Australian Broadcasting Authority
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The Australian Broadcasting Authority took over the functions of the Australian Broadcasting Tribunal and the National Transmission Authority.
The Australian Broadcasting Tribunal took over the functions of the Australian Broadcasting Control Board in the 1970s. The engineering function in some cases was handled by the National Transmission Authority when the Post Office ceased being responsible for telecommunications.
On 1 July 2005, the Australian Communications and Media Authority (ACMA) brought together the Australian Broadcasting Authority (ABA) and the Australian Communications Authority (ACA) .