Passage: The United States order of precedence lists the ceremonial order for domestic and foreign government officials (military and civilian) at diplomatic, ceremonial, and social events within the United States and abroad.  Former Presidents, Vice Presidents, First Ladies, Second Ladies, and Secretaries of State and retired Supreme Court Justices are also included in the list.  The order is established by the President, through the Office of the Chief of Staff, and is maintained by the State Department's Office of the Chief of Protocol.  It is only used to indicate ceremonial protocol and has no legal standing; it does not reflect the presidential line of succession or the co-equal status of the branches of government under the Constitution. The Office of the Chief of Protocol posted an updated order of precedence on November 3, 2017.

Question: What does the Official protocol do?
It is only used to indicate ceremonial protocol and has no legal standing