# The Air Navigation Order 2016, Paragraph 5


The aircraft and its engines must be certified as fit for flight by—
(a) in the case of an aircraft referred to in paragraph 1(c) or (d), a person authorised by an organisation approved for the purpose by the CAA, and in accordance with that approval; and
(b) in all other cases—
(i) the holder of an aircraft maintenance engineer's licence granted under this Order, being a licence which entitles the holder to issue that certificate; or
(ii) a person approved by the CAA for the purpose of issuing certificates under this condition, and in accordance with that approval.

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Source: https://www.legislation.gov.uk/uksi/2016/765/schedule/3/part/1/chapter/1/paragraph/5 (the official version)
Page: https://openlegislation.uk/air-navigation-order-2016/schedule-3/part-1/chapter-1/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.