10 ILCS 5/11-7
For the purpose of the conduct of any consolidated election, consolidated primary election, special municipal primary election or emergency referendum, an election authority may cluster up to four contiguous precincts as provided in this Section, which shall constitute a clustered voting zone. The common polling place for the clustered voting zone shall be located within the territory comprising the clustered precincts. Unless the election authority specifies a larger number, only one election judge shall be appointed for each of the precincts in each clustered voting zone.
The judges so appointed may not all be affiliated with the same political party.
The conduct of an election in a clustered voting zone shall be under the general supervision of all the judges of election designated to serve in the clustered voting zone. The designated judges may perform the duties of election judges for the entire clustered voting zone. However, the requirements of Section 17-14 shall apply to voter assistance, the requirements of Section 24-10 shall apply to voter instruction, the requirement of Section 24A-10 shall apply to examination of vote by mail ballots, and any disputes as to entitlement to vote, challenges, counting of ballots or other matters pertaining directly to voting shall be decided by those designated judges appointed for the precinct in which the affected voter resides or the disputed vote is to be counted.
This Section does not apply to any elections in municipalities with more than 1,000,000 inhabitants.
10 ILCS 5/11-7