C.F.R. » Title 14 » CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION › SUBCHAPTER G—AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS › PART 137—AGRICULTURAL AIRCRAFT OPERATIONS › Subpart B—Certification Rules

14 C.F.R. § 137.21

Duration of certificate

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An agricultural aircraft operator certificate is effective until it is surrendered, suspended, or revoked. The holder of an agricultural aircraft operator certificate that is suspended or revoked shall return it to the Administrator.