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)
Occupational Safety and Health Administration, Directive DIR 2021-01 (CPL-03), National Emphasis Program - Coronavirus Disease 2019 (COVID-19) (Mar. 12, 2021) (Ex. SEC-09-018)
Occupational Safety and Health Administration, Directive DIR 2021-03 (CPL 03), Revised National Emphasis Program - Coronavirus Disease 2019 (COVID-19) (July 7, 2021) (Ex. SEC-09-019)
