In order to carry out the purposes of this chapter, all of the land within the boundaries of the Zoned Area and within three (3) miles of the landing area of the Airport, is divided into airport approach zones, airport turning zones and airport transition zones, the boundaries of which are shown on the Alexander Hamilton Airport Approved and Clear Zone Plan dated May 31, 1978, prepared by Bristol, Childs, Crowder and Associates, Inc., under FAA Project No. A-78–0002–01.