Original jurisdiction (Supreme Court)
Section 232(1) · 1999 Constitution (2004 edition)
What Constitution says
(1) The Supreme Court shall, to the exclusion of any other court, have original jurisdiction in any dispute between the Federation and a state or between states if and in so far as that dispute involves any question (whether of law or fact) on which the existence or extent of a legal right depends.
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 101–102. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections