|© AP Photo/Rui Vieira
The FIA's technical directive that FRIC (front and rear interconnected suspension) used on most cars might be illegal has thrown a spanner in the works for most teams ahead of the German Grand Prix.
The suspension systems, used to generate more underbody downforce for more control at speed and when braking, have been implemented to varying degrees by different teams, meaning some benefit from FRIC more than others.
The FIA indicated that it would tolerate its use for the rest of the season if all manufacturers agreed to a ban delay until 2015, but unanimous agreement was always likely to be a tall order.
McLaren, Red Bull, Force India and Caterham have indicated they won't be racing with FRIC at Hockenheim, while runaway championship leader Mercedes, Williams, Lotus and Marussia are reportedly eager to keep it.
They run the risk of docked points if they use FRIC and another team protests.