[ibr-151-ae]-When Invoice type code (IBT-003) is 'Commercial invoice' or 'Credit note', Invoiced item VAT category code (IBT-151) should not only contain 'Exempt from VAT' and/or 'Not subject to VAT'.
ibr-151-ae
/ubl:Invoice | /cn:CreditNote
not((cbc:InvoiceTypeCode = "380" or cbc:InvoiceTypeCode = "381") and not(cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory/cbc:ID != "E" and cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory/cbc:ID != "O"))