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U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 16, 2025

All TitlesTitle 18Chapter IIIPart 401Subpart I - Subpart I—General Provisions
§ 401.121 - Definitions.
§ 401.122 - Supplementary details.
§ 401.123 - Waiver of rules.
§ 401.124 - Construction.
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