# PEPPOL-T16-B18801

Source: https://xmlvalid.com/rules/PEPPOL-T16-B18801

> Element 'cbc:LineID' MUST be provided.

- Level: error
- Rule sets: Peppol Despatch Advice rules 3.5
- Context: `/ubl:DespatchAdvice/cac:DespatchLine/cac:OrderLineReference`
- Test: `cbc:LineID`

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