Any changes made to matrimonial agreements before the marriage is celebrated must be recorded by a deed drawn up in the same form. No change or counter-letter is, moreover, valid without the simultaneous presence and consent of all the persons who were parties in the marriage contract, or their proxies.
All changes and counter-letters, even if clothed in the forms prescribed by the preceding article, will be without effect with regard to third parties, if they have not been drawn up following the minute of the marriage contract; and the notary may not issue grosses or expéditions of the marriage contract without transcribing the change or counter-letter following it.
Once the marriage has been celebrated, no change may be made to the matrimonial property regime except by the effect of a judgment at the request of one of the spouses in the case of separation as to property or other judicial protective measures or by the effect of a notarial deed, where applicable homologated, in the case of the following article.