with such previous sentence. Sub- section (1) of Section 427, however, provides that the subsequent sentence of a person undergoing a sentence of imprisonment, unless of course the previous sentence of imprisonment is not imprisonment for life, shall run consecutively, i.e. the subsequent sentence shall commence at the expiration of the imprisonment to which such person has been previously sentenced, unless the Court directs that the subsequent sentence shall run concurrently with the previous sentence. Hence, if a person is already undergoing a sentence of imprisonment for life, his subsequent conviction to imprisonment, which may be for any term or for imprisonment for life, shall have to run concurrently with the previous sentence for which the Court's order is not necessary. On the reverse situation i.e. if a person is undergoing a sentence of imprisonment, but not the imprisonment for life, and he has been subsequently convicted to imprisonment for any term or imprisonment for life, there must be an order of the Court for the subsequent sentence to run concurrently with the previous sentence.