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Regulations last checked for updates: Jan 18, 2025
Title 40 - Protection of Environment last revised: Dec 30, 2025
All Titles
Title 40
Chapter I
Part 66
Subpart 0 -
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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