# BR-FXEXT-01

Source: https://xmlvalid.com/rules/BR-FXEXT-01

> If the Invoice Free Text subject Code (BT-21) is specified, either the coded message free text (BT-X-5) or the message free text (BT-22) must be specified, or both. If both BT-X-5 and BT-22 are specified, both must have the same meaning.

- Level: error
- Rule sets: Factur-X EXTENDED rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:ExchangedDocument/ram:IncludedNote[ram:SubjectCode]`
- Test: `(ram:ContentCode) or (ram:Content)`

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