Judgment of the Court (Grand Chamber) of 5 September 2023.#X v Udlændinge- og Integrationsministeriet.#Request for a preliminary ruling from the Østre Landsret.#Reference for a preliminary ruling – Citizenship of the European Union – Article 20 TFEU – Article 7 of the Charter of Fundamental Rights of the European Union – Citizen holding the nationality of a Member State and the nationality of a third country – Loss of the nationality of the Member State by operation of law upon reaching the age of 22 on the ground of lack of a genuine link with that Member State where no application to retain nationality has been made before the date on which that age is reached – Loss of citizenship of the Union – Examination of the proportionality of the consequences of that loss from the point of view of EU law – Limitation period.#Case C-689/21.