As long as you can establish a case that your problem will affect your performance in the HSC exams (which implies the need for relevant evidence/documentation), you can definitely apply for illness and misadventure. Keep in mind that you can still sit the HSC exam(s) for which you are requesting consideration. If your application is upheld, and you are able to sit the exam(s),you will receive either your moderated school Assessment Mark or your actual Examination Mark – whichever is higher.