Notwithstanding any other provisions of this chapter or rules or procedures adopted by the authority, the authority shall make available to retired or disabled employees who are enrolled in parts A and B of medicare one or more medicare supplemental insurance policies that conform to the requirements of chapter
48.66 RCW. The policies shall be chosen in consultation with the public employees' benefits board. These policies shall be made available to retired or disabled state employees; retired or disabled school district employees; retired employees of employer groups eligible for coverage available under the authority; or surviving spouses or surviving state registered domestic partners of emergency service personnel killed in the line of duty.