broadcast news and other program material with much greater efficiency than in the previous two decades. By this time, as many as 13 national news bulletins were broadcast daily. In 1948, the ABC began operating experimental FM stations on 92.1 MHz in many capital cities. These had ceased by 1958. 1960s–1980s The Papua New Guinea part of the ABC radio network became the National Broadcasting Commission of PNG in 1973, as part of preparations for PNG independence. In 1975, the ABC introduced a 24-hour-a-day AM rock station in Sydney, 2JJ (Double Jay), which was eventually expanded into the national Triple J FM network. Also in 1975, 3ZZ Access Radio began in Melbourne. It gave access to airtime to people from many language groups that had previously rarely been heard on air. It was closed in 1977, with its assets absorbed by 3EA (later to be part of SBS). A classical music network was established in 1976 on the FM band, broadcasting from Adelaide. It was initially known as ABC-FM - referring both to its 'fine music' programming and type of radio modulation. The Australian Broadcasting Corporation Act 1983 changed the name of the organisation from the Australian Broadcasting Commission to the Australian Broadcasting Corporation effective 1 July 1983. At the same time, television and radio operations were split into two separate divisions, with an overhaul of management, finance, property and engineering undertaken. In 1981 ABC Radio began carrying Aboriginal and Torres Strait Islander broadcasts in Alice Springs and later North Queensland, while at the same time comedy and social history units were set up, and news and current affairs output expanded. A new Concert Music department was formed in 1985 to coordinate the corporation's six symphony orchestras, which in turn received a greater level of autonomy in order to better respond to local needs. Open-air free concerts and tours, educational activities, and joint ventures with other music groups were undertaken at the time to expand the Orchestras' audience reach. ABC Radio was restructured significantly in 1985 - ABC Radio 1 became the ABC Metropolitan Radio network, while Radio 2 became known as Radio National (callsigns, however, were not standardised until 1990). New programs such as The World Today, Australia All Over and the Coodabeen Champions were introduced, while ABC-FM established an Australian Music Unit in 1989. Radio Australia began to focus on the Asia-Pacific region, with coverage targeted at the