What is “per se”? “Per se” (pronounced “per say”) means by statute the facts of your case constitute a violation of the law. Under DUI laws in most any state, it means the results of the state-administered test of your blood, breath or urine yield a blood-alcohol content exceeding the state law threshold for legally operating a motor vehicle on the highway. For driver’s 21 years old and over, a driver found with a blood-alcohol concentration (“BAC”) of greater than or equal to 0.08g/L is deemed in violation of Georgia DUI laws, aka “per se” DUI. For drivers under 21 years of age, a per se DUI arises with BAC greater than or equal to .02 g/L. For Commercial Vehicle licensed Drivers, a per se DUI arises with BAC greater than or equal to 0.04g/L.