Legislative powers
Section 4(8) · 1999 Constitution (2004 edition)
What Constitution says
(8) Save as otherwise provided by this Constitution, the exercise of legislative powers by the National Assembly or by a House of Assembly shall be subject to the jurisdiction of courts of law and of judicial tribunals established by law, and accordingly, the National Assembly or a House of Assembly shall not enact any law, that ousts or purports to oust the jurisdiction of a court of law or of a judicial tribunal established by law.
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 18–19. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections