C.R.S. § 38-52-102

(1) As established for use in the north zone, the Colorado coordinate system of 1927 or the Colorado coordinate system of 1983 shall be named; and, in any land description in which it is used, it shall be designated the Colorado coordinate system of 1927 north zone or the Colorado coordinate system of 1983 north zone. (2) As established for use in the central zone, the Colorado coordinate system of 1927 or the Colorado coordinate system of 1983 shall be named; and, in any land description in which it is used, it shall be designated the Colorado coordinate system of 1927 central zone or the Colorado coordinate system of 1983 central zone. (3) As established for use in the south zone, the Colorado coordinate system of 1927 or the Colorado coordinate system of 1983 shall be named; and, in any land description in which it is used, it shall be designated the Colorado coordinate system of 1927 south zone or the Colorado coordinate system of 1983 south zone.