Indiana Code Title 36. Local Government § 36-9-32-10

Sec. 10. The state covenants and agrees with the owners of any bonds issued under this chapter that so long as any bonds of a municipality issued under this chapter are outstanding or unpaid, the state will not in any way impair the rights and remedies of the owners of the bonds, until the bonds, together with interest on them, interest on any unpaid installment of interest, and all costs and expenses in connection with any action or proceedings by or on behalf of the owners, are fully paid, met, and discharged.