Building codes and health regulations shall include all applicable state and local provisions and shall cover all public and private construction and development in flood-prone areas, including, but not limited to, private homes, farm buildings, all buildings (except accessory buildings of under 200 square feet of floor space), streets, avenues, roadways, alleyways, and easements, electricity, water systems, and sewerage disposal systems. Such regulations may require that all proposed improvements and developments in flood-prone areas will:
(1) Properly elevate structures so as to assure protection from reasonably expected flooding;
(2) Design buildings so as to prevent flotation and collapse, giving special attention to the adequacy of foundations and to prevent damage to nonstructural elements;
(3) Provide for the protection of heating systems and other critical mechanical or electrical installations from damage by flooding;
(4) Not create unhealthful areas of pondage or accumulation of debris and obstacles in flooding situations;
(5) Provide adequate controls on the placement of septic tanks to avoid contamination during flooding;
(6) Provide adequate sewerage and water systems which will not be adversely affected by flooding; and
(7) Require and encourage flood proofing to the maximum extent practicable in connection with all proposed major improvements, repairs, and rehabilitations of existing structures.