40 CFR § 166.28 - Duration of exemption.

---
identifier: "/us/cfr/t40/s166.28"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 166.28 - Duration of exemption."
title_number: 40
title_name: "Protection of Environment"
section_number: "166.28"
section_name: "Duration of exemption."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "E"
subchapter_name: "PESTICIDE PROGRAMS"
part_number: "166"
part_name: "EXEMPTION OF FEDERAL AND STATE AGENCIES FOR USE OF PESTICIDES UNDER EMERGENCY CONDITIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 136p, and 136w."
regulatory_source: "51 FR 1902, Jan. 15, 1986, unless otherwise noted."
cfr_part: "166"
---


# 166.28 Duration of exemption.

(a) *Specific or public health exemptions.* EPA shall allow use of a pesticide under a specific or public health exemption for as long a period as is reasonably expected to be necessary but in no case for longer than 1 year.

(b) *Quarantine exemption.* EPA shall allow use of a pesticide under a quarantine exemption for as long a period as is deemed necessary but in no case for longer than 3 years. Quarantine exemptions may be renewed. Interim reports containing the information specified in § 166.32(b) to the extent available shall be filed annually.