§1. For the office of vicar forane, which is not tied to the office of pastor of a certain parish, the bishop is to select a priest whom he has judged suitable, after he has considered the circumstances of place and time.
§2. A vicar forane is to be appointed for a certain period of time determined by particular law.
§3. The diocesan bishop can freely remove a vicar forane from office for a just cause in accord with his own prudent judgment.
Source: Code of Canon Law (Vatican.va)