Chicago convention refers to a convention held in Chicago, Illinois in the U.S., which established rules of airspace, aircraft registration and safety. The convention details the rights of the signatories to convention in relation to air travel. It is also known as the Convention on International Civil Aviation.
Article 1 of the convention states that all states have complete and exclusive sovereignty over airspace above its territory.
The significant achievement of the Chicago convention was the establishment of the International Civil Aviation Organization (ICAO). The ICAO is a specialized agency of the United Nations charged with coordinating and regulating international air travel. The Convention also exempts air fuels from tax.