This DisplayString object names an address-list object that represents the full set of source addresses for a General Access List rule, replacing a single address/mask pair with a named group. For the rule to actually work, the desc notes there must be a matching entry in csOrionAddressListTable whose csOrionAddressListName equals this value, so an administrator must define the group before referencing it here. For example, an admin could create an address-list named 'engineering-subnets' and reference it here so the GAL rule applies to every subnet in that group at once.