Succession in the Church relies upon seniority. the guy who has been the apostle the longest (frequently) succeeds the president of the church whilst he passes away. i'm no longer attentive to any exception to this custom subsequently some distance. in this manner the descision is left as much as the Lord, by using fact He makes a decision who passes away whilst. so some distance as counselors bypass, they are apostles themselves yet like President Eyring they are no longer unavoidably next in line. President Hinckley has been in the 1st presidency for 26 years (14 years beforehand being the president). the subsequent senior apostle is President Monson, then Packer, Perry, Nelson, o.ok., Ballard, Wirthlin, Scott, Hales, Holland, Eyring, Uchtdorf, Bednar, and then cook dinner. If President Packer is termed to serve in the 1st presidency then the hot "performing" president of the quorum of the 12 apostles would be Elder Perry, returned by using fact of seniority. here hyperlink is from the church's information website and info succession in the Church of Jesus Christ.