Prerogative of mercy
Section 175(3) · 1999 Constitution (2004 edition)
What Constitution says
(3) The President, acting in accordance with the advice of the Council of State, may exercise his powers under subsection (1) of this section in relation to persons concerned with offences against the army, naval or air-force law or convicted or sentenced by a court- martial.
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 82. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections