49 CFR Part 27 - Nondiscrimination on the Basis of Disability in Programs or Activities Receiving Federal Financial Assistance (with amendments issued through Aug. 2015)

(b) Airports shall, in cooperation with carriers serving the airports, provide boarding assistance to individuals with disabilities using mechanical lifts, ramps, or other devices that do not require employees to lift or carry passengers up stairs. This section applies to all aircraft with a passenger capacity of 19 or more passenger seats, except as provided in paragraph (e) of this section. Paragraph (c) of this section applies to U.S. carriers and paragraph (d) of this section applies to foreign carriers.