[ibr-124-ae]-VAT point date [IBT-007] MUST not be there when invoice type code (IBT-003) is 'credit note' or 'Credit note related to goods or services'.
ibr-124-ae/ubl:Invoice | /cn:CreditNotenot((cbc:InvoiceTypeCode | cbc:CreditNoteTypeCode) = "381" or (cbc:InvoiceTypeCode | cbc:CreditNoteTypeCode) = "81") or not(cbc:TaxPointDate)