"It is also settled law that where a Registered Declaration exits in relation to a chieftaincy, it constitutes a complete statement of the relevant customs/traditions and/or customary law applicable to the said chieftaincy and the Court and parties are not allowed to go outside it in deciding the applicable customary law except where there is evidence that the said chieftaincy declaration is fundamentally defective or does not contain the real custom/customary law of the people applicable to the stool in question, etc."

Per ONNOGHEN, J.S.C in CHIEF AYOOLA ADEOSUN v. THE GOVERNOR OF EKITI STATE & ORS 2012) 1 SC (Pt. I) 180