The act ended the
1948 tripartite system of separate provision of hospital services under
regional hospital boards, hospital management committees and boards of governors; family practitioner services under executive councils; and community health services (including health visiting, maternity services, vaccination and ambulance services) under local authorities. These organisations were replaced by one unitary structure of 90 area health authorities (AHAs) answering to 14 regional health authorities (RHAs) and, ultimately, to the
Secretary of State for Social Services. AHAs were matched to local authority boundaries. Each AHA district centred on a district general hospital, with some AHAs multi-district and some single district. The act was introduced by a Conservative administration which had been in power since 1970. The Labour party returned to power in 1974 and implemented the planned reorganization of the health service. The incoming Labour government
of 1974 published a paper on
Democracy in the NHS in May that added local government representatives to the new RHAs and increased their proportion on each AHA to a third. ==Subsequent reorganisations==