720 ILCS 5/16-25

(a) A person commits retail theft when he or she knowingly: (1) Takes possession of, carries away, transfers or causes to be carried away or transferred, any merchandise displayed, held, stored or offered for sale in a retail mercantile establishment with the intention of retaining such merchandise or with the intention of depriving the merchant permanently of the possession, use or benefit of such merchandise without paying the full retail value of such merchandise; or (2) Alters, transfers, or removes any label, price tag marking, indicia of value or any other markings which aid in determining value affixed to any merchandise; or (3) Transfers any merchandise displayed, held, stored or offered for sale in a retail mercantile establishment from the container in or on which such merchandise is displayed to any other container with the intention of depriving the merchant of the full retail value.

(f) Sentence. (1) Retail theft of property whose value does not exceed $300 is a Class A misdemeanor. (2) A person who has been convicted of retail theft of property not exceeding $300 who has previously been convicted of any type of theft, robbery, armed robbery, burglary, residential burglary, possession of burglary tools or home invasion is guilty of a Class 4 felony. (3) Retail theft of property whose full retail value exceeds $300 in any single transaction, or in separate transactions committed by the same person within a period of one year, is a Class 3 felony. (4) Retail theft of property exceeding $300 using an emergency exit is a Class 2 felony.