The international framework

Why the Chicago Convention exists

International flying needs common rules without removing each State’s sovereignty.

From wartime coordination to a permanent organisation

Delegates met at Chicago in 1944 to agree a framework for the peaceful development of civil aviation after the Second World War. The Convention was signed on 7 December 1944. A provisional organisation preceded ICAO; the permanent organisation came into being when the Convention entered into force in 1947. The result was a common legal and technical framework, rather than one worldwide airline or one worldwide licensing authority.

The Convention applies to civil aircraft. Military, customs and police aircraft are State aircraft; they need authorisation to fly over another State and must operate with due regard for civil aviation safety. A civil operator does not become a State aircraft merely because its passenger works for a government.

Sovereignty has a geographical boundary

A State has complete and exclusive sovereignty over the airspace above its territory, including its territorial waters. Airspace over the high seas is not another coastal State’s sovereign airspace. ICAO rules apply over the high seas; responsibility for providing an oceanic ATS service does not confer sovereignty over the ocean beneath it.

A flight information region is a service boundary. A national border is a legal boundary. They can have different shapes: a State may provide services in delegated airspace or over the high seas without acquiring territorial rights.

Overflight, entry and traffic rights

Separate permission to enter airspace from permission to sell transport.

Scheduled and non-scheduled operations

Article 5 establishes rights for non-scheduled civil flights, including transit without landing and stops for non-traffic purposes, subject to the Convention’s conditions and the State’s right to require landing. Taking on or discharging remunerated traffic remains subject to the State’s conditions. Article 6 requires special permission or other authorisation for a scheduled international air service.

Cabotage is carriage between two points within another State. The Convention permits States to refuse it. A route clearance issued by ATC does not itself grant commercial traffic rights, immigration clearance or a permit required for the flight.

What the border authority can require

An entering or departing aircraft must use a designated customs airport where the State’s regulations require it. Authorities may search an aircraft and inspect certificates and documents without unreasonable delay. Rules on admission, departure, immigration and customs apply to the aircraft, crew, passengers and cargo.

The State’s rules of the air apply within its territory; they must remain as uniform as possible with the international framework. Over the high seas the rules established under the Convention apply. Check the relevant AIP and notifications of differences instead of assuming that a procedure familiar at home is universal.

Documents, recognition and differences

Recognition of a certificate depends on the international standard behind it.

A documentary chain

For an international flight the Chicago Convention’s document list includes registration and airworthiness certificates, appropriate crew licences, the journey log, the radio station licence if radio equipment is fitted, and passenger and cargo documents as applicable. A certificate of registration identifies nationality; it does not prove airworthiness. A flight crew licence identifies privileges; it does not replace a valid rating or medical certificate.

The State of Registry issues or validates airworthiness certificates and crew licences for the purposes of the Convention. Other Contracting States recognise them when the underlying requirements meet or exceed ICAO minimum standards. A certificate or licence that falls short must be endorsed accordingly; international operations with that endorsement need permission from the States entered.

Standards are not self-executing permission

ICAO Standards and Recommended Practices are adopted in Annexes. A State unable to comply with a Standard, or adopting a different rule, must notify ICAO under Article 38. Relevant operational differences belong in the AIP, normally GEN 1.7. A Recommended Practice expresses a desirable measure; it has a different formal status from a Standard.

The Convention also permits national control of photographic equipment and restrictions on certain cargo. Munitions or implements of war require the State’s permission. The PIC needs the actual route permissions and documents, not an assumption that ICAO membership removes national restrictions.

Who makes the international framework?

Match the institution to its function.

ICAO organs

ICAO promotes safe and orderly international civil aviation, technical development, efficient air transport and fair opportunities for States. The Assembly represents the Contracting States and normally meets every three years to set policy and approve the programme and budget. The Council is the permanent governing body elected by the Assembly and adopts Standards and Recommended Practices.

The Air Navigation Commission provides technical advice and considers proposals for Annex provisions. It does not issue an individual pilot’s licence. The Secretariat supports the organisation’s work. Do not confuse the technical body that develops a proposal with the Council that adopts Annex material.

Know where a rule belongs

The Annex system covers personnel licensing (1), rules of the air (2), meteorology (3), charts (4), units (5), aircraft operations (6), nationality and registration (7), airworthiness (8), facilitation (9), telecommunications (10), ATS (11), SAR (12), investigations (13), aerodromes (14), AIS (15), environment (16), security (17), dangerous goods (18) and safety management (19).

PANS documents contain procedures, including PANS-ATM (Doc 4444) and PANS-OPS (Doc 8168). They are not additional numbered Annexes. An operator’s procedures implement applicable requirements for a particular operation; they do not have authority to overrule the law.

Can you apply the rules?

Four original questions. Choose from the facts, then review the explanation.