625 ILCS 5/4-102

(a) It is a violation of this Chapter for: (1) A person, without authority to do so, to damage a vehicle or to damage or remove any part of a vehicle; (2) A person, without authority to do so, to tamper with a vehicle or go in it, on it, or work or attempt to work any of its parts, or set or attempt to set it in motion; (3) A person to fail to report a vehicle as unclaimed in accordance with the provisions of Section 4-107. (b) Sentence. A person convicted of a violation of this Section shall be guilty of a Class A misdemeanor. A person convicted of a violation of this Section a second or subsequent time, shall be guilty of a Class 4 felony.