705 ILCS 35/2a
In any circuit, other than Cook County and the 23rd circuit, in which is situated any State institution providing educational or welfare facilities for more than 25,000 persons, 4 circuit judges shall be elected unless that circuit is entitled to a greater number under Section 2.
(from Ch. 37, par. 72.2a)
(Source: P.A. 97-1069, eff. 8-24-12.)