Is new BB10.3 theme necessary for Built for Blackberry apps?

I don't know whether this forum is right for this question but I hope that someone may know the answer.
I am an app developer and have a Built for BlackBerry app.
Will pushing update to app without the new 10.3 theme will make the app lose B4BB certification or not?
I have asked the same question on BlackBerry's own forum but nobody has replied to it.

At this point, I don't think so. They seem to accept almost anything. Could be wrong though.