If you're late for class, you're interfering with concentration. Becoming late is considered an unauthorized omission, so every student must not be late more than once per trimester. After that, the rule is that the student arrives at 8:00 the next morning. After 5 reports of unauthorized failure the parents are informed and after 10 of these reports we are obliged to report this to the compulsory education officer. Of course we inform parents about that.