(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.
(2) The Federation shall, subject to an Act of the National Assembly made in that behalf, equip and maintain the armed forces as may be considered adequate and effective for the purpose of -
(a) defending Nigeria from external aggression;
(b) maintaining its territorial integrity and securing its borders from violation on land, sea, or air;
(c) suppressing insurrection and acting in aid of civil authorities to restore order when called upon to do so by the President, but subject to such conditions as may be prescribed by an Act of the National Assembly; and
(d) performance such other functions as may be prescribed by an Act of the National Assembly.
(3) The composition of the officer corps an other ranks of the armed forces of the Federation shall reflect the federal character of Nigeria.
Section 217 of the Constitution of the Federal Republic of Nigeria
Act structure