Don't you just love those inventive, yet confusing dress codes? There is no such thing. Plus, this shouldn't have been mentioned on the invitation. If it was on an enclosure, the host should have been considerate enough to decode it for you.
So, we will have to guess according to the time of day and location, which is what we usually do. The dress code could be anything from cocktail attire to formal. Let me know the where and when (time of day) and hopefully we can work this out.