Input output norms for sports goods govern permitted imported components and require imports to match use in export manufacture. Standard input output norms specify permitted imported inputs and indicative quantities for manufacture of size 3 sports balls composed of synthetic rubber nitrile/SBR with cotton or polyester/viscose fabric layers and a butyl or latex bladder, including specifications for rubber compound, fabric area per layer, bladder count, adhesive per layer, and ink; deleted schedule entries are noted and applicants must ensure imported goods match those used or required in the export product and adhere to determined input proportions.