Ill. Admin. Code tit. 59, § 117.305
b) Documentation of a severe emotional disturbance shall be based on a comprehensive, documented evaluation by a licensed clinical psychologist or psychiatrist who shall verify that the child has a primary diagnosis which meets the DSM-III-R criteria of a mental disorder with onset in childhood or adolescence (excluding V-codes, adjustment disorders, mental retardation when no other mental disorder is present, or other forms of dementia based on organic, physical or alcohol/substance abuse disorders). A child who suffers from this severe disability requires sustained treatment intervention for a year or more and generally requires attention from two or more agencies. The child must meet DSM-III-R Axis V criteria of severe functional impairment (a score of 40 or below on the Global Assessment of Functioning Scale (GAF Scale) contained in the DSM-III-R) and must be experiencing significant limitations of major life activities in his or her capacity for living in a family or family equivalent and in two or more of the following areas (not to include impairment in functioning due to physical or environment limitation):
The eligibility determination process for the Family Assistance Program shall be conducted as follows: