What is the legal limit for a driver under 21?

While it is illegal for an individual under the age of 21 to consume alcohol, minus a few exceptions, that does not necessarily guarantee that that individual will automatically be convicted of DUI if that individual is contacted by law enforcement while operating a vehicle. Rather, if an individual under the age of 21 is charged with DUI, the State must prove that that individual was operating or in physical control of a motor vehicle with an alcohol concentration of at least 0.02 within two hours of operating the vehicle. The State, however, may still pursue the charge of DUI if the driver’s BAC is under 0.02 if the evidence suggests that that individual was operating the vehicle under the influence of alcohol or drugs.