# BR-DEX-03

Source: https://xmlvalid.com/rules/BR-DEX-03

> Eine Sub Invoice Line (BG-DEX-01) muss genau eine "SUB INVOICE LINE VAT INFORMATION" (BG-DEX-06) enthalten.

- Level: error
- Rule sets: XRechnung 3.0 rules (UBL) 2.6.0
- Context: `/ubl:Invoice[$isExtension]`
- Test: `not(exists(//cac:SubInvoiceLine/cac:Item[ count ( cac:ClassifiedTaxCategory) != 1]))`

Validate a document against these rules: https://xmlvalid.com/validate