The legislative body of every incorporated municipality in this State by whatsoever name known, and the governing authorities of the several counties, within those areas of the respective counties which lie without the boundaries of any such incorporated municipality therein, shall have power to establish conservation areas within said municipality and to define the boundaries thereof and to vest, for a period not exceeding five years, exclusive jurisdiction or authority to enforce, within any conservation area, such laws, ordinances, codes, rules and regulations, or portions or parts thereof, as the legislative body of said municipality may deem expedient in any suitable board, commission, department, bureau or agency of such municipality, which it is hereby empowered to create and establish for such purposes; provided that nothing contained in this section shall authorize any such board, commission, department, bureau or agency to conflict, impede, obstruct, hinder or interfere with the powers of the police commissioner, police department or police force of such municipality.

      For the purposes of this section the term "conservation area" shall mean any area within a municipality which the legislative body thereof shall find to be so affected by blight and community or property deterioration as to require comprehensive renovation and rehabilitation. Provided that, the provisions of this section shall not apply to Baltimore City. Nothing in this section shall be construed to apply to or affect Anne Arundel, Calvert, Howard, Kent, Wicomico, Worcester and Somerset counties.