Mode of altering provisions of the Constitution
Section 9(4) · 1999 Constitution (2004 edition)
What Constitution says
(4) For the purposes of section 8 of this Constitution and of subsections (2) and (3) of this section, the number of members of each House of the National Assembly shall, notwithstanding any vacancy, be deemed to be the number of members specified in sections 48 and 49 of this Constitution.
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. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections