Western Australian Green Scott Ludlam and Queensland Green Larissa Waters are now the third and fourth senators to have left the Senate since the last election due to ineligibility. Prior to the current term of Parliament, only five parliamentarians had ever lost their seats due to Constitutional eligibility reasons.

The four senators—Rodney Culleton, Bob Day, Scott Ludlam and Larissa Waters—all left Parliament due to different aspects of section 44 of the Australian Constitution. Section 44 lists several separate conditions of disqualification that apply to members of both Houses of Parliament.