The Nigerian constitution as amended 1999 on the subject of qualification for candidate for presidency
25. (1) The following persons are citizens of Nigeria by birth-namely-
(a) every person born in Nigeria before the date of independence, either of whose parents
or any of whose grandparents belongs or belonged to a community indigenous to Nigeria;
Provided that a person shall not become a citizen of Nigeria by virtue of this section if neither of his parents nor any of his grandparents was born in Nigeria.
(b) every person born in Nigeria after the date of independence either of whose parents or any of whose grandparents is a citizen of Nigeria; and
(c) every person born outside Nigeria either of whose parents is a citizen of Nigeria. (2) In this section, “the date of independence” means the 1st day of October 1960.
31. For the purposes of this Chapter, a parent or grandparent of a person shall be deemed to be a citizen of Nigeria if at the time of the birth of that person such parent or grandparent would have possessed that status by birth if he had been alive on the date of independence; and in this section, “the date of independence” has the meaning assigned to it in section 25 (2) of this Constitution.
131. A person shall be qualified for election to the office of the President if –
(a) he is a citizen of Nigeria by birth;
(b) he has attained the age of forty years;
(c) he is a member of a political party and is sponsored by that political party; and
(d) he has been educated up to at least School Certificate level or its equivalent.
137. (1) A person shall not be qualified for election to the office of President if –
(a) subject to the provisions of section 28 of this Constitution, he has voluntarily acquired the citizenship of a country other than Nigeria or, except in such cases as may be prescribed by the National Assembly, he has made a declaration of allegiance to such other country; or
(b) he has been elected to such office at any two previous elections; or
(c) under the law in any part of Nigeria, he is adjudged to be a lunatic or otherwise declared to be of unsound mind;
(d) he is under a sentence of death imposed by any competent court of law or tribunal in Nigeria or a sentence of imprisonment or fine for any offence involving dishonesty or fraud (by whatever name called) or for any other offence, imposed on him by any court or tribunal or substituted by a competent authority for any other sentence imposed on him by such a court or tribunal; or
(e) within a period of less than ten years before the date of the election to the office of President he has been convicted and sentenced for an offence involving dishonesty or he has been found guilty of the contravention of the Code of Conduct; or
(f) he is an undischarged bankrupt, having been adjudged or otherwise declared bankrupt under any law in force in Nigeria or any other country; or
(g) being a person employed in the civil or public service of the Federation or of any State, he has not resigned, withdrawn or retired from the employment at least thirty days before the date of the election; or
(h) he is a member of any secret society; or
(i) he has been indicted for embezzlement or fraud by a Judicial Commission of Inquiry or an Administrative Panel of Inquiry or a Tribunal set up under the Tribunals of Inquiry Act, a Tribunals of Inquiry Law or any other law by the Federal or State Government which indictment has been accepted by the Federal or State Government, respectively; or
(j) he has presented a forged certificate to the Independent National Electoral Commission. (2) Where in respect of any person who has been –
(a) adjudged to be a lunatic;
(b) declared to be of unsound mind;
(c) sentenced to death or imprisonment; or (d) adjudged or declared bankrupt
(e) any appeal against the decision is pending in any court of law in accordance with any law in force in Nigeria, subsection (1) of this section shall not apply during a period beginning from the date when such appeal is lodged and ending on the date when the appeal is finally determined or, as the case may be, the appeal lapses or is abandoned, whichever is earlier.