Council of Trent: Session XXIV, Reformation of Marriage, Chapter VII

CHAPTER VII. Vagrants are to be married with caution.

There are many persons who are vagrants, having no settled homes; and, being of a profligate character, they, after abandoning their first wife, marry another, and very often several in different places, during the life-time of the first. The holy Synod, being desirous to obviate this disorder, gives this fatherly admonition to all whom it may concern, not easily to admit this class of vagrants to marriage; and It also exhorts the civil magistrates to punish such persons severely. But It commands parish priests not to be present at the marriages of such persons, unless they have first made a careful inquiry, and, having reported the circumstance to the Ordinary, they shall have obtained permission from him for so doing.

Translation: J. Waterworth, The Canons and Decrees of the Council of Trent (1848), Hanover Historical Texts Project transcription (1995).