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Regulations last checked for updates: Jun 17, 2025
Title 40 - Protection of Environment last revised: Nov 17, 2025
All Titles
Title 40
Chapter I
Part 66
Subpart D - Subpart D—Exemption Requests; Revocation of Exemptions
§ 66.31 - Exemptions based on an order, extension or suspension.
§ 66.32 - De Minimis exemptions.
§ 66.33 - De Minimis exemptions: malfunctions.
§ 66.34 - Termination of exemptions.
§ 66.35 - Revocation of exemptions.
authority:
Sec. 120, Clean Air Act, as amended,
42 U.S.C. 7420.
source:
45 FR 50110, July 28, 1980, unless otherwise noted.
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