Judgment of the Court (Tenth Chamber) of 28 October 2021.#BX v Unitatea Administrativ Teritorială D.#Request for a preliminary ruling from the Curtea de Apel Iaşi.#Reference for a preliminary ruling – Protection of the safety and health of workers – Directive 2003/88/EC – Organisation of working time – Article 2(1) and (2) – Concepts of ‘working time’ and ‘rest period’ – Mandatory vocational training undertaken at the employer’s request.#Case C-909/19.