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Regulations last checked for updates: Oct 29, 2025
Title 40 - Protection of Environment last revised: Sep 29, 2029
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Title 40
Chapter I
Part 120 - PART 120—DEFINITION OF WATERS OF THE UNITED STATES
§ 120.1 - Purpose and scope.
§ 120.2 - Definitions.
authority:
33 U.S.C. 1251
source:
85 FR 22340, Apr. 21, 2020, unless otherwise noted.
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