Angl s 3. In common error or in positive probable doubt wether of fact or law , the Church supplies jurisdiction both for the external and the internal forum.
Marriage enjoys the favor of law.
Wherefore, in case of doubt, the marriage is to be considered valid until the contrary is proved. In common error about fact or about law, and also in positive ad probable doubt about law or about fact , the Church supplies executive power of governance both for the external and for the internal forum. This same norm applies to the faculties mentioned in cann. Marriage enjoys the favour of law. Consequently, in doubt the validity of a marriage must be upheld until the contrary is proven.