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Regulations last checked for updates: May 23, 2025
Title 23 - Highways last revised: May 19, 2025
All Titles
Title 23
Chapter I
Part 650
Subpart E - Subpart E—National Tunnel Inspection Standards
§ 650.501 - Purpose.
§ 650.503 - Applicability.
§ 650.505 - Definitions.
§ 650.507 - Tunnel inspection organization responsibilities.
§ 650.509 - Qualifications of personnel.
§ 650.511 - Inspection interval.
§ 650.513 - Inspection procedures.
§ 650.515 - Inventory.
§ 650.517 - Incorporation by reference.
authority:
23 U.S.C. 119
,
144
,
and
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