Databases       Tariff and Trade Statistics Concessions The Customs Tariff. Search for tariff items and find out duty rates and statistics of imports and exports. Search...     Search from a list of more than 20,000 duty concessions that eliminate duty on goods subject to a tariff.  Search... Supplier Codes List of Customs codes for more than 300,000 suppliers to New Zealand. Codes are required for Customs declarations. Search...