(4) Before addressing an officer an enlisted man makes the prescribed salute with the weapon with which he is armed, or if unarmed, with the right hand. He also makes the same salute after receiving a reply.
913. (1) In uniform, covered or uncovered, but not in formation, officers and enlisted men, salute military persons as follows: With arms in hand, the salute prescribed for that arm (sentinels on interior guard duty excepted); without arms, the right-hand salute.
(2) In civilian dress, covered or uncovered, officers and enlisted men salute military persons with the right-hand salute.
(3) Officers and enlisted men will, render the prescribed salutes in a military manner, the officer junior in rank or the enlisted men saluting first. When several officers in company are saluted all entitled to the salute shall return it.
(4) Except in the field under campaign or simulated campaign conditions, a mounted officer (or soldier) dismounts before addressing a superior officer not mounted.
(5) A man in formation shall not salute when directly addressed, but shall come to attention if at rest or at ease.
914. (1) Saluting distance is that within which recognition is easy. In general, it does not exceed 30 paces.
(2) When an officer entitled to the salute passes in rear of a body of troops, it is brought to attention while he is opposite the post of the commander.
915. In public conveyances, such as railway trains and street cars, and in public places, such as theaters, honors and personal salutes may be omitted when palpably inappropriate or apt to disturb or annoy civilians present.
925. Soldiers at all times and in all situations pay the same compliments to officers of the Army, Navy, Marine Corps, and Volunteers, and to officers of the National Guard as to officers of their own regiment, corps, or arm of service.