Clearinghouse Queries: Full, Limited and Annual

Three obligations, two kinds of query, and one deadline measured in hours. It is not complicated, but it is one of the things a safety audit checks and one that single-truck carriers routinely miss entirely.

Last reviewed: September 9, 2026 Reading time: 6 min

The two kinds of query

Full queryLimited query
What it returnsAll information held on the driverOnly whether information exists
ConsentSpecific written consent from the driverGeneral consent, which may last beyond one year
Used forPre-employment, and following a positive limited queryThe annual check

The three obligations

1. Before the driver performs safety-sensitive functions

A full query is required before you employ a driver in a safety-sensitive role. It needs the driver's specific written consent, given in the Clearinghouse itself.

2. Once every twelve months, for every driver

An annual query is required at least once a year for each driver subject to testing. It may be a limited query, which is what most carriers use because the consent can be given once and cover more than a single year.

3. Within 24 hours, if the limited query comes back positive

If a limited query indicates that information exists, you must conduct a full query within 24 hours. Until that full query is completed and shows no prohibition, the driver may not perform safety-sensitive functions.

That 24-hour clock is the part that catches people. A limited query does not tell you what the record says — only that there is one. Running the annual queries on a Friday afternoon and going home is how a carrier ends up with a driver working who should not be.

What this means for an owner-operator

If you drive under your own authority, you are both the employer and the driver. You cannot query yourself in the ordinary way, so the regulations require an owner-operator to designate a consortium or third-party administrator to carry out the Clearinghouse obligations on their behalf.

In practice this is bundled with the drug and alcohol testing consortium you already need to join, and the administrator handles the queries and reporting. What you must do is make sure it is actually set up, and keep the evidence.

Where it shows up in an audit

Clearinghouse queries sit inside the drug and alcohol testing area examined in a new entrant safety audit. Failing to implement a testing programme at all is one of the automatic-failure conditions. The evidence an auditor wants is documentary: the consortium enrolment, the query records, the consents.

A workable routine

  • Query on hiring, before the first dispatch. Not after.
  • Put every driver's annual query on the same calendar date, so it is one task a year rather than a rolling set you forget.
  • Do it on a morning, not a Friday evening, so the 24-hour rule is workable if something comes back.
  • Keep the query receipts and consents with the driver qualification file.

Frequently asked questions

What is the difference between a full and a limited query?

A full query returns the information held on the driver and requires specific written consent. A limited query only reveals whether information exists, and its consent can cover more than one year.

How often must I run an annual query?

At least once every twelve months for every driver subject to testing.

What if a limited query shows information exists?

You must run a full query within 24 hours, and the driver may not perform safety-sensitive functions until it is completed and shows no prohibition.

How does an owner-operator meet this?

By designating a consortium or third-party administrator to perform the Clearinghouse obligations, since you cannot act as your own employer for this purpose.

Related

Sources

  1. 49 CFR § 382.701 — Drug and Alcohol Clearinghouse queries.
  2. FMCSA Drug and Alcohol Clearinghouse.

General information, not legal advice. Regulations change; confirm current requirements with the agency before acting.