New states and boundary adjustment, etc
Section 8(6) · 1999 Constitution (2004 edition)
What Constitution says
(6) For the purpose of enabling the National Assembly to exercise the powers conferred upon it by subsection (5) of this section, each House of Assembly shall, after the creation of more local government areas pursuant to subsection (3) of this section, make adequate returns to each House of the National Assembly
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 22–24. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections