"Participating unit of local government" means a unit of local government which has entered into an intergovernmental agreement or contract with a county for the administrative adjudication of violations of its ordinances by the county pursuant to this Division.
"System of administrative adjudication" means the adjudication of any violation of a county ordinance or of a participating unit of local government's ordinance, except for (i) proceedings not within the statutory or the home rule authority of counties or a participating unit of local government; and (ii) any offense under the Illinois Vehicle Code (or a similar offense that is a traffic regulation governing the movement of vehicles and except for any reportable offense under Section 6-204 of the Illinois Vehicle Code).
"Unit of local government" has the meaning as defined in the Illinois Constitution of 1970 and also includes a not-for-profit corporation organized for the purpose of conducting public business including, but not limited to, the Northeast Illinois Regional Commuter Railroad Corporation.
55 ILCS 5/5-43010