By its third question, the national court is essentially asking whether national rules concerning the determination of the date on which a vehicle was first authorised for use on the public highway, such as the regulation, are covered by Directive 83/189.
Par sa troisième question, la juridiction de renvoi demande, en substance, si une réglementation nationale relative à la fixation de la date de la première admission à la circulation d'un véhicule, telle que le règlement, relève du champ d'application de la directive 83/189.