  CURRENT RETURNS ..................     18
RISK FACTORS .......................     19
ESTIMATED CURRENT RETURN AND
  ESTIMATED LONG-TERM RETURN .......     24
TRUST OPERATING EXPENSES ...........     25
INSURANCE ON THE BONDS IN THE
  INSURED TRUSTS ...................     26
TAX STATUS .........................     27
PUBLIC OFFERING ....................     31
RIGHTS OF UNITHOLDERS ..............     35
TRUST ADMINISTRATION ...............     39
UNDERWRITING .......................     42
OTHER MATTERS ......................     43
DESCRIPTION OF BOND RATINGS ........     43

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

UIT-FIPR13 1/98


                              P R O S P E C T U S

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

                               January 22, 1998




                                DELAWARE GROUP
                               TAX-EXEMPT TRUST,
                                   SERIES 13

                                OREGON INSURED
                                   SERIES 7

                               NATIONAL INSURED
                                   SERIES 5




================================================================================

                              DELAWARE MANAGEMENT
                                 COMPANY, INC.
                              ONE COMMERCE SQUARE
                       PHILADELPHIA, PENNSYLVANIA 19103




                         PLEASE RETAIN THIS PROSPECTUS
                             FOR FUTURE REFERENCE.

<PAGE>


                       CONTENTS OF REGISTRATION STATEMENT

         This Registration Statement on Form S-6 comprises the following papers
and documents:
              The facing sheet of Form S-6
              The Cross-Reference Sheet
              The Prospectus
              The signatures

The following exhibits:

1.1           Standard Terms and Conditions of Trust - Delaware-Voyageur
              Tax-Exempt Trust Series 10 and certain Subsequent Series
              (incorporated by reference to Amendment No. 1 to Form S-6 (File
              No. 333-27095) filed on behalf of Delaware-Voyageur Tax-Exempt
              Trust, Series 10).

1.2           Form of Trust Indenture and Agreement for Delaware Group
              Tax-Exempt Trust, Series 13.

2.            Opinion of counsel to the Sponsor as to legality of the securities
              being registered including a consent to the use of its name under
              the headings "Tax Status" and "Legal Opinions" in the Prospectus
              and opinion of counsel as to Federal income tax status of the
              securities being registered and certain state tax matters.

3.1           Opinion of counsel as to New York income tax status of securities
              being registered.

3.2           Opinion of counsel as to advancement of funds by Trustee.

4.            Not applicable.

5.            Financial Data Schedules filed hereto electronically as Exhibit(s)
              27 pursuant to Rule 401 of Regulation S-T.

6.            Written Consents.
                  (a) Consent of Muller Data Corporation.
                  (b) Consent of Ernst & Young LLP.

<PAGE>


                                   SIGNATURES

         The Registrant, Delaware Group Tax-Exempt Trust, Series 13, hereby
identifies Delaware-Voyageur Tax-Exempt Trust, Series 1, Delaware-Voyageur
Tax-Exempt Trust, Series 3 and Delaware-Voyageur Tax-Exempt Trust, Series 4 for
purposes of the representations required by Rule 487 and represents the
following: (1) that the portfolio securities deposited in the series with
respect to which this Registration Statement is being filed do not differ
materially in type or quality from those deposited in such previous series; (2)
that, except to the extent necessary to identify the specific portfolio
securities deposited in, and to provide essential financial information for, the
series with respect to which this Registration Statement is being filed, this
Registration Statement does not contain disclosures that differ in any material
respect from those contained in the registration statements for such previous
series as to which the effective date was determined by the Securities and
Exchange Commission or the staff; and (3) that it has complied with Rule 460
under the Securities Act of 1933.

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant, Delaware Group Tax-Exempt Trust, Series 13, has duly caused this
Amendment No. 1 to the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Philadelphia and State of
Pennsylvania on the 22nd day of January, 1998.

                                       DELAWARE GROUP TAX-EXEMPT
                                        TRUST, SERIES 13
                                          (Registrant)

                                       By: Delaware Management Company, Inc.
                                                    (Depositor)

                                       By: Wayne A. Stork
                                          President, Chief Executive Officer and
                                          Chief Investment Officer

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below on by the following person in the
capacity indicated and on September 18, 1997.

