[ibr-163-ae]-In Line VAT information (IBG-30) where Invoiced item VAT category code (IBT-151) is 'Exempt', VAT Line amount [BTAE-08] shall not be there.
ibr-163-ae
cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory[normalize-space(cbc:ID) = 'E'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT'] | cac:CreditNoteLine/cac:Item/cac:ClassifiedTaxCategory[normalize-space(cbc:ID) = 'E'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT']
not(cbc:TaxAmount)