FMCSA Drug & Alcohol Clearinghouse: Prohibited Status and Return to Duty

The FMCSA Drug and Alcohol Clearinghouse is a federal database that tracks drug and alcohol program violations for every commercial driver in the United States. Employers must check it before hiring a driver and at least once a year for every driver on their payroll. A driver with a reported violation is placed in “prohibited” status and cannot legally operate a commercial vehicle until completing a structured return-to-duty process. Since November 2024, prohibited status also triggers a downgrade of the driver’s commercial license at the state level, making the consequences far more immediate than when the system launched in January 2020.¹

What Puts a Driver in Prohibited Status

Four categories of violation land in the Clearinghouse and place a driver in prohibited status:²

A verified positive, adulterated, or substituted controlled substances test.
A confirmed alcohol test at a concentration of 0.04 or greater.³
A test refusal, including failing to appear, leaving before a sample is given, or otherwise refusing a required test. Refusal carries the same weight as a positive result.
Actual knowledge violations, where an employer reports firsthand knowledge that a driver used a controlled substance or used alcohol on duty, within the pre-duty window, or after an accident before testing was complete.

Once a violation is entered, the driver is immediately barred from performing any safety-sensitive function. Every employer who runs a full query sees the prohibition, so moving to a new carrier does not clear it.

What Prohibited Status Now Costs a Driver

Before November 2024, prohibited status meant a driver could not legally work, but the CDL itself remained valid. Some drivers kept operating anyway. The Clearinghouse II rule closed that gap.⁴

As of November 18, 2024, state driver licensing agencies must remove commercial driving privileges from any driver in prohibited status. The CDL or CLP is downgraded until the driver’s Clearinghouse status changes to “not prohibited.”⁵ States have 60 days from receiving the FMCSA notification to process the downgrade.⁶ Getting the license back requires completing the return-to-duty process first, then working through the state’s relicensing steps.

Employers face their own exposure. Allowing a prohibited driver to keep operating carries civil penalties of up to $19,246 per violation under the current inflation-adjusted schedule, applied per occurrence.⁷ An audit that uncovers months of ignored prohibited status can stack those penalties into serious money.

Employer Query Obligations

Employers run two types of searches, and confusing them creates compliance problems.

A limited query tells the employer only whether any violation information exists for the driver. It does not reveal what the violation was or when it occurred. Employers must run a limited query at least once every twelve months for each driver currently performing safety-sensitive work. Consent for a limited query is handled on paper outside the Clearinghouse, and a single form can cover a multi-year window if it says so.⁸ The signed consent has to be kept on file for at least three years.

If a limited query comes back showing that information exists, the employer must either run a full query within 24 hours or immediately remove the driver from safety-sensitive duties.⁹ There is no grace period. Letting the driver keep driving while the paperwork sorts itself out is itself a violation.

A full query pulls the driver’s complete violation history, including test dates, substances, and the status of any return-to-duty process. Full queries require the driver to grant electronic consent through the Clearinghouse portal, so the driver must have an active Clearinghouse account. If a driver has not registered, hiring stalls until they do.⁸

A full query is required before any new hire performs safety-sensitive work. Since January 6, 2023, the pre-employment Clearinghouse query has replaced the old requirement to contact a driver’s previous FMCSA-regulated employers for drug and alcohol history. Employers still need to reach out to previous employers regulated by other DOT agencies, and if a prior employer has an incomplete follow-up testing plan on file, the new employer must request it directly.¹⁰

Owner-Operators

Owner-operators face an added step. They cannot take any action in the Clearinghouse until they designate a consortium or third-party administrator (C/TPA) to manage queries and testing obligations on their behalf.¹¹ Independent drivers who register without a C/TPA often discover this only when they try to run a query and cannot.

Getting Back to Duty After a Violation

Return-to-duty is a structured process. Skipping any step keeps the driver prohibited.

