The formation of the Government of Western Australia is prescribed in its Constitution, which dates from 1890, although it has been amended many times since then. Western Australia is a state occupying the entire western third of the Australian continent. Year 1890 ( MDCCCXC) was a Common year starting on Wednesday (link will display the full calendar of the Gregorian calendar (or a Common Since 1901 Western Australia has been a state of the Commonwealth of Australia, and the Australian Constitution regulates its relationship with the Commonwealth. Year 1901 ( MCMI) was a Common year starting on Tuesday (link will display calendar of the Gregorian calendar (or a Common year starting For a topic outline on this subject see List of basic Australia topics. The Constitution of Australia is the law under which the Australian Commonwealth Government operates
Under the Australian Constitution, Western Australia ceded certain legislative and judicial powers to the Commonwealth, but retained complete independence in all other areas.
Western Australia is governed according to the principles of the Westminster system, a form of parliamentary government based on the model of the United Kingdom. The Westminster system is a democratic Parliamentary system of Government modelled after the British government (the Parliament of the United The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located Legislative power rests with the Parliament of Western Australia, which consists of the Crown, represented by the Governor of Western Australia, and the two Houses, the Western Australian Legislative Council and the Western Australian Legislative Assembly. The Parliament of Western Australia consists of the Western Australian Legislative Council, the Western Australian Legislative Assembly and the Governor The Governor of Western Australia is the representative in Western Australia of Australia 's Monarch Queen Elizabeth II. The Legislative Council, or upper house is one of the two chambers of parliament in the Australian state of Western Australia. The Legislative Assembly, or lower house is one of the two chambers of parliament in the Australian state of Western Australia.
Executive power rests formally with the Executive Council, which consists of the Governor and senior ministers. In practice executive power is exercised by the Premier of Western Australia and the Cabinet, who are appointed by the Governor, but who hold office by virtue of their ability to command the support of a majority of members of the Legislative Assembly. The Premier of Western Australia is the head of the executive government in the Australian State of Western Australia.
Judicial power is exercised by the Supreme Court of Western Australia and a system of subordinate courts, but the High Court of Australia has final jurisdiction. The Supreme Court of Western Australia is the highest state court in the Australian State of Western Australia. The High Court of Australia is the final court of appeal in Australia the highest court in the Australian court hierarchy. Other federal courts also have jurisdiction over certain matters, but only insofar as the Australian Constitution grants the federal government power to make laws for such matters.