Existing law
Section 315(4)(a) · 1999 Constitution (2004 edition)
What Constitution says
(a) "appropriate authority" means - (i) the President, in relation to the provisions of any law of the Federation, (ii) the Governor of a State, in relation to the provisions of any existing law deemed to be a Law made by the House of Assembly of that State, or (iii) any person appointed by any law to revise or rewrite the laws of the Federation or of a State;
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 128–129. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections