WordNet sense 1 (a worker who holds or is invested with an office):

functionary

WordNet sense 2 (conforming to set usage, procedure, or discipline):

prescribed

WordNet sense 3 (brought about or set up or accepted; especially long established):

constituted, established

WordNet sense 4 (having been established or made firm or received the rite of confirmation):

confirmed

WordNet sense 5 (characteristic of or befitting a person in authority):

formal

WordNet sense 6 (sanctioned by established authority):

authoritative