§21.217. Duration.
14 C.F.R. § 21.217
Unless sooner surrendered, superseded, revoked, or otherwise terminated, provisional airworthiness certificates are effective for the duration of the corresponding provisional type certificate,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.
Notes, amendments, and revision history
Source
Source: Docket No. 5085, 29 FR 14571, Oct. 24, 1964, unless otherwise noted.
Authority
Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.