functus officio

adjective | \ ˈfəŋk-təs-ə-ˈfi-shē-ō, ˈfu̇ŋk-tu̇s-ȯ-ˈfē-kē-ō \ | func·tus of·fi·cio
  1. : 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