18 is presumed to be the legal minimum age for compulsory military service; 16-17 is the presumed legal minimum age for voluntary service.
Registration requirement at age 17, the legal minimum age for voluntary military service; 18 is the legal minimum age for compulsory military service (6 months), or optionally, alternative civil/community service (9 months); males 18 to 50 years old in the militia or inactive reserve are subject to compulsory service; in a January 2012 referendum, a majority of Austrians voted in favor of retaining the system of compulsory military service (with the option of alternative/non-military service) instead of switching to a professional army system.
