§1. With the consent of the council, the supreme moderator for a grave cause can grant an indult of exclaustration to a member professed by perpetual vows, but not for more than five years, and if it concerns a cleric, with the prior consent of the ordinary of the place in which he must reside. To extend an indult or to grant it for more than five years is reserved to the Holy See, or to the diocesan bishop if it concerns institutes of diocesan right.
§2. It is only for the Apostolic See to grant an indult of exclaustration for nuns.
§3. At the petition of the supreme moderator with the consent of the council, exclaustration can be imposed by the Holy See on a member of an institute of pontifical right, or by a diocesan bishop on a member of an institute of diocesan right, for grave causes, with equity and charity observed.
Source: Code of Canon Law (Vatican.va)