13. (1) Any person who attempts to contravene, or abets or attempts to abet, or does any act preparatory to, a contravention, of, the provisions of this Act or of any order made or direction given thereunder, or fails to comply with any direction given in pursuance of any such order, shall be deemed to have contravened the provisions of this Act. (2) Any person who, knowing or having reasonable cause to believe that any other person has contravened the provisions of this Act or of any order made or direction given thereunder, gives that other person any assistance with intent thereby to prevent hinder or otherwise interfere with his arrest, trial or punishment for the said contravention shall be deemed to have abetted that contravention. (3) The master of any vessel or the pilot of any aircraft, as the case may be, by means of which any foreigner enters or leaves Bangladesh in contravention of any order made under, or direction given in pursuance of, section 3 shall, unless he proves that he exercised all due diligence to prevent the said contravention, be deemed to have contravened this Act.