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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 40
Chapter I
Part 1054
Subpart F - Subpart F—Test Procedures
§ 1054.501 - How do I run a valid emission test?
§ 1054.505 - How do I test engines?
§ 1054.520 - What testing must I perform to establish deterioration factors?
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