Standard Input-Output Norms require proportional imports to match polyurethane resin solution export composition and ensure compliance. Standard Input-Output Norms prescribe component import quantities per unit export of Polyurethane Resin Solution at sixty percent resin total solid content, listing acids, glycols, isocyanates and solvent. Components one through five must be adjusted on a pro rata basis for differing resin percentages; solvent quantities are to be computed in inverse proportion to solvent content. Applicants must ensure imported goods are those actually used or required in the declared export product, and schedules allow authorities to determine allowable input proportions for manufacture.