Certainly the burden of proof must rest with the air carriers.
On the other hand, they can come out with all sorts of evidence, as I have already said. Now, the consumer is not an expert and does not know the rights and obligations of the carriers, so he or she will not know what to do with them if left to their own devices. So someone has to be able to decide and say whether the evidence provided is reliable, whether the facts are true and whether the arguments are valid.
This is the role of the Canadian Transportation Agency or any other agency, which must be able to decide at the first stage, very easily and very quickly, in order to avoid overly long processing times and too much complexity. Above all, travellers must not be left to their own devices when they take the steps, which is what the carriers are demanding at present. Travellers are not equipped to do this. As Ms. De Bellefeuille said, they find themselves fighting like David against Goliath. They don't have the means to deal with multinationals that have almost unlimited resources.