<DOCUMENT>
<TYPE>EX-99.(L)
<SEQUENCE>12
<FILENAME>file011.txt
<DESCRIPTION>OPINION AND CONSENT OF COUNCIL
<TEXT>


<PAGE>

                    SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP
                                FOUR TIMES SQUARE
                             NEW YORK, NY 10036-6522

                                     -------
                                 (212) 735-3000


                                October 28, 2002



BlackRock Insured Municipal Income Trust
100 Bellevue Parkway
Wilmington, Delaware 19809

                           Re:      BlackRock Insured Municipal Income Trust
                                    Registration Statement on Form N-2
                                    --------------------------------------------

Ladies and Gentlemen:

           We have acted as special counsel to BlackRock Insured Municipal
Income Trust, a statutory trust created under the Delaware Statutory Trust Act
(the "Trust"), in connection with the initial public offering by the Trust of up
to 27,000,000 shares (including shares subject to an over-allotment option) of
the Trust's common shares (the "Shares") of beneficial interest, par value
$0.001 per share (the "Common Shares").

           This opinion is being furnished in accordance with the requirements
of Item 24 of the Form N-2 Registration Statement under the Securities Act of
1933, as amended (the "1933 Act"), and the Investment Company Act of 1940, as
amended (the "1940 Act").

           In connection with this opinion, we have examined originals or
copies, certified or otherwise identified to our satisfaction, of (i) the
Notification of Registration of the Trust as an investment company under the
1940 Act, on Form N-8A, dated August 19, 2002, as filed with the Securities and
Exchange Commission (the "Commission") on August 19, 2002, (ii) the Registration
Statement of the Trust on Form N-2 (File Nos. 333-98357 and 811-21178), as filed
with the Commission on August 19, 2002 under the Securities Act of 1933, as
amended (the "1933 Act") and the 1940 Act, Pre-Effective Amendment No. 1
thereto, as filed with the Commission on September 5, 2002, Pre-Effective
Amendment No. 2 thereto, as filed with the Commission on September 24, 2002, and
Pre-Effective Amendment No. 3 thereto, to be filed with the Commission on
October 28, 2002, under the 1933 Act (such Registration Statement, as so amended
and proposed to be amended, being hereinafter referred to as the "Registration
Statement"); (iii) the form of the Underwriting Agreement (the "Underwriting
Agreement") proposed to be entered into between the Trust, as issuer, BlackRock
Advisors, Inc., as investment adviser to the Trust, BlackRock Financial
Management, Inc., as investment sub-adviser to the Trust, and Salomon Smith
Barney Inc., as representative of the several underwriters named



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BlackRock Insured Municipal Income Trust
October 28, 2002
Page 2

therein (the "Underwriters"), filed as an exhibit to the Registration Statement;
(iv) a specimen certificate representing the Common Shares; (v) the Corrected
Certificate of Trust, as filed with the Secretary of State of Delaware, and the
Amended and Restated Agreement and Declaration of Trust of the Trust, as
currently in effect; (vi) the Amended and Restated By-Laws of the Trust, as
currently in effect; (vii) certain resolutions of the Board of Trustees of the
Trust relating to the issuance and sale of the Shares and related matters; and
(viii) certain resolutions of the shareholders of the Trust adopted on October
21, 2002. We also have examined originals or copies, certified or otherwise
identified to our satisfaction, of such records of the Trust and such
agreements, certificates of public officials, certificates of officers or other
representatives of the Trust and others, and such other documents, certificates
and records as we have deemed necessary or appropriate as a basis for the
opinions set forth herein.

           In our examination, we have assumed the legal capacity of all natural
persons, the genuineness of all signatures, the authenticity of all documents
submitted to us as originals, the conformity to original documents of all
documents submitted to us as certified, conformed or photostatic copies and the
authenticity of the originals of such copies. In making our examination of
documents, we have assumed that the parties thereto, other than the Trust, had
or will have the power, corporate or other, to enter into and perform all
obligations thereunder and have also assumed the due authorization by all
requisite action, corporate or other, and execution and delivery by such parties
of such documents and the validity and binding effect thereof on such parties.
In rendering the opinion set forth below, we have assumed that the share
certificates representing the Shares will conform to the specimen examined by us
and will have been manually signed by an authorized officer of the transfer
agent and registrar for the Common Shares and registered by such transfer agent
and registrar. As to any facts material to the opinions expressed herein which
we have not independently established or verified, we have relied upon
statements and representations of officers and other representatives of the
Trust and others.

           Members of our firm are admitted to the bar in the State of Delaware
and we do not express any opinion as to the laws of any jurisdiction other than
the Delaware Statutory Trust Act.

           Based upon and subject to the foregoing, we are of the opinion that
the issuance and sale of the Shares will have been duly authorized when (i) the
Registration Statement becomes effective; (ii) the Underwriting Agreement has
been duly executed and delivered; (iii) certificates representing the Shares in
the form of the specimen certificate examined by us have been manually signed by
an authorized officer of the transfer agent and registrar for the Common Shares
and registered by such transfer agent and registrar; and (iv) the Shares have
been delivered to and paid for by the Underwriters at a price per share not less
than the per share par



<PAGE>
BlackRock Insured Municipal Income Trust
October 28, 2002
Page 3



value of the Common Shares as contemplated by the Underwriting Agreement, the
Shares will be validly issued, fully paid and nonassessable (except as provided
in the last sentence of Section 3.8 of the Agreement and Declaration of Trust).

           We hereby consent to the filing of this opinion with the Commission
as an exhibit to the Registration Statement. We also consent to the reference to
our firm under the caption "Legal Opinions" in the Registration Statement. In
giving this consent, we do not thereby admit that we are included in the
category of persons whose consent is required under Section 7 of the 1933 Act or
the rules and regulations of the Commission.

                              Very truly yours,

                              /s/ Skadden, Arps, Slate, Meagher & Flom LLP



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</DOCUMENT>
