Wash. Rev. Code § 41.40.129
(1) An employee providing emergency medical services for a consortium of local governments, where some of those local governments qualified as public employees' retirement system employers at the time the service was rendered, may make an election to establish credit for service performed prior to July 27, 2003, as a full-time emergency medical technician serving the consortium to the public employees' retirement system. This option is only available to employees who:
(2)
(a) The department of retirement systems shall treat the consortium member with the largest current population among consortium members who qualified as a public employees' retirement system employer at the time the service was rendered as the employer for purposes of this section. This employer classification:
(b) All contributions required for past periods of service established under this section shall be paid by the employees electing to establish service credit under this section.
(3) If a member who elected to establish service credit under this section dies or retires for disability prior to payment of contributions under subsection (2)(b) of this section, the member, or in the case of death the surviving spouse or eligible minor children, may:
[ 2016 c 236 s 2.]