If you have an eligible condition of autism, in order to meet the definition of substantial limitations you must meet the criteria in subsections (1) and (2) in this section:

(1) Documentation of an adaptive skills test score of more than two standard deviations below the mean as described in WAC 388-823-0740 and subject to all of WAC 388-823-0740 and 388-823-0750, and

(2) If your diagnosis is autism spectrum disorder per the DSM-5, documentation of a FSIQ of more than one standard deviation below the mean as described in WAC 388-823-0720 and subject to all of WAC 388-823-0720 and 388-823-0730.

(a) If you have a FSIQ score of one standard deviation below the mean or higher as described in WAC 388-823-0720, you may present additional documentation described in subitem (i) or (ii) in this subsection, signed by the diagnosing professional, which shows that you meet the criteria for autistic disorder 299.00 per the DSM-IV-TR:

(i) A completed autistic disorder confirmation form (available from DDA), or

(ii) Other documentation that provides the same information as required on the autistic disorder confirmation form.

(b) If you are unable to complete a FSIQ test, you may provide a statement by the diagnosing professional that your condition is so severe that you are unable to demonstrate the minimal skills required to complete testing.