Policy 9.53 Document type Policy Dated 17 Apr 2015 Category Foreign Trade Policy (wef 01/04/2015) <a href='http://eximkey.net/Upload/Spotlight/FTP2015-2020/ftp2015-20E.pdf' target='_blank'>PDF</a> DEFINITIONS DEFINITIONS 9.53 "SION" means Standard Input Output Norms notified by DGFT.