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

CHAPTER II. Between whom Spiritual Relationship is contracted.

Experience teaches, that, by reason of the multitude of prohibitions, marriages are ofttimes unwittingly contracted in prohibited cases, in which marriages either the parties continue to live on, not without great sin, or they are dissolved, not without great scandal. Wherefore, the holy Synod, wishing to provide against this inconvenience, and beginning with the impediment arising from spiritual relationship, ordains, that, in accordance with the appointments of the sacred canons, one person only, whether male or female, or at most one male and one female, shall receive in baptism the individual baptized; between whom and the baptized, and the father and mother thereof; as also between the person baptizing and the baptized, and the father and mother of the baptized; and these only; shall spiritual relationship be contracted.

The parish priest, before he proceeds to confer baptism, shall carefully inquire of those whom it may concern, what person or persons they have chosen to receive from the sacred font the individual baptized, and he shall allow him or them only to receive the baptized; shall register their names in the book, and teach them what relationship they have contracted, that they may not have any excuse on the score of ignorance. And if any others, besides those designated, should touch the baptized, they shall not in any way contract a spiritual relationship; any constitutions that tend to the contrary notwithstanding. If through the fault or negligence of the parish priest any thing be done contrary hereto, he shall be punished, at the discretion of the Ordinary. That relationship, in like manner, which is contracted by confirmation shall not pass beyond him who confirms the person confirmed, his father and mother, and him who places his hand on him; all impediments arising from this kind of spiritual relationship between other persons being utterly set aside.

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