Regulations last checked for updates: May 14, 2025

Title 40 - Protection of Environment last revised: Apr 14, 2028
All TitlesTitle 40Chapter IPart 55Appendix Appendix A - Appendix A to Part 55—Listing of State and Local Requirements Incorporated by Reference Into Part 55, by State
Collapse to view onlyAppendix Appendix A - Appendix A to Part 55—Listing of State and Local Requirements Incorporated by Reference Into Part 55, by State
Table of Contents

authority: Section 328 of the Clean Air Act (42 U.S.C. 7401,
source: 57 FR 40806, Sept. 4, 1992, unless otherwise noted.
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