Enforcement Rules of the Government Procurement Act Article 64-1
Where the lowest tender is adopted pursuant to subparagraph 1 or 2 of paragraph 1 of Article 52 of the Act, an entity shall specify the estimated quantity during the period of contract performance if the contract award is determined by the unit price of the subject of the procurement specified in the tender documentation due to indefinite quantity. Where there are two or more items under the procurement and the contract is not awarded by item, the contract award shall be determined by the sum of the total of unit price times the estimated quantity for each item.
中文原文 政府採購法施行細則第64-1條
機關依本法第五十二條第一項第一款或第二款規定採最低標決標，其因履約期間數量不確定而於招標文件規定以招標標的之單價決定最低標者，並應載明履約期間預估需求數量。
招標標的在二項以上而未採分項決標者，並應以各項單價及其預估需求數量之乘積加總計算，決定最低標。
招標標的在二項以上而未採分項決標者，並應以各項單價及其預估需求數量之乘積加總計算，決定最低標。