Regulations last checked for updates: Mar 14, 2025

Title 40 - Protection of Environment last revised: Nov 14, 2025
All TitlesTitle 40Chapter IPart 63Subpart RRRAppendix - Table 1 to Subpart RRR of Part 63—Emission Standards for New and Existing Affected Sources
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Appendix - Table 1 to Subpart RRR of Part 63—Emission Standards for New and Existing Affected Sources
[81 FR 38089, June 13, 2016]
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.
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