Girl With The American Flag

For 30 days – Death of a president or former president
For 10 days – Death of a vice president, Supreme Court chief justice/retired chief justice, or speaker of the House of Representatives.
From death until the day of interment – Supreme Court associate justice, member of the Cabinet, former vice president, president pro-tempore of the Senate, or the majority and minority leaders of the Senate and House of Representatives. Also for federal facilities within a state or territory, for the governor.
On the day after the death – Senators, members of Congress, territorial delegates or the resident commissioner of the commonwealth of Puerto Rico