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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 40
Chapter I
Part 1039
Subpart I - Subpart I—Definitions and Other Reference Information
§ 1039.801 - What definitions apply to this part?
§ 1039.805 - What symbols, acronyms, and abbreviations does this part use?
§ 1039.815 - What provisions apply to confidential information?
§ 1039.820 - How do I request a hearing?
§ 1039.825 - What reporting and recordkeeping requirements apply under this part?
Appendix Appendix I - Appendix I to Part 1039—Summary of Previous Emission Standards
Appendix Appendix II - Appendix II to Part 1039—Steady-State Duty Cycles
Appendix - Appendixes III-V to Part 1039 [Reserved]
Appendix Appendix VI - Appendix VI to Part 1039—Nonroad Compression-ignition Composite Transient Cycle
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