We use the Listing of Impairments (the listings) in appendix 1 to subpart P of this part, at the third step of the sequential evaluation process when we evaluate your claim for benefits based on disability under title II and title XVI of the Social Security Act (the Act). This final rule extends until July 2, 2007, the date on which the listings for the digestive system will no longer be effective. Other than extending the date during which the digestive listings will be effective, we have made no revisions to the 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 disability claims in this body system at the third step of the sequential evaluation process.