The concept of what jurisdiction encompasses was proffered in the judgment of this Honourable Court in Aladejobi v. N.B.A. (2013) 15 NWLR (Pt.1376) page 66 at 81, wherein this Court held as to the Constitution of jurisdiction thus: “It is said to be the authority which a Court has to decide matters that are litigated before it or to take cognizance of matters presented in a formal way for its decision. Such authority of the Court is controlled or circumscribed by the statute creating the Court itself or it may be circumscribed by a condition precedent created by a legislation which must be fulfilled before the Court can entertain the suit. It is the power and authority of a Court to hear and determine a judicial proceedings and power to render particular judgment in a cause of action.”
JURISDICTION IS FUNDAMENTAL TO ADJUDICATION
Jurisdiction, it is settled, is fundamental to adjudication. It is a radical and crucial necessity for, as in the instant case, where a Court proceeds without jurisdiction to hear the case, the proceedings so embarked upon by the Court are a nulity ab initio however well conducted the proceedings and brilliantly decided the issues agitated therein are. Defect in the Court’s competence is intrinsic and not extrinsic to the entire adjudicatory process. See Oloriode V. Oyebi (1984) 5 SC 1 at 32 33, Mustapha V, Governor of Lagos State and Musaconi Limited V. Mr. H, Aspinall (2013) LPELR 20745 (SC). It must be restated that a Court is only vested with jurisdiction and power to adjudicate on an issue when the matter is brought before it in accordance with both substantive and adjectival law. See Madukolu V. Nkemdilim (1962) SCNLR 341, Ukwu V. Bunge (1997) 8 NWLR (Pt 678) 527.
— M.D. Muhammad, JSC. Onyekwuluje v Animashaun (2019) – SC.72/2006