DOT marijuana testing authority now in legal limbo after Schedule III move

Acting Attorney General Todd Blanche signed an order April 22, effective April 23, moving two categories of marijuana from Schedule I to Schedule III of the Controlled Substances Act. The first category is FDA-approved drug products containing marijuana. The second is marijuana covered by a state-issued license to manufacture, distribute, or dispense for medical purposes — the dispensary down the road from your terminal that a driver with a state medical marijuana card can legally walk into in 40 states. Recreational marijuana remains Schedule I. Any marijuana that is neither in an FDA-approved product nor covered by a state medical marijuana license remains Schedule I. The driver who tested positive last week is still in the Clearinghouse. None of that changed.

What changed is the legal underpinning for DOT's ability to require marijuana testing at all.

Does DOT still have authority to test drivers for marijuana after rescheduling?

The foundation for DOT's mandatory testing authority flows through the Department of Health and Human Services. HHS issues the Mandatory Guidelines for Federal Workplace Drug Testing Programs. Those guidelines authorize regulated employers to test only for substances listed in Schedules I and II of the Controlled Substances Act. The Omnibus Transportation Employee Testing Act of 1991 — the statute that gives DOT its testing authority in the first place — requires DOT to follow HHS scientific and technical guidelines.

State-licensed medical marijuana is now Schedule III. HHS guidelines do not authorize testing for Schedule III substances. DOT is bound by HHS guidelines. The legal chain just broke.

What happens to the Drug and Alcohol Clearinghouse right now

Nothing happens to the Clearinghouse today. FMCSA has not issued guidance suspending marijuana testing. Carriers are still required under 49 CFR Part 382 to conduct pre-employment, random, post-accident, reasonable suspicion, return-to-duty, and follow-up drug tests that include marijuana. Drivers who test positive for marijuana are still reported to the Clearinghouse. Drivers with a prohibited Clearinghouse status are still barred from operating a commercial motor vehicle until they complete the return-to-duty process with a substance abuse professional.

The rescheduling order does not change any of that on its face. What it changes is whether DOT has statutory authority to continue requiring those tests for state-licensed medical marijuana. The order creates a gap between what DOT regulations currently require and what HHS guidelines now permit DOT to require.

The compliance question carriers face Monday morning

Carriers are in a bind. If you stop testing for marijuana, you violate 49 CFR Part 382 and risk an FMCSA safety audit finding of noncompliance. If you continue testing for marijuana, you are enforcing a regulation that may no longer have statutory authority under the Omnibus Transportation Employee Testing Act. The third-party administrators who process your consortium random tests are in the same bind. The labs that analyze the samples are in the same bind.

FMCSA has not issued an emergency rule, a notice of enforcement discretion, or a Federal Register notice addressing the gap. DOT has not issued a statement. HHS has not revised the Mandatory Guidelines. Until one of those three things happens, carriers are left enforcing a testing program that rests on a legal foundation that no longer exists for one category of marijuana.

What Brandon Wiseman at Trucksafe has been warning about

Brandon Wiseman, a transportation attorney who writes the Trucksafe blog, flagged this issue in December when the Trump executive order directing the rescheduling process dropped. Wiseman pointed out that the HHS Mandatory Guidelines explicitly limit authorized testing to Schedule I and Schedule II substances. If marijuana moves to Schedule III, DOT loses the statutory hook for mandatory testing unless HHS revises the guidelines and DOT revises Part 382 to match.

The rescheduling order that dropped April 23 is the event Wiseman warned about. The legal underpinning is now gone. Most coverage of the rescheduling action either glosses over this point or gets it wrong by assuming DOT testing authority is independent of the HHS guidelines. It is not. The Omnibus Transportation Employee Testing Act requires DOT to follow HHS scientific and technical guidelines. If HHS guidelines do not authorize testing for a substance, DOT cannot require testing for that substance under the statute.

The distinction between state-licensed medical marijuana and recreational marijuana

The rescheduling order moves only state-licensed medical marijuana to Schedule III. Recreational marijuana remains Schedule I. Any marijuana that is neither in an FDA-approved product nor covered by a state medical marijuana license remains Schedule I. The guy smoking a joint in a state where adult use is legal is still possessing a Schedule I substance under federal law.

That distinction matters for the legal analysis but does not help carriers operationally. A urine drug test does not distinguish between marijuana consumed under a state medical license and marijuana consumed recreationally. The test detects THC metabolites. It does not detect the legal status of the marijuana that produced those metabolites. A driver who tests positive for marijuana could be using state-licensed medical marijuana — now Schedule III — or recreational marijuana — still Schedule I. The carrier has no way to know which category applies without asking the driver to produce a state medical marijuana card.

Even if the driver produces a card, the carrier is still enforcing a DOT regulation that may no longer have statutory authority for the Schedule III category. The carrier is also still required under current Part 382 to report the positive test to the Clearinghouse and remove the driver from safety-sensitive functions. The rescheduling order did not change Part 382. It changed the statutory authority underlying Part 382.

What FMCSA, DOT, and HHS need to do to fix the gap

HHS needs to revise the Mandatory Guidelines for Federal Workplace Drug Testing Programs to either add Schedule III substances to the list of authorized tests or create a carve-out for marijuana. DOT needs to issue a notice of proposed rulemaking to revise 49 CFR Part 382 to align with the revised HHS guidelines. FMCSA needs to issue enforcement guidance to carriers explaining whether the agency will continue to cite noncompliance with Part 382 marijuana testing requirements during safety audits while the rulemaking process is underway.

None of those three things has happened as of April 24. The rescheduling order is effective April 23. The gap is live.

What small fleets and owner-operators should do this week

Continue following 49 CFR Part 382 as written until FMCSA issues guidance stating otherwise. Continue conducting pre-employment, random, post-accident, reasonable suspicion, return-to-duty, and follow-up drug tests that include marijuana. Continue reporting positive marijuana tests to the Clearinghouse. Continue removing drivers with prohibited Clearinghouse status from safety-sensitive functions. Document every step.

If a driver tests positive for marijuana and produces a state medical marijuana card, document that fact. Report the positive test to the Clearinghouse as required under current regulations. Do not make a unilateral decision to treat the positive test differently because the marijuana was state-licensed. Wait for FMCSA guidance.

If FMCSA issues a notice of enforcement discretion stating the agency will not cite carriers for noncompliance with marijuana testing requirements while the rulemaking process is underway, adjust your testing program at that time. Until that notice arrives, the regulation on the books is the regulation you are audited against. The legal foundation may have cracked, but the compliance obligation has not changed.