Wash. Rev. Code § 70A.224.020
(1) Each local government and its local hazardous waste plan under RCW 70A.300.350 is required to include a used oil recycling element. This element shall include:
[ 2020 c 20 s 1234; 2014 c 173 s 1; 1991 c 319 s 303. Formerly RCW 70.95I.020.]