[UBL-CR-557]-A UBL invoice should not include the InvoiceLine AllowanceCharge PerUnitAmount
UBL-CR-557pxs-taxdata:TaxData/pxs-taxdata:ReportedTransaction/pxs-taxdata:ReportedDocumentnot(pxs-taxdata:DocumentLine/cac:AllowanceCharge/cbc:PerUnitAmount)