Ind. Code § 36-10-11-26
(c) All interest or other income earned on these investments must first be used to pay the interest on the refunding bonds as it becomes due. Any excess becomes a part of and shall be held in the escrow fund. Any balance remaining in the escrow fund after redemption of all the bonds being refunded shall be deposited in the sinking fund established for the payment of the principal and interest on the refunding bonds.
As added by Acts 1982, P.L.218, SEC.5.