The FMCSA Commercial Driver's License Drug and Alcohol Clearinghouse has been live since January 2020, and it changed how drug and alcohol violations follow a driver. A positive test or a refusal no longer disappears when a driver moves to a new carrier. It stays in a national database for at least five years, and longer if the driver hasn't finished the return-to-duty process. For carriers, that means two things: you can see a driver's violation history before you hire them, and FMCSA can see whether you checked.
This is a practical checklist, not legal advice. The rules live in 49 CFR Part 382, and your drug and alcohol program administrator or attorney should confirm how they apply to your operation.
Who the Clearinghouse applies to
The Clearinghouse covers drivers who need a commercial driver's license or commercial learner's permit to operate a commercial motor vehicle on public roads and who are subject to DOT drug and alcohol testing under Part 382. If you employ even one of those drivers, including yourself if you're an owner-operator, you're an employer with Clearinghouse duties.
1. Register and set up your account
Every employer needs a Clearinghouse account, and queries are run through it. A few setup items trip up new carriers:
- Buy a query plan before you need it. Queries draw from a plan purchased in the Clearinghouse, so an empty plan can hold up a pre-employment check on the day you want to hire.
- Owner-operators must designate a C/TPA. If you employ yourself, you need a consortium/third-party administrator named in the Clearinghouse to handle reporting for you.
- Decide who acts for the company. Employers can assign assistants or a C/TPA to run queries and reports. Make sure someone is clearly responsible, and remove access when that person leaves.
2. Run a pre-employment full query before the driver drives
Before a driver performs any safety-sensitive function for you, you must run a full query. A full query shows the details of any violations on record, and it requires the driver's electronic consent inside the Clearinghouse. That means the driver has to register an account too, so build that step into your hiring checklist instead of discovering it on day one.
The rule that catches carriers: the result has to come back clear before the driver takes a truck out. A driver who starts hauling freight while the consent request is still pending is a violation, even if the result later comes back clean.
Since January 2023, the Clearinghouse holds a full three years of violation history, so a pre-employment full query covers the three-year drug and alcohol history check for FMCSA-regulated employers. If the driver previously worked for an employer regulated by a different DOT agency, you still need to request that history from the previous employer directly.
3. Query every driver at least once a year
Every driver you employ needs a query at least once a year. Most carriers use a limited query for this. A limited query only tells you whether information exists about the driver, not what it is, and it requires a general written consent from the driver. That consent can cover more than one year.
If a limited query shows that information exists, you have 24 hours to run a full query with the driver's electronic consent. Until that full query is done and comes back clear, the driver can't perform safety-sensitive functions.
A simple way to never miss one: run annual queries for the whole fleet in the same month each year, and include every driver hired since the last round, rather than tracking a different anniversary for each driver.
4. Report violations on time
Reporting is where honest mistakes become audit findings. Employers must report certain information by the close of the third business day after they learn of it, including:
- An alcohol confirmation test with an alcohol concentration of 0.04 or higher.
- A refusal to test that the employer determines, such as failing to show up for a test or leaving the collection site before it's finished.
- "Actual knowledge" of prohibited drug or alcohol use, such as a supervisor seeing a driver drinking on duty, or a driver's admission of use (with limited exceptions for voluntary self-identification programs).
- A negative return-to-duty test result, and the date the driver completes follow-up testing.
Medical review officers report verified positive drug tests and certain drug-test refusals, and substance abuse professionals report their assessments. Your company still owns the process, though. Make sure your MRO, SAP and C/TPA are set up to report, and keep a record of what was reported and when.
5. Keep prohibited drivers out of the truck
A driver with a drug or alcohol violation is in prohibited status until they complete the return-to-duty process: an evaluation by a substance abuse professional, any education or treatment the SAP requires, and a negative return-to-duty test. After returning to work, the driver still has to complete the follow-up testing the SAP prescribed. You cannot let a prohibited driver perform safety-sensitive functions.
Since November 2024, the second phase of the Clearinghouse rule, known as Clearinghouse-II, also requires state licensing agencies to remove the commercial driving privilege from the license of a driver in prohibited status. In practice, that driver's CDL is downgraded until they complete return-to-duty. A prohibited driver you keep on the road isn't just a Clearinghouse violation. They may not be licensed to drive a CMV at all.
6. Keep the paperwork that proves it
Queries and reports live in the Clearinghouse, but the records that prove you followed the rules live with you. Keep each driver's consent for limited queries and your query records for at least three years, and file them with the rest of the driver's qualification and testing records. When an auditor asks how you knew a driver was clear on their first day, the answer should be a dated query result, not a memory.
The audit findings that show up most often
Across carriers of every size, the same gaps come up again and again:
- No annual query for one or more drivers, often a driver hired mid-year who was left out of the fleet's query month.
- A driver who started work before the pre-employment full query was completed.
- Missing or expired consent forms for limited queries.
- An owner-operator who never designated a C/TPA.
- A refusal or an "actual knowledge" violation that was handled internally but never reported.
- A driver returned to duty before the Clearinghouse showed the return-to-duty test as complete.
Every one of these is a records problem. The carriers that pass cleanly track each driver's last query date, consent status and testing history in one place, with reminders before anything comes due.
Clearinghouse compliance: quick answers
How often do I have to query a driver in the Clearinghouse? Before they perform safety-sensitive functions for you (a full query), and then at least once a year for as long as they work for you. A limited query is enough for the annual check unless it shows that information exists.
What's the difference between a limited query and a full query? A limited query only shows whether information exists and needs a general written consent. A full query shows the violation details and needs the driver's electronic consent in the Clearinghouse. Pre-employment checks always require a full query.
What happens if a limited query shows information? You must run a full query within 24 hours. Until it's done and comes back clear, the driver can't perform safety-sensitive functions.
Can a driver in prohibited status drive for another carrier? No. Prohibited status follows the driver, and under Clearinghouse-II their state removes the CDL privilege until the return-to-duty process is complete.
Is this legal advice? No. This is a general overview of 49 CFR Part 382 and the Clearinghouse. For decisions about a specific driver or test result, talk to your drug and alcohol program administrator, medical review officer or attorney.
