The bill amends Chapter 31-27 of the General Laws, focusing on motor vehicle offenses related to driving under the influence (DUI) of alcohol or drugs. It introduces new provisions that will take effect on July 1, 2025, establishing that individuals operating a vehicle while intoxicated will be guilty of a misdemeanor, with penalties based on blood alcohol concentration (BAC) levels. Key insertions include mandatory ignition interlock systems for first-time offenders, who will be prohibited from operating vehicles not equipped with these systems for a minimum of six months. The bill also removes previous language regarding the presence of controlled substances in the blood as a basis for conviction and strengthens community service and treatment requirements for offenders.

Additionally, the bill outlines specific penalties for various violations, including a tiered penalty system for refusing chemical tests, which will now be classified as a civil offense. It introduces new assessments and fees, such as a $500 highway safety assessment and a $100 fee for the ignition interlock fund. The bill emphasizes that all fines, suspensions, and treatment programs cannot be suspended, ensuring strict enforcement of penalties. Furthermore, it establishes an ignition interlock system fund to assist indigent defendants, ensuring compliance with the new requirements regardless of financial status. Overall, the bill aims to enhance public safety by imposing stricter regulations and penalties for DUI offenses.