(1) Originate before age eighteen;

(2) Be likely to continue indefinitely;

(3) Constitute a substantial disability for the individual as defined in the article.

(1) Solely psychiatric disorders where there is impaired intellectual or social functioning which originated as a result of the psychiatric disorder or treatment given for such a disorder. Such psychiatric disorders include psycho-social deprivation and/or psychosis, severe neurosis or personality disorders even where social and intellectual functioning have become seriously impaired as an integral manifestation of the disorder.

(2) Solely learning disabilities. A learning disability is a condition which manifests as a significant discrepancy between estimated cognitive potential and actual level of educational performance and which is not a result of generalized mental retardation, educational or psycho-social deprivation, psychiatric disorder, or sensory loss.

(3) Solely physical in nature. These conditions include congenital anomalies or conditions acquired through disease, accident, or faulty development which are not associated with a neurological impairment that results in a need for treatment similar to that required for mental retardation.