ABSTRACT OF CBEC's Circular released in July, 17
IV. Changes in import procedures :
Importer Exporter Code (IEC) : In GST regime, GSTIN would be used for credit flow of IGST paid on import of goods. Therefore, GSTIN would be the key identifier. DGFT in its Trade Notice No. 09, dated 12-6-2017 has stated that PAN would be the Import Export Code (IEC). However, while PAN is identifier at the entity level, GSTIN would be used as identifier at the transaction level for every import and export. Further, in scenarios where GSTIN is not applicable, UIN or PAN would be accepted as IEC. It is advised that all importers need to quote GSTIN in their Bills of Entry in addition to IEC. In due course of time IEC would be replaced by PAN/GSTIN.