The Formula One Teams Association has written to the FIA seeking an 'urgent conclusion' to the ongoing dispute over the regulations for the 2010 F1 season.

In a move which the teams claim 'represents significant movement', the eight remaining FOTA teams - Williams and Force India aside - have contacted the governing body with a series of proposals which it believes could prevent the threat of an F1 breakaway by the current teams.

"We have come to the decision that the time has come when, in the interests of the sport, we must all seek to compromise and bring an urgent conclusion to the protracted debate regarding the 2010 World Championship," the FOTA missive read. "We hope that you will consider that this letter represents significant movement by the teams, all of which have clearly stated a willingness to commit to the sport until the end of 2012.

"We would therefore strongly but respectfully submit that you consider these proposals and seek to avoid the potential departure from Formula One of some important teams. Now is the time to find a reasonable and rapid solution to the outstanding issues."

In its letter, FOTA suggests that it would be prepared to commit to a new version of the Concorde Agreement governing the sport, although changes will be needed to modernise the agreement currently dating back to 1998.

The teams have also hinted that they could sign up to a version of the controversial budget cap if a firm of top independent accountants could be appointed to police it, while they would also be prepared to assist new teams coming into the sport from a technical point of view to ensure there would be no two-tier regulations.

In a response to the teams, FIA chief Max Mosley rejected a request to remove his deadline for teams to lift the conditions placed on their F1 entries from this Friday, but hinted that a compromise could now be close to end the feud.

While stating that it wouldn't be possible to put together a new Concorde Agreement in a short period of time, Mosley called on the teams to commit to the 1998 version in the short term so that discussions could be held on a 2009 Concorde Agreement and any revisions made.

"If we start to modify the governance provisions of the 1998 Concorde Agreement, a lengthy discussion will begin," Mosley wrote. "There is no time left for this because we must answer the remaining applicants for 2010 no later than Friday.

"There are elements in your proposals which we may be able to agree to, but we need time to look at them. Our proposal is therefore that all parties agree to accept the 1998 governance provisions by means of an exchange of letters. We can then negotiate a new 2009 Concorde Agreement under the protection of the 1998 arrangements. We have lived with these for ten years; a few more weeks or months should not cause any difficulty."

Mosley also called on the team's to accept the current budget cap in place prior to possible discussions in future, with FOTA proposals to reduce costs having not provided a 'clear figure' to show teams - or the FIA - the constraints they are working to.

Mosley also confirmed that there would be no two-tier regulations for team's competing in F1 next season, although he said that Cosworth - which will provide engines for Campos, USF1 and Manor - would be allowed to work to 2006 regulations as it has 'neither the time nor the resources to return for 2010'.

The FIA will now send each team a letter to be signed to accept its proposals so that all entries lodged for 2010 become unconditional.