(1) Any savings generated for a health plan, as defined in RCW 48.43.005, or a health plan offered under chapter 41.05 RCW that are attributable to the establishment of an upper payment limit established by the board must be used to reduce costs to consumers, prioritizing the reduction of out-of-pocket costs for prescription drugs.

(2) By January 1, 2024, the board must establish a formula for calculating savings for the purpose of complying with this section.

(3) By March 1st of the year following the effective date of the first upper payment limit, and annually thereafter, each state agency and health carrier issuing a health plan in the state must submit a report to the board describing the savings in the previous calendar year that were attributable to upper payment limits set by the board and how the savings were used to satisfy the requirements of subsection (1) of this section.