Judgment of the Court (Eighth Chamber) of 4 February 2021.#DQ v Ministre de la Transition écologique et solidaire and Ministre de l'Action et des Comptes publics.#Request for a preliminary ruling from the Conseil d'État.#Reference for a preliminary ruling – Civil service – Transfer of retirement pension rights – Staff Regulations of Officials of the European Union – Article 11 of Annex VIII – Officials and temporary staff reinstated in their national administration of origin after a period of non-active status and the performance of duties in an EU institution.#Case C-903/19.