(b)The district magistrate shall, before making an order of forfeiture after the expiry of the prescribed period serve a notice as required under section 21(4) in the like manner as for service of summons under the code of Criminal Procedure, 1898 (5 of 1898)4: Provided that, in the case of the depositor being a member of the armed forces of the Union, the notice shall served personally through the Commanding Officer of such member.