Deputy Prime Minister of Australia accepted the view put to him by McEwen that to commission a Liberal temporarily as Prime Minister would give that person an unfair advantage in the forthcoming party room ballot for the permanent leader. McEwen's appointment was in keeping with the previous occasion when the main non-Labor party was without a leader; Earle Page of the Country Party was interim Prime Minister between 7 and 26 April 1939—the period between Joseph Lyons' sudden death and the United Australia Party naming Robert Menzies his successor. Since 1968 only two Deputy Prime Ministers have gone on to become Prime Minister: Paul Keating
Prime Ministerial Task Group on Emissions Trading April 2007, the federal Labor Opposition and the Labor-controlled state and territory governments commissioned the separate Garnaut Climate Change Review. The Task Group members included: Prime Ministerial Task Group on Emissions Trading Prime Ministerial Task Group on Emissions Trading was a Task Group set up on 10 December 2006 by Australian Prime Minister John Howard to develop an Australian Carbon Trading Scheme. The terms of reference of the task group was: The Prime Ministerial Task Group submitted its final report on 31 May 2007. The scheme proposed by the Task Group had some similarities to the "hybrid scheme" developed by