Regulations last checked for updates: Jul 04, 2025

Title 40 - Protection of Environment last revised: Nov 04, 2025
All TitlesTitle 40Chapter IPart 63Subpart HHHHAppendix - Table 2 to Subpart HHHH of Part 63—Applicability of General Provisions (40 CFR Part 63, Subpart A) to Subpart HHHH
Collapse to view onlyAppendix - Table 2 to Subpart HHHH of Part 63—Applicability of General Provisions (40 CFR Part 63, Subpart A) to Subpart HHHH
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authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.
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