Driving under the influence; modifying provisions related to blood or breath alcohol concentration. Effective date.

Oklahoma's SB 1914 lowers the legal blood alcohol concentration (BAC) limit for DUI convictions from 0.08% to 0.05% for all drivers starting June 1, 2028. It removes timing requirements for administering BAC tests and updates penalties, classifying repeat offenses as felonies (Class C2 for second offenses, Class B4 for third offenses) with mandatory treatment assessments, ignition interlock devices, and longer prison terms. The bill directly affects drivers tested for BAC in Oklahoma, modifying the threshold for legal impairment and escalating consequences for repeat violations. Key changes include revised BAC limits for evidence, updated felony classifications, and removal of outdated procedural requirements across related statutes.