Jean Todt on Sunday insisted F1 will not be repealing its four-cylinder engine rules for 2013.
Amid the powerful opposition of Bernie Ecclestone and Ferrari, the FIA president told reporters in Turkey that the regulations were rubber-stamped unanimously by the World Motor Sport Council.
F1 chief executive Ecclestone, however, has grave fears, admitting he is worried F1 could sound like the piddling GP3 cars if the sport follows through its 'green' agenda.
Todt said the only way the incoming rules could be scrapped is if "dramatic evidence" is brought forward at the next FIA meeting.
At the moment there is no reason to reconsider it
"At the moment there is no reason to reconsider it," the Frenchman insisted.
Ecclestone meanwhile denied he is at loggerheads with Todt but issued a backhanded compliment when considering the FIA chief's rise through the ranks from Peugeot in rallying to the top job at Ferrari.
"I was the one who took him out of Peugeot and put him in Ferrari," said the Briton. "We have a very good relationship."