The Controlled Substances Act (CSA) is the statute establishing federal U.S. drug policy under which the manufacture, importation, possession, use, and distribution of certain substances is regulated. It was passed by the 91st United States Congress as Title II of the Comprehensive Drug Abuse Prevention and Control Act of 1970 and signed into law by President Richard Nixon. The Act also served as the national implementing legislation for the Single Convention on Narcotic Drugs. The legislation created five schedules (classifications), with varying qualifications for a substance to be included in each. Two federal agencies, the Drug Enforcement Administration (DEA) and the Food and Drug Administration (FDA), determine which substances are added to or removed from the various schedules, although the statute passed by Congress created the initial listing. Congress has sometimes scheduled other substances through legislation such as the Hillory J. Farias and Samantha Reid Date-Rape Prevention Act of 2000, which placed gamma hydroxybutyrate (GHB) in Schedule I and sodium oxybate (the isolated sodium salt in GHB) in Schedule III. Classification decisions are required to be made on criteria including potential for abuse (an undefined term), currently accepted medical use in treatment in the United States, and international treaties. The nation first outlawed addictive drugs in the early 1900s and the International Opium Convention helped lead international agreements regulating trade. The Food and Drugs Act of 1906 was the beginning of over 200 laws concerning public health and consumer protections. Others were the Federal Food, Drug, and Cosmetic Act (1938), and the Kefauver Harris Amendment of 1962. In 1969, President Richard Nixon announced that the Attorney General, John N. Mitchell, was preparing a comprehensive new measure to more effectively meet the narcotic and dangerous drug problems at the federal level by combining all existing federal laws into a single new statute. With the help of White House Counsel head, John Dean; the Executive Director of the Shafer Commission, Michael Sonnenreich; and the Director of the BNDD, John Ingersoll creating and writing the legislation, Mitchell was able to present Nixon with the bill. The CSA not only combined existing federal drug laws and expanded their scope, but it also changed the nature of federal drug law policies and expanded Federal law enforcement pertaining to controlled substances.Title II, Part F of the Comprehensive Drug Abuse Prevention and Control Act of 1970 established the National Commission on Marijuana and Drug Abuse—known as the Shafer Commission after its chairman, Raymond P. Shafer—to study cannabis abuse in the United States. During his presentation of the commission's First Report to Congress, Sonnenreich and Shafer recommended the decriminalization of marijuana in small amounts, with Shafer stating, Rufus King notes that this stratagem was similar to that used by Harry Anslinger when he consolidated the previous anti-drug treaties into the Single Convention and took the opportunity to add new provisions that otherwise might have been unpalatable to the international community. According to David T. Courtwright, 'the Act was part of an omnibus reform package designed to rationalize, and in some respects to liberalize, American drug policy.' (Courtwright noted that the Act became, not libertarian, but instead repressionistic to the point of tyrannical, in its intent.) It eliminated mandatory minimum sentences and provided support for drug treatment and research. King notes that the rehabilitation clauses were added as a compromise to Senator Jim Hughes, who favored a moderate approach. The bill, as introduced by Senator Everett Dirksen, ran to 91 pages. While it was being drafted, the Uniform Controlled Substances Act, to be passed by state legislatures, was also being drafted by the Department of Justice; its wording closely mirrored the Controlled Substances Act.