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Regulations last checked for updates: May 17, 2025
Title 40 - Protection of Environment last revised: Nov 17, 2025
All Titles
Title 40
Chapter I
Part 86
Subpart T - Subpart T—Manufacturer-Run In-Use Testing Program for Heavy-Duty Diesel Engines
§ 86.1901 - What testing requirements apply to my engines that have gone into service?
§ 86.1905 - How does this program work?
§ 86.1908 - How must I select and screen my in-use engines?
§ 86.1910 - How must I prepare and test my in-use engines?
§ 86.1912 - How do I determine whether an engine meets the vehicle-pass criteria?
§ 86.1915 - What are the requirements for Phase 1 and Phase 2 testing?
§ 86.1917 - How does in-use testing under this subpart relate to the emission-related warranty in Section 207(a)(1) of the Clean Air Act?
§ 86.1920 - What in-use testing information must I report to EPA?
§ 86.1925 - What records must I keep?
§ 86.1930 - What special provisions apply from 2005 through 2010?
Appendix Appendix I - Appendix I to Subpart T of Part 86—Sample Graphical Summary of NTE Emission Results
authority:
42 U.S.C. 7401-7671q.
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