Anti dumping duty on soda ash imports imposes country specific per unit charges and a five year applicability period. Imposition of anti dumping duty on Disodium Carbonate (Soda Ash) under sub heading 283620 is ordered for imports from specified countries, with country and route specific unit rates (in US dollars per metric tonne) based on findings of dumping, non de minimis margins and material injury; duties apply for five years from Gazette publication, payable in Indian currency, with exchange rate determined by the Government's notification and the bill of entry date as the relevant date.