(a) The government of no municipality of this state may annex to the existing corporate limits of such municipality any unincorporated area in which water, sewerage, police protection, fire protection, and garbage or refuse collection is furnished or is to be furnished by the county in which such unincorporated area is situated, or where the county has included such unincorporated area in a comprehensive zoning plan of the county, without first obtaining the approval of the governing authority of the county in which such unincorporated area is situated. Such approval must be obtained by an official act of the governing authority of the county and must be duly recorded upon the minutes of such body. The owner of any real property situated in such county shall have the right to enjoin any municipality which has not obtained the required approval of the governing authority of the county from exercising any municipal powers, functions, or duties over the unincorporated area improperly sought to be annexed to the existing corporate limits by an action for injunction filed in the superior court of the county in which the territory proposed for annexation is situated.

(b) The provisions of this Code section shall apply only to those counties of this state having a population of not less than 480,000 and not more than 580,000 according to the United States decennial census of 1980 or any future such census.