Centers for Disease Control and Prevention (U.S.). Order Under Section 361 of the Public Health Service Act (42 U.S.C. 264) and 42 Code of Federal Health Regulations 70.2, 71.31(b), 71.32(b) : Requirement for Persons to Wear Masks While On Conveyances and at Transportation Hubs, Centers for Disease Control and Prevention : Documents Relating to the COVID-19 Pandemic. https://fraser.stlouisfed.org/archival/6318/item/615310, accessed on December 30, 2024.