Special additional duty exemption for SEZ manufactured goods sold in domestic tariff area when not state sales tax exempt. A nil rate of special additional duty is specified for goods manufactured by a Special Economic Zone unit and brought into the domestic tariff area for sale, provided those goods are not exempt from state sales tax when sold domestically; the exemption excludes transfers on a stock transfer basis to a domestic tariff area unit and adopts the established statutory meaning of 'manufacture,' with a specified commencement date.