The POW/MIA flag has several flag display rules unique to it. Here are some of the main points of POW/MIA flag etiquette and rules of display:
1) When flying the POW/MIA flag on the same pole as the American flag, it should be the same size or one size smaller than the American flag and be flown just underneath the National Colors.
2) When the POW/MIA flag is to be displayed as part of a group of two flagpoles, it may either be displayed on its own flagpole or again beneath the U.S. flag. A state flag may be displayed on its own on the second flagpole, to the right of the American and POW flags as you face the building and flagpoles.
3) On Half Staff days: Peace Officers Memorial Day (May 15th), Memorial Day (the last Monday in May - from sunrise until noon), Patriot Day (September 11th), Pearl Harbor Memorial Day (December 7th), and on other days as directed by the President of the United States - the POW/MIA should also be lowered to half staff along with the National Colors.
4) POW/MIA Flag Recognition Day is observed on the Third Friday of each September. On POW/MIA Remembrance Day, the POW/MIA flag should not be lowered to half staff, but should be flown (especially over the following locations) at full staff along with the U.S. flag: the Capitol and the White House in Washington, DC, the Korean War and Vietnam Veterans War Memorials, every National Cemetery, any building containing the official offices of the Secretary of State, the offices of the Secretary of Veterans Affairs, the offices of the Director of the Selective Service System, every major military installation, every VA Medical Center, and every Post Office.