fatalEN 16931syntax binding ruleUBL
VAT exemption reason text shall occur maximum once
'VAT exemption reason text' appears more than once, and this profile allows it at most once.
Keep the single correct 'VAT exemption reason text' and delete the rest. Repeating an element that the semantic model treats as singular is usually a serialiser writing every value it has instead of choosing one.
UBL — context cac:TaxSubtotal
(count(cac:TaxCategory/cbc:TaxExemptionReason) <= 1)