The declaration processing capability is the core component of any Customs Software. It reflects both the system behaviour and the Customs practice in force. When it is plugged into its surrounding environment, which includes the Customs Tariff, reference tables, taxation rules and the other Customs legal basis, a complete customs automated system is created.
The SAD (Single Administrative Document) is used to control the import and export of goods in Antigua and Barbuda. The SAD includes data used to calculate and eventual collection of taxes and duties as well as the main source of national trade statistics.