Definition of Criminal Trespass To Real Property.

(a) In Illinois, a person commits criminal trespass to real property when he or she:

(1) knowingly and without lawful authority enters or remains within or on a building;

(2) enters upon the land of another, after receiving, prior to the entry, notice from the owner or occupant that the entry is forbidden;

(3) remains upon the land of another, after receiving notice from the owner or occupant to depart;

(3.5) presents false documents or falsely represents his or her identity orally to the owner or occupant of a building or land in order to obtain permission from the owner or occupant to enter or remain in the building or on the land;

(3.7) intentionally removes a notice posted on residential real estate as required by subsection (l) of Section 15-1505.8 of Article XV of the Code of Civil Procedure before the date and time set forth in the notice; or

(4) enters a field used or capable of being used for growing crops, an enclosed area containing livestock, an agricultural building containing livestock, or an orchard in or on a motor vehicle (including an off-road vehicle, motorcycle, moped, or any other powered two-wheel vehicle) after receiving, prior to the entry, notice from the owner or occupant that the entry is forbidden or remains upon or in the area after receiving notice from the owner or occupant to depart.

For purposes of item (1) of this subsection, this Section shall not apply to being in a building which is open to the public while the building is open to the public during its normal hours of operation; nor shall this Section apply to a person who enters a public building under the reasonable belief that the building is still open to the public.

Sentence.

A violation of subsection (a)(1), (a)(2), (a)(3), (a)(3.5) is a Class B misdemeanor.  A violation of subdivision (a)(4) is a Class A misdemeanor.

Definition of Criminal Trespass To Vehicles.

(a)  In Illinois, a person commits criminal trespass to vehicles when he or she knowingly and without authority enters any part of or operates any vehicle, aircraft, watercraft or snowmobile.

(b) Sentence.  Criminal trespass to vehicles is a Class A misdemeanor.