To apply the MIRS for a potential closed period of disability, use the EOD as the
                  comparison point even if the onset date is earlier than the EOD. For further instructions
                  on comparison point decisions for a closed period, see DI 28010.020B3.
               If you establish disability for a continuous period of not less than 12 months and,
                  after that time, the claimant demonstrates MI (or an exception to MI applies), you
                  may find that disability ended, as described in DI 28005.205C.8.
               SSA requires a personalized disability explanation (PDE) for closed period allowances.
                  Send the PDE with an SSA-L1157–DI or SSA-L1157–SI.
               
               See details :
               DI 26530.015 Personalized Disability Explanation in Initial Closed Period and Unfavorable Onset
                  Date Allowances
               
               NOTE: Do not establish the end of a closed period of disability simply because the claimant
                  has returned to work at the SGA level, as the claimant may be entitled to work incentives.
                  Establish the EOD and complete an assistance request (AR) to the field office to investigate
                  the work issue for a work continuing disability review.
               
               See details:
               DI 13010.010 Handling Events That May Require a Work Continuing Disability Review (CDR)