            SIGNATURE                        TITLE

WAYNE A. STORK                     President, Chief Executive Officer
- --------------------------           and Chief Investment Officer
Wayne A. Stork

<PAGE>


DAVID K. DOWNES                    Executive Vice President, Chief Operating
- --------------------------           Officer, Chief Financial Officer
David K. Downes                      and Treasurer

GEORGE M. CHAMBERLAIN, JR.
- --------------------------
George M. Chamberlain, Jr.         Senior Vice President, Secretary and Director

RICHARD G. UNRUH
- --------------------------
Richard G. Unruh                   Director




                              MEMORANDUM OF CHANGES

                   DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13

         The Prospectus filed with Amendment No. 1 of the Registration Statement
on Form S-6 has been revised to reflect information regarding the deposit of
bonds on January 22, 1998, and to set forth certain statistical data based
thereon.

         COVER PAGE. The series number and the Trusts in the Fund have been
         added. Information relating to the sales charge and the price of the
         offering if the units were available for purchase at the opening of
         business on the Initial Date of Deposit is set forth in the "Public
         Offering Price" section.

         PAGE 3.      The "Summary of Essential Financial Information" table has
                      been completed.

         PAGES 7-17.  The following information for the Trusts appears on the
                      pages indicated:

                      Summary data regarding the composition of the portfolio of
                      the Trusts.

                      Information regarding special State risk factors.

                      The opinion of Special Counsel to the Fund for State tax
                      matters.

                      The Portfolio for the Trusts.

         PAGES 7-11.  Oregon Insured Series 7.

         PAGE 11.     National Insured Series 5.

         PAGE 12.     The Independent Auditors' Report has been completed.

         PAGE 13.     The Statements of Net Assets have been completed.

         PAGES 14-17. The Schedules of Investments and Notes to Schedules of
                      Investments has been completed.

         PAGE 33.     In the section "Offering Price," the differences between
                      the offering side evaluations and the bid side evaluations
                      of the Bonds in the Trusts have been set forth.

<PAGE>


         PAGE 34.     The dealer concession has been set forth in the "Public
                      Offering" section.

         PAGE 34.     The percentage of the aggregate principal amount of the
                      Securities in the Trusts in which the Sponsor or
                      affiliates of the Sponsor have participated as
                      underwriters or members of the underwriting syndicate has
                      been set forth in the "Sponsor and Underwriter
                      Compensation" section.

         PAGE 42.     The "Underwriting" section has been completed.

         BACK COVER   The Series numbers, the Trusts in the Fund and the date of
                      the Prospectus have been included.




                                                                     Exhibit 1.2

                         DELAWARE GROUP TAX-EXEMPT TRUST
                                    SERIES 13
                                 TRUST AGREEMENT

                                                         Dated: January 22, 1998

         This Trust Agreement between Delaware Management Company, Inc., as
Depositor, Muller Data Corporation, as Evaluator and The Chase Manhattan Bank,
as Trustee, sets forth certain provisions in full and incorporates other
provisions by reference to the document entitled "Standard Terms and Conditions
of Trust for Delaware-Voyageur Tax-Exempt Trust, Series 10 and Certain
Subsequent Series, Effective May 22, 1997" (herein called the "STANDARD TERMS
AND CONDITIONS OF TRUST"), and such provisions as are set forth in full and such
provisions as are incorporated by reference constitute a single instrument. All
references herein to Articles and Sections are to Articles and Sections of the
Standard Terms and Conditions of Trust.

                                WITNESSETH THAT:

         In consideration of the premises and of the mutual agreements herein
contained, the Depositor and the Trustee agree as follows:

                                     PART I
                     STANDARD TERMS AND CONDITIONS OF TRUST

         Subject to the Provisions of Part II hereof, all the provisions
contained in the Standard Terms and Conditions of Trust are herein incorporated
by reference in their entirety and shall be deemed to be a part of this
instrument as fully and to the same extent as though said provisions had been
set forth in full in this instrument.

                                     PART II
                      SPECIAL TERMS AND CONDITIONS OF TRUST

         The following special terms and conditions are hereby agreed to:

                  (a) The Bonds defined in Article I listed in Schedule A hereto
         have been deposited in Trust under this Trust Agreement.

                  (b) All references to Voyageur Fund Managers, Inc. in the
         Standard Terms and Conditions of Trust shall be amended to refer to
         Delaware Management Company, Inc.

<PAGE>


         IN WITNESS WHEREOF, Delaware Management Company, Inc. has caused this
Trust Agreement to be executed by its Assistant Vice President and Assistant
Secretary, Muller Data Corporation has caused this Trust Agreement to be signed
by its Chief Operating Officer and The Chase Manhattan Bank has caused this
Trust Agreement to be executed by one of its Vice Presidents all as of the day,
month and year first above written.

