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

(a) You must not do any of the following things on the basis that a passenger has a communicable disease or infection, unless you determine that the passenger's condition poses a direct threat:

(1) Refuse to provide transportation to the passenger;

(2) Delay the passenger's transportation (e.g., require the passenger to take a later flight);

(3) Impose on the passenger any condition, restriction, or requirement not imposed on other passengers; or

(4) Require the passenger to provide a medical certificate.