Although not defined in the regulations, OCR has interpreted it to mean “unable to perform a major life activity that the average person in the general population can perform; or restricted as to the condition, manner, or duration under which an individual can perform a major life activity as compared to the condition, manner, or duration under which the average person in the general population can perform that same major life activity.” In a letter from the Office of Civil Rights (OCR), they state, “this is a determination to be made by each local school district and depends on the nature and severity of the person’s disabling condition.”