§1. A pastor is obliged to reside in a rectory near the church. Nevertheless, in particular cases and if there is a just cause, the local ordinary can permit him to reside elsewhere, especially in a house shared by several presbyters, provided that the performance of parochial functions is properly and suitably provided for.
§2. Unless there is a grave reason to the contrary, a pastor is permitted to be absent from the parish each year for vacation for at most one continuous or interrupted month; those days which the pastor spends once a year in spiritual retreat are not computed in the time of vacation. In order to be absent from the parish for more than a week, however, a pastor is bound to inform the local ordinary.
§3. It is for the diocesan bishop to establish norms which see to it that during the absence of the pastor, a priest endowed with the necessary faculties provides for the care of the parish.
Source: Code of Canon Law (Vatican.va)