# DT-CIUS-PT-003_cn

Source: https://xmlvalid.com/rules/DT-CIUS-PT-003_cn

> The BT-3 only allows the following values: 381, NC.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `//cn:CreditNote/cbc:CreditNoteTypeCode`
- Test: `(matches(.,'^([A-Z0-9]{2,3})$') and contains('381,NC,', concat(normalize-space(.), ',')))`

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