<P> (b) The 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 was in the 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 detriment of or with intent to cause damage to the interest of Nigeria . </P> <P> 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 . </P> <P> 32 . (1) The president may make regulations, not inconsistent with this Chapter, prescribing all matters which are required or permitted to be prescribed or which are necessary or convenient to be prescribed for carrying out or giving effect to the provisions of this Chapter, and for granting special immigrant status with full residential rights to non-Nigerian spouses of citizens of Nigeria who do not wish to acquire Nigerian citizenship . </P> <P> (2) Any regulations made by the president pursuant to the provisions of this section shall be laid before the National Assembly NIGERIA </P>

Who is a citizen according to nigerian constitution