OK SB1543

Allows two or more separate DUI violations committed within one year to be aggregated and prosecuted as a single Class C2 felony offense, with fines up to $2,500 and imprisonment as provided under Section 20M of Title 21

Creates a new felony enhancement for subsequent DUI violations within 10 years of a prior DUI conviction, personal injury DUI accident, or DUI while transporting a child, classified as a Class C2 felony with mandatory ignition interlock device and 1-5 years imprisonment

Adds the aggregated DUI offense and subsequent DUI offense to the list of Class C2 felony offenses under Oklahoma's criminal classification system, with corresponding penalties including up to 7 years imprisonment and 20% minimum sentence served before release

Repeals three conflicting versions of Section 11-902 enacted in 2025 to consolidate DUI law provisions

Effective date of November 1, 2026