Washington Revised Code Title 64. Real Property and Conveyances § 64.90.450. Quorum

(1) Unless the organizational documents provide otherwise, a quorum is present throughout any meeting of the unit owners if at the beginning of the meeting persons entitled to cast 20 percent of the votes in the association attend in person, by proxy, by means of communication under RCW 64.90.445(1) (e) or (f), or have voted by absentee ballot.

(2) Unless the organizational documents specify a larger number, a quorum of the board is present for purposes of determining the validity of any action taken at a meeting of the board only if individuals entitled to cast a majority of the votes on that board are present at the time a vote regarding that action is taken. If a quorum is present when a vote is taken, the affirmative vote of a majority of the board members present is the act of the board unless a greater vote is required by the organizational documents.