EU GSP REX: exporters must register to self certify origin; consignments over 6000 require REX statements. The Public Notice notifies implementation of the Registered Exporter (REX) system for EU GSP self certification from 1 January 2017. Exporters may register without fee; registered exporters may self issue statements on origin on commercial documents to claim GSP preferences. A twelve month transition allows competent authorities to issue Form A until 31 December 2017; from 1 January 2018 consignments above EUR 6,000 require a REX statement by a registered exporter for preferential treatment. Competent authorities will register exporters, assign REX numbers, maintain records and perform verifications.