We adjudicate claims at the third step of our sequential evaluation process for evaluating disability using the Listing of Impairments (the Listings) under the Social Security and Supplemental Security Income (SSI) programs. This final rule extends until July 2, 2002, the date on which the respiratory body system listings will no longer be effective. We have made no revisions to the medical criteria in these listings; they remain the same as they now appear in the Code of Federal Regulations. This extension will ensure that we continue to have medical evaluation criteria in the listings to adjudicate claims for disability based on impairments in the respiratory body system at step three of our sequential evaluation process.