40 CFR § 1031.5 - Engines installed on domestic and foreign aircraft.

---
identifier: "/us/cfr/t40/s1031.5"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1031.5 - Engines installed on domestic and foreign aircraft."
title_number: 40
title_name: "Protection of Environment"
section_number: "1031.5"
section_name: "Engines installed on domestic and foreign aircraft."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "U"
subchapter_name: "AIR POLLUTION CONTROLS"
part_number: "1031"
part_name: "CONTROL OF AIR POLLUTION FROM AIRCRAFT ENGINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
regulatory_source: "87 FR 72351, Nov. 23, 2022, unless otherwise noted."
cfr_part: "1031"
---


# 1031.5 Engines installed on domestic and foreign aircraft.

The Secretary of Transportation shall apply these regulations to aircraft of foreign registry in a manner consistent with obligations assumed by the United States in any treaty, convention or agreement between the United States and any foreign country or foreign countries.