# ibr-111

Source: https://xmlvalid.com/rules/ibr-111

> Item price discount (ibt-147) MUST occur maximum once.

- Level: error
- Rule sets: PINT Billing rules 1.1.3, PINT Billing rules (as shipped with PINT AE) 1.0.4
- Context: `cac:InvoiceLine | cac:CreditNoteLine`
- Test: `(count(cac:Price/cac:AllowanceCharge/cbc:Amount) <= 1)`

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