Ill. Admin. Code tit. 92 § 14.1030
The designation of aircraft as Ultralights or Ultralight Trainers, and any other provisions contained in this Subpart J, shall in no way nullify any state laws that presently prohibit the landing or takeoff of Ultralights or Ultralight Trainers from any public highway. These restrictions shall apply to aircraft designated as Ultralights or Ultralight Trainers, except those Ultralights or Ultralight Trainers owned or operated by the United States government, the state of Illinois and political subdivisions, and Ultralights or Ultralight Trainers being used for medical emergencies. This Part shall not be interpreted nor is it intended to interfere with any city, village or county ordinances that may restrict the uncertificated area from which an Ultralight or Ultralight Trainer may takeoff and/or land within the jurisdiction of the local governmental agency.
Ill. Admin. Code tit. 92, § 14.1030