In this section, the term “critical infrastructure” means systems and assets, whether physical or virtual, so vital to the United States that the incapacity or destruction of such systems and assets would have a debilitating impact on security, national economic security, national public health or safety, or any combination of those matters.
42 U.S. Code § 5195c. Critical infrastructures protection
Section was enacted as the Critical Infrastructures Protection Act of 2001 and also as part of the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 or USA PATRIOT Act, and not as part of the Robert T. Stafford Disaster Relief and Emergency Assistance Act which comprises this chapter.
For transfer of functions, personnel, assets, and liabilities of the National Infrastructure Simulation and Analysis Center of the Department of Energy, including the functions of the Secretary of Energy relating thereto, to the Secretary of Homeland Security, and for treatment of related references, see sections 121(g)(4), 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganization Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6.