Procedure for proclamation of state of emergency
Section 305(3)(c) · 1999 Constitution (2004 edition)
What Constitution says
(c) there is actual breakdown of public order and public safety in the Federation or any part thereof to such extent as to require extraordinary measures to restore peace and security;
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