(c) It is given by a competent superior. Even here precept differs from law, since laws can be made only by one who has jurisdictional or public authority (see above, 285), while precepts may be given also by those who have only dominative or private authority (as parents, heads of families, husbands, employers, abbesses). In canonical matters precepts may be given by religious superiors, parish priests, rectors of seminaries, and for the court of conscience by the confessor.
516. Precept is similar to law: (a) as to its object, which must be just, good, and possible of observance; (b) as to its binding force, since it can be imposed even on those who are unwilling.
517. Precepts are personal (i.e., they affect the person to whom they are given wherever he may be), unless they are given as territorial (Canon 24). Hence: (a) a precept given by one who has no territorial authority (e.g., a religious superior) is personal; (b) a precept given by the Pope, whose authority includes every territory, is also personal; (c) a precept given by the bishop is personal, if given to an individual; it is personal or territorial if given to a community, according to the nature of the case or the wording of the precept. Example: The precept not to go to theatres during a journey, imposed by a bishop under pain of suspension, obliges everywhere, both as to fault and as to penalty.
518. As to the force of precepts: (a) morally or as to fault, they oblige, so that the violator is guilty of disobedience and of sin against any particular virtue the superior willed to impose under precept; (b) juridically or as to the penalty prescribed, they do not oblige, unless the precept was given legally—i.e., by a written document, or in the presence of two witnesses, etc. (Canon 24). Example: If a precept was given under the penalty of loss of office, but without the legal formalities, the canonical process and sentence of deprivation could not be resorted to.
519. A precept expires of itself with the expiration of the authority that gave it (e.g., at the death or cessation of office of the superior), unless the precept was given by document or before witnesses (Canon 24).
520. A rescript is a written reply made by the Holy See or the Ordinary to a request, statement, or consultation. Replies of this kind are employed in reference to the concession of benefices and to dispositions to be made concerning litigation and judicial procedure. Usually they grant favors, either transitory—e.g., a dispensation—or permanent—e.g., a privilege (Canons 36-62).
521. A privilege is a special and permanent right granted by a ruler to an individual or community to act contrary to or beyond the law.
(a) It is a permanent right, and so resembles law, which is also stable and forbids interference with what it grants.
(b) It is a special right, and so it differs from law, which is general and imposes obligation. It is sometimes styled “private law.” Moreover, law requires promulgation, privilege requires only acceptance.
(c) It is granted by the ruler (i.e., by the Pope, bishop, or other legislator), and thus it differs from permission granted by a simple superior.