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Regulations last checked for updates: Feb 11, 2026
Title 40 - Protection of Environment last revised: Dec 22, 2026
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Title 40
Chapter I
Part 243
Subpart B - Subpart B—Requirements and Recommended Procedures
authority:
42 U.S.C. 6907
(a)(3), 6912(a)(1), and 6944(a)
source:
41 FR 6769, Feb. 13, 1976, unless otherwise noted.
cite as:
40 CFR 243.203
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