Wash. Rev. Code § 4.24.670
(1) Except as provided in subsection (2) of this section, a volunteer of a nonprofit organization or governmental entity shall not be personally liable for harm caused by an act or omission of the volunteer on behalf of the organization or entity if:
(e) The nonprofit organization carries public liability insurance covering the organization's liability for harm caused to others for which it is directly or vicariously liable of not less than the following amounts:
(5) The definitions in this subsection apply throughout this section unless the context clearly requires otherwise.
(d) "Nonprofit organization" means:
[ 2001 c 209 s 1.]