Judicial powers
Section 6(3) · 1999 Constitution (2004 edition)
What Constitution says
(3) The courts to which this section relates, established by this Constitution for the Federation and for the States, specified in subsection (5) (a) to (1) of this section, shall be the only superior courts of record in Nigeria; and save as otherwise prescribed by the National Assembly or by the House of Assembly of a State, each court shall have all the powers of a superior court of record.
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 20–21. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections