National Pension Act Article 25

The insured person is entitled to apply for a decrease in insurance payment. Such application is limited to once a year.The period of decreased insurance payment from the previous paragraph shall be at least one year, and any subsequent request for compensation is not allowed once the application for decreased payment has been filed. The insurer shall formulate the regulations for decreased insurance payment. The insurer will then forward these regulations to the central competent authorities for approval and announcement.
中文原文 國民年金法第25條
被保險人得申請減領保險給付;其申請,一年以一次為限。
前項減領保險給付之期間至少一年,一經申請減領,不得請求補發;相關減領保險給付之辦法,由保險人擬訂,報請中央主管機關核定發布。

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