625 ILCS 5/1-217
Every device, in, upon or by which any person or property is or may be transported or drawn upon a highway or requiring a certificate of title under Section 3-101(d) of this Code, except devices moved by human power, devices used exclusively upon stationary rails or tracks, and snowmobiles as defined in the Snowmobile Registration and Safety Act.
For the purposes of this Code, unless otherwise prescribed, a device shall be considered to be a vehicle until such time it either comes within the definition of a junk vehicle, as defined under this Code, or a junking certificate is issued for it.
For this Code, vehicles are divided into 2 divisions:
First Division: Those motor vehicles which are designed for the carrying of not more than 10 persons.
Second Division: Those vehicles which are designed for carrying more than 10 persons, those designed or used for living quarters and those vehicles which are designed for pulling or carrying property, freight, or cargo and those motor vehicles of the First Division remodelled for use and used as motor vehicles of the Second Division.
625 ILCS 5/1-217