I suspect most of these signs were printed well before the new CCW policies came into effect, and if you call them, the Open Space folks freely admit that they do NOT include holders of valid CCW permits. On other buildings, such as the County Clerk, have a generic "no weapons without legal authority" type sign. Per the law, local govt's can restrict open carry on public land (parks, trails, buildings), like Jeffco does with their new "No Open Carry" signs at trail heads.