§ 21.217. Duration.
35 words·~1 min read·
/us/cfr/t14/s§ 21.217·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Unless sooner surrendered, superseded, revoked, or otherwise terminated, provisional airworthiness certificates are effective for the duration of the corresponding provisional type certificate, amendment to a provisional type certificate, or provisional amendment to the type certificate.