Section 113(4) in The Maharashtra Municipal Corporations Act, 1949
(4)When any part of a sinking fund is invested in debentures issued by the Corporation or is applied in paying off any part of a loan before the period fixed for repayment, the interest which would otherwise have been payable on such debentures or on such part of the loan shall be paid into the sinking fund and invested in the manner laid down in sub-section (1).