Standard Input Output Norms or SION in short is standard norms which define the amount of input/inputs required to manufacture unit of output for export purpose. Input output norms are applicable for the products such as electronics, engineering, chemical, food products including fish and marine products, handicraft, plastic and leather products etc.SIONis notified by DGFT in the Handbook (Vol.2), and is approved by its Boards of Directors. An application for modification of existing Standard Input-Output norms may be filed by manufacturer exporter and merchant-exporter. The Directorate General of Foreign Trade (DGFT) from time to time issue notifications for fixation or addition of SION for different export products. Fixation of Standard Input Output Norms facilitates issues of Advance License to the exporters of the items without any need for referring the same to the Headquarter office of DGFT on repeat basis