Enforcement Rules of the Government Procurement Act Article 57

Where the opening of tenders under open tendering procedures cannot be proceeded due to the lack of three or more tenders, the tenders may be returned to the tenderers. When a tenderer requests that its tender be returned, the entity shall not reject it.Where a tendering procedure is nullified after tender opening, and a tenderer requests that its tender be returned, the entity may retain one copy or one xerox copy of the tender and return the rest. Where multi-step opening of tenders is adopted, the unopened tenders shall be returned.
中文原文 政府採購法施行細則第57條
機關辦理公開招標,因投標廠商家數未滿三家而流標者,得發還投標文件。
廠商要求發還者,機關不得拒絕。
機關於開標後因故廢標,廠商要求發還投標文件者,機關得保留其中一份,其餘發還,或僅保留影本。
採分段開標者,尚未開標之部分應予發還。

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