The Overseas Compatriot Identity Certificate for Military Service is used for males who reach the age of 18 to undergo military registration at the District Office, and during the conscription age period (from January 1 of the year they turn 19 to December 31 of the year they turn 36) to apply for exit document review.
If the individual does not return to the R.O.C. (Taiwan) during this period, there is no need to reapply annually.