Individuals wearing the U.S. Marine, Navy or Air Force uniforms will wear the designated headgear of their respective service branch.
Headgear is part of the uniform and is worn with the uniform except as follows:
) Need not be worn in private vehicles or commercial conveyances
e. trains, taxis, buses, etc.);
) Will not be worn indoors unless under arms in an official capacity or unless directed by the commander; and
) Individuals not required to wear headgear with the Army blue or white dress uniforms to an evening social event.
When it is not worn personnel will carry their headgear. Personnel
will not attach headgear to the uniform, hang it from the belt, or put it in a uniform pocket.