Constitution and rules of political parties
Section 223(2)(b) · 1999 Constitution (2004 edition)
What Constitution says
(b) the members of the executive committee or other governing body of the political character of Nigeria only if the members thereof belong to different states not being less in number than two-thirds of all the states of the Federation and the Federal Capital Territory, Abuja.
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 98–99. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections