It is the universal custom to display the flag on buildings and on stationary flagstaffs only from sunrise to sunset. However, the flag may be displayed at night on special occasions when one wishes to produce a patriotic effect.
1. When carried in a procession with another flag or flags, the U.S. flag should be either on the marching right (the flag's own right) or, if there is a line of other flags, in front of the center of that line.
2. If the flag is to appear on a float or in a parade, it should be flown from a staff. When the flag is displayed other than from a staff, it should be displayed flat, whether indoors or out, or suspended so that its folds fall as though the flag were staffed.
3. The flag should not be draped over the hood, top, sides, or back of a vehicle or boat. When the flag is displayed on a motorcar, the staff should be firmly fixed to the chassis.
4. When displayed against a wall with crossed staffs with another flag, the flag of the United States should be on the right (the flag's own right) and its staff should be in front of the staff of the other flag.
5. When a number of state flags, flags of localities or pennants of societies are grouped and displayed from staffs, the flag of the U.S. should be at the center and at the highest point of the group.
6. When other flags are flown from the same halyard, the U.S. flag should always be at the peak.
7. When flags of two or more nations are displayed, they are to be flown from separate staffs of the same height. The flags should be of approximately equal size. In times of peace, international usage dictates displaying one nation's flag equally to that of another.
8. When displaying the flag from a staff projecting from a building, the union of the flag should be placed at the peak of the staff unless the flag is at half-staff.
9. When suspended over a sidewalk from a rope extending from a house to a pole at the edge of the sidewalk, the flag should be hoisted out, union first, from the building.
10. When displayed over a street, the flag should be suspended vertically with the union to the north in an east and west street, or to the east in a north and south street.
11. When displayed flat against the wall on a speaker's platform, the flag should be placed above and behind the speaker with the union in the upper left corner as the audience faces the flag.
12. When displayed from a staff in a church chancel or on the speaker's platform in a public auditorium, the flag should occupy the position of honor and be placed at the clergyman's or speaker's right as they face the congregation or audience. When the flag is displayed other than in the chancel or on the platform, it should be placed in the position of honor at the right of the congregation or audience as they face the chancel or platform. Any other flags so displayed should be placed on the left of the congregation or audience as they face the chancel or platform.
13. When unveiling a statue or monument, the flag should be a distinctive feature of the ceremony, but it should never be used as the covering of the statue or monument.
14. When flown at half-staff, the flag should be raised to the peak for an instant and then lowered to the half-staff position. The flag should again be raised to the peak before it is lowered at the end of the day.
15. When used to cover a casket, the flag should be placed so the union is at the head and over the left shoulder. The flag should not be lowered into the grave or be allowed to touch the ground.
16. When the flag passes in a procession and during a raising and lowering ceremony, all persons present should face the flag, stand at attention, and salute. Those present in uniform should give the military salute. Men not in uniform should removed their hats with their right hand and then hold the hat at their left shoulder with their hand over their heart. Men without hats and all women should salute by placing their right hands over their hearts. The salute to the flag in a moving column should be given at the moment the flag passes.