Article 3
The matrimonial property regime is governed by the internal law designated by the spouses before marriage. The spouses may designate only one of the following laws - 1. the law of any State of which either spouse is a national at the time of designation; 2. the law of the State in which either spouse has his habitual residence at the time of designation; 3. the law of the first State where one of the spouses establishes a new habitual residence after marriage. The law thus designated applies to the whole of their property. Nonetheless, the spouses, whether or not they have designated a law under the previous paragraphs, may designate with respect to all or some of the immovables, the law of the place where these immovables are situated. They may also provide that any immovables which may subsequently be acquired shall be governed by the law of the place where such immovables are situated.