Regulations last checked for updates: Jun 19, 2026

Title 40 - Protection of Environment last revised: Aug 20, 2026
All TitlesTitle 40Chapter IPart 1033Subpart JAppendix Appendix A - Appendix A to Part 1033—Original Standards for Tier 0, Tier 1 and Tier 2 Locomotives
Collapse to view onlyAppendix Appendix A - Appendix A to Part 1033—Original Standards for Tier 0, Tier 1 and Tier 2 Locomotives
Table of Contents

authority: 42 U.S.C. 7401-7671q.
source: 73 FR 37197, June 30, 2008, unless otherwise noted.
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