tokens: ['The', 'IRIPOI', 'present', 'in', 'the', 'SMF', 'shall', 'generate', 'xIRI', 'when', 'it', 'detects', 'the', 'following', 'specific', 'events', 'or', 'information', '', 'PDU', 'session', 'establishment', '', 'PDU', 'session', 'modification', '', 'PDU', 'session', 'release', '', 'Start', 'of', 'interception', 'with', 'an', 'established', 'PDU', 'session', 'The', 'PDU', 'session', 'establishment', 'xIRI', 'is', 'generated', 'when', 'the', 'IRIPOI', 'present', 'in', 'the', 'SMF', 'detects', 'that', 'a', 'PDU', 'session', 'has', 'been', 'established', 'for', 'the', 'target', 'UE', 'The', 'PDU', 'session', 'modification', 'xIRI', 'is', 'generated', 'when', 'the', 'IRIPOI', 'present', 'in', 'the', 'SMF', 'detects', 'that', 'a', 'PDU', 'session', 'is', 'modified', 'for', 'the', 'target', 'UE', 'The', 'PDU', 'session', 'release', 'xIRI', 'is', 'generated', 'when', 'the', 'IRIPOI', 'present', 'in', 'the', 'SMF', 'detects', 'that', 'a', 'PDU', 'session', 'is', 'released', 'for', 'the', 'target', 'UE', 'The', 'start', 'of', 'interception', 'with', 'an', 'established', 'PDU', 'session', 'xIRI', 'is', 'generated', 'when', 'the', 'IRIPOI', 'present', 'in', 'a', 'SMF', 'detects', 'that', 'interception', 'is', 'activated', 'on', 'the', 'target', 'UE', 'that', 'has', 'an', 'already', 'established', 'PDU', 'session', 'in', 'the', 'GS', 'When', 'a', 'target', 'UE', 'has', 'multiple', 'PDU', 'sessions', 'this', 'xIRI', 'shall', 'be', 'sent', 'for', 'each', 'PDU', 'session', 'with', 'a']