65 ILCS 5/11-1-12
A municipality may not require a police officer to issue a specific number of citations within a designated period of time. This prohibition shall not affect the conditions of any federal or State grants or funds awarded to the municipality and used to fund traffic enforcement programs.
A municipality may not, for purposes of evaluating a police officer's job performance, compare the number of citations issued by the police officer to the number of citations issued by any other police officer who has similar job duties. Nothing in this Section shall prohibit a municipality from evaluating a police officer based on the police officer's points of contact. For the purposes of this Section, "points of contact" means any quantifiable contact made in the furtherance of the police officer's duties, including, but not limited to, the number of traffic stops completed, arrests, written warnings, and crime prevention measures. Points of contact shall not include either the issuance of citations or the number of citations issued by a police officer.
A home rule municipality may not establish requirements for or assess the performance of police officers in a manner inconsistent with this Section. This Section is a denial and limitation of home rule powers and functions under subsection (g) of Section 6 of Article VII of the Illinois Constitution.
65 ILCS 5/11-1-12