# PEPPOL-T01-B05501

Source: https://xmlvalid.com/rules/PEPPOL-T01-B05501

> Element 'cbc:CompanyID' MUST be provided.

- Level: error
- Rule sets: Peppol Order rules 3.7
- Context: `/ubl:Order/cac:BuyerCustomerParty/cac:Party/cac:PartyTaxScheme`
- Test: `cbc:CompanyID`

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