Unplanned Interconnection Outages. Upon detection of an unplanned Interconnection Outage, the ISDs shall immediately notify each other. At the time of notification, the Interconnection Outage could have ceased to exist or could still be persisting. In cases where the Interconnection Outage has ceased to exist, the ISDs will note the occurrence, duration and details of the failure. In cases where the Interconnection Outage is persisting, immediate action shall be taken to localise the fault causing the failure and to identify the Party responsible for clearing the fault. The ISDs shall thereafter and until full restoration of service inform each other every 30 (thirty) minutes, or at mutually agreed upon intervals, of the progress of the repairs. Once the Interconnection service has been fully restored the ISDs will note the Interconnection Outage duration and details of the failure.