Standard Input Output Norms notified for chemical exports, enabling direct advance authorisations and more uniform approvals. Four new Standard Input Output Norms (SIONs) are notified for the Chemical and Allied Product group under Product Code 'A' for identified export products, with corresponding import inputs and permitted quantities specified in the schedule. The notification enables Regional Authorities to issue Advance Authorisations directly on the basis of the notified norms, without case-by-case referral to the Norms Committee, to streamline approvals and promote uniformity in decision-making.