{
  "id": "BR-56",
  "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": "Each Seller tax representative party (BG-11) shall have a Seller tax representative VAT identifier (BT-63).",
  "statement_lang": "en",
  "context": "cac:TaxRepresentativeParty",
  "test": "exists(cac:PartyTaxScheme[cac:TaxScheme/(normalize-space(upper-case(cbc:ID)) = 'VAT')]/cbc:CompanyID)",
  "meaning": "Each Seller tax representative party (BG-11) must have a Seller tax representative VAT identifier (BT-63). The message says \"shall have\" and starts with \"Each\". It ends with a period. It does not say \"shall contain\". The context is the tax representative party. The published test checks that a party tax scheme company id exists when the tax scheme id is VAT. The tax-scheme comparison has spaces around =. It is not the form with no space before =. The test does not compare the company id to a value.",
  "fix": "On the seller tax representative party, send a seller tax representative VAT identifier (BT-63) under a tax scheme whose id is VAT.",
  "example_fail": "A tax representative party has no company id on a VAT tax scheme.",
  "example_pass": "That party has a company id on a tax scheme whose id is VAT.",
  "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-56/",
  "source_retrieved": "2026-10-18",
  "last_verified": "2026-10-18"
}