The flag, when flown at half-staff, should be first hoisted to the peak for an instant and then lowered to the half-staff position. The flag should be again raised to the peak before it is lowered for the day. On Memorial Day the flag should be displayed at half-staff until noon only, then raised to the top of the staff. On the following days, the flag is to be flown at half-mast for the entire day: December 7 - Pearl Harbor Day; May 15 - Peace Officers Memorial Day; July 27 - Korean War Veterans Armistice Day.
By order of the President, the flag shall be flown at half-staff upon the death of principal figures of the United States Government and the Governor of a State, territory or possession, as a mark of respect to their memory. In the event of the death of other officials or foreign dignitaries, the flag is to be displayed at half-staff according to Presidential instructions or orders, or in accordance with recognized customs or practices not inconsistent with law.
In the event of the death of a present or former official of the government of any State, territory or possession of the United States, the Governor of that State, territory or possession may proclaim that the National flag may be flown at half-staff.