CISA, Department of Homeland Security, Advisory Memorandum on Ensuring Essential Critical Infrastructure Workers' Ability to Work During the COVID-19 Response, Version 4.0 (Aug. 18, 2020) (the document also carries the Dec. 16, 2020 Version 4.0 reissue date) (Ex. ECO-A-124)
Cybersecurity and Infrastructure Security Agency (CISA), Department of Homeland Security (Director Jen Easterly), Guidance on the Essential Critical Infrastructure Workforce, Version 4.1 (Aug. 10, 2021) (Ex. SEC-18-001)
CISA, Guidance on the Essential Critical Infrastructure Workforce, Version 4.1 (Aug. 5, 2021) (Ex. SEC-07-024)
Under Secretary of Defense for Acquisition and Sustainment Ellen M. Lord, Memorandum for Defense Industrial Base, Defense Industrial Base Essential Critical Infrastructure Workforce (Mar. 20, 2020) (Ex. AGY-DEFENSE-GUARD-037)
Board of Governors of the Federal Reserve System, SR 20-6 (Mar. 27, 2020) (Ex. AGY-FED-FINANCIAL-012)
Secretary of the Treasury Steven T. Mnuchin, Statement by Secretary Steven T. Mnuchin on Essential Financial Services Workers (press release SM956), transmitting the memorandum Financial Services Sector Essential Critical Infrastructure Workers (Mar. 24, 2020) (Ex. SEC-13-001)
