(3)The Central Government may, by notification in the Official Gazette, make rules for the purposes of this section, and without prejudice to the generality of the foregoing, such rules may provide for the manner in which articles liable for any duty or additional duty under sub-section (1) may be identified, and for the manner in which the export price and the normal value of, and the margin of dumping in relation to, such articles may be determined and for the assessment and collection of such duty or additional duty.