The governor general holds the power to appoint senators, although, in modern practice, he or she makes appointments only on the advice of the prime minister. Senators originally held their seats for life; however, under the British North America Act, 1965 (now known as the Constitution Act, 1965), members, save for those appointed prior to the change, may not sit in the Senate after reaching the age of 75. Prime ministers normally choose members of their own parties to be senators, though they sometimes nominate independents or members of opposing parties. In practice, a large number of the members of the Senate are ex-Cabinet ministers, ex-provincial premiers, and other eminent people.
