When it has been enabled, this notification makes it possible for an APPN topology application to get asynchronous notifications of local TG control-point to control-point (CP-CP) session state changes, and thus to reduce the frequency with which it polls for these changes. This notification is sent whenever there is a change to the appnLocalTgCpCpSession object but NOT the appnLocalTgOperational object in a row of the appnLocalTgTable. This notification is never sent for appnLocalTgTable row creation or deletion. The notification is more than a simple 'poll me now' indication. It carries both a count of local TG topology changes, and the current CP-CP session state itself. The count of changes allows an application to detect lost notifications, either when polling or upon receiving a subsequent notification, at which point it knows it must retrieve the entire appnLocalTgTable again. This is the same count as used in the appnLocalTgOperStateChangeTrap. A lost notification could indicate a local TG CP-CP session state change or an operational state change. Generation of this notification is controlled by the appnTrapControl object.