{"api_version":"1","rule":{"code":"CODE-001","title":"Currency codes","description":"Document and tax accounting currencies must use the ISO 4217 list pinned by the EN 16931 validation artefacts.","severity":"error","ruleset":"code-lists","ruleset_version":"2026.08.3","profiles":["full","simplified"],"effective_from":"2026-08-15","effective_to":null,"source":{"id":"en16931-validation","name":"CEN/TC 434 \u2014 EN 16931 validation artefacts 1.3.16","url":"https://github.com/ConnectingEurope/eInvoicing-EN16931/releases/tag/validation-1.3.16","accessed":"2026-08-15"},"applicability":"See the rule description and selected invoice or technical profile.","remediation":"Add or correct the referenced structured invoice data.","rule_url":"/rules/CODE-001"}}