                                  DELAWARE MANAGEMENT COMPANY, INC.,
                                    Depositor


                                  By: Michael D. Mabry
                                      ------------------------------------------
                                Assistant Vice President and Assistant Secretary



                                  MULLER DATA CORPORATION, Evaluator


                                  By: Ron Valinoti
                                      ------------------------------------------


                                  THE CHASE MANHATTAN BANK, Trustee

                                  By: Robert Ionescu
                                      ------------------------------------------

<PAGE>


                          SCHEDULE A TO TRUST AGREEMENT

                         SECURITIES INITIALLY DEPOSITED
                                       IN
                   DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13

(Note:   Incorporated herein and made a part hereof are the "SCHEDULES OF
         INVESTMENTS" as set forth in the Prospectus.)




                                                                     Exhibit 3.1


                                January 22, 1998


Delaware Management Company, Inc.
One Commerce Square
Philadelphia, Pennsylvania  19103


         Re:      Delaware Group Tax-Exempt Trust, Series 13

Ladies/Gentlemen:

         We have served as special counsel for Delaware Management Company,
Inc., as Sponsor and Depositor (the "DEPOSITOR") of Delaware Group Tax-Exempt
Trust, Series 13 (the "FUND"), in connection with the preparation, execution and
delivery of a Trust Agreement dated January 22, 1998 between Delware Management
Company, Inc., as Depositor, Muller Data Corporation, as Evaluator, and The
Chase Manhattan Bank, as Trustee, pursuant to which the Depositor has delivered
to and deposited the bonds listed in Schedule A to the Trust Agreement with the
Trustee and pursuant to which the Trustee has issued in the name of the
Depositor documents representing units of fractional undivided interest in and
ownership of the Fund created under said Trust Agreement.

         In connection therewith we have examined such pertinent records and
documents and matters of law as we have deemed necessary in order to enable us
to express the opinions hereinafter set forth.

         Based upon the foregoing, we are of the opinion that:

                  1. The execution and delivery of the Trust Agreement and the
         execution and issuance of certificates evidencing the units of the Fund
         have been duly authorized; and

                  2. The certificates evidencing the units of the Fund when duly
         executed and delivered by the Depositor and the Trustee in accordance
         with the aforementioned Trust Agreement, will constitute valid and
         binding obligations of the Fund and the Depositor in accordance with
         the terms thereof.

<PAGE>


         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement (File No. 333-44403) relating to the units referred to
above and to the use of our name and to the reference to our firm in said
Registration Statement and in the related Prospectus.

                                                         Respectfully submitted,



                                                         CHAPMAN AND CUTLER

MJK/slm




                                January 22, 1998


The Chase Manhattan Bank
4 New York Plaza
New York, New York  10004-2413

Delaware Management Company, Inc.
One Commerce Square
Philadelphia, Pennsylvania  19103


         Re:      Delaware Group Tax-Exempt Trust, Series 13

Ladies/Gentlemen:

         We have acted as special counsel for Delaware Management Company, Inc.,
Depositor of Delaware Group Tax-Exempt Trust, Series 13 (the "FUND"), in
connection with the issuance of units of fractional undivided interest in the
Fund, under a Trust Agreement dated January 22, 1998 (the "INDENTURE") between
Delaware Management Company, Inc., as Depositor, Muller Data Corporation, as
Evaluator, and The Chase Manhattan Bank, as Trustee.

         In this connection, we have examined the Registration Statement, the
form of Prospectus proposed to be filed with the Securities and Exchange
Commission, the Indenture and such other instruments and documents as we have
deemed pertinent. For purposes of the following opinions, it is assumed that
each asset of the Trust is debt the interest on which is excluded from gross
income for federal income tax purposes.

         Based upon the foregoing and upon an investigation of such matters of
law as we consider to be applicable, we are of the opinion that, under existing
Federal income tax law:

                   (i) Each Trust is not an association taxable as a corporation
         but will be governed by the provisions of subchapter J (relating to
         Trusts) of chapter 1, Internal Revenue Code of 1986 (the "CODE").

                  (ii) Each Unitholder will be considered as owning a pro rata
         share of each asset of the respective Trust in the proportion that the
         number of units of such Trust held by him bears to the total number of
         units outstanding of such Trust. Under subpart E, subchapter J of
         chapter 1 of the Code, income of the Trust will be treated as income of
         each Unitholder of the respective Trust in the proportion described,
         and

<PAGE>


         an item of Trust income will have the same character in the hands of a
         Unitholder as it would have in the hands of the Trustee. Accordingly,
         to the extent that the income of a Trust consists of interest and
         original issue discount excludable from gross income under Section 103
         of the Code, such income will be excludable from federal gross income
         of the Unitholders, except in the case of a Unitholder who is a
         substantial user (or a person related to such user) of a facility
         financed through issuance of any industrial development bonds or
         certain private activity bonds held by the respective Trust. In the
         case of such Unitholder who is a substantial user (and no other)
         interest received with respect to his units attributable to such
         industrial development bonds or such private activity bonds is
         includible in his gross income. To the extent a Trust holds bonds that
         are "specified private activity bonds" within the meaning of Section
         57(a)(5) of the Code, a Unitholder's pro rata portion of the income on
         such Bonds will be included as an item of tax preference in the
         computation of the alternative minimum tax applicable to all taxpayers
         (including non-corporate taxpayers) subject to the alternative minimum
         tax. Moreover, in the case of certain corporations, interest on all of
         the Bonds is included in computing the alternative minimum tax pursuant
         to Section 56(c) of the Code, and the branch profits tax imposed by
         section 884 of the Code with respect to U.S. branches of foreign
         corporations.

                 (iii) Gain or loss will be recognized to a Unitholder upon
         redemption or sale of his Units. Such gain or loss is measured by
         comparing the proceeds of such redemption or sale with the adjusted
         basis of the Units represented by his Certificate. If a Bond is
         acquired with accrued interest, that portion of the price paid for the
         accrued interest is added to the tax basis of the Bond. When this
         accrued interest is received, it is treated as a return of capital and
         reduces the tax basis of the Bond. If a Bond is purchased for a
         premium, the amount of the premium is added to the tax basis of the
         Bond. Bond premium is amortized over the remaining term of the Bond,
         and the tax basis of the Bond is reduced each tax year by the amount of
         the premium amortized in that tax year. Accordingly, Unitholders must
         reduce the tax basis of their Units for their share of accrued interest
         received by the respective Trust, if any, on Bonds delivered after the
         Unitholders pay for their Units to the extent that such interest
         accrued on such Bonds before the date the Trust acquired ownership of
         the Bonds (and the amount of this reduction may exceed the amount of
         accrued interest paid to the seller) and, consequently, such
         Unitholders may have an increase in taxable gain or reduction in
         capital loss upon the disposition of such Units. In addition, such
         basis will be increased by the Unitholder's aliquot share of the
         accrued original issue discount (and market discount, if the Unitholder
         elects to include market discount in income as it accrues) with respect
         to each bond held by a Trust with respect to which there was an
         original issue discount at the time the bond was issued (or which was
         purchased with market discount) and reduced by the annual amortization
         of bond premium, if any, on bonds held by such Trust.

                  (iv) If the Trustee disposes of a Trust asset (whether by
         sale, payment on maturity, redemption or otherwise) gain or loss is
         recognized to the Unitholder and

<PAGE>


         the amount thereof is measured by comparing the Unitholder's aliquot
         share of the total proceeds from the transaction with his basis for his
         fractional interest in the asset disposed of. Such basis is ascertained
         by apportioning the tax basis for his Units among each of the Trust
         assets (as of the date on which his units were acquired) ratably
         according to their values as of the valuation date nearest the date on
         which he purchased such Units. A Unitholder's basis in his Units and of
         his fractional interest in each Trust asset must be reduced by the
         amount of his aliquot share of accrued interest received by the Trust,
         if any, on Bonds delivered after the Unitholders pay for their Units to
         the extent that such interest accrued on the Bonds before the date the
         Trust acquired ownership of the Bonds (and the amount of this reduction
         may exceed the amount of accrued interest paid to the seller) must be
         reduced by the annual amortization of bond premium, if any, on Bonds
         held by the Trust and will be increased by the Unitholder's share of
         the accrued original issue discount (and market discount, if the
         Unitholder elects to include market discount in income as it accrues)
         with respect to each bond which, at the time the Bond was issued, had
         original issue discount (or which was purchased with market discount).

                   (v) In the case of any Bond held by a Trust where the "stated
         redemption price at maturity" exceeds the "issue price", such excess
         shall be original issue discount. With respect to each Unitholder, upon
         the purchase of his Units subsequent to the original issuance of bonds
         held by the Trust, Section 1272(a)(7) of the Code provides for a
         reduction in the accrued "daily portion" of such original issue
         discount upon the purchase of a Bond subsequent to the Bond's original
         issue, under certain circumstances. In the case of any Bond held by a
         Trust the interest on which is excludable from gross income under
         Section 103 of the Code, any original issue discount which accrues with
         respect to the Bonds will be treated as interest which is excludable
         from gross income under Section 103 of the Code.

