(1) The sharia Court of Appeal of a State shall, in addition to such other jurisdiction as may be conferred upon it by the law of the State, exercise such appellate and supervisory jurisdiction in civil proceedings involving questions of Islamic personal Law which the court is competent to decide in accordance with the provisions of subsection (2) of this section.
(2) For the purposes of subsection (1) of this section, the sharia Court of Appeal shall be competent to decide -
(a) any question of Islamic personal Law regarding a marriage concluded in accordance with that Law, including a question relating to the validity or dissolution of such a marriage or a question that depends on such a marriage and relating to family relationship or the guardianship of an infant;
(b) where all the parties to the proceedings are muslims, any question of Islamic personal Law regarding a marriage, including the validity or dissolution of that marriage, or regarding family relationship, a founding or the guarding of an infant;
(c) any question of Islamic personal Law regarding a wakf, gift, will or succession where the endower, donor, testator or deceased person is a muslim;
(d) any question of Islamic personal Law regarding an infant, prodigal or person of unsound mind who is a muslim or the maintenance or the guardianship of a muslim who is physically or mentally infirm; or
(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.
Section 277 of the Constitution of the Federal Republic of Nigeria