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Driving Under the Influence
Driving under the influence (DUI)

The following is information to assist you in understanding laws effective September 28, 2013 relating to driving under the influence of intoxicating liquor or drugs.

A police officer must arrest and take into custody, pending release on bail, personal recognizance, or court order, a person without warrant when the officer has probable cause to believe that person violated DUI or physical control (PC) laws and has a prior offense for DUI or PC within ten years.

As a condition of release from custody before arraignment or trial, a defendant who has a prior DUI, PC, vehicular homicide, or vehicular assault offense must be ordered to have a functioning ignition interlock device (IID) installed with proof filed with the court within five (5) business days of the date of release, or comply with the 24/7 sobriety monitoring program, or both. 

For approved Washington State Certified Ignition Interlock providers visit

For more information regarding IID, please contact Department of Licensing at