What the file must contain
Under 49 CFR 391.51, each driver's qualification file must include the employment application from 391.21, the motor vehicle record obtained before hire under 391.23, the certificate of the road test from 391.31 or an accepted equivalent, the annual MVR from the required yearly inquiry, a note on the annual review of the driving record, the list of motor vehicle violations from 391.27, the current medical examiner's certificate under 391.43, and any medical variance documentation. For CDL drivers, the medical certification status comes through the CDLIS record, and the carrier must verify the examiner is listed on the National Registry of Certified Medical Examiners.
The schedule is the system
The file is not a one-time document set. The annual MVR inquiry and the annual driving record review happen every twelve months. The medical certificate expires on the examiner's schedule, and a driver whose certificate lapses is not qualified to drive. The road test certificate and the original application stay in the file for as long as the driver is employed and for three years after. Certain records, like annual MVRs and medical certificates, may be removed three years after their execution date, but the file itself must be maintained for the employment period plus three years.
Where oilfield fleets fall short
The classic failures are the ones that show up in audits: MVRs pulled once at hire and never again, medical certificates that expire mid-hire, road test certificates missing entirely for drivers hired on referrals, and violation lists that nobody updates after a citation. In an oilfield fleet, drivers move between divisions, trucks, and supervisors, and the file moves with nobody. The result is the same: an audit finding, a driver parked, and a load delayed. The file is a compliance asset that costs an hour a quarter per driver to keep right and a full day of audit findings to neglect.
Driver qualification is back-office work with a field cost, exactly like ELD compliance and retention. The fleet that ties the file to the driver's actual schedule, hire date, certificate dates, and review cycles catches the lapse before the auditor does. If the files are binders and the reminders are post-its, an operations audit will show how many drivers are one certificate away from parked.