I'd like to supplement the explanation.
In cases where user fees were disputed, the study that the department concerned would conduct on the matter might result in an agreement or negotiation, and that could be beneficial for everyone. If it were established that a given price should be billed rather than another and that the merits of that decision were clarified, I don't see why the industry as a whole should continue to accept the former tariff without discussion. In my view, the decision could very well apply to rail service users as a whole.