The systems of plane coordinates which have been established by the National Ocean Service/National Geodetic Survey (formerly the U. S. Coast and Geodetic Survey) or its successors for defining and stating the horizontal positions or locations of points on the surface of the earth within the State of Vermont are hereafter to be known and designated as the "Vermont Coordinate System 1927 and the Vermont Coordinate System 1983." The term "Vermont Coordinate System" is synonymous with the term "Vermont State Plane Coordinate System."  (Amended 1987, No. 169 (Adj. Sess.), § 1, eff. May 3, 1988; 2007, No. 164 (Adj. Sess.), § 38.)