This is a read-only SecondaryState object carrying supplementary status information for the GE 4 Port Expansion Card that refines what its operational state alone would show. It is useful to an administrator because it can reveal transitional or qualified conditions on the GE 4 Port Expansion Card, such as being in a testing or partially-degraded mode, that a plain up/down flag would hide. For example, after reseating the GE 4 Port Expansion Card, the operator polls this value to confirm the card has cleared any lingering secondary condition before declaring it fully restored.