If any goods loaded in a conveyance for importation into India, or any goods transhipped under the provisions of this Act or coastal goods carried in a conveyance, are not unloaded at their place of destination in India, or if the quantity unloaded is short of the quantity to be unloaded at that destination, and if the failure to unload or the deficiency is not accounted for to the satisfaction of the ¹[Assistant Commissioner of Customs or Deputy Commissioner of Customs], the person-in-charge of the conveyance shall be liable,--

   (a)  in the case of goods loaded in a conveyance for importation into India or goods transhipped under the provisions of this Act, to a penalty not exceeding twice the amount of duty that would have been chargeable on the goods not unloaded or the deficient goods, as the case may be, had such goods been imported;

   (b)  in the case of coastal goods, to a penalty not exceeding twice the amount of export duty that would have been chargeable on the goods not unloaded or the deficient goods, as the case may be, had such goods been exported.