# aligned-ibrp-059

Source: https://xmlvalid.com/rules/aligned-ibrp-059

> Invoice lines (ibg-25) MUST have one and only one classified tax category (ibt-151).

- Level: error
- Rule sets: PINT A-NZ rules (Australia and New Zealand) 1.1.3
- Context: `cac:InvoiceLine | cac:CreditNoteLine`
- Test: `(count(cac:Item/cac:ClassifiedTaxCategory) = 1)`

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