This is a bitmap (PortList) reporting which ports are currently, operationally acting as promiscuous ports for a given private VLAN primary/secondary pairing, meaning they can talk to all other ports in that private VLAN association. An administrator reads this to confirm which physical ports the switch has actually placed into the promiscuous role, distinct from what was merely configured, since operational state can differ if a port is down or not yet applied. For example, on a private VLAN used to isolate hotel-room ports from each other, this list would show the uplink port to the router as the operational promiscuous member.