"[Eugene Volokh] Amazon Web Services and the zombie apocalypse"

Could be useful...

"However, this restriction will not apply in the event of the occurrence (certified by the United States Centers for Disease Control or successor body) of a widespread viral infection transmitted via bites or contact with bodily fluids that causes human corpses to reanimate and seek to consume living human flesh, blood, brain or nerve tissue and is likely to result in the fall of organized civilization."

via The Volokh Conspiracy