MT HB542

Increases minimum imprisonment for first DUI offense from 24 consecutive hours to 3 days, and from 7 days to 30 days for a second offense

Removes third DUI offense from the misdemeanor penalty structure and reclassifies it as a felony under the subsequent offenses statute

Raises felony threshold from fourth offense to third offense, with penalties including 13 months to 2 years in a correctional facility or treatment program, followed by up to 5 years in state prison and fines of $5,000-$10,000

Increases minimum prison terms for repeat felony offenders: fourth offense carries 5-10 years (up from no minimum to 10 years max), and subsequent offenses carry 7-25 years with 10 years non-suspendable

Changes the standard for suspending mandatory minimum sentences from "risk to physical or mental well-being" to situations where incarceration would cause "unreasonably burdensome costs" for the facility to provide medical care