U.S. Code of Federal Regulations

Regulations most recently checked for updates: Dec 13, 2025

All TitlesTitle 40Chapter IPart 205Subpart B - Subpart B—Medium and Heavy Trucks
§ 205.50 - Applicability.
§ 205.51 - Definitions.
§ 205.52 - Vehicle noise emission standards.
§ 205.54 - Test procedures.
§ 205.54-1 - Low speed sound emission test procedures.
§ 205.54-2 - Sound data acquisition system.
§ 205.55 - Requirements.
§ 205.55-1 - General requirements.
§ 205.55-2 - Compliance with standards.
§ 205.55-3 - Configuration identification.
§ 205.55-4 - Labeling-compliance.
§ 205.55-5 - Labeling-exterior. [Reserved]
§ 205.56 - Testing by the Administrator.
§ 205.57 - Selective enforcement auditing requirements.
§ 205.57-1 - Test request.
§ 205.57-2 - Test vehicle sample selection.
§ 205.57-3 - Test vehicle preparation.
§ 205.57-4 - Testing procedures.
§ 205.57-5 - Reporting of the test results.
§ 205.57-6 - Acceptance and rejection of batches.
§ 205.57-7 - Acceptance and rejection of batch sequence.
§ 205.57-8 - Continued testing.
§ 205.57-9 - Prohibition on distribution in commerce; manufacturer's remedy.
§ 205.58 - In-use requirements.
§ 205.58-1 - Warranty.
§ 205.58-2 - Tampering.
§ 205.58-3 - Instructions for maintenance, use and repair.
§ 205.59 - Recall of noncomplying vehicles.
Appendix Appendix I - Appendix I to Subpart B of Part 205
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