Legislative powers
Section 4(1) · 1999 Constitution (2004 edition)
What Constitution says
(1) The legislative powers of the Federal Republic of Nigeria shall be vested in a National Assembly for the Federation, which shall consist of a Senate and a House of Representatives.
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