(1) "Public record" includes any writing containing information relating to the conduct of government or the performance of any governmental or proprietary function prepared, owned, used, or retained by any state or local agency regardless of fiscal form or characteristic. This definition does not include records that are not otherwise required to be retained by the agency and are held by volunteers who:

(a) Do not serve in an administrative capacity;

(b) Have not been appointed by the agency to an agency board, commission, or internship; and

(c) Do not have a supervisory role or delegated agency authority.

(2) "Writing" means handwriting, typewriting, printing, photostating, photographing and every other means of recording any form of communication or representation including, but not limited to, letters, words, pictures, sounds, or symbols, or combination thereof, and all papers, maps, magnetic or paper tapes, photographic films, prints, motion pictures, film and video recordings, magnetic or punched cards, discs, drums, diskettes, sound recordings, and other documents including existing data compilation from which information may be obtained or translated.

(3) "Commission" means the Washington traffic safety commission.