Establishment and composition of the armed forces of the Federation
Section 217(1) · 1999 Constitution (2004 edition)
What Constitution says
(1) There shall be an armed forces for the Federation which shall consist of an army, a navy, an Air Force and such other branches of the armed forces of the Federation as may be established by an Act 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 97. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections