Regulations last checked for updates: Feb 21, 2025

Title 40 - Protection of Environment last revised: Nov 21, 2025

WHAT THIS SUBPART COVERS
EMISSION STANDARDS FOR MANUFACTURERS
EMISSION STANDARDS FOR OWNERS AND OPERATORS
OTHER REQUIREMENTS FOR OWNERS AND OPERATORS
COMPLIANCE REQUIREMENTS FOR MANUFACTURERS
COMPLIANCE REQUIREMENTS FOR OWNERS AND OPERATORS
TESTING REQUIREMENTS FOR OWNERS AND OPERATORS
NOTIFICATION, REPORTS, AND RECORDS FOR OWNERS AND OPERATORS
GENERAL PROVISIONS
MOBILE SOURCE PROVISIONS
DEFINITIONS
authority: 42 U.S.C. 7401
source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.