Any of the following causes may be asserted by a registered voter to challenge the right to assume office of a candidate declared elected to that office, to challenge the right of a candidate to appear on the general election ballot after a primary, or to challenge certification of the result of an election on any measure:
(1) For misconduct on the part of any election officer involved therein;
(2) Because the person whose right is being contested was not, at the time the person was declared elected, eligible to that office;
(3) Because the person whose right is being contested was, previous to the election, convicted of a felony by a court of competent jurisdiction, the conviction not having been reversed nor the person's civil rights restored after the conviction;
(4) Because the person whose right is being contested gave a bribe or reward to a voter or to an election officer for the purpose of procuring the election, or offered to do so;
(5) On account of illegal votes.
(a) Illegal votes include but are not limited to the following:
(i) More than one vote cast by a single voter;
(ii) A vote cast by a person disqualified under Article VI, section 3 of the state Constitution.
(b) Illegal votes do not include votes cast by improperly registered voters who were not properly challenged under RCW
29A.08.810 and
29A.08.820.