Clearinghouse Queries Explained: Pre-Employment, Annual, Limited and Full

The FMCSA Drug & Alcohol Clearinghouse is a federal database of drug and alcohol program violations by CDL drivers — positive tests, refusals, and actual-knowledge violations — along with their return-to-duty progress. If you employ CDL drivers, you're required to check it. The rules are found in 49 CFR 382.701, and they're easy to get wrong in one specific way: the annual query.

Two kinds of query

A limited query tells you only whether the Clearinghouse has any information about the driver. It doesn't show what. It requires the driver's general consent, which you collect outside the Clearinghouse (on paper or electronically) and which can cover multiple years.

A full query shows the actual violation records. It requires the driver to log in to the Clearinghouse and give electronic consent for that specific query.

When you have to query

Before hiring: a full query

Before a driver performs any safety-sensitive function for you for the first time, you must run a full query. If the driver is in prohibited status — a violation without a completed return-to-duty process — they can't drive for you.

Because the Clearinghouse now holds more than three years of violation history, FMCSA-regulated employers no longer have to separately request drug and alcohol violation information from a driver's previous FMCSA-regulated employers — the full query covers it. (You still need the general safety performance history inquiry in the driver qualification file.)

Every year: at least a limited query

At least once every 12 months, you must query the Clearinghouse for every CDL driver you employ. A limited query satisfies this.

Where annual queries slip

The 12-month clock runs per driver. Several things push drivers past their window without anyone noticing:

• Batch dates that drift. Querying every driver in one annual batch is fine — until this year's batch runs in February instead of January. Every driver last queried in January is now past 12 months. If you batch, run it on a fixed date with margin, or track each driver's last query date.
• Running out of query credits. Queries are paid for with prepurchased plans. An empty balance doesn't stop the clock.
• Relying on a consortium/TPA without checking. Employers can designate a consortium or third-party administrator to run queries, but the obligation stays with the employer. Confirm the queries actually happened.
• Owner-operators. A single-driver company must designate a C/TPA for reporting, and still has to meet the query requirements.

What to keep on file

Keep each driver's signed limited-query consent for at least three years. The Clearinghouse itself keeps a history of the queries you (or your C/TPA) ran, which is useful evidence in an audit — but you need to be able to produce consent records on request.

Prohibited status now follows the license

Since November 2024, state licensing agencies must act on Clearinghouse information: a driver in prohibited status loses the commercial privileges on their license until they complete the return-to-duty process. That makes it harder for a prohibited driver to slip through — but it doesn't replace your query obligation. The employer rules haven't changed.

Make the date someone's job

Every compliant program comes down to one owner who knows each driver's next query date and acts before it passes. TruckComply tracks drug and alcohol testing alongside the rest of each driver's file so those dates don't live in a spreadsheet nobody opens.