Case C-742/19: Judgment of the Court (Grand Chamber) of 15 July 2021 (request for a preliminary ruling from the Vrhovno sodišče Republike Slovenije — Slovenia) — B.K. v Republika Slovenija (Ministrstvo za obrambo) (Reference for a preliminary ruling — Protection of the safety and health of workers — Organisation of working time — Members of the armed forces — Applicability of EU law — Article 4(2) TEU — Directive 2003/88/EC — Scope — Article 1(3) — Directive 89/391/EEC — Article 2(2) — Military activities — Concept of ‘working time’ — Stand-by period — Dispute concerning the remuneration of a worker)