at
any place when persons belonging to the military service are present,
all officers and enlisted men not in formation shall stand at
attention facing toward the music (except at retreat when they shall
face toward the flag). If in uniform, covered or uncovered, or in
civilian clothes, uncovered, they shall salute at the first note of
the Anthem, retaining the position of salute until the last note of
the Anthem. If not in uniform and covered, they shall uncover at the
first note of the Anthem, holding the headdress opposite the left
shoulder and so remain until its close, except that in inclement
weather the headdress may be held slightly raised.

The same rules apply when "To the Color" or "To the Standard" is
sounded as when the National Anthem is played.

=1573. National anthems of other nations.= The same marks of respect
prescribed for observance during the playing of the National Anthem of
the United States shall be shown toward the national anthem of any
other country when played upon official occasions.

=1574. At retreat.= The flag will be lowered at the sounding of the
last note of the retreat, and while the flag is being lowered the band
will play the National Anthem, or, if there be no band present, the
field music will sound "To the Color." When "To the Color" is sounded
by the field music while the flag is being lowered the same respect
will be observed as when the National Anthem is played by the band,
and in either case officers and enlisted men out of ranks will face
toward the flag, stand at attention, and render the prescribed salute.

=1575. Colors and standards.= Officers and enlisted men passing the
uncased color (or standard) will render honors as follows: If in
uniform they will salute as described in par. 1551; if in civilian
dress and covered, they will uncover, holding the headdress opposite
the left shoulder with the right hand; if uncovered, they will salute
with the right-hand salute.

By "Colors" and "Standards" is meant the national flags and the
regimental flags that are carried by regiments and separate
battalions. The national flag may be of either silk or bunting; the
regimental flag is always of silk. In the Army Regulations the word
"Color" is used in referring to regiments of Infantry, the Coast
Artillery and battalions of Philippine Scouts, while "Standard" is
used in reference to regiments of Cavalry and Field Artillery.

By _uncased_ colors and standards are meant color