F1 race director Charlie Whiting had written to teams ahead of qualifying in Melbourne to let them know that from the season-opener he would be enforcing a long-written rule.

He made it clear that Article 1.2 of Chapter 3 of the International Sporting Code is very clear about what is and is not allowed by all drivers of open cockpit cars.

It states: "Any tear-offs attached to visors may not be thrown onto the track or the pitlane."

The move prompted some surprise from teams, and it is understood that the matter was discussed in Sunday's morning meeting between bosses and the FIA.

Sources suggest that it has been agreed by teams for the visor tear-off clampdown to be delayed until the start of the European season so that F1's teams and helmet manufacturers can come up with a solution that does not cause too much inconvenience.

It is understood that the matter was prompted by teams' concerns about tear off strips getting lodged in brake ducts and radiators – which could potentially cause car problems.

It is also understood that the FIA is evaluating a relaxing of F1's radio clampdown from the Australian GP to allow more freedom for teams to discuss team strategies.

A final decision is expected shortly before the Melbourne race.