Presently (when on tour) none.
And for part 2... generally (in GA land)
2 bars - Gr 2/3 instructor or general SE charter
3 bars - Gr1 instructor or bigger charter capt (eg RFDS etc)
4 bars - CFI/CP
I remember a ferry captain on a b200 that arrived at our hangar in CNS saying in a loud texan drawl, "How come you pilots all wear three bars - you're all captains after all??".