We propose to revise our rules regarding when and how often we conduct continuing disability reviews (CDR). The proposed regulations would add a new category to our existing medical diary categories that we use to schedule CDRs and would revise the criteria we follow to place a case in each of the categories. They would also change how often we perform a CDR for claims with the medical diary category for permanent impairments. These revised regulations would ensure that we continue to identify medical improvement at its earliest point and remain up to date with current research.