As well as the election for the full House of Representatives, there will be an election on May 3 for 40 of the 76 senators. The 72 state senators have six-year terms, with half of them up for election every three years. The four territory senators are all up for election with each House election.
In a double dissolution election, all senators are up for election, but this election won’t be a double dissolution. State senators elected at this election will begin their six-year term on July 1.
The six states are entitled to equal representation in the Senate, so each state has 12 senators. This system greatly overrepresents Tasmania relative to its population. The ACT and Northern Territory have two senators each.