Males 18-36 years of age may volunteer for military service or must complete 4 months of compulsory military training (or substitute civil service in some cases); women may enlist; women in Air Force service are restricted to noncombat roles; for men born before December 1993, compulsory service (military or civil) is 1 year; for 8 years after discharge, men are subject to training recall four times for periods not to exceed 20 days.
18 is presumed to be the legal minimum age for compulsory military service; 16-17 is the presumed legal minimum age for voluntary service.