GB – ConsumptionOnBillLastBillZero 
Checks the value on the previous bill is zero, then checks the value of this bill.
If there is consumption (not necessarily cost), the Validator will fail.
Validator Set Up
Variables
There are no Variables for this Validator
Failure Prompt
Consumption on bill when last bill has zero consumption: FAILED - name of the Validator
'actualDailyConsumption=167.095238' - The consumption on this bill divided by the amount of days in the bill
'prevBillConsumption=0.00' - Show the consumption on the previous bill is zero