The Supreme Court decided under Title II of the ADA that mental illness is a form of disability and therefore covered under the ADA, and that unjustified institutional isolation of a person with a disability is a form of discrimination because it "...perpetuates unwarranted assumptions that persons so isolated are incapable or unworthy of participating in community life." The court added, "Confinement in an institution severely diminishes the everyday life activities of individuals, including family relations, social contacts, work options, economic independence, educational advancement, and cultural enrichment."
The Access Board is responsible for developing and updating design guidelines known as the ADA Accessibility Guidelines (ADAAG). These guidelines are used by the Department of Justice (DOJ) and the Department of Transportation (DOT) in setting enforceable standards that the public must follow. Both DOJ’s and DOT’s current ADA Standards are based on the Board’s updated ADAAG (2004). As a result, for the most part, these two sets of standards are very similar. However, each contains additional requirements that are specific to the facilities covered by the respective agencies. These additional requirements define the types of facilities covered, set effective dates, and provide additional scoping or technical requirements for those facilities. DOJ’s ADA Standards apply to all facilities except public transportation facilities, which are subject to DOT’s ADA Standards. The edition of the ADA Standards provided here on the Board’s website includes DOJ’s and DOT’s additional provisions.
Spector v. Norwegian Cruise Line Ltd. was a case that was decided by the United States Supreme Court in 2005. The defendant argued that as a vessel flying the flag of a foreign nation it was exempt from the requirements of the ADA. This argument was accepted by a federal court in Florida and, subsequently, the Fifth Circuit Court of Appeals. However, the U.S. Supreme Court reversed the ruling of the lower courts on the basis that Norwegian Cruise Lines was a business headquartered in the United States whose clients were predominantly Americans and, more importantly, operated out of port facilities throughout the United States.