Went back up and came down again after fruitlessly trying to find a security person to issue a pass (of course no one was there at 6:30). This time security wasn't looking and I made it out.
"This is your company's rule!" the guard yelled back at me when I had expressed shock. Oh yeah? Well my company should issue a fucking memo about that because that is ridiculous, changing the rules like that and not alerting anyone. I am steaming mad and I am most definitely going to complain.