# ibr-sr-23

Source: https://xmlvalid.com/rules/ibr-sr-23

> Seller tax representative tax identifier (ibt-063) MUST occur maximum once, if the Seller has a tax representative

- Level: error
- Rule sets: PINT Billing rules 1.1.3, PINT Billing rules (as shipped with PINT AE) 1.0.4
- Context: `cac:TaxRepresentativeParty`
- Test: `(count(cac:Party/cac:PartyTaxScheme/cbc:CompanyID) <= 1)`

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