The zoning jurisdiction of the county is hereby declared to be all unincorporated areas in the county, except within the police jurisdiction of any municipality and the area within two miles of an airport owned or operated by a municipality when said municipality exercises or declares its intention to exercise zoning control over these areas; provided, that when by local acts the jurisdiction of zoning regulations is limited to the corporate limits of a city, this chapter shall not confer any further territorial jurisdiction on such city or its planning board or boards.
The zoning jurisdiction of any municipality, zoning under the authority of this chapter, may include, in addition to the corporate area of said municipality, the area within the police jurisdiction of such municipality and the area lying within two miles of the boundary of any airport owned or operated by said municipality; except, that where a local act limits the territorial jurisdiction of a city planning board to the corporate limits of a city, this chapter limits zoning jurisdiction to such corporate limits.
The provisions of this section shall not apply to counties having a population of not less than 54,500 nor more than 56,000 according to the most recent federal decennial census.
Ala. Code § 4-6-4 (1975)