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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 40
Chapter I
Part 121 - PART 121—STATE CERTIFICATION OF ACTIVITIES REQUIRING A FEDERAL LICENSE OR PERMIT
Subpart A [§ 121.1 - § 121.11] - Subpart A—General
Subpart B [§ 121.12 - § 121.15] - Subpart B—Neighboring Jurisdictions
Subpart C [§ 121.16 - § 121.17] - Subpart C—Certification by the Administrator
Subpart D [§ 121.18 - § 121.18] - Subpart D—Review and Advice
Subpart E [§ 121.19 - § 121.19] - Subpart E—Severability
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