AR 670-1
paragraph 1-15
"Conservative prescription and nonprescription sunglasses are authorized for wear when in a garrison environment, except when in formation and while indoors."
When conducting PT (in garrison) you are always in some kind of formation, be it a standard formation, extended rectangular formation, or circle formation.
Army Regulation 600-85
Army Regulation 601-210 covers Active and Reserve Components Enlistment Army Regulation 601-280 covers Army Rentention Program
Army Bands.
608-1
25-2
There is no regulation, it is entirely up to the company commander.
Army Regulation 530-1 and Army Regulation 25-1
Army Regulation 690-950
I don't thing that the Hungarian army has a regulation 2550.
Army Regulation 600-82
Army Regulation 600-85
It depends which army you mean
Army Regulation 601-210 covers Active and Reserve Components Enlistment Army Regulation 601-280 covers Army Rentention Program
Regulation is a noun, as in a law or a rule. It is an adjective, as in 'regulation army equipment'
Army Bands.
Army Regulation 614-200, Enlisted Assignments And Utilization Management
Army Regulation 380-10