[SCH-TSR-18] The layout of the certificate subject CN is not a valid Peppol Seat ID
SCH-TSR-18
/tsr:TransactionStatisticsReport/tsr:Header/tsr:ReporterID
(@schemeID='CertSubjectCN' and matches(normalize-space(.), $re_seatid)) or not(@schemeID='CertSubjectCN')