A fault in this box occurs if you demonstrate a lack of understanding of the Highway Code (and related safety issues). If, for example, you are riding on a dual carriageway and there is a sign showing that the lane you are in is closing, but you fail to react until prompted by the examiner, then this box may be used. It is, however, unusual for this box to be used to record any faults as they are often covered by other boxes elsewhere on the test report.