Thank you JungleSkip and Natespf for actually reading up on this instead of just freaking out like most of the internet has.
Disney shut it down on their own, they did get fined but not shut down. Issue is if you have outstanding OSHA violations and someone gets hurt thing about the liability that places you in, and think about how that would affect their insurance premiums.
The real question here is the contractor got hurt in November, how did it take until the fines were released for them to decided the need tie off points.
I understand if it was under active investigation they might not be able to change anything, but at least have the design and permits done so as soon as the investigation is over they can go to work installing.