Every male Austrian citizen becomes liable for military conscription on his 17th birthday. The enlistment takes place in the calendar year in which his 18th birthday is reached (main enlistment year). However, it is also possible to undergo a military examination in the year before or after. Since the main aim of the military examinations is to determine suitability for military service, they enable a comprehensive picture to be obtained of the health condition of 18-year-old male Austrian citizens. The examination procedure ends with a decision on fitness or unfitness for compulsory military service.