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0: registration requirement at age 17, the legal minimum age for voluntary military service; men above the age of 18 are subject to compulsory military service; women may volunteer; compulsory service is for 6 months, or optionally, alternative civil/community service (Zivildienst) for 9 months (2023)
Note 1: as of 2022, women made up about 4% of the military's full-time personnel
Note 2: in a January 2013 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; approximately 40% of those liable to compulsory service have opted in favor of alternative civil/community service