You must undertake a medical examination, and it must be performed by one of the Australian High Commission's recognised doctors. The results are valid for 12 months - the cost of the medical examination will be paid by the Australia Awards Pakistan office. A medical letter will be generated by the Australian Department of Immigration and Citizenship (DIAC), which will be sent to you by the Australia Awards Pakistan office. This letter will give full details on how to go about conducting your medical exam.