Irregularities That Do Not Vitiate Proceedings; Those That Do Vitiate

Explanation

Sections 460–466 draw the crucial line between procedural imperfections that can be overlooked and those that are fundamentally fatal. Section 460 lists irregularities that do not vitiate proceedings — minor technical lapses where no prejudice results. Section 461 lists irregularities that do vitiate — fundamental constitutional or statutory requirements whose breach is fatal (e.g., trial by an absolutely incompetent court). Section 462 is the general appellate rule: courts of appeal shall not reverse findings merely on account of error or irregularity unless a 'failure of justice' has actually occurred. The governing principle throughout is prejudice — did the procedural error actually harm the accused's ability to defend themselves? Technical imperfections that cause no real prejudice are excused; fundamental errors causing actual injustice are not. This framework underpins decades of Indian appellate jurisprudence on what grounds criminal convictions can be overturned.