Miss. Code Ann. § 89-6-1: Description of systems of plane coordinates.

(1) The systems of plane coordinates established and maintained 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 position or location of points on the surface of the earth within the State of Mississippi are hereafter to be known and designated as the Mississippi Coordinate System of 1927 (MCS’27) and the Mississippi Coordinate System of 1983 (MCS’83). These systems divide the area within the state into an “East Zone” and a “West Zone.”

(2) (a) The area now included in the following eastern counties shall constitute the East Zone: Alcorn, Attala, Benton, Calhoun, Chickasaw, Choctaw, Clarke, Clay, Covington, Forrest, George, Greene, Hancock, Harrison, Itawamba, Jackson, Jasper, Jones, Kemper, Lafayette, Lamar, Lauderdale, Leake, Lee, Lowndes, Marshall, Monroe, Neshoba, Newton, Noxubee, Oktibbeha, Pearl River, Perry, Pontotoc, Prentiss, Scott, Smith, Stone, Tippah, Tishomingo, Union, Wayne, Webster and Winston.

(b) The area now included in the following western counties shall constitute the West Zone: Adams, Amite, Bolivar, Carroll, Claiborne, Coahoma, Copiah, DeSoto, Franklin, Grenada, Hinds, Holmes, Humphreys, Issaquena, Jefferson, Jefferson Davis, Lawrence, Leflore, Lincoln, Madison, Marion, Montgomery, Panola, Pike, Quitman, Rankin, Sharkey, Simpson, Sunflower, Tallahatchie, Tate, Tunica, Walthall, Warren, Washington, Wilkinson, Yalobusha and Yazoo.

(3) When any survey extends from one (1) into the other of the above coordinate zones, the position of all points involved may be referred to either of the two (2) zones.