Data Collection Limits Check 
You can use the DC521 hook point activity to check all operations on the routing, up to and including the current operation, to ensure that the collected data parameters for all associated DC groups do not have a data value that violates the Min/Max limits for the data parameter.
This activity is used with the PRE_COMPLETE hook point for an operation or resource.
Note
If the Collect Data Multiple Times system rule is set to true, Data Collection Limits Check checks all of the collected data for violation of the specified limits, not just the last set of values entered (see Miscellaneous Rules).
End of the note.