Chicago Transit Authority, in conjunction with the Chicago Department of Public Health, CTA coronavirus operating rules: passenger capacity limits, rear-door boarding, mask requirement (agency page as archived June 2, 2020) (Ex. MET-CHI-050)
Commissioner Allison Arwady, M.D., Chicago Department of Public Health, Emergency Travel Order (Public Health Order 2020-10 and successors) (July 2, 2020) (Ex. ECO-C-031)
Commissioner of Health of the City of Chicago, Public Health Order No. 2020-10 (July 2, 2020) (Ex. MET-CHI-019)
