2819. Matrimonial Impediments Produced through Misdeeds.—(a) Abduction.—There can be no valid marriage between a man who holds a woman under restraint in order to compel her to marry him, if she has been abducted by him or is violently detained by him in her residence or elsewhere. If the woman who has been carried away or who is held against her will marries unwillingly, the marriage is invalid according to natural law; if she marries willingly, the marriage is invalid from church law. Hence the impediment of abduction is of positive law only and does not oblige infidels (see Canon 1064).
(b) Crime.—There can be no valid marriage between the following: those who during a legitimate marriage have consummated adultery together and have mutually promised future marriage or have attempted marriage, even though only civilly (Canon 1075); those who during the same lawful marriage have consummated adultery together, and of whom one has committed conjugicide; those who have cooperated physically or morally, even though they are not adulterers, to murder the spouse of one of them. The purpose of this impediment is to safeguard the fidelity and rights of married persons, and to punish those who resort to adultery or murder in the hope of a new marriage. The impediment is ecclesiastical and does not affect infidels.
2820. Duties of the Pastor After the Inquiry about Impediments.—(a) Dispensation.—If the pastor finds an impediment of natural or divine law (e.g., the bond of an existing marriage), or an impediment which is never dispensed (e.g., consanguinity in the first degree of the collateral line, notorious conjugicide, when there is no danger of death), he cannot proceed with the marriage. If he discovers another impediment, he must inquire whether or not there is sufficient reason for dispensation. For the impediments of occult crime, disparity of cult outside of mission countries, age, Sacred Orders and religious profession (also for neglecting the form of marriage), a grave reason is necessary to permit marriage; but for the remaining impediments, a less grave reason is required. The usual or grave reasons for dispensation include the public good (e.g., peace between peoples, prevention of serious litigations), a great private good (e.g., a suitable marriage offered to a woman who on account of age or locality can hardly find another such chance), great spiritual good (e.g., prevention of a mixed or civil marriage or great scandal, termination of open concubinage), great temporal good (e.g., means to support the family of a poor widow); but other and lesser reasons sometimes suffice, as when the woman is illegitimate, an orphan, deflowered, sickly, or homely, or the man needs someone to take care of him or of his small children from a previous marriage, or when the marriage has already been announced or will be of great advantage to the parents of one of the parties. In case of urgent necessity or of danger of death, the pastor and also the confessor or priest who assists at the marriage are empowered to grant certain dispensations; in other cases dispensation can be granted only by the local Ordinary or by the Holy See. The petition for a dispensation must state the facts truthfully, but must conceal the identity of the petitioner when the impediment is occult. In executing a dispensation one must observe the conditions laid down by the superior who granted it (see commentaries on Canons 1043 sqq.).
(b) Publication.—Even though it is morally certain that there is no impediment, the banns of marriage should be proclaimed beforehand and in the place where the parties have their domicile or quasi-domicile (or residence, if they are _vagi_), and also, if necessary, in other places where they have lived. This is a grave duty, since its purpose is to ensure the validity and lawfulness of marriages. If it is morally certain that there is no impediment, the Ordinary may dispense for a good reason (see commentaries on Canons 1022 sqq.).
2821. After the Examination and Proclamation.—(a) If it is certain that there is an impediment, the procedure will be that given in 2820 a; (b) if it is doubtful whether there is a diriment impediment, the matter should be investigated more fully, but without defamation of the parties, and if the doubt remains, the question should be submitted to the Ordinary (see above, 2805 b); (c) if no impediment, certain or doubtful, has been discovered, the pastor should approve the parties for marriage.
2822. Duties of the Pastor as Regards the Religious Instruction of the Engaged Couple.—(a) The pastor should require those who are not confirmed to receive Confirmation before their marriage, if they can do this without serious inconvenience.
(b) He should instruct the parties in the essentials of Christian doctrine, if they are ignorant in these matters (see 920 sqq.), and he should point out to them the nature of marriage as a contract and as a Sacrament, its purposes and properties, the grace it confers and the conjugal and parental duties it imposes, the necessity of preparing for the Sacrament and of receiving it in the state of grace. He should also speak about the impediments, so that the couple may understand the disqualifications for a valid and lawful marriage; but this should be done prudently, so as not to shock the innocent or to help others to evade the law. But ignorance of the Catechism is not strictly an impediment; and if the parties are unwilling to take instruction, they should be married without it. In a mixed marriage it is often very useful to give the non-Catholic a short course in Catholic teaching, and all couples who are preparing for marriage would do well to read some of the good works prepared especially for the use of engaged or newly married people. The Code requires of pastors that in their sermons they instruct the people on marriage and exhort them to avoid mixed marriages and marriages with the unworthy (Canons 1018, 1064, 1065).
2823. The Pastor and the Duties of Engaged Couple.—The pastor should also inquire about duties owed by the couple to others.
(a) Duties to Parents.—He should seriously admonish minors subject to parental authority not to marry without the knowledge or against the reasonable wishes of their parents. If the parents are opposed to the marriage, the pastor should decide from the circumstances whether the opposition is justified or not; if one parent only is unwilling, the wishes of the father _per se_ have preference over those of the mother, as he is the head of the family. If the engaged couple will not heed the pastor, he is seriously bound to refuse to marry them until the case has been presented to the Ordinary for decision (Canon 1034).
(b) Duties to Civil Law.—The State has no power over the Sacrament of Matrimony, its bond, or its inseparable temporal effects (such as the rights and duties of spouses, legitimacy of children and the like), but it is competent in reference to merely civil effects and conditions, which are temporal circumstances separable from the substance of marriage. Hence, those who are getting married should comply with civil formalities that do not trespass on church rights, such as registration or marriage license.