This is a list of special elections in the Philippines. The Philippines holds two types of special elections: those that were supposed to be held on election day but were delayed, and those held after an office has become vacant. This article describes the second type, which is also known outside the Philippines and the United States as "by-elections". This includes special elections to Congress and its predecessors: the Philippine Legislature, National Assembly of the Philippines, Commonwealth Congress and the Batasang Pambansa, to local legislatures and executive offices, if applicable. Most special elections are for vacancies in Congress. Scheduling In Republic Act (R.A.) No. 180, or the Revised Election Code of 1947, if a vacancy in either chamber of Congress occurs at least 10 months or before a regular election, the president shall call a special election as soon as the chamber where the vacancy occurred of the existence of such vacancy notified him. In Batas Pambansa Bilang (B.P. Blg.; National Law No.) 881, or the Omnibus Election Code of the Philippines, approved on December 3, 1985, in case of a vacancy in the Batasang Pambansa (National Parliament) 18 months or more before a regular election, the Commission on Elections shall call a special election to be held within sixty days after the vacancy occurs; in case parliament is dissolved, the President shall call an election which shall not be held earlier than forty-five nor later than sixty days from the date of such dissolution. Several weeks earlier, President Ferdinand Marcos ordered the Batasang Pambansa to call a special snap election a year prior to the regularly-schedule election. B.P. Blg 883 called the special presidential election on the same day B.P. Blg 881 was passed. Marcos was then ousted after the People Power Revolution when it was alleged he won that election via massive election fraud. The new government headed by President Corazon Aquino restored the presidential system with a bicameral Congress. The constitution ratified in 1987 provided Congress to convene on the third day of the vacancy of both the presidency and vice presidency to enact a law calling for a special election for both offices, with the exception that no election will be called if the next scheduled election is 18 months away. If only one of the offices is vacant, the vice president becomes president, or the president appoints a member of Congress as vice president, with