                  (vi) We have examined the Municipal Bond Unit Investment Trust
         Insurance Policies, if any, issued to the Trust on the Date of Deposit
         by AMBAC Indemnity Corporation, Financial Guaranty Insurance
         Corporation or a combination thereof. Each such policy, or a
         combination of such policies, insures all Bonds held by the Trustee for
         that particular Trust (other than Bonds described in paragraph (vii))
         against default in the prompt payment of principal and interest. In our
         opinion, any amount paid under each said policy, or a combination of
         said policies, which represents maturing interest on defaulted
         Obligation held by the Trustee will be excludable from Federal gross
         income if, and to the same extent as, such interest would have been so
         excludable if paid in normal course by the Issuer of the defaulted
         Bonds provided that, at the time such policies are purchased, the
         amounts paid for such policies are purchased the amounts paid for such
         policies are reasonable, customary and consistent with the reasonable
         expectation that the issuer of the Bonds, rather than the insurer will
         pay debt service on the Bonds. Paragraph (ii) of this opinion is
         accordingly applicable to such payment.

<PAGE>


                 (vii) Certain Bonds in the portfolios of the Trusts have been
         insured by the issuers, underwriters, the Sponsor or others against
         default in the prompt payment of principal and interest (the "Insured
         Bonds"). Such bonds are so designated on the portfolio pages in the
         Prospectus for each Trust. Insurance has been obtained for such Insured
         Bonds, or, in the case of commitment, the Bonds will be ultimately
         insured under the terms of such an insurance policy, which are
         designated as Issuer. Insured Bonds on the portfolio pages of the
         respective Trusts in the Prospectus for the Fund, by the Issuers of
         such Insured Bonds. Insurance on Insured Bonds is effective so long as
         such Insured Bonds remain outstanding. For each of these Insured Bonds,
         we have been advised that the aggregate principal amount of such
         Insured Bonds listed on the portfolio page was acquired by the
         applicable Trust and are part of the series of such Insured Bonds in
         the listed aggregate principal amount. Based upon the assumption that
         the Insured Bonds of the Trust are part of a series covered by an
         insurance policy, it is our opinion that any amounts received by the
         applicable Trust representing maturing interest on such Insured Bonds
         will be excludable from Federal gross income if, and to the same extent
         as, such interest would have been so excludable if paid in normal
         course by the issuer notwithstanding that the source of the payment is
         from policy proceeds provided that, at the time such policies are
         purchased, the amounts paid for such policies are reasonable, customary
         and consistent with the reasonable expectation that the issuer of the
         Insured Bonds, rather than the insurer will pay debt service on the
         Insured Bonds. Paragraph (ii) of this opinion is accordingly applicable
         to such payment representing maturing interest.

         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.

         Except with respect to those Trusts that hold "specified private
activity bonds" within the meaning of Section 57 (a)(5) of the Code issued on or
after August 8, 1986 as identified in the Prospectus related hereto (the "AMT
Trusts"), the Trusts do not include any specified private activity bonds and
accordingly none of the interest income of the Trusts (other than the AMT
Trusts, if any) shall be treated as an item of tax preference when computing the
alternative minimum tax. Because the AMT Trusts include "specified private
activity bonds," all or a portion of the income of the AMT Trusts shall be
treated as an item of tax preference for alternative minimum tax purposes. In
the case of corporations, for taxable years beginning after December 31, 1986,
the alternative minimum tax and the Superfund Tax depend upon the corporation's
alternative minimum taxable income ("AMTI"), which is the corporation's taxable
income with certain adjustments.

         Pursuant to Section 56(c) of the Code, one of the adjustment items used
in computing AMTI of a corporation (other than an S Corporation, Regulated
Investment Company, Real Estate Investment Trust or REMIC) for taxable years
beginning after 1989, is an amount equal to 75% of the excess of such
corporation's "adjusted current earnings" over an amount

<PAGE>


equal to its AMTI (before such adjustment item and the alternative tax net
operating loss deduction). "Adjusted current earnings" includes all tax-exempt
interest, including interest on all bonds in the Trusts, and tax-exempt original
issue discount.

         Effective for tax returns filed after December 31, 1987, all taxpayers
are required to disclose to the Internal Revenue Service the amount of
tax-exempt interest earned during the year.

