Indiana Code Title 36. Local Government § 36-1-7-15

Sec. 15. (a) As used in this section, “economic development entity” means any of the following:

(b) Notwithstanding section 2 of this chapter, two (2) or more economic development entities may enter into a written agreement under section 3 of this chapter if the agreement is approved by each entity's governing body.

(c) A party to an agreement under this section may do one (1) or more of the following:

(d) An economic development entity may not grant to another entity the power to tax or to establish an allocation area under IC 8-22-3.5, IC 36-7-14-39, or IC 36-7-15.1.

(e) An agreement under this section does not have to comply with section 3(a)(5) or 4 of this chapter.

(f) An action to challenge the validity of an agreement under this section must be brought within thirty (30) days after the agreement has been approved by all the parties to the agreement.  After that period has passed, the agreement is not contestable for any cause.