The International Civil Aviation Organization (ICAO) is an agency of the United Nations based in Montreal, Canada. It was created by the Convention on International Civil Aviation 1944 (the “Chicago Convention”) and came into being in 1947. Information on the Chicago Convention includes texts of all nine editions to date, and a list of contracting states. “Treaty Collection” (found under “About ICAO”) includes lists of parties to multilateral air law treaties from the Warsaw Convention (1929) onwards, and status information on individual states with regard to multilateral air law treaties. Further legal information is provided by ICAO’s Legal Affairs and External Relations Bureau (within the site’s “Secretariat” section).