FMCSA Motor Carrier Identification — 49 CFR 390.21
Regulation 49 CFR 390.21 · Canada
§The Law
49 CFR 390.21 — Regulation 49 CFR 390.21
“All commercial motor vehicles operated in the US must display the USDOT number and operating carrier name on both sides of the power unit per 49 CFR 390.21.”
View official regulation text✓Plain English
Any truck operating in the USA needs a USDOT number and the operating company name on both sides of the cab — even if the truck is Canadian.
Ready to Order?
Get compliant cross-border compliance markings — from $29.99. Ships 1-2 business days.
Specific Requirements
USDOT number on both sides — 2" min
Operating carrier name both sides
Applies to any vehicle operating in USA
Includes Canadian trucks crossing border
Get Compliant — Order Today
Professional-grade compliance markings. Ships in 1-2 business days. 5+ year outdoor durability guaranteed.
Cross-Border Trucking Kit
North American Compliance Bundle
DOT Conspicuity Tape
📚Sources & Authority
Every claim on this page is backed by official government legislation and verified industry sources. Last verified: March 2026.
🏛 Official Government Sources
FMCSA — Federal Motor Carrier Safety Administration
US Department of Transportation · March 2026
FMCSA regulates commercial vehicles entering the US. Canadian carriers need USDOT numbers, MC authority, and compliant vehicle markings for cross-border operations.
USDOT Number Requirements — 49 CFR Part 390
US Electronic Code of Federal Regulations · March 2026
49 CFR Part 390 defines USDOT number display requirements: minimum 2-inch letters, contrasting colour, on both sides of the power unit.
CBSA — Canada Border Services Agency Commercial
CBSA · March 2026
CBSA commercial regulations for cross-border trucking. Covers pre-arrival manifests, customs bonds, and documentation requirements.
All sources are official government publications or recognized industry authorities. Links verified March 2026. If you find a broken link, let us know.
Get Compliant
Order Your Cross-Border Compliance Compliance Marking
Fast turnaround production. 5+ year outdoor vinyl. Ships Canada-wide.
Shop USDOT DecalsOr call (289) 228-7021Regulation Quick Facts
- Regulation
- 49 CFR 390.21
- Jurisdiction
- 🇨🇦 Canada
- Category
- Cross-Border Compliance
What if 49 CFR 390.21 changes next year?
Laws change. When they do, your decal becomes non-compliant overnight. Annual Compliance Plan monitors 150+ Canadian regulations weekly — the moment text changes, a replacement ships to you at $0.
- Free replacement decals when laws change
- 52× weekly statute scans all year
- Digital Compliance Vault for inspections
- Smart Decal QR verification
Compliance Certificate
Every order includes a printable Certificate of Material Compliance — ready for MTO, Transport Canada, or fire marshal inspection.
View sample certificate →