CELEX:62021CJ0528: Judgment of the Court (Fourth Chamber) of 27 April 2023.#M.D. v Országos Idegenrendészeti Főigazgatóság Budapesti és Pest Megyei Regionális Igazgatósága .#Request for a preliminary ruling from the Fővárosi Törvényszék.#Reference for a preliminary ruling – Immigration policy – Article 20 TFEU – Genuine enjoyment of the substance of the rights which flow from the status of EU citizenship – Article 47 of the Charter of Fundamental Rights of the European Union – Directive 2008/115/EC – Common standards and procedures in Member States for returning illegally staying third-country nationals – Articles 5, 11 and 13 – Direct effect – Right to an effective judicial remedy – Decision banning entry and stay adopted in respect of a third-country national, a family member of a minor EU citizen – Threat to national security – Failure to take into account the individual situation of that third-country national – Refusal to comply with a court decision suspending the effects of that prohibition decision – Consequences.#Case C-528/21.