Judgment of the Court (Sixth Chamber) of 22 June 2023.#LD v ALB FILS Kliniken GmbH.#Request for a preliminary ruling from the Bundesarbeitsgericht.#Reference for a preliminary ruling – Social policy – Temporary agency work – Directive 2008/104/EC – Article 1 – Scope – Definition of ‘temporary assignment’ – Transfer of duties performed by a worker, from the latter’s employer to a third-party undertaking – Permanent assignment of that worker while maintaining the latter’s initial contract of employment.#Case C-427/21.