MI HB4391

Expands chemical testing methods for impaired driving to include "other bodily fluid" in addition to blood, breath, and urine for determining alcohol or controlled substance presence

Authorizes peace officers to require preliminary oral fluid analysis (saliva testing) alongside preliminary breath analysis when they have reasonable cause to believe a driver is impaired

Makes results from preliminary oral fluid analysis admissible in criminal proceedings and administrative hearings for the same purposes as breath analysis results

Requires private entities performing oral fluid chemical testing to protect personally identifying information, destroy samples after analysis, prohibit DNA entry into databases, and limit database entry of test results

Refusing a preliminary oral fluid analysis carries the same penalties as refusing a preliminary breath test: civil infraction for non-commercial drivers, misdemeanor (up to 93 days imprisonment and/or $100 fine) for commercial motor vehicle operators

Takes effect 90 days after enactment, contingent on HB 4390 also being enacted into law