Executive responsibilities of Ministers
Section 148(1) · 1999 Constitution (2004 edition)
What Constitution says
(1) The President may, in his discretion, assign to the Vice-President or any Minister of the Government of the Federation responsibility for any business of the Government of the Federation, including the administration of any department of government.
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 74. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections