50 ILCS 110/5
Notwithstanding any other provision of law, a unit of local government may not adopt an ordinance, referendum, or resolution that requires a member of the General Assembly to resign his or her office in order to be eligible to seek elected office in the unit of local government. Any ordinance, referendum, or resolution that contains such a provision is void.
A home rule unit may not regulate the eligibility requirements for those seeking elected office in the unit of local government in a manner inconsistent with this Section. This Section is a limitation under subsection (i) of Section 6 of Article VII of the Illinois Constitution on the concurrent exercise by home rule units of powers and functions exercised by the State.
This Section applies to ordinances, referenda, or resolutions adopted on or after November 8, 2016.
50 ILCS 110/5