NetworkCounterpartySystemStatusRequest <BC> message – FIX 5.0 SP1 – FIX Dictionary

Used to restrict updates/request to a list of specific CompID/SubID/LocationID/DeskID combinations.

If not present request applies to all applicable available counterparties. EG Unless one sell side broker was a customer of another you would not expect to see information about other brokers, similarly one fund manager etc.