New states and boundary adjustment, etc
Section 8(4) · 1999 Constitution (2004 edition)
What Constitution says
(4) A bill for a Law of House of Assembly for the purpose of boundary adjustment of any existing local government area shall only be passed if- (a) a request for the boundary adjustment is supported by two-thirds majority of members (representing the area demanding and the area affected by the boundary adjustment) in each of the following, namely - (i) the House of Assembly in respect of the area, and (ii) the local government council in respect of the area, is received by the House of Assembly; and (b) a proposal for the boundary adjustment is approved by a simple majority of members of the House of Assembly in respect of the area concerned.
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