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

(2) For purposes of paragraph (b)(4) of this section, you may require, contrary to the individual's self-assessment, that an individual with both severe hearing and vision impairments must travel with a safety assistant if you determine that—

(i) The means of communication that the individual has explained to you does not adequately satisfy the objectives identified in paragraph (b)(4) of this section; or

(ii) The individual proposes to establish communication by means of finger spelling and you cannot, within the time following the individual's notification, arrange for a flight crew member who can communicate using this method to serve the passenger's flight.