{
  "id": "UBL-SR-27",
  "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": "Payment means text shall occur maximum once",
  "statement_lang": "en",
  "context": "cac:PaymentMeans",
  "test": "(count(cbc:PaymentMeansCode) <= 1)",
  "meaning": "The payment means text shall occur at most once. The statement has no period, says shall, and says text. It is 43 characters. The flag is fatal. The context is cac:PaymentMeans. The published test counts cbc:PaymentMeansCode. It does not count a text element. The comparison has a space before <= and a space after it.",
  "fix": "Send at most one payment means code.",
  "example_fail": "The payment means has two payment means codes.",
  "example_pass": "The payment means has one payment means code, 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-27/",
  "source_retrieved": "2026-10-18",
  "last_verified": "2026-10-18"
}