         Section 265 of the Code provides for a reduction in each taxable year
of 100 percent of the otherwise deductible interest on indebtedness incurred or
continued by financial institutions, to which either Section 585 or Section 593
of the Code applies, to purchase or carry obligations acquired after August 7,
1986, the interest on which is exempt from Federal income taxes for such taxable
year. Under rules prescribed by Section 265, the amount of interest otherwise
deductible by such financial institutions in any taxable year which is deemed to
be attributable to tax-exempt obligations acquired after August 7, 1986, will
generally be the amount that bears the same ratio to the interest deduction
otherwise allowable (determined without regard to Section 265) to the taxpayer
for the taxable year as the taxpayer's average adjusted basis (within the
meaning of Section 1016) of tax-exempt obligations acquired after August 7,
1986, bears to such average adjusted basis for all assets of the taxpayer. The
U.S. Treasury Department has proposed extending the financial institution rules
to all corporations.

         We also call attention to the fact that, under Section 265 of the Code,
interest on indebtedness incurred or continued to purchase or carry Units is not
deductible for Federal income tax purposes. Under rules used by the Internal
Revenue Service for determining when borrowed funds are considered used for the
purpose of purchasing or carrying particular assets, the purchase of Units may
be considered to have been made with borrowed funds even though the borrowed
funds are not directly traceable to the purchase of Units. However, these rules
generally do not apply to interest paid on indebtedness incurred for
expenditures of a personal nature such as a mortgage incurred to purchase or
improve a personal residence.

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

<PAGE>


redemption of his or her Units, unless a Unitholder elects to include market
discount in taxable income as it accrues.

We have also examined certain laws of the State of Oregon, to determine their
applicability to Oregon Insured Series 7 (the "OREGON TRUST") being created as
part of the Fund and to the holders of Units in the Oregon Trust who are
residents of the State of Oregon ("OREGON UNITHOLDER"). The assets of the Oregon
Trust will consist of interest-bearing obligations issued by or on behalf of the
State of Oregon (the "STATE") or counties, municipalities, authorities or
political subdivisions thereof ("OREGON BONDS") or by the Commonwealth of Puerto
Rico, Guam and the United States Virgin Islands (the "POSSESSION BONDS")
(collectively the "BONDS"). Neither the sponsor nor its counsel have
independently examined the bonds to be deposited for and held as the Oregon
Trust. However, although no opinion is expressed herein regarding such matters,
it is assumed that: (i) the Bonds were validly issued, (ii) the interest thereon
is excludible from gross income for federal income tax purposes and (iii)
interest on the Bonds, if received directly by a Unitholder, would be exempt
from the Oregon income tax applicable to individuals, ("OREGON PERSONAL INCOME
TAX"). The opinion set forth below does not address the taxation of persons
other than full time residents of Oregon. We have assumed that, 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, we
have assumed that, with respect to the Oregon Bonds, bond counsel to the issuing
authorities rendered opinions that the interest on the Oregon Bonds is exempt
from the Oregon Income Tax and, with respect to the Possession Bonds, bond
counsel to the issuing authorities rendered opinions that the Possession Bonds
and the interest therein is exempt from all state and local income taxation.
Neither the Sponsor nor its counsel has made any review for the Oregon Trust of
the proceedings relating to the issuance of the Bonds or of the bases for the
opinions rendered in connection therewith.

         Based on the foregoing, and based on review and consideration of
existing laws of the State as of this date and based on the assumptions set
forth above, it is our opinion and we herewith advise you, as follows:

                   (1) The Oregon Trust is not an association taxable as a
         corporation and based upon an administrative rule of the Oregon State
         Department of Revenue, each Oregon Unitholder of the Trust will be
         essentially treated as the owner of a PRO RATA portion of the Oregon
         Trust and the income of such portion of the Oregon Trust will be
         treated as the income of the Oregon Unitholder for Oregon Personal
         Income Tax purposes;

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

<PAGE>


                   (3) To the extent that interest derived from the Oregon Trust
         by an Oregon Unitholder with respect to the Possession Bonds is
         excludable from gross income for Federal income tax purposes pursuant
         to 48 U.S.C. ss.745, 48 U.S.C. ss.1423a and 48 U.S.C. ss.1403, such
         interest will not be subject to the Oregon Personal Income Tax;

                   (4) Each Oregon Unitholder of the Oregon Trust will recognize
         gain or loss for Oregon Personal Income Tax purposes if the Trustee
         disposes of a bond (whether by redemption, sale or otherwise) or if the
         Oregon Unitholder redeems or sells Units of the Oregon Trust to the
         extent that such a transaction results in a recognized gain or loss to
         such Oregon Unitholder for Federal income tax purposes; and

                   (5) The Oregon Personal Income Tax does not permit a
         deduction of interest paid or incurred on indebtedness incurred or
         continued to purchase or carry Units in the Oregon Trust, the interest
         on which is exempt from such Tax.

         We have not examined any of the Bonds to be deposited and held in the
Oregon Trust or the proceedings for the issuance thereof or the opinions of bond
counsel with respect thereto, and therefore express no opinion as to the
exemption from the Oregon Personal Income Tax of interest on the Bonds if
received directly by a Unitholder. In addition, prospective purchasers subject
to the Oregon corporate income tax should be advised that for purposes of the
Oregon Corporate Income (Excise) Tax, interest on the Oregon Bonds received by
the Oregon Trust and distributed to an Oregon Unitholder subject to such tax
will be added to the corporate Oregon Unitholder's federal taxable income and
therefore will be taxable. No opinion is expressed as to the treatment of
interest on the Possession Bonds for purposes of the Oregon Corporate Income
(Excise) Tax. No opinion is expressed regarding the Oregon taxation of foreign
or domestic insurance companies.


                                                              Very truly yours,


                                                              CHAPMAN AND CUTLER

MJK/slm




                                                                     Exhibit 3.3

                            CARTER, LEDYARD & MILBURN
                               COUNSELLORS AT LAW
                                  2 WALL STREET
                            NEW YORK, N.Y. 10005-2072


                                January 22, 1998


The Chase Manhattan Bank,
  as Trustee of
Delaware Group Tax-Exempt Trust,
  Series 13
Four New York Plaza
New York, New York  10004-2413

         Attn:    Mr. Thomas Porrazzo
                  Vice President


         Re:       Delaware Group Tax-Exempt Trust, Series 13, consisting of
                    Oregon Insured Series 7 and National Insured Series 5

Dear Sirs:

         We are acting as special counsel with respect to New York tax matters
for Delaware Group Tax-Exempt Trust, Series 13, which consists of Oregon Insured
Series 7 and National Insured Series 5 (each, a "Trust"), which will be
established under a certain Standard Terms and Conditions of Trust and a related
Trust Agreement each dated as of today (collectively, the "Indenture") between
Delaware Management Company, Inc., as Depositor (the "Depositor"), Muller Data
Corporation, as Evaluator, and The Chase Manhattan Bank, as Trustee (the
"Trustee"). Pursuant to the terms of the Indenture, units of fractional
undivided interest in the Trust (the "Units") will be issued in the aggregate
number set forth in the Indenture.

         We have examined and are familiar with originals or certified copies,
or copies otherwise identified to our satisfaction, of such documents as we have
deemed necessary or appropriate for the purpose of this opinion. In giving this
opinion, we have relied upon the two opinions, each dated today and addressed to
the Trustee, of Chapman and Cutler, counsel for the Depositor, with respect to
the matters of law set forth therein.

         Based upon the foregoing, we are of the opinion that:

<PAGE>


         1. The Trust will not constitute an association taxable as a
corporation under New York law, and accordingly will not be subject to the New
York State franchise tax or the New York City general corporation tax.

         2. Under the income tax laws of the State and City of New York, the
income of the Trust will be considered the income of the holders of the Units.

         We consent to the filing of this opinion as an exhibit to the
Registration Statement (No. 333-44403) filed with the Securities and Exchange
Commission with respect to the registration of the sale of the Units and to the
references to our name under the captions "Taxation" and "Legal Opinions" in
such Registration Statement and the preliminary prospectus included therein.

                                                       Very truly yours,

                                                       CARTER, LEDYARD & MILBURN

SFL:tbm




                                                                     Exhibit 3.4

                            CARTER, LEDYARD & MILBURN
                               COUNSELLORS AT LAW
                                  2 WALL STREET
                            NEW YORK, N.Y. 10005-2072


                                January 22, 1998


The Chase Manhattan Bank,
  as Trustee of
Delaware Group Tax-Exempt Trust,
  Series 13
Four New York Plaza
New York, New York  10004-2413

         Attn:    Mr. Thomas Porrazzo
                  Vice President


         Re:       Delaware Group Tax-Exempt Trust, Series 13, consisting of
                    Oregon Insured Series 7 and National Insured Series 5

Dear Sirs:

