Simple possession of AAS is a class C misdemeanor, subsequent violations are only a class B. The Ill statute specifically carves out ASS for a lower classifcation. See below.
§ 720 ILCS 570/402. [Possession of controlled or counterfeit substance]
Sec. 402. Except as otherwise authorized by this Act, it is unlawful for any person knowingly to possess a controlled or counterfeit substance or controlled substance analog. A violation of this Act with respect to each of the controlled substances listed herein constitutes a single and separate violation of this Act. For purposes of this Section, "controlled substance analog" or "analog" means a substance which is intended for human consumption, other than a controlled substance, that has a chemical structure substantially similar to that of a controlled substance in Schedule I or II, or that was specifically designed to produce an effect substantially similar to that of a controlled substance in Schedule I or II. Examples of chemical classes in which controlled substance analogs are found include, but are not limited to, the following: phenethylamines, N-substituted piperidines, morphinans, ecgonines, quinazolinones, substituted indoles, and arylcycloalkylamines. For purposes of this Act, a controlled substance analog shall be treated in the same manner as the controlled substance to which it is substantially similar.
(d) Any person who violates this Section with regard to any amount of anabolic steroid is guilty of a Class C misdemeanor for the first offense and a Class B misdemeanor for a subsequent offense committed within 2 years of a prior conviction.