# ibr-179-ae

Source: https://xmlvalid.com/rules/ibr-179-ae

> Buyer VAT identifier (IBT-048) MUST occur maximum once

- Level: error
- Rule sets: PINT AE rules (United Arab Emirates) 1.0.4
- Context: `cac:AccountingCustomerParty/cac:Party`
- Test: `count(cac:PartyTaxScheme/cbc:CompanyID) <=1`

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