I told Richard an old friend that IF one person was of the Catholic faith and one Protestant faith and they wer married by an "Official" ie Justice of the Peace etc. That the marriage would have to be SOLEMINIZED by a priest in usually the brides church, but could also be the grooms and this solemization of vows would be entered into the records of the church which again the parish being in the home town of the Catholic individual ...The ceremony took effect "OTSIDE THE RAIL" only 2 Catholics could be married inside the altar rail.....IF one who was Protestant changed faith they both would be inside the rail I believe BUT most important is that the Catholic parish churches keep excellent records and also I think sent to a regional office....... I hope I explained this correctly ....Gil Bagley