Wash. Rev. Code § 70A.555.060
(1) Each battery stewardship organization must ensure adequate funding is available to fully implement approved battery stewardship plans, including the implementation of aspects of the plan addressing:
(2) A battery stewardship organization implementing a battery stewardship plan on behalf of producers must develop, and continually improve over the years of program implementation, a system to collect charges from participating producers to cover the costs of plan implementation in an environmentally sound and socially just manner that encourages the use of design attributes that reduce the environmental impacts of covered batteries, such as through the use of eco-modulated fees. Examples of fee structures that meet the requirements of this subsection include using eco-modulated fees to:
(3)
(4)
[ 2023 c 434 s 7.]