Indiana Code Title 36. Local Government § 36-7-4-611

Sec. 611. (a) Any ordinance adopted under the 600 series is presumed to have been adopted after due deliberation in regard to the facts upon which the comprehensive plan was formulated.

(b) AREA.  If a proposed zoning ordinance is adopted under section 606, 607, or 608 of this chapter by one (1) or more, but not all, of the participating legislative bodies, it has effect within the jurisdiction of each legislative body that adopted it.  The fact that the ordinance was based on a comprehensive plan developed for a larger territorial area does not affect its validity.  The plan commission may print the ordinance under section 610 of this chapter as it applies only to certain territorial areas, whenever that would be useful for its enforcement.