§ 21.77 - Duration.

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Unless sooner surrendered, superseded, revoked, or otherwise terminated, provisional type certificates and amendments thereto are effective for the periods specified in this section.

A Class I provisional type certificate is effective for 24 months after the date of issue.

A Class II provisional type certificate is effective for twelve months after the date of issue.

An amendment to a Class I or Class II provisional type certificate is effective for the duration of the amended certificate.

A provisional amendment to a type certificate is effective for six months after its approval or until the amendment of the type certificate is approved, whichever is first.