Order of the Court (Sixth Chamber) of 26 September 2019.#YU v Wallonische Region.#Request for a preliminary ruling from the Gericht Erster Instanz Eupen.#Reference for a preliminary ruling — Freedom of movement for workers — Road traffic — Registration of motor vehicles — Driver resident in one Member State — Vehicle registered in another Member State — Vehicle made available to an employee by an employer established in that other Member State — Obligation to provide on the spot evidence of lawful use of such a vehicle during an inspection — Proportionality.#Case C-315/19.