Representation Act 1983

Representation Act 1983

This Act sets the number of senators each Australian state is entitled to have in the Senate (the upper house of Federal Parliament).

What it does:

• Sets 12 senators per state as the permanent rule. With 6 states, this means 72 state senators in total (plus additional senators for territories).
• Repeals two older Acts (from 1948 and 1949) that previously governed Senate numbers.
• Managed the transition from the previous arrangement of 10 senators per state to the new 12, including specific rules about when the extra senators would start sitting, how long their terms would be, and when they would be paid.

Who does this affect?

• Every Australian voter, because it determines how many people represent your state in the Senate.
• Political parties, because a larger Senate changes how preferences flow and how many seats each party can win.
• The Senate itself, which grew from 60 state senators to 72 state senators as a result.

Why does it matter? The Senate is designed to represent states equally, regardless of population. By increasing each state's representation from 10 to 12 senators, this Act made the Senate larger and — in theory — more representative and harder for any single party to control outright. The transitional rules (sections 5 and 6) were needed to carefully phase in the new senators without disrupting the existing 6-year rotational terms that senators serve.