Halle Berry recently married Olivier Martinez, a citizen of France, according to the July 29, 2013 edition of People magazine. If they have a child and then separate, what law will apply to their dispute over custody and support? Louisiana has rules concerning interstate and international custody battles. Obtaining custody or visitation rights if your “ex” has taken your child across the border can be a difficult, expensive, and unsatisfying experience. In such a situation, it is very important that you retain counsel before your child leaves the United States, if at all possible.