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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 N - Subpart N—Exhaust Test Procedures for Heavy-duty Engines
§ 86.1301 - Scope; applicability.
§ 86.1305 - Introduction; structure of subpart.
§ 86.1333 - Transient test cycle generation.
§ 86.1360 - Supplemental emission test; test cycle and procedures.
§ 86.1362 - Steady-state testing with a ramped-modal cycle.
§ 86.1370 - Not-To-Exceed test procedures.
§ 86.1372 - Measuring smoke emissions within the NTE zone.
authority:
42 U.S.C. 7401-7671q.
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