Bishops exercise their pastoral office and ministry for that portion of the People of God which has been entrusted to them. The Bishops of the Latin Church are appointed by the Pope. In the case of Bishops of the Eastern Catholic Churches sui juris, their responsibilities are entrusted to them by their own Patriarch or Permanent Synod with the assent of the Pope as head of the Universal Church. (A Church sui juris is recognized as having its own law, disciplinary practices and liturgical tradition). Bishops are assisted in their mission of teaching, sanctifying, and governing by priests and deacons. The traditional term for a Bishop in the Eastern Churches is Eparch and, in the case when he is responsible for an Exarchate, Exarch.