 He may be assisted by other diocesan priests and deacons, and serves under the local diocesan bishop, who is in charge of the many parishes in the territory of the diocese or archdiocese.In some cases due to the shortage of priests and the expense of a full-time priest for depopulated parishes, a team of priests "in solidum" may share the management of several parishes.According to Catholic doctrine, a priest or bishop is necessary in order to perform the ceremony of the Eucharist, take confession, and perform Anointing of the Sick.