[UBL-CR-448]-A UBL invoice should not include the PaymentMeans PaymentMandate ValidityPeriod
UBL-CR-448
pxs-taxdata:TaxData/pxs-taxdata:ReportedTransaction/pxs-taxdata:ReportedDocument
not(cac:PaymentMeans/cac:PaymentMandate/cac:ValidityPeriod)