# BR-DE-CVD-01

Source: https://xmlvalid.com/rules/BR-DE-CVD-01

> Das Element … "Contract reference" (BT-12) muss übermittelt werden.

- Level: error
- Rule sets: XRechnung 3.0 rules (UBL) 2.6.0
- Context: `(/ubl:Invoice | /cn:CreditNote)[$isCVD]`
- Test: `cac:ContractDocumentReference/cbc:ID[boolean(normalize-space(.))]`

> Das Element … "Contract reference" (BT-12) muss übermittelt werden.

- Level: error
- Rule sets: XRechnung 3.0 rules (CII) 2.6.0
- Context: `/rsm:CrossIndustryInvoice[$isCVD]/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement`
- Test: `ram:ContractReferencedDocument/ram:IssuerAssignedID[boolean(normalize-space(.))]`

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