BR-S-06 A standard-rated allowance must have a VAT rate above zero

"vatCategory": "S", "vatRate": 19

{
  "rule": "BR-S-06",
  "field": "BT-96",
  "severity": "fatal",
  "message": "The document level allowance at allowances[0] uses VAT category S (Standard rated), so its VAT rate (BT-96) must be greater than zero, but it is 0. Category S means VAT is charged, and the rate is what selects which standard-rated breakdown group the adjustment nets into — the standard-rated category is the one category that may appear more than once in BG-23, once per distinct rate. A rate of zero would open a standard-rated group at 0%, which is a contradiction: \"taxed\" and \"at no rate\" cannot both hold.",
  "fix": "Set allowances[0].vatRate to the percentage the adjusted supply is taxed at, as a number (19 for the German standard rate, 7 for the reduced rate). If no VAT applies to this allowance, change allowances[0].vatCategory rather than the rate — Z, E, AE, K, G and O each say something different about why.",
  "example": "\"vatCategory\": \"S\", \"vatRate\": 19",
  "xpath": "/ubl:Invoice/cac:AllowanceCharge[1]/cac:TaxCategory/cbc:Percent",
  "docsUrl": "https://attestwire.com/rules/BR-S-06"
}