The flag should never be used for any advertising purpose. It should not be embroidered, printed or otherwise impressed on such articles as cushions, handkerchiefs, napkins, boxes, or anything intended to be discarded after temporary use. Advertising signs should not be attached to the staff or halyard
The flag should not be used as part of a costume or athletic uniform, except that a flag patch may be used on the uniform of military personnel, fireman, policeman, and members of patriotic organizations.
The flag should never have placed on it, or attached to it, any mark, insignia, letter, word, number, figure, or drawing of any kind.
To salute, all persons come to attention. Those in uniform give the appropriate formal salute. Citizens not in uniform salute by placing their right hand over the heart and men with head cover should remove it and hold it to left shoulder, hand over the heart. Members of organizations in formation salute upon command of the person in charge.
The Pledge of Allegiance and National Anthem
The pledge of allegiance should be rendered by standing at attention, facing the flag, and saluting.
When the national anthem is played or sung, citizens should stand at attention and salute at the first note and hold the salute through the last note. The salute is directed to the flag, if displayed, otherwise to the music.http://www.usflag.org/flagetiquette.html
The flag should never be carried flat or horizontally, but always aloft and free.
No part of the flag should ever be used as a costume or athletic uniform. However, a flag
patch may be affixed to the uniform of military personnel, firemen, policemen, and members
of patriotic organizations. The flag represents a living country and is itself considered a living
thing. Therefore, the lapel flag pin being a replica, should be worn on the left lapel near the
Designation.—The composition consisting of the words and music known as the StarSpangled
Banner is the national anthem.
(b) Conduct During Playing.—During a rendition of the national anthem—
(1) when the flag is displayed—
(A) all present except those in uniform should stand at attention facing the flag with the right
hand over the heart;
(B) men not in uniform should remove their headdress with their right hand and hold the
headdress at the left shoulder, the hand being over the heart; and
(C) individuals in uniform should give the military salute at the first note of the anthem and
maintain that position until the last note.
(2) When the flag is not displayed, all present should face toward the music and act in the
same manner they would if the flag were displayed. https://fas.org/sgp/crs/misc/RL30243.pdf