"An official list of citizens to check citizenship status against does not exist. If the required information for voter registration is included – name; address; date of birth; a signature attesting to the truth of the information provided on the application; and an indication in the box confirming the individual is a U.S. citizen – the person must be added to the voter registration file. Modifying state law would require an act of the state legislature, and federal law, an act of Congress. Neither the Secretary of State nor the county auditor has lawmaking authority."

https://www.thurstoncountywa.gov/departments/auditor/electio...