14 CFR Part 382 Nondiscrimination on the Basis of Disability in Air Travel (Air Carrier Access Act) (with amendments issued through May 2016)

(b) Except for foreign carriers conducting operations of a nature equivalent to on-demand air taxi operations by a U.S. carrier, as a foreign carrier conducting passenger service you must permit any individual with a disability to use in the passenger cabin during air transportation to, from or within the United States, an electronic assistive device specified in paragraph (d) of this section on all aircraft originally designed to have a maximum passenger capacity of more than 19 seats unless:

(1) The device does not meet requirements for medical portable electronic devices set by the foreign carrier's government if such requirements exist;

(2) The device does not meet requirements for medical portable electronic devices set by the FAA for U.S. carriers in circumstances where requirements for medical portable electronic devices have not been set by the foreign carrier's government and the foreign carrier elects to apply FAA requirements for medical portable electronic devices; or

(3) The device cannot be stowed and used in the passenger cabin consistent with applicable TSA, FAA and PHMSA regulations, and the safety or security regulations of the foreign carrier's government.