Congress enacts the Drug Abuse Control Amendments of 1965, expanding federal controls over depressants, stimulants, and hallucinogens and strengthening enforcement tools (a key step toward a unified federal drug-control framework later embedded in the CSA).
The Bureau of Drug Abuse Control (BDAC) is created within the FDA to investigate and enforce controls over certain “dangerous drugs” (notably stimulants and hallucinogens), reflecting rising concern about non-opiate drug use in the 1960s counterculture era.
The Narcotic Addict Rehabilitation Act (NARA) becomes law, expanding federal authority to commit certain opioid-addicted offenders to treatment as an alternative to traditional prosecution—an early federal attempt to integrate treatment into drug policy alongside enforcement.
Reorganization Plan No. 1 of 1968 takes effect, transferring major federal narcotics enforcement functions from Treasury (Bureau of Narcotics) and FDA drug-abuse enforcement functions to the Attorney General—setting up a consolidated enforcement structure.
The Bureau of Narcotics and Dangerous Drugs (BNDD) is established within the Department of Justice, merging federal narcotics enforcement with “dangerous drug” enforcement and foreshadowing the CSA’s emphasis on centralized scheduling and enforcement.
In Leary v. United States, the Supreme Court holds that key provisions of the Marihuana Tax Act effectively compelled self-incrimination, undermining the statute and increasing pressure for Congress to replace older, patchwork drug laws with a new comprehensive framework.
Representative Harley O. Staggers introduces H.R. 18583, which becomes the legislative vehicle for the Comprehensive Drug Abuse Prevention and Control Act of 1970—the umbrella law that would contain the Controlled Substances Act (Title II).
The House passes H.R. 18583 (precursor to the CSA), signaling broad bipartisan support for consolidating federal drug statutes into a single framework with standardized schedules and strengthened enforcement authorities.
The Senate passes the bill that would become the Comprehensive Drug Abuse Prevention and Control Act of 1970, reflecting the political momentum behind a unified national system for regulating and penalizing controlled substances.
President Richard Nixon signs Public Law 91-513, the Comprehensive Drug Abuse Prevention and Control Act of 1970. Title II (the Controlled Substances Act) establishes the modern federal scheduling system and consolidated authorities over manufacture, distribution, and possession.
The Controlled Substances Act takes effect, implementing the five-schedule classification system and the new regulatory and enforcement framework that replaced numerous earlier federal drug statutes.
President Nixon issues Executive Order 11599, establishing the Special Action Office for Drug Abuse Prevention to coordinate federal drug-abuse treatment, rehabilitation, education, and prevention efforts (separately from law enforcement), reinforcing the era’s dual-track strategy of enforcement plus treatment.
U.S. Drug Policy Changes Leading to the Controlled Substances Act (1965–1971)
