Mayor Lori E. Lightfoot, Executive Order No. 2020-2 (Apr. 7, 2020) (Ex. MET-CHI-052)
Commuter Rail Division of the Regional Transportation Authority (Metra), Metra COVID-19 operating rules: mask mandate and alternate schedules (agency page as archived Aug. 2, 2021) (Ex. MET-CHI-051)
