1, initial stage (19 19-1945): the civil aviation law in this stage is mainly adjusted by the domestic laws of various countries, while the international civil aviation law has not yet been formed. The main laws and regulations in this period are the Air Mail Act of the United States (1925) and the Air Navigation Act of the United Kingdom (1920).
2. Internationalization stage (1945-1990): After World War II, the International Civil Aviation Organization (ICAO) was established and the international civil aviation law began to take shape gradually. At this stage, ICAO has formulated a series of international conventions, recommended documents and standards, which provide important reference and basis for civil aviation laws of various countries.
3. Modernization stage (1990 till now): With the rapid development of aviation industry, civil aviation law is facing new challenges and problems. At this stage, civil aviation law began to pay more attention to aviation safety, environmental protection and the protection of consumers' rights and interests, and gradually turned to digital and network development. In addition, the cooperation of civil aviation law among countries is also closer, which provides strong support for the development of global air transport industry.