Berezowski, Cezary Keywords: Development of international law | Air law | Mots clefs: Développement du droit international | Droit aérien | ABSTRACT Cezary Berezowski, points out that the object of air law, is the relations in airspace, which may be national relations or, international relations by possessing a foreign element. The author begins his course on air law, after some preliminary observations, with a study of the development of legal rules and airspace. He then focuses on the development of legal rules rel…