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).
Balance of power (parliament)
The Senate, which serves as the nation's upper house and as a house of review, was established on the basis of ensuring that the smaller Colonies joining the Commonwealth were given equal representation, as required under the Commonwealth of Australia Constitution Act 1900. Between 1901 and 1918, Senators were elected on a first past the post system, changing to each state voting as one electorate on a preferential system from 1918 until 1948. During this period, the majority party in the lower house also generally had a commanding majority in the Senate. Since 1949, Senators are elected on the basis of achieving a transferable quota in each State or Territory. In more recent years, this method of election has generally resulted in a multi-party mix. In the early years after the establishment of the Commonwealth, Senators were more inclined to vote along State lines, with some exceptions.