# ibr-sr-62

Source: https://xmlvalid.com/rules/ibr-sr-62

> Despatch advice line reference (ibt-184) 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:DespatchLineReference | cac:CreditNoteLine/cac:DespatchLineReference`
- Test: `(count(cac:DocumentReference) <= 1)`

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