A new Oklahoma law taking effect Nov. 1, 2026, will allow prosecutors to combine two or more driving under the influence violations committed by the same person within one year and prosecute them as a single Class C2 felony offense.
Senate Bill 1543, approved by Gov. Kevin Stitt in May 2026, changes how certain repeat DUI offenses can be prosecuted. The law builds on Oklahoma’s earlier changes to aggravated DUI, which took effect Nov. 1, 2025.
Key Takeaways
- Senate Bill 1543 takes effect Nov. 1, 2026, in Oklahoma.
- Prosecutors may aggregate two or more separate DUI violations committed by the same person within a one-year period into a single offense.
- A person convicted of the aggregate offense is guilty of a Class C2 felony and faces sentencing requirements under Oklahoma law.
- A separate 2025 law expanded aggravated DUI to include specific circumstances involving alcohol concentration, driving behavior, and minor passengers.
What Oklahoma’s New DUI Law Changes
Under SB 1543, multiple DUI violations committed by the same person within one year may be combined and prosecuted as one offense.
The law is meant to address occurrences in which a person was facing new DUI charges while earlier cases remained unresolved. Under the new provision, prosecutors can aggregate qualifying offenses rather than trying each violation as separate misdemeanor cases.
The statute also specifies that an aggregated charge must be filed in the county where the last violation occurred. If an aggregated charge is filed, a pending charge for an underlying violation in another county must be dismissed without prejudice.
It’s worth pointing out that the new provision does not mean that every person accused of multiple DUI violations will automatically be convicted of a felony. Prosecutors must still pursue the charge, and a conviction must follow the legal process.
How SB 1543 Fits Into Oklahoma’s Existing DUI Laws
This isn’t the first change to Oklahoma’s DUI laws. Last year, Oklahoma changed its DUI law, expanding the circumstances under which a DUI conviction qualifies as “aggravated DUI”, a Class B3 felony.
Under the version of Oklahoma’s DUI statute scheduled to take effect Nov. 1, 2026, a first DUI conviction is generally a misdemeanor, punishable by 10 days to one year in jail and a fine of up to $1,000, along with an alcohol or drug assessment and required follow-up recommendations.
A subsequent DUI within the applicable 10-year period can qualify as a Class C2 felony under the statute’s existing repeat-offense provisions. More serious repeat offenses can carry higher felony classifications and additional penalties.
SB 1543 adds another route to a Class C2 felony conviction by allowing qualifying violations within one year to be prosecuted together.
When Does the New DUI Law Start in Oklahoma?
The new law is scheduled to take effect Nov. 1, 2026. Its impact will depend on how prosecutors apply the aggregation provision and how courts handle cases involving multiple DUI violations within a one-year period.
FAQ
What is a Class C2 felony?
Class C2 is a mid-level Oklahoma felony classification that carries sentencing provisions established under state law. Class C2 covers 153 specific criminal offenses such as embezzlement, high-value property theft, grand larceny, fraud, arson, bribery, and more than 145 other offenses.
Does SB 1543 replace the aggravated DUI law?
No. The law creates a separate provision for aggregating multiple DUI violations committed within one year. The existing aggravated DUI provision continues to address a DUI conviction accompanied by specified aggravating circumstances.
Does every first-time DUI become a felony under the new law?
No. The law does not automatically turn every first-time DUI into a felony. It establishes an aggregation mechanism for multiple qualifying violations within one year.
