{"data":{"id":"us-il/405-ilcs-5-1-129","jurisdiction":"us-il","citation":"405 ILCS 5/1-129","heading":"Mental illness.","body":"(Text of Section before amendment by P.A. 104-698)\n\"Mental illness\" means a mental, or emotional disorder that substantially impairs a person's thought, perception of reality, emotional process, judgment, behavior, or ability to cope with the ordinary demands of life, but does not include a developmental disability, dementia or Alzheimer's disease absent psychosis, a substance use disorder, or an abnormality manifested only by repeated criminal or otherwise antisocial conduct.\n(Text of Section after amendment by P.A. 104-698)\nMental illness. \"Mental illness\" means a mental, or emotional disorder that substantially impairs a person's thought, perception of reality, emotional process, judgment, behavior, or ability to cope with the ordinary demands of life, but does not include a developmental disability, a neurocognitive disorder absent psychosis, a substance use disorder, or an abnormality manifested only by repeated criminal or otherwise antisocial conduct.","path":["CHAPTER 405 MENTAL HEALTH, BEHAVIORAL HEALTH, AND DEVELOPMENTAL DISABILITIES","Mental Health and Developmental Disabilities Code."],"source_url":"https://www.ilga.gov/legislation/ILCS/details?ActID=1496\u0026ChapterID=34\u0026ChapAct=FullText\u0026Print=True","current_through":"at least Public Act 104-790","vintage":"","retrieved_at":"2026-09-15T04:46:34Z","sha256":"2950286655ac7252e538a2a5e94021e09175d19bb83195271c9c179d5757777c","source_id":"us-il","stale":false,"prev":"us-il/405-ilcs-5-1-128.5","next":"us-il/405-ilcs-5-2-100"},"notice":"GroundRules: Original legal text. Not legal advice."}