FMCSA Drug Out-of-Service Loophole Set to Close

What happened

The FMCSA drug out-of-service loophole is about to get a closer look. The Federal Motor Carrier Safety Administration (FMCSA, the federal agency that writes the safety rules for trucks) says it will start a rulemaking. A rulemaking is the formal process an agency uses to write or change a rule.

The rule in question is 49 CFR 392.4. That is the federal rule about drugs and other substances for commercial drivers. FMCSA wants to add wording that already exists in the alcohol rules. That wording says, in plain terms, that a driver may not drive while an out-of-service order is in effect.

The change would set an immediate 24-hour out-of-service period for drug-possession violations. It would also say clearly that the driver cannot operate during those 24 hours.

FMCSA granted a petition from the Commercial Vehicle Safety Alliance (CVSA, the group of roadside inspectors from the US, Canada and Mexico) on Sept. 17, 2026. Transport Topics reported the news on Sept. 25.

Why there is a loophole today

Right now, an officer who finds drugs takes them and puts the driver out of service. The problem comes if that same driver gets stopped again during that time. At the second stop there are no drugs left to find. So there is no new violation, and officers cannot enforce the first order.

The alcohol rules do not have this gap. They say plainly that a driver may not drive during a 24-hour out-of-service period. That lets officers act at a later stop too.

The Alabama Law Enforcement Agency found this gap during roadside work. FMCSA Administrator Derek Barrs said the petition was strong enough to start a rulemaking. He also said opening a rulemaking does not guarantee the rule will change.

What it means for owner-operators

If you run clean, this change should not touch you. It is aimed at drivers who keep driving after being placed out of service.

But it is a good reminder of how roadside inspections work. An out-of-service order means the truck or the driver stops. Driving before it is cleared can bring big fines and hurt your safety record. A bad record can bring more inspections and trouble with shippers and brokers.

For small carriers with a few drivers, it also matters who drives your truck. One driver with a drug violation can put your whole authority under the spotlight. Your drug and alcohol testing program, and your checks in the Drug and Alcohol Clearinghouse (the FMCSA database of drug and alcohol violations), are your first line of defense.

What to do next

• Do not drive during any out-of-service period, for any reason. Wait until it is cleared.
• Keep your drug and alcohol testing program current, including pre-employment tests and Clearinghouse queries.
• Know that FMCSA has only agreed to start the process. No new rule text has been published yet. Watch for a proposed rule, when the public can send comments.
• If you are a new carrier, get your file ready before your audit. Our new entrant safety audit guide explains what inspectors look for, and our trucking filing guide covers the paperwork to keep your authority in order.

Need help keeping your USDOT file and filings clean? Call TCZ Permits at 956-526-6727.