Indiana Code Title 13. Environment § 13-26-5-7

Sec. 7. (a) Exclusive of building a sewage treatment plant, solid waste disposal or recovery system, or installing a supply of water, a district that desires to own, acquire, construct, equip, improve, enlarge, extend, operate, and maintain a works may proceed under this article if the district first contracts for:

(b) A governmental or private body owning and operating facilities for water supply, sewage, or solid waste disposal, recovery, or treatment may contract to supply water or treat all or part of the sewage and solid waste of a district.  The contracts must be authorized by ordinance.

(c) All bonds issued under this article or IC 13-3-2 (before its repeal) by a district contracting for:

under this section are payable before the expiration date of the contract, and districts may contract for the term of the bonds, including a term or terms beyond the last maturity of the bonds.