Federal Aviation Administration Draft Advisory Circular 150/5360-14A, Access to Airports by Individuals with Disabilities

1.6.14 Regarded as having such an Impairment.
An individual who has a physical or mental impairment that does not substantially limit major life activities, but who is treated by a public or private entity as constituting such a limitation; has a physical or mental impairment that substantially limits a major life activity only as a result of the attitudes of others toward such an impairment; or has none of the impairments defined but is treated by a public or private entity as having such an impairment. (49 CFR § 37.3).