Bishops, Priests, and Deacons in Apostolic Succession under the Lordship of Jesus Christ with an Archbishop as a Chief Pastor shall serve the CCIA. Other offices of ministry are recognized, as described in these Canons, and the priesthood of all believers is to be exercised in the whole Church. Church Structure: The CCIA is governed by the College of Bishops, presided over by the Archbishop. A Diocese is presided over by a Diocesan Bishop. Each Diocese is composed of Parishes and/or Missions. Mission Districts and Deaneries may also be formed within or without a Diocese. Parishes and Missions, which may include Minor Orders and Lay Ministries, such as Catechists, Lectors, Lay Preachers, Lay Eucharistic Ministers and Pastoral Leaders, are presided over by a Priest, a Deacon or a Bishop. Mission Districts are presided over by an Auxiliary or Coadjutor Bishop, and Deaneries are presided over by a Dean.