Indiana Code Title 36. Local Government § 36-10-9-17

Sec. 17. Unless their rights are restricted by the appropriate bond resolution, ordinance, or trust agreement, any holder of notes or bonds (except pre-1981 general obligation bonds) issued under this chapter or a trustee under a trust agreement entered into under this chapter may, by any suitable form of legal proceeding, protect and enforce any rights provided under statute or granted by the bond resolution, ordinance, or trust agreement.