International Civil Aviation Organization
Overview
 
The International Civil Aviation Organization (ICAO), pronounced /aɪˈkeɪoʊ/, (in French: Organisation de l'aviation civile internationale, OACI ), is a specialized agency of the United Nations
United Nations
The United Nations is an international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace...

. It codifies the principles and techniques of international air navigation and fosters the planning and development of international air transport to ensure safe and orderly growth. Its headquarters are located in the Quartier International
Quartier international de Montréal
The Quartier international de Montréal or Montreal's International District is a district of the Ville-Marie borough of downtown Montreal that underwent a major urban renewal as a central business district in 2000–2003.-Purpose:...

of Montreal
Montreal
Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...

, Quebec
Quebec
Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....

, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

.

The ICAO Council adopts standards and recommended practices concerning air navigation, its infrastructure, flight inspection
Flight inspection
The evaluation process, using properly equipped aircraft, regarding continuity, integrity and accuracy of significant parameters from radio navigation aids and procedures, aiming their calibration with international standards....

, prevention of unlawful interference, and facilitation of border-crossing procedures for international civil aviation
Civil aviation
Civil aviation is one of two major categories of flying, representing all non-military aviation, both private and commercial. Most of the countries in the world are members of the International Civil Aviation Organization and work together to establish common standards and recommended practices...

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