Air law, the body of law directly or indirectly concerned with civil aviation. Aviation in this context extends to both heavier-than-air and lighter-than-air aircraft. Air-cushion vehicles are not regarded as aircraft by the International Civil Aviation Organization (ICAO), but the practice of individual states in this regard is not yet settled. The earliest legislation in air law was a 1784 decree of the Paris police forbidding balloon flights without a special permit.

Source: https://www.britannica.com/topic/air-law