Here's the official communication released by the CIK announcing the new design.
"After thorough on-track testing, in varied situations reflecting race conditions as closely as possible, the CIK-FIA has now validated the new definition of the front fairing mounting kit in a bid to institute greater sportsmanship and respect in karting Competitions by punishing bad behaviour.
As from Monday 4 May 2015, the front fairing mounting kit as defined in CIK-FIA Bulletin N° 40 – 04/05-2015 must therefore be used on all categories of karts taking part in CIK-FIA Competitions and in all other international Competitions.
For further information, please refer to CIK-FIA Bulletin N° 40 – 04/05-2015, which cancels and replaces the previous version. (see attachment)"