What does a per se statute establish in DUI law?

• A. A fixed blood alcohol concentration at which driving is illegal
• B. Proof of impairment regardless of BAC
• C. A standard that varies by jurisdiction and time
• D. A requirement for vehicle sobriety testing only

Answer: (A)

A per se statute sets a fixed blood alcohol concentration level that makes driving illegal when reached or exceeded, regardless of whether the driver appears impaired. This means prosecutors don’t have to prove the driver was impaired; they only need to show the BAC was at or above the legal limit while operating the vehicle. Some places do have different limits for different categories (like commercial drivers or under-21 drivers), but the key idea is a definite numeric threshold that makes DUI illegal when met or exceeded. It isn’t about proving impairment from behavior alone, nor is it about testing being required in all cases, which is separate from the per se rule.