See also Keys of the Priesthood; President; Revelation
The President of the Church and his Counselors. They are a quorum of three high priests and preside over the whole Church. The First Presidency holds all the keys of the priesthood.
The keys of the kingdom always belong to the Presidency of the High Priesthood, D&C 81:2.
The Presidency of the High Priesthood has the right to officiate in all offices, D&C 107:9, 22.
Whosoever receiveth me receiveth the First Presidency, D&C 112:20, 30.
The First Presidency is to receive oracles [revelations] for the whole Church, D&C 124:126.