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              Congressional                                             ______
            *aResearch Service






Legal Issues Related to Transportation

Mask-Wearing Mandates



April  12, 2021

On January 21, 2021, President Joe Biden issued an executive order directing federal agencies to require
mask wearing in a range of transportation contexts nationwide. In response, the Centers for Disease
Control and Prevention (CDC) issued an order (Mask Order) requiring mask wearing on commercial and
public transportation. A number of other federal agencies have since taken additional actions to support
the enforcement of these mask-wearing requirements. This Legal Sidebar provides a brief overview of the
CDC's  Mask Order and the role of other federal agencies in enforcing its requirements. It then discusses a
number of related legal considerations for Congress, including the scope of the federal government's
authority to impose mask-wearing requirements in transportation contexts.

CDC Mask Order
The Mask Order requires passengers and personnel on covered modes of transportation and at
transportation hubs to wear masks that cover the mouth and nose. The CDC also has issued guidance
listing the specific attributes of masks that satisfy CDC requirements. The Mask Order applies broadly
across commercial and public transportation, such as aircraft, trains, buses, ferries, and taxis, as well as at
transportation hubs, such as airports and train stations. Operators of covered modes of transportation and
transportation hubs must use best efforts to ensure that individuals comply with the mask-wearing
requirements. The Mask Order contains a number of exclusions, such as exempting certain people with
disabilities and children under two years of age from the mask mandate. The order does not apply in
states or localities that enforce mask-wearing requirements providing the same level of public health
protection as the CDC's requirements.

Enforcement
The CDC  states that it may enforce the mask-wearing requirements through criminal penalties, but that it
does not intend to rely primarily on these criminal penalties. Instead, the CDC expects widespread
voluntary compliance, as well as support from other federal agencies in implementing civil enforcement
measures. A number of federal agencies have now taken such action.



                                                                Congressional Research Service
                                                                https://crsreports.congress.gov
                                                                                    LSB10589

CRS Legal Sidebar
Prepared for Members and


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