Prohibitions.—In direct line marriage is forbidden between all legitimate or illegitimate ascendants and descendants and their spouses.
In the indirect or collateral line marriage is forbidden between brother and sister, legitimate or illegitimate, and their spouses of the same degree.
Marriage is forbidden between uncle and niece and aunt and nephew.
It is, however, possible for good reasons to obtain a dispensation from the sovereign permitting a marriage within these prohibited degrees.
Formalities.—Marriage must be celebrated publicly before a civil officer of the State of the commune and in the commune where one of the contracting parties has his, or her, residence.
Objections by Third Persons.—Of course, a husband or wife of an existing marriage has the right to object formally to his or her spouse contracting another marriage.
The father, and, in default of the father, the mother, and, in default of the mother, the grandparents have the right to oppose a marriage of a child or grandchild who has not reached the age of twenty-five years.
Annulment.—A marriage which has been contracted without the free consent of the parties, or one of them, may be annulled in the courts, but only on the application of either of the parties when neither of them have given free consent, or on the application of the party whose free consent was not obtained.
When there has been an error concerning the identity of either of the parties to the contract the marriage can only be annulled at the instance of the party who has been misled or imposed upon.
A marriage which has been contracted without the consent of the father or mother, the ascendants, or the family council, where such consent was a necessary condition precedent, can only be annulled on the application of the person or persons whose consent was wanting.