Indiana Code Title 36. Local Government § 36-9-23-16

Sec. 16. (a) A municipality that does not have a sewage treatment plant, and wants to acquire, construct, improve, operate, and maintain sewage works other than a sewage treatment plant, may proceed under this chapter only if it first contracts for the required treatment of the sewage emanating from its works.

(b) A municipality owning and operating facilities for sewage treatment may contract to treat all or part of the sewage of:

The contracts must be authorized by ordinance and are subject to approval by the department of environmental management according to rules adopted by the environmental rules board as to the sufficiency of the provision for sewage treatment.

(c) Unless otherwise provided in the authorizing ordinance or governing indenture, the revenues received by the owner under the contract are considered a part of the revenues of the owner's sewage treatment facilities, and shall be applied in accordance with the applicable statutes.

(d) The necessary intercepting and connecting sewers and appurtenances to connect the sewage treatment facilities and sewage works of the contracting parties may be constructed in part or in whole by either of the contracting parties, as provided in the contract.  For a municipality, the money to pay for this construction may be provided by the issuance of bonds under the applicable statutes, as part of the cost of the facilities or works of the respective parties.

(e) All bonds issued under this section are payable before the expiration date of the contract.  The parties may contract for the terms of the bonds, and for any term or terms beyond the last maturity of the bonds.