The spying row has added spice to this season's F1 championship

McLaren were found guilty of possessing confidential Ferrari documents, but it was decided the information had not been used to improve their car.

But FIA president Max Mosley said "the importance of public confidence in the outcome" meant an appeal must be heard.

Ferrari will now be given the right to present a full case.

That had not been the case at last month's initial hearing of the FIA world motorsport council, said Italian motorsport authority CSAI, because the team had been present only as observers.

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It was a letter from CSAI, expressing its unease at the decision not to punish McLaren, that prompted a review by Mosley.

McLaren are not impressed with the FIA's decision to look into the case again, with the team facing a renewed threat of a points deduction or even a ban from the championship if found guilty.

"We're not aware of any new information or arguments that have arisen since the meeting of the world motorsport council and therefore assume that these same materials will now be considered by the FIA international court of appeal," read a McLaren statement.

"Whilst this is both disappointing and time-consuming, McLaren are confident that the FIA international court of appeal will also exonerate McLaren.

"In the meanwhile, we continue to focus on our current world championship programme."

Ferrari welcomed the FIA's decision as "a sensible one".

A spokesman said: "The FIA has correctly noted that Ferrari, as the injured party, should be able to enjoy all the rights of a party in a trial and that was not the case in the audience of the world council."

McLaren driver Lewis Hamilton leads the world championship by seven points from team-mate Fernando Alonso, with Ferrari's Kim Raikkonen a further 13 points behind.

McLaren are 19 points ahead of Ferrari in the constructors' title chase.

The row blew up when McLaren chief designer Mike Coughlan was found to have nearly 800 pages of Ferrari documents in his house.

Coughlan has since been suspended by McLaren.

Ferrari believe Coughlan received the documents from their now-sacked performance director Nigel Stepney, who says he is innocent.