# DT-CIUS-PT-022

Source: https://xmlvalid.com/rules/DT-CIUS-PT-022

> The BT-24 only allows the following value: urn:cen.eu:en16931:2017#compliant#urn:feap.gov.pt:CIUS-PT: followed by the version identifier.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `//ubl:Invoice/cbc:CustomizationID | //cn:CreditNote/cbc:CustomizationID`
- Test: `matches(.,'^urn:cen.eu:en16931:2017#compliant#urn:feap.gov.pt:CIUS-PT:(.{1,10})$')`

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