# The Air Navigation (Fourth Amendment) Order 1999, Article 3: Article 83 bis of the Chicago Convention


(1) In article 8(1) after “the country in which the aircraft is registered” there shall be inserted “or the State of the operator”.
(2) In article 15(1) after “the country in which the aircraft is registered” there shall be inserted “or the State of the operator”.
(3) In article 21(3)(a) after “the country in which the aircraft is registered” there shall be inserted “or the State of the operator”.
(4) In article 41(1) after “the country in which the aircraft is registered” there shall be inserted “or the State of the operator”.
(5) In article 118(1) after the definition of “Special VFR flight” there shall be inserted:
““State of the operator” means the State in which the operator of an aircraft has his principal place of business or, if he has no such place of business, his permanent residence, in circumstances where:
(a) that aircraft is registered in another Contracting State;
(b) the operator is operating that aircraft pursuant to an agreement for its lease, charter or interchange or any similar arrangement;
(c) the State in which that aircraft is registered has, by agreement with the State in which the operator of the aircraft has his principal place of business or, if he has no such place of business, his principal residence, agreed to transfer to it its functions and duties as State of registry in respect of that aircraft in relation to, in the case of article 8(1), airworthiness, in the case of article 15(1), aircraft radio equipment, in the case of article 21(3), flight crew licensing or, in the case of article 41(1), radio licensing; and
(d) the agreement has been registered with the Council of the International Civil Aviation Organisation or the existence and scope of the agreement have been directly communicated to the Authority.”.

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Source: https://www.legislation.gov.uk/uksi/1999/1123/article/3 (the official version)
Page: https://openlegislation.uk/air-navigation-fourth-amendment-order-1999/article-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.