(720 ILCS 550/4) (from Ch. 56 1/2, par. 704)
    Sec. 4. It is unlawful for any person knowingly to possess cannabis. Any person who violates this section with respect to:
        (a) not more than 2.5 grams of any substance
    
containing cannabis is guilty of a Class C misdemeanor;
        (b) more than 2.5 grams but not more than 10 grams of
    
any substance containing cannabis is guilty of a Class B misdemeanor;
        (c) more than 10 grams but not more than 30 grams of
    
any substance containing cannabis is guilty of a Class A misdemeanor; provided, that if any offense under this subsection (c) is a subsequent offense, the offender shall be guilty of a Class 4 felony;
        (d) more than 30 grams but not more than 500 grams of
    
any substance containing cannabis is guilty of a Class 4 felony; provided that if any offense under this subsection (d) is a subsequent offense, the offender shall be guilty of a Class 3 felony;
        (e) more than 500 grams but not more than 2,000 grams
    
of any substance containing cannabis is guilty of a Class 3 felony;
        (f) more than 2,000 grams but not more than 5,000
    
grams of any substance containing cannabis is guilty of a Class 2 felony;
        (g) more than 5,000 grams of any substance containing
    
cannabis is guilty of a Class 1 felony.
(Source: P.A. 90-397, eff. 8-15-97.)