Appendix I. On Invalid Marriage

If any marriage is found to be invalid, the case must be provided for in different ways according to the circumstances: namely, either by leaving the parties in good faith, or by permitting them to live as brother and sister, or by declaring the nullity of the marriage, or by convalidating the marriage. Which mode ought to be chosen will be clear from what is to be said. Ordinarily, however, one must recur either to a declaration of the nullity of the marriage, or, and especially indeed, to convalidation of the marriage. Hence: