Washington Revised Code Title 29A. Elections § 29A.08.775. Use and maintenance of statewide list

Only voters who appear on the official statewide voter registration list are eligible to participate in elections. Each county shall maintain a copy of that county's portion of the state list. The county must ensure that voter registration data used for the production, issuance, and processing of ballots in the administration of each election are the same as the official statewide voter registration list.