RCW 46.61.502 Driving while under influence of intoxicating liquor or drug—What constitutes
A person is guilty of driving while under the influence of intoxicating liquor or any drug if he drives a vehicle within this state while: (1) He has 0.10 percent or more by weight of alcohol in his blood as shown by chemical analysis of his breath, blood or other bodily substance made under RCW 46.61.506 as now or hereafter amended; or (2) He is under the influence of or affected by intoxicating liquor or any drug; or (3) He is under the combined influence of or affected by intoxicating liquor and any drug. The fact that any person charged with a violation of this section is or has been entitled to use such drug under the laws of this state shall not constitute a defense against any charge of violating this section.
Looking for more information? Check out these articles:
Lamps and other Equipment
Clinging to Vehicles
Riding on Bicycles
Riding on Roadways and Bicycle Paths
Traffic Laws apply to Persons Riding Bicycles
Effects of Regulations
Definition of "Vehicle"
Definition of "Roadway"
Definition of "Highway"
Definition of "Hours of Darkness"
Definition of "Bicycle"