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(a) Where refunding bonds are to be issued by any municipality, county, state-supported educational institution, or improvement district of any kind and the bonds to be refunded cannot be presented for payment and cancellation simultaneously with the payment and delivery of the refunding bonds, the refunding bonds may be delivered when the purchase money is deposited into trust. The purchase money may be deposited for the purpose of payment of the principal of and interest on the bonds to be refunded with any insured bank or trust company in the state which is otherwise fully qualified to receive trust funds if the bonds to be refunded have fixed maturity dates of not to exceed twelve (12) months from the date of the payment and delivery of the refunding bonds or if the bonds are redeemable before maturity and have been duly called for payment.
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(b) If the bank or trust company is not the paying agent for the bonds to be refunded, the purchase money shall be paid over by it to the paying agent three (3) days before the maturity of the bonds or three (3) days before the date for which the bonds have been called for payment.
