Judgment of the Court (Second Chamber) of 15 December 2022.#CM v TimePartner Personalmanagement GmbH.#Reference for a preliminary ruling – Employment and social policy – Temporary agency work – Directive 2008/104/EC – Article 5 – Principle of equal treatment – Need to respect, in the event of derogation from that principle, the overall protection of temporary agency workers – Collective agreement providing for lower pay than that of staff recruited directly by the user undertaking – Effective judicial protection – Judicial review.#Case C-311/21.