(2) If two detachments or other commands meet, their commanders will exchange salutes, both commands being at attention.
761. Salutes and honors, as a rule, are not paid by troops actually engaged in drill, on the march, or in the field under campaign or simulated campaign conditions. Troops on the service of security pay no compliments whatever.
762. If the command is in line at a halt (not in the field) and armed with the rifle, or with sabers drawn, it shall be brought to _present arms_ or _present sabers_ before its commander salutes in the following cases: When the National Anthem is played, or when _to the color_ or _to the standard_ is sounded during ceremonies, or when a person is saluted who is its immediate or higher commander or a general officer, or when the national or regimental color is saluted.
763. At parades and other ceremonies, under arms, the command shall render the prescribed salute and shall remain in the position of salute while the National Anthem is being played; also at retreat and during ceremonies when _to the color_ is played, if no band is present. If not under arms, the organizations shall be brought to attention at the first note of the National Anthem, _to the color_ or _to the standard_, and the salute rendered by the officer or noncommissioned officer in command as prescribed in regulations, as amended herein.
764. Whenever the National Anthem is played 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 slightly raised.
The same rules apply when _to the color_ or _to the standard_ is sounded as when the National Anthem is played.
When played by an Army band, the National Anthem shall be played through without repetition of any part not required to be repeated to make it complete.