Prohibits, when annual premiums are in excess of two hundred fifty million dollars, a health care service contractor under chapter 48.44 RCW or a health maintenance organization under chapter 48.46 RCW from accumulating capital and reserves, including risk-based capital (RBC), in excess of two months of claims expense as reported on line 18 of the quarterly statement of revenue and expenses, as existing on the effective date of the act, filed with the insurance commissioner's office.