law: Custom Act, 1962 
  42.
  
  No Conveyance to Leave without Written Order. – 
  (1)
  
  The person-in-charge of a conveyance which has brought any imported goods or has
  
  loaded any export goods at a customs station shall not cause or permit the
  
  conveyance to depart from that customs station until a written order to that
  
  effect has been given by the proper officer.
  (2)
  
  No such order shall be given until –
  (a) the person-in-charge of the conveyance has answered the questions
  
  put to him under section 38;
  (b) the provisions of section 41 have been complied with;
  (c) the shipping bills or bills of export, the bills of transhipment, if
  
  any, and such other documents as the proper officer may require have been
  
  delivered to him;
  (d) all duties leviable on any stores consumed
  
  in such conveyance, and all charges and penalties due in respect of such
  
  conveyance or from the person-in-charge thereof have been paid or the payment
  
  secured by such guarantee or deposit of such amount as the proper officer may
  
  direct;
  (e) the person-in-charge of the conveyance has satisfied the proper
  
  officer that no penalty is leviable on him under
  
  section 116 or the payment of any penalty that may be levied upon him under
  
  that section has been secured by such guarantee or deposit of such amount as
  
  the proper officer may direct;
  (f) in any case where any export goods have been loaded without payment
  
  of export duty or in contravention of any provision of this Act or any other
  
  law for the time being in force relating to export of goods, - 
  ( i ) such goods have been unloaded, or
  (ii) where the Assistant Commissioner of Customs is satisfied that it is
  
  not practicable to unload such goods, the person- in_charge 
  
  of the conveyance has given an undertaking, secured by such guarantee or
  
  deposit of such amount as the proper officer may direct, for bringing back the
  
  goods to India.