Wash. Rev. Code § 70A.208.160
(2) A producer responsibility organization with an approved plan must annually collect a fee from each member producer that must:
(b) Reflect program costs for each covered materials type, net of commodity value for that covered materials type when used as a recycled material, as well as allocated fixed costs that do not vary based on covered materials type. Any membership fees charged for different covered material types, materials, and formats must:
(c) Incentivize using materials and design attributes that reduce the environmental impacts and human health impacts of covered materials by:
(ii) Reducing the amount of:
(f) Generate revenue sufficient to pay in full:
[ 2025 c 316 s 116.]