(a) “Member of the public” means any person, firm, association, organization, partnership, business trust, corporation, or company, and also includes any city, county, public district or agency, state or any department or agency thereof (except for the commission and members of its staff), and the United States or any department or agency thereof.

(b) “Proceeding” means any meeting, hearing, workshop, conference, or visit, of the commission or its staff, at which public attendance is required or permitted.