Le Mans winner Peugeot has dropped its protest against main rival Audi's R15 TDI.
The French manufacturer had believed that flaps and appendages fixed to the R15's front wings were in violation of the rule that parts of the bodywork cannot be fitted with the sole purpose of generating downforce.
When Le Mans organiser the ACO declared the Audi legal, Peugeot announced that it would take the matter to the FIA, but it has now issued a statement saying that it has dropped the protest in favour of working with the ACO to ensure that grey areas such as this were resolved in future regulations.
"The ACO has announced its intention to develop its communication with all the manufacturers involved in the Le Mans Series, the Le Mans 24 Hours and the Asian Le Mans Series," said the Peugeot statement.
"This communication will ensure transparency between all the discipline's players, which is key to guaranteeing the spirit of endurance racing.
"As a consequence, Peugeot Sport has decided to withdraw its appeal with immediate effect."
After rejecting Peugeot's original protest during the Le Mans weekend, ACO president Jean-Claude Plassart had admitted that the nature of the event's rules meant such rows were always possible.
"The Le Mans regulations are not always as precise as perhaps they should be, but we don't want all the cars to be the same," he said. "The teams interpret the regulations and the ACO arbitrates."