§1. No privilege ceases through renunciation unless the competent authority has accepted the renunciation.
§2. Any physical person can renounce a privilege granted only in that person’s favor.
§3. Individual persons cannot renounce a privilege granted to some juridic person or granted in consideration of the dignity of a place or of a thing, nor is a juridic person free to renounce a privilege granted to it if the renunciation brings disadvantage to the Church or to others.
Source: Code of Canon Law (Vatican.va)