RCW 24.03A.635: Directors and officers under 18 years of age.

No director or officer of a corporation who is under 18 years of age shall have authority to execute any document on behalf of the corporation, or otherwise to bind the corporation with respect to any other party, without the written concurrence of one or more other directors or officers of the corporation who are at least 18 years of age and would, between them, have independent authority to execute the same document or to bind the corporation in the same way.