Formula One drivers are set for a dispute with their governing body, the FIA, if they go ahead with plans to ditch the mandatory HANS safety system at next month's Australian Grand Prix.

Several drivers have complained about the device, which is designed to protect them in a head-on collision, because it has been deemed dangerous in other impacts and has also caused bruising during pre-season test sessions.

World champion Michael Schumacher said: "For me, I am happy because I feel quite comfortable with it - but I do not think it should be obligatory and, as long as people feel uncomfortable, I feel we should not force them to race with it."

The FIA are taking a firm stance on the matter and warn that they will refuse to back down from its mandatory introduction, even if drivers claim it is dangerous to race with in Australia.

The FIA are unconcerned about a possible driver boycott. However, it is understood that the new device has created a problem with drivers' insurance and that could prevent the system being forced through in time for the season-opening event on March 9.

An insider at one team said: "It is not yet cleared up because there is a problem with administering blame if an incident occurred - so I am not sure whether the FIA can force the drivers to wear it at the moment."