In the United States, the Americans with Disabilities Act (ADA) defines a disability as "a physical or mental impairment that substantially limits one or more of the major life activities of such individual," and therefore allows handlers of psychiatric service dogs the same rights and protections afforded to those with other types of service animals. Service dogs, including psychiatric service dogs, are allowed to accompany their handler in any location that is normally accessible to the public regardless of whether health codes or business policies normally would allow a dog to enter, provided the dog behaves properly and does not interfere with normal operations (e.g. barking, biting, defecating, or obstructing other people) or pose a direct threat to the safety of others.