Occupational Safety and Health Administration, OSHA Alert 4000-03R 2021, COVID-19 Guidance for Construction Workers (original alert April 2020) (Mar. 1, 2021) (Ex. SEC-09-020)
Cybersecurity and Infrastructure Security Agency, Department of Homeland Security (Director Christopher C. Krebs), Guidance on the Essential Critical Infrastructure Workforce, Version 3.0 (Apr. 17, 2020) (file opens with the Mar. 28, 2020 advisory memorandum) (Ex. SEC-09-036)
