Ind. Code § 4-4-11-26
The authority, subject to any agreements with bondholders as may then exist, shall have power out of any funds available to purchase bonds of the authority, which shall thereupon be cancelled, at any reasonable price which, if the bonds are then redeemable, shall not exceed the redemption price then applicable plus accrued interest to the next interest payment on the bond.
As added by Acts 1982, P.L.16, SEC.1. Amended by P.L.11-1990, SEC.43.