CELEX:62021CJ0127: Judgment of the Court (Third Chamber) of 16 March 2023.#American Airlines, Inc. v European Commission.#Appeal – Regulation (EC) No 139/2004 – Concentrations between undertakings – Air transport market – Concentration declared compatible with the internal market – Commitments entered into by the parties to the concentration – Decision granting grandfathering rights – Concept of ‘appropriate use’.#Case C-127/21 P.