Judgment of the Court (Grand Chamber) of 9 April 2024.#European Commission v Council of the European Union.#Action for annulment – Decision (EU) 2021/1117 – Implementing Protocol to the Fisheries Partnership Agreement between the Gabonese Republic and the European Community (2021-2026) – Signing on behalf of the European Union – Institution competent to designate the person empowered to sign – Article 13(2) TEU – Observance by each institution of the limits of the powers conferred on it – Mutual sincere cooperation between the EU institutions – Article 16(1) and (6) TEU – Power of the Council of the European Union to make policies and plan the EU’s external action – Article 17(1) TEU – Power of the European Commission to ensure the external representation of the European Union – Article 218 TFEU.#Case C-551/21.