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: Aug 21, 2025
Title 40 - Protection of Environment last revised: Nov 21, 2025
All Titles
Title 40
Chapter I
Part 281
Subpart E - Subpart E—Approval Procedures
§ 281.50 - Approval procedures for state programs.
§ 281.51 - Revision of approved state programs.
authority:
42 U.S.C. 6912
,
6991
,
6991
,
6991
,
6991
,
6991
source:
80 FR 41677, July 15, 2015, unless otherwise noted.
.list_box li,p,.cm-search-info,.cm-search-detail,.abt span,.expand-collapse_top
Get the CustomsMobile app!