---
kind: "section"
citation: "14 C.F.R. § 137.21"
title: "14"
number: "137.21"
heading: "Duration of certificate."
url: "https://uscodex.org/cfr/14/137.21"
---

# §137.21. Duration of certificate.


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.


## Notes

### Authority

Authority: 49 U.S.C. 106(g), 40103, 40113, 44701-44702.

### Source

Source: Docket 1464, 30 FR 8106, June 24, 1965, unless otherwise noted.