# BR-AA-06

Source: https://xmlvalid.com/rules/BR-AA-06

> In a Document level allowance (BG-20) where the Document level allowance VAT category code (BT-95) is "Lower rate" the Document level allowance VAT rate (BT-96) shall be greater than zero.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `cac:AllowanceCharge[cbc:ChargeIndicator='false']/cac:TaxCategory[normalize-space(cbc:ID)='AA' or normalize-space(cbc:ID) = 'RED' or normalize-space(cbc:ID) = 'INT']`
- Test: `(cbc:Percent) > 0`

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