Determination of certain questions relating to election
Section 139(a) · 1999 Constitution (2004 edition)
What Constitution says
(a) persons who may apply to the Court of Appeal for the determination of any question as to whether; (i) any person has been validly elected to the office of President or Vice-President (ii) the term of office of the President or Vice President has cease, or (iii) the office of the President or Vice-President has become vacant
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 70–71. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections