[UBL-CR-171]-A UBL invoice should not include the AccountingSupplierParty Party PartyTaxScheme ExemptionReasonCode
UBL-CR-171
/ubl:Invoice | /cn:CreditNote
not(cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme/cbc:ExemptionReasonCode)