Act of Military Service for Officers and Non-commissioned Officers of the Armed Forces Article 12

After suspension or retirement, Standing Officers, Standing Non-commissioned Officers shall undergo Reserved Officer Service in accordance with the following regulations:Subparagraph 1 Having served Active Service for less than ten years, will serve First Reserved Service.Subparagraph 2 Having served Active Service for more than 10 years but less than 20 years, or having served Active Service and First Reserved Service totaling to more than 10 years but less than 20 years, will serve Second Reserved Service.Subparagraph 3 Having served Active Service for more than 20 years, or having served Active Service for more than 15 years and reached the age of 60, or having served Active Service and First Reserved Service, Second Reserved totaling to more than 20 years but not reached the retirement age, will serve Third Reserved Service.
中文原文 陸海空軍軍官士官服役條例第12條
常備軍官、常備士官停役或退伍後,依下列規定服預備役:
一、已服現役未滿十年者,服第一預備役。
二、已服現役十年以上未滿二十年,或服現役與第一預備役合計十年以上未滿二十年者,服第二預備役。
三、已服現役二十年以上,或服現役十五年以上且年滿六十歲,或服現役及第一預備役、第二預備役合計二十年以上,未屆滿除役年齡者,服第三預備役。

English translation for reference only; the Chinese text prevails. Not legal advice.