Decree Concerning the Reform of Matrimony, Chapter I
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Although it is not to be doubted that clandestine marriages made with the free consent of the contracting parties are valid and true marriages so long as the Church has not declared them invalid, and consequently that those persons are justly to be condemned, as the holy council does condemn them with anathema, who deny that they are true and valid, and those also who falsely assert that marriages contracted by children [minors] without the consent of the parents are invalid, nevertheless the holy Church of God has for very just reasons at all times detested and forbidden them. But while the holy council recognizes that by reason of man‘s disobedience those prohibitions are no longer of any avail, and considers the grave sins which arise from clandestine marriages, especially the sins of those who continue in the state of damnation, when having left the first wife with whom they contracted secretly, they publicly marry another and live with her in continual adultery, and since the Church which does not judge what is hidden, cannot correct this evil unless a more efficacious remedy is applied, therefore, following in the footsteps of the holy Lateran Council celebrated under Innocent III, it commands that in the future, before a marriage is contracted, the proper pastor of the contracting parties shall publicly announce three times in the church, during the celebration of the mass on three successive festival days, between whom marriage is to be contracted; after which publications, if no legitimate impediment is revealed, the marriage may be proceeded with in the presence of the people, where the parish priest, after having questioned the man and the woman and heard their mutual consent, shall either say: “I join you together in matrimony, in the name of the Father, and of the Son, and of the Holy Ghost,“ or he may use other words, according to the accepted rite of each province. But if at some time there should be a probable suspicion that a marriage might be maliciously hindered if so many publications precede it, then either one publication only may be made or the marriage may be celebrated forthwith in the presence of the parish priest and of two or three witnesses.
Then before its consummation the publications shall be made in the church, so that if any impediments exist they may be the more easily discovered, unless the ordinary shall deem it advisable to dispense with the publications, which the holy council leaves to his prudence and judgment. Those who shall attempt to contract marriage otherwise than in the presence of the parish priest or of another priest authorized by the parish priest or by the ordinary and in the presence of two or three witnesses, the holy council renders absolutely incapable of thus contracting marriage and declares such contracts invalid and null, as by the present decree it invalidates and annuls them. Moreover, it commands that the parish priest or another priest who shall have been present at a contract of this kind with less than the prescribed number of witnesses, also the witnesses who shall have been present without the parish priest or another priest, and also the contracting parties themselves, shall at the discretion of the ordinary be severely punished. Furthermore, the same holy council exhorts the betrothed parties not to live together in the same house until they have received the sacerdotal blessing in the church; and it decrees that the blessing is to be given by their own parish priest, and permission to impart it cannot be granted to any other priest except by the parish priest himself or by the ordinary, any custom, even though immemorial, which ought rather to be called a corruption, or any privilege notwithstanding. But if any parish priest or any other priest, whether regular or secular, should attempt to unite in marriage or bless the betrothed of another parish without the permission of their parish priest, he shall, even though he may plead that his action was based on a privilege or immemorial custom, remain ipso jure suspended until absolved by the ordinary of that parish priest who ought to have been present at the marriage or from whom the blessing ought to have been received. The parish priest shall have a book in which he shall record the names of the persons united in marriage and of the witnesses, and also the day on which and the place where the marriage was contracted, and this book he shall carefully preserve. Finally, the holy council exhorts the betrothed that before they contract marriage, or at least three days before its consummation, they carefully confess their sins and approach devoutly the most holy sacrament of the Eucharist. If provinces have in this matter other laudable customs and ceremonies in addition to the aforesaid, the holy council wishes earnestly that they be by all means retained. And that these so salutary regulations may not remain unknown to anyone, it commands all ordinaries that they as soon as possible see to it that this decree be published and explain to the people in all the parish churches of their dioceses, and that this be done very often during the first year and after that as often as they shall deem it advisable. It decrees, moreover, that this decree shall begin to take effect in every parish at the expiration of thirty days, to be reckoned from the day of its first publication in that church.
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Source of the English translation: Canons and Decrees of the Council of Trent, original text with English translation by Rev. H.J. Schroeder, O.P. St. Louis and London: Herder Book Company, 1950, pp. 29-35, 40-42, 46-48, 72-75, 101-04, 132-34, 175-76, 180-85.
The source of the German text for parts A-F is as follows: Dekrete der ökumenischen Konzilien, vol. 3: Konzilien der Neuzeit, edited by Josef Wohlmuth. Paderborn: Ferdinand Schöningh, 2002, pp. 671-74, 676-78, 681-82, 693-95, 711-13, 726-27, 750-51; part G is from Heinrich Denzinger, Enchiridion symbolorum definitionum et declarationum de rebus fidei et morum. Kompendium der Glaubensbekenntnisse und kirchlichen Lehrentscheidungen. Verlag Herder GmbH, Freiburg i. Br., 43. Edition 2010, pp. 572-77.