What 391.49JCOMPLY means in plain language
When you obtained your Commercial Driver License (CDL), you passed a skills performance evaluation—a practical test that demonstrated you could safely operate a commercial motor vehicle. That evaluation documented specific requirements and restrictions tailored to your qualifications and the type of vehicle you're authorized to drive.
FMCSR 391.49JCOMPLY requires that whenever you operate a commercial motor vehicle, you must comply with all the requirements that were documented in your skills performance evaluation. This might include restrictions on the types of vehicles you can drive, the routes you can take, or specific operating conditions under which you're qualified. Operating outside those boundaries—whether you're driving a vehicle class you weren't tested in, towing trailers you weren't evaluated for, or ignoring documented medical or skill limitations—violates this regulation.
The violation is straightforward: the federal government requires your actual operation to match what your evaluation record says you're qualified to do. When an inspector discovers a mismatch, it becomes a citation.
What our enforcement data actually shows
Across our 13 million+ inspection records, 391.49JCOMPLY remains extremely rare. We have documented only 8 all-time citations for this violation, with 1 citation in the last 12 months and 0 citations in the last 90 days. This places it at rank #2269 out of 3,036 FMCSR codes by citation volume.
What makes this violation notable is its severity when it does occur. Our data shows a 100.0% out-of-service rate for 391.49JCOMPLY—every single citation resulted in the driver being placed out of service. This is dramatically higher than the all-FMCSA average out-of-service rate of 31.4%. When inspectors cite this code, they're removing drivers from the road without exception.
The rarity of enforcement combined with the 100% OOS rate suggests that this violation is taken very seriously when discovered, likely because it represents a fundamental mismatch between a driver's qualifications and their current operation.
Who gets cited most
Our enforcement records show that in the last 180 days, Iowa recorded 1 citation for 391.49JCOMPLY, with a 100.0% out-of-service rate. Because citation volume for this code is so low nationwide, meaningful state-by-state comparison is limited. The violation is not concentrated in any particular geography; instead, it appears sporadically across the country.
Looking at all-time carrier data, we see this violation distributed across eight different carriers, each with a single citation. This pattern indicates that 391.49JCOMPLY violations are not a fleet-wide compliance issue but isolated incidents. No carrier shows a pattern of repeated citations for this specific violation.
How severe is this compared to similar codes
Within the Driver Fitness category, 391.49JCOMPLY sits at the far end of the citation rarity spectrum. For comparison:
CDL Class Mismatch (383.23(a)(2)) accounts for 50,385 citations with a 98.4% out-of-service rate. This is far more common—over 6,000 times more frequent than 391.49JCOMPLY—and equally likely to result in immediate removal from service.
Medical Certificate violations (391.41APC) generated 49,539 citations with a 97.1% out-of-service rate, again substantially more common and nearly as severe.
Operating without a valid CDL (383.23A2-LCDLN) represents 47,123 citations at 98.6% OOS rate—the most serious class of qualification violations.
By contrast, general physical qualification violations (391.41(a)) appear 42,270 times but carry only a 16.2% out-of-service rate, suggesting they are often non-critical findings. The gap between 391.49JCOMPLY's 100% OOS rate and this 16.2% rate shows that skill evaluation compliance is treated as a harder line than general fitness assessments.
How to avoid it
Preventing a 391.49JCOMPLY citation comes down to knowing your qualifications and operating strictly within them:
-
Review your CDL and evaluation records before every shift. Your CDL document or your state's records contain your restriction codes and any limitations. If you're unsure what a restriction means, contact your carrier's safety or driver compliance department before operating the vehicle.
-
Never operate a vehicle class or configuration you weren't evaluated for. If your skills evaluation was performed in a 53-foot dry van but you're asked to haul doubles or operate a tanker, that's outside your documented qualifications. Push back and request proper training or evaluation if your role is changing.
-
Confirm vehicle specifications match your authorization. Trailers, hitch types, and auxiliary equipment can all fall under the scope of your evaluation. If the assigned vehicle differs from what you were tested in, verify with your dispatcher or safety manager that the change doesn't violate your restrictions.
-
If you have medical restrictions or conditional authorizations, honor them. Some drivers are evaluated under specific conditions—night-driving limitations, passenger restrictions, or regional boundaries. Operating outside those conditions is a violation waiting to be cited.
-
Request updated evaluation if your role expands. If your carrier wants you to drive a different class, operate in a new geographic area, or handle new cargo types, request a formal skills evaluation rather than assuming your existing credentials cover it.
Our data shows this violation is rare precisely because most drivers operate within their documented qualifications. The 100% out-of-service rate when it does occur reflects that inspectors treat it as a disqualifying issue. Staying in bounds is straightforward and avoids this entirely preventable violation.