Just picking up on this - I've done some considerable staff work on this in the past for various reasons.
The two documents that define crew commander requirements are B-GL-381-001 Training Safety and and LFCO on vehicles (can't recall the number of the top of my head).
Critically, a vehicle that has separate compartments for crew members is deemed to be a crewed vehicle. An LUVW is explicitly listed as a non-crewed vehicle (so, for that matter, is the RG-31).
381 states crew commanders are required when coordination is required to move and shoot a vehicle a vehicle in a tactical environment. So, to me, shooting static from a vehicle that isn't listed as a crewed vehicle doesn't require a qualified crew commander. The Armoured School may promulgate its own, more restrictive, regulations but IAW my reading of all applicable Army regulations a crew commander is not required.
It's important to hit the books and understand policy - people will default to "SME" status and say "it's policy" when they don't know or have forgotten what specific policy states. I've had people try to say no to something or try to throw roadblocks up quoting some obscure policy only to blow fishkisses when I asked for the specific reference.
