Personal Data Protection Act Article 13

Where a request is made by a data subject to a government or non-government agency pursuant to Article 10, the agency shall determine whether to accept or reject such request within fifteen days; such deadline may be extended by up to fifteen days if necessary, and the data subject shall be notified in writing of the reason for the extension.Where a request is made by a data subject to a government or non-government agency pursuant to Article 11, the agency shall determine whether to accept or reject such request within thirty days; such deadline may be extended by up to thirty days if necessary, and the data subject shall be notified in writing of the reason for the extension.
中文原文 個人資料保護法第13條
公務機關或非公務機關受理當事人依第十條規定之請求,應於十五日內,為准駁之決定;必要時,得予延長,延長之期間不得逾十五日,並應將其原因以書面通知請求人。
公務機關或非公務機關受理當事人依第十一條規定之請求,應於三十日內,為准駁之決定;必要時,得予延長,延長之期間不得逾三十日,並應將其原因以書面通知請求人。

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