U.S. Code / Title 21 — Food and Drugs / Chapter 13—Drug Abuse Prevention and Control / Subchapter I—Control and EnforcementTitle 21PartPart B—Authority To Control; Standards and SchedulesContents§ 811. Authority and criteria for classification of substances§ 812. Schedules of controlled substances§ 813. Treatment of controlled substance analogues§ 814. Removal of exemption of certain drugs