|fəŋ(k)təsəˈfishēˌō adjective
Etymology: Latin, having performed his duty, having served its purpose
: of no further official authority or legal efficacy — used of an officer no longer in office or of an instrument, power, or agency that has fulfilled the purpose of its creation
once exercised, their power of approval or disapproval is functus officio — U.S. Fed. Supplement