When the monitoring period has been completed, {HEAD ~ data evaluation} then occurs via {TAIL ~ step} 68 
occurs via
When the monitoring period has been completed , { HEAD ~ data evaluation } then occurs via { TAIL ~ step } 68
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH