Allowance/charge percentage MUST be provided when allowance/charge base amount is provided.
PEPPOL-EN16931-R042pxs-taxdata:TaxData/pxs-taxdata:ReportedTransaction/pxs-taxdata:ReportedDocument/cac:AllowanceCharge[not(cbc:MultiplierFactorNumeric) and cbc:BaseAmount] | pxs-taxdata:DocumentLine/cac:AllowanceCharge[not(cbc:MultiplierFactorNumeric) and cbc:BaseAmount]false()