14 C.F.R. § 21.51 Duration.
Title 14 - Aeronautics and Space
A type certificate is effective until surrendered, suspended, revoked, or a termination date is otherwise established by the Administrator.
Title 14: Aeronautics and Space
PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS
Subpart B—Type Certificates
§ 21.51 Duration.