14 CFR § 137.3 - Definition of terms.

---
identifier: "/us/cfr/t14/s137.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 137.3 - Definition of terms."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "137.3"
section_name: "Definition of terms."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "G"
subchapter_name: "AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS"
part_number: "137"
part_name: "AGRICULTURAL AIRCRAFT OPERATIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(g), 40103, 40113, 44701-44702."
regulatory_source: "Docket 1464, 30 FR 8106, June 24, 1965, unless otherwise noted."
cfr_part: "137"
---


# 137.3 Definition of terms.

For the purposes of this part—

*Agricultural aircraft operation* means the operation of an aircraft for the purpose of (1) dispensing any economic poison, (2) dispensing any other substance intended for plant nourishment, soil treatment, propagation of plant life, or pest control, or (3) engaging in dispensing activities directly affecting agriculture, horticulture, or forest preservation, but not including the dispensing of live insects.

*Economic poison* means (1) any substance or mixture of substances intended for preventing, destroying, repelling, or mitigating any insects, rodents, nematodes, fungi, weeds, and other forms of plant or animal life or viruses, except viruses on or in living man or other animals, which the Secretary of Agriculture shall declare to be a pest, and (2) any substance or mixture of substances intended for use as a plant regulator, defoliant or desiccant.

[Docket 1464, 30 FR 8106, June 24, 1965, as amended by Amdt. 137-3, 33 FR 9601, July 2, 1968]