Renault Sport president Jerome Stoll admits there is growing unhappiness with Formula 1 owners Liberty Media as a new Concorde Agreement remains unfinished.
While teams are preparing for the 2019 season in Barcelona, negotiations regarding 2021 continue to drag which means planning for the expected overhaul in both commercial and sporting regulations can't begin.
And as every week and month ticks by, time is increasingly becoming an issue for the French manufacturer.
"We are very much concerned by the evolution of the Concorde Agreement," Stoll was quoted by F1i.com this week. "And we are very much concerned by the fact that Liberty, who is the owner, should decide.
“It is our duty to make the decision happen. We are pushing and I’ve had several discussions with [F1 CEO] Chase Carey. He promised to us that the decision would be taken by late last year, but no decision has been taken.
"I will push as soon as I meet him again - in Melbourne or maybe at the Barcelona test, and I will say, 'Please, what is your planning? When can you take a decision?’ It is very much important for us. It is crucial.”
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The main contention comes from the current top three teams, who see Liberty's plan for a budget cap, reduced costs and other changes as a threat to their position.
"For Mercedes or Red Bull or Ferrari, winning is a must whatever the cost," the Renault president said. "For us, winning is important - but we look at the costs.
"Maybe we are the only car maker who is a generalist car maker and is much more sensible on this financial point."
