Interpretation (federal bodies)
Section 161(a) · 1999 Constitution (2004 edition)
What Constitution says
(a) any reference to "ex officio member" shall be construed as a reference to a person who is a member by virtue of his holding or performing, the functions of an office in the public service 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 78. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections