Regulations last checked for updates: Jan 18, 2025

Title 40 - Protection of Environment last revised: Dec 30, 2025
§ 98.508 - Definitions.

All terms used of this subpart have the same meaning given in the Clean Air Act and subpart A of this part.

source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.
cite as: 40 CFR 98.508