Wash. Admin. Code § 296-863-20025
(1) You must make sure order pickers have either:
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 17-18-075, § 296-863-20025, filed 9/5/17, effective 10/6/17; WSR 07-03-163, § 296-863-20025, filed 1/24/07, effective 4/1/07; WSR 04-19-051, § 296-863-20025, filed 9/14/04, effective 2/1/05.]