The law governing DUI (called ‘OVI’ in Ohio) is going to change. House Bill 37, signed by Governor Mike DeWine, becomes law on April 9, 2025. The legislation changes four separate areas of law: (1) Driving privileges and ignition interlock devices for OVI license suspensions; (2) Financial penalties for OVI convictions; (3) Oral fluid testing in OVI cases; and (4) Aggravated Vehicular Homicide penalties when a defendant has prior OVI convictions. This article addresses the changes in that order.