Case C-173/23, Air Europa Líneas Aéreas: Judgment of the Court (Third Chamber) of 11 April 2024 (request for a preliminary ruling from the Juzgado de lo Mercantil n.o 1 de Palma de Mallorca – Spain) – Eventmedia Soluciones SL v Air Europa Líneas Aéreas SAU (Reference for a preliminary ruling – Air transport – Montreal Convention – Article 19 – Compensation for damage occasioned by delay in the carriage of baggage – Assignment to a commercial company of the passenger’s claim against the air carrier – Contractual clause prohibiting such an assignment – Directive 93/13/EC – Unfair terms in consumer contracts – Article 6(1) and Article 7(1) – Review of its own motion of the unfairness of the clause prohibiting the assignment of passenger rights – Detailed rules for that review in the context of a dispute between the assignee company and the air carrier – Principles of equivalence and effectiveness