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Regulations last checked for updates: May 23, 2025

Title 40 - Protection of Environment last revised: Apr 23, 2028
All TitlesTitle 40Chapter IPart 66Subpart 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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