No person who drives a commercial motor vehicle may have more than one driver's license.
RCW 46.25.020
One license limit.
Known as the Uniform Commercial Driver's License Act
The act spans §§ 46–46 (29 sections).
1989 c 178 s 4.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.