Williams and Toyota were disqualified from the Canadian Grand Prix following checks on their cars' brake ducts.
Ralf Schumacher had finished second in a race won by his brother Michael, while the German's Williams team-mate Juan Pablo Montoya was fifth.
Toyota's Cristiano da Matta and Oliver Panis were stripped of eighth and 10th.
The disqualifications gave BAR's Jenson Button third, promoted McLaren's David Coulthard to sixth and gave Jordan debutant Timo Glock seventh.
Just over an hour after the race, Jo Bauer, the technical delegate of motorsport's governing body the FIA, submitted a report to the race stewards.
Bauer said the ducts had been checked on all the cars in parc ferme, and those of Schumacher, Montoya, Da Matta and Panis did not comply with Formula One's technical regulations.
"What has happened is a pity because it has spoiled what was a good race," said Schumacher.
"I'm now thinking 'what have I done to deserve this'. It's cold comfort that Sir Frank Williams called me immediately to tell me he was sorry.
"But breaking a rule is breaking a rule and somebody must be punished for that. I have to accept it, even if it really hurts.
"But I will not bury my head in the sand and I will continue to work hard and remain motivated. The good thing is we quickly have a chance to ease the pain."
Williams technical director Sam Michael admitted: "The front brake ducts of Ralf and Juan Pablo's car are not in accordance with the regulations.
"It was a mistake and it was unintentional. There was no performance gain and no gain for brake cooling because the inlet area was not bigger.
"However, the duct is not in compliance with the technical regulation and we accept the FIA decision."
Toyota said they wanted to appeal against the decision but left it too late.
"After an internal discussion with the relevant personnel,
we intended to appeal against the disqualification imposed by
the stewards of the meeting," said Toyota motorsport president
John Howett in a statement.
"However we were unable to meet the FIA appeal deadline.
"I must stress that the alleged technical infringement
resulted in absolutely no increase in our performance level.
"The brake ducts on our race cars were still within a
generally accepted tolerance level. We reluctantly accept this
unpleasant penalty and must now look to next week's grand prix