[BR-CO-25]-In case the Amount due for payment (BT-115) is positive, either the Payment due date (BT-9) or the Payment terms (BT-20) shall be present.
Stored validation assertion
(number(//ram:DuePayableAmount) > 0 and ((//ram:SpecifiedTradePaymentTerms/ram:DueDateDateTime) or (//ram:SpecifiedTradePaymentTerms/ram:Description))) or not(number(//ram:DuePayableAmount)>0)