The Order of Australia was established on 14 February 1975 by letters patent of Queen Elizabeth II of Australia, the Australian monarch, and countersigned by the Prime Minister of Australia, Gough Whitlam. The original order had three levels: Companion (AC), Officer (AO) and Member (AM) as well as two divisions: Civil Division and Military Division. At the time it was also announced that Australian prime ministers would no longer nominate persons for British Imperial honours, but this new practice did not extend to nominations by state premiers.