<P>The informed choice of both spouses is a basic principle of this Regulation. Each spouse should know exactly what are the legal and social implications of the choice of applicable law. The possibility of choosing the applicable law by common agreement should be without prejudice to the rights of, and equal opportunities for, the two spouses. Hence judges in the participating Member States should be aware of the importance of an informed choice on the part of the two spouses concerning the legal implications of the choice-of-law agreement concluded.</P>