Official source page 27

Any citizen of Nigeria of full age who wishes to renounce his Nigerian citizenship shall make a declaration in the prescribed manner for the r he President shall cause the declaration made under subsection (1) of this section to be registered and upon such registration, the person who made the ration shall cease to be a citizen of Nigeria. he President may withhold the registration of any declaration made under subsection (1) of this section if- e declaration is made during any war in which Nigeria is physically involved; or his opinion, it is otherwise contrary to public policy. or the purposes of subsection (1) of this section. ull age" means the age of eighteen years and above; y woman who is married shall be deemed to be of full age. The President may deprive a person, other than a person who is a citizen of Nigeria by birth or by registration, of his citizenship, if he is satisfied that su on has, within a period of seven years after becoming naturalised, been sentenced to imprisonment for a term of not less than three years. he President shall deprive a person, other than a person who is citizen of Nigeria by birth, of his citizenship, if he is satisfied from the records of proceedin ourt of law or other tribunal or after due inquiry in accordance with regulations made by him, that - e person has shown himself by act or speech to be disloyal towards the Federal Republic of Nigeria; or e person has, during any war in which Nigeria was engaged, unlawfully traded with the enemy or been engaged in or associated with any business that wa opinion of the president carried on in such a manner as to assist the enemy of Nigeria in that war, or unlawfully communicated with such enemy to the ment of or with intent to cause damage to the interest of Nigeria. or 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 t 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" e meaning assigned to it in section 25 (2) of this Constitution. The president may make regulations, not inconsistent with this Chapter, prescribing all matters which are required or permitted to be prescribed or whic ecessary or convenient to be prescribed for carrying out or giving effect to the provisions of this Chapter, and for granting special immigrant status with fu ntial rights to non-Nigerian spouses of citizens of Nigeria who do not wish to acquire Nigerian citizenship. ny regulations made by the president pursuant to the provisions of this section shall be laid before the National Assembly. Back to Page One Chapter IV Fundamental Rights Every person has a right to life, and no one shall be deprived intentionally of his life, save in execution of the sentence of a court in respect of a crimin ce of which he has been found guilty in Nigeria.