Periodical review of Senatorial districts and Federal constituencies
Section 73(2) · 1999 Constitution (2004 edition)
What Constitution says
(2) Notwithstanding subsection (1) of this section, the Independent National Electoral Commission may at any time carry out such a review and alter the districts or constituencies in accordance with the provisions of this section to such extent as it considers necessary, in consequence of any amendment to section 8 of this Constitution or any provision replacing that section, or by reason of the holding of a census of the population, or pursuant to an Act of the National Assembly.
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 50. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections