Title 49, TransportationRelease 119-110

§14506 Identification of Vehicles

Title 49 › SUBTITLE IV — INTERSTATE TRANSPORTATION › PART B — MOTOR CARRIERS, WATER CARRIERS, BROKERS, AND FREIGHT FORWARDERS › CHAPTER 145 — FEDERAL-STATE RELATIONS › § 14506

Last updated Sep 22, 2026|Official source

Summary

States and local governments may not make motor carriers, private carriers, freight forwarders, or leasing companies put extra ID on or inside a commercial motor vehicle, except for the ID the U.S. Secretary of Transportation requires under 49 C.F.R. 390.21. A State can still require certain credentials: those under the International Registration Plan (section 31704); those under the International Fuel Tax Agreement (section 31705) or a State highway‑use tax form if, on October 1, 2006, the State used a form not collected through IFTA; State license plates or displays the Secretary approves; rules for hazardous materials (section 5103); and federal vehicle inspection rules (section 31136).

Full Legal Text

Title 49, §14506

Transportation, Source: USLM XML via OLRC

(a)Restriction on Requirements.—
No State, political subdivision of a State, interstate agency, or other political agency of two or more States may enact or enforce any law, rule, regulation standard, or other provision having the force and effect of law that requires a motor carrier, motor private carrier, freight forwarder, or leasing company to display any form of identification on or in a commercial motor vehicle (as defined in section 14504a), other than forms of identification required by the Secretary of Transportation under section 390.21 of title 49, Code of Federal Regulations.
(b)Exception.—
Notwithstanding subsection (a), a State may continue to require display of credentials that are required—
(1)under the International Registration Plan under section 31704;
(2)under the International Fuel Tax Agreement under section 31705 or under an applicable State law if, on October 1, 2006, the State has a form of highway use taxation not subject to collection through the International Fuel Tax Agreement;
(3)under a State law regarding motor vehicle license plates or other displays that the Secretary determines are appropriate;
(4)in connection with Federal requirements for hazardous materials transportation under section 5103; or
(5)in connection with the Federal vehicle inspection standards under section 31136.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

Amendments

2008—Subsec. (b)(2). Pub. L. 110–244 inserted “or under an applicable State law if, on October 1, 2006, the State has a form of highway use taxation not subject to collection through the International Fuel Tax Agreement” before semicolon at end.

Reference

Citations & Metadata

Citation

49 U.S.C. § 14506

Title 49, Transportation

Last Updated

Sep 22, 2026

Release point: 119-110