Procedure for proclamation of state of emergency
Section 305(6)(b) · 1999 Constitution (2004 edition)
What Constitution says
(b) if it affects the Federation or any part thereof and within two days when the National Assembly is in session, or within ten days when the National Assembly is not in session, after its publication, there is no resolution supported by two-thirds majority of all the members of each House of the National Assembly approving the Proclamation;
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 124–125. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections