The Driver Qualification File, and what goes into it
When you apply to drive for a new carrier, several separate checks get pulled together into what's called a Driver Qualification File (DQF) — the record every carrier is required to build under 49 CFR Part 391 before letting you operate a commercial motor vehicle.
The core areas a DQF covers include: your completed employment application, your CDL and medical certification status, your Motor Vehicle Record (MVR) from every state you've held a license in, your prior employment and safety performance history, and your pre-employment drug test result. Many carriers also review your PSP report and run a Clearinghouse query as part of the same process.
Every one of these checks is grounded in a specific federal requirement — carriers aren't guessing at what to ask for, and neither should you have to guess at what's coming.
Your application lists 10 years — but only 3 years actually gets verified
This is one of the most misunderstood rules in trucking. Your employment application is required to list 10 years of work history (49 CFR 391.21), which leads many drivers to assume carriers verify a full decade of prior employment. They don't. Carriers are only required to actually contact and verify your safety performance history with DOT-regulated employers for the preceding 3 years (49 CFR 391.23(d)) — not 10.
The second thing worth understanding clearly: meeting every federal requirement doesn't guarantee approval with any specific carrier. FMCSA sets the floor — the minimum every carrier must check. Individual carriers are free to set their own standards above that floor, like a higher minimum age, more recent experience, or a stricter accident and violation threshold. Clearing the federal minimum means you meet the baseline every carrier has to apply — it does not mean every carrier will say yes.
What gets checked, and how far back it goes
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Employment history: list 10 years, verify 3. Your application covers 10 years, but carriers are only required to contact and verify safety performance history with prior DOT-regulated employers for the preceding 3 years.
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Since January 6, 2023, carriers can satisfy the drug/alcohol history portion of this check through a Clearinghouse query for prior FMCSA-regulated employers, instead of contacting them directly. They must still directly contact prior employers for accident history, and for any non-FMCSA DOT employer (like a railroad, transit agency, or airline), since those aren't covered by the Clearinghouse.
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MVR checks cover every state you held a license in during the preceding 3 years, requested within 30 days of your start date and reviewed again every 12 months after that.
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Medical status is confirmed through your current Medical Examiner's Certificate from an examiner listed on FMCSA's National Registry (see our DOT Physical guide for details).
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"Good faith effort" is the standard for contacting prior employers — there's no fixed number of attempts required. If a prior employer never responds, that gets documented instead, not treated as a violation on your end.
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Many carriers also pull your PSP report and run a Clearinghouse query as part of the same hiring process, both before hiring and again annually.
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Carrier-specific requirements sit on top of the federal floor. Minimum age above 21, minimum months of recent experience, and stricter accident thresholds are set by each carrier individually — not by FMCSA.
Go straight to the source
These links go directly to FMCSA and official U.S. government resources. Clear To Roll does not operate, control, or maintain any of these websites.