Despite the federal reclassification of marijuana from Schedule I to Schedule III, nothing has changed for your drivers. Here’s what matters:
Testing rules are unchanged
The DOT’s zero-tolerance cannabis policy remains fully in effect. Marijuana is named explicitly in 49 CFR Part 40 — not referenced by its federal schedule — so reclassification has no impact on testing requirements.
Medical marijuana is not a valid excuse – Period
Medical Review Officers are prohibited from overturning a positive test based on a state-issued medical marijuana card, a physician’s recommendation, or a dispensary receipt. None of these meet federal compliance standards.
The numbers are significant
Marijuana accounts for roughly 60% of all positive drug tests among commercial drivers, making it the most common compliance risk you’re managing.
A new highway bill could change testing procedures
The draft legislation includes several updates to watch:
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Hair samples would become an approved specimen type alongside urine
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Post-accident drug and alcohol test records must be retained for a minimum of 5 years
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Failure to produce post-accident testing records automatically counts as a violation and feeds into CSA scores
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Up to $24 million annually through FY 2031 is authorized for roadside impairment testing research
Bottom line for fleet managers
Enforce your current drug testing policies as written. State marijuana laws and federal rescheduling provide no cover for drivers in safety-sensitive roles.
