What This Guide Covers
Who the drug and alcohol testing program applies to, and how the Clearinghouse query requirement connects to it — at the level of administrative and recordkeeping responsibility, not testing science or medical review.
How This Area Fits Your Operation
49 CFR Part 382 applies to every employer of a CDL driver operating a commercial motor vehicle requiring a CDL — including a self-employed owner-operator who drives; there is no exemption for being your own employer. Clearinghouse registration and query obligations attach to the same employers, as a condition of employing or continuing to employ a CDL driver, and run on their own separate timing: a pre-employment query before a new driver is permitted to operate, and an annual query for every currently employed CDL driver thereafter — not just new hires. Random testing rates (the percentage of drivers selected annually for controlled-substance and alcohol testing) are set by DOT and can change from year to year, so a rate that was current last year should not be assumed current this year.
Records To Organize
- 01Program applicability determination for the company
- 02Written drug and alcohol policy, and proof of driver receipt
- 03Driver consent records
- 04Pre-employment query and testing process dates
- 05Clearinghouse query dates (pre-employment and annual)
- 06Random testing pool/consortium enrollment records
- 07Supervisor training records
Dates That May Require Attention
- Annual Clearinghouse query for each currently employed CDL driver
- Pre-employment Clearinghouse query before permitting a new driver to operate
- Random testing selections, on the testing consortium's own cycle
Common Administrative Mistakes
- Assuming a self-employed owner-operator is exempt from the program because there's no separate 'employer'
- Skipping the annual Clearinghouse query for existing drivers, not just new hires
- Storing test-result or Clearinghouse-response detail in general business files rather than in a controlled, limited-access location
When To Confirm The Requirement
Clearinghouse query timing, consortium enrollment mechanics and specific testing-rate percentages are set and updated by FMCSA and the Department of Transportation directly — confirm the current-year requirements at the source rather than relying on a prior year's figures.
Official Sources
Federal · Supports: Who the program applies to, including self-employed drivers
49 CFR 382.103 — Applicability — eCFRChecked 2026-09-16
Federal · Supports: Employer Clearinghouse query obligations and timing
Clearinghouse — Learn: Employers — FMCSAChecked 2026-09-16
Federal · Supports: Current annual random-testing rate percentages
Random Testing Rates — DOT Office of Drug & Alcohol Policy and ComplianceChecked 2026-09-16
DOT Serenity is an independent service and is not affiliated with, endorsed by, or operated by FMCSA, USDOT or any other government agency. Links above go directly to each agency’s own official site.
How DOT Serenity Fits
How DOT Serenity Fits
DOT Serenity organizes the administrative side of your program — policy, consent, enrollment and Clearinghouse query dates — in a schema that structurally has nowhere to put a test result, a substance name, or a Clearinghouse response. That data simply isn't collected here.
Important Boundary
DOT Serenity does not perform testing, make medical determinations, or store or evaluate drug and alcohol test results or Clearinghouse response details. Sensitive result information should never be entered into general notes or messages.