Drug scheduling became mandated under The Federal Comprehensive Drug Abuse Prevention and Control Act of 1970 (also known as the Controlled Substances Act). The law addresses controlled substances within Title II. Based upon this law, the United States Drug Enforcement Agency (DEA) maintains a list of controlled medications and illicit substances that are categorized from scheduled I to V. The five categories have their basis on the medication’s proper and beneficial medical use and the medication’s potential for dependency and abuse. The purpose of the law is to provide government oversight over the manufacturing and distribution of these types of substances. Prescribers and dispensers are required to have a DEA license to supply these drugs. The licensing provides links to users, prescribers, and distributors.