Jurisdiction (Sharia Court of Appeal of the FCT)
Section 262(2)(e) · 1999 Constitution (2004 edition)
What Constitution says
(e) where all the parties to the proceedings, being Muslims, have requested the court that hears the case in the first instance to determine that case in accordance with Islamic personal law, any other question.
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 112. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections