Input-output norms for audio cassette inputs require imported goods to match prescribed manufacturing inputs under FTP. Standard Input-Output Norms require applicants to ensure imported goods conform to prescribed input/output specifications for pre-recorded and blank audio cassettes; SION B125 lists 100 Nos and links blank cassette inputs to raw materials per Sl. No. 13, and the SION is suspended by Public Notice No. 03/2024-25 dated 03-05-2024.