Convention on International Civil Aviation — international treaty that established the ICAO
Established the ICAO and set binding international rules for airspace, aircraft registration, safety, and air travel rights across 193 state parties.
Key Facts
- Signing date
- December 7, 1944
- Original signatories
- 52 states
- Entry into force
- April 4, 1947
- Requisite ratification reached
- March 5, 1947 (26th ratification)
- State parties as of March 2019
- 193
- Times revised
- 8 (1959–2006)
By the Numbers
Location
Cause → Event → Consequence
The rapid expansion of aviation technology during World War II made clear that international air travel required a unified legal framework. Existing bilateral arrangements were inadequate to govern post-war civil aviation, prompting Allied nations to convene a multilateral conference to establish common standards for airspace sovereignty, safety, and navigation rights.
On December 7, 1944, representatives of 52 states gathered in Chicago and signed the Convention on International Civil Aviation. The treaty defined rules governing airspace, aircraft registration and safety, taxation, and the rights of signatory states, and created the International Civil Aviation Organization to administer and enforce these standards on an ongoing basis.
ICAO came into existence on April 4, 1947, and became a specialized agency of the United Nations later that year. The convention provided the legal and regulatory backbone for modern international civil aviation, and has grown to include 193 state parties, making it one of the most widely ratified international treaties governing transportation.
Political Outcome
The convention entered into force on April 4, 1947, creating ICAO as the principal intergovernmental body for international civil aviation regulation, later integrated into the UN system.
International air travel governed by inadequate bilateral agreements with no unified regulatory body
ICAO established as UN specialized agency setting binding global standards for civil aviation