Sec. 1. (a) Except as provided in subsection (b), this chapter applies to all units except townships.
(b) A unit consisting of:
(1) two (2) or more townships; and
(2) at least one (1) municipality;
that has reorganized under IC 36-1.5 may exercise planning and zoning power under IC 36-7-4 if the unit's plan of reorganization under IC 36-1.5 authorizes the unit to exercise planning and zoning powers.