Indiana Code Title 20. Education § 20-49-4-15

Sec. 15. (a) Money advanced to a school corporation or charter school for a school building construction program may be advanced for a period not exceeding twenty-five (25) years.  The school corporation or charter school to which money is advanced must pay interest on the advance.  For advances made before July 1, 1993, the state board may provide, either before an advance is made or before an advance is fully paid, that the payment of the advance may not be prepaid by more than six (6) months.  For advances made after June 30, 1993, for school building construction programs, the state board may provide that the advances are prepayable at any time.

(b) The state board of finance shall periodically establish the rate or rates of interest payable on advances for school building construction programs as long as: