REGULATIONS
Rulings
AD/CVD
Notices
HTSUS
U.S. Code
Regs
More
Ports
About
Updates
Apps
Larger font
Smaller font
SEARCH
Sort by Rank
Titles Ascending
Titles Descending
10 per page
25 Result/page
50 Result/page
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 1039
Subpart F - Subpart F—Test Procedures
§ 1039.501 - How do I run a valid emission test?
§ 1039.505 - How do I test engines using steady-state duty cycles, including ramped-modal testing?
§ 1039.510 - Which duty cycles do I use for transient testing?
§ 1039.515 - What are the test procedures related to not-to-exceed standards?
§ 1039.520 - What testing must I perform to establish deterioration factors?
§ 1039.525 - How do I adjust emission levels to account for infrequently regenerating aftertreatment devices?
authority:
42 U.S.C. 7401-7671q.
source:
69 FR 39213, June 29, 2004, unless otherwise noted.
.list_box li,p,.cm-search-info,.cm-search-detail,.abt span,.expand-collapse_top
Get the CustomsMobile app!