The Freedom of Government Information Law Article 15

After receiving the request for correcting or supplementing the government information within thirty days, the government agency shall determine whether to approve such a request; the time may be extended for no longer than thirty days if necessary.Where a government agency is requested to correct or supplement the government information, Article 9, 11 and paragraph 2 to 4 of Article 12 shall apply mutatis mutandis.
中文原文 政府資訊公開法第15條
政府機關應於受理申請更正或補充政府資訊之日起三十日內,為准駁之決定;必要時,得予延長,延長之期間不得逾三十日。
第九條、第十一條及第十二條第二項至第四項之規定,於申請政府機關更正或補充政府資訊時,準用之。

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