California DMV, under federal FMCSA rules
Getting or keeping a CDL in California with a criminal record
Commercial driving is governed mostly by federal rules, not state licensing boards, and federal regulation is unusually blunt about one thing: a CDL holder's traffic convictions cannot be hidden, diverted, or masked off the record the way a non-commercial driver's ticket sometimes can.
The masking rule, in the actual federal language
Title 49 of the Code of Federal Regulations, section 384.226, states that a state must not mask, defer imposition of judgment on, or allow a CDL holder to enter a diversion program that would prevent a traffic conviction -- in any type of motor vehicle -- from appearing on the CDLIS driver record. California has to comply with this to keep federal highway funding, which is why the DMV generally cannot offer a CDL holder the traffic-school-to-dismissal option that is routine for a standard license.
What counts as a "conviction" here is broad
The federal definition (49 C.F.R. section 383.5) is wide: an unvacated finding of guilt, a plea of guilty or no contest accepted by the court, a bail forfeiture, or paying a fine -- regardless of whether the penalty was reduced, suspended, or made part of probation. That breadth is part of why the masking rule matters so much for CDL holders specifically.
Non-driving criminal convictions are a separate track
A Penal Code 1203.4 dismissal of a non-driving criminal case is a California state remedy, and the masking rule above is specifically about traffic convictions on your CDL driving record, not every criminal case you've ever had. Based on the federal definition of "conviction" -- which applies regardless of whether a penalty was later reduced or suspended -- a 1203.4 dismissal likely does not undo a traffic conviction's appearance on your CDLIS record the way it can affect other things. We have not found a government source that states this interaction in so many words; treat it as the likely reading of the rule rather than a settled answer, and get advice on your specific situation before assuming either way.
What can disqualify a CDL outright
Federal rules under 49 C.F.R. section 383.51 set disqualification periods separate from any state licensing process. A first offense for things like DUI, refusing an alcohol test, leaving the scene, using the vehicle to commit a felony, driving on a suspended license, or causing a fatality through negligent operation while driving a commercial vehicle generally carries a one-year disqualification. A felony involving a controlled substance or human trafficking, or a second conviction of one of the major offences, can mean a lifetime disqualification.
- DUI or refusal to test while operating a commercial vehicle -- generally one year, first offense
- Using a vehicle to commit a felony, including drug trafficking -- can mean lifetime disqualification
- Certain serious traffic violations within a set period
- A second conviction of a major disqualifying offence -- typically lifetime
A dismissed conviction still matters for employability
Even where a 1203.4 dismissal doesn't change your CDL driving record, it still affects how a motor carrier's criminal-history background check can treat the underlying case. The general Business and Professions Code 480(c) and 480(d) protections still apply to that broader background-check layer.
What to do before you plead to anything
Do not assume a resolution that would work for a regular license -- like traffic school -- is available to you as a CDL holder. Talk to someone who understands CDL-specific consequences before you resolve a citation, since the masking rule means a conviction you expect to disappear from your record generally will not.
A note on medical certification
CDL eligibility also runs through a separate federal medical certification process, distinct from both the masking rule and from state criminal licensing. A conviction with a substance-abuse component can trigger additional evaluation requirements under that medical program on top of everything else discussed here -- another reason this occupation is worth discussing with someone who handles CDL matters specifically, not just general criminal defense or expungement work.
Common questions
Can I go to traffic school to keep a ticket off my CDL record?
Generally no. Federal regulation 49 CFR 384.226 bars states from masking a CDL holder's traffic convictions, including through the kind of diversion program that traffic school typically provides for non-CDL drivers.
Does the masking rule apply if I was driving my personal car, not a commercial vehicle?
Generally yes -- the federal rule's language applies to a traffic conviction in any type of motor vehicle, not only while driving commercially.
If my non-driving criminal conviction was dismissed under 1203.4, does that fix my CDL record?
Likely not, since the masking rule is specifically about traffic convictions on your CDL record. A 1203.4 dismissal of an unrelated criminal case doesn't appear to change your traffic record, though this specific interaction isn't spelled out in a government source we could verify -- get advice on your situation.
What disqualifies someone from holding a CDL?
Federal rules set disqualifying offences separate from state licensing, including DUI while operating a commercial vehicle, using a vehicle to commit certain felonies, and some serious traffic violations -- some carry lifetime disqualification, especially on a second offense.
Will a dismissed criminal conviction still show up on an employer's background check for a trucking job?
It can still appear on the underlying record, but Business and Professions Code 480(c) and 480(d) protections still limit how a dismissed conviction or a no-conviction arrest can be used against you in that review.
Official source: California DMV, under federal FMCSA rules
Sources
- https://www.law.cornell.edu/cfr/text/49/384.226
- https://www.law.cornell.edu/cfr/text/49/383.51
- https://www.law.cornell.edu/cfr/text/49/383.5
- https://www.dmv.ca.gov/portal/vehicle-industry-services/occupational-licensing/commercial-driver-license-cdl/
Legal information on this page was last checked against primary sources in October 2026. California law changes; if you are reading this long after that date, confirm before you rely on it.