# PEPPOL-T16-B13301

Source: https://xmlvalid.com/rules/PEPPOL-T16-B13301

> Element 'cac:IdentityDocumentReference' MUST be provided.

- Level: error
- Rule sets: Peppol Despatch Advice rules 3.5
- Context: `/ubl:DespatchAdvice/cac:Shipment/cac:Consignment/cac:CarrierParty/cac:Person`
- Test: `cac:IdentityDocumentReference`

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