PART 4Airworthiness of Aircraft
CHAPTER 3Continuing airworthiness for Non-Part-21 aircraft
Circumstances where a certificate of release to service is not required45.
An aircraft to which article 44 applies does not require to have in force a certificate of release to service issued under this Order if it has in force a certificate of release to service issued in accordance with paragraph 21A.163(d) of Part 21.