Case C-46/21 P: Judgment of the Court (Fifth Chamber) of 9 March 2023 — European Union Agency for the Cooperation of Energy Regulators v Aquind Ltd (Appeal — Energy — Regulation (EC) No 714/2009 — Article 17 — Request for exemption relating to an electricity interconnector — Refusal decision from the European Union Agency for the Cooperation of Energy Regulators (ACER) — Regulation (EC) No 713/2009 — Article 19 — Board of Appeal of ACER — Intensity of the review)