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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 121
Subpart A - Subpart A—General
§ 121.1 - Definitions.
§ 121.2 - When certification is required.
§ 121.3 - Scope of certification.
§ 121.4 - Pre-filing meeting requests.
§ 121.5 - Request for certification.
§ 121.6 - Reasonable period of time.
§ 121.7 - Certification decisions.
§ 121.8 - Extent of Federal agency review.
§ 121.9 - Failure or refusal to act.
§ 121.10 - Modification to a grant of certification.
§ 121.11 - Requirements for Indian Tribes to administer a water quality certification program.
authority:
33 U.S.C. 1251
source:
88 FR 66661, Sept. 27, 2023, unless otherwise noted.
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