<h1>Standard Input-Output Norms govern permissible imported inputs for PCB router manufacture and require demonstrable use in export product.</h1> Standard Input-Output Norms set benchmark inputs for manufacture of a PCB router from solid tungsten carbide blanks, listing specified blanks and consumable diamond grinding wheels with quantity relationships per export unit. The Schedules require determination of input proportions and impose an obligation on applicants to ensure imported goods are those actually used or required in the export product, linking import authorisation to demonstrable use in export manufacture.