{
  "id": "BR-01",
  "country": "EU",
  "syntax": "ubl",
  "group": "document",
  "severity": "fatal",
  "severity_note": "fatal, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.",
  "spec": "Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL",
  "statement": "An Invoice shall have a Specification identifier (BT-24).",
  "statement_lang": "en",
  "context": "/ubl:Invoice | /cn:CreditNote",
  "test": "normalize-space(cbc:CustomizationID) != ''",
  "meaning": "An invoice must have a specification identifier (BT-24). The published test checks that cbc:CustomizationID is not blank. The official message and the index cell both end with a non-breaking space, a regular space, and a non-breaking space after the period. The stored statement drops that trailing whitespace. The message says \"shall have\". It does not name a VAT breakdown, an invoice line, an allowance, or a charge.",
  "fix": "Fill cbc:CustomizationID with a non-empty specification identifier (BT-24).",
  "example_fail": "CustomizationID is missing or blank.",
  "example_pass": "CustomizationID contains a non-empty value.",
  "example_note": "Illustration of the condition in the official statement. Not an example published by the source.",
  "source_url": "https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/BR-01/",
  "source_retrieved": "2026-10-18",
  "last_verified": "2026-10-18"
}