For VSAM data sets, DFSMSdss uses the expiration date from the source catalog entry to set the target’s expiration date in both the catalog and the VTOC. For an indexed VSAM data set, the expiration date in the VTOC for the index component is zero.

For non-VSAM data sets, DFSMSdss uses the expiration date from the source VTOC to set the target expiration date in both the catalog and VTOC. If the expiration date violates the target’s management class retention period, SMS modifies the date to conform with the management class.