Section 167(81) of the Act reads as follows : "If any person knowingly, and with intent to defraud the Government of any duty payable thereon, or to evade any prohibition or restriction for the time being in force under or by virtue of this Act with respect thereto acquires possession of, or is in any way concerned in carrying, removing, depositing, harboring, keeping or concealing or in any manner dealing with any goods which have been unlawfully removed from a warehouse or which are chargeable with a duty which has not been paid or with respect to the importation or exportation of which any prohibition or restriction is for the time being in force as aforesaid ; or if any person is in relation to any goods in any way knowingly concerned in any fraudulent evasion or attempt at evasion of any duty chargeable thereon or of any such prohibition or restriction as aforesaid or of any provision of this Act applicable to those goods, such person shall on conviction before a Magistrate be liable to imprisonment for any term not exceeding two years, or to fine, or to both.