Existing law
Section 315(3) · 1999 Constitution (2004 edition)
What Constitution says
(3) Nothing in this Constitution shall be construed as affecting the power of a court of law or any tribunal established by law to declare invalid any provision of an existing law on the ground of inconsistency with the provision of any other law, that is to say- (a) any other existing law; (b) a Law of a House of Assembly; (c) an Act of the National Assembly; or (d) any provision of this Constitution.
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 128–129. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections