Raikkonen on Ferrari and his future
Ferrari driver Kimi Raikkonen has told BBC Sport he could quit Formula 1 over controversial plans to introduce a budget cap and a two-tier championship.
The sport's governing body, the FIA, wants to limit budgets to £40m in a bid to ease financial pressures on teams and make racing more competitive.
Raikkonen says it may drive him out of F1 when his contract expires in 2010.
"This is not F1 anymore. That's why there is a question mark. We'll see what happens," the Finn said.
FIA president Max Mosley is proposing that teams who operate under the budget cap would have more technical freedom than those who do not.
But teams are opposed to the plan because they feel it would confuse the public.
F1 commercial rights holder Bernie Ecclestone also wants the championship to be awarded to the driver who wins the most races, rather than the current points system.
There are a lot of question marks and nobody seems to know what kind of rules we are going to get
"There are a lot of question marks and nobody seems to know what kind of rules we are going to get," said Raikkonen, who won the world championship in 2007.
He added: "I'm happy where I am now, I have a contract for next year then it's more or less my decision what I want to do.
"We'll see how it goes and how F1 is going. There are a lot of question marks. Nobody seems to know what kind of rules we are going to get.
"I will definitely finish my contract but I'm not in a hurry and we'll wait and see."
Ferrari are the oldest team in F1 but president Luca di Montezemolo says the spending cap could damage the sport if it penalises teams with traditionally bigger budgets.
When asked if Ferrari would still contest F1 if a budget cap were introduced, Raikkonen said: "I don't know. There are a lot of question marks and I'm not the guy to answer those."
"There needs to be a reasonable budget for everybody," he added.
"It would be nice to get close racing; we are getting there now but it still needs to improve.
"But it's hard to put the bigger and smaller teams on the same level as it's very difficult to make everybody happy."
Raikkonen said he did not want to leave Ferrari and that he would not stay in F1 if he did not have a front-running car.
Ferrari made their worst start to a season for 28 years when they failed to win any points in the first three races of 2009.
Raikkonen got the team up and running with sixth place in Bahrain.
Ferrari have introduced a heavily revised car for this weekend's Spanish Grand Prix, but the Finn concedes it will be difficult to re-ignite the defence of their constructors' title with 13 races to go.
"We can win races this year but I'm not so sure we can fight for the championship," said the 29-year-old, whose last victory came a year ago at the 2008 Spanish GP.
"The next few races will show which way we are going to go but we know it is going to be difficult.
"Some teams are faster now than us and it's never going to be easy to catch them up.
"We're not as happy as we were last year but the atmosphere in the team hasn't changed. There is always some motivation - we don't give up that's for sure."
Watch the full interview with Kimi Raikkonen during BBC One's coverage of the Spanish Grand Prix from 1300 BST on Sunday.