# F-LIB033

Source: https://xmlvalid.com/rules/F-LIB033

> PostalZone is mandatory for a StructuredDK address type

- Level: error
- Rule sets: OIOUBL 2.1 Invoice rules (Denmark) 1.17.2, OIOUBL 2.1 Credit Note rules (Denmark) 1.17.2, OIOUBL 2.1 Reminder rules (Denmark) 1.17.2
- Test: `(cbc:AddressFormatCode = 'StructuredDK') and (not(cbc:PostalZone) or normalize-space(cbc:PostalZone) = '')`

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