RCW 46.20.027: Armed forces, dependents.
A Washington state motor vehicle driver's license issued to any service member if valid and in force and effect while such person is serving in the armed forces, shall remain in full force and effect so long as such service continues unless the same is sooner suspended, canceled, or revoked for cause as provided by law and for not to exceed ninety days following the date on which the holder of such driver's license is honorably separated from service in the armed forces of the United States. A Washington state driver's license issued to the spouse or dependent child of such service member likewise remains in full force and effect if the person is residing with the service member.
For purposes of this section, "service member" means every person serving in the armed forces whose branch of service as of the date of application for the driver's license is included in the definition of veteran pursuant to RCW 41.04.007 or the person will meet the definition of veteran at the time of discharge.