According to Section 503 of the Criminal Procedure Code, who is authorized by the Court of Session or High Court to be appointed as a commissioner for recording a witness's testimony?

Explanation

Under Section 503 of the Cr.P.C., only a magistrate of the first class can be appointed by the Court of Session or the High Court as a commissioner to record evidence from a witness. Other individuals or magistrates of lower rank are not authorized for this role.