Under which article of the Chicago Convention is the principle of non-discrimination in air transport established?

The principle of non-discrimination in air transport is established under Article 15 of the Chicago Convention. This article specifically addresses the issue of discrimination by stating that each contracting state must ensure that the charges imposed for the use of airports and other air navigation facilities on aircraft are reasonable and not discriminatory. This means that states are obligated to provide fair treatment to all airlines and to avoid practices that would favor one carrier over another. The emphasis is on creating a level playing field for airlines operating internationally, fostering competition and enhancing the efficiency of air services. This principle is crucial in promoting cooperation and trust among nations in the aviation sector, ensuring that all carriers have equal access to essential facilities. The other articles mentioned do not specifically address non-discriminatory practices, focusing instead on different aspects of international air law.