Mosley, the son of former British Union of Fascists leader Oswald Mosley, has been FIA president since 1993.
The 67-year-old, the son of former British Union of Fascists leader Oswald Mosley, has been FIA president since 1993.
Mosley had previously indicated that he would probably step down as FIA president when his latest term ended in October 2009.
The former world rally champion, who is hoping to succeed FIA president Max Mosely was scathing of Piquet Jr's behavior throughout.
The FIA president, who won a High Court case against the News of the World, is in Monza for the Italian Grand Prix.
The FIA president said that Hamilton and Alonso would have been thrown out of the Formula One title race if he had got his way.
It is at odds with FIA president Max Mosley over what the teams see as his autocratic and arbitrary governance of the sport, among a number of other issues.
That followed several hours of talks on Friday between them and later with FIA president Max Mosley as they seek a resolution to the current crisis rocking the sport.
Di Montezemolo again reiterated his opposition to the ban on testing during the F1 grand prix season and said he would be putting across his arguments when he meets Ecclestone and FIA president Jean Todt.
It is not the first time Mosley has promised to stand down as FIA president - in June 2004, he announced he would stand down from his position in October of that year, only to rescind his decision a month later and secure re-election.
"The decision of the World Council was presided over by the FIA president, who was well-known to be in conflict with Briatore, with Mr Mosley having played a leading role in launching the inquiry and its investigation in violation of the principle of separation of the power of the bodies, " its judgment said.
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The International Automobile Federation (FIA) president would be "detained by legal matters", his spokesman said.
The former world champion said Mosley, who held on to his role as the FIA's president -- Formula One's governing body -- after a confidence vote last month, was no longer in a position to lead the sport into the future.
That statement had come after Max Mosley, president of F1's governing body the FIA, had reached a compromise deal with Fota chairman and Ferrari president Luca di Montezemolo and F1 commercial boss Bernie Ecclestone.
But Max Mosley, the president of governing body FIA, said last week the cash needed to match Ecclestone's offer makes a new series economically impossible.
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Formula One boss Bernie Ecclestone told the Times the Bahraini royal family "wouldn't like" the president of governing body the FIA to attend.
Mr Mosley is president of the International Automobile Federation (FIA), the governing body for sports such as Formula 1.
Max Mosley, president of motorsport's governing body the FIA, has repeatedly stressed the need for F1 teams to trim their workforce.
The FIA itself claims Piquet's father Nelson Sr alerted president Max Mosley to the possibility of a plot following last year's race but that, as his son was not willing to make a statement, the FIA could not proceed with an investigation without further evidence.
Mosley had previously maintained the decision of who should be president should reside solely with the members of the FIA despite growing pressure from the rebel teams for a new man to take charge.
Ecclestone said that he and Jean Todt, the president of motorsport's world governing body the FIA, would consult with the teams in Shanghai, China this weekend where the third round of the F1 championship is taking place.
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