IIRC there is a sign clearly posted on the front of the building when you enter. If it isn't there, there's a security guard right at the front that will tell you to go put it away. Leave it in the truck for this one.From what I've read you can open carry in Gov. building's as long there are no anti-gun signs or metal detectors. Or is that only for CC. I have a registration coming up and possibly get a new plate for my truck.