Renunciation of citizenship
Section 29(3) · 1999 Constitution (2004 edition)
What Constitution says
(3) The President may withhold the registration of any declaration made under subsection (1) of this section if- (a) the declaration is made during any war in which Nigeria is physically involved; or (b) in his opinion, it is otherwise contrary to public policy.
This is the 1999 Constitution as published in 2004. Later amendments aren't included yet, so a section may have changed since.
Original source
Official Gazette · CFRN 1999 official PDF · printed page 32. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections