National Pension Act Article 18

The insured person or the beneficiary is not allowed to request payments unless the contingencies happen after the insurance takes effect and before the ending or termination of the insurance. However, requests for old age pension payment or mentally/physically disability basic guaranteed pension payment are not included.
中文原文 國民年金法第18條
被保險人非於保險效力開始後、停止或終止前,發生保險事故者,被保險人或其受益人不得依本法規定,請領保險給付。
但請領老年年金給付或身心障礙基本保證年金者,不在此限。

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