Code of Criminal Procedure Act, 1973
375.No appeal in certain cases when accused pleads guilty.-
Notwithstanding anything contained in section 374, where an accused person has pleaded guilty and has been convicted on such plea, there shall be no appeal,-
(a) if the conviction is by a High Court; or
(b) if the conviction is by a Court of Session, Metropolitan Magistrate or Magistrate of the first or second class, except as to the extent or legality of the sentence.