Del. Code tit. 6, § 5501

The systems of plane coordinates which have been established by the National Ocean Service/National Geodetic Survey (formerly the United States Coast and Geodetic Survey) or its successors for defining and stating the geographic positions or locations of points on the surface of the Earth within the State are hereafter to be known and designated as the Delaware Coordinate System of 1927 and the Delaware Coordinate System of 1983, respectively.