RCW 46.37.4216
RCW 46.37.4216: Lightweight and retractable studs—Sale of tires containing.
Beginning July 1, 2001, a person may not sell a studded tire or sell a stud for installation in a tire unless the stud qualifies as a: (1) Lightweight stud under RCW 46.04.272 ; or (2) retractable stud that is exempt from the requirements of RCW 46.04.272 .