A mental, behavioral or emotional disorder according to the most recent edition of the Diagnostic and Statistical Manual of Mental Disorders, in members 18 years and older, that results in functional impairment which substantially interferes with or limits one or more major life activities (e.g., maintaining interpersonal relationships, activities of daily living, self-care, employment, recreation) that have occurred within the last year. All of these disorders may have acute episodes as part of the chronic course of the disorder. An organization may also use its state's definition or the definition of another appropriate regulatory authority.