Section 133 of the Constitution of the Federal Republic of Nigeria

A candidate for an election to the office of President shall be deemed to have been duly elected to such office where, being the only candidate nominated for the election -

(a) he has a majority of YES votes over NO votes cast at the election; and

(b) he has not less than one-quarter of the votes cast at the election in each of at least two-thirds of all the States in the Federation and the Federal Capital Territory, Abuja