BUSS requires the 3 ADR's be physically deselected.
This instrument (virtual BUSS) is present and works even when the 3 ADR's are activated
It handles all kinds of protections AOA of the Airbus (Alpha prot .. Alpha floor .. etc. ..) in normal law
This instrument is hidden .. pilots do not see him
The problem is that when the aircraft leaves the normal law ... this (virtual) instrument stops working
