Formula 1 drivers will have to adhere to a stricter definition of the 'one move' defensive rule from this weekend's Korean Grand Prix as part of a process that is likely to put it formally into the sporting regulations next year, AUTOSPORT can reveal.

There is currently no official definition in the rules about what constitutes a legitimate defensive move - with the matter currently only governed by Article 16.1 of the Sporting Regulations.

This article states that drivers can be punished for causing an 'incident' - which includes if he has "illegitimately prevented a legitimate overtaking manoeuvre by a driver."

Despite the 'one move' rule being mentioned in the rules, there is no proper definition of what it constitutes – and what a driver can do after he has used his single manoeuvre.

However, there is an unwritten rule that if a driver returns to the racing line after blocking the inside of a corner, he must leave enough space for his rival on the outside.

Although enforcement of the one move rule has worked for many years, the issue was thrust back into the spotlight at the Italian Grand Prix when Michael Schumacher vigorously defended his position against Lewis Hamilton.

Despite not being given a penalty for what some believed was driving that pushed the limits of the regulations, there were times when he was reminded by race control to leave enough space for Hamilton.

Following the Monza events, moves were made to re-examine the one move rule – and it has subsequently been approved by the FIA Sporting Working Group that it should become a part of the regulations.

With input from the Grand Prix Drivers' Association to put together a rule that the drivers are happy with, sources have confirmed that the one move rule will now be put forward for ratification by the FIA World Motor Sport Council so that it can be put into the 2012 F1 Sporting Regulations.

The wording will confirm that drivers can make one move to defend their position, and must then leave at least one full car's width of asphalt on the outside (which does not include the kerb) if they return to their racing line.

Even though this definition is not yet in the regulations, AUTOSPORT understands that the FIA will adopt this viewpoint as a benchmark from this weekend's event in Korea.