Commonwealth,state and Territory constitutions 

Each jurisdiction has its own constitution.

Commonwealth of Australia Constitution Act 1900

New South Wales: Constitution Act 1902

Queensland: Constitution of Queensland 2001

South Australia: Constitution Act 1934

Tasmania: Constitution Act 1934

Victoria: Constitution Act 1975

Western Australia: Constitution Act 1889

Australian Capital Territory (Self-Government) Act 1988 (Cth)

Northern Territory (Self- Government) Act 1978 (Cth)