Thus, detection of the existence of a vulnerability is used to indicate noncompliance with an associated requirement while {HEAD ~ absence} of a vulnerability is used to indicate {TAIL ~ compliance} with the associated requirement 
Thus , detection of the existence of a vulnerability is used to indicate noncompliance with an associated requirement while { HEAD ~ absence } of a vulnerability is used to indicate { TAIL ~ compliance } with the associated requirement
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH