Indiana Code Title 8. Utilities and Transportation § 8-1-2.2-15

Sec. 15. Remedies.  Any holder of bonds issued under the provisions of this chapter or any of the bond coupons, and the trustee under any trust agreements, except to the extent that his rights are restricted by the trust agreement or the resolution authorizing the issuance of the bonds, may, (a) either at law or in equity, by suit, action, or other proceeding, protect and enforce any and all rights under the laws of the state or, to the extent permitted by law, under the trust agreement or resolution authorizing the issuance of the bonds or under any agreement or other contract executed by the municipality or joint agency pursuant to this chapter, and (b) may enforce and compel the performance of all duties required by this chapter or by the trust agreement or resolution to be performed by any municipality or joint agency or by any officer of any municipality or joint agency, including the fixing, charging, and collecting of rents, rates, fees, and charges.