For SMS-managed data sets, ALTER access lets you delete the data set. For non-SMS-managed data sets, either ALTER access to the data set or ALTER access to the catalog and READ access to the data set lets you copy and delete the data set. The ability to delete and uncatalog a data set with READ access to the data set and ALTER access to the catalog lets you move a data set without having ALTER access to the data set. You only need UPDATE access to the catalog to delete an unprotected, non-SMS-managed data set.