Legislative powers
Section 4(3) · 1999 Constitution (2004 edition)
What Constitution says
(3) The power of the National Assembly to make laws for the peace, order and good government of the Federation with respect to any matter included in the Exclusive Legislative List shall, save as otherwise provided in this Constitution, be to the exclusion of the Houses of Assembly of States.
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