Washington Revised Code Title 23B. Washington Business Corporation Act § 23B.08.070. Resignation of directors

(1) A director may resign at any time by delivering a written notice of resignation to the board of directors, its chairperson, the president, or the secretary of the corporation.

(2) A resignation is effective as provided in RCW 23B.01.410(9) unless the notice provides for a delayed effectiveness, including effectiveness determined upon a future event or events. A resignation that is conditioned upon failing to receive a specified vote for election as a director may provide that it is irrevocable.