The revised Lieberman-Collins bill, dubbed the Protecting Cyberspace as a National Asset Act, works this way: Homeland Security will "establish and maintain a list of systems or assets that constitute covered critical infrastructure" and that will be subject to emergency decrees. (The term "kill switch" does not appear in the legislation.)Under the revised legislation, the definition of critical infrastructure has been tightened. DHS is only supposed to place a computer system (including a server, Web site, router, and so on) on the list if it meets three requirements. First, the disruption of the system could cause "severe economic consequences" or worse. Second, that the system "is a component of the national information infrastructure." Third, that the "national information infrastructure is essential to the reliable operation of the system."