# CII-DT-027

Source: https://xmlvalid.com/rules/CII-DT-027

> FormattedIssueDateTime should not be present

- Level: error
- Rule sets: EN 16931 rules (CII) 1.3.17, EN 16931 rules 1.3.16 (CII)
- Context: `//ram:*[ends-with(name(), 'ReferencedDocument')]`
- Test: `not(ram:FormattedIssueDateTime) or self::ram:InvoiceReferencedDocument`

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