Case C-56/20: Judgment of the Court (First Chamber) of 29 April 2021 (request for a preliminary ruling from the Verwaltungsgerichtshof Baden-Württemberg — Germany) — AR v Stadt Pforzheim (Reference for a preliminary ruling — Transport — Driving licences — Mutual recognition — Withdrawal of the licence in the territory of a Member State other than the issuing Member State — Affixing of an endorsement to the driving licence indicating that it is not valid within that Member State)