[aligned-ibrp-e-07]-In a Document level charge (ibg-21) where the Document level charge tax category code (ibt-102) is "Exempt from tax", the Document level charge tax rate (ibt-103) MUST be 0 (zero).
aligned-ibrp-e-07
cac:AllowanceCharge[cbc:ChargeIndicator=true()]/cac:TaxCategory[normalize-space(cbc:ID)='E'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT']
(xs:decimal(cbc:Percent) = 0)