(a) Counties, municipalities, and other political subdivisions are authorized, separately or jointly, to acquire, establish, construct, expand, own, lease, control, equip, improve, maintain, operate, regulate, and police airports and landing fields for the use of aircraft, either within or without the geographical limits of such counties, municipalities, and other political subdivisions, and may use for such purpose or purposes any available property that is owned or controlled by such counties, municipalities, or other political subdivisions.

(b) All counties in the State of Georgia which are located on the boundary line between the State of Georgia and any other state, as well as all municipalities and other political subdivisions which are located in such boundary counties, are authorized, separately, jointly with each other, or jointly with any county, municipality, or political subdivision of any such border state, to acquire, establish, construct, expand, own, lease, control, equip, improve, maintain, operate, regulate, and police airports and landing fields for the use of aircraft, either within or without the geographical limits of such border counties and the municipalities and other political subdivisions therein contained in the State of Georgia or within the geographical limits of any county, municipality, or political subdivision of any such border state other than the State of Georgia.