Mr. Stanton, thank you for your question.
Actually, in terms of air navigation services, those were privatized in 1996 through the creation of Nav Canada. It is a fully self-sustaining, privately funded organization. We actually fund those charges through what we pay to Nav Canada. Every flight that overflies Canada in Canadian airspace is charged a levy, according to weight and distance, by Nav Canada. Once it was divested by the crown in 1996, that was fully privatized in terms of the pricing regulation. The safety regulation is still regulated by Transport Canada, as we are.
The rationale for continuing those is basically to protect government and crown revenue. That's the biggest reason we have been given for the perpetuation of many of those fees.