§1. It is equally reserved to the supreme moderator with the consent of the council to grant permission for a definitively incorporated member to transfer to another society of apostolic life; the rights and obligations proper to the society are suspended in the meantime, without prejudice to the right of returning before definitive incorporation in the new society.
§2. Transfer to an institute of consecrated life or from one to a society of apostolic life requires the permission of the Holy See, whose mandates must be observed.
Source: Code of Canon Law (Vatican.va)