Thus, the effect of making Exhibit 7, a subsidiary legislation with retrospective effect, to take care of the appointment process of the Emirship of Suleja, which as I earlier pointed out, has the force of law and now over-rides customary law. This is the moreso, in the instant case where confusion characterising the kingmaker’s body charged with the selection process and which was not helped by declaring what role the customary law vis-a-vis Exhibit 10 (the chronicle of Abuja) played in that process needed to be formalised and codified.
— Onu JSC. Ibrahim v Barde (1996) – SC.74/1995