The first requirement is an evaluation by a qualified Substance Abuse Professional (SAP). SAPs must hold specific credentials such as licensed physician, psychologist, social worker, marriage and family therapist, employee assistance professional, or certified drug and alcohol counselor, and must complete DOT-specific qualification training and testing.¹² The SAP conducts a face-to-face evaluation, prescribes education or treatment ranging from short programs to intensive outpatient care, then re-evaluates the driver after completion and records the outcome in the Clearinghouse.

After the SAP confirms compliance, the driver must pass a return-to-duty test under direct observation.¹³ The result must be negative for drugs, or below 0.02 for alcohol. Once the employer reports the negative result, the driver’s status updates to “not prohibited.”

Returning to work is not the end of oversight. The SAP writes a follow-up testing plan requiring at least six unannounced tests during the first twelve months after the driver resumes safety-sensitive duties, and the plan can be extended for up to five years.¹² Follow-up tests are also directly observed. The record is not fully resolved until every scheduled test is completed and reported.¹⁴

The cost falls on the driver. SAP evaluations typically run several hundred dollars out of pocket, and treatment adds more. Employers are not required to pay for the process or to hold the driver’s job open.

How Long a Violation Stays Visible

Violation records remain in the Clearinghouse for five years from the date of the violation, or until the driver completes the entire return-to-duty process including all follow-up tests, whichever is longer. A driver who tests positive and never starts a return-to-duty program stays visible for at least five years. A driver who finishes the process quickly may still see the record retained for the full five-year window.

Every prospective employer running a pre-employment full query sees the violation and its resolution status during that window. Some carriers apply internal hiring rules that go beyond the federal minimum.

Fixing an Inaccurate Record

Drivers who believe their Clearinghouse record contains an error can file a petition for review, but the grounds are narrow. Petitions can address administrative mistakes such as data entry errors or duplicate reports. They can also challenge an employer’s actual knowledge report that did not comply with the reporting rules, or add evidence that an impaired-driving traffic citation did not result in a conviction. Petitions cannot be used to contest the accuracy of a drug test result or a test refusal.¹⁵

Petitions can be filed electronically through the Clearinghouse or by mail. They must include a detailed explanation and supporting evidence. A petition without evidence is dismissed.¹⁶

FMCSA issues a decision within 45 days of receiving a complete petition. If the error is currently blocking you from working, you can request expedited review, which shortens the response window to 14 days. Expedited requests require proof, such as a suspension notice or a rejected job offer, showing the record is keeping you out of safety-sensitive duties.¹⁵

1
Federal Register. Commercial Driver’s License Drug and Alcohol Clearinghouse
2
eCFR. 49 CFR 382.701 – Drug and Alcohol Clearinghouse
3
eCFR. 49 CFR 382.201 – Alcohol Concentration
4
Federal Motor Carrier Safety Administration. Clearinghouse II and CDL Downgrades – State Compliance Begins
5
Federal Motor Carrier Safety Administration. CDL Downgrades
6
Federal Motor Carrier Safety Administration. Clearinghouse-II Implementation Checklist for State Driver Licensing Agencies
7
Federal Register. Revisions to Civil Penalty Amounts, 2025
8
Federal Motor Carrier Safety Administration. What Is the Difference Between a Full and Limited Query
9
Federal Motor Carrier Safety Administration. How to Conduct a Limited Query – Employers
10
eCFR. 49 CFR 382.413 – Inquiries for Alcohol and Controlled Substances Information From Previous Employers
11
Federal Motor Carrier Safety Administration. Owner-Operator
12
eCFR. 49 CFR Part 40 Subpart O – Substance Abuse Professionals and the Return-to-Duty Process
13
eCFR. 49 CFR 40.67 – When and How a Directly Observed Collection Is Conducted
14
eCFR. 49 CFR 382.705 – Reporting to the Clearinghouse
15
eCFR. 49 CFR 382.717 – Procedures for Correcting Certain Information in the Database
16
Federal Motor Carrier Safety Administration. Submitting a Petition for Data Review