Red Bull has questioned the legality of Mercedes' rear brake ducts. FIA reacted by sending out a new Technical Directive (TD 014/20) to clarify what's allowed. It forces Mercedes to make modifications to avoid trouble at Melbourne.

AMuS (in Germany): https://t.co/26emFXAzdv pic.twitter.com/Okydx9lBaM

— Tobi Grüner 🏁 (@tgruener) March 10, 2020