The federal nature of the Commonwealth and the structure of the Parliament of Australia were the subject of long negotiations among the colonies. The House of Representatives is elected on a basis which shows the different sized populations of the States. So New South Wales has 50 members while Tasmania has only five. But the Senate is elected on a basis of equality among the States: all States have 12 Senators, regardless of population. This was so the Senators of the smaller States could form a majority and change or even reject laws from the House of Representatives. The ACT and the NT elect two senators each.