 The changes in the presiding board from the 3rd assembly were the replacement of Mohammad Yazdi with Ebrahim Amini, who retired, as the 2nd deputy chairman; and election of Hassan Rohani as a provisionist.After the disputed results of the June 2009 Iranian presidential election were certified by Supreme Leader Ali Khamenei, Chairman Rafsanjani was reported to have called a meeting of the Assembly of Experts, as the Assembly has the constitutional power to hire and fire the Supreme Leader.On 8 March 2011, Ayatollah Mohammad-Reza Mahdavi Kani replaced Ayatollah Rafsanjani as chairman.