The Code of Criminal Procedure, 1973 (CrPC) deals with the effect of irregularities in proceedings in several sections:
\[\begin{array}{rl} \bullet & \text{Section 460 (Irregularities which do not vitiate proceedings): This section lists certain procedural errors that are considered minor and do not render the entire proceeding void.} \\ \bullet & \text{Section 461 (Irregularities which vitiate proceedings): This section lists more serious procedural errors that are considered fundamental defects. If a Magistrate not empowered by law does any of the things listed in this section (e.g., attaches and sells property, tries an offender), the proceedings are void.} \\ \bullet & \text{Section 462 deals with proceedings in the wrong place.} \\ \bullet & \text{Section 468 deals with the limitation period for taking cognizance of certain offences.} \\ \end{array}\]
Therefore, Section 461 is the correct answer.