Public officials Election And Recall Act Article 70
If the number of candidates does not meet or does not exceed the quota of candidates to be elected in each an electoral district, the candidates who receive the number of votes specified below shall be elected. However, this shall not apply to the election of chiefs of villages (boroughs):1. Regional legislators, mayors of special municipalities, mayors of counties (cities), mayors of townships (cities) and chiefs of indigenous districts must receive the votes of not less than 20% of the total number of voters in the electoral district.2. Indigenous legislators, special municipality councilors, county (city) councilors, township (city) council representatives, and indigenous district representatives must receive the votes of not less than 10% of the result of total number of voters in the electoral district divided by the quota for the electoral district.If the result of election specified in the preceding paragraph is that no one is elected or the number of electees is less than the quota, the vote for a new election shall be held within three months from the election day for regional legislators, indigenous legislators, mayors of special municipalities, mayors of counties (cities), mayors of townships (cities) and chiefs of indigenous districts; for special municipality councilors, county (city) councilors, township (city) representatives and indigenous district representatives, such offices shall be regarded as vacant. If the number of vacant offices in an electoral district reaches one half of the quota, the vote for a by-election shall be completed within three months from the day this circumstance arises.
中文原文 公職人員選舉罷免法第70條
候選人數未超過或不足各該選舉區應選出之名額時，以所得票數達下列規定以上者，始為當選。
但村（里）長選舉不在此限：
一、區域立法委員、直轄市長、縣（市）長、鄉（鎮、市）長、原住民區長選舉，為各該選舉區選舉人總數百分之二十。
二、原住民立法委員、直轄市議員、縣（市）議員、鄉（鎮、市）民代表、原住民區民代表選舉，為各該選舉區應選出之名額除該選舉區選舉人總數所得商數百分之十。
前項選舉結果未能當選或當選不足應選出之名額時，區域立法委員、原住民立法委員、直轄市長、縣（市）長、鄉（鎮、市）長、原住民區長，應自投票之日起三個月內完成重行選舉投票；直轄市議員、縣（市）議員、鄉（鎮、市）民代表、原住民區民代表視同缺額。
同一選舉區內缺額達二分之一時，應自事實發生之日起三個月內完成補選投票。
但村（里）長選舉不在此限：
一、區域立法委員、直轄市長、縣（市）長、鄉（鎮、市）長、原住民區長選舉，為各該選舉區選舉人總數百分之二十。
二、原住民立法委員、直轄市議員、縣（市）議員、鄉（鎮、市）民代表、原住民區民代表選舉，為各該選舉區應選出之名額除該選舉區選舉人總數所得商數百分之十。
前項選舉結果未能當選或當選不足應選出之名額時，區域立法委員、原住民立法委員、直轄市長、縣（市）長、鄉（鎮、市）長、原住民區長，應自投票之日起三個月內完成重行選舉投票；直轄市議員、縣（市）議員、鄉（鎮、市）民代表、原住民區民代表視同缺額。
同一選舉區內缺額達二分之一時，應自事實發生之日起三個月內完成補選投票。