Enforcement Rules of the Government Procurement Act Article 93

Where a preliminary inspection is adopted and passed, the entity shall conduct the inspection and acceptance and make a record within 20 days, unless otherwise specified in the contract.
中文原文 政府採購法施行細則第93條
採購之驗收,有初驗程序者,初驗合格後,除契約另有規定者外,機關應於二十日內辦理驗收,並作成驗收紀錄。

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