The judge may appoint one or more parents or relatives, or, where applicable, any other persons to represent the person presumed absent in the exercise of his rights or in any act in which he may be interested, and to administer all or part of his property ; the representation of the person presumed absent and the administration of his property are then subject, subject to the provisions of this chapter, to the rules applicable to guardianship of adults without a family council, or, exceptionally and by express decision of the judge, to the rules of family habilitation if the representative is one of the persons mentioned in article 494-1.