Government of Australia
The Commonwealth of Australia was formed in 1901 as a result of an agreement among six self-governing British colonies, which became the six states. The terms of this contract are embodied in the Australian Constitution, which was drawn up at a Constitutional Convention and ratified by the people of the colonies at referendums. The Australian head of state is the Queen of Australia who is represented by the Governor-General of Australia, with executive powers delegated by constitutional convention to the Australian head of government, the Prime Minister of Australia.
Constitution of Australia
Before the Bill was passed, however, one final change was made by the imperial government, upon lobbying by the Chief Justices of the colonies, so that the right to appeal from the High Court to the Privy Council on constitutional matters concerning the limits of the powers of the Commonwealth or States could not be curtailed by parliament. Finally, the Commonwealth of Australia Constitution Act was passed by the British Parliament in 1900. Western Australia finally agreed to join the Commonwealth in time for it to be an original member of the Commonwealth of Australia, which was officially established on 1 January 1901.