When marrying a non Catholic the marriage must be performed in a Catholic Church. Any marriage performed by a non Catholic Clergy is not recognized by the Church as a valid marriage.
a Catholic must seek permission from the local bishop to marry a non-Catholic. If the person is a non-Catholic Christian, this permission is called a "permission to enter into a mixed marriage",
The permission is called a "dispensation from disparity of cult" and is a condition for the validity of the marriage.
NO DIVORCE - In his preaching Jesus unequivocally taught the original meaning of the union of man and woman as the Creator willed it from the beginning permission given by Moses to divorce one's wife was a concession to the hardness of hearts. The matrimonial union of man and woman is indissoluble: God himself has determined it 'what therefore God has joined together, let no man put asunder'.
When marrying a non Catholic the Catholic Church requires that the children be baptized in a Catholic Church and brought up in the Catholic religion.