Mich. Comp. Laws § 54.232

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