This is pretty much a given for any regiment.
I understand not having the rosters public seems like a weird move for me to do but if anything it puts the ball in the leaders court more to be more vigilant. Last season unfortunately there was too much hand holding and I ended up doing rosters for regiments. I simply don't have the time to waste doing people's jobs for them anymore which I hope people can understand.
But yes please make sure you check with people which regiment they were actually with, or primarily with when they join your regiments. Yet again I feel as though I am telling people how to run their regiment even though it should be obvious.