If a law enforcement officer finds that a driver under 21 has a blood alcohol concentration (BAC) of 0.05% or higher, the officer will

If a driver under 21 is stopped for suspected DUI and his or her blood alcohol concentration (BAC) measures 0.05% or higher, the officer will issue the driver an order of suspension and arrest the driver for DUI. [Under 21- Zero Tolerance for Alcohol Use, Alcohol/Drugs and Driving is Dangerous, Alcohol and Drugs, California Driver Handbook]