Disparity of cult

Disparity of cult, sometimes called disparity of worship (Disparitas Cultus), is a diriment impediment in Roman Catholic canon law: a reason why a marriage cannot be validly contracted without a dispensation, stemming from one person being certainly baptized, and the other certainly not baptized.

Disparity of worship does not affect the marriage of a Catholic or baptized non-Catholic with one whose baptism, even after careful investigation concerning the baptismal ceremony or its validity, remains doubtful. Neither does it in any way influence the marriage of two who, after diligent examination, are still considered doubtfully baptized.

A marriage between a Catholic and a baptized non-Catholic is a mixed marriage. Though sometimes referred to by this term, the permission of the bishop is required merely to make the union licit; the marriage is valid but illicit without it.

Disparity of worship can be dispensed for grave reasons, and on the promises (usually written) from the spouses: the unbaptized not to interfere with the spouse's practice of religion or the raising of the children in religion, the Catholic to practice the Catholic religion and raise the children in it.

References

 This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "Disparity of Worship". Catholic Encyclopedia. New York: Robert Appleton Company.