10 ILCS 5/14-4
The leading political party represented by a minority of all the commissioners in the board shall be entitled to 2 of the judges in each precinct with an even number, and 3 of the judges in each precinct with an odd number, and the other leading political party shall be entitled to 3 judges in the even and 2 judges in the odd number precincts; and if only 3 judges of election serve in each precinct, the leading political party represented by the minority of all the commissioners in the board shall be entitled to one of the judges of election in each precinct with an even number, and 2 of the judges of election in each precinct with an odd number, and the other leading political party shall be entitled to 2 judges of election in the even and one judge of election in the odd number precincts; and it shall be the duty of such commissioners to observe this division in all respects in making such appointments; except that this Section does not apply to appointments by county boards of election commissioners under Section 14-3.1.
10 ILCS 5/14-4