# BR-CIUS-PT-09

Source: https://xmlvalid.com/rules/BR-CIUS-PT-09

> Each Invoice line (BG-25) shall have a tax scheme.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `cac:InvoiceLine | cac:CreditNoteLine`
- Test: `exists(cac:Item/cac:ClassifiedTaxCategory/cac:TaxScheme/cbc:ID)`

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