Tennessee Code Title 4. State Government § 4-27-104

(1) LEVEL I: Governor's staff, department commissioner or equivalent;

(2) LEVEL II: Assistant or deputy commissioner, assistant to commissioner, major fiscal and administrative policy departmental staff or equivalent;

(3) LEVEL III: Director or division chief, including the full line division chief to a statewide program; includes chief of division supervising several line service units or equivalent;

(4) LEVEL IV: Assistant to director or division chief, section chief or head of major departmental function or equivalent.