Family Code, Art. 105

In case the future spouses agree in the marriage settlements that the regime of conjugal partnership gains shall govern their property relations during marriage, the provisions in this Chapter shall be of supplementary application. The provisions of this Chapter shall also apply to conjugal partnerships of gains already established between spouses before the effectivity of this Code, without prejudice to vested rights already acquired in accordance with the Civil Code or other laws, as provided in Article 256. (n)