The International Civil Aviation Organization (ICAO) is a United Nations specialized agency established by the Convention on International Civil Aviation (the Chicago Convention), signed on 7 December 1944 and entering into force on 4 April 1947. Headquartered in Montreal, Canada, ICAO works with its member states and industry groups to develop international Standards and Recommended Practices (SARPs), which states then implement through national civil aviation regulations.
ICAO's governance structure includes:
- The Assembly, composed of all member states, which meets at least once every three years to set policy and approve the budget.
- The Council, a permanent body of 36 states elected by the Assembly for three-year terms, which adopts SARPs as Annexes to the Chicago Convention.
- The Secretariat, led by a Secretary General, which supports technical work through bureaus covering air navigation, air transport, legal affairs, and administration.
The Chicago Convention currently has 19 technical Annexes covering areas such as personnel licensing, rules of the air, meteorological service, aeronautical charts, airworthiness, aircraft accident investigation, aerodromes, security, and environmental protection. ICAO does not regulate airlines directly; instead, sovereign states implement SARPs and ICAO audits compliance through the Universal Safety Oversight Audit Programme (USOAP) and the Universal Security Audit Programme (USAP).
Recent priorities include the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA), adopted by the 39th Assembly in 2016, and a long-term aspirational goal of net-zero CO₂ emissions from international aviation by 2050, adopted at the 41st Assembly in 2022. ICAO also coordinates responses to crises affecting aviation, including conflict-zone overflight risks and pandemic-related travel measures.
ICAO is distinct from the International Air Transport Association (IATA), which is a private trade association of airlines, not an intergovernmental body.
Example
In October 2022, ICAO's 41st Assembly in Montreal adopted a long-term aspirational goal of net-zero carbon emissions from international aviation by 2050.
Frequently asked questions
No. ICAO is an intergovernmental UN specialized agency that sets binding standards for states, while IATA is a private trade association representing airlines.
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