— Data required to be included in maps or plats recorded with clerk of superior court, § 15-6-67. County nate System and Georgia Coordinate System of 1985; East and West Zones. Names of East and West Zones. Alternative plane coordinates for expressing location of a point for Georgia Coordinate System and Georgia Coordinate System of 1985. Description of land extending from one zone to another. Zones precisely defined. Recordation of coordinates of point prohibited unless connected by survey to monumented horizontal control station. Use of terms limited. Use of terms ‘‘Grid North, Georgia East Zone’’ and ‘‘Grid North, Georgia West Zone.’’ Conversion of distances between meters and feet. Use of system not mandatory. Validation of use of Georgia Coordinate System. Use of Georgia Coordinate System prohibited after January 1, 1990. surveyor, Ch. 7, T. 36. Professional engineers and land surveyors, Ch. 15, T. 43.