[ibr-tdd-56] – The cac:PayerFinancialAccount element MUST NOT contain elements other than cbc:ID (BT-091).
ibr-tdd-56/pxs:TaxData/pxs:ReportedTransaction/pxs:ReportedDocument/cac:PaymentMeans/cac:PaymentMandate/cac:PayerFinancialAccountcount(*[not(self::cbc:ID)]) = 0