FMCSR 397.3-SLL: State/Local Hazmat Laws — Driver Q&A

No. Across our inspection records, only 1.0% of 397.3-SLL citations result in an out-of-service order. That means 378 out of 382 all-time citations allowed the driver to continue operating. By contrast, the average FMCSR code carries a 31.4% OOS rate. This violation is typically a citation and fine rather than an immediate roadside shutdown.

It's moderate compared to other hazmat codes. Our data shows 397.3-SLL ranks much lower in severity than loading/unloading violations (99.2% OOS rate) or placarding violations (75.1% OOS rate). However, it's still a hazmat citation, which means you were transporting regulated materials in violation of local or state law. Expect a fine and points on your record, but not an automatic roadside shutdown like more serious hazmat breaches.

Immediate steps:

1. Document the citation — note the specific local law or ordinance cited and the jurisdiction.
2. Check your company's hazmat compliance — our data shows 392.2 (ill/fatigued driving) appears in 21 co-occurring violations with 397.3-SLL in the last 90 days, suggesting fatigue may compound hazmat violations.
3. Review local routing and parking rules — 397.3-SLL is about driving or parking in violation of local regs, so confirm compliant routes and stops for your next haul.
4. Contact your carrier's compliance officer immediately — they may need to flag your dispatch procedures.

Our inspection database shows 50 citations in the last 90 days and 213 in the last 12 months. Monthly enforcement has been steady, ranging from 2 to 33 citations per month over the past year. January 2026 saw the highest month with 33 citations, while April 2026 (just started) shows only 2 so far. This suggests moderate but consistent enforcement activity around hazmat local-law compliance.

California dominates by far. In the last 180 days, CA issued 87 citations for 397.3-SLL — more than 20 times the rate of the next state. West Virginia follows with 4 citations, and Nevada has 3. Colorado and Pennsylvania each had 2. If you're hauling hazmat in California, pay close attention to local parking and routing ordinances, especially in urban or regulated zones.

Possibly, depending on what the inspector actually found. 397.3-SLL is a violation of local or state law — the inspector must document which specific regulation you broke and where. If the citation is vague, lacks detail about the actual local ordinance, or the inspector cited the wrong jurisdiction's code, you have grounds to challenge it through the DataQs RDR (Roadside Data Review) process. Gather photos of signage, GPS data, and the local ordinance text to support your case.

In the last 90 days, fatigue violations (392.2) co-occur most often, appearing in 21 inspections alongside 397.3-SLL. Brake defects (393.47E) and tire pressure issues (393.75A3) also show up in 5 shared inspections each. This pattern suggests that 397.3-SLL citations often occur during inspections that turn up multiple violations. If you're cited for 397.3-SLL, expect the inspector to have conducted a thorough check for mechanical and driver condition issues as well.

Both. FMCSA's Safety Management Guidelines track violations at both the driver level (your Motor Carrier Safety Status report) and the carrier level (your company's CSA scores). A 397.3-SLL citation counts against your driving record and your carrier's hazmat safety metrics. If you're an owner-operator or work for a small fleet, both your personal and company scores will reflect this violation. Carriers like Old Dominion, KAG West Energy, and Central Transport have each accumulated multiple 397.3-SLL citations across their fleets.