Considering the rules are pretty sensible, I don't think that needlessly complicated regionist BS is really needed.
I think the question about region was pertaining to the server location, with regard to ping. That is typically why a host calls an event NA, EU, or AU. So people know where the server is located.
I don't like the rules cause you cannot pick up an MG when the gunner is dead.
But it is a conquest event. So if a machine gunner dies, he leaves behind a MG on the ground, and then respawns with a MG. Within minutes there will be whole machine gun squads.