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. Canon 1086 (C.I.C 1983) reads: "A marriage between two persons, one of whom was baptized in the Catholic Church or received into it, and the other of whom is not baptized, is invalid." Disparity of cult 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.