The priesthood office of Seventy, which alludes to the New Testament account of Jesus' commission of seventy missionaries, is also considered to be an Elder. Part of the function of the Seventy is a missionary role, and they work closely with the Apostle in charge of the field they are in to develop the strategies and resources to implement the missionary task of the church. They are organized into ten (formerly seven, see below) quorums, each quorum is presided over by a president. These presidents make up the Council of Presidents of Seventy and are collectively led by the "Senior President of Seventy," who is one of the principal missionaries and missionary education leaders of the church. The scriptures suggest that the Seventy are in some way equal to the Council of Twelve Apostles, as indicated in Doctrine and Covenants 104:11e. Even more intriguing, the Council of Twelve is sometimes said to be equal of the Presidency. The equality of the seventy to the Twelve, and by virtue of such equality, also the Presidency, is confirmed in 124:4a. The logistics of such equality to the Presidency and the Twelve (as well as the Twelve to the Presidency) is not made plain.