diff --git a/src/SOL005/NSPerformanceManagementNotification/definitions/SOL005NSPerformanceManagementNotification_def.yaml b/src/SOL005/NSPerformanceManagementNotification/definitions/SOL005NSPerformanceManagementNotification_def.yaml
index be28039093756bdafa425fd8aa651714c1880b1d..11bebfd0b240af1565de4657e3557e8c641a4299 100644
--- a/src/SOL005/NSPerformanceManagementNotification/definitions/SOL005NSPerformanceManagementNotification_def.yaml
+++ b/src/SOL005/NSPerformanceManagementNotification/definitions/SOL005NSPerformanceManagementNotification_def.yaml
@@ -78,6 +78,9 @@ definitions:
   ThresholdCrossedNotification:
     description: >
       This type represents a notification that is sent when a threshold has been crossed.
+      NOTE:	The timing of sending this notification is determined by the capability of 
+      the producing entity to evaluate the threshold crossing condition.
+      The notification shall be triggered by the NFVO when a threshold has been crossed.
     type: object
     required:
       - id