The United States order of precedence is an advisory document maintained by the Ceremonials Division of the Office of the Chief of Protocol of the United States which lists the ceremonial order, or relative preeminence, for domestic and foreign government officials (military and civilian) at diplomatic, ceremonial, and social events within the United States and abroad. The list is used to mitigate miscommunication and embarrassment in diplomacy, and offer a distinct and concrete spectrum of preeminence for ceremonies. Often the document is used to advise diplomatic and ceremonial event planners on seating charts and order of introduction. Former presidents, vice presidents, first ladies, second ladies, and secretaries of state and retired Supreme Court justices are also included in the lis