The Act Governing Preferential Treatment for Recalled Reservists Article 3

Paragraph 1The recall stipulated in this Act means the call-up for participating in active duty for recall training or a special recall to active duty in barracks for a certain period of time in accordance with the Act of Military Service System or other relevant laws.Paragraph 2The special recall mentioned in the preceding paragraph is limited to the enforced active service replacement of reservists at ordinary time, which is stipulated in Paragraph 2, Article 37 of the Act of Military Service System. However, it is not applicable to the case of volunteering to be enrolled in the active service.Paragraph 3The certain period of time mentioned in Paragraph 1 shall be announced by the Ministry of National Defense according to military needs.
中文原文 後備軍人召集優待條例第3條
本條例所定召集,為依兵役法或其他法律,接受教育召集及臨時召集入營服現役達一定期間以上者。
前項臨時召集,以後備軍人應兵役法第三十七條第二款所定平時為現役補缺之召集為限。
但依法志願再服現役者,不適用之。
第一項所定一定期間,由國防部視軍事需要公告之。

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