officiate
Officiate is a verb meaning to perform the duties of an official at an event, ceremony, or proceeding, or to act as a presiding officer or referee according to the rules of a governing body. The term can apply to both ceremonial roles and organizational or competitive settings, and it often implies formal authority and adherence to established procedures.
In ceremonial contexts, to officiate at a wedding, funeral, or religious rite means to oversee the proceedings,
In sports and similar events, officials who officiate enforce rules, supervise the competition, and render judgments
Etymology-wise, officiate derives from Old French officier, from Latin officium, meaning a public duty or function.