INSURED MUNICIPALS INCOME TRUST & IN QU TAX EX TR MUL SE 310, 497, 1999-03-08

INSURED MUNICIPALS INCOME TRUST & IN QU TAX EX TR MUL SE 310
497, 1999-03-08

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             INSURED MUNICIPALS INCOME TRUST AND INVESTORS' QUALITY
                       TAX-EXEMPT TRUST, MULTI-SERIES 310


                          SUPPLEMENT TO THE PROSPECTUS

         Notwithstanding anything to the contrary in the prospectus, effective
March 9, 1999, the concession or agency commission allowed to broker-dealers and
selling agents in connection with the distribution of Units of Tennessee
Investors' Quality Tax-Exempt Trust, Series 1 during the initial offering period
will be equal to the total sales charge applicable to the related transaction.


Dated: March 9, 1999