Wash. Const. art. IV, § 29

Notwithstanding any provision of this Constitution to the contrary, if, after the last day as provided by law for the withdrawal of declarations of candidacy has expired, only one candidate has filed for any single position of superior court judge in any county containing a population of one hundred thousand or more, no primary or election shall be held as to such position, and a certificate of election shall be issued to such candidate. If, after any contested primary for superior court judge in any county, only one candidate is entitled to have his name printed on the general election ballot for any single position, no election shall be held as to such position, and a certificate of election shall be issued to such candidate: Provided, That in the event that there is filed with the county auditor within ten days after the date of the primary, a petition indicating that a write in campaign will be conducted for such single position and signed by one hundred registered voters qualified to vote with respect of the office, then such single position shall be subject to the general election. Provisions for the contingency of the death or disqualification of a sole candidate between the last date for withdrawal and the time when the election would be held but for the provisions of this section, and such other provisions as may be deemed necessary to implement the provisions of this section, may be enacted by the legislature.