765 ILCS 225/3

    (765 ILCS 225/3) (from Ch. 133, par. 103)
    (Section scheduled to be repealed on January 1, 2025)
    Sec. 3.

For the purpose of the use of the Illinois Coordinate System,
the State is divided into an "East Zone" and a "West Zone".

The area now included in the following counties constitutes the "East Zone":
Boone, Champaign, Clark, Clay, Coles, Cook, Crawford, Cumberland, DeKalb,
DeWitt, Douglas, DuPage, Edgar, Edwards, Effingham, Fayette, Ford, Franklin,
Gallatin, Grundy, Hamilton, Hardin, Iroquois, Jasper, Jefferson, Johnson,
Kane, Kankakee, Kendall, Lake, LaSalle, Lawrence, Livingston, McHenry, McLean,
Macon, Marion, Massac, Moultrie, Piatt, Pope, Richland, Saline, Shelby,
Vermilion, Wabash, Wayne, White, Will and Williamson.

The area now included in the following counties constitutes the "West Zone":
Adams, Alexander, Bond, Brown, Bureau, Calhoun, Carroll, Cass, Christian,
Clinton, Fulton, Greene, Hancock, Henderson, Henry, Jackson, Jersey, Jo Daviess,
Knox, Lee, Logan, McDonough, Macoupin, Madison, Marshall, Mason, Menard,
Mercer, Monroe, Montgomery, Morgan, Ogle, Peoria, Perry, Pike, Pulaski,
Putnam, Randolph, Rock Island, St. Clair, Sangamon, Schuyler, Scott, Stark,
Stephenson, Tazewell, Union, Warren, Washington, Whiteside, Winnebago and Woodford.

(Source: P.A. 98-756, eff. 7-16-14. Repealed by P.A. 103-1029, eff. 1-1-25.)