tokens: ['', '', 'configuration', 'change', 'serviceStop', '', '', 'IP', 'flow', 'terminationFrom', 'Service', 'Stop', 'in', '', 'ChangeCondition', 'AVP', 'dCCATimeThresholdReached', '', '', 'DCCA', 'quota', 'reauthorization', 'dCCAVolumeThresholdReached', '', '', 'DCCA', 'quota', 'reauthorization', 'dCCAServiceSpecificUnitThresholdReached', '', '', 'DCCA', 'quota', 'reauthorization', 'dCCATimeExhausted', '', '', 'DCCA', 'quota', 'reauthorization', 'dCCAVolumeExhausted', '', '', 'DCCA', 'quota', 'reauthorization', 'dCCAValidityTimeout', '', '', 'DCCA', 'quota', 'validity', 'time', 'QVT', 'expiry', 'reserved', '', '', 'reserved', 'due', 'to', 'no', 'use', 'case', '', 'old', 'return', 'Requested', 'is', 'covered', 'by', '', 'dCCAReauthorisationRequest', '', '', 'DCCA', 'quota', 'reauthorization', 'request', 'by', 'OCS', 'dCCAContinueOngoingSession', '', '', 'DCCA', 'failure', 'handling', 'CCFH', '', 'continue', 'IP', 'flow', 'dCCARetryAndTerminateOngoingSession', '', '', 'DCCA', 'failure', 'handling', 'CCFH', '', 'terminate', 'IP', 'flow', 'after', 'DCCA', 'retry', 'dCCATerminateOngoingSession', '', '', 'DCCA', 'failure', 'handling', '', 'terminate', 'IP', 'flow', 'cGISAIChange', '', '', 'bearer', 'modification']