New states and boundary adjustment, etc
Section 8(5) · 1999 Constitution (2004 edition)
What Constitution says
(5) An Act of the National Assembly passed in accordance with this section shall make consequential provisions with respect to the names and headquarters of State or Local government areas as provided in section 3 of this Constitution and in Parts I and II of the First Schedule to 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 22–24. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections