[aligned-ibrp-e-06]-In a Document level allowance (ibg-20) where the Document level allowance tax category code (ibt-95) is "Exempt from tax", the Document level allowance tax rate (ibt-96) MUST be 0 (zero).
aligned-ibrp-e-06
cac:AllowanceCharge[cbc:ChargeIndicator=false()]/cac:TaxCategory[normalize-space(cbc:ID)='E'][cac:TaxScheme/normalize-space(upper-case(cbc:ID))='VAT']
(xs:decimal(cbc:Percent) = 0)