In this subtitle the following words have the meanings indicated. “Governing body” means: the county executive and county council of a charter county with a county executive; the county council of a charter county with no county executive; the board of county commissioners of a county; or the mayor and council, by whatever name known, of a municipal corporation. “National Capital Region” means the area defined under § 2674(f)(2) of Title 10 of the United States Code, including those counties with a border abutting that area and any municipal corporations in those counties.