(a) The Legislature hereby finds and declares that it is imperative that municipalities and counties in this state be fully authorized and empowered to take all action necessary to comply with the requirements of the National Flood Insurance Act of 1968 (Public Law 91-152), as amended by the Congress of the United States through February 15, 1975; that municipalities presently are vested with all statutory power and authority necessary in this regard; and that the purpose of this section is to authorize and empower the several counties of this state to comply with such requirements.

(b) As used in this section:

(1) "Act" means the National Flood Insurance Act of 1968 (Public Law 91-152), as amended by the Congress of the United States through February 15, 1975; and

(2) "Specified area or areas" means the area or areas specified under such act as a flood plain or mudslide area or areas within which control over construction and improvements must be exercised in order to comply with such act.

(c) To the extent and only to the extent necessary to comply with the eligibility requirements of and otherwise fully and in all respects to comply with the requirements of such act, the county commission of each county is hereby authorized and empowered to (i) adopt, administer and enforce building codes for a specified area or areas within such county, which building codes may establish different requirements for different specified areas; (ii) require and issue building permits for all proposed construction or other improvements in such county: Provided, That nothing contained in this subdivision (ii) shall authorize a county commission to refuse to issue a building permit for any proposed construction or other improvement outside of a specified area or areas within such county; (iii) conduct inspections of construction and other improvements in a specified area or areas within such county and (iv) otherwise take such action and impose such requirements regarding land use and control measures in a specified area or areas within such county as shall be necessary under such act: Provided, That no such building code adopted by a county commission shall apply within nor any authority hereinabove granted exercised by a county commission within the corporate limits of any municipality which has taken appropriate action to comply with such act, unless and until such municipality so provides by ordinance. Any such building code adopted by a county commission and any other requirements imposed by a county commission under the provisions of this subsection (c) may be enforced by injunctive action in the circuit court of the county.

(d) The power and authority conferred upon county commissions in this section is supplemental to and not in derogation of any power and authority heretofore or hereafter conferred by law upon county commissions.