Section 28: Determination of nationality in special cases.

(1)
The Minister may give such directives as he thinks fit for the determination of the nationality of any person, or if a deportation order is in force, for the disregarding of any change of nationality and where at any time before or after entry into Nigeria the nationality of any person is or may be questioned, or after entry into Nigeria person for any reason changes his nationality, the burden of proof shall in any case, lie upon the person asserting the nationality, as the case may be.
(2) Save in the case of any person in or resident in Nigeria and claiming to be a citizen of Nigeria, no directive given under this section shall be questioned in any court.
(3)
Where a person is detained under this Act, any immigration officer authorised by the Comptroller-General of lmmigration or Minister, may do all things reasonably necessary for photographing, measuring or otherwise identifying him and to obtain his biometric data.