49 CFR 391.51 Explained: Every Document FMCSA Requires in a Driver File

Section 391.51 of Title 49, Code of Federal Regulations is the FMCSA rule that tells carriers exactly what must be in every driver's qualification file. It's the section auditors reference when they open your files during a DOT audit.

The regulation itself is dense. This guide translates it into plain English — what each requirement means, where to get it, and how long you need to keep it.

What is 49 CFR 391.51?

Part 391 of the Federal Motor Carrier Safety Regulations covers Qualifications of Drivers and Longer Combination Vehicle (LCV) Driver Instructors. Section 391.51 specifically addresses the general requirements for driver qualification files — the documents a motor carrier must maintain for every driver it employs.

In simple terms: if someone drives a CMV (Commercial Motor Vehicle) for your company, you need a file on them containing specific documents. No file = violation. Incomplete file = violation.

Documents Required Under 391.51

The regulation requires the following items in every driver qualification file. Each references a specific subsection of Part 391:

1. Driver's Application for Employment (§391.21)

A completed, signed application covering the driver's employment history for the previous 3 years. Must include name, address, date of birth, SSN, nature of driving experience, and all employers for the past 3 years with contact information.

Retention: Duration of employment + 3 years after termination.

2. Motor Vehicle Record (MVR) (§391.23)

An MVR from every state where the driver held a license in the preceding 3 years. This must be obtained before the driver operates a CMV for your company. You cannot let a driver start and then "catch up" on the MVR later.

Retention: Duration of employment + 3 years.

3. Annual MVR Review & Certificate (§391.25)

Every 12 months, you must pull a fresh MVR for every driver and have a designated carrier representative review it. The reviewer must sign and certify that the driver meets minimum safe driving requirements based on the MVR findings.

Retention: Duration of employment + 3 years.

4. Road Test Certificate (§391.31) or Equivalent

A certificate showing the driver passed a road test in the type of CMV they'll be operating. A valid CDL can serve as a substitute for the road test — but you must document that the CDL is being used as the equivalent.

Retention: Duration of employment + 3 years.

5. Annual Review of Driving Record (§391.25)

Distinct from the MVR itself — this is your internal review and documented analysis of the driver's record. It's the carrier's assessment of whether the driver continues to meet qualification standards based on the MVR and any known violations.

Retention: Duration of employment + 3 years.

6. Medical Examiner's Certificate (§391.43)

Proof that the driver passed a DOT physical examination. The medical card is valid for up to 2 years (shorter if the examiner specifies medical monitoring conditions). Drivers must carry the original; you keep a copy in the DQF.

Retention: Duration of employment + 3 years. Replace with current certificate at each renewal.

7. Safety Performance History (§391.23(d)–(g))

You must request safety performance records from every DOT-regulated employer the driver worked for in the past 3 years. Previous employers have 30 days to respond. If they don't respond, you must document your good-faith efforts to obtain the records.

Retention: Duration of employment + 3 years.

8. Pre-Employment Drug & Alcohol Test Results (§391.51(b)(8))

Documentation that the driver passed a pre-employment controlled substance test. This is separate from random testing. The driver cannot operate a CMV until a verified negative result is received.

Retention: Duration of employment + 3 years (drug testing records have additional retention rules under Part 40).

9. FMCSA Clearinghouse Query (§382.701)

Before hiring, you must conduct a pre-employment full query of the FMCSA Drug & Alcohol Clearinghouse. This reveals any unresolved drug or alcohol violations. Annual limited queries are required thereafter.

Retention: Duration of employment + 3 years.

Conditional Documents (If Applicable)

These items are required only under specific circumstances:

• Medical variance or exemption — if the driver has a vision, diabetes, or seizure waiver
• ELDT certificate — required for drivers who obtained their CDL after February 7, 2022
• Hazmat endorsement documentation — if the driver hauls hazardous materials, including TSA background check clearance
• TWIC card — if the driver accesses secure port areas

Common 391.51 Violations Found in Audits

DOT auditors consistently find the same gaps. Here are the most common violations and their severity:

Building a Compliant File

The best practice is to organize each driver's file in the same order every time. Whether you use physical folders or digital software, consistency makes audits faster and reduces the chance of missing something.

A recommended file structure:

1. Application for Employment
2. CDL copy (front and back)
3. Medical Examiner's Certificate
4. Initial MVR(s)
5. Road Test Certificate / CDL waiver
6. Pre-employment drug test result
7. Pre-employment Clearinghouse query
8. Safety Performance History requests and responses
9. Annual MVR reviews and certifications
10. Annual Clearinghouse queries
11. Conditional documents (Hazmat, TWIC, ELDT, medical waivers)