If "Payment means type code" (BT-81) contains a code for credit transfer (30, 58), "CREDIT TRANSFER" (BG-17) shall be provided.
DE-R-023-1pxs-taxdata:TaxData/pxs-taxdata:ReportedTransaction/pxs-taxdata:ReportedDocument/cac:PaymentMeans[cbc:PaymentMeansCode = (30,58)][$supplierCountryIsDE and $customerCountryIsDE]cac:PayeeFinancialAccount