Indiana Code Title 36. Local Government § 36-7-4-211

Sec. 211. (a) AREA.  Notwithstanding any other provision of the area planning law, the representation on any area plan commission may be changed by a similar ordinance adopted by the legislative body of each unit that is a participant in a planning department or by the legislative body of each unit that proposes to form a planning department.

(b) AREA.  Each ordinance adopted under this section must provide for at least one (1) representative from each unit that is a participant in the planning department.