Washington Revised Code Title 29A. Elections § 29A.12.080. Requirements for approval

(1) Secures to the voter secrecy in the act of voting;

(2) Permits the voter to vote for any person for any office and upon any measure that he or she has the right to vote for;

(3) Correctly registers all votes cast for any and all persons and for or against any and all measures;

(4) Provides that a vote for more than one candidate cannot be cast by one single operation of the voting device or vote tally system except when voting for president and vice president of the United States; and

(5) Except for functions or capabilities unique to this state, has been tested and certified by an independent testing authority designated by the United States election assistance commission.