RCW 46.18.210
RCW 46.18.210: Armed forces license plates.
(1) A registered owner may apply to the department for special armed forces license plates for vehicles representing the following: (a) Air force; (b) Army; (c) Coast guard; (d) Marine corps; (e) National guard; or (f) Navy. (2) Armed forces license plates may be purchased by: (a) Active duty military personnel; (b) Families of veterans and service members; (c) Members of the national guard; (d) Reservists; or (e) Veterans, as defined in RCW 41.04.007 . (3) A person who applies for special armed forces license plates shall provide: (a) DD-214 or discharge papers if the applicant is a veteran; (b) A military identification card or retired military identification card; or (c) A declaration of fact attesting to the applicant's eligibility as required under this section. (4) For the purposes of this section: (a) "Child" includes stepchild, adopted child, foster child, grandchild, or son or daughter-in-law. (b) "Family" or "families" includes an individual's spouse, child, parent, sibling, aunt, uncle, or cousin. (c) "Parent" includes stepparent, grandparent, or in-laws. (d) "Sibling" includes brother, half brother, stepbrother, sister, half sister, stepsister, or brother or sister-in-law. (5) Armed forces license plates are not free of charge to disabled veterans, former prisoners of war, or spouses or domestic partners of deceased former prisoners of war under RCW 46.18.235 .