37. The provisions of sections 64 to 70, both inclusive, of the ²[* * *] Penal Code, and of sections 386 to 389, both inclusive, of the Code of Criminal Procedure, 1882, with respect to fines, shall apply to penalties and fines imposed under this Act on conviction before a Magistrate:Provided that, notwithstanding anything contained in section 65 of the first-mentioned Code, any person sentenced to fine under section 34 of this Act may be imprisoned in default of payment of such fine for any period not exceeding eight days.