1947–1971: codes, criticism, and prior review. The Nuremberg Code (1947) and World Medical Association's Declaration of Helsinki (1964, revised in 1975) preceded Belmont. In the United States, Henry K. Beecher's 1966 article “Ethics and Clinical Research” documented ethically troubling studies in prominent institutions. That year the Public Health Service required prior institutional review for the extramural research it funded; DHEW extended review across the department in 1971. Belmont therefore consolidated and interpreted an evolving system rather than inventing ethical review.
1972–1974: exposure, hearings, rules, and legislation. Jean Heller's July 1972 Associated Press reporting brought national attention to the Public Health Service's decades-long syphilis study involving Black men in and around Tuskegee, Alabama. The project had deceived participants and withheld effective treatment. Congressional hearings in 1973 considered that study alongside broader abuses in human experimentation. DHEW formally issued 45 CFR part 46 on 30 May 1974. This sequence is reconstructed in Zachary Schrag's archival history. President Richard Nixon then signed the National Research Act, Public Law 93-348, on 12 July. The Act required institutional review boards for covered grant and contract applicants and created an eleven-member National Commission to identify principles and develop guidelines.
1974–1978: a commission, not a solitary author. The Commission included physicians, behavioral scientists, lawyers, ethicists, and Dorothy Height, president of the National Council of Negro Women. It produced specific work on research involving fetuses, prisoners, children, people then described in law with the now-obsolete phrase “the institutionalized mentally infirm,” and on IRBs. At a four-day retreat in February 1976, commissioners reduced several candidate duties to three principles. Staff philosopher Tom Beauchamp prepared successive drafts; commissioners, staff, and consultants reviewed and compressed them over the next two years. The Commission's DHEW booklet records its members, staff, consultants, and chairman Kenneth Ryan's transmission letter.
1978–1979: transmission and public notice. The Commission approved the wording in 1978 and transmitted the report to the DHEW secretary on 30 September. It asked DHEW to adopt the whole statement as departmental policy but proposed no specific administrative action in this report. On 18 April 1979 DHEW reproduced it in the Federal Register, 44 FR 23192–23197, as a notice of report for public comment. Calling Belmont simply a “1979 law” therefore misstates both its date and its legal status.
1981–1991: regulation and wider adoption. HHS and the Food and Drug Administration revised and aligned their existing human-participant rules in 1981; in 1991, fifteen federal departments and agencies adopted the common policy now called the Common Rule. The sequence matters: later regulation drew on the Commission's work, but statutes, departmental rules, and topic-specific commission recommendations—not Belmont alone—built the oversight system.