Drug and Alcohol Clearinghouse Requirements
What this domain tests
The FMCSA Drug and Alcohol Clearinghouse is a federal database of CDL driver violations. The exam tests registration, employer queries, driver consent, reporting, and the return-to-duty (RTD) process for school bus drivers.
Core rules
- Under 49 CFR Part 382 Subpart G, employers must register and query the Clearinghouse before hiring a CDL driver (full query) and at least once a year (limited query).
- A full query requires the driver's electronic consent in the Clearinghouse. A limited query can use standing consent, but a positive result requires a full query.
- Violations include alcohol at 0.04 or higher, refusal to test, drug positives, and employer actual knowledge.
- A driver with an unresolved violation is prohibited from safety-sensitive functions, including driving a school bus, until completing SAP evaluation, education or treatment, and a negative RTD test.
- School districts and private school bus contractors are employers under the rule when they employ CDL drivers. Louisiana must downgrade or deny a CDL for a prohibited driver.
Worked example
A contractor wants to hire a driver. The driver registers and consents. The full query shows a 2023 drug violation with no RTD completion. The contractor cannot let the driver operate a school bus. The driver must complete the SAP process, and the employer must report the negative RTD test before the prohibition is removed.
Traps
Using only the annual limited query for pre-employment; querying without consent; assuming the Clearinghouse applies only to interstate carriers; forgetting that school bus contractors are covered; and treating a returned test as automatic reinstatement without the SAP/RTD steps.