Formula One teams have written to the sport's powerbrokers in what they see as a final attempt to break a deadlock over next year's rules and prevent a damaging split.
The Formula One Teams Association says it's time, in the interests of the sport, to seek to compromise and bring an urgent conclusion to the protracted debate regarding the 2010 world championship.
The letter to the International Automobile Federation president Max Mosley and Formula One's commercial supremo Bernie Ecclestone says it's a significant movement from the teams.
It says all of them have clearly stated a willingness to commit to the sport until the end of 2012.
The deadline for five of the FOTA member teams to make their 2010 championship entries unconditional is Saturday, UKT (Friday NZT).