Parliament of Australia
From 1901 to 1949, the House consisted of either 74 or 75 members (the Senate had 36). Between 1949 and 1984, it had between 121 and 127 members (the Senate had 60 until 1975, when it increased to 64). In 1977, the High Court ordered that the size of the House be reduced from 127 to 124 members to comply with the nexus provision. In 1984, both the Senate and the House were enlarged; since then the House has had between 148 and 150 members (the Senate has 76).
Parliament of Western Australia
Currently, the Legislative Council has 36 members elected for four-year terms from multi-member constituencies by proportional representation, and the Legislative Assembly has 59 members, elected for four-year terms from single-member constituencies, using preferential voting. As with all other Australian states and territories, enrolment to vote and voting for both Houses is compulsory for all resident Australian citizens—and eligible British citizens (i.e., those permanently resident and on the electoral roll prior to the passage of the Australia Act)—who are over the legal voting age of 18.