As of July 2010, the OUPV NC /100 Ton Masters NC tests have been made more difficult to pass. For one thing there are now 50 Rules of the Road Questions of which you need a 90% to pass.
The big change is the plotting portion of the exam. The plotting portion of the exam used to be 10 questions with a passing grade of 70%. The new test is 20 questions with a passing grade of 90%.
There isn't a device on this world that can measure the indifference I have for that statement.