3830460 - [New TA Service]Which condition can be used to configure an audit rule that limits the number of days in a Trip Itinerary added to an expense report?

We would like create one audit rule to check if user using expense type "Laundry" and has trip itineraries added to this report, the number of days for any trips should not less than 5 days. The audit rule should be triggered at the time when user saving the report entry.
May I know which condition should be included in this audit rule?

Conditions in audit rule to check the number of days in a Trip Itinerary added to an expense report , KBA , CON-EXP-ADM-TA , Travel Allowance , Problem