Australia is a federal parliamentary constitutional monarchy.[205] The country has maintained a stable liberal democratic political system under its constitution, which is one of the world's oldest, since Federation in 1901. It is also one of the world's oldest federations, in which power is divided between the federal and state and territorial governments. The Australian system of government combines elements derived from the political systems of the United Kingdom (a fused executive, constitutional monarchy and strong party discipline) and the United States (federalism, a written constitution and strong bicameralism with an elected upper house), along with distinctive indigenous features.[206][207]
The federal government is separated into three branches:[208]
Elizabeth II reigns as Queen of Australia and is represented in Australia by the governor-general at the federal level and by the governors at the state level, who by convention act on the advice of her ministers.[210][211] Thus, in practice the governor-general acts as a legal figurehead for the actions of the prime minister and the Federal Executive Council. The governor-general does have extraordinary reserve powers which may be exercised outside the prime minister's request in rare and limited circumstances, the most notable exercise of which was the dismissal of the Whitlam Government in the constitutional crisis of 1975.[212]