The executive power of the commonwealth is vested in a governor-general (representing the British sovereign) and a cabinet, presided over by the prime minister, which represents the party or coalition holding a majority in the lower house of parliament. The parliament consists of two houses, the Senate, whose 76 members are elected to six- or three-year terms, depending on whether they represent a state or territory, and the House of Representatives, whose 150 members are elected to three-year terms. The distribution of federal and state powers is roughly like that in the United States. British intervention in Australian affairs was formally abolished in 1986. From its early years the federal government has been noted for its liberal legislation, such as woman suffrage (1902), old-age pensions (1909), and maternity allowances (1912). There are four main political parties: Liberal, Labor, National, and Democratic.