DOT Maintained Marijuana Testing Rules After Rescheduling
Federal marijuana policy changes do not affect drug testing requirements for safety-sensitive transportation roles.
Updated on Sept. 28, 2026 in Substance Abuse
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The Department of Transportation has confirmed that recent federal marijuana rescheduling has not altered workplace drug testing protocols for transportation employees. A positive test remains a violation, even if an individual has state-authorized medical marijuana access.
Why it matters
The clarification ensures that the 6.5 million employees covered by federal drug-testing rules understand that state-level legalization does not supersede federal safety standards. Because state-dispensed marijuana lacks FDA approval, it remains unauthorized for those in safety-sensitive positions.
Official guidance confirms that 6.5 million transportation workers remain subject to the Omnibus Transportation Employee Testing Act of 1991. The impact of rescheduling specific marijuana products to Schedule III on federal workplace testing policy remains restricted by existing statutory mandates.
The players
Department of Transportation
The federal agency responsible for national transportation infrastructure and the enforcement of safety-sensitive workplace drug-testing regulations.
Drug Enforcement Administration
The federal law enforcement agency tasked with managing the scheduling of controlled substances and enforcing the Controlled Substances Act.
Federal Motor Carrier Safety Administration
The agency responsible for regulating the commercial motor vehicle industry and overseeing the safety of professional drivers.
President of the United States
The current President of the United States who issued the 2025 Executive Order regarding federal marijuana rescheduling.
The details
The Department of Transportation maintains its authority to prohibit marijuana use under the Omnibus Transportation Employee Testing Act of 1991. Medical Review Officers are mandated to verify positive tests as violations because state-authorized medical marijuana is not a legitimate medical explanation under the Controlled Substances Act, as it lacks federal FDA approval.
Timeline
1991: Omnibus Transportation Employee Testing Act became law.
December 2025: President Trump signed an Executive Order on rescheduling.
April 28, 2026: DEA final rule moved specific marijuana products to Schedule III.
June 29, 2026: Formal hearings on broader rescheduling began.
July 15, 2026: Formal hearings on broader rescheduling ended.
Health Landscape
Federal workplace safety requirements operate independently of shifting drug scheduling status under the Controlled Substances Act. This regulatory framework follows the mandates established by the Omnibus Transportation Employee Testing Act of 1991.
Safety-sensitive employees should recognize that state-issued medical marijuana documentation does not exempt them from federal testing requirements. If you have questions regarding medication and occupational health, discuss your specific role requirements with your physician or HR department.
The takeaway
Federal rescheduling does not override existing workplace safety laws for the millions of Americans in safety-sensitive transportation roles. Always confirm with your employer or HR representative how current federal regulations apply to your specific job category.
Further reading
Learn more about the intersection of federal law and workplace regulations in our Substance Abuse section.
Source note: This article includes information reported by Forbes.
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