Presidential and Vice Presidential Election and Recall Act Article 64

In the case of the death of a candidate for vice president, if the candidate for president from that pair of candidates is elected president, the office of the vice president shall be regarded as vacant.If either the president-elect or the vice president-elect dies before taking office, or if the election is ruled invalid before they take office, the relevant office shall be regarded as vacant.If both the offices of president and vice president are regarded as vacant because both the president-elect and vice president-elect died before taking office or the election is ruled invalid before they take office, voting for the new election shall be completed within three months from the day of their deaths or from the day the Central Election Commission receives the decision from the court.