it is really up to you Platoon Commander and pretty much the company staff. we were allowed to used them for conditioning hikes, SULE II, and i think one more event. but we all purchased them there. because if the staff doesnt authorize the use of them, it is just added weight to your pack. when you get there and the pressure and the other BS is done with, ask your Platoon Commander (Capt). he should find out for you. then you can go to the PX and purchase them on LIBO.