This Act dictates that if a Prenuptial Agreement is deemed enforceable in one of the states that has signed on, it will be enforceable in all of the other states that have signed on. Postnup Before a couple gets married, there are always things to be considered. Bringing in people from different backgrounds to live together requires some sort of an agreement for peaceful coexistence. What has been dominating over time is the prenuptial agreement, popularly known as prenup. It offered a perfect way for settling. Are you buying, selling, or managing a piece of property? Let LegalTemplates help you get legally prepared with our real estate legal forms. Section 21 of the Property (Relationships) Act 1976 expressly authorizes married and de facto couples to enter into opt-out agreements with respect to the status, ownership and division of their property, including future property. The agreements must conform to certain formalities. They must be executed before a notary. The German Burgerliches Gesetzbuch (BGB) provides that a set matrimonial property regime, that of community of accrued gains or "Zugewinngemeinschaft," applies between the spouses automatically upon marriage unless they select another arrangement by contract.