In this subchapter:
(1) “Serious mental illness” means the following psychiatric illnesses as defined by the American Psychiatric Association in the Diagnostic and Statistical Manual (DSM):
(A) bipolar disorders (hypomanic, manic, depressive, and mixed);
(B) depression in childhood and adolescence;
(C) major depressive disorders (single episode or recurrent);
(D) obsessive-compulsive disorders;
(E) paranoid and other psychotic disorders;
(F) schizo-affective disorders (bipolar or depressive); and
(G) schizophrenia.
(2) “Small employer” has the meaning assigned by § 1501.002.
(3) “Autism spectrum disorder” means a neurobiological disorder that includes autism, Asperger’s syndrome, or Pervasive Developmental Disorder–Not Otherwise Specified.
(4) “Neurobiological disorder” means an illness of the nervous system caused by genetic, metabolic, or other biological factors.