(c) in respect to their firmness, some rights are alienable, that is, they are such as may be renounced or superseded lawfully, since they are not obligatory (e.g., the right to marry, the right to drink alcohol); while others are inalienable, that is, not subject to renunciation or deprivation, as being obligatory (e.g., the right to repel temptation, the right to serve God).
1694. Signs by which Strict and Non-Strict Rights May Be Distinguished.—(a) That to which one has a strict right belongs to one as one’s own, and hence it must be determinate or determinable. The right of a beggar to receive some assistance from someone is not a strict right, since it cannot be urged against any particular thing or any individual person; but the right of a creditor is a strict right, since it can be urged against the debtor for a definite amount.
(b) That to which one has a strict right is owed in justice, and hence it may be enforced by legal means, or in case of need by physical force. The right of a child not to be slighted in the distribution of presents made by its parents, the right of a person who has had a falling out with another that the latter shall accept advances for a reconciliation, and the right of a benefactor that the beneficiaries show signs of gratitude, are not strict rights, because they cannot be enforced in courts of justice, but the right of a laborer against his employer is a strict right, since it can be vindicated by legal means. It should be noted that a strict right is one that is granted as a proper, exclusive and enforceable power by any law, whether natural or positive, and hence the fact that human law will not vindicate a right (e.g., the right arising from a contract naturally good, but legally not defensible, the right of a parent to his child’s respect) does not prove that the right is not strict.
1695. A strict right to have or to own is either _in re_ or _ad rem_. (a) A right _in re_ (real or complete right) is the right to that which one already lawfully has as one’s own (e.g., the right that Caius has to the wages paid him by Balbus). (b) A right _ad rem_ (personal or inchoate right) is the right to that which one is entitled to obtain as one’s own (e.g., the right that Caius has to receive the wages promised him by Balbus).
1696. Legal Enforcement of Strict Rights.—(a) The right _in re_ authorizes recourse to a real action (_actio in rem_), that is, to a suit against the thing itself, no matter where it be or by whom it be held, as when one sues to recover one’s property through the ejectment of a wrongful possessor; for the thing is immediately and juridically bound to him who has the right, as being his own.
(b) The right _ad rem_ enables one to enforce one’s claim by a personal action (_actio in personam_), that is, to bring a suit against a definite person on whom one has a claim by reason of contract, domestic relationship, fiduciary position, etc., as when one sues for recovery on account of the non-fulfillment of the conditions of a compact.
1697. The right _in re_ to property is either perfect or imperfect.
(a) A perfect right (right of full dominion) is that which enables one to exercise all the prerogatives of ownership, that is, to dispose at will of an object (e.g., to sell, lend, give away, etc.), to use it (e.g., to occupy a house, to make alterations in it, to tear it down, etc.), and to exclude others (e.g., to put a fence about one’s property to exclude the public).
(b) An imperfect right (right of partial dominion) is had when one is restricted as to the right of the disposition of one’s goods, for example, when one is forbidden to sell; or when one has the right of disposition without the right of use, for example, when one is forbidden on account of the vows of religion to use property one owns (radical dominion); or when one has the right of use without the right of disposition, for example, when one is forbidden to make permanent alterations in a house one occupies as tenant (indirect or useful dominion); or when one has the other rights of ownership but lacks the right of exclusion, for example, when one may not exclude a neighbor’s flock from grazing in one’s pasture (ownership subject to servitude).
1698. The Subject of Justice, or the Faculty of the Soul in Which It Exists.—(a) Justice is not in the intellect, for we are not called just because we know a thing rightly, but because we act rightly; (b) nor is it in the sensitive appetite, since a sense faculty does not apprehend the relations between rights and duties; (c) hence, justice is in the rational appetite or will.