Public order and public security
Section 11(4) · 1999 Constitution (2004 edition)
What Constitution says
(4) At any time when any House of Assembly of a State is unable to perform its functions by reason of the situation prevailing in that State, the National Assembly may make such laws for the peace, order and good government of that State with respect to matters on which a House of Assembly may make laws as may appear to the National Assembly to be necessary or expedient until such time as the House of Assembly is able to resume its functions; and any such laws enacted by the National Assembly pursuant to this section shall have effect as if they were laws enacted by the House of Assembly of the State: Provided that nothing in this section shall be construed as conferring on the National Assembly power to remove the Governor or the Deputy Governor of the State from office.
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 24–25. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections