RCW 35.21.165
RCW 35.21.165: Driving while under the influence of liquor or drug—Minimum penalties.
Except as limited by the maximum penalties authorized by law, no city or town may establish a penalty for an act that constitutes the crime of driving while under the influence of intoxicating liquor or any drug, as provided in RCW 46.61.502 , or the crime of being in actual physical control of a motor vehicle while under the influence of intoxicating liquor or any drug, as provided in RCW 46.61.504 , that is less than the penalties prescribed for those crimes in RCW 46.61.5055 .