This act is supplemental to the authority granted by Kan. Stat. Ann. § 12-707, and amendments thereto, and any city empowered by this act to adopt zoning regulations for the area outside the city shall plan, adopt, amend, enforce and review zoning regulations in conformity with the provisions of article 7 of chapter 12 of the Kansas Statutes Annotated, and amendments thereto, insofar as such provisions can be made applicable.