Any brief of argument filed by a party out of time and without extension of time sought and obtained is incompetent and will not be taken but struck out at the hearing of an appeal. Where the extension of time granted has also expired, the party will still need another extension of time for revalidation or else the brief will be incompetent and liable to be struck out. See the cases of: (1) Mohammed V. Klargester (Nig.) Ltd. (1996) 1 NWLR (Pt. 422) p.54 at p.61 and (2) Goji V. Ewete (2001) 15 NWLR (Pt. 736) p.373.
— O.F. Omoleye JCA. Amaechi V. The Governor of Rivers State & Ors. (CA/PH/342/2015, 8 May 2017)