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Senate passes bill shielding fire and rescue workers who use medical cannabis after hours, amid safety debate
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Summary
The Maryland Senate passed Senate Bill 439 on March 6, protecting fire and rescue public safety employees from certain employment discrimination for off‑duty medical cannabis use after extended floor questioning about impairment standards, employer authority, and impacts on licensing. The measure passed 33–0 (constitutional majority declared).
The Maryland Senate passed Senate Bill 439 on March 6, a measure that bars certain employment discrimination against fire and rescue public safety employees who use medical cannabis off duty, after extended floor debate about how impairment would be assessed and who would have enforcement authority.
Senate Bill 439, read into the record as sponsored by Senator Jackson, was the subject of sustained questioning from several senators focused on practical and legal limits to detecting impairment. The senator from the 4th District pressed whether there is “any measurable standard to quantify” cannabis impairment and contrasted medical cannabis with prescribed opioids, saying, “Opioids are prescribed and monitored by a doctor ... this is simply a note that would allow [employees] to buy cannabis and consume it off duty.”
The floor leader and the senator from the 12th District responded that medical cannabis is provided via clinical recommendation rather than a federal prescription and noted that products are tested for THC potency. The senator from the 12th District said clinicians who recommend medical cannabis generally follow patients and that “medical cannabis ... is being tested for levels of THC” and overseen in that sense. The floor leader described the bill as limited in scope — authorizing medical use protections for firefighters while preserving an employer’s ability to act when there is evidence of impairment: “If the fireman has no valid certification … the employer can take whatever action is in the employer's policy related to cannabis use.”
Floor debate also highlighted concerns raised by the State Emergency Medical Service (MEMS) staff in informational testimony. Senators cited MEMS’ view that the bill’s phrase “impaired by cannabis” is ambiguous and could create enforcement confusion for the EMS board because the statute does not define a precise impairment standard. One senator asked whether a positive urinalysis would affect federal death benefits or the state’s death benefits for firefighters who die in the line of duty; the floor leader said he did not know and recommended those questions be explored outside the floor debate.
Several senators emphasized the bill’s policy intent: to protect off‑duty medical treatment for firefighters who often seek non‑opioid pain management and to set a statewide standard rather than a patchwork of local rules. Supporters noted local pilots (Howard County) and out‑of‑state examples as precedents for protecting medical‑use employees while maintaining safety protocols.
The bill includes a reporting provision: if a fire and rescue public safety employee reports to work while impaired by cannabis, the employer must report the incident to the State Emergency Medical Service Board. The floor leader explained that the measure prohibits certain discriminatory employment actions solely for medical cannabis use absent identified impairment.
After discussion, the clerk called the roll. The Senate recorded 33 votes in the affirmative and the presiding officer declared Senate Bill 439 passed on final reading.
Next steps: the bill now proceeds as required by the legislative process toward enrollment and any subsequent transmittal or conference requirements.

