The Senate of Canada ( ) is a component of the Parliament of Canada, along with the monarch (represented by the governor general) and the House of Commons. The Senate consists of 105 members appointed by the governor general on the advice of the prime minister. Seats are assigned on a regional basis, with each of the four major regions receiving 24 seats, and the remainder of the available seats being assigned to smaller regions. The four major regions are: Ontario, Quebec, the Maritime provinces, and the Western provinces. The seats for Newfoundland and Labrador, the Northwest Territories, Yukon, and Nunavut are assigned apart from these regional divisions. Senators may serve until they reach the age of 75.
The Senate is the upper house of Parliament, and the House of Commons is the lower house. This does not, however, imply that the Senate is more powerful than the House of Commons, merely that its members and officers outrank the members and officers of the House of Commons in the order of precedence for the purposes of protocol. Indeed, as a matter of practice and custom, the Commons is by far the dominant chamber. Although the approval of both houses is necessary for legislation, the Senate rarely rejects bills passed by the directly elected Commons. Moreover, the government is responsible solely to the House of Commons; the Prime Minister of Canada and Cabinet stay in office only while they retain the confidence of the Commons. The Senate does not exercise any such control. Although legislation can normally be introduced in either house, the majority of government bills originate in the House of Commons. Under the Constitution, money bills must always originate in the House of Commons.