# The Air Navigation Order 2016, Article 49: Requirement for and validity of a national airworthiness review certificate

Extent: E+W+S+N.I.

(1) An aircraft with a national certificate of airworthiness must not fly unless it has a valid national airworthiness review certificate.
(2) Subject to articles ... 50, 56, 57, 58 and 253, a national airworthiness review certificate is valid for one year.

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Source: https://www.legislation.gov.uk/uksi/2016/765/article/49 (the official version)
Page: https://openlegislation.uk/air-navigation-order-2016/article-49
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.