29 CFR Part 1630, Regulations to Implement the Equal Employment Provisions of the ADA (Title I Regulations with amendments issued through May 2016)

(e) A covered entity is required, absent undue hardship, to provide a reasonable accommodation to an otherwise qualified individual who meets the definition of disability under the “actual disability” prong (§1630.2(g)(1)(i)), or “record of” prong (§1630.2(g)(1)(ii)), but is not required to provide a reasonable accommodation to an individual who meets the definition of disability solely under the “regarded as” prong (§1630.2(g)(1)(iii)).