It is clear that both issues are confined to the competence of the plaintiffs/respondents to sue in the matter. As they do not extend to the competence of the defendants/appellants to defend the action, I shall not go there. This is because parties are, bound by the issues formulated in their briefs. In other words, a party cannot advance an argument outside the issue or issues formulated in the brief without leave of Court. This stems from the larger ambit of our adjectival law that parties are, bound by their briefs.
— Niki Tobi, JSC. Mozie & Ors. v. Mbamalu & Ors. (2006) – S.C.345/2001