Section 14Omnibus Election Code of the Philippines (Batas Pambansa Blg. 881), Sec. 14

Special election for President and Vice-President. - In case a vacancy occurs for the Office of the President and Vice-President, the Batasang Pambansa shall, at ten o'clock in the morning of the third day after the vacancy occurs, convene in accordance with its rules without need of a call and within seven days enact a law calling for a special election to elect a President and a Vice-President to be held not earlier than forty-five days nor later than sixty days from the time of such call. The bill calling such special election shall be deemed certified under paragraph (2), Section 19, Article VIII of the Constitution and shall become law upon its approval on third reading by the Batasang Pambansa.

Appropriations for the special election shall be charged against any current appropriations and shall be exempt from the requirements of paragraph (4), Section 16 of Article VIII of the Constitution. The convening of the Batasang Pambansa cannot be suspended nor the special election postponed. No special election shall be called if the vacancy occurs within seventy days before the date of the presidential election of 1987.