Driving with alcohol or THC in system.
RCW 46.25.110
in effect(1) Notwithstanding any other provision of Title 46 RCW, a person may not drive, operate, or be in physical control of a commercial motor vehicle while having alcohol or THC in his or her system. (2) Law enforcement or appropriate officials shall issue an out-of-service order valid for twenty-four hours against a person who drives, operates, or is in physical control of a commercial motor vehicle while having alcohol or THC in his or her system or who refuses to take a test to determine his or her alcohol content or THC concentration as provided by RCW 46.25.120 .
(1) Notwithstanding any other provision of Title 46 RCW, a person may not drive, operate, or be in physical control of a commercial motor vehicle while having alcohol or THC in his or her system.
(2) Law enforcement or appropriate officials shall issue an out-of-service order valid for twenty-four hours against a person who drives, operates, or is in physical control of a commercial motor vehicle while having alcohol or THC in his or her system or who refuses to take a test to determine his or her alcohol content or THC concentration as provided by RCW 46.25.120 .
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=46.25&full=trueFetched: 6/29/2026