The expiration date handling is dependent upon whether the data set is VSAM or non-VSAM:

• VSAM data set: The catalog expiration date and the expiration date in the VTOC will have the same value as the catalog expiration date of the source data set. For an indexed VSAM data set, the expiration date in the VTOC for the index component will be zero. If the expiration date violates the target’s management class, SMS will change the date to conform with the management class.
• Non-VSAM data set: If there is a catalog expiration date for the source data set, then the catalog expiration date is used for both the VTOC and the catalog expiration date of the target data set. If the source data set does not have a catalog expiration date or is uncataloged, then the VTOC expiration date for the source data set is used for both the catalog and the VTOC of the target data set. If the expiration date violates the target’s management class, SMS will modify the date to conform with the management class.