Senator SCULLION (Northern Territory—Minister for Indigenous Affairs and Leader of The Nationals in the Senate) (17:31): by leave—I move: That senators be discharged from and appointed to committees as follows: Economics References Committee— Appointed— Substitute member: Senator Cameron to replace Senator McAllister for the committee's inquiry into insolvency in the Australian construction industry Participating member: Senator McAllister Foreign Affairs, Defence and Trade References Committee— Appointed— Substitute member: Senator Rhiannon to replace Senator Ludlam for the committee's inquiries into contamination caused by firefighting foams at RAAF Base Williamtown and Australian Defence Force facilities and at government sites Participating member: Senator Ludlam. Question agreed to.