Title I of the Americans with Disabilities Act of 1990 requires an employer to provide reasonable accommodation to qualified individuals with disabilities who are employees or applicants for employment, unless to do so would cause undue hardship. "In general, an accommodation is any change in the work environment or in the way things are customarily done that enables an individual with a disability to enjoy equal employment opportunities."
On March 1, 1999, the Equal Employment Opportunity Commission issued a policy guidance on reasonable accommodation and undue hardship as they relate to Title I of the ADA. The guidance is a "must-have" for all employers.