# F-LIB078

Source: https://xmlvalid.com/rules/F-LIB078

> There must be a StartDate if you have a StartTime

- 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:StartTime) and (not(cbc:StartDate) or cbc:StartDate = '')`

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