A registered chieftaincy declaration when pleaded and tendered in court is admissible and valid when a matter before the court relates to chieftaincy issues. A registered chieftaincy declaration is a declaration of the tradition, customary law and usage pertaining to the selection and appointment to the particular chieftaincy stool/throne it is a form of codified customary law relating to the nomination and selection of persons for certain chieftaincy titles and positions. Adeosun V. Gov. Ekiti State (2012) 4 NWLR (Pt. 1291) 581 SC.