Regulations last checked for updates: Feb 07, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
All TitlesTitle 40Chapter IPart 81Subpart E - Subpart E—Identification of Interstate Transport Regions
View all text of Subpart E [§ 81.455 - § 81.457]
§ 81.455 - Scope.

This subpart identifies interstate transport regions established for national ambient air quality standards pursuant to section 184 or section 176A of the Clean Air Act.

authority: 42 U.S.C. 7401,
source: 36 FR 22421, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 81.455
© 2014 CustomsMobile | Disclaimer | Privacy | About