The Australian Government (澳大利亞政府), also known as the Commonwealth Government or federal government, is the national executive government of the Commonwealth of Australia, a federal parliamentary constitutional monarchy established in 1901. Constitutionally designated as the “Government of the Commonwealth,” the federal government operates under a Westminster-style system with executive power exercised by the Governor-General as representative of the British monarch, while the Prime Minister serves as head of government. The bicameral Parliament consists of the Senate and House of Representatives, with the government formed by the party holding majority support in the lower house. Under Section 51 of the Australian Constitution, federal powers include external affairs, defense, immigration, trade, and taxation, with Tourism Australia operating as one of its corporate portfolio agencies under the Department of Foreign Affairs and Trade.