Priesthood holders attend opening exercises together before separating for their quorum or group meetings. A member of the bishopric always conducts opening exercises. An opening hymn and prayer are required. Occasionally the bishopric may use this time to transact business that affects all priesthood holders, to present instructions, and to worship the Lord.
The elders quorum president and high priests group leader should sit with the bishopric during opening exercises.- Melchizedek Priesthood
Leadership Handbook, p. 21