From the Presentation: "Assets, systems, and networks, whether physical or virtual, are considered so vital to the United States that their incapacitation or destruction would have a debilitating effect on security, national economic security, national public health or safety, or any combination."
U.S. Cybersecurity and Infrastructure Security Agency: https://www.cisa.gov/
12th Chemical Sector Security Summit. New Orleans, LA. July 16-18, 2019