If one of the spouses is unable to express his or her will, the other may be empowered by the court to represent him or her, generally or for certain specific acts, in the exercise of the powers resulting from the matrimonial property regime, the conditions and extent of such representation being determined by the judge.
In the absence of legal authority, mandate or empowerment by the court, acts performed by one spouse in representation of the other have effect, with regard to the latter, according to the rules of business management.