Section 6Omnibus Election Code of the Philippines (Batas Pambansa Blg. 881), Sec. 6

Failure of election. - If, on account of force majeure, violence, terrorism, fraud, or other analogous causes the election in any polling place has not been held on the date fixed, or had been suspended before the hour fixed by law for the closing of the voting, or after the voting and during the preparation and the transmission of the election returns or in the custody or canvass thereof, such election results in a failure to elect, and in any of such cases the failure or suspension of election would affect the result of the election, the Commission shall, on the basis of a verified petition by any interested party and after due notice and hearing, call for the holding or continuation of the election not held, suspended or which resulted in a failure to elect on a date reasonably close to the date of the election not held, suspended or which resulted in a failure to elect but not later than thirty days after the cessation of the cause of such postponement or suspension of the election or failure to elect.