[IBR-074-OM] - Either both or neither Charge base amount (IBT-142) and percentage (IBT-143) MUST be provided
IBR-074-OMubl:Invoice/cac:InvoiceLine/cac:AllowanceCharge | cn:CreditNote/cac:CreditNoteLine/cac:AllowanceCharge(cbc:BaseAmount and cbc:MultiplierFactorNumeric) or (not(cbc:BaseAmount) and not(cbc:MultiplierFactorNumeric))