{
  "id": "UBL-SR-42",
  "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": "Party tax scheme shall occur maximum twice in accounting supplier party",
  "statement_lang": "en",
  "context": "cac:AccountingSupplierParty/cac:Party",
  "test": "(count(cac:PartyTaxScheme) <= 2)",
  "meaning": "The party tax scheme shall occur at most twice in the accounting supplier party. The statement has no period and says shall. It is 71 characters. The flag is fatal. The context is the supplier party. The published test counts cac:PartyTaxScheme and compares with <= 2. The count comparison has a space before <= and a space after it.",
  "fix": "Send at most two party tax schemes on the accounting supplier party.",
  "example_fail": "The accounting supplier party has three party tax schemes.",
  "example_pass": "The accounting supplier party has two party tax schemes, or fewer.",
  "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-42/",
  "source_retrieved": "2026-10-18",
  "last_verified": "2026-10-18"
}