Ind. Code § 8-1.5-3-11
(c) "Surplus earnings" are those cash earnings remaining after provision has been made to take care of current obligations, including:
(f) A cash reserve fund, if authorized by ordinance, may be used to make loans to another utility owned by the same municipality, for periods not to exceed five (5) years, at any interest rate. The repayment of the loan and interest shall be returned to the cash reserve fund.
As added by Acts 1982, P.L.74, SEC.1.