Judgment of the Court (Ninth Chamber) of 22 June 2023.#Gmina Miasto Gdynia and Port Lotniczy Gdynia-Kosakowo sp. z o.o. v European Commission.#Appeal – State aid – Airport infrastructure – Public funding granted to the Gdynia-Kosakowo Airport – Decision declaring the aid measure incompatible with the internal market and ordering its recovery – Identification of the advantage and determination of the amount of the aid to be repaid – Principles of the protection of legitimate expectations, legal certainty, effective judicial protection, sound administration and sincere cooperation – Procedural rights of the appellants.#Case C-163/22 P.