76 Pa.C.S. § 1101: System.

(a) Establishment.--The most recent system of plane coordinates based on the National Spatial Reference System, known as the State Plane Coordinate System, which has been established by the National Geodetic Survey or its successors for defining and stating the horizontal and vertical positions or locations of points on the surface of the earth within this Commonwealth, shall be known as the Pennsylvania State Coordinate System.

(b) Parameters.--The defining parameters of the Pennsylvania State Coordinate System, including zone definitions, shall be defined and published by the National Geodetic Survey or its successors as a part of the overall State Coordinate System.

(c) Geodetic datums.--The official geodetic datums to which geodetic coordinates, including, but not limited to, latitude, longitude, ellipsoid height, orthometric height or dynamic height, are referenced within this Commonwealth shall be as defined for the National Spatial Reference System or its successors and may be accessed via the National Oceanic and Atmospheric Administration Continuously Operating Reference Stations Network.

(d) Previous versions.--Previous versions of the Pennsylvania State Coordinate System shall include the Pennsylvania Coordinate System of 1927 and the Pennsylvania Coordinate System of 1983 as specified by the act of June 2, 1937 (P.L.1208, No.310), entitled "An act to describe, define, and officially adopt a system of coordinates for designating the positions of points on the surface of the earth within the Commonwealth of Pennsylvania."