(10 ILCS 5/29C-5) (from Ch. 46, par. 29C-5; formerly Ch. 46, par. 811)
Sec. 29C-5. Three Groups of Legislative Districts.
The 59 legislative districts of this State are divided into 3 groups for the purpose of establishing the terms of Senators elected from each group. The districts in each group are distributed substantially equally over the State. The 3 groups shall consist of 20, 20 and 19 legislative districts, respectively, with each group having as its first district number, one of the numbers 1, 2 or 3, and shall be comprised of other district numbers, as follows:
1 2 3
4 5 6
7 8 9
10 11 12
13 14 15
16 17 18
19 20 21
22 23 24
25 26 27
28 29 30
31 32 33
34 35 36
37 38 39
40 41 42
43 44 45
46 47 48
49 50 51
52 53 54
55 56 57
58 59
(Source: P.A. 87-1052.)