That's one of the concerns those of us in the field have right now. The process to review or challenge the theory exams is either outdated or non-existent. A number of my fellow instructors and I have concerns about the subjects covered in the exam. Obviously, the content of the exam isn't public.
To give you a sense of the situation, I'll give you an example. I am an authorized agent for Transport Canada, and my job is to invigilate exams. I had to be fingerprinted by the RCMP. I have a file. I know that I will be held criminally responsible if anything were to occur, but I would like Transport Canada to invite me to take part in an exam review committee. Many of us in the field are concerned about the subjects covered in theory exams and their updating. On both the private and commercial sides, students are discouraged for the simple reason that certain subjects are now out of step with current practice and standards.