Case C-137/21: Judgment of the Court (Grand Chamber) of 5 September 2023 — European Parliament v European Commission (Action for failure to act — Regulation (EU) 2018/1806 — Point (f) of the first paragraph of Article 7 — List of third countries whose nationals must be in possession of visas when crossing the external borders of the Member States — List of third countries whose nationals are exempt from that requirement — Principle of reciprocity — Request to adopt a delegated act temporarily suspending the visa exemption for a 12-month period for nationals of the United States of America)