# PEPPOL-T16-B24001

Source: https://xmlvalid.com/rules/PEPPOL-T16-B24001

> Element 'cbc:ID' MUST contain value 'NA'.

- Level: error
- Rule sets: Peppol Despatch Advice rules 3.5
- Context: `/ubl:DespatchAdvice/cac:DespatchLine/cac:Shipment/cbc:ID`
- Test: `normalize-space(text()) = 'NA'`

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