The following are not subject to prescription: 1/ rights and obligations which are of the divine natural or positive law; 2/ rights which can be obtained from apostolic privilege alone; 3/ rights and obligations which directly regard the spiritual life of the Christian faithful; 4/ the certain and undoubted boundaries of ecclesiastical territories; 5/ Mass offerings and obligations; 6/ provision of an ecclesiastical office which, according to the norm of law, requires the exercise of a sacred order; 7/ the right of visitation and the obligation of obedience, in such a way that the Christian faithful cannot be visited by any ecclesiastical authority or are no longer subject to any authority.
Source: Code of Canon Law (Vatican.va)