Some teams will be forced to rethink their diffusers in time for the next race © Sutton Images Enlarge Related Links Race:

Bahrain Grand Prix Championship:

FIA Formula One World Championship

A number of teams, including McLaren and Renault, will use a different rear diffuser design at the next race in Australia, following a rule clarification by the FIA.

ESPNF1 understands the FIA's ruling will prevent teams adding another layer to the diffuser by exploiting the hole where the external engine starter fits. The cars have all passed scrutineering in Bahrain and their participation in this weekend's grand prix will not be in question. Under the latest clarification the teams are now clear on what will be allowed for the rest of the championship, starting in two weeks time in Melbourne.

Diffusers caused a major stir at the start of the 2009 season when Brawn, Williams and Toyota arrived in Australia with a double-decker design which is now standard on all 2010 cars. This year's ruling is unlikely to create the same kind of furore.