Serious Emotional Disturbance (SED):  

  1. Children from birth up to age 18;
    AND

  2. Child currently or at any time during the past year, has had a diagnosable mental, behavioral, or emotional disorder of sufficient duration to meet diagnostic criteria;
    AND

  3. The mental, behavioral or emotional disorder has resulted in functional impairment which substantially interferes with or limits the child’s role or functioning in family, school, or community activities. Such roles or functioning include achieving or maintaining developmentally appropriate social, behavioral, cognitive, communicative, or adaptive skills. Functional impairments of episodic, recurrent, and continuous duration are included unless they are temporary and expected responses to stressful events in the environment.