Wash. Rev. Code § 41.35.470
(3) Except as specified in subsection (4) of this section, a member shall be eligible to receive a maximum of two years service credit during a member's entire working career for those periods when a member is on an unpaid leave of absence authorized by an employer. Such credit may be obtained only if:
(4) A member who leaves the employ of an employer to enter the uniformed services of the United States shall be entitled to retirement system service credit for up to five years of military service. This subsection shall be administered in a manner consistent with the requirements of the federal uniformed services employment and reemployment rights act.
(a) The member qualifies for service credit under this subsection if:
(d) The surviving spouse or eligible child or children of a member who left the employ of an employer to enter the uniformed services of the United States and died while serving in the uniformed services may, on behalf of the deceased member, apply for retirement system service credit under this subsection up to the date of the member's death in the uniformed services. The department shall establish the deceased member's service credit if the surviving spouse or eligible child or children:
(e) A member who leaves the employ of an employer to enter the uniformed services of the United States and becomes totally incapacitated for continued employment by an employer while serving in the uniformed services is entitled to retirement system service credit under this subsection up to the date of discharge from the uniformed services if:
[ 2009 c 205 s 4; 2005 c 64 s 4; 1998 c 341 s 108.]