HB 4390 amends the Michigan Vehicle Code to expand the state’s commercial driver licensing and testing provisions to include “other bodily fluid,” expressly defining that term to include oral fluid. It also defines “preliminary oral fluid analysis” as an on-site oral fluid test performed by a certified drug recognition expert or peace officer to detect controlled substances. In practical terms, the bill updates Michigan law so that drug-impairment testing and related refusal provisions are not limited to blood, breath, or urine, but can also cover oral fluid and other bodily fluids capable of revealing controlled substances or their metabolites.
The bill also revises the rules governing suspension, revocation, and disqualification of commercial learners permits, vehicle group designations, and hazardous materials endorsements. It preserves and restates a wide range of mandatory sanctions for serious traffic violations, drug- and alcohol-related offenses, refusals to submit to chemical testing, leaving the scene of an accident, felony use of a motor vehicle, hazardous materials security risks, and certain violations involving commercial motor vehicles. The bill makes clear that some noncommercial motor vehicle offenses can still count against a commercial driver’s record, and it continues to require the Secretary of State to act on convictions, bond forfeitures, civil infractions, or equivalent findings from courts or administrative tribunals.
The bill’s impact on state law is to modernize testing terminology and expand the evidentiary tools available for detecting drug impairment under the vehicle code, while leaving the broader CDL penalty structure in place. It affects commercial drivers, CDL holders, hazardous materials endorsement holders, law enforcement, courts, and the Secretary of State by broadening the types of bodily-fluid testing that can trigger or support enforcement actions. The bill takes effect 90 days after enactment, but only if the tie-barred House Bill 4391 also becomes law.
Overall sentiment appears favorable in committee and on the House floor. The bill was reported from committee 5-0 without amendment and later passed the House 61-44 on an immediate-effect roll call, indicating substantial support but not unanimity. The vote pattern suggests the measure was viewed as a public-safety and enforcement update, though the relatively large number of no votes shows meaningful opposition.
The main point of contention is likely the expansion of testing authority to oral fluid and other bodily fluids, which may raise concerns about privacy, reliability, implementation, and the scope of police discretion in impaired-driving enforcement. The bill’s tie-bar to HB 4391 also indicates that its operation depends on companion legislation, which can be a procedural point of concern for lawmakers. Supporters appear to favor the bill as a modernization of drug-testing tools for commercial driver enforcement, while opponents likely object to the broader testing framework and its consequences for CDL holders.
HB 4390 amends the Michigan Vehicle Code, primarily sections 43b and 319b, and adds a new definition section for “other bodily fluid.” It expands the statutory framework for impaired-driving and commercial driver enforcement by recognizing oral fluid and other bodily fluids as valid testing media, and by updating related refusal and suspension provisions. The bill affects the Secretary of State’s authority to suspend, revoke, deny, or cancel commercial driving privileges and hazardous materials endorsements, and it continues to incorporate federal CDL and hazardous materials standards into state law.
The bill appears to have received generally positive treatment in the legislative process, with unanimous committee reporting and a clear House majority in favor on third reading. At the same time, the 61-44 floor vote shows that support was not universal, suggesting some legislators had reservations about the bill’s scope or policy implications. The absence of recorded committee discussion limits direct insight into the debate, but the voting history indicates a mix of public-safety support and substantive opposition.
The most notable contention is the bill’s expansion of drug-testing authority from blood, breath, and urine to oral fluid and other bodily fluids, which may be seen as broadening enforcement powers in ways some lawmakers or stakeholders consider intrusive or uncertain. Another likely point of concern is the bill’s effect on commercial drivers, since it preserves strict mandatory disqualification and revocation rules for a wide range of offenses, including refusals to test and certain noncommercial violations. The tie-bar to HB 4391 also means the bill’s effectiveness depends on companion legislation, which can be a procedural and policy concern for those who want the changes to stand alone.