Command and operational use
Section 218(4) · 1999 Constitution (2004 edition)
What Constitution says
(4) The National Assembly shall have power to make laws for the regulation of - (a) the powers exercisable by the President as Commander-in-Chief of the Armed Forces of the Federation; and (b) the appointment, promotion and disciplinary control of members of the armed forces of the Federation.
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 97. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections