Ill. Admin. Code tit. 17, § 135.70
a) Usage Permit
All vehicles being operated at an OHV site must have a permit issued by the Department and attached to the vehicle at all times while using the OHV site. The permit must be displayed on the vehicle and be at all times visible for inspection. Permits shall be sold by the Department and must be purchased at the OHV site. Permits may not be transferred between vehicles.