14 C.F.R. § 133.13 Duration of certificate.
Title 14 - Aeronautics and Space
Unless sooner surrendered, suspended, or revoked, a Rotorcraft External-Load Operator Certificate expires at the end of the twenty-fourth month after the month in which it is issued or renewed. [Doc. No. 15176, 42 FR 24198, May 12, 1977, as amended by Amdt. 133–7, 42 FR 32531, June 27, 1977; Amdt. 133–9, 51 FR 40707, Nov. 7, 1986]
Title 14: Aeronautics and Space
PART 133—ROTORCRAFT EXTERNAL-LOAD OPERATIONS
Subpart B—Certification Rules
§ 133.13 Duration of certificate.
