Indiana Code Title 36. Local Government § 36-7-4-612

Sec. 612. (a)  ADVISORY.  Each zoning ordinance and each amendment to it adopted under any prior statute are validated and continued in effect until amended or repealed by action of the legislative body taken under authority of the advisory planning law.  Each zoning ordinance has the same effect even though previously adopted as a comprehensive plan of land use or as a part of such a comprehensive plan.

(b) AREA.  Each zoning ordinance that:

remains in full force and shall be enforced by the planning department under the area planning law until superseded by the zoning ordinance adopted for the jurisdiction under section 606 of the area planning law.