PART 4U.K.Airworthiness of Aircraft

CHAPTER 1U.K.Airworthiness – general

Requirement for a certificate of release to service for [F1Part-21] aircraftU.K.

35.  [F2A Part-21] aircraft must not fly when a certificate of release to service is required by or under Part M or Part 145 unless such a certificate has been issued in accordance with Part M or Part 145 and is in force.