Australian Grand Prix Corporation chairman Paul Little on Wednesday refused to divulge what discussions took place between race organisers and government authorities before Ferrari and AlphaTauri, were allowed into Australia.

Mr Little said there was no conspiracy theory and stressed that at all times the Australian Grand Prix Corporation had followed the guidelines laid down by health authorities and the federal government.

Asked if lobbying had taken place, Mr Little said the issues of travel restrictions were sensitive.

He said it was "stretching the truth" to suggest pressure had been mounted before the government made its initial ruling on travellers from Italy, which stopped short of an outright ban. "There's no conspiracy there," Mr Little said.