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Formula 1 chiefs have failed to reach an agreement on the 2017 engine regulations following meetings on Tuesday at Biggin Hill, Autosport has learned.

The Strategy Group and F1 Commission convened to discuss the rules in a bid to get a solution ahead of Saturday's deadline to have plans for 2017 finalised.

FIA president Jean Todt wants to address the cost, availability of supply, noise and performance convergence of F1 engines.

Autosport understands a proposal on those four points was agreed by a majority in the morning Strategy Group meeting.

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That proposal was then put forward to the F1 Commission, which met in the afternoon, but a final decision was not made.

It is believed the specifics of the guarantee of supply and the cost of the units are the points proving to be contentious.

The manufacturers are expected to discuss the proposal again before putting an alternative forward later this week.

If changes to the proposal are made, it would require approval by the Strategy Group before going back to the F1 Commission.

It is thought an e-vote could take place in both instances to speed up the process.

Regarding the new aerodynamic regulations for 2017, it is understood these will be in place as agreed earlier this month.