My question is to the Prime Minister. I refer the Prime Minister to her statement yesterday that she could not stop the industrial action at Qantas using section 431 of the Fair Work Act due to the 'endless legal challenges that would have ensued'. Given that the pilots union and the Transport Workers Union have said they are preparing a legal challenge to the Prime Minister's use of section 424, what new excuse can the Prime Minister now give the parliament for not making a declaration under section 431?