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ICAO State Categories

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ICAO Membership

Countries are categorized by ICAO membership as follows:

  • A Contracting State of ICAO is a State which has adhered to the Chicago Convention on International Civil Aviation, whether or not it is a member of the United Nations (UN) and/or any of its other Agencies, e.g. Switzerland.
  • A non-Contracting State of ICAO, on the other hand, is a State which has not signed and does not adhere to the Chicago Convention, but which is a member of the UN and/or any of its other Agencies, e g. the Holy See.
  • Third category: that of States which are not signatories to the Convention on International Civil Aviation and which are not members of the United Nations nor of any of its Agencies. Very few States belong to this category, which has not been given a specific name.

Most countries in the world fall into the contracting state category. The non-contracting states are:

  • Dominica
  • Liechtenstein
  • Tuvalu

Countries in the third category are:

  • Kosovo
  • Palestinian Territories
  • Taiwan
  • Other countries of disputable recognition (i.e. recognized by some countries and not recognized by others)

Providers and Users

For purposes of planning and facilitating the follow-up of implementation of the required air navigation services and facilities, States have been categorized into two main groups:

  • Providers: countries which are geographically situated within the region or have territory in that region. They are responsible for the provision of the services and facilities required in the region.
  • Users: countries which are not located in the region but have air carriers on their registry which conduct international air traffic operations in the region.

A State may be both a 'provider' and a 'user' State in the region in which it is situated or in other regions in which it has territories.

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