BR-CL-22 A VAT exemption reason code must come from the CEF VATEX list

"vatExemptionReasonCodes": { "E": "VATEX-EU-132-1B" }

{
  "rule": "BR-CL-22",
  "field": "BT-121",
  "severity": "fatal",
  "message": "The VAT exemption reason code (BT-121) supplied for category \"E\" is \"NOT-A-VATEX\", which is not in the CEF VATEX list (88 codes). BT-121 is the machine-readable half of the exemption: BT-120 tells a human why no VAT was charged, and this code tells a tax administration which article of the VAT Directive the exemption rests on. Free text, a directive article written out longhand, or a national code that is not in the VATEX list will all fail. Unusually, the comparison is case-insensitive — the schematron upper-cases the value first — so case is the one thing that cannot be the problem here.",
  "fix": "Set vatExemptionReasonCodes[\"E\"] to a VATEX code — for category E that is normally \"VATEX-EU-132-1B\" or another article-specific code such as \"VATEX-EU-132-1A\", since an exempt supply is exempt under a named article. Leave the code unset and supply only vatExemptionReasons text if none of the codes fits.",
  "example": "\"vatExemptionReasonCodes\": { \"E\": \"VATEX-EU-132-1B\" }",
  "xpath": "/ubl:Invoice/cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:TaxExemptionReasonCode",
  "docsUrl": "https://attestwire.com/rules/BR-CL-22"
}