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Regulations last checked for updates: May 04, 2025
Title 40 - Protection of Environment last revised: Nov 04, 2025
All Titles
Title 40
Chapter I
Part 51
Subpart A - Subpart A—Air Emissions Reporting Requirements
authority:
23 U.S.C. 101
;
42 U.S.C. 7401-7671q.
source:
36 FR 22398, Nov. 25, 1971, unless otherwise noted.
cite as:
40 CFR 51.10
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