Cross-Border Ontario/USDOT Dual Compliance
Regulation O.Reg 424/97 + 49 CFR 390.21 · Province of Ontario
§The Law
O.Reg 424/97 + 49 CFR 390.21 — Regulation O.Reg 424/97 + 49 CFR 390.21
“Trucks crossing the Ontario-US border must hold a valid Ontario CVOR (certificate carried in the cab) and display the USDOT number on the cab under FMCSA 49 CFR 390.21. Ontario does not mandate exterior CVOR display.”
View official regulation text✓Plain English
Cross-border trucks need a valid CVOR (Ontario — certificate kept in the cab) and a USDOT number displayed on both sides of the cab (US federal). The USDOT marking is the exterior one that is checked; CVOR is the cab certificate.
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Specific Requirements
Valid CVOR — certificate carried in the cab
USDOT number displayed on both sides — US federal
Company name on both sides (USDOT layout)
GVW or GCW rating displayed
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📚Sources & Authority
Every claim on this page is backed by official government legislation and verified industry sources. Last verified: March 2026.
🏛 Official Government Sources
Ontario Highway Traffic Act — Commercial Vehicles
Ontario.ca · March 2026
The HTA governs all commercial vehicle requirements in Ontario including CVOR registration, vehicle markings, and weight limits.
MTO CVOR Overview — Commercial Vehicle Safety
Ontario Ministry of Transportation · March 2026
CVOR registration requirements, safety rating system, and compliance monitoring for Ontario commercial vehicle operators.
🎓 Expert & Industry Sources
All sources are official government publications or recognized industry authorities. Links verified March 2026. If you find a broken link, let us know.
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Shop Trucking ComplianceOr call (289) 228-7021Regulation Quick Facts
- Regulation
- O.Reg 424/97 + 49 CFR 390.21
- Jurisdiction
- 🏛 Province of Ontario
- Category
- Commercial Trucking Law
Source library
Confirm the current rule before relying on a marking
Our guides are a starting point for locating government sources connected to O.Reg 424/97 + 49 CFR 390.21 markings. Requirements can depend on jurisdiction, vehicle or site details, and the date you act.
- Open the linked official source and check its current version.
- Confirm the rule applies to your exact vehicle, vessel, property, or operation.
- Verify wording, dimensions, placement, and effective dates before ordering.
Compliance Certificate
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