Case C-254/18: Judgment of the Court (Second Chamber) of 11 April 2019 (request for a preliminary ruling from the Conseil d’État — France) — Syndicat des cadres de la sécurité intérieure v Premier ministre, Ministre de l’Intérieur, Ministre de l’Action et des Comptes publics (Reference for a preliminary ruling — Directive 2003/88/EC — Organisation of working time — Protection of the safety and health of workers — Maximum weekly working time — Reference period — Rolling or fixed nature — Derogation — Police officers)