Rules of Court are purposely made to be obeyed and followed, therefore all procedure set by the rules must be complied with. However, where in the course of following the rules some errors or mistakes are committed or omitted, such error or mistakes would not out rightly render the proceedings a nullity. Depending on the circumstance of each particular case, where the noncompliance has occasioned miscarriage of justice or where the right of the adverse party will be affected, the Court shall not treat the non-compliance as a mere irregularity and as such mandate the rules to be followed or nullify the proceedings as the case may be. But in a situation where it has not occasioned miscarriage of justice it shall be treated as a mere irregularity and should not vitiate the proceedings. This is because all rules of Court are made in aid of justice and that being so, the interest of justice will have to be given priority over any rule, compliance of which will lead to outright injustice. The Rules are not sine quo non in the determination of a case and therefore not immutable.
– Abba Aji JCA. Usman v. Tamadena (2015) – CA/K/95/2009