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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Sep 16, 2025
All Titles
Title 18
Chapter III
Part 401
Subpart I - Subpart I—General Provisions
§ 401.121 - Definitions.
§ 401.122 - Supplementary details.
§ 401.123 - Waiver of rules.
§ 401.124 - Construction.
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