A term applied to the obligation of a pastor to live within his parish. Its purpose is to guarantee the service and fulfillment of one's pastoral duties. The bishop is also obliged to personal residence in his diocese, even though he has a coadjutor bishop. If a pastor lives outside of his parish, or a bishop outside of his episcopal city, he does so only by dispensation. Two months vacation are allowed a pastor each year; bishops, two or at most three months. To be absent from his parish for more than a week, a pastor, besides a good reason, must have the written permission of his bishop. A substitute, approved by the ordinary, must be provided during the pastor's absence. If this substitute is a religious, the approval of the bishop and his religious superior is required.