Notwithstanding any other law:
1. All local governments with land use jurisdiction over any area of special flood hazard shall, and are authorized to, take any action necessary to achieve and maintain participation in the national flood insurance program.
2. Any local law or ordinance adopted for the purpose of qualifying a local government as a participant in the national flood insurance program shall apply to any construction or improvement undertaken within any such local government by any county, city, town, village, school district or public improvement district.