§1. The diocesan bishop freely appoints the rector of a church, without prejudice to the right of election or presentation if someone legitimately has it; in that case, it is for the diocesan bishop to confirm or install the rector.
§2. Even if a church belongs to some clerical religious institute of pontifical right, the diocesan bishop is competent to install the rector presented by the superior.
§3. The rector of a church which is connected with a seminary or other college which is governed by clerics is the rector of the seminary or college unless the diocesan bishop has determined otherwise.
Source: Code of Canon Law (Vatican.va)