         We are acting as counsel for The Chase Manhattan Bank ("Chase") in
connection with the execution and delivery of a Standard Terms and Conditions of
Trust and a related Trust Agreement each dated as of today (collectively, the
"Indenture"), between Delaware Management Company, Inc., as Depositor (the
"Depositor"), Muller Data Corporation, as Evaluator, and Chase, as Trustee (the
"Trustee"), establishing Delaware Group Tax-Exempt Trust, Series 13, which
consists of Oregon Insured Series 7 and National Insured Series 5 (each, a
"Trust"), and the confirmation by Chase, as Trustee under the Indenture, that it
has registered on the registration books of the Trust the ownership by the
Depositor of a number of units constituting the entire interest in the
respective Trust (such aggregate units being herein called "Units"), each of
which Units represents an undivided interest in the Trust, which consists of
tax-exempt municipal obligations (including confirmation of contracts for the
purchase of certain obligations not yet delivered and cash, cash equivalents or
an irrevocable letter of credit in the amount required for such purchase upon
the receipt of such obligations), such obligations being defined in the
Indenture as Securities and referenced in the schedules to the Indenture.

         We have examined the Indenture, the Closing Memorandum delivered today
by the parties to the Indenture (the "Closing Memorandum"), and such other
documents as we have

<PAGE>


deemed necessary in order to render this opinion. Based on the foregoing, we are
of the opinion that:

         1. Chase is a duly organized and existing corporation having the powers
of a trust company under the laws of the State of New York.

         2. The Indenture has been duly executed and delivered by Chase and,
assuming due execution and delivery by the other parties thereto, constitutes
the valid and legally binding obligation of Chase.

         3. Chase, as Trustee, has registered on the registration books of the
Trust the ownership of the Units by the Depositor. Upon receipt of confirmation
of the effectiveness of the registration statement for the sale of the Units
filed with the Securities and Exchange Commission under the Securities Act of
1933, the Trustee may cause the Units to be registered in such names as the
Depositor may request, to or upon the order of the Depositor, as provided in the
Closing Memorandum.

         4. Chase, as Trustee, may lawfully advance amounts to the Trust and may
be reimbursed, without interest, for any such advances from funds in the
interest and capital accounts, as provided in the Indenture.

         In rendering the foregoing opinion, we have not considered, among other
things, whether the Securities have been duly authorized and delivered.

                                                       Very truly yours,

                                                       CARTER, LEDYARD & MILBURN

SFL:gcm




                                                                    EXHIBIT 6(a)

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

         We consent to the reference to our firm under the caption "Independent
Auditors" and to the use of our report dated January 22, 1998 in this Amendment
No. 1 to the Registration Statement (Form S-6 No. 333-44403) and related
Prospectus of Delaware Group Tax-Exempt Trust, Series 13 dated January 22, 1998.



                                                               ERNST & YOUNG LLP


Philadelphia, Pennsylvania
January 22, 1998




                                                                    Exhibit 6(b)

                             Muller Data Corporation
                                395 Hudson Street
                          New York, New York 10014-3622


January 22, 1998


Delaware Management Company, Inc.
One Commerce Square
Philadelphia, Pennsylvania  19103


         Re:      Delaware Group Tax-Exempt Trust, Series 13 (the "Fund")

Gentlemen:

         We have examined the Registration Statement File No. 333-44403 for the
above captioned Fund.

         We hereby acknowledge that Muller Data Corporation is currently acting
as the Evaluator for the Fund. We hereby consent to the use in the Registration
Statement of the reference to Muller Data Corporation as the Evaluator for the
above captioned Fund.

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

                                                         Sincerely,

                                                         Muller Data Corporation


<TABLE> <S> <C>


<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
PROSPECTUS AND IS QUALIFIED IN ITS ENTIRETY BE REFERENCE TO SUCH DOCUMENT.
</LEGEND>
<CIK> 0001042756
<NAME> DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13
<SERIES>
   <NUMBER> 1
   <NAME> NATIONAL INSURED SERIES 5
       
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</TABLE>

<TABLE> <S> <C>


<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
PROSPECTUS AND IS QUALIFIED IN ITS ENTIRETY BE REFERENCE TO SUCH DOCUMENT.
</LEGEND>
<CIK> 0001042756
<NAME> DELAWARE GROUP TAX-EXEMPT TRUST, SERIES 13
<SERIES>
   <NUMBER> 2
   <NAME> OREGON INSURED SERIES 7
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
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<PERIOD-START>                             JAN-22-1998
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<INVESTMENTS-AT-VALUE>                       1,468,672
<RECEIVABLES>                                        0
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<OTHER-ITEMS-ASSETS>                            15,681
<TOTAL-ASSETS>                               1,484,353
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
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<SHARES-COMMON-STOCK>                          154,434
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</TABLE>


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