NOTE: The National Disability Determination Services System (NDDSS) was changed to preclude
            the entry of VR referral coding with the exception of “N” (Not referred for Vocational
            Rehabilitation), and “C” (Child Claimant Referred to State Agency Responsible for
            Administering the Title V Agency Program in the State). Neither of these codes is
            shown on Form SSA-831. The NDDSS inserts the code “N” on the database and displays
            it on a query response if the VOC field is left blank.