Standard Input Output Norms (SION) application process requires detailed inputs, certified data, and acceptance of Norms Committee fixation. Application ANF 4B prescribes the content and process for fixation, modification, or revision of Standard Input Output Norms (SION), requiring applicant and registration details, past export and production/consumption data, detailed export product and input schedules with ITC(HS) codes, wastage claims and supporting attachments (accountant and engineer certificates, technical appendices). Filings must be made online with digital signature; applicants must declare compliance with SCOMET rules where applicable, confirm updated IEC profiles, accept Norms Committee fixation, and acknowledge liability to pay customs duty with interest for inputs imported in excess of fixed norms.