An abbreviation for the Control Substances Act. Congress enacted the Comprehensive Drug Abuse Prevention and Control Act. Title II of that Act, the CSA, repealed most of the earlier antidrug laws in favor of a comprehensive regime to combat the international and interstate traffic in illicit drugs. The main objectives of the CSA were to conquer drug abuse and to control the legitimate and illegitimate traffic in controlled substances. Congress was particularly concerned with the need to prevent the diversion of drugs from legitimate to illicit channels. Congress devised a closed regulatory system making it unlawful to manufacture, distribute, dispense, or possess any controlled ...