Once a sergeant, still a Marine.

I would be a little careful. As stated above, if you superiors have a problem, then you have a problem. On the other hand, it's easier to get forgivenss than permission. You could just wear it and see what happens. Might have ot change, but not likely to see any real repuscussions like article 81 or anything. Make it look sharp and militarily crisp and chances are you'll be OK.

Good luck and keep us posted.

Semper fi.