There are a lot of things that are not covered in the ARs, I guess they didn't think it was necessary on some subjects. Example: Swords and sabres are authorized on everything from Class As to army dress whites and army dress blues but there is nothing in the ARs about anything concerning swords or sabres except presenting arms and walking with the sword and of course HOW to wear one but AR-670-1 doesn't say much else. If ever there are any questions about anything that I do I just ask for the AR that regulates it. That gets them evey time.
I remember reading once in the Stars and Stripes about an Air Force PVT that had a chestfull of ribbons and was assigned to Rhein Mein AFB in Germany. He was stopped and questioned by just about everyone in authority about his ribbons, it turned out that he had prior service in the Army and had served two tours in Nam.

Chris.