Referendum Act Article 50

If the number of votes for or against a referendum proposal is misrepresented in a manner that could have affected the results of the referendum, a public prosecutor or the lead proposer of the referendum proposal may, within fifteen days of the date on which the results of the referendum are announced, file a lawsuit with the court with jurisdiction to confirm whether the referendum proposal was passed or rejected, naming the relevant election commission as the defendant.If a court renders a final judgment in a lawsuit to confirm whether a referendum proposal was passed or rejected, and the judgment changes the original results of the referendum, the competent authority shall, within seven days of receiving the judgment, take the actions stipulated in Articles 30 and 31.
中文原文 公民投票法第50條
公民投票案之通過或不通過,其票數不實足以影響投票結果者,檢察官、公民投票案提案人之領銜人,得於投票結果公告之日起十五日內,以該管選舉委員會為被告,向管轄法院提起確認公民投票案通過或不通過之訴。
公民投票案通過或不通過確認之訴,經法院判決確定,變更原投票結果者,主管機關應於法院確定判決送達之日起七日內,依第三十條、第三十一條之規定辦理。

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