Judgments and orders passed by an Appellate Court upon an appeal shall be final, except in the cases provided for in
section 418,
section 419, sub-section (4) of
section 425 or Chapter XXXII:
Provided that notwithstanding the final disposal of an appeal against conviction in any case, the
Appellate Court may hear and dispose of, on the merits,---
(a) an appeal against acquittal under
section 419, arising out of the same case; or
(b) an appeal for the enhancement of sentence under
section 418, arising out of the same case.
