433A. Restriction on powers of remission or commutation in certain cases.- Notwithstanding anything contained in section 432, where a sentence of imprisonment for life is imposed on conviction of a person for an offence for which death is one of the punishment provided by laws or where a sentence of death imposed on a person has been commuted under section 433 into one of imprisonment for life, such person shall not be released from prison unless he had served at least fourteen years of imprisonment.