{
  "id": "UBL-SR-51",
  "country": "EU",
  "syntax": "ubl",
  "group": "syntax",
  "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 address can only have one third line.",
  "statement_lang": "en",
  "context": "//cac:PostalAddress | //cac:Address",
  "test": "not(cac:AddressLine) or count(cac:AddressLine) = 1",
  "meaning": "An address can have only one third line. The statement ends with a period and does not say shall. It is 40 characters. The flag is fatal. The context starts with // and names a postal address or an address. The published test allows no address line or exactly one. It writes = 1 and does not use <=.",
  "fix": "Send at most one address line on an address.",
  "example_fail": "An address has two address lines.",
  "example_pass": "An address has one address line, or none.",
  "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/UBL-SR-51/",
  "source_retrieved": "2026-10-18",
  "last_verified": "2026-10-18"
}