You can reset or set Sitetype property of a SFW dynamic volume either through Veritas Enterprise Administrator (VEA) GUI or command line options.
When performing operations like subdisk move & disk evacuation for site-based volumes, storage must come from the same site as the one to which the volume belongs; otherwise, the operation fails. If you are mirroring a Site-Confined volume or trying to grow a site-based volume (Site-Confined or Site Separated), then also storage should come from the same site as the original volume.