14 CFR 21.613 - Duration.

§ 21.613 Duration.
(a) A TSO authorization or letter of TSO design approval is effective until surrendered, withdrawn, or otherwise terminated by the FAA.
(b) If a TSO is revised or canceled, the holder of an affected FAA letter of acceptance of a statement of conformance, TSO authorization, or letter of TSO design approval may continue to manufacture articles that meet the original TSO without obtaining a new acceptance, authorization, or approval but must comply with the requirements of this chapter.

Title 14 published on 2014-01-01

no entries appear in the Federal Register after this date.

Title 14 published on 2014-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 14 CFR 21 after this date.

  • 2015-02-23; vol. 80 # 35 - Monday, February 23, 2015
    1. 80 FR 9544 - Operation and Certification of Small Unmanned Aircraft Systems
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration
      Notice of proposed rulemaking (NPRM).
      Send comments on or before April 24, 2015.
      14 CFR Parts 21, 43, 45, 47, 61, 91, 101, 107, and 183