1) The document discusses the Registered Exporter (REX) scheme which will replace the current GSP 'Form A' system for claiming tariff preferences under the Generalized System of Preferences (GSP). 2) Starting January 1, 2017 exporters in six countries (Congo, Democratic Republic of Congo, India, Kenya, Laos, and Solomon Islands) must register with the competent authority and will make invoice declarations instead of issuing Form A certificates. 3) Importers claiming GSP preferences from these countries need to ensure their suppliers are registered under REX, otherwise they may lose the tariff reduction and have to pay the full customs duty as Form A certificates will be phased out.