such actions as are necessary to require, for the period beginning on the date of enactment of this Act and for the duration of the public health emergency declared relating to COVID–19, and for the duration of any other public health emergency declared after the date of enactment of this Act, the air carriers, rail carriers, owners and operators of airports, and owners and operators of train stations to— (1) require passengers of such air carrier or rail carrier or individuals present at such airport or train station to wear personal protective equipment, including masks, gloves, and eyewear (as appropriate), while traveling on an aircraft or train of such air carrier or rail carrier or while present at an airport or train station