Commercial Licensing
Commercial Driver License (CDL) DUI Defense: 0.04% BAC Limit & Disqualification Rules
Legal Counsel Review: Senior DUI Trial Attorney & Forensic Specialist•Published: September 2, 2026•Statutory Jurisdiction: State & Federal Courts
Commercial Driver License (CDL) holders are subject to strict federal and state regulations under FMCSA 49 CFR Part 383 and California Vehicle Code § 15300.
1. Commercial Driver DUI Thresholds
- 0.04% BAC in Commercial Vehicle: Operating a commercial motor vehicle with a BAC of strictly 0.04% or greater constitutes a DUI violation.
- Personal Vehicle Violations Trigger CDL Suspensions: Being arrested for DUI in your personal passenger vehicle (at 0.08% BAC) triggers automatic suspension of your commercial endorsements.
- Lifetime CDL Disqualification: A second DUI conviction—regardless of whether committed in a commercial or personal vehicle—results in a permanent, lifetime disqualification from commercial driving.
| Conviction Event | CDL Impact (Commercial Vehicle) | CDL Impact (Personal Vehicle) |
|---|---|---|
| 1st DUI Conviction | 1-Year CDL Disqualification (3 Years if transporting hazardous materials) | 1-Year CDL Disqualification |
| 2nd DUI Conviction | Lifetime Permanent CDL Revocation | Lifetime Permanent CDL Revocation |
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Authored & Verified by Duiattorneysonline Senior Trial Counsel
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