# PEPPOL-T19-B11702

Source: https://xmlvalid.com/rules/PEPPOL-T19-B11702

> Value MUST be part of code list 'Recommendation 20, including Recommendation 21 codes - prefixed with X (UN/ECE)'.

- Level: error
- Rule sets: Peppol Catalogue rules 3.5
- Context: `/ubl:Catalogue/cac:CatalogueLine/cbc:ContentUnitQuantity`
- Test: `not(@unitCode) or (some $code in $clUNECERec20 satisfies $code = @unitCode)`

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