functus officio

adjective

func·​tus of·​fi·​cio

ˈfəŋk-təs-ə-ˈfi-shē-ō, ˈfu̇ŋk-tu̇s-ȯ-ˈfē-kē-ō

: of no further official authority or legal effect

the warrant… had been returned and was functus officio

—Cady v. Dombrowski, 413 U.S. 433 (1973)

once an arbitrator makes an award she is functus officio

—used especially of an officer who is no longer in office or of an instrument that has fulfilled its purpose

Word History

Etymology

Latin, having performed his duty, having served its purpose