Normally I would not support this kind of an amendment, and analogizing to a civil system or a non-military system I think the 12 months would be quite arbitrary. But in this particular case I support it, only because the military is a closed culture.
One of the things that kills morale faster than anything else is an outstanding grievance. If, in fact, on the one hand you have to have a system that is not dealing with problems as the grievers think they should be dealt with, you're going to get all kinds of collateral damage, which I don't think is necessary or desirable.
My thought on this is that if you don't send up a red flag, then no one will salute it. So in this particular case, because it is a military culture, I think it should be dealt with expeditiously. I don't know that you can leave it to just guidelines.