# ibr-sr-42

Source: https://xmlvalid.com/rules/ibr-sr-42

> Party tax scheme MUST occur maximum twice in accounting supplier party

- Level: error
- Rule sets: PINT Billing rules 1.1.3, PINT Billing rules (as shipped with PINT AE) 1.0.4
- Context: `cac:AccountingSupplierParty/cac:Party`
- Test: `(count(cac:PartyTaxScheme) <= 2)`

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