Where the law or rule prescribed the procedure to be taken in the performance of an act is not complied with, the performance of the act in the circumstance is a nullity. Section 233 (3) (a) provides that subject to the provisions of “Subsection (2) of this section, an appeal shall lie from the decisions of the Court of Appeal to the Supreme Court with leave of the Court of Appeal or the Supreme Court.” In other words, a party desiring to appeal the decision of the Court of Appeal to the Supreme Court on mixed law and facts or facts is required to obtain the leave of the Court of Appeal or the Supreme Court to file the notice and grounds of appeal.
— W.S.N. Onnoghen, JSC. SPDC v Agbara (2019) – SC.731/2017(R)