“Officer” and “public officer” include all officers, members and employees of:
1. The State of Nevada;
2. Any political subdivision of this state;
3. Any other special district, public corporation or quasi-public corporation of this state; and
4. Any agency, board or commission established by this state or any of its political subdivisions,
Ê and all persons exercising or assuming to exercise any of the powers or functions of a public officer.