Genuflecting before "greater prelates" (i.e. Bishops in their own dioceses, Metropolitans in their province, Papal Legates in the territory assigned to them, and Cardinals either outside of Rome or in the church assigned to them in Rome) is treated as obligatory in editions of the "Caeremoniale Episcoporum" earlier than that of 1985; during liturgical functions according to these prescriptions, clergy genuflect when passing before such prelates, but an officiating priest and any more junior prelates, canons, etc. substitute a bow of the head and shoulders for